diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0001-drm-Add-component-aware-simple-encoder.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0001-drm-Add-component-aware-simple-encoder.patch
new file mode 100644
index 0000000..1586034
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0001-drm-Add-component-aware-simple-encoder.patch
@@ -0,0 +1,365 @@
+From 39e6b51150c36dd659b85de0c4339594da389da9 Mon Sep 17 00:00:00 2001
+From: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Date: Tue, 16 Jun 2020 12:39:06 +0000
+Subject: [PATCH 01/22] drm: Add component-aware simple encoder
+
+This is a simple DRM encoder that gets its connector timings information
+from a OF subnode in the device tree and exposes that as a "discovered"
+panel. It can be used together with component-based DRM drivers in an
+emulated environment where no real encoder or connector hardware exists
+and the display output is configured outside the kernel.
+
+Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+
+Upstream-Status: Backport [https://git.linaro.org/landing-teams/working/arm/kernel-release.git/commit/?h=latest-armlt&id=15283f7be4b1e586702551e85b4caf06531ac2fc]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ drivers/gpu/drm/Kconfig               |  11 +
+ drivers/gpu/drm/Makefile              |   2 +
+ drivers/gpu/drm/drm_virtual_encoder.c | 299 ++++++++++++++++++++++++++
+ 3 files changed, 312 insertions(+)
+ create mode 100644 drivers/gpu/drm/drm_virtual_encoder.c
+
+diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
+index ca868271f4c4..6ae8ba3ca7b3 100644
+--- a/drivers/gpu/drm/Kconfig
++++ b/drivers/gpu/drm/Kconfig
+@@ -300,6 +300,17 @@ config DRM_VKMS
+ 
+ 	  If M is selected the module will be called vkms.
+ 
++config DRM_VIRT_ENCODER
++       tristate "Virtual OF-based encoder"
++       depends on DRM && OF
++       select VIDEOMODE_HELPERS
++       help
++         Choose this option to get a virtual encoder and its associated
++         connector that will use the device tree to read the display
++         timings information. If M is selected the module will be called
++         drm_vencoder.
++
++
+ source "drivers/gpu/drm/exynos/Kconfig"
+ 
+ source "drivers/gpu/drm/rockchip/Kconfig"
+diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
+index 81569009f884..a3429152c613 100644
+--- a/drivers/gpu/drm/Makefile
++++ b/drivers/gpu/drm/Makefile
+@@ -56,6 +56,8 @@ drm_kms_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
+ 
+ obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
+ obj-$(CONFIG_DRM_DEBUG_SELFTEST) += selftests/
++drm_vencoder-y := drm_virtual_encoder.o
++obj-$(CONFIG_DRM_VIRT_ENCODER) += drm_vencoder.o
+ 
+ obj-$(CONFIG_DRM)	+= drm.o
+ obj-$(CONFIG_DRM_MIPI_DBI) += drm_mipi_dbi.o
+diff --git a/drivers/gpu/drm/drm_virtual_encoder.c b/drivers/gpu/drm/drm_virtual_encoder.c
+new file mode 100644
+index 000000000000..2f65c6b47d00
+--- /dev/null
++++ b/drivers/gpu/drm/drm_virtual_encoder.c
+@@ -0,0 +1,299 @@
++/*
++ * Copyright (C) 2016 ARM Limited
++ * Author: Liviu Dudau <Liviu.Dudau@arm.com>
++ *
++ * Dummy encoder and connector that use the OF to "discover" the attached
++ * display timings. Can be used in situations where the encoder and connector's
++ * functionality are emulated and no setup steps are needed, or to describe
++ * attached panels for which no driver exists but can be used without
++ * additional hardware setup.
++ *
++ * The encoder also uses the component framework so that it can be a quick
++ * replacement for existing drivers when testing in an emulated environment.
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License.  See the file COPYING in the main directory of this archive
++ * for more details.
++ *
++ */
++
++#include <drm/drm_crtc.h>
++#include <drm/drm_atomic_helper.h>
++#include <drm/drm_crtc_helper.h>
++#include <drm/drm_probe_helper.h>
++#include <drm/drm_print.h>
++#include <linux/platform_device.h>
++#include <drm/drm_of.h>
++#include <linux/component.h>
++#include <video/display_timing.h>
++#include <video/of_display_timing.h>
++#include <video/videomode.h>
++
++struct drm_virt_priv {
++	struct drm_connector connector;
++	struct drm_encoder encoder;
++	struct display_timings *timings;
++};
++
++#define connector_to_drm_virt_priv(x) \
++	container_of(x, struct drm_virt_priv, connector)
++
++#define encoder_to_drm_virt_priv(x) \
++	container_of(x, struct drm_virt_priv, encoder)
++
++static void drm_virtcon_destroy(struct drm_connector *connector)
++{
++	struct drm_virt_priv *conn = connector_to_drm_virt_priv(connector);
++
++	drm_connector_cleanup(connector);
++	display_timings_release(conn->timings);
++}
++
++static enum drm_connector_status
++drm_virtcon_detect(struct drm_connector *connector, bool force)
++{
++	return connector_status_connected;
++}
++
++static const struct drm_connector_funcs drm_virtcon_funcs = {
++	.reset = drm_atomic_helper_connector_reset,
++	.detect	= drm_virtcon_detect,
++	.fill_modes = drm_helper_probe_single_connector_modes,
++	.destroy = drm_virtcon_destroy,
++	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
++	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
++};
++
++static int drm_virtcon_get_modes(struct drm_connector *connector)
++{
++	struct drm_virt_priv *conn = connector_to_drm_virt_priv(connector);
++	struct display_timings *timings = conn->timings;
++	int i;
++
++	for (i = 0; i < timings->num_timings; i++) {
++		struct drm_display_mode *mode = drm_mode_create(connector->dev);
++		struct videomode vm;
++
++		if (videomode_from_timings(timings, &vm, i))
++			break;
++
++		drm_display_mode_from_videomode(&vm, mode);
++		mode->type = DRM_MODE_TYPE_DRIVER;
++		if (timings->native_mode == i)
++			mode->type = DRM_MODE_TYPE_PREFERRED;
++
++		drm_mode_set_name(mode);
++		drm_mode_probed_add(connector, mode);
++	}
++
++	return i;
++}
++
++static int drm_virtcon_mode_valid(struct drm_connector *connector,
++				   struct drm_display_mode *mode)
++{
++	return MODE_OK;
++}
++
++struct drm_encoder *drm_virtcon_best_encoder(struct drm_connector *connector)
++{
++	struct drm_virt_priv *priv = connector_to_drm_virt_priv(connector);
++
++	return &priv->encoder;
++}
++
++struct drm_encoder *
++drm_virtcon_atomic_best_encoder(struct drm_connector *connector,
++				 struct drm_connector_state *connector_state)
++{
++	struct drm_virt_priv *priv = connector_to_drm_virt_priv(connector);
++
++	return &priv->encoder;
++}
++
++static const struct drm_connector_helper_funcs drm_virtcon_helper_funcs = {
++	.get_modes = drm_virtcon_get_modes,
++	.mode_valid = drm_virtcon_mode_valid,
++	.best_encoder = drm_virtcon_best_encoder,
++	.atomic_best_encoder = drm_virtcon_atomic_best_encoder,
++};
++
++static void drm_vencoder_destroy(struct drm_encoder *encoder)
++{
++	drm_encoder_cleanup(encoder);
++}
++
++static const struct drm_encoder_funcs drm_vencoder_funcs = {
++	.destroy = drm_vencoder_destroy,
++};
++
++static void drm_vencoder_dpms(struct drm_encoder *encoder, int mode)
++{
++	/* nothing needed */
++}
++
++static bool drm_vencoder_mode_fixup(struct drm_encoder *encoder,
++				    const struct drm_display_mode *mode,
++				    struct drm_display_mode *adjusted_mode)
++{
++	/* nothing needed */
++	return true;
++}
++
++static void drm_vencoder_prepare(struct drm_encoder *encoder)
++{
++	drm_vencoder_dpms(encoder, DRM_MODE_DPMS_OFF);
++}
++
++static void drm_vencoder_commit(struct drm_encoder *encoder)
++{
++	drm_vencoder_dpms(encoder, DRM_MODE_DPMS_ON);
++}
++
++static void drm_vencoder_mode_set(struct drm_encoder *encoder,
++				  struct drm_display_mode *mode,
++				  struct drm_display_mode *adjusted_mode)
++{
++	/* nothing needed */
++}
++
++static const struct drm_encoder_helper_funcs drm_vencoder_helper_funcs = {
++	.dpms		= drm_vencoder_dpms,
++	.mode_fixup	= drm_vencoder_mode_fixup,
++	.prepare	= drm_vencoder_prepare,
++	.commit		= drm_vencoder_commit,
++	.mode_set	= drm_vencoder_mode_set,
++};
++
++static int drm_vencoder_bind(struct device *dev, struct device *master,
++			     void *data)
++{
++	struct drm_encoder *encoder;
++	struct drm_virt_priv *con;
++	struct drm_connector *connector;
++	struct drm_device *drm = data;
++	u32 crtcs = 0;
++	int ret;
++
++	con = devm_kzalloc(dev, sizeof(*con), GFP_KERNEL);
++	if (!con)
++		return -ENOMEM;
++
++	dev_set_drvdata(dev, con);
++	connector = &con->connector;
++	encoder = &con->encoder;
++
++	if (dev->of_node) {
++		struct drm_bridge *bridge;
++		crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
++		bridge = of_drm_find_bridge(dev->of_node);
++		if (bridge) {
++			ret = drm_bridge_attach(encoder, bridge, NULL, 0);
++			if (ret) {
++				DRM_ERROR("Failed to initialize bridge\n");
++				return ret;
++			}
++		}
++		con->timings = of_get_display_timings(dev->of_node);
++		if (!con->timings) {
++			dev_err(dev, "failed to get display panel timings\n");
++			return ENXIO;
++		}
++	}
++
++	/* If no CRTCs were found, fall back to the old encoder's behaviour */
++	if (crtcs == 0) {
++		dev_warn(dev, "Falling back to first CRTC\n");
++		crtcs = 1 << 0;
++	}
++
++	encoder->possible_crtcs = crtcs ? crtcs : 1;
++	encoder->possible_clones = 0;
++
++	ret = drm_encoder_init(drm, encoder, &drm_vencoder_funcs,
++			       DRM_MODE_ENCODER_VIRTUAL, NULL);
++	if (ret)
++		goto encoder_init_err;
++
++	drm_encoder_helper_add(encoder, &drm_vencoder_helper_funcs);
++
++	/* bogus values, pretend we're a 24" screen for DPI calculations */
++	connector->display_info.width_mm = 519;
++	connector->display_info.height_mm = 324;
++	connector->interlace_allowed = false;
++	connector->doublescan_allowed = false;
++	connector->polled = 0;
++
++	ret = drm_connector_init(drm, connector, &drm_virtcon_funcs,
++				 DRM_MODE_CONNECTOR_VIRTUAL);
++	if (ret)
++		goto connector_init_err;
++
++	drm_connector_helper_add(connector, &drm_virtcon_helper_funcs);
++
++	drm_connector_register(connector);
++
++	ret = drm_connector_attach_encoder(connector, encoder);
++	if (ret)
++		goto attach_err;
++
++	return ret;
++
++attach_err:
++	drm_connector_unregister(connector);
++	drm_connector_cleanup(connector);
++connector_init_err:
++	drm_encoder_cleanup(encoder);
++encoder_init_err:
++	display_timings_release(con->timings);
++
++	return ret;
++};
++
++static void drm_vencoder_unbind(struct device *dev, struct device *master,
++				void *data)
++{
++	struct drm_virt_priv *con = dev_get_drvdata(dev);
++
++	drm_connector_unregister(&con->connector);
++	drm_connector_cleanup(&con->connector);
++	drm_encoder_cleanup(&con->encoder);
++	display_timings_release(con->timings);
++}
++
++static const struct component_ops drm_vencoder_ops = {
++	.bind = drm_vencoder_bind,
++	.unbind = drm_vencoder_unbind,
++};
++
++static int drm_vencoder_probe(struct platform_device *pdev)
++{
++	return component_add(&pdev->dev, &drm_vencoder_ops);
++}
++
++static int drm_vencoder_remove(struct platform_device *pdev)
++{
++	component_del(&pdev->dev, &drm_vencoder_ops);
++	return 0;
++}
++
++static const struct of_device_id drm_vencoder_of_match[] = {
++	{ .compatible = "drm,virtual-encoder", },
++	{},
++};
++MODULE_DEVICE_TABLE(of, drm_vencoder_of_match);
++
++static struct platform_driver drm_vencoder_driver = {
++	.probe = drm_vencoder_probe,
++	.remove = drm_vencoder_remove,
++	.driver = {
++		.name = "drm_vencoder",
++		.of_match_table = drm_vencoder_of_match,
++	},
++};
++
++module_platform_driver(drm_vencoder_driver);
++
++MODULE_AUTHOR("Liviu Dudau");
++MODULE_DESCRIPTION("Virtual DRM Encoder");
++MODULE_LICENSE("GPL v2");
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0002-drm-arm-komeda-add-RENDER-capability-to-the-device-n.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0002-drm-arm-komeda-add-RENDER-capability-to-the-device-n.patch
new file mode 100644
index 0000000..77519f1
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0002-drm-arm-komeda-add-RENDER-capability-to-the-device-n.patch
@@ -0,0 +1,32 @@
+From 1b2c200673b4a08324f3a6575b30bd16030ed586 Mon Sep 17 00:00:00 2001
+From: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Date: Wed, 17 Jun 2020 10:49:26 +0000
+Subject: [PATCH 02/22] drm: arm: komeda: add RENDER capability to the device
+ node
+
+this is required to make this driver work with android framework
+
+Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+
+Upstream-Status: Inappropriate [Product specific configuration]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+index 1f6682032ca4..9d1a1942e673 100644
+--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
++++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+@@ -59,7 +59,7 @@ static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
+ }
+ 
+ static struct drm_driver komeda_kms_driver = {
+-	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
++	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_RENDER,
+ 	.lastclose			= drm_fb_helper_lastclose,
+ 	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(komeda_gem_cma_dumb_create),
+ 	.fops = &komeda_cma_fops,
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0003-dt-bindings-mailbox-arm-mhuv2-Add-bindings.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0003-dt-bindings-mailbox-arm-mhuv2-Add-bindings.patch
new file mode 100644
index 0000000..1da75ea
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0003-dt-bindings-mailbox-arm-mhuv2-Add-bindings.patch
@@ -0,0 +1,241 @@
+From cdda49168d42c897574388356555f8130c021bb5 Mon Sep 17 00:00:00 2001
+From: Viresh Kumar <viresh.kumar@linaro.org>
+Date: Tue, 17 Nov 2020 15:32:05 +0530
+Subject: [PATCH 03/22] dt-bindings: mailbox : arm,mhuv2: Add bindings
+
+This patch adds device tree binding for ARM Message Handling Unit (MHU)
+controller version 2.
+
+Based on earlier work by Morten Borup Petersen.
+
+Reviewed-by: Rob Herring <robh@kernel.org>
+Co-developed-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
+Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
+
+Upstream-Status: Backport [https://lkml.org/lkml/2020/11/17/234]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ .../bindings/mailbox/arm,mhuv2.yaml           | 209 ++++++++++++++++++
+ 1 file changed, 209 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml
+
+diff --git a/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml b/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml
+new file mode 100644
+index 000000000000..6608545ea66f
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml
+@@ -0,0 +1,209 @@
++# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mailbox/arm,mhuv2.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: ARM MHUv2 Mailbox Controller
++
++maintainers:
++  - Tushar Khandelwal <tushar.khandelwal@arm.com>
++  - Viresh Kumar <viresh.kumar@linaro.org>
++
++description: |
++  The Arm Message Handling Unit (MHU) Version 2 is a mailbox controller that has
++  between 1 and 124 channel windows (each 32-bit wide) to provide unidirectional
++  communication with remote processor(s), where the number of channel windows
++  are implementation dependent.
++
++  Given the unidirectional nature of the controller, an MHUv2 mailbox may only
++  be written to or read from. If a pair of MHU controllers is implemented
++  between two processing elements to provide bidirectional communication, these
++  must be specified as two separate mailboxes.
++
++  If the interrupts property is present in device tree node, then its treated as
++  a "receiver" mailbox, otherwise a "sender".
++
++  An MHU controller must be specified along with the supported transport
++  protocols. The transport protocols determine the method of data transmission
++  as well as the number of provided mailbox channels.
++
++  Following are the possible transport protocols.
++
++  - Data-transfer: Each transfer is made of one or more words, using one or more
++    channel windows.
++
++  - Doorbell: Each transfer is made up of single bit flag, using any one of the
++    bits in a channel window. A channel window can support up to 32 doorbells
++    and the entire window shall be used in doorbell protocol.  Optionally, data
++    may be transmitted through a shared memory region, wherein the MHU is used
++    strictly as an interrupt generation mechanism but that is out of the scope
++    of these bindings.
++
++# We need a select here so we don't match all nodes with 'arm,primecell'
++select:
++  properties:
++    compatible:
++      contains:
++        enum:
++          - arm,mhuv2-tx
++          - arm,mhuv2-rx
++  required:
++    - compatible
++
++properties:
++  compatible:
++    oneOf:
++      - description: Sender mode
++        items:
++          - const: arm,mhuv2-tx
++          - const: arm,primecell
++
++      - description: Receiver-mode
++        items:
++          - const: arm,mhuv2-rx
++          - const: arm,primecell
++
++  reg:
++    maxItems: 1
++
++  interrupts:
++    description: |
++      The MHUv2 controller always implements an interrupt in the "receiver"
++      mode, while the interrupt in the "sender" mode was not available in the
++      version MHUv2.0, but the later versions do have it.
++    maxItems: 1
++
++  clocks:
++    maxItems: 1
++
++  clock-names:
++    maxItems: 1
++
++  arm,mhuv2-protocols:
++    $ref: /schemas/types.yaml#/definitions/uint32-matrix
++    description: |
++      The MHUv2 controller may contain up to 124 channel windows (each 32-bit
++      wide). The hardware and the DT bindings allows any combination of those to
++      be used for various transport protocols.
++
++      This property allows a platform to describe how these channel windows are
++      used in various transport protocols. The entries in this property shall be
++      present as an array of tuples, where each tuple describes details about
++      one of the transport protocol being implemented over some channel
++      window(s).
++
++      The first field of a tuple signifies the transfer protocol, 0 is reserved
++      for doorbell protocol, and 1 is reserved for data-transfer protocol.
++      Using any other value in the first field of a tuple makes it invalid.
++
++      The second field of a tuple signifies the number of channel windows where
++      the protocol would be used and should be set to a non zero value. For
++      doorbell protocol this field signifies the number of 32-bit channel
++      windows that implement the doorbell protocol. For data-transfer protocol,
++      this field signifies the number of 32-bit channel windows that implement
++      the data-transfer protocol.
++
++      The total number of channel windows specified here shouldn't be more than
++      the ones implemented by the platform, though one can specify lesser number
++      of windows here than what the platform implements.
++
++      mhu: mailbox@2b1f0000 {
++          ...
++
++          arm,mhuv2-protocols = <0 2>, <1 1>, <1 5>, <1 7>;
++      }
++
++      The above example defines the protocols of an ARM MHUv2 mailbox
++      controller, where a total of 15 channel windows are used. The first two
++      windows are used in doorbell protocol (64 doorbells), followed by 1, 5 and
++      7 windows (separately) used in data-transfer protocol.
++
++    minItems: 1
++    maxItems: 124
++    items:
++      items:
++        - enum: [ 0, 1 ]
++        - minimum: 0
++          maximum: 124
++
++
++  '#mbox-cells':
++    description: |
++      It is always set to 2. The first argument in the consumers 'mboxes'
++      property represents the channel window group, which may be used in
++      doorbell, or data-transfer protocol, and the second argument (only
++      relevant in doorbell protocol, should be 0 otherwise) represents the
++      doorbell number within the 32 bit wide channel window.
++
++      From the example given above for arm,mhuv2-protocols, here is how a client
++      node can reference them.
++
++      mboxes = <&mhu 0 5>; // Channel Window Group 0, doorbell 5.
++      mboxes = <&mhu 1 7>; // Channel Window Group 1, doorbell 7.
++      mboxes = <&mhu 2 0>; // Channel Window Group 2, data transfer protocol with 1 window.
++      mboxes = <&mhu 3 0>; // Channel Window Group 3, data transfer protocol with 5 windows.
++      mboxes = <&mhu 4 0>; // Channel Window Group 4, data transfer protocol with 7 windows.
++
++    const: 2
++
++if:
++  # Interrupt is compulsory for receiver
++  properties:
++    compatible:
++      contains:
++        const: arm,mhuv2-rx
++then:
++  required:
++    - interrupts
++
++required:
++  - compatible
++  - reg
++  - '#mbox-cells'
++  - arm,mhuv2-protocols
++
++additionalProperties: false
++
++examples:
++  # Multiple transport protocols implemented by the mailbox controllers
++  - |
++    soc {
++        #address-cells = <2>;
++        #size-cells = <2>;
++
++        mhu_tx: mailbox@2b1f0000 {
++            #mbox-cells = <2>;
++            compatible = "arm,mhuv2-tx", "arm,primecell";
++            reg = <0 0x2b1f0000 0 0x1000>;
++            clocks = <&clock 0>;
++            clock-names = "apb_pclk";
++            interrupts = <0 45 4>;
++            arm,mhuv2-protocols = <1 5>, <1 2>, <1 5>, <1 7>, <0 2>;
++        };
++
++        mhu_rx: mailbox@2b1f1000 {
++            #mbox-cells = <2>;
++            compatible = "arm,mhuv2-rx", "arm,primecell";
++            reg = <0 0x2b1f1000 0 0x1000>;
++            clocks = <&clock 0>;
++            clock-names = "apb_pclk";
++            interrupts = <0 46 4>;
++            arm,mhuv2-protocols = <1 1>, <1 7>, <0 2>;
++        };
++
++        mhu_client: scb@2e000000 {
++            compatible = "fujitsu,mb86s70-scb-1.0";
++            reg = <0 0x2e000000 0 0x4000>;
++
++            mboxes =
++                     //data-transfer protocol with 5 windows, mhu-tx
++                     <&mhu_tx 2 0>,
++                     //data-transfer protocol with 7 windows, mhu-tx
++                     <&mhu_tx 3 0>,
++                     //doorbell protocol channel 4, doorbell 27, mhu-tx
++                     <&mhu_tx 4 27>,
++                     //data-transfer protocol with 1 window, mhu-rx
++                     <&mhu_rx 0 0>;
++        };
++    };
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0004-mailbox-arm_mhuv2-Add-driver.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0004-mailbox-arm_mhuv2-Add-driver.patch
new file mode 100644
index 0000000..a4dd961
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0004-mailbox-arm_mhuv2-Add-driver.patch
@@ -0,0 +1,1256 @@
+From eadd9235d084da8022df2d232c90590f2160e433 Mon Sep 17 00:00:00 2001
+From: Viresh Kumar <viresh.kumar@linaro.org>
+Date: Tue, 17 Nov 2020 15:32:06 +0530
+Subject: [PATCH 04/22] mailbox: arm_mhuv2: Add driver
+
+This adds driver for the ARM MHUv2 (Message Handling Unit) mailbox
+controller.
+
+This is based on the accepted DT bindings of the controller and supports
+combination of both transport protocols, i.e. doorbell and data-transfer.
+
+Transmitting and receiving data through the mailbox framework is done
+through struct arm_mhuv2_mbox_msg.
+
+Based on the initial work done by Morten Borup Petersen from ARM.
+
+Co-developed-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
+Tested-by: Usama Arif <usama.arif@arm.com>
+Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
+Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
+
+Upstream-Status: Backport [https://www.lkml.org/lkml/2020/11/17/235]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ MAINTAINERS                               |    9 +
+ drivers/mailbox/Kconfig                   |    7 +
+ drivers/mailbox/Makefile                  |    2 +
+ drivers/mailbox/arm_mhuv2.c               | 1136 +++++++++++++++++++++
+ include/linux/mailbox/arm_mhuv2_message.h |   20 +
+ 5 files changed, 1174 insertions(+)
+ create mode 100644 drivers/mailbox/arm_mhuv2.c
+ create mode 100644 include/linux/mailbox/arm_mhuv2_message.h
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 354831907474..5234423c477a 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -10459,6 +10459,15 @@ F:	drivers/mailbox/
+ F:	include/linux/mailbox_client.h
+ F:	include/linux/mailbox_controller.h
+ 
++MAILBOX ARM MHUv2
++M:	Viresh Kumar <viresh.kumar@linaro.org>
++M:	Tushar Khandelwal <Tushar.Khandelwal@arm.com>
++L:	linux-kernel@vger.kernel.org
++S:	Maintained
++F:	drivers/mailbox/arm_mhuv2.c
++F:	include/linux/mailbox/arm_mhuv2_message.h
++F:	Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml
++
+ MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
+ M:	Michael Kerrisk <mtk.manpages@gmail.com>
+ L:	linux-man@vger.kernel.org
+diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
+index 05b1009e2820..3c0ea96a0a8b 100644
+--- a/drivers/mailbox/Kconfig
++++ b/drivers/mailbox/Kconfig
+@@ -16,6 +16,13 @@ config ARM_MHU
+ 	  The controller has 3 mailbox channels, the last of which can be
+ 	  used in Secure mode only.
+ 
++config ARM_MHU_V2
++	tristate "ARM MHUv2 Mailbox"
++	depends on ARM_AMBA
++	help
++	  Say Y here if you want to build the ARM MHUv2 controller driver,
++	  which provides unidirectional mailboxes between processing elements.
++
+ config IMX_MBOX
+ 	tristate "i.MX Mailbox"
+ 	depends on ARCH_MXC || COMPILE_TEST
+diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile
+index 2e06e02b2e03..7194fa92c787 100644
+--- a/drivers/mailbox/Makefile
++++ b/drivers/mailbox/Makefile
+@@ -7,6 +7,8 @@ obj-$(CONFIG_MAILBOX_TEST)	+= mailbox-test.o
+ 
+ obj-$(CONFIG_ARM_MHU)	+= arm_mhu.o arm_mhu_db.o
+ 
++obj-$(CONFIG_ARM_MHU_V2)	+= arm_mhuv2.o
++
+ obj-$(CONFIG_IMX_MBOX)	+= imx-mailbox.o
+ 
+ obj-$(CONFIG_ARMADA_37XX_RWTM_MBOX)	+= armada-37xx-rwtm-mailbox.o
+diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
+new file mode 100644
+index 000000000000..67fb10885bb4
+--- /dev/null
++++ b/drivers/mailbox/arm_mhuv2.c
+@@ -0,0 +1,1136 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * ARM Message Handling Unit Version 2 (MHUv2) driver.
++ *
++ * Copyright (C) 2020 ARM Ltd.
++ * Copyright (C) 2020 Linaro Ltd.
++ *
++ * An MHUv2 mailbox controller can provide up to 124 channel windows (each 32
++ * bit long) and the driver allows any combination of both the transport
++ * protocol modes: data-transfer and doorbell, to be used on those channel
++ * windows.
++ *
++ * The transport protocols should be specified in the device tree entry for the
++ * device. The transport protocols determine how the underlying hardware
++ * resources of the device are utilized when transmitting data. Refer to the
++ * device tree bindings of the ARM MHUv2 controller for more details.
++ *
++ * The number of registered mailbox channels is dependent on both the underlying
++ * hardware - mainly the number of channel windows implemented by the platform,
++ * as well as the selected transport protocols.
++ *
++ * The MHUv2 controller can work both as a sender and receiver, but the driver
++ * and the DT bindings support unidirectional transfers for better allocation of
++ * the channels. That is, this driver will be probed for two separate devices
++ * for each mailbox controller, a sender device and a receiver device.
++ */
++
++#include <linux/amba/bus.h>
++#include <linux/interrupt.h>
++#include <linux/mailbox_controller.h>
++#include <linux/mailbox/arm_mhuv2_message.h>
++#include <linux/module.h>
++#include <linux/of_address.h>
++#include <linux/spinlock.h>
++
++/* ====== MHUv2 Registers ====== */
++
++/* Maximum number of channel windows */
++#define MHUV2_CH_WN_MAX			124
++/* Number of combined interrupt status registers */
++#define MHUV2_CMB_INT_ST_REG_CNT	4
++#define MHUV2_STAT_BYTES		(sizeof(u32))
++#define MHUV2_STAT_BITS			(MHUV2_STAT_BYTES * __CHAR_BIT__)
++
++#define LSB_MASK(n)			((1 << (n * __CHAR_BIT__)) - 1)
++#define MHUV2_PROTOCOL_PROP		"arm,mhuv2-protocols"
++
++/* Register Message Handling Unit Configuration fields */
++struct mhu_cfg_t {
++	u32 num_ch : 7;
++	u32 pad : 25;
++} __packed;
++
++/* register Interrupt Status fields */
++struct int_st_t {
++	u32 nr2r : 1;
++	u32 r2nr : 1;
++	u32 pad : 30;
++} __packed;
++
++/* Register Interrupt Clear fields */
++struct int_clr_t {
++	u32 nr2r : 1;
++	u32 r2nr : 1;
++	u32 pad : 30;
++} __packed;
++
++/* Register Interrupt Enable fields */
++struct int_en_t {
++	u32 r2nr : 1;
++	u32 nr2r : 1;
++	u32 chcomb : 1;
++	u32 pad : 29;
++} __packed;
++
++/* Register Implementer Identification fields */
++struct iidr_t {
++	u32 implementer : 12;
++	u32 revision : 4;
++	u32 variant : 4;
++	u32 product_id : 12;
++} __packed;
++
++/* Register Architecture Identification Register fields */
++struct aidr_t {
++	u32 arch_minor_rev : 4;
++	u32 arch_major_rev : 4;
++	u32 pad : 24;
++} __packed;
++
++/* Sender Channel Window fields */
++struct mhu2_send_ch_wn_reg {
++	u32 stat;
++	u8 pad1[0x0C - 0x04];
++	u32 stat_set;
++	u32 int_st;
++	u32 int_clr;
++	u32 int_en;
++	u8 pad2[0x20 - 0x1C];
++} __packed;
++
++/* Sender frame register fields */
++struct mhu2_send_frame_reg {
++	struct mhu2_send_ch_wn_reg ch_wn[MHUV2_CH_WN_MAX];
++	struct mhu_cfg_t mhu_cfg;
++	u32 resp_cfg;
++	u32 access_request;
++	u32 access_ready;
++	struct int_st_t int_st;
++	struct int_clr_t int_clr;
++	struct int_en_t int_en;
++	u32 reserved0;
++	u32 chcomb_int_st[MHUV2_CMB_INT_ST_REG_CNT];
++	u8 pad[0xFC8 - 0xFB0];
++	struct iidr_t iidr;
++	struct aidr_t aidr;
++} __packed;
++
++/* Receiver Channel Window fields */
++struct mhu2_recv_ch_wn_reg {
++	u32 stat;
++	u32 stat_masked;
++	u32 stat_clear;
++	u8 reserved0[0x10 - 0x0C];
++	u32 mask;
++	u32 mask_set;
++	u32 mask_clear;
++	u8 pad[0x20 - 0x1C];
++} __packed;
++
++/* Receiver frame register fields */
++struct mhu2_recv_frame_reg {
++	struct mhu2_recv_ch_wn_reg ch_wn[MHUV2_CH_WN_MAX];
++	struct mhu_cfg_t mhu_cfg;
++	u8 reserved0[0xF90 - 0xF84];
++	struct int_st_t int_st;
++	struct int_clr_t int_clr;
++	struct int_en_t int_en;
++	u32 pad;
++	u32 chcomb_int_st[MHUV2_CMB_INT_ST_REG_CNT];
++	u8 reserved2[0xFC8 - 0xFB0];
++	struct iidr_t iidr;
++	struct aidr_t aidr;
++} __packed;
++
++
++/* ====== MHUv2 data structures ====== */
++
++enum mhuv2_transport_protocol {
++	DOORBELL = 0,
++	DATA_TRANSFER = 1
++};
++
++enum mhuv2_frame {
++	RECEIVER_FRAME,
++	SENDER_FRAME
++};
++
++/**
++ * struct mhuv2 - MHUv2 mailbox controller data
++ *
++ * @mbox:	Mailbox controller belonging to the MHU frame.
++ * @send/recv:	Base address of the register mapping region.
++ * @frame:	Frame type: RECEIVER_FRAME or SENDER_FRAME.
++ * @irq:	Interrupt.
++ * @windows:	Channel windows implemented by the platform.
++ * @minor:	Minor version of the controller.
++ * @length:	Length of the protocols array in bytes.
++ * @protocols:	Raw protocol information, derived from device tree.
++ * @doorbell_pending_lock: spinlock required for correct operation of Tx
++ *		interrupt for doorbells.
++ */
++struct mhuv2 {
++	struct mbox_controller mbox;
++	union {
++		struct mhu2_send_frame_reg __iomem *send;
++		struct mhu2_recv_frame_reg __iomem *recv;
++	};
++	enum mhuv2_frame frame;
++	unsigned int irq;
++	unsigned int windows;
++	unsigned int minor;
++	unsigned int length;
++	u32 *protocols;
++
++	spinlock_t doorbell_pending_lock;
++};
++
++#define mhu_from_mbox(_mbox) container_of(_mbox, struct mhuv2, mbox)
++
++/**
++ * struct mhuv2_protocol_ops - MHUv2 operations
++ *
++ * Each transport protocol must provide an implementation of the operations
++ * provided here.
++ *
++ * @rx_startup: Startup callback for receiver.
++ * @rx_shutdown: Shutdown callback for receiver.
++ * @read_data: Reads and clears newly available data.
++ * @tx_startup: Startup callback for receiver.
++ * @tx_shutdown: Shutdown callback for receiver.
++ * @last_tx_done: Report back if the last tx is completed or not.
++ * @send_data: Send data to the receiver.
++ */
++struct mhuv2_protocol_ops {
++	int (*rx_startup)(struct mhuv2 *mhu, struct mbox_chan *chan);
++	void (*rx_shutdown)(struct mhuv2 *mhu, struct mbox_chan *chan);
++	void *(*read_data)(struct mhuv2 *mhu, struct mbox_chan *chan);
++
++	void (*tx_startup)(struct mhuv2 *mhu, struct mbox_chan *chan);
++	void (*tx_shutdown)(struct mhuv2 *mhu, struct mbox_chan *chan);
++	int (*last_tx_done)(struct mhuv2 *mhu, struct mbox_chan *chan);
++	int (*send_data)(struct mhuv2 *mhu, struct mbox_chan *chan, void *arg);
++};
++
++/*
++ * MHUv2 mailbox channel's private information
++ *
++ * @ops:	protocol specific ops for the channel.
++ * @ch_wn_idx:	Channel window index allocated to the channel.
++ * @windows:	Total number of windows consumed by the channel, only relevant
++ *		in DATA_TRANSFER protocol.
++ * @doorbell:	Doorbell bit number within the ch_wn_idx window, only relevant
++ *		in DOORBELL protocol.
++ * @pending:	Flag indicating pending doorbell interrupt, only relevant in
++ *		DOORBELL protocol.
++ */
++struct mhuv2_mbox_chan_priv {
++	const struct mhuv2_protocol_ops *ops;
++	u32 ch_wn_idx;
++	union {
++		u32 windows;
++		struct {
++			u32 doorbell;
++			u32 pending;
++		};
++	};
++};
++
++/* Macro for reading a bitfield within a physically mapped packed struct */
++#define readl_relaxed_bitfield(_regptr, _field)				\
++	({								\
++		u32 _regval;						\
++		_regval = readl_relaxed((_regptr));			\
++		(*(typeof((_regptr)))(&_regval))._field;		\
++	})
++
++/* Macro for writing a bitfield within a physically mapped packed struct */
++#define writel_relaxed_bitfield(_value, _regptr, _field)		\
++	({								\
++		u32 _regval;						\
++		_regval = readl_relaxed(_regptr);			\
++		(*(typeof(_regptr))(&_regval))._field = _value;		\
++		writel_relaxed(_regval, _regptr);			\
++	})
++
++
++/* =================== Doorbell transport protocol operations =============== */
++
++static int mhuv2_doorbell_rx_startup(struct mhuv2 *mhu, struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	writel_relaxed(BIT(priv->doorbell),
++		       &mhu->recv->ch_wn[priv->ch_wn_idx].mask_clear);
++	return 0;
++}
++
++static void mhuv2_doorbell_rx_shutdown(struct mhuv2 *mhu,
++				       struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	writel_relaxed(BIT(priv->doorbell),
++		       &mhu->recv->ch_wn[priv->ch_wn_idx].mask_set);
++}
++
++static void *mhuv2_doorbell_read_data(struct mhuv2 *mhu, struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	writel_relaxed(BIT(priv->doorbell),
++		       &mhu->recv->ch_wn[priv->ch_wn_idx].stat_clear);
++	return NULL;
++}
++
++static int mhuv2_doorbell_last_tx_done(struct mhuv2 *mhu,
++				       struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	return !(readl_relaxed(&mhu->send->ch_wn[priv->ch_wn_idx].stat) &
++		 BIT(priv->doorbell));
++}
++
++static int mhuv2_doorbell_send_data(struct mhuv2 *mhu, struct mbox_chan *chan,
++				    void *arg)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	unsigned long flags;
++
++	spin_lock_irqsave(&mhu->doorbell_pending_lock, flags);
++
++	priv->pending = 1;
++	writel_relaxed(BIT(priv->doorbell),
++		       &mhu->send->ch_wn[priv->ch_wn_idx].stat_set);
++
++	spin_unlock_irqrestore(&mhu->doorbell_pending_lock, flags);
++
++	return 0;
++}
++
++static const struct mhuv2_protocol_ops mhuv2_doorbell_ops = {
++	.rx_startup = mhuv2_doorbell_rx_startup,
++	.rx_shutdown = mhuv2_doorbell_rx_shutdown,
++	.read_data = mhuv2_doorbell_read_data,
++	.last_tx_done = mhuv2_doorbell_last_tx_done,
++	.send_data = mhuv2_doorbell_send_data,
++};
++#define IS_PROTOCOL_DOORBELL(_priv) (_priv->ops == &mhuv2_doorbell_ops)
++
++/* ============= Data transfer transport protocol operations ================ */
++
++static int mhuv2_data_transfer_rx_startup(struct mhuv2 *mhu,
++					  struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int i = priv->ch_wn_idx + priv->windows - 1;
++
++	/*
++	 * The protocol mandates that all but the last status register must be
++	 * masked.
++	 */
++	writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[i].mask_clear);
++	return 0;
++}
++
++static void mhuv2_data_transfer_rx_shutdown(struct mhuv2 *mhu,
++					    struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int i = priv->ch_wn_idx + priv->windows - 1;
++
++	writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[i].mask_set);
++}
++
++static void *mhuv2_data_transfer_read_data(struct mhuv2 *mhu,
++					   struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	const int windows = priv->windows;
++	struct arm_mhuv2_mbox_msg *msg;
++	u32 *data;
++	int i, idx;
++
++	msg = kzalloc(sizeof(*msg) + windows * MHUV2_STAT_BYTES, GFP_KERNEL);
++	if (!msg)
++		return ERR_PTR(-ENOMEM);
++
++	data = msg->data = msg + 1;
++	msg->len = windows * MHUV2_STAT_BYTES;
++
++	/*
++	 * Messages are expected in order of most significant word to least
++	 * significant word. Refer mhuv2_data_transfer_send_data() for more
++	 * details.
++	 *
++	 * We also need to read the stat register instead of stat_masked, as we
++	 * masked all but the last window.
++	 *
++	 * Last channel window must be cleared as the final operation. Upon
++	 * clearing the last channel window register, which is unmasked in
++	 * data-transfer protocol, the interrupt is de-asserted.
++	 */
++	for (i = 0; i < windows; i++) {
++		idx = priv->ch_wn_idx + i;
++		data[windows - 1 - i] = readl_relaxed(&mhu->recv->ch_wn[idx].stat);
++		writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[idx].stat_clear);
++	}
++
++	return msg;
++}
++
++static void mhuv2_data_transfer_tx_startup(struct mhuv2 *mhu,
++					   struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int i = priv->ch_wn_idx + priv->windows - 1;
++
++	/* Enable interrupts only for the last window */
++	if (mhu->minor) {
++		writel_relaxed(0x1, &mhu->send->ch_wn[i].int_clr);
++		writel_relaxed(0x1, &mhu->send->ch_wn[i].int_en);
++	}
++}
++
++static void mhuv2_data_transfer_tx_shutdown(struct mhuv2 *mhu,
++					    struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int i = priv->ch_wn_idx + priv->windows - 1;
++
++	if (mhu->minor)
++		writel_relaxed(0x0, &mhu->send->ch_wn[i].int_en);
++}
++
++static int mhuv2_data_transfer_last_tx_done(struct mhuv2 *mhu,
++					    struct mbox_chan *chan)
++{
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int i = priv->ch_wn_idx + priv->windows - 1;
++
++	/* Just checking the last channel window should be enough */
++	return !readl_relaxed(&mhu->send->ch_wn[i].stat);
++}
++
++/*
++ * Message will be transmitted from most significant to least significant word.
++ * This is to allow for messages shorter than channel windows to still trigger
++ * the receiver interrupt which gets activated when the last stat register is
++ * written. As an example, a 6-word message is to be written on a 4-channel MHU
++ * connection: Registers marked with '*' are masked, and will not generate an
++ * interrupt on the receiver side once written.
++ *
++ * u32 *data =	[0x00000001], [0x00000002], [0x00000003], [0x00000004],
++ *		[0x00000005], [0x00000006]
++ *
++ * ROUND 1:
++ * stat reg		To write	Write sequence
++ * [ stat 3 ]	<-	[0x00000001]	4 <- triggers interrupt on receiver
++ * [ stat 2 ]	<-	[0x00000002]	3
++ * [ stat 1 ]	<-	[0x00000003]	2
++ * [ stat 0 ]	<-	[0x00000004]	1
++ *
++ * data += 4 // Increment data pointer by number of stat regs
++ *
++ * ROUND 2:
++ * stat reg		To write	Write sequence
++ * [ stat 3 ]	<-	[0x00000005]	2 <- triggers interrupt on receiver
++ * [ stat 2 ]	<-	[0x00000006]	1
++ * [ stat 1 ]	<-	[0x00000000]
++ * [ stat 0 ]	<-	[0x00000000]
++ */
++static int mhuv2_data_transfer_send_data(struct mhuv2 *mhu,
++					 struct mbox_chan *chan, void *arg)
++{
++	const struct arm_mhuv2_mbox_msg *msg = arg;
++	int bytes_left = msg->len, bytes_to_send, bytes_in_round, i;
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++	int windows = priv->windows;
++	u32 *data = msg->data, word;
++
++	while (bytes_left) {
++		if (!data[0]) {
++			dev_err(mhu->mbox.dev, "Data aligned at first window can't be zero to guarantee interrupt generation at receiver");
++			return -EINVAL;
++		}
++
++		while(!mhuv2_data_transfer_last_tx_done(mhu, chan))
++			continue;
++
++		bytes_in_round = min(bytes_left, (int)(windows * MHUV2_STAT_BYTES));
++
++		for (i = windows - 1; i >= 0; i--) {
++			/* Data less than windows can transfer ? */
++			if (unlikely(bytes_in_round <= i * MHUV2_STAT_BYTES))
++				continue;
++
++			word = data[i];
++			bytes_to_send = bytes_in_round & (MHUV2_STAT_BYTES - 1);
++			if (unlikely(bytes_to_send))
++				word &= LSB_MASK(bytes_to_send);
++			else
++				bytes_to_send = MHUV2_STAT_BYTES;
++
++			writel_relaxed(word, &mhu->send->ch_wn[priv->ch_wn_idx + windows - 1 - i].stat_set);
++			bytes_left -= bytes_to_send;
++			bytes_in_round -= bytes_to_send;
++		}
++
++		data += windows;
++	}
++
++	return 0;
++}
++
++static const struct mhuv2_protocol_ops mhuv2_data_transfer_ops = {
++	.rx_startup = mhuv2_data_transfer_rx_startup,
++	.rx_shutdown = mhuv2_data_transfer_rx_shutdown,
++	.read_data = mhuv2_data_transfer_read_data,
++	.tx_startup = mhuv2_data_transfer_tx_startup,
++	.tx_shutdown = mhuv2_data_transfer_tx_shutdown,
++	.last_tx_done = mhuv2_data_transfer_last_tx_done,
++	.send_data = mhuv2_data_transfer_send_data,
++};
++
++/* Interrupt handlers */
++
++static struct mbox_chan *get_irq_chan_comb(struct mhuv2 *mhu, u32 *reg)
++{
++	struct mbox_chan *chans = mhu->mbox.chans;
++	int channel = 0, i, offset = 0, windows, protocol, ch_wn;
++	u32 stat;
++
++	for (i = 0; i < MHUV2_CMB_INT_ST_REG_CNT; i++) {
++		stat = readl_relaxed(reg + i);
++		if (!stat)
++			continue;
++
++		ch_wn = i * MHUV2_STAT_BITS + __builtin_ctz(stat);
++
++		for (i = 0; i < mhu->length; i += 2) {
++			protocol = mhu->protocols[i];
++			windows = mhu->protocols[i + 1];
++
++			if (ch_wn >= offset + windows) {
++				if (protocol == DOORBELL)
++					channel += MHUV2_STAT_BITS * windows;
++				else
++					channel++;
++
++				offset += windows;
++				continue;
++			}
++
++			/* Return first chan of the window in doorbell mode */
++			if (protocol == DOORBELL)
++				channel += MHUV2_STAT_BITS * (ch_wn - offset);
++
++			return &chans[channel];
++		}
++	}
++
++	return ERR_PTR(-EIO);
++}
++
++static irqreturn_t mhuv2_sender_interrupt(int irq, void *data)
++{
++	struct mhuv2 *mhu = data;
++	struct device *dev = mhu->mbox.dev;
++	struct mhuv2_mbox_chan_priv *priv;
++	struct mbox_chan *chan;
++	unsigned long flags;
++	int i, found = 0;
++	u32 stat;
++
++	chan = get_irq_chan_comb(mhu, mhu->send->chcomb_int_st);
++	if (IS_ERR(chan)) {
++		dev_warn(dev, "Failed to find channel for the Tx interrupt\n");
++		return IRQ_NONE;
++	}
++	priv = chan->con_priv;
++
++	if (!IS_PROTOCOL_DOORBELL(priv)) {
++		writel_relaxed(1, &mhu->send->ch_wn[priv->ch_wn_idx + priv->windows - 1].int_clr);
++
++		if (chan->cl) {
++			mbox_chan_txdone(chan, 0);
++			return IRQ_HANDLED;
++		}
++
++		dev_warn(dev, "Tx interrupt Received on channel (%u) not currently attached to a mailbox client\n",
++			 priv->ch_wn_idx);
++		return IRQ_NONE;
++	}
++
++	/* Clear the interrupt first, so we don't miss any doorbell later */
++	writel_relaxed(1, &mhu->send->ch_wn[priv->ch_wn_idx].int_clr);
++
++	/*
++	 * In Doorbell mode, make sure no new transitions happen while the
++	 * interrupt handler is trying to find the finished doorbell tx
++	 * operations, else we may think few of the transfers were complete
++	 * before they actually were.
++	 */
++	spin_lock_irqsave(&mhu->doorbell_pending_lock, flags);
++
++	/*
++	 * In case of doorbell mode, the first channel of the window is returned
++	 * by get_irq_chan_comb(). Find all the pending channels here.
++	 */
++	stat = readl_relaxed(&mhu->send->ch_wn[priv->ch_wn_idx].stat);
++
++	for (i = 0; i < MHUV2_STAT_BITS; i++) {
++		priv = chan[i].con_priv;
++
++		/* Find cases where pending was 1, but stat's bit is cleared */
++		if (priv->pending ^ ((stat >> i) & 0x1)) {
++			BUG_ON(!priv->pending);
++
++			if (!chan->cl) {
++				dev_warn(dev, "Tx interrupt received on doorbell (%u : %u) channel not currently attached to a mailbox client\n",
++					 priv->ch_wn_idx, i);
++				continue;
++			}
++
++			mbox_chan_txdone(&chan[i], 0);
++			priv->pending = 0;
++			found++;
++		}
++	}
++
++	spin_unlock_irqrestore(&mhu->doorbell_pending_lock, flags);
++
++	if (!found) {
++		/*
++		 * We may have already processed the doorbell in the previous
++		 * iteration if the interrupt came right after we cleared it but
++		 * before we read the stat register.
++		 */
++		dev_dbg(dev, "Couldn't find the doorbell (%u) for the Tx interrupt interrupt\n",
++			priv->ch_wn_idx);
++		return IRQ_NONE;
++	}
++
++	return IRQ_HANDLED;
++}
++
++static struct mbox_chan *get_irq_chan_comb_rx(struct mhuv2 *mhu)
++{
++	struct mhuv2_mbox_chan_priv *priv;
++	struct mbox_chan *chan;
++	u32 stat;
++
++	chan = get_irq_chan_comb(mhu, mhu->recv->chcomb_int_st);
++	if (IS_ERR(chan))
++		return chan;
++
++	priv = chan->con_priv;
++	if (!IS_PROTOCOL_DOORBELL(priv))
++		return chan;
++
++	/*
++	 * In case of doorbell mode, the first channel of the window is returned
++	 * by the routine. Find the exact channel here.
++	 */
++	stat = readl_relaxed(&mhu->recv->ch_wn[priv->ch_wn_idx].stat_masked);
++	BUG_ON(!stat);
++
++	return chan + __builtin_ctz(stat);
++}
++
++static struct mbox_chan *get_irq_chan_stat_rx(struct mhuv2 *mhu)
++{
++	struct mbox_chan *chans = mhu->mbox.chans;
++	struct mhuv2_mbox_chan_priv *priv;
++	u32 stat;
++	int i = 0;
++
++	while (i < mhu->mbox.num_chans) {
++		priv = chans[i].con_priv;
++		stat = readl_relaxed(&mhu->recv->ch_wn[priv->ch_wn_idx].stat_masked);
++
++		if (stat) {
++			if (IS_PROTOCOL_DOORBELL(priv))
++				i += __builtin_ctz(stat);
++			return &chans[i];
++		}
++
++		i += IS_PROTOCOL_DOORBELL(priv) ? MHUV2_STAT_BITS : 1;
++	}
++
++	return ERR_PTR(-EIO);
++}
++
++static struct mbox_chan *get_irq_chan_rx(struct mhuv2 *mhu)
++{
++	if (!mhu->minor)
++		return get_irq_chan_stat_rx(mhu);
++
++	return get_irq_chan_comb_rx(mhu);
++}
++
++static irqreturn_t mhuv2_receiver_interrupt(int irq, void *arg)
++{
++	struct mhuv2 *mhu = arg;
++	struct mbox_chan *chan = get_irq_chan_rx(mhu);
++	struct device *dev = mhu->mbox.dev;
++	struct mhuv2_mbox_chan_priv *priv;
++	int ret = IRQ_NONE;
++	void *data;
++
++	if (IS_ERR(chan)) {
++		dev_warn(dev, "Failed to find channel for the rx interrupt\n");
++		return IRQ_NONE;
++	}
++	priv = chan->con_priv;
++
++	/* Read and clear the data first */
++	data = priv->ops->read_data(mhu, chan);
++
++	if (!chan->cl) {
++		dev_warn(dev, "Received data on channel (%u) not currently attached to a mailbox client\n",
++			 priv->ch_wn_idx);
++	} else if (IS_ERR(data)) {
++		dev_err(dev, "Failed to read data: %lu\n", PTR_ERR(data));
++	} else {
++		mbox_chan_received_data(chan, data);
++		ret = IRQ_HANDLED;
++	}
++
++	kfree(data);
++	return ret;
++}
++
++/* Sender and receiver ops */
++static bool mhuv2_sender_last_tx_done(struct mbox_chan *chan)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	return priv->ops->last_tx_done(mhu, chan);
++}
++
++static int mhuv2_sender_send_data(struct mbox_chan *chan, void *data)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	if (!priv->ops->last_tx_done(mhu, chan))
++		return -EBUSY;
++
++	return priv->ops->send_data(mhu, chan, data);
++}
++
++static int mhuv2_sender_startup(struct mbox_chan *chan)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	if (priv->ops->tx_startup)
++		priv->ops->tx_startup(mhu, chan);
++	return 0;
++}
++
++static void mhuv2_sender_shutdown(struct mbox_chan *chan)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	if (priv->ops->tx_shutdown)
++		priv->ops->tx_shutdown(mhu, chan);
++}
++
++static const struct mbox_chan_ops mhuv2_sender_ops = {
++	.send_data = mhuv2_sender_send_data,
++	.startup = mhuv2_sender_startup,
++	.shutdown = mhuv2_sender_shutdown,
++	.last_tx_done = mhuv2_sender_last_tx_done,
++};
++
++static int mhuv2_receiver_startup(struct mbox_chan *chan)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	return priv->ops->rx_startup(mhu, chan);
++}
++
++static void mhuv2_receiver_shutdown(struct mbox_chan *chan)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(chan->mbox);
++	struct mhuv2_mbox_chan_priv *priv = chan->con_priv;
++
++	priv->ops->rx_shutdown(mhu, chan);
++}
++
++static int mhuv2_receiver_send_data(struct mbox_chan *chan, void *data)
++{
++	dev_err(chan->mbox->dev,
++		"Trying to transmit on a receiver MHU frame\n");
++	return -EIO;
++}
++
++static bool mhuv2_receiver_last_tx_done(struct mbox_chan *chan)
++{
++	dev_err(chan->mbox->dev, "Trying to Tx poll on a receiver MHU frame\n");
++	return true;
++}
++
++static const struct mbox_chan_ops mhuv2_receiver_ops = {
++	.send_data = mhuv2_receiver_send_data,
++	.startup = mhuv2_receiver_startup,
++	.shutdown = mhuv2_receiver_shutdown,
++	.last_tx_done = mhuv2_receiver_last_tx_done,
++};
++
++static struct mbox_chan *mhuv2_mbox_of_xlate(struct mbox_controller *mbox,
++					     const struct of_phandle_args *pa)
++{
++	struct mhuv2 *mhu = mhu_from_mbox(mbox);
++	struct mbox_chan *chans = mbox->chans;
++	int channel = 0, i, offset, doorbell, protocol, windows;
++
++	if (pa->args_count != 2)
++		return ERR_PTR(-EINVAL);
++
++	offset = pa->args[0];
++	doorbell = pa->args[1];
++	if (doorbell >= MHUV2_STAT_BITS)
++		goto out;
++
++	for (i = 0; i < mhu->length; i += 2) {
++		protocol = mhu->protocols[i];
++		windows = mhu->protocols[i + 1];
++
++		if (protocol == DOORBELL) {
++			if (offset < windows)
++				return &chans[channel + MHUV2_STAT_BITS * offset + doorbell];
++
++			channel += MHUV2_STAT_BITS * windows;
++			offset -= windows;
++		} else {
++			if (offset == 0) {
++				if (doorbell)
++					goto out;
++
++				return &chans[channel];
++			}
++
++			channel++;
++			offset--;
++		}
++	}
++
++out:
++	dev_err(mbox->dev, "Couldn't xlate to a valid channel (%d: %d)\n",
++		pa->args[0], doorbell);
++	return ERR_PTR(-ENODEV);
++}
++
++static int mhuv2_verify_protocol(struct mhuv2 *mhu)
++{
++	struct device *dev = mhu->mbox.dev;
++	int protocol, windows, channels = 0, total_windows = 0, i;
++
++	for (i = 0; i < mhu->length; i += 2) {
++		protocol = mhu->protocols[i];
++		windows = mhu->protocols[i + 1];
++
++		if (!windows) {
++			dev_err(dev, "Window size can't be zero (%d)\n", i);
++			return -EINVAL;
++		}
++		total_windows += windows;
++
++		if (protocol == DOORBELL) {
++			channels += MHUV2_STAT_BITS * windows;
++		} else if (protocol == DATA_TRANSFER) {
++			channels++;
++		} else {
++			dev_err(dev, "Invalid protocol (%d) present in %s property at index %d\n",
++				protocol, MHUV2_PROTOCOL_PROP, i);
++			return -EINVAL;
++		}
++	}
++
++	if (total_windows > mhu->windows) {
++		dev_err(dev, "Channel windows can't be more than what's implemented by the hardware ( %d: %d)\n",
++			total_windows, mhu->windows);
++		return -EINVAL;
++	}
++
++	mhu->mbox.num_chans = channels;
++	return 0;
++}
++
++static int mhuv2_allocate_channels(struct mhuv2 *mhu)
++{
++	struct mbox_controller *mbox = &mhu->mbox;
++	struct mhuv2_mbox_chan_priv *priv;
++	struct device *dev = mbox->dev;
++	struct mbox_chan *chans;
++	int protocol, windows = 0, next_window = 0, i, j, k;
++
++	chans = devm_kcalloc(dev, mbox->num_chans, sizeof(*chans), GFP_KERNEL);
++	if (!chans)
++		return -ENOMEM;
++
++	mbox->chans = chans;
++
++	for (i = 0; i < mhu->length; i += 2) {
++		next_window += windows;
++
++		protocol = mhu->protocols[i];
++		windows = mhu->protocols[i + 1];
++
++		if (protocol == DATA_TRANSFER) {
++			priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
++			if (!priv)
++				return -ENOMEM;
++
++			priv->ch_wn_idx = next_window;
++			priv->ops = &mhuv2_data_transfer_ops;
++			priv->windows = windows;
++			chans++->con_priv = priv;
++			continue;
++		}
++
++		for (j = 0; j < windows; j++) {
++			for (k = 0; k < MHUV2_STAT_BITS; k++) {
++				priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
++				if (!priv)
++					return -ENOMEM;
++
++				priv->ch_wn_idx = next_window + j;
++				priv->ops = &mhuv2_doorbell_ops;
++				priv->doorbell = k;
++				chans++->con_priv = priv;
++			}
++
++			/*
++			 * Permanently enable interrupt as we can't
++			 * control it per doorbell.
++			 */
++			if (mhu->frame == SENDER_FRAME && mhu->minor)
++				writel_relaxed(0x1, &mhu->send->ch_wn[priv->ch_wn_idx].int_en);
++		}
++	}
++
++	/* Make sure we have initialized all channels */
++	BUG_ON(chans - mbox->chans != mbox->num_chans);
++
++	return 0;
++}
++
++static int mhuv2_parse_channels(struct mhuv2 *mhu)
++{
++	struct device *dev = mhu->mbox.dev;
++	const struct device_node *np = dev->of_node;
++	int ret, count;
++	u32 *protocols;
++
++	count = of_property_count_u32_elems(np, MHUV2_PROTOCOL_PROP);
++	if (count <= 0 || count % 2) {
++		dev_err(dev, "Invalid %s property (%d)\n", MHUV2_PROTOCOL_PROP,
++			count);
++		return -EINVAL;
++	}
++
++	protocols = devm_kmalloc_array(dev, count, sizeof(*protocols), GFP_KERNEL);
++	if (!protocols)
++		return -ENOMEM;
++
++	ret = of_property_read_u32_array(np, MHUV2_PROTOCOL_PROP, protocols, count);
++	if (ret) {
++		dev_err(dev, "Failed to read %s property: %d\n",
++			MHUV2_PROTOCOL_PROP, ret);
++		return ret;
++	}
++
++	mhu->protocols = protocols;
++	mhu->length = count;
++
++	ret = mhuv2_verify_protocol(mhu);
++	if (ret)
++		return ret;
++
++	return mhuv2_allocate_channels(mhu);
++}
++
++static int mhuv2_tx_init(struct amba_device *adev, struct mhuv2 *mhu,
++			 void __iomem *reg)
++{
++	struct device *dev = mhu->mbox.dev;
++	int ret, i;
++
++	mhu->frame = SENDER_FRAME;
++	mhu->mbox.ops = &mhuv2_sender_ops;
++	mhu->send = reg;
++
++	mhu->windows = readl_relaxed_bitfield(&mhu->send->mhu_cfg, num_ch);
++	mhu->minor = readl_relaxed_bitfield(&mhu->send->aidr, arch_minor_rev);
++
++	spin_lock_init(&mhu->doorbell_pending_lock);
++
++	/*
++	 * For minor version 1 and forward, tx interrupt is provided by
++	 * the controller.
++	 */
++	if (mhu->minor && adev->irq[0]) {
++		ret = devm_request_threaded_irq(dev, adev->irq[0], NULL,
++						mhuv2_sender_interrupt,
++						IRQF_ONESHOT, "mhuv2-tx", mhu);
++		if (ret) {
++			dev_err(dev, "Failed to request tx IRQ, fallback to polling mode: %d\n",
++				ret);
++		} else {
++			mhu->mbox.txdone_irq = true;
++			mhu->mbox.txdone_poll = false;
++			mhu->irq = adev->irq[0];
++
++			writel_relaxed_bitfield(1, &mhu->send->int_en, chcomb);
++
++			/* Disable all channel interrupts */
++			for (i = 0; i < mhu->windows; i++)
++				writel_relaxed(0x0, &mhu->send->ch_wn[i].int_en);
++
++			goto out;
++		}
++	}
++
++	mhu->mbox.txdone_irq = false;
++	mhu->mbox.txdone_poll = true;
++	mhu->mbox.txpoll_period = 1;
++
++out:
++	/* Wait for receiver to be ready */
++	writel_relaxed(0x1, &mhu->send->access_request);
++	while (!readl_relaxed(&mhu->send->access_ready))
++		continue;
++
++	return 0;
++}
++
++static int mhuv2_rx_init(struct amba_device *adev, struct mhuv2 *mhu,
++			 void __iomem *reg)
++{
++	struct device *dev = mhu->mbox.dev;
++	int ret, i;
++
++	mhu->frame = RECEIVER_FRAME;
++	mhu->mbox.ops = &mhuv2_receiver_ops;
++	mhu->recv = reg;
++
++	mhu->windows = readl_relaxed_bitfield(&mhu->recv->mhu_cfg, num_ch);
++	mhu->minor = readl_relaxed_bitfield(&mhu->recv->aidr, arch_minor_rev);
++
++	mhu->irq = adev->irq[0];
++	if (!mhu->irq) {
++		dev_err(dev, "Missing receiver IRQ\n");
++		return -EINVAL;
++	}
++
++	ret = devm_request_threaded_irq(dev, mhu->irq, NULL,
++					mhuv2_receiver_interrupt, IRQF_ONESHOT,
++					"mhuv2-rx", mhu);
++	if (ret) {
++		dev_err(dev, "Failed to request rx IRQ\n");
++		return ret;
++	}
++
++	/* Mask all the channel windows */
++	for (i = 0; i < mhu->windows; i++)
++		writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[i].mask_set);
++
++	if (mhu->minor)
++		writel_relaxed_bitfield(1, &mhu->recv->int_en, chcomb);
++
++	return 0;
++}
++
++static int mhuv2_probe(struct amba_device *adev, const struct amba_id *id)
++{
++	struct device *dev = &adev->dev;
++	const struct device_node *np = dev->of_node;
++	struct mhuv2 *mhu;
++	void __iomem *reg;
++	int ret = -EINVAL;
++
++	reg = devm_of_iomap(dev, dev->of_node, 0, NULL);
++	if (!reg)
++		return -ENOMEM;
++
++	mhu = devm_kzalloc(dev, sizeof(*mhu), GFP_KERNEL);
++	if (!mhu)
++		return -ENOMEM;
++
++	mhu->mbox.dev = dev;
++	mhu->mbox.of_xlate = mhuv2_mbox_of_xlate;
++
++	if (of_device_is_compatible(np, "arm,mhuv2-tx"))
++		ret = mhuv2_tx_init(adev, mhu, reg);
++	else if (of_device_is_compatible(np, "arm,mhuv2-rx"))
++		ret = mhuv2_rx_init(adev, mhu, reg);
++	else
++		dev_err(dev, "Invalid compatible property\n");
++
++	if (ret)
++		return ret;
++
++	/* Channel windows can't be 0 */
++	BUG_ON(!mhu->windows);
++
++	ret = mhuv2_parse_channels(mhu);
++	if (ret)
++		return ret;
++
++	amba_set_drvdata(adev, mhu);
++
++	ret = devm_mbox_controller_register(dev, &mhu->mbox);
++	if (ret)
++		dev_err(dev, "failed to register ARM MHUv2 driver %d\n", ret);
++
++	return ret;
++}
++
++static int mhuv2_remove(struct amba_device *adev)
++{
++	struct mhuv2 *mhu = amba_get_drvdata(adev);
++
++	if (mhu->frame == SENDER_FRAME)
++		writel_relaxed(0x0, &mhu->send->access_request);
++
++	return 0;
++}
++
++static struct amba_id mhuv2_ids[] = {
++	{
++		/* 2.0 */
++		.id = 0xbb0d1,
++		.mask = 0xfffff,
++	},
++	{
++		/* 2.1 */
++		.id = 0xbb076,
++		.mask = 0xfffff,
++	},
++	{ 0, 0 },
++};
++MODULE_DEVICE_TABLE(amba, mhuv2_ids);
++
++static struct amba_driver mhuv2_driver = {
++	.drv = {
++		.name	= "arm-mhuv2",
++	},
++	.id_table	= mhuv2_ids,
++	.probe		= mhuv2_probe,
++	.remove		= mhuv2_remove,
++};
++module_amba_driver(mhuv2_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("ARM MHUv2 Driver");
++MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
++MODULE_AUTHOR("Tushar Khandelwal <tushar.khandelwal@arm.com>");
+diff --git a/include/linux/mailbox/arm_mhuv2_message.h b/include/linux/mailbox/arm_mhuv2_message.h
+new file mode 100644
+index 000000000000..821b9d96daa4
+--- /dev/null
++++ b/include/linux/mailbox/arm_mhuv2_message.h
+@@ -0,0 +1,20 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * ARM MHUv2 Mailbox Message
++ *
++ * Copyright (C) 2020 Arm Ltd.
++ * Copyright (C) 2020 Linaro Ltd.
++ */
++
++#ifndef _LINUX_ARM_MHUV2_MESSAGE_H_
++#define _LINUX_ARM_MHUV2_MESSAGE_H_
++
++#include <linux/types.h>
++
++/* Data structure for data-transfer protocol */
++struct arm_mhuv2_mbox_msg {
++	void *data;
++	size_t len;
++};
++
++#endif /* _LINUX_ARM_MHUV2_MESSAGE_H_ */
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0005-mailbox-arm_mhuv2-Fix-sparse-warnings.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0005-mailbox-arm_mhuv2-Fix-sparse-warnings.patch
new file mode 100644
index 0000000..8905f74
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0005-mailbox-arm_mhuv2-Fix-sparse-warnings.patch
@@ -0,0 +1,114 @@
+From 1c75e7d566e29258e9daf7b1548f2d681efb4aea Mon Sep 17 00:00:00 2001
+From: Viresh Kumar <viresh.kumar@linaro.org>
+Date: Wed, 30 Dec 2020 10:12:04 +0530
+Subject: [PATCH 05/22] mailbox: arm_mhuv2: Fix sparse warnings
+
+This patch fixes a bunch of sparse warnings in the newly added arm_mhuv2
+driver.
+
+drivers/mailbox/arm_mhuv2.c:506:24: warning: incorrect type in argument 1 (different address spaces)
+drivers/mailbox/arm_mhuv2.c:506:24:    expected void const volatile [noderef] __iomem *addr
+drivers/mailbox/arm_mhuv2.c:506:24:    got unsigned int [usertype] *
+drivers/mailbox/arm_mhuv2.c:547:42: warning: incorrect type in argument 2 (different address spaces)
+drivers/mailbox/arm_mhuv2.c:547:42:    expected unsigned int [usertype] *reg
+drivers/mailbox/arm_mhuv2.c:547:42:    got unsigned int [noderef] __iomem *
+drivers/mailbox/arm_mhuv2.c:625:42: warning: incorrect type in argument 2 (different address spaces)
+drivers/mailbox/arm_mhuv2.c:625:42:    expected unsigned int [usertype] *reg
+drivers/mailbox/arm_mhuv2.c:625:42:    got unsigned int [noderef] __iomem *
+drivers/mailbox/arm_mhuv2.c:972:24: warning: dereference of noderef expression
+drivers/mailbox/arm_mhuv2.c:973:22: warning: dereference of noderef expression
+drivers/mailbox/arm_mhuv2.c:993:25: warning: dereference of noderef expression
+drivers/mailbox/arm_mhuv2.c:1026:24: warning: dereference of noderef expression
+drivers/mailbox/arm_mhuv2.c:1027:22: warning: dereference of noderef expression
+drivers/mailbox/arm_mhuv2.c:1048:17: warning: dereference of noderef expression
+
+Reported-by: kernel test robot <lkp@intel.com>
+Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
+Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
+
+Upstream-Status: Backport [https://lkml.org/lkml/2021/2/9/428]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ drivers/mailbox/arm_mhuv2.c | 22 +++++++++++-----------
+ 1 file changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
+index 67fb10885bb4..8223c1005254 100644
+--- a/drivers/mailbox/arm_mhuv2.c
++++ b/drivers/mailbox/arm_mhuv2.c
+@@ -238,19 +238,19 @@ struct mhuv2_mbox_chan_priv {
+ };
+ 
+ /* Macro for reading a bitfield within a physically mapped packed struct */
+-#define readl_relaxed_bitfield(_regptr, _field)				\
++#define readl_relaxed_bitfield(_regptr, _type, _field)			\
+ 	({								\
+ 		u32 _regval;						\
+ 		_regval = readl_relaxed((_regptr));			\
+-		(*(typeof((_regptr)))(&_regval))._field;		\
++		(*(_type *)(&_regval))._field;				\
+ 	})
+ 
+ /* Macro for writing a bitfield within a physically mapped packed struct */
+-#define writel_relaxed_bitfield(_value, _regptr, _field)		\
++#define writel_relaxed_bitfield(_value, _regptr, _type, _field)		\
+ 	({								\
+ 		u32 _regval;						\
+ 		_regval = readl_relaxed(_regptr);			\
+-		(*(typeof(_regptr))(&_regval))._field = _value;		\
++		(*(_type *)(&_regval))._field = _value;			\
+ 		writel_relaxed(_regval, _regptr);			\
+ 	})
+ 
+@@ -496,7 +496,7 @@ static const struct mhuv2_protocol_ops mhuv2_data_transfer_ops = {
+ 
+ /* Interrupt handlers */
+ 
+-static struct mbox_chan *get_irq_chan_comb(struct mhuv2 *mhu, u32 *reg)
++static struct mbox_chan *get_irq_chan_comb(struct mhuv2 *mhu, u32 __iomem *reg)
+ {
+ 	struct mbox_chan *chans = mhu->mbox.chans;
+ 	int channel = 0, i, offset = 0, windows, protocol, ch_wn;
+@@ -969,8 +969,8 @@ static int mhuv2_tx_init(struct amba_device *adev, struct mhuv2 *mhu,
+ 	mhu->mbox.ops = &mhuv2_sender_ops;
+ 	mhu->send = reg;
+ 
+-	mhu->windows = readl_relaxed_bitfield(&mhu->send->mhu_cfg, num_ch);
+-	mhu->minor = readl_relaxed_bitfield(&mhu->send->aidr, arch_minor_rev);
++	mhu->windows = readl_relaxed_bitfield(&mhu->send->mhu_cfg, struct mhu_cfg_t, num_ch);
++	mhu->minor = readl_relaxed_bitfield(&mhu->send->aidr, struct aidr_t, arch_minor_rev);
+ 
+ 	spin_lock_init(&mhu->doorbell_pending_lock);
+ 
+@@ -990,7 +990,7 @@ static int mhuv2_tx_init(struct amba_device *adev, struct mhuv2 *mhu,
+ 			mhu->mbox.txdone_poll = false;
+ 			mhu->irq = adev->irq[0];
+ 
+-			writel_relaxed_bitfield(1, &mhu->send->int_en, chcomb);
++			writel_relaxed_bitfield(1, &mhu->send->int_en, struct int_en_t, chcomb);
+ 
+ 			/* Disable all channel interrupts */
+ 			for (i = 0; i < mhu->windows; i++)
+@@ -1023,8 +1023,8 @@ static int mhuv2_rx_init(struct amba_device *adev, struct mhuv2 *mhu,
+ 	mhu->mbox.ops = &mhuv2_receiver_ops;
+ 	mhu->recv = reg;
+ 
+-	mhu->windows = readl_relaxed_bitfield(&mhu->recv->mhu_cfg, num_ch);
+-	mhu->minor = readl_relaxed_bitfield(&mhu->recv->aidr, arch_minor_rev);
++	mhu->windows = readl_relaxed_bitfield(&mhu->recv->mhu_cfg, struct mhu_cfg_t, num_ch);
++	mhu->minor = readl_relaxed_bitfield(&mhu->recv->aidr, struct aidr_t, arch_minor_rev);
+ 
+ 	mhu->irq = adev->irq[0];
+ 	if (!mhu->irq) {
+@@ -1045,7 +1045,7 @@ static int mhuv2_rx_init(struct amba_device *adev, struct mhuv2 *mhu,
+ 		writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[i].mask_set);
+ 
+ 	if (mhu->minor)
+-		writel_relaxed_bitfield(1, &mhu->recv->int_en, chcomb);
++		writel_relaxed_bitfield(1, &mhu->recv->int_en, struct int_en_t, chcomb);
+ 
+ 	return 0;
+ }
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0006-mailbox-arm_mhuv2-make-remove-callback-return-void.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0006-mailbox-arm_mhuv2-make-remove-callback-return-void.patch
new file mode 100644
index 0000000..a353f31
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0006-mailbox-arm_mhuv2-make-remove-callback-return-void.patch
@@ -0,0 +1,47 @@
+From 107f39e7741bb77688df47ce3f56b25cceb301c3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
+Date: Tue, 2 Feb 2021 20:43:08 +0100
+Subject: [PATCH 06/22] mailbox: arm_mhuv2: make remove callback return void
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+My build tests failed to catch that amba driver that would have needed
+adaption in commit 3fd269e74f2f ("amba: Make the remove callback return
+void"). Change the remove function to make the driver build again.
+
+Reported-by: kernel test robot <lkp@intel.com>
+Fixes: 3fd269e74f2f ("amba: Make the remove callback return void")
+Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
+Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
+
+Upstream-Status: Backport [https://lkml.org/lkml/2021/2/2/1525]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ drivers/mailbox/arm_mhuv2.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
+index 8223c1005254..cdfb1939fabf 100644
+--- a/drivers/mailbox/arm_mhuv2.c
++++ b/drivers/mailbox/arm_mhuv2.c
+@@ -1095,14 +1095,12 @@ static int mhuv2_probe(struct amba_device *adev, const struct amba_id *id)
+ 	return ret;
+ }
+ 
+-static int mhuv2_remove(struct amba_device *adev)
++static void mhuv2_remove(struct amba_device *adev)
+ {
+ 	struct mhuv2 *mhu = amba_get_drvdata(adev);
+ 
+ 	if (mhu->frame == SENDER_FRAME)
+ 		writel_relaxed(0x0, &mhu->send->access_request);
+-
+-	return 0;
+ }
+ 
+ static struct amba_id mhuv2_ids[] = {
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0007-mailbox-arm_mhuv2-Skip-calling-kfree-with-invalid-po.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0007-mailbox-arm_mhuv2-Skip-calling-kfree-with-invalid-po.patch
new file mode 100644
index 0000000..cf5b0b0
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0007-mailbox-arm_mhuv2-Skip-calling-kfree-with-invalid-po.patch
@@ -0,0 +1,41 @@
+From 81d76e92b03a6f33acefd8aef168948c5f595205 Mon Sep 17 00:00:00 2001
+From: Viresh Kumar <viresh.kumar@linaro.org>
+Date: Mon, 22 Feb 2021 12:48:06 +0530
+Subject: [PATCH 07/22] mailbox: arm_mhuv2: Skip calling kfree() with invalid
+ pointer
+
+It is possible that 'data' passed to kfree() is set to a error value
+instead of allocated space. Make sure it doesn't get called with invalid
+pointer.
+
+Fixes: 5a6338cce9f4 ("mailbox: arm_mhuv2: Add driver")
+Cc: v5.11 <stable@vger.kernel.org> # v5.11
+Reported-by: kernel test robot <lkp@intel.com>
+Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
+Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
+Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
+
+Upstream-Status: Backport [https://lkml.org/lkml/2021/2/22/57]
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ drivers/mailbox/arm_mhuv2.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
+index cdfb1939fabf..d997f8ebfa98 100644
+--- a/drivers/mailbox/arm_mhuv2.c
++++ b/drivers/mailbox/arm_mhuv2.c
+@@ -699,7 +699,9 @@ static irqreturn_t mhuv2_receiver_interrupt(int irq, void *arg)
+ 		ret = IRQ_HANDLED;
+ 	}
+ 
+-	kfree(data);
++	if (!IS_ERR(data))
++		kfree(data);
++
+ 	return ret;
+ }
+ 
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0008-firmware-arm_ffa-Backport-of-arm_ffa-driver.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0008-firmware-arm_ffa-Backport-of-arm_ffa-driver.patch
new file mode 100644
index 0000000..d91dbc5
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0008-firmware-arm_ffa-Backport-of-arm_ffa-driver.patch
@@ -0,0 +1,1684 @@
+From 85df9333f0adf60fd76eb5ebb21b89c5b0a86c10 Mon Sep 17 00:00:00 2001
+From: Sudeep Holla <sudeep.holla@arm.com>
+Date: Tue, 18 May 2021 17:36:18 +0100
+Subject: [PATCH 01/32] firmware: arm_ffa: Backport of arm_ffa driver
+
+This is a backport of upstream ARM FFA driver from:
+https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git/commit/?h=v5.10/ffa&id=c0aff30cb9ad6a00c82acef0f2a48f99adf997c0
+
+to branch=android12-5.10-lts
+
+   arm64: smccc: Add support for SMCCCv1.2 extended input/output registers
+   commit 3fdc0cb59d97f87e2cc708d424f1538e31744286 upstream.
+
+   firmware: arm_ffa: Add initial FFA bus support for device enumeration
+   commit e781858488b918e30a6ff28e9eab6058b787e3b3 upstream.
+
+   firmware: arm_ffa: Add initial Arm FFA driver support
+   commit 3bbfe9871005f38df2955b2e125933edf1d2feef upstream.
+
+   firmware: arm_ffa: Add support for SMCCC as transport to FFA driver
+   commit 714be77e976a4b013b935b3223b2ef68856084d0 upstream.
+
+   firmware: arm_ffa: Setup in-kernel users of FFA partitions
+   commit d0c0bce831223b08e5bade2cefc93c3ddb790796 upstream.
+
+   firmware: arm_ffa: Add support for MEM_* interfaces
+   commit cc2195fe536c28e192df5d07e6dd277af36814b4 upstream.
+
+   firmware: arm_ffa: Ensure drivers provide a probe function
+   commit 92743071464fca5acbbe812d9a0d88de3eaaad36 upstream.
+
+   firmware: arm_ffa: Simplify probe function
+   commit e362547addc39e4bb18ad5bdfd59ce4d512d0c08 upstream.
+
+   firmware: arm_ffa: Fix the comment style
+   commit ba684a31d3626c86cd9097e12d6ed57d224d077d upstream.
+
+   firmware: arm_ffa: Fix a possible ffa_linux_errmap buffer overflow
+   commit dd925db6f07556061c11ab1fbfa4a0145ae6b438 upstream.
+
+   firmware: arm_ffa: Add missing remove callback to ffa_bus_type
+   commit 244f5d597e1ea519c2085fbd9819458688775e42 upstream.
+
+   firmware: arm_ffa: Fix __ffa_devices_unregister
+   commit eb7b52e6db7c21400b9b2d539f9343fb6e94bd94 upstream.
+
+   firmware: arm_ffa: Handle compatibility with different firmware versions
+   commit 8e3f9da608f14cfebac2659d8dd8737b79d01308 upstream.
+
+   firmware: arm_ffa: Add support for MEM_LEND
+   commit 82a8daaecfd9382e9450a05f86be8a274cf69a27 upstream.
+
+   firmware: arm_ffa: Remove unused 'compat_version' variable
+   commit 01537a078b86917c7bb69aa4b756b42b980c158b upstream.
+
+Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
+Change-Id: If9df40d2d10be9e3c95298820bc20c201ea1774c
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+
+Upstream-Status: Backport
+Change-Id: I8e6197d8b7ef6654dacd21450069b8e284a3cec5
+---
+ MAINTAINERS                       |   7 +
+ arch/arm64/kernel/asm-offsets.c   |   9 +
+ arch/arm64/kernel/smccc-call.S    |  57 +++
+ drivers/firmware/Kconfig          |   1 +
+ drivers/firmware/Makefile         |   1 +
+ drivers/firmware/arm_ffa/Kconfig  |  21 +
+ drivers/firmware/arm_ffa/Makefile |   6 +
+ drivers/firmware/arm_ffa/bus.c    | 220 +++++++++
+ drivers/firmware/arm_ffa/common.h |  31 ++
+ drivers/firmware/arm_ffa/driver.c | 776 ++++++++++++++++++++++++++++++
+ drivers/firmware/arm_ffa/smccc.c  |  39 ++
+ include/linux/arm-smccc.h         |  55 +++
+ include/linux/arm_ffa.h           | 269 +++++++++++
+ 13 files changed, 1492 insertions(+)
+ create mode 100644 drivers/firmware/arm_ffa/Kconfig
+ create mode 100644 drivers/firmware/arm_ffa/Makefile
+ create mode 100644 drivers/firmware/arm_ffa/bus.c
+ create mode 100644 drivers/firmware/arm_ffa/common.h
+ create mode 100644 drivers/firmware/arm_ffa/driver.c
+ create mode 100644 drivers/firmware/arm_ffa/smccc.c
+ create mode 100644 include/linux/arm_ffa.h
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 5234423c477a..d5fdc9e68c89 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -6847,6 +6847,13 @@ F:	include/linux/firewire.h
+ F:	include/uapi/linux/firewire*.h
+ F:	tools/firewire/
+ 
++FIRMWARE FRAMEWORK FOR ARMV8-A
++M:	Sudeep Holla <sudeep.holla@arm.com>
++L:	linux-arm-kernel@lists.infradead.org
++S:	Maintained
++F:	drivers/firmware/arm_ffa/
++F:	include/linux/arm_ffa.h
++
+ FIRMWARE LOADER (request_firmware)
+ M:	Luis Chamberlain <mcgrof@kernel.org>
+ L:	linux-kernel@vger.kernel.org
+diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
+index 93da876a58e6..bad4a367da28 100644
+--- a/arch/arm64/kernel/asm-offsets.c
++++ b/arch/arm64/kernel/asm-offsets.c
+@@ -139,6 +139,15 @@ int main(void)
+   DEFINE(ARM_SMCCC_RES_X2_OFFS,		offsetof(struct arm_smccc_res, a2));
+   DEFINE(ARM_SMCCC_QUIRK_ID_OFFS,	offsetof(struct arm_smccc_quirk, id));
+   DEFINE(ARM_SMCCC_QUIRK_STATE_OFFS,	offsetof(struct arm_smccc_quirk, state));
++  DEFINE(ARM_SMCCC_1_2_REGS_X0_OFFS,	offsetof(struct arm_smccc_1_2_regs, a0));
++  DEFINE(ARM_SMCCC_1_2_REGS_X2_OFFS,	offsetof(struct arm_smccc_1_2_regs, a2));
++  DEFINE(ARM_SMCCC_1_2_REGS_X4_OFFS,	offsetof(struct arm_smccc_1_2_regs, a4));
++  DEFINE(ARM_SMCCC_1_2_REGS_X6_OFFS,	offsetof(struct arm_smccc_1_2_regs, a6));
++  DEFINE(ARM_SMCCC_1_2_REGS_X8_OFFS,	offsetof(struct arm_smccc_1_2_regs, a8));
++  DEFINE(ARM_SMCCC_1_2_REGS_X10_OFFS,	offsetof(struct arm_smccc_1_2_regs, a10));
++  DEFINE(ARM_SMCCC_1_2_REGS_X12_OFFS,	offsetof(struct arm_smccc_1_2_regs, a12));
++  DEFINE(ARM_SMCCC_1_2_REGS_X14_OFFS,	offsetof(struct arm_smccc_1_2_regs, a14));
++  DEFINE(ARM_SMCCC_1_2_REGS_X16_OFFS,	offsetof(struct arm_smccc_1_2_regs, a16));
+   BLANK();
+   DEFINE(HIBERN_PBE_ORIG,	offsetof(struct pbe, orig_address));
+   DEFINE(HIBERN_PBE_ADDR,	offsetof(struct pbe, address));
+diff --git a/arch/arm64/kernel/smccc-call.S b/arch/arm64/kernel/smccc-call.S
+index d62447964ed9..2def9d0dd3dd 100644
+--- a/arch/arm64/kernel/smccc-call.S
++++ b/arch/arm64/kernel/smccc-call.S
+@@ -43,3 +43,60 @@ SYM_FUNC_START(__arm_smccc_hvc)
+ 	SMCCC	hvc
+ SYM_FUNC_END(__arm_smccc_hvc)
+ EXPORT_SYMBOL(__arm_smccc_hvc)
++
++	.macro SMCCC_1_2 instr
++	/* Save `res` and free a GPR that won't be clobbered */
++	stp     x1, x19, [sp, #-16]!
++
++	/* Ensure `args` won't be clobbered while loading regs in next step */
++	mov	x19, x0
++
++	/* Load the registers x0 - x17 from the struct arm_smccc_1_2_regs */
++	ldp	x0, x1, [x19, #ARM_SMCCC_1_2_REGS_X0_OFFS]
++	ldp	x2, x3, [x19, #ARM_SMCCC_1_2_REGS_X2_OFFS]
++	ldp	x4, x5, [x19, #ARM_SMCCC_1_2_REGS_X4_OFFS]
++	ldp	x6, x7, [x19, #ARM_SMCCC_1_2_REGS_X6_OFFS]
++	ldp	x8, x9, [x19, #ARM_SMCCC_1_2_REGS_X8_OFFS]
++	ldp	x10, x11, [x19, #ARM_SMCCC_1_2_REGS_X10_OFFS]
++	ldp	x12, x13, [x19, #ARM_SMCCC_1_2_REGS_X12_OFFS]
++	ldp	x14, x15, [x19, #ARM_SMCCC_1_2_REGS_X14_OFFS]
++	ldp	x16, x17, [x19, #ARM_SMCCC_1_2_REGS_X16_OFFS]
++
++	\instr #0
++
++	/* Load the `res` from the stack */
++	ldr	x19, [sp]
++
++	/* Store the registers x0 - x17 into the result structure */
++	stp	x0, x1, [x19, #ARM_SMCCC_1_2_REGS_X0_OFFS]
++	stp	x2, x3, [x19, #ARM_SMCCC_1_2_REGS_X2_OFFS]
++	stp	x4, x5, [x19, #ARM_SMCCC_1_2_REGS_X4_OFFS]
++	stp	x6, x7, [x19, #ARM_SMCCC_1_2_REGS_X6_OFFS]
++	stp	x8, x9, [x19, #ARM_SMCCC_1_2_REGS_X8_OFFS]
++	stp	x10, x11, [x19, #ARM_SMCCC_1_2_REGS_X10_OFFS]
++	stp	x12, x13, [x19, #ARM_SMCCC_1_2_REGS_X12_OFFS]
++	stp	x14, x15, [x19, #ARM_SMCCC_1_2_REGS_X14_OFFS]
++	stp	x16, x17, [x19, #ARM_SMCCC_1_2_REGS_X16_OFFS]
++
++	/* Restore original x19 */
++	ldp     xzr, x19, [sp], #16
++	ret
++.endm
++
++/*
++ * void arm_smccc_1_2_hvc(const struct arm_smccc_1_2_regs *args,
++ *			  struct arm_smccc_1_2_regs *res);
++ */
++SYM_FUNC_START(arm_smccc_1_2_hvc)
++	SMCCC_1_2 hvc
++SYM_FUNC_END(arm_smccc_1_2_hvc)
++EXPORT_SYMBOL(arm_smccc_1_2_hvc)
++
++/*
++ * void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args,
++ *			  struct arm_smccc_1_2_regs *res);
++ */
++SYM_FUNC_START(arm_smccc_1_2_smc)
++	SMCCC_1_2 smc
++SYM_FUNC_END(arm_smccc_1_2_smc)
++EXPORT_SYMBOL(arm_smccc_1_2_smc)
+diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
+index bfef3d8d14e7..90e6dd32f2cd 100644
+--- a/drivers/firmware/Kconfig
++++ b/drivers/firmware/Kconfig
+@@ -296,6 +296,7 @@ config TURRIS_MOX_RWTM
+ 	  other manufacturing data and also utilize the Entropy Bit Generator
+ 	  for hardware random number generation.
+ 
++source "drivers/firmware/arm_ffa/Kconfig"
+ source "drivers/firmware/broadcom/Kconfig"
+ source "drivers/firmware/google/Kconfig"
+ source "drivers/firmware/efi/Kconfig"
+diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
+index 523173cbff33..3c2af2e98def 100644
+--- a/drivers/firmware/Makefile
++++ b/drivers/firmware/Makefile
+@@ -23,6 +23,7 @@ obj-$(CONFIG_TI_SCI_PROTOCOL)	+= ti_sci.o
+ obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
+ obj-$(CONFIG_TURRIS_MOX_RWTM)	+= turris-mox-rwtm.o
+ 
++obj-y				+= arm_ffa/
+ obj-y				+= arm_scmi/
+ obj-y				+= broadcom/
+ obj-y				+= meson/
+diff --git a/drivers/firmware/arm_ffa/Kconfig b/drivers/firmware/arm_ffa/Kconfig
+new file mode 100644
+index 000000000000..5e3ae5cf82e8
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/Kconfig
+@@ -0,0 +1,21 @@
++# SPDX-License-Identifier: GPL-2.0-only
++config ARM_FFA_TRANSPORT
++	tristate "Arm Firmware Framework for Armv8-A"
++	depends on OF
++	depends on ARM64
++	default n
++	help
++	  This Firmware Framework(FF) for Arm A-profile processors describes
++	  interfaces that standardize communication between the various
++	  software images which includes communication between images in
++	  the Secure world and Normal world. It also leverages the
++	  virtualization extension to isolate software images provided
++	  by an ecosystem of vendors from each other.
++
++	  This driver provides interface for all the client drivers making
++	  use of the features offered by ARM FF-A.
++
++config ARM_FFA_SMCCC
++	bool
++	default ARM_FFA_TRANSPORT
++	depends on ARM64 && HAVE_ARM_SMCCC_DISCOVERY
+diff --git a/drivers/firmware/arm_ffa/Makefile b/drivers/firmware/arm_ffa/Makefile
+new file mode 100644
+index 000000000000..9d9f37523200
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/Makefile
+@@ -0,0 +1,6 @@
++# SPDX-License-Identifier: GPL-2.0-only
++ffa-bus-y = bus.o
++ffa-driver-y = driver.o
++ffa-transport-$(CONFIG_ARM_FFA_SMCCC) += smccc.o
++ffa-module-objs := $(ffa-bus-y) $(ffa-driver-y) $(ffa-transport-y)
++obj-$(CONFIG_ARM_FFA_TRANSPORT) = ffa-module.o
+diff --git a/drivers/firmware/arm_ffa/bus.c b/drivers/firmware/arm_ffa/bus.c
+new file mode 100644
+index 000000000000..fca1e311ea6c
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/bus.c
+@@ -0,0 +1,220 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
++
++#include <linux/arm_ffa.h>
++#include <linux/device.h>
++#include <linux/fs.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/types.h>
++
++#include "common.h"
++
++static int ffa_device_match(struct device *dev, struct device_driver *drv)
++{
++	const struct ffa_device_id *id_table;
++	struct ffa_device *ffa_dev;
++
++	id_table = to_ffa_driver(drv)->id_table;
++	ffa_dev = to_ffa_dev(dev);
++
++	while (!uuid_is_null(&id_table->uuid)) {
++		/*
++		 * FF-A v1.0 doesn't provide discovery of UUIDs, just the
++		 * partition IDs, so fetch the partitions IDs for this
++		 * id_table UUID and assign the UUID to the device if the
++		 * partition ID matches
++		 */
++		if (uuid_is_null(&ffa_dev->uuid))
++			ffa_device_match_uuid(ffa_dev, &id_table->uuid);
++
++		if (uuid_equal(&ffa_dev->uuid, &id_table->uuid))
++			return 1;
++		id_table++;
++	}
++
++	return 0;
++}
++
++static int ffa_device_probe(struct device *dev)
++{
++	struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver);
++	struct ffa_device *ffa_dev = to_ffa_dev(dev);
++
++	return ffa_drv->probe(ffa_dev);
++}
++
++static int ffa_device_remove(struct device *dev)
++{
++	struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver);
++
++	ffa_drv->remove(to_ffa_dev(dev));
++
++	return 0;
++}
++
++static int ffa_device_uevent(struct device *dev, struct kobj_uevent_env *env)
++{
++	struct ffa_device *ffa_dev = to_ffa_dev(dev);
++
++	return add_uevent_var(env, "MODALIAS=arm_ffa:%04x:%pUb",
++			      ffa_dev->vm_id, &ffa_dev->uuid);
++}
++
++static ssize_t partition_id_show(struct device *dev,
++				 struct device_attribute *attr, char *buf)
++{
++	struct ffa_device *ffa_dev = to_ffa_dev(dev);
++
++	return sprintf(buf, "0x%04x\n", ffa_dev->vm_id);
++}
++static DEVICE_ATTR_RO(partition_id);
++
++static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
++			 char *buf)
++{
++	struct ffa_device *ffa_dev = to_ffa_dev(dev);
++
++	return sprintf(buf, "%pUb\n", &ffa_dev->uuid);
++}
++static DEVICE_ATTR_RO(uuid);
++
++static struct attribute *ffa_device_attributes_attrs[] = {
++	&dev_attr_partition_id.attr,
++	&dev_attr_uuid.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(ffa_device_attributes);
++
++struct bus_type ffa_bus_type = {
++	.name		= "arm_ffa",
++	.match		= ffa_device_match,
++	.probe		= ffa_device_probe,
++	.remove		= ffa_device_remove,
++	.uevent		= ffa_device_uevent,
++	.dev_groups	= ffa_device_attributes_groups,
++};
++EXPORT_SYMBOL_GPL(ffa_bus_type);
++
++int ffa_driver_register(struct ffa_driver *driver, struct module *owner,
++			const char *mod_name)
++{
++	int ret;
++
++	if (!driver->probe)
++		return -EINVAL;
++
++	driver->driver.bus = &ffa_bus_type;
++	driver->driver.name = driver->name;
++	driver->driver.owner = owner;
++	driver->driver.mod_name = mod_name;
++
++	ret = driver_register(&driver->driver);
++	if (!ret)
++		pr_debug("registered new ffa driver %s\n", driver->name);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(ffa_driver_register);
++
++void ffa_driver_unregister(struct ffa_driver *driver)
++{
++	driver_unregister(&driver->driver);
++}
++EXPORT_SYMBOL_GPL(ffa_driver_unregister);
++
++static void ffa_release_device(struct device *dev)
++{
++	struct ffa_device *ffa_dev = to_ffa_dev(dev);
++
++	kfree(ffa_dev);
++}
++
++static int __ffa_devices_unregister(struct device *dev, void *data)
++{
++	device_unregister(dev);
++
++	return 0;
++}
++
++static void ffa_devices_unregister(void)
++{
++	bus_for_each_dev(&ffa_bus_type, NULL, NULL,
++			 __ffa_devices_unregister);
++}
++
++bool ffa_device_is_valid(struct ffa_device *ffa_dev)
++{
++	bool valid = false;
++	struct device *dev = NULL;
++	struct ffa_device *tmp_dev;
++
++	do {
++		dev = bus_find_next_device(&ffa_bus_type, dev);
++		tmp_dev = to_ffa_dev(dev);
++		if (tmp_dev == ffa_dev) {
++			valid = true;
++			break;
++		}
++		put_device(dev);
++	} while (dev);
++
++	put_device(dev);
++
++	return valid;
++}
++
++struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id)
++{
++	int ret;
++	struct device *dev;
++	struct ffa_device *ffa_dev;
++
++	ffa_dev = kzalloc(sizeof(*ffa_dev), GFP_KERNEL);
++	if (!ffa_dev)
++		return NULL;
++
++	dev = &ffa_dev->dev;
++	dev->bus = &ffa_bus_type;
++	dev->release = ffa_release_device;
++	dev_set_name(&ffa_dev->dev, "arm-ffa-%04x", vm_id);
++
++	ffa_dev->vm_id = vm_id;
++	uuid_copy(&ffa_dev->uuid, uuid);
++
++	ret = device_register(&ffa_dev->dev);
++	if (ret) {
++		dev_err(dev, "unable to register device %s err=%d\n",
++			dev_name(dev), ret);
++		put_device(dev);
++		return NULL;
++	}
++
++	return ffa_dev;
++}
++EXPORT_SYMBOL_GPL(ffa_device_register);
++
++void ffa_device_unregister(struct ffa_device *ffa_dev)
++{
++	if (!ffa_dev)
++		return;
++
++	device_unregister(&ffa_dev->dev);
++}
++EXPORT_SYMBOL_GPL(ffa_device_unregister);
++
++int arm_ffa_bus_init(void)
++{
++	return bus_register(&ffa_bus_type);
++}
++
++void arm_ffa_bus_exit(void)
++{
++	ffa_devices_unregister();
++	bus_unregister(&ffa_bus_type);
++}
+diff --git a/drivers/firmware/arm_ffa/common.h b/drivers/firmware/arm_ffa/common.h
+new file mode 100644
+index 000000000000..d6eccf1fd3f6
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/common.h
+@@ -0,0 +1,31 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#ifndef _FFA_COMMON_H
++#define _FFA_COMMON_H
++
++#include <linux/arm_ffa.h>
++#include <linux/arm-smccc.h>
++#include <linux/err.h>
++
++typedef struct arm_smccc_1_2_regs ffa_value_t;
++
++typedef void (ffa_fn)(ffa_value_t, ffa_value_t *);
++
++int arm_ffa_bus_init(void);
++void arm_ffa_bus_exit(void);
++bool ffa_device_is_valid(struct ffa_device *ffa_dev);
++void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid);
++
++#ifdef CONFIG_ARM_FFA_SMCCC
++int __init ffa_transport_init(ffa_fn **invoke_ffa_fn);
++#else
++static inline int __init ffa_transport_init(ffa_fn **invoke_ffa_fn)
++{
++	return -EOPNOTSUPP;
++}
++#endif
++
++#endif /* _FFA_COMMON_H */
+diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
+new file mode 100644
+index 000000000000..14f900047ac0
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/driver.c
+@@ -0,0 +1,776 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Arm Firmware Framework for ARMv8-A(FFA) interface driver
++ *
++ * The Arm FFA specification[1] describes a software architecture to
++ * leverages the virtualization extension to isolate software images
++ * provided by an ecosystem of vendors from each other and describes
++ * interfaces that standardize communication between the various software
++ * images including communication between images in the Secure world and
++ * Normal world. Any Hypervisor could use the FFA interfaces to enable
++ * communication between VMs it manages.
++ *
++ * The Hypervisor a.k.a Partition managers in FFA terminology can assign
++ * system resources(Memory regions, Devices, CPU cycles) to the partitions
++ * and manage isolation amongst them.
++ *
++ * [1] https://developer.arm.com/docs/den0077/latest
++ *
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#define DRIVER_NAME "ARM FF-A"
++#define pr_fmt(fmt) DRIVER_NAME ": " fmt
++
++#include <linux/arm_ffa.h>
++#include <linux/bitfield.h>
++#include <linux/device.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/mm.h>
++#include <linux/scatterlist.h>
++#include <linux/slab.h>
++#include <linux/uuid.h>
++
++#include "common.h"
++
++#define FFA_DRIVER_VERSION	FFA_VERSION_1_0
++
++#define FFA_SMC(calling_convention, func_num)				\
++	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, (calling_convention),	\
++			   ARM_SMCCC_OWNER_STANDARD, (func_num))
++
++#define FFA_SMC_32(func_num)	FFA_SMC(ARM_SMCCC_SMC_32, (func_num))
++#define FFA_SMC_64(func_num)	FFA_SMC(ARM_SMCCC_SMC_64, (func_num))
++
++#define FFA_ERROR			FFA_SMC_32(0x60)
++#define FFA_SUCCESS			FFA_SMC_32(0x61)
++#define FFA_INTERRUPT			FFA_SMC_32(0x62)
++#define FFA_VERSION			FFA_SMC_32(0x63)
++#define FFA_FEATURES			FFA_SMC_32(0x64)
++#define FFA_RX_RELEASE			FFA_SMC_32(0x65)
++#define FFA_RXTX_MAP			FFA_SMC_32(0x66)
++#define FFA_FN64_RXTX_MAP		FFA_SMC_64(0x66)
++#define FFA_RXTX_UNMAP			FFA_SMC_32(0x67)
++#define FFA_PARTITION_INFO_GET		FFA_SMC_32(0x68)
++#define FFA_ID_GET			FFA_SMC_32(0x69)
++#define FFA_MSG_POLL			FFA_SMC_32(0x6A)
++#define FFA_MSG_WAIT			FFA_SMC_32(0x6B)
++#define FFA_YIELD			FFA_SMC_32(0x6C)
++#define FFA_RUN				FFA_SMC_32(0x6D)
++#define FFA_MSG_SEND			FFA_SMC_32(0x6E)
++#define FFA_MSG_SEND_DIRECT_REQ		FFA_SMC_32(0x6F)
++#define FFA_FN64_MSG_SEND_DIRECT_REQ	FFA_SMC_64(0x6F)
++#define FFA_MSG_SEND_DIRECT_RESP	FFA_SMC_32(0x70)
++#define FFA_FN64_MSG_SEND_DIRECT_RESP	FFA_SMC_64(0x70)
++#define FFA_MEM_DONATE			FFA_SMC_32(0x71)
++#define FFA_FN64_MEM_DONATE		FFA_SMC_64(0x71)
++#define FFA_MEM_LEND			FFA_SMC_32(0x72)
++#define FFA_FN64_MEM_LEND		FFA_SMC_64(0x72)
++#define FFA_MEM_SHARE			FFA_SMC_32(0x73)
++#define FFA_FN64_MEM_SHARE		FFA_SMC_64(0x73)
++#define FFA_MEM_RETRIEVE_REQ		FFA_SMC_32(0x74)
++#define FFA_FN64_MEM_RETRIEVE_REQ	FFA_SMC_64(0x74)
++#define FFA_MEM_RETRIEVE_RESP		FFA_SMC_32(0x75)
++#define FFA_MEM_RELINQUISH		FFA_SMC_32(0x76)
++#define FFA_MEM_RECLAIM			FFA_SMC_32(0x77)
++#define FFA_MEM_OP_PAUSE		FFA_SMC_32(0x78)
++#define FFA_MEM_OP_RESUME		FFA_SMC_32(0x79)
++#define FFA_MEM_FRAG_RX			FFA_SMC_32(0x7A)
++#define FFA_MEM_FRAG_TX			FFA_SMC_32(0x7B)
++#define FFA_NORMAL_WORLD_RESUME		FFA_SMC_32(0x7C)
++
++/*
++ * For some calls it is necessary to use SMC64 to pass or return 64-bit values.
++ * For such calls FFA_FN_NATIVE(name) will choose the appropriate
++ * (native-width) function ID.
++ */
++#ifdef CONFIG_64BIT
++#define FFA_FN_NATIVE(name)	FFA_FN64_##name
++#else
++#define FFA_FN_NATIVE(name)	FFA_##name
++#endif
++
++/* FFA error codes. */
++#define FFA_RET_SUCCESS            (0)
++#define FFA_RET_NOT_SUPPORTED      (-1)
++#define FFA_RET_INVALID_PARAMETERS (-2)
++#define FFA_RET_NO_MEMORY          (-3)
++#define FFA_RET_BUSY               (-4)
++#define FFA_RET_INTERRUPTED        (-5)
++#define FFA_RET_DENIED             (-6)
++#define FFA_RET_RETRY              (-7)
++#define FFA_RET_ABORTED            (-8)
++
++#define MAJOR_VERSION_MASK	GENMASK(30, 16)
++#define MINOR_VERSION_MASK	GENMASK(15, 0)
++#define MAJOR_VERSION(x)	((u16)(FIELD_GET(MAJOR_VERSION_MASK, (x))))
++#define MINOR_VERSION(x)	((u16)(FIELD_GET(MINOR_VERSION_MASK, (x))))
++#define PACK_VERSION_INFO(major, minor)			\
++	(FIELD_PREP(MAJOR_VERSION_MASK, (major)) |	\
++	 FIELD_PREP(MINOR_VERSION_MASK, (minor)))
++#define FFA_VERSION_1_0		PACK_VERSION_INFO(1, 0)
++#define FFA_MIN_VERSION		FFA_VERSION_1_0
++
++#define SENDER_ID_MASK		GENMASK(31, 16)
++#define RECEIVER_ID_MASK	GENMASK(15, 0)
++#define SENDER_ID(x)		((u16)(FIELD_GET(SENDER_ID_MASK, (x))))
++#define RECEIVER_ID(x)		((u16)(FIELD_GET(RECEIVER_ID_MASK, (x))))
++#define PACK_TARGET_INFO(s, r)		\
++	(FIELD_PREP(SENDER_ID_MASK, (s)) | FIELD_PREP(RECEIVER_ID_MASK, (r)))
++
++/*
++ * FF-A specification mentions explicitly about '4K pages'. This should
++ * not be confused with the kernel PAGE_SIZE, which is the translation
++ * granule kernel is configured and may be one among 4K, 16K and 64K.
++ */
++#define FFA_PAGE_SIZE		SZ_4K
++/*
++ * Keeping RX TX buffer size as 4K for now
++ * 64K may be preferred to keep it min a page in 64K PAGE_SIZE config
++ */
++#define RXTX_BUFFER_SIZE	SZ_4K
++
++static ffa_fn *invoke_ffa_fn;
++
++static const int ffa_linux_errmap[] = {
++	/* better than switch case as long as return value is continuous */
++	0,		/* FFA_RET_SUCCESS */
++	-EOPNOTSUPP,	/* FFA_RET_NOT_SUPPORTED */
++	-EINVAL,	/* FFA_RET_INVALID_PARAMETERS */
++	-ENOMEM,	/* FFA_RET_NO_MEMORY */
++	-EBUSY,		/* FFA_RET_BUSY */
++	-EINTR,		/* FFA_RET_INTERRUPTED */
++	-EACCES,	/* FFA_RET_DENIED */
++	-EAGAIN,	/* FFA_RET_RETRY */
++	-ECANCELED,	/* FFA_RET_ABORTED */
++};
++
++static inline int ffa_to_linux_errno(int errno)
++{
++	int err_idx = -errno;
++
++	if (err_idx >= 0 && err_idx < ARRAY_SIZE(ffa_linux_errmap))
++		return ffa_linux_errmap[err_idx];
++	return -EINVAL;
++}
++
++struct ffa_drv_info {
++	u32 version;
++	u16 vm_id;
++	struct mutex rx_lock; /* lock to protect Rx buffer */
++	struct mutex tx_lock; /* lock to protect Tx buffer */
++	void *rx_buffer;
++	void *tx_buffer;
++};
++
++static struct ffa_drv_info *drv_info;
++
++/*
++ * The driver must be able to support all the versions from the earliest
++ * supported FFA_MIN_VERSION to the latest supported FFA_DRIVER_VERSION.
++ * The specification states that if firmware supports a FFA implementation
++ * that is incompatible with and at a greater version number than specified
++ * by the caller(FFA_DRIVER_VERSION passed as parameter to FFA_VERSION),
++ * it must return the NOT_SUPPORTED error code.
++ */
++static u32 ffa_compatible_version_find(u32 version)
++{
++	u16 major = MAJOR_VERSION(version), minor = MINOR_VERSION(version);
++	u16 drv_major = MAJOR_VERSION(FFA_DRIVER_VERSION);
++	u16 drv_minor = MINOR_VERSION(FFA_DRIVER_VERSION);
++
++	if ((major < drv_major) || (major == drv_major && minor <= drv_minor))
++		return version;
++
++	pr_info("Firmware version higher than driver version, downgrading\n");
++	return FFA_DRIVER_VERSION;
++}
++
++static int ffa_version_check(u32 *version)
++{
++	ffa_value_t ver;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_VERSION, .a1 = FFA_DRIVER_VERSION,
++		      }, &ver);
++
++	if (ver.a0 == FFA_RET_NOT_SUPPORTED) {
++		pr_info("FFA_VERSION returned not supported\n");
++		return -EOPNOTSUPP;
++	}
++
++	if (ver.a0 < FFA_MIN_VERSION) {
++		pr_err("Incompatible v%d.%d! Earliest supported v%d.%d\n",
++		       MAJOR_VERSION(ver.a0), MINOR_VERSION(ver.a0),
++		       MAJOR_VERSION(FFA_MIN_VERSION),
++		       MINOR_VERSION(FFA_MIN_VERSION));
++		return -EINVAL;
++	}
++
++	pr_info("Driver version %d.%d\n", MAJOR_VERSION(FFA_DRIVER_VERSION),
++		MINOR_VERSION(FFA_DRIVER_VERSION));
++	pr_info("Firmware version %d.%d found\n", MAJOR_VERSION(ver.a0),
++		MINOR_VERSION(ver.a0));
++	*version = ffa_compatible_version_find(ver.a0);
++
++	return 0;
++}
++
++static int ffa_rx_release(void)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_RX_RELEASE,
++		      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	/* check for ret.a0 == FFA_RX_RELEASE ? */
++
++	return 0;
++}
++
++static int ffa_rxtx_map(phys_addr_t tx_buf, phys_addr_t rx_buf, u32 pg_cnt)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_FN_NATIVE(RXTX_MAP),
++		      .a1 = tx_buf, .a2 = rx_buf, .a3 = pg_cnt,
++		      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	return 0;
++}
++
++static int ffa_rxtx_unmap(u16 vm_id)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_RXTX_UNMAP, .a1 = PACK_TARGET_INFO(vm_id, 0),
++		      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	return 0;
++}
++
++/* buffer must be sizeof(struct ffa_partition_info) * num_partitions */
++static int
++__ffa_partition_info_get(u32 uuid0, u32 uuid1, u32 uuid2, u32 uuid3,
++			 struct ffa_partition_info *buffer, int num_partitions)
++{
++	int count;
++	ffa_value_t partition_info;
++
++	mutex_lock(&drv_info->rx_lock);
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_PARTITION_INFO_GET,
++		      .a1 = uuid0, .a2 = uuid1, .a3 = uuid2, .a4 = uuid3,
++		      }, &partition_info);
++
++	if (partition_info.a0 == FFA_ERROR) {
++		mutex_unlock(&drv_info->rx_lock);
++		return ffa_to_linux_errno((int)partition_info.a2);
++	}
++
++	count = partition_info.a2;
++
++	if (buffer && count <= num_partitions)
++		memcpy(buffer, drv_info->rx_buffer, sizeof(*buffer) * count);
++
++	ffa_rx_release();
++
++	mutex_unlock(&drv_info->rx_lock);
++
++	return count;
++}
++
++/* buffer is allocated and caller must free the same if returned count > 0 */
++static int
++ffa_partition_probe(const uuid_t *uuid, struct ffa_partition_info **buffer)
++{
++	int count;
++	u32 uuid0_4[4];
++	struct ffa_partition_info *pbuf;
++
++	export_uuid((u8 *)uuid0_4, uuid);
++	count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], uuid0_4[2],
++					 uuid0_4[3], NULL, 0);
++	if (count <= 0)
++		return count;
++
++	pbuf = kcalloc(count, sizeof(*pbuf), GFP_KERNEL);
++	if (!pbuf)
++		return -ENOMEM;
++
++	count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], uuid0_4[2],
++					 uuid0_4[3], pbuf, count);
++	if (count <= 0)
++		kfree(pbuf);
++	else
++		*buffer = pbuf;
++
++	return count;
++}
++
++#define VM_ID_MASK	GENMASK(15, 0)
++static int ffa_id_get(u16 *vm_id)
++{
++	ffa_value_t id;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_ID_GET,
++		      }, &id);
++
++	if (id.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)id.a2);
++
++	*vm_id = FIELD_GET(VM_ID_MASK, (id.a2));
++
++	return 0;
++}
++
++static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit,
++				   struct ffa_send_direct_data *data)
++{
++	u32 req_id, resp_id, src_dst_ids = PACK_TARGET_INFO(src_id, dst_id);
++	ffa_value_t ret;
++
++	if (mode_32bit) {
++		req_id = FFA_MSG_SEND_DIRECT_REQ;
++		resp_id = FFA_MSG_SEND_DIRECT_RESP;
++	} else {
++		req_id = FFA_FN_NATIVE(MSG_SEND_DIRECT_REQ);
++		resp_id = FFA_FN_NATIVE(MSG_SEND_DIRECT_RESP);
++	}
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = req_id, .a1 = src_dst_ids, .a2 = 0,
++		      .a3 = data->data0, .a4 = data->data1, .a5 = data->data2,
++		      .a6 = data->data3, .a7 = data->data4,
++		      }, &ret);
++
++	while (ret.a0 == FFA_INTERRUPT)
++		invoke_ffa_fn((ffa_value_t){
++			      .a0 = FFA_RUN, .a1 = ret.a1,
++			      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	if (ret.a0 == resp_id) {
++		data->data0 = ret.a3;
++		data->data1 = ret.a4;
++		data->data2 = ret.a5;
++		data->data3 = ret.a6;
++		data->data4 = ret.a7;
++		return 0;
++	}
++
++	return -EINVAL;
++}
++
++static int ffa_mem_first_frag(u32 func_id, phys_addr_t buf, u32 buf_sz,
++			      u32 frag_len, u32 len, u64 *handle)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = func_id, .a1 = len, .a2 = frag_len,
++		      .a3 = buf, .a4 = buf_sz,
++		      }, &ret);
++
++	while (ret.a0 == FFA_MEM_OP_PAUSE)
++		invoke_ffa_fn((ffa_value_t){
++			      .a0 = FFA_MEM_OP_RESUME,
++			      .a1 = ret.a1, .a2 = ret.a2,
++			      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	if (ret.a0 != FFA_SUCCESS)
++		return -EOPNOTSUPP;
++
++	if (handle)
++		*handle = PACK_HANDLE(ret.a2, ret.a3);
++
++	return frag_len;
++}
++
++static int ffa_mem_next_frag(u64 handle, u32 frag_len)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_MEM_FRAG_TX,
++		      .a1 = HANDLE_LOW(handle), .a2 = HANDLE_HIGH(handle),
++		      .a3 = frag_len,
++		      }, &ret);
++
++	while (ret.a0 == FFA_MEM_OP_PAUSE)
++		invoke_ffa_fn((ffa_value_t){
++			      .a0 = FFA_MEM_OP_RESUME,
++			      .a1 = ret.a1, .a2 = ret.a2,
++			      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	if (ret.a0 != FFA_MEM_FRAG_RX)
++		return -EOPNOTSUPP;
++
++	return ret.a3;
++}
++
++static int
++ffa_transmit_fragment(u32 func_id, phys_addr_t buf, u32 buf_sz, u32 frag_len,
++		      u32 len, u64 *handle, bool first)
++{
++	if (!first)
++		return ffa_mem_next_frag(*handle, frag_len);
++
++	return ffa_mem_first_frag(func_id, buf, buf_sz, frag_len, len, handle);
++}
++
++static u32 ffa_get_num_pages_sg(struct scatterlist *sg)
++{
++	u32 num_pages = 0;
++
++	do {
++		num_pages += sg->length / FFA_PAGE_SIZE;
++	} while ((sg = sg_next(sg)));
++
++	return num_pages;
++}
++
++static int
++ffa_setup_and_transmit(u32 func_id, void *buffer, u32 max_fragsize,
++		       struct ffa_mem_ops_args *args)
++{
++	int rc = 0;
++	bool first = true;
++	phys_addr_t addr = 0;
++	struct ffa_composite_mem_region *composite;
++	struct ffa_mem_region_addr_range *constituents;
++	struct ffa_mem_region_attributes *ep_mem_access;
++	struct ffa_mem_region *mem_region = buffer;
++	u32 idx, frag_len, length, buf_sz = 0, num_entries = sg_nents(args->sg);
++
++	mem_region->tag = args->tag;
++	mem_region->flags = args->flags;
++	mem_region->sender_id = drv_info->vm_id;
++	mem_region->attributes = FFA_MEM_NORMAL | FFA_MEM_WRITE_BACK |
++				 FFA_MEM_INNER_SHAREABLE;
++	ep_mem_access = &mem_region->ep_mem_access[0];
++
++	for (idx = 0; idx < args->nattrs; idx++, ep_mem_access++) {
++		ep_mem_access->receiver = args->attrs[idx].receiver;
++		ep_mem_access->attrs = args->attrs[idx].attrs;
++		ep_mem_access->composite_off = COMPOSITE_OFFSET(args->nattrs);
++	}
++	mem_region->ep_count = args->nattrs;
++
++	composite = buffer + COMPOSITE_OFFSET(args->nattrs);
++	composite->total_pg_cnt = ffa_get_num_pages_sg(args->sg);
++	composite->addr_range_cnt = num_entries;
++
++	length = COMPOSITE_CONSTITUENTS_OFFSET(args->nattrs, num_entries);
++	frag_len = COMPOSITE_CONSTITUENTS_OFFSET(args->nattrs, 0);
++	if (frag_len > max_fragsize)
++		return -ENXIO;
++
++	if (!args->use_txbuf) {
++		addr = virt_to_phys(buffer);
++		buf_sz = max_fragsize / FFA_PAGE_SIZE;
++	}
++
++	constituents = buffer + frag_len;
++	idx = 0;
++	do {
++		if (frag_len == max_fragsize) {
++			rc = ffa_transmit_fragment(func_id, addr, buf_sz,
++						   frag_len, length,
++						   &args->g_handle, first);
++			if (rc < 0)
++				return -ENXIO;
++
++			first = false;
++			idx = 0;
++			frag_len = 0;
++			constituents = buffer;
++		}
++
++		if ((void *)constituents - buffer > max_fragsize) {
++			pr_err("Memory Region Fragment > Tx Buffer size\n");
++			return -EFAULT;
++		}
++
++		constituents->address = sg_phys(args->sg);
++		constituents->pg_cnt = args->sg->length / FFA_PAGE_SIZE;
++		constituents++;
++		frag_len += sizeof(struct ffa_mem_region_addr_range);
++	} while ((args->sg = sg_next(args->sg)));
++
++	return ffa_transmit_fragment(func_id, addr, buf_sz, frag_len,
++				     length, &args->g_handle, first);
++}
++
++static int ffa_memory_ops(u32 func_id, struct ffa_mem_ops_args *args)
++{
++	int ret;
++	void *buffer;
++
++	if (!args->use_txbuf) {
++		buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL);
++		if (!buffer)
++			return -ENOMEM;
++	} else {
++		buffer = drv_info->tx_buffer;
++		mutex_lock(&drv_info->tx_lock);
++	}
++
++	ret = ffa_setup_and_transmit(func_id, buffer, RXTX_BUFFER_SIZE, args);
++
++	if (args->use_txbuf)
++		mutex_unlock(&drv_info->tx_lock);
++	else
++		free_pages_exact(buffer, RXTX_BUFFER_SIZE);
++
++	return ret < 0 ? ret : 0;
++}
++
++static int ffa_memory_reclaim(u64 g_handle, u32 flags)
++{
++	ffa_value_t ret;
++
++	invoke_ffa_fn((ffa_value_t){
++		      .a0 = FFA_MEM_RECLAIM,
++		      .a1 = HANDLE_LOW(g_handle), .a2 = HANDLE_HIGH(g_handle),
++		      .a3 = flags,
++		      }, &ret);
++
++	if (ret.a0 == FFA_ERROR)
++		return ffa_to_linux_errno((int)ret.a2);
++
++	return 0;
++}
++
++static u32 ffa_api_version_get(void)
++{
++	return drv_info->version;
++}
++
++static int ffa_partition_info_get(const char *uuid_str,
++				  struct ffa_partition_info *buffer)
++{
++	int count;
++	uuid_t uuid;
++	struct ffa_partition_info *pbuf;
++
++	if (uuid_parse(uuid_str, &uuid)) {
++		pr_err("invalid uuid (%s)\n", uuid_str);
++		return -ENODEV;
++	}
++
++	count = ffa_partition_probe(&uuid_null, &pbuf);
++	if (count <= 0)
++		return -ENOENT;
++
++	memcpy(buffer, pbuf, sizeof(*pbuf) * count);
++	kfree(pbuf);
++	return 0;
++}
++
++static void ffa_mode_32bit_set(struct ffa_device *dev)
++{
++	dev->mode_32bit = true;
++}
++
++static int ffa_sync_send_receive(struct ffa_device *dev,
++				 struct ffa_send_direct_data *data)
++{
++	return ffa_msg_send_direct_req(drv_info->vm_id, dev->vm_id,
++				       dev->mode_32bit, data);
++}
++
++static int
++ffa_memory_share(struct ffa_device *dev, struct ffa_mem_ops_args *args)
++{
++	if (dev->mode_32bit)
++		return ffa_memory_ops(FFA_MEM_SHARE, args);
++
++	return ffa_memory_ops(FFA_FN_NATIVE(MEM_SHARE), args);
++}
++
++static int
++ffa_memory_lend(struct ffa_device *dev, struct ffa_mem_ops_args *args)
++{
++	/* Note that upon a successful MEM_LEND request the caller
++	 * must ensure that the memory region specified is not accessed
++	 * until a successful MEM_RECALIM call has been made.
++	 * On systems with a hypervisor present this will been enforced,
++	 * however on systems without a hypervisor the responsibility
++	 * falls to the calling kernel driver to prevent access.
++	 */
++	if (dev->mode_32bit)
++		return ffa_memory_ops(FFA_MEM_LEND, args);
++
++	return ffa_memory_ops(FFA_FN_NATIVE(MEM_LEND), args);
++}
++
++static const struct ffa_dev_ops ffa_ops = {
++	.api_version_get = ffa_api_version_get,
++	.partition_info_get = ffa_partition_info_get,
++	.mode_32bit_set = ffa_mode_32bit_set,
++	.sync_send_receive = ffa_sync_send_receive,
++	.memory_reclaim = ffa_memory_reclaim,
++	.memory_share = ffa_memory_share,
++	.memory_lend = ffa_memory_lend,
++};
++
++const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev)
++{
++	if (ffa_device_is_valid(dev))
++		return &ffa_ops;
++
++	return NULL;
++}
++EXPORT_SYMBOL_GPL(ffa_dev_ops_get);
++
++void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid)
++{
++	int count, idx;
++	struct ffa_partition_info *pbuf, *tpbuf;
++
++	count = ffa_partition_probe(uuid, &pbuf);
++	if (count <= 0)
++		return;
++
++	for (idx = 0, tpbuf = pbuf; idx < count; idx++, tpbuf++)
++		if (tpbuf->id == ffa_dev->vm_id)
++			uuid_copy(&ffa_dev->uuid, uuid);
++	kfree(pbuf);
++}
++
++static void ffa_setup_partitions(void)
++{
++	int count, idx;
++	struct ffa_device *ffa_dev;
++	struct ffa_partition_info *pbuf, *tpbuf;
++
++	count = ffa_partition_probe(&uuid_null, &pbuf);
++	if (count <= 0) {
++		pr_info("%s: No partitions found, error %d\n", __func__, count);
++		return;
++	}
++
++	for (idx = 0, tpbuf = pbuf; idx < count; idx++, tpbuf++) {
++		/* Note that the &uuid_null parameter will require
++		 * ffa_device_match() to find the UUID of this partition id
++		 * with help of ffa_device_match_uuid(). Once the FF-A spec
++		 * is updated to provide correct UUID here for each partition
++		 * as part of the discovery API, we need to pass the
++		 * discovered UUID here instead.
++		 */
++		ffa_dev = ffa_device_register(&uuid_null, tpbuf->id);
++		if (!ffa_dev) {
++			pr_err("%s: failed to register partition ID 0x%x\n",
++			       __func__, tpbuf->id);
++			continue;
++		}
++
++		ffa_dev_set_drvdata(ffa_dev, drv_info);
++	}
++	kfree(pbuf);
++}
++
++static int __init ffa_init(void)
++{
++	int ret;
++
++	ret = ffa_transport_init(&invoke_ffa_fn);
++	if (ret)
++		return ret;
++
++	ret = arm_ffa_bus_init();
++	if (ret)
++		return ret;
++
++	drv_info = kzalloc(sizeof(*drv_info), GFP_KERNEL);
++	if (!drv_info) {
++		ret = -ENOMEM;
++		goto ffa_bus_exit;
++	}
++
++	ret = ffa_version_check(&drv_info->version);
++	if (ret)
++		goto free_drv_info;
++
++	if (ffa_id_get(&drv_info->vm_id)) {
++		pr_err("failed to obtain VM id for self\n");
++		ret = -ENODEV;
++		goto free_drv_info;
++	}
++
++	drv_info->rx_buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL);
++	if (!drv_info->rx_buffer) {
++		ret = -ENOMEM;
++		goto free_pages;
++	}
++
++	drv_info->tx_buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL);
++	if (!drv_info->tx_buffer) {
++		ret = -ENOMEM;
++		goto free_pages;
++	}
++
++	ret = ffa_rxtx_map(virt_to_phys(drv_info->tx_buffer),
++			   virt_to_phys(drv_info->rx_buffer),
++			   RXTX_BUFFER_SIZE / FFA_PAGE_SIZE);
++	if (ret) {
++		pr_err("failed to register FFA RxTx buffers\n");
++		goto free_pages;
++	}
++
++	mutex_init(&drv_info->rx_lock);
++	mutex_init(&drv_info->tx_lock);
++
++	ffa_setup_partitions();
++
++	return 0;
++free_pages:
++	if (drv_info->tx_buffer)
++		free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE);
++	free_pages_exact(drv_info->rx_buffer, RXTX_BUFFER_SIZE);
++free_drv_info:
++	kfree(drv_info);
++ffa_bus_exit:
++	arm_ffa_bus_exit();
++	return ret;
++}
++subsys_initcall(ffa_init);
++
++static void __exit ffa_exit(void)
++{
++	ffa_rxtx_unmap(drv_info->vm_id);
++	free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE);
++	free_pages_exact(drv_info->rx_buffer, RXTX_BUFFER_SIZE);
++	kfree(drv_info);
++	arm_ffa_bus_exit();
++}
++module_exit(ffa_exit);
++
++MODULE_ALIAS("arm-ffa");
++MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
++MODULE_DESCRIPTION("Arm FF-A interface driver");
++MODULE_LICENSE("GPL v2");
+diff --git a/drivers/firmware/arm_ffa/smccc.c b/drivers/firmware/arm_ffa/smccc.c
+new file mode 100644
+index 000000000000..4d85bfff0a4e
+--- /dev/null
++++ b/drivers/firmware/arm_ffa/smccc.c
+@@ -0,0 +1,39 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#include <linux/printk.h>
++
++#include "common.h"
++
++static void __arm_ffa_fn_smc(ffa_value_t args, ffa_value_t *res)
++{
++	arm_smccc_1_2_smc(&args, res);
++}
++
++static void __arm_ffa_fn_hvc(ffa_value_t args, ffa_value_t *res)
++{
++	arm_smccc_1_2_hvc(&args, res);
++}
++
++int __init ffa_transport_init(ffa_fn **invoke_ffa_fn)
++{
++	enum arm_smccc_conduit conduit;
++
++	if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2)
++		return -EOPNOTSUPP;
++
++	conduit = arm_smccc_1_1_get_conduit();
++	if (conduit == SMCCC_CONDUIT_NONE) {
++		pr_err("%s: invalid SMCCC conduit\n", __func__);
++		return -EOPNOTSUPP;
++	}
++
++	if (conduit == SMCCC_CONDUIT_SMC)
++		*invoke_ffa_fn = __arm_ffa_fn_smc;
++	else
++		*invoke_ffa_fn = __arm_ffa_fn_hvc;
++
++	return 0;
++}
+diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
+index 62c54234576c..c8eb24af3c62 100644
+--- a/include/linux/arm-smccc.h
++++ b/include/linux/arm-smccc.h
+@@ -186,6 +186,61 @@ struct arm_smccc_res {
+ 	unsigned long a3;
+ };
+ 
++#ifdef CONFIG_ARM64
++/**
++ * struct arm_smccc_1_2_regs - Arguments for or Results from SMC/HVC call
++ * @a0-a17 argument values from registers 0 to 17
++ */
++struct arm_smccc_1_2_regs {
++	unsigned long a0;
++	unsigned long a1;
++	unsigned long a2;
++	unsigned long a3;
++	unsigned long a4;
++	unsigned long a5;
++	unsigned long a6;
++	unsigned long a7;
++	unsigned long a8;
++	unsigned long a9;
++	unsigned long a10;
++	unsigned long a11;
++	unsigned long a12;
++	unsigned long a13;
++	unsigned long a14;
++	unsigned long a15;
++	unsigned long a16;
++	unsigned long a17;
++};
++
++/**
++ * arm_smccc_1_2_hvc() - make HVC calls
++ * @args: arguments passed via struct arm_smccc_1_2_regs
++ * @res: result values via struct arm_smccc_1_2_regs
++ *
++ * This function is used to make HVC calls following SMC Calling Convention
++ * v1.2 or above. The content of the supplied param are copied from the
++ * structure to registers prior to the HVC instruction. The return values
++ * are updated with the content from registers on return from the HVC
++ * instruction.
++ */
++asmlinkage void arm_smccc_1_2_hvc(const struct arm_smccc_1_2_regs *args,
++				  struct arm_smccc_1_2_regs *res);
++
++/**
++ * arm_smccc_1_2_smc() - make SMC calls
++ * @args: arguments passed via struct arm_smccc_1_2_regs
++ * @res: result values via struct arm_smccc_1_2_regs
++ *
++ * This function is used to make SMC calls following SMC Calling Convention
++ * v1.2 or above. The content of the supplied param are copied from the
++ * structure to registers prior to the SMC instruction. The return values
++ * are updated with the content from registers on return from the SMC
++ * instruction.
++ */
++asmlinkage void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args,
++				  struct arm_smccc_1_2_regs *res);
++#endif
++
+ /**
+  * struct arm_smccc_quirk - Contains quirk information
+  * @id: quirk identification
+diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
+new file mode 100644
+index 000000000000..85651e41ded8
+--- /dev/null
++++ b/include/linux/arm_ffa.h
+@@ -0,0 +1,269 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#ifndef _LINUX_ARM_FFA_H
++#define _LINUX_ARM_FFA_H
++
++#include <linux/device.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/uuid.h>
++
++/* FFA Bus/Device/Driver related */
++struct ffa_device {
++	int vm_id;
++	bool mode_32bit;
++	uuid_t uuid;
++	struct device dev;
++};
++
++#define to_ffa_dev(d) container_of(d, struct ffa_device, dev)
++
++struct ffa_device_id {
++	uuid_t uuid;
++};
++
++struct ffa_driver {
++	const char *name;
++	int (*probe)(struct ffa_device *sdev);
++	void (*remove)(struct ffa_device *sdev);
++	const struct ffa_device_id *id_table;
++
++	struct device_driver driver;
++};
++
++#define to_ffa_driver(d) container_of(d, struct ffa_driver, driver)
++
++static inline void ffa_dev_set_drvdata(struct ffa_device *fdev, void *data)
++{
++	fdev->dev.driver_data = data;
++}
++
++#if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)
++struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id);
++void ffa_device_unregister(struct ffa_device *ffa_dev);
++int ffa_driver_register(struct ffa_driver *driver, struct module *owner,
++			const char *mod_name);
++void ffa_driver_unregister(struct ffa_driver *driver);
++bool ffa_device_is_valid(struct ffa_device *ffa_dev);
++const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev);
++
++#else
++static inline
++struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id)
++{
++	return NULL;
++}
++
++static inline void ffa_device_unregister(struct ffa_device *dev) {}
++
++static inline int
++ffa_driver_register(struct ffa_driver *driver, struct module *owner,
++		    const char *mod_name)
++{
++	return -EINVAL;
++}
++
++static inline void ffa_driver_unregister(struct ffa_driver *driver) {}
++
++static inline
++bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; }
++
++static inline
++const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev)
++{
++	return NULL;
++}
++#endif /* CONFIG_ARM_FFA_TRANSPORT */
++
++#define ffa_register(driver) \
++	ffa_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
++#define ffa_unregister(driver) \
++	ffa_driver_unregister(driver)
++
++/**
++ * module_ffa_driver() - Helper macro for registering a psa_ffa driver
++ * @__ffa_driver: ffa_driver structure
++ *
++ * Helper macro for psa_ffa drivers to set up proper module init / exit
++ * functions.  Replaces module_init() and module_exit() and keeps people from
++ * printing pointless things to the kernel log when their driver is loaded.
++ */
++#define module_ffa_driver(__ffa_driver)	\
++	module_driver(__ffa_driver, ffa_register, ffa_unregister)
++
++/* FFA transport related */
++struct ffa_partition_info {
++	u16 id;
++	u16 exec_ctxt;
++/* partition supports receipt of direct requests */
++#define FFA_PARTITION_DIRECT_RECV	BIT(0)
++/* partition can send direct requests. */
++#define FFA_PARTITION_DIRECT_SEND	BIT(1)
++/* partition can send and receive indirect messages. */
++#define FFA_PARTITION_INDIRECT_MSG	BIT(2)
++	u32 properties;
++};
++
++/* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */
++struct ffa_send_direct_data {
++	unsigned long data0; /* w3/x3 */
++	unsigned long data1; /* w4/x4 */
++	unsigned long data2; /* w5/x5 */
++	unsigned long data3; /* w6/x6 */
++	unsigned long data4; /* w7/x7 */
++};
++
++struct ffa_mem_region_addr_range {
++	/* The base IPA of the constituent memory region, aligned to 4 kiB */
++	u64 address;
++	/* The number of 4 kiB pages in the constituent memory region. */
++	u32 pg_cnt;
++	u32 reserved;
++};
++
++struct ffa_composite_mem_region {
++	/*
++	 * The total number of 4 kiB pages included in this memory region. This
++	 * must be equal to the sum of page counts specified in each
++	 * `struct ffa_mem_region_addr_range`.
++	 */
++	u32 total_pg_cnt;
++	/* The number of constituents included in this memory region range */
++	u32 addr_range_cnt;
++	u64 reserved;
++	/** An array of `addr_range_cnt` memory region constituents. */
++	struct ffa_mem_region_addr_range constituents[];
++};
++
++struct ffa_mem_region_attributes {
++	/* The ID of the VM to which the memory is being given or shared. */
++	u16 receiver;
++	/*
++	 * The permissions with which the memory region should be mapped in the
++	 * receiver's page table.
++	 */
++#define FFA_MEM_EXEC		BIT(3)
++#define FFA_MEM_NO_EXEC		BIT(2)
++#define FFA_MEM_RW		BIT(1)
++#define FFA_MEM_RO		BIT(0)
++	u8 attrs;
++	/*
++	 * Flags used during FFA_MEM_RETRIEVE_REQ and FFA_MEM_RETRIEVE_RESP
++	 * for memory regions with multiple borrowers.
++	 */
++#define FFA_MEM_RETRIEVE_SELF_BORROWER	BIT(0)
++	u8 flag;
++	u32 composite_off;
++	/*
++	 * Offset in bytes from the start of the outer `ffa_memory_region` to
++	 * an `struct ffa_mem_region_addr_range`.
++	 */
++	u64 reserved;
++};
++
++struct ffa_mem_region {
++	/* The ID of the VM/owner which originally sent the memory region */
++	u16 sender_id;
++#define FFA_MEM_NORMAL		BIT(5)
++#define FFA_MEM_DEVICE		BIT(4)
++
++#define FFA_MEM_WRITE_BACK	(3 << 2)
++#define FFA_MEM_NON_CACHEABLE	(1 << 2)
++
++#define FFA_DEV_nGnRnE		(0 << 2)
++#define FFA_DEV_nGnRE		(1 << 2)
++#define FFA_DEV_nGRE		(2 << 2)
++#define FFA_DEV_GRE		(3 << 2)
++
++#define FFA_MEM_NON_SHAREABLE	(0)
++#define FFA_MEM_OUTER_SHAREABLE	(2)
++#define FFA_MEM_INNER_SHAREABLE	(3)
++	u8 attributes;
++	u8 reserved_0;
++/*
++ * Clear memory region contents after unmapping it from the sender and
++ * before mapping it for any receiver.
++ */
++#define FFA_MEM_CLEAR			BIT(0)
++/*
++ * Whether the hypervisor may time slice the memory sharing or retrieval
++ * operation.
++ */
++#define FFA_TIME_SLICE_ENABLE		BIT(1)
++
++#define FFA_MEM_RETRIEVE_TYPE_IN_RESP	(0 << 3)
++#define FFA_MEM_RETRIEVE_TYPE_SHARE	(1 << 3)
++#define FFA_MEM_RETRIEVE_TYPE_LEND	(2 << 3)
++#define FFA_MEM_RETRIEVE_TYPE_DONATE	(3 << 3)
++
++#define FFA_MEM_RETRIEVE_ADDR_ALIGN_HINT	BIT(9)
++#define FFA_MEM_RETRIEVE_ADDR_ALIGN(x)		((x) << 5)
++	/* Flags to control behaviour of the transaction. */
++	u32 flags;
++#define HANDLE_LOW_MASK		GENMASK_ULL(31, 0)
++#define HANDLE_HIGH_MASK	GENMASK_ULL(63, 32)
++#define HANDLE_LOW(x)		((u32)(FIELD_GET(HANDLE_LOW_MASK, (x))))
++#define	HANDLE_HIGH(x)		((u32)(FIELD_GET(HANDLE_HIGH_MASK, (x))))
++
++#define PACK_HANDLE(l, h)		\
++	(FIELD_PREP(HANDLE_LOW_MASK, (l)) | FIELD_PREP(HANDLE_HIGH_MASK, (h)))
++	/*
++	 * A globally-unique ID assigned by the hypervisor for a region
++	 * of memory being sent between VMs.
++	 */
++	u64 handle;
++	/*
++	 * An implementation defined value associated with the receiver and the
++	 * memory region.
++	 */
++	u64 tag;
++	u32 reserved_1;
++	/*
++	 * The number of `ffa_mem_region_attributes` entries included in this
++	 * transaction.
++	 */
++	u32 ep_count;
++	/*
++	 * An array of endpoint memory access descriptors.
++	 * Each one specifies a memory region offset, an endpoint and the
++	 * attributes with which this memory region should be mapped in that
++	 * endpoint's page table.
++	 */
++	struct ffa_mem_region_attributes ep_mem_access[];
++};
++
++#define	COMPOSITE_OFFSET(x)	\
++	(offsetof(struct ffa_mem_region, ep_mem_access[x]))
++#define CONSTITUENTS_OFFSET(x)	\
++	(offsetof(struct ffa_composite_mem_region, constituents[x]))
++#define COMPOSITE_CONSTITUENTS_OFFSET(x, y)	\
++	(COMPOSITE_OFFSET(x) + CONSTITUENTS_OFFSET(y))
++
++struct ffa_mem_ops_args {
++	bool use_txbuf;
++	u32 nattrs;
++	u32 flags;
++	u64 tag;
++	u64 g_handle;
++	struct scatterlist *sg;
++	struct ffa_mem_region_attributes *attrs;
++};
++
++struct ffa_dev_ops {
++	u32 (*api_version_get)(void);
++	int (*partition_info_get)(const char *uuid_str,
++				  struct ffa_partition_info *buffer);
++	void (*mode_32bit_set)(struct ffa_device *dev);
++	int (*sync_send_receive)(struct ffa_device *dev,
++				 struct ffa_send_direct_data *data);
++	int (*memory_reclaim)(u64 g_handle, u32 flags);
++	int (*memory_share)(struct ffa_device *dev,
++			    struct ffa_mem_ops_args *args);
++	int (*memory_lend)(struct ffa_device *dev,
++			   struct ffa_mem_ops_args *args);
++};
++
++#endif /* _LINUX_ARM_FFA_H */
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0009-tee-add-sec_world_id-to-struct-tee_shm.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0009-tee-add-sec_world_id-to-struct-tee_shm.patch
new file mode 100644
index 0000000..eab6527
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0009-tee-add-sec_world_id-to-struct-tee_shm.patch
@@ -0,0 +1,44 @@
+From 812d2a649a9cc2a0004cbde2b3e411b46ec84af4 Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Thu, 25 Mar 2021 15:08:44 +0100
+Subject: [PATCH 14/22] tee: add sec_world_id to struct tee_shm
+
+Adds sec_world_id to struct tee_shm which describes a shared memory
+object. sec_world_id can be used by a driver to store an id assigned by
+secure world.
+
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ include/linux/tee_drv.h | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
+index cdd049a724b1..93d836fded8b 100644
+--- a/include/linux/tee_drv.h
++++ b/include/linux/tee_drv.h
+@@ -196,7 +196,11 @@ int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
+  * @num_pages:	number of locked pages
+  * @dmabuf:	dmabuf used to for exporting to user space
+  * @flags:	defined by TEE_SHM_* in tee_drv.h
+- * @id:		unique id of a shared memory object on this device
++ * @id:		unique id of a shared memory object on this device, shared
++ *		with user space
++ * @sec_world_id:
++ *		secure world assigned id of this shared memory object, not
++ *		used by all drivers
+  *
+  * This pool is only supposed to be accessed directly from the TEE
+  * subsystem and from drivers that implements their own shm pool manager.
+@@ -212,6 +216,7 @@ struct tee_shm {
+ 	struct dma_buf *dmabuf;
+ 	u32 flags;
+ 	int id;
++	u64 sec_world_id;
+ };
+ 
+ /**
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0010-optee-simplify-optee_release.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0010-optee-simplify-optee_release.patch
new file mode 100644
index 0000000..94973c7
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0010-optee-simplify-optee_release.patch
@@ -0,0 +1,179 @@
+From cb4f6a55b9c61a82a65edcd4b18c505d92480710 Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Thu, 25 Mar 2021 15:08:46 +0100
+Subject: [PATCH 15/22] optee: simplify optee_release()
+
+Simplifies optee_release() with a new helper function,
+optee_close_session_helper() which has been factored out from
+optee_close_session().
+
+A separate optee_release_supp() is added for the supplicant device.
+
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/tee/optee/call.c          | 31 ++++++++++-------
+ drivers/tee/optee/core.c          | 55 +++++++++++--------------------
+ drivers/tee/optee/optee_private.h |  1 +
+ 3 files changed, 39 insertions(+), 48 deletions(-)
+
+diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
+index 0790de29f0ca..1b339b743ff5 100644
+--- a/drivers/tee/optee/call.c
++++ b/drivers/tee/optee/call.c
+@@ -285,12 +285,28 @@ int optee_open_session(struct tee_context *ctx,
+ 	return rc;
+ }
+ 
+-int optee_close_session(struct tee_context *ctx, u32 session)
++int optee_close_session_helper(struct tee_context *ctx, u32 session)
+ {
+-	struct optee_context_data *ctxdata = ctx->data;
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *msg_arg;
+ 	phys_addr_t msg_parg;
++
++	shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
++	if (IS_ERR(shm))
++		return PTR_ERR(shm);
++
++	msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
++	msg_arg->session = session;
++	optee_do_call_with_arg(ctx, msg_parg);
++
++	tee_shm_free(shm);
++
++	return 0;
++}
++
++int optee_close_session(struct tee_context *ctx, u32 session)
++{
++	struct optee_context_data *ctxdata = ctx->data;
+ 	struct optee_session *sess;
+ 
+ 	/* Check that the session is valid and remove it from the list */
+@@ -303,16 +319,7 @@ int optee_close_session(struct tee_context *ctx, u32 session)
+ 		return -EINVAL;
+ 	kfree(sess);
+ 
+-	shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
+-	if (IS_ERR(shm))
+-		return PTR_ERR(shm);
+-
+-	msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
+-	msg_arg->session = session;
+-	optee_do_call_with_arg(ctx, msg_parg);
+-
+-	tee_shm_free(shm);
+-	return 0;
++	return optee_close_session_helper(ctx, session);
+ }
+ 
+ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
+index 63542c1cc291..e39c6d290d83 100644
+--- a/drivers/tee/optee/core.c
++++ b/drivers/tee/optee/core.c
+@@ -263,59 +263,42 @@ static int optee_open(struct tee_context *ctx)
+ 	return 0;
+ }
+ 
+-static void optee_release(struct tee_context *ctx)
++static void optee_release_helper(struct tee_context *ctx,
++				 int (*close_session)(struct tee_context *ctx,
++						      u32 session))
+ {
+ 	struct optee_context_data *ctxdata = ctx->data;
+-	struct tee_device *teedev = ctx->teedev;
+-	struct optee *optee = tee_get_drvdata(teedev);
+-	struct tee_shm *shm;
+-	struct optee_msg_arg *arg = NULL;
+-	phys_addr_t parg;
+ 	struct optee_session *sess;
+ 	struct optee_session *sess_tmp;
+ 
+ 	if (!ctxdata)
+ 		return;
+ 
+-	shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED);
+-	if (!IS_ERR(shm)) {
+-		arg = tee_shm_get_va(shm, 0);
+-		/*
+-		 * If va2pa fails for some reason, we can't call into
+-		 * secure world, only free the memory. Secure OS will leak
+-		 * sessions and finally refuse more sessions, but we will
+-		 * at least let normal world reclaim its memory.
+-		 */
+-		if (!IS_ERR(arg))
+-			if (tee_shm_va2pa(shm, arg, &parg))
+-				arg = NULL; /* prevent usage of parg below */
+-	}
+-
+ 	list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
+ 				 list_node) {
+ 		list_del(&sess->list_node);
+-		if (!IS_ERR_OR_NULL(arg)) {
+-			memset(arg, 0, sizeof(*arg));
+-			arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
+-			arg->session = sess->session_id;
+-			optee_do_call_with_arg(ctx, parg);
+-		}
++		close_session(ctx, sess->session_id);
+ 		kfree(sess);
+ 	}
+ 	kfree(ctxdata);
++	ctx->data = NULL;
++}
+ 
+-	if (!IS_ERR(shm))
+-		tee_shm_free(shm);
++static void optee_release(struct tee_context *ctx)
++{
++	optee_release_helper(ctx, optee_close_session_helper);
++}
+ 
+-	ctx->data = NULL;
++static void optee_release_supp(struct tee_context *ctx)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 
+-	if (teedev == optee->supp_teedev) {
+-		if (optee->scan_bus_wq) {
+-			destroy_workqueue(optee->scan_bus_wq);
+-			optee->scan_bus_wq = NULL;
+-		}
+-		optee_supp_release(&optee->supp);
++	optee_release_helper(ctx, optee_close_session_helper);
++	if (optee->scan_bus_wq) {
++		destroy_workqueue(optee->scan_bus_wq);
++		optee->scan_bus_wq = NULL;
+ 	}
++	optee_supp_release(&optee->supp);
+ }
+ 
+ static const struct tee_driver_ops optee_ops = {
+@@ -339,7 +322,7 @@ static const struct tee_desc optee_desc = {
+ static const struct tee_driver_ops optee_supp_ops = {
+ 	.get_version = optee_get_version,
+ 	.open = optee_open,
+-	.release = optee_release,
++	.release = optee_release_supp,
+ 	.supp_recv = optee_supp_recv,
+ 	.supp_send = optee_supp_send,
+ 	.shm_register = optee_shm_register_supp,
+diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
+index e25b216a14ef..2b63b796645e 100644
+--- a/drivers/tee/optee/optee_private.h
++++ b/drivers/tee/optee/optee_private.h
+@@ -152,6 +152,7 @@ u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg);
+ int optee_open_session(struct tee_context *ctx,
+ 		       struct tee_ioctl_open_session_arg *arg,
+ 		       struct tee_param *param);
++int optee_close_session_helper(struct tee_context *ctx, u32 session);
+ int optee_close_session(struct tee_context *ctx, u32 session);
+ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ 		      struct tee_param *param);
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0011-optee-sync-OP-TEE-headers.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0011-optee-sync-OP-TEE-headers.patch
new file mode 100644
index 0000000..5e3e868
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0011-optee-sync-OP-TEE-headers.patch
@@ -0,0 +1,644 @@
+From 1e43bd55c951da0610230c4f28a8ebdd13b30733 Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Wed, 20 Jan 2021 11:14:12 +0100
+Subject: [PATCH 16/22] optee: sync OP-TEE headers
+
+Pulls in updates in the internal headers from OP-TEE OS [1]. A few
+defines has been shortened, hence the changes in rpc.c. Defines not used
+by the driver in tee_rpc_cmd.h has been filtered out.
+
+Note that this does not change the ABI.
+
+Link: [1] https://github.com/OP-TEE/optee_os
+Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+Change-Id: I5d20a22a3f38bfc9d232279d5f00505c4d3ba965
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.13-rc7&id=617d8e8b347edcee6da38df0aeb671fc9c9ba19c]
+---
+ drivers/tee/optee/optee_msg.h     | 156 ++----------------------------
+ drivers/tee/optee/optee_rpc_cmd.h | 103 ++++++++++++++++++++
+ drivers/tee/optee/optee_smc.h     |  70 +++++++++-----
+ drivers/tee/optee/rpc.c           |  39 ++++----
+ 4 files changed, 179 insertions(+), 189 deletions(-)
+ create mode 100644 drivers/tee/optee/optee_rpc_cmd.h
+
+diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h
+index c7ac7d02d6cc..5bef6a0165db 100644
+--- a/drivers/tee/optee/optee_msg.h
++++ b/drivers/tee/optee/optee_msg.h
+@@ -1,6 +1,6 @@
+ /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
+ /*
+- * Copyright (c) 2015-2019, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ #ifndef _OPTEE_MSG_H
+ #define _OPTEE_MSG_H
+@@ -12,11 +12,9 @@
+  * This file defines the OP-TEE message protocol (ABI) used to communicate
+  * with an instance of OP-TEE running in secure world.
+  *
+- * This file is divided into three sections.
++ * This file is divided into two sections.
+  * 1. Formatting of messages.
+  * 2. Requests from normal world
+- * 3. Requests from secure world, Remote Procedure Call (RPC), handled by
+- *    tee-supplicant.
+  */
+ 
+ /*****************************************************************************
+@@ -54,8 +52,8 @@
+  * Every entry in buffer should point to a 4k page beginning (12 least
+  * significant bits must be equal to zero).
+  *
+- * 12 least significant bints of optee_msg_param.u.tmem.buf_ptr should hold page
+- * offset of the user buffer.
++ * 12 least significant bits of optee_msg_param.u.tmem.buf_ptr should hold
++ * page offset of user buffer.
+  *
+  * So, entries should be placed like members of this structure:
+  *
+@@ -178,17 +176,9 @@ struct optee_msg_param {
+  * @params: the parameters supplied to the OS Command
+  *
+  * All normal calls to Trusted OS uses this struct. If cmd requires further
+- * information than what these field holds it can be passed as a parameter
++ * information than what these fields hold it can be passed as a parameter
+  * tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding
+- * attrs field). All parameters tagged as meta has to come first.
+- *
+- * Temp memref parameters can be fragmented if supported by the Trusted OS
+- * (when optee_smc.h is bearer of this protocol this is indicated with
+- * OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM). If a logical memref parameter is
+- * fragmented then has all but the last fragment the
+- * OPTEE_MSG_ATTR_FRAGMENT bit set in attrs. Even if a memref is fragmented
+- * it will still be presented as a single logical memref to the Trusted
+- * Application.
++ * attrs field). All parameters tagged as meta have to come first.
+  */
+ struct optee_msg_arg {
+ 	u32 cmd;
+@@ -292,15 +282,12 @@ struct optee_msg_arg {
+  * OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The
+  * information is passed as:
+  * [in] param[0].attr			OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
+- *					[| OPTEE_MSG_ATTR_FRAGMENT]
++ *					[| OPTEE_MSG_ATTR_NONCONTIG]
+  * [in] param[0].u.tmem.buf_ptr		physical address (of first fragment)
+  * [in] param[0].u.tmem.size		size (of first fragment)
+  * [in] param[0].u.tmem.shm_ref		holds shared memory reference
+- * ...
+- * The shared memory can optionally be fragmented, temp memrefs can follow
+- * each other with all but the last with the OPTEE_MSG_ATTR_FRAGMENT bit set.
+  *
+- * OPTEE_MSG_CMD_UNREGISTER_SHM unregisteres a previously registered shared
++ * OPTEE_MSG_CMD_UNREGISTER_SHM unregisters a previously registered shared
+  * memory reference. The information is passed as:
+  * [in] param[0].attr			OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
+  * [in] param[0].u.rmem.shm_ref		holds shared memory reference
+@@ -315,131 +302,4 @@ struct optee_msg_arg {
+ #define OPTEE_MSG_CMD_UNREGISTER_SHM	5
+ #define OPTEE_MSG_FUNCID_CALL_WITH_ARG	0x0004
+ 
+-/*****************************************************************************
+- * Part 3 - Requests from secure world, RPC
+- *****************************************************************************/
+-
+-/*
+- * All RPC is done with a struct optee_msg_arg as bearer of information,
+- * struct optee_msg_arg::arg holds values defined by OPTEE_MSG_RPC_CMD_* below
+- *
+- * RPC communication with tee-supplicant is reversed compared to normal
+- * client communication desribed above. The supplicant receives requests
+- * and sends responses.
+- */
+-
+-/*
+- * Load a TA into memory, defined in tee-supplicant
+- */
+-#define OPTEE_MSG_RPC_CMD_LOAD_TA	0
+-
+-/*
+- * Reserved
+- */
+-#define OPTEE_MSG_RPC_CMD_RPMB		1
+-
+-/*
+- * File system access, defined in tee-supplicant
+- */
+-#define OPTEE_MSG_RPC_CMD_FS		2
+-
+-/*
+- * Get time
+- *
+- * Returns number of seconds and nano seconds since the Epoch,
+- * 1970-01-01 00:00:00 +0000 (UTC).
+- *
+- * [out] param[0].u.value.a	Number of seconds
+- * [out] param[0].u.value.b	Number of nano seconds.
+- */
+-#define OPTEE_MSG_RPC_CMD_GET_TIME	3
+-
+-/*
+- * Wait queue primitive, helper for secure world to implement a wait queue.
+- *
+- * If secure world need to wait for a secure world mutex it issues a sleep
+- * request instead of spinning in secure world. Conversely is a wakeup
+- * request issued when a secure world mutex with a thread waiting thread is
+- * unlocked.
+- *
+- * Waiting on a key
+- * [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP
+- * [in] param[0].u.value.b wait key
+- *
+- * Waking up a key
+- * [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP
+- * [in] param[0].u.value.b wakeup key
+- */
+-#define OPTEE_MSG_RPC_CMD_WAIT_QUEUE	4
+-#define OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP	0
+-#define OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP	1
+-
+-/*
+- * Suspend execution
+- *
+- * [in] param[0].value	.a number of milliseconds to suspend
+- */
+-#define OPTEE_MSG_RPC_CMD_SUSPEND	5
+-
+-/*
+- * Allocate a piece of shared memory
+- *
+- * Shared memory can optionally be fragmented, to support that additional
+- * spare param entries are allocated to make room for eventual fragments.
+- * The spare param entries has .attr = OPTEE_MSG_ATTR_TYPE_NONE when
+- * unused. All returned temp memrefs except the last should have the
+- * OPTEE_MSG_ATTR_FRAGMENT bit set in the attr field.
+- *
+- * [in]  param[0].u.value.a		type of memory one of
+- *					OPTEE_MSG_RPC_SHM_TYPE_* below
+- * [in]  param[0].u.value.b		requested size
+- * [in]  param[0].u.value.c		required alignment
+- *
+- * [out] param[0].u.tmem.buf_ptr	physical address (of first fragment)
+- * [out] param[0].u.tmem.size		size (of first fragment)
+- * [out] param[0].u.tmem.shm_ref	shared memory reference
+- * ...
+- * [out] param[n].u.tmem.buf_ptr	physical address
+- * [out] param[n].u.tmem.size		size
+- * [out] param[n].u.tmem.shm_ref	shared memory reference (same value
+- *					as in param[n-1].u.tmem.shm_ref)
+- */
+-#define OPTEE_MSG_RPC_CMD_SHM_ALLOC	6
+-/* Memory that can be shared with a non-secure user space application */
+-#define OPTEE_MSG_RPC_SHM_TYPE_APPL	0
+-/* Memory only shared with non-secure kernel */
+-#define OPTEE_MSG_RPC_SHM_TYPE_KERNEL	1
+-
+-/*
+- * Free shared memory previously allocated with OPTEE_MSG_RPC_CMD_SHM_ALLOC
+- *
+- * [in]  param[0].u.value.a		type of memory one of
+- *					OPTEE_MSG_RPC_SHM_TYPE_* above
+- * [in]  param[0].u.value.b		value of shared memory reference
+- *					returned in param[0].u.tmem.shm_ref
+- *					above
+- */
+-#define OPTEE_MSG_RPC_CMD_SHM_FREE	7
+-
+-/*
+- * Access a device on an i2c bus
+- *
+- * [in]  param[0].u.value.a		mode: RD(0), WR(1)
+- * [in]  param[0].u.value.b		i2c adapter
+- * [in]  param[0].u.value.c		i2c chip
+- *
+- * [in]  param[1].u.value.a		i2c control flags
+- *
+- * [in/out] memref[2]			buffer to exchange the transfer data
+- *					with the secure world
+- *
+- * [out]  param[3].u.value.a		bytes transferred by the driver
+- */
+-#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER 21
+-/* I2C master transfer modes */
+-#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER_RD 0
+-#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER_WR 1
+-/* I2C master control flags */
+-#define OPTEE_MSG_RPC_CMD_I2C_FLAGS_TEN_BIT  BIT(0)
+-
+ #endif /* _OPTEE_MSG_H */
+diff --git a/drivers/tee/optee/optee_rpc_cmd.h b/drivers/tee/optee/optee_rpc_cmd.h
+new file mode 100644
+index 000000000000..b8275140cef8
+--- /dev/null
++++ b/drivers/tee/optee/optee_rpc_cmd.h
+@@ -0,0 +1,103 @@
++/* SPDX-License-Identifier: BSD-2-Clause */
++/*
++ * Copyright (c) 2016-2021, Linaro Limited
++ */
++
++#ifndef __OPTEE_RPC_CMD_H
++#define __OPTEE_RPC_CMD_H
++
++/*
++ * All RPC is done with a struct optee_msg_arg as bearer of information,
++ * struct optee_msg_arg::arg holds values defined by OPTEE_RPC_CMD_* below.
++ * Only the commands handled by the kernel driver are defined here.
++ *
++ * RPC communication with tee-supplicant is reversed compared to normal
++ * client communication described above. The supplicant receives requests
++ * and sends responses.
++ */
++
++/*
++ * Get time
++ *
++ * Returns number of seconds and nano seconds since the Epoch,
++ * 1970-01-01 00:00:00 +0000 (UTC).
++ *
++ * [out]    value[0].a	    Number of seconds
++ * [out]    value[0].b	    Number of nano seconds.
++ */
++#define OPTEE_RPC_CMD_GET_TIME		3
++
++/*
++ * Wait queue primitive, helper for secure world to implement a wait queue.
++ *
++ * If secure world needs to wait for a secure world mutex it issues a sleep
++ * request instead of spinning in secure world. Conversely is a wakeup
++ * request issued when a secure world mutex with a thread waiting thread is
++ * unlocked.
++ *
++ * Waiting on a key
++ * [in]    value[0].a	    OPTEE_RPC_WAIT_QUEUE_SLEEP
++ * [in]    value[0].b	    Wait key
++ *
++ * Waking up a key
++ * [in]    value[0].a	    OPTEE_RPC_WAIT_QUEUE_WAKEUP
++ * [in]    value[0].b	    Wakeup key
++ */
++#define OPTEE_RPC_CMD_WAIT_QUEUE	4
++#define OPTEE_RPC_WAIT_QUEUE_SLEEP	0
++#define OPTEE_RPC_WAIT_QUEUE_WAKEUP	1
++
++/*
++ * Suspend execution
++ *
++ * [in]    value[0].a	Number of milliseconds to suspend
++ */
++#define OPTEE_RPC_CMD_SUSPEND		5
++
++/*
++ * Allocate a piece of shared memory
++ *
++ * [in]    value[0].a	    Type of memory one of
++ *			    OPTEE_RPC_SHM_TYPE_* below
++ * [in]    value[0].b	    Requested size
++ * [in]    value[0].c	    Required alignment
++ * [out]   memref[0]	    Buffer
++ */
++#define OPTEE_RPC_CMD_SHM_ALLOC		6
++/* Memory that can be shared with a non-secure user space application */
++#define OPTEE_RPC_SHM_TYPE_APPL		0
++/* Memory only shared with non-secure kernel */
++#define OPTEE_RPC_SHM_TYPE_KERNEL	1
++
++/*
++ * Free shared memory previously allocated with OPTEE_RPC_CMD_SHM_ALLOC
++ *
++ * [in]     value[0].a	    Type of memory one of
++ *			    OPTEE_RPC_SHM_TYPE_* above
++ * [in]     value[0].b	    Value of shared memory reference or cookie
++ */
++#define OPTEE_RPC_CMD_SHM_FREE		7
++
++/*
++ * Issue master requests (read and write operations) to an I2C chip.
++ *
++ * [in]     value[0].a	    Transfer mode (OPTEE_RPC_I2C_TRANSFER_*)
++ * [in]     value[0].b	    The I2C bus (a.k.a adapter).
++ *				16 bit field.
++ * [in]     value[0].c	    The I2C chip (a.k.a address).
++ *				16 bit field (either 7 or 10 bit effective).
++ * [in]     value[1].a	    The I2C master control flags (ie, 10 bit address).
++ *				16 bit field.
++ * [in/out] memref[2]	    Buffer used for data transfers.
++ * [out]    value[3].a	    Number of bytes transferred by the REE.
++ */
++#define OPTEE_RPC_CMD_I2C_TRANSFER	21
++
++/* I2C master transfer modes */
++#define OPTEE_RPC_I2C_TRANSFER_RD	0
++#define OPTEE_RPC_I2C_TRANSFER_WR	1
++
++/* I2C master control flags */
++#define OPTEE_RPC_I2C_FLAGS_TEN_BIT	BIT(0)
++
++#endif /*__OPTEE_RPC_CMD_H*/
+diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h
+index 777ad54d4c2c..821e1c30c150 100644
+--- a/drivers/tee/optee/optee_smc.h
++++ b/drivers/tee/optee/optee_smc.h
+@@ -1,6 +1,6 @@
+ /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
+ /*
+- * Copyright (c) 2015-2019, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ #ifndef OPTEE_SMC_H
+ #define OPTEE_SMC_H
+@@ -39,10 +39,10 @@
+ /*
+  * Function specified by SMC Calling convention
+  *
+- * Return one of the following UIDs if using API specified in this file
+- * without further extentions:
+- * 65cb6b93-af0c-4617-8ed6-644a8d1140f8
+- * see also OPTEE_SMC_UID_* in optee_msg.h
++ * Return the following UID if using API specified in this file
++ * without further extensions:
++ * 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
++ * see also OPTEE_MSG_UID_* in optee_msg.h
+  */
+ #define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID
+ #define OPTEE_SMC_CALLS_UID \
+@@ -53,7 +53,7 @@
+ /*
+  * Function specified by SMC Calling convention
+  *
+- * Returns 2.0 if using API specified in this file without further extentions.
++ * Returns 2.0 if using API specified in this file without further extensions.
+  * see also OPTEE_MSG_REVISION_* in optee_msg.h
+  */
+ #define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION
+@@ -109,8 +109,8 @@ struct optee_smc_call_get_os_revision_result {
+  *
+  * Call register usage:
+  * a0	SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
+- * a1	Upper 32bit of a 64bit physical pointer to a struct optee_msg_arg
+- * a2	Lower 32bit of a 64bit physical pointer to a struct optee_msg_arg
++ * a1	Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg
++ * a2	Lower 32 bits of a 64-bit physical pointer to a struct optee_msg_arg
+  * a3	Cache settings, not used if physical pointer is in a predefined shared
+  *	memory area else per OPTEE_SMC_SHM_*
+  * a4-6	Not used
+@@ -214,8 +214,9 @@ struct optee_smc_get_shm_config_result {
+  * secure world accepts command buffers located in any parts of non-secure RAM
+  */
+ #define OPTEE_SMC_SEC_CAP_DYNAMIC_SHM		BIT(2)
+-
+-/* Secure world supports Shared Memory with a NULL buffer reference */
++/* Secure world is built with virtualization support */
++#define OPTEE_SMC_SEC_CAP_VIRTUALIZATION	BIT(3)
++/* Secure world supports Shared Memory with a NULL reference */
+ #define OPTEE_SMC_SEC_CAP_MEMREF_NULL		BIT(4)
+ 
+ #define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES	9
+@@ -245,8 +246,8 @@ struct optee_smc_exchange_capabilities_result {
+  *
+  * Normal return register usage:
+  * a0	OPTEE_SMC_RETURN_OK
+- * a1	Upper 32bit of a 64bit Shared memory cookie
+- * a2	Lower 32bit of a 64bit Shared memory cookie
++ * a1	Upper 32 bits of a 64-bit Shared memory cookie
++ * a2	Lower 32 bits of a 64-bit Shared memory cookie
+  * a3-7	Preserved
+  *
+  * Cache empty return register usage:
+@@ -293,6 +294,31 @@ struct optee_smc_disable_shm_cache_result {
+ #define OPTEE_SMC_ENABLE_SHM_CACHE \
+ 	OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE)
+ 
++/*
++ * Query OP-TEE about number of supported threads
++ *
++ * Normal World OS or Hypervisor issues this call to find out how many
++ * threads OP-TEE supports. That is how many standard calls can be issued
++ * in parallel before OP-TEE will return OPTEE_SMC_RETURN_ETHREAD_LIMIT.
++ *
++ * Call requests usage:
++ * a0	SMC Function ID, OPTEE_SMC_GET_THREAD_COUNT
++ * a1-6 Not used
++ * a7	Hypervisor Client ID register
++ *
++ * Normal return register usage:
++ * a0	OPTEE_SMC_RETURN_OK
++ * a1	Number of threads
++ * a2-7 Preserved
++ *
++ * Error return:
++ * a0	OPTEE_SMC_RETURN_UNKNOWN_FUNCTION   Requested call is not implemented
++ * a1-7	Preserved
++ */
++#define OPTEE_SMC_FUNCID_GET_THREAD_COUNT	15
++#define OPTEE_SMC_GET_THREAD_COUNT \
++	OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_THREAD_COUNT)
++
+ /*
+  * Resume from RPC (for example after processing a foreign interrupt)
+  *
+@@ -341,16 +367,16 @@ struct optee_smc_disable_shm_cache_result {
+  *
+  * "Return" register usage:
+  * a0	SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+- * a1	Upper 32bits of 64bit physical pointer to allocated
++ * a1	Upper 32 bits of 64-bit physical pointer to allocated
+  *	memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
+  *	be allocated.
+- * a2	Lower 32bits of 64bit physical pointer to allocated
++ * a2	Lower 32 bits of 64-bit physical pointer to allocated
+  *	memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
+  *	be allocated
+  * a3	Preserved
+- * a4	Upper 32bits of 64bit Shared memory cookie used when freeing
++ * a4	Upper 32 bits of 64-bit Shared memory cookie used when freeing
+  *	the memory or doing an RPC
+- * a5	Lower 32bits of 64bit Shared memory cookie used when freeing
++ * a5	Lower 32 bits of 64-bit Shared memory cookie used when freeing
+  *	the memory or doing an RPC
+  * a6-7	Preserved
+  */
+@@ -363,9 +389,9 @@ struct optee_smc_disable_shm_cache_result {
+  *
+  * "Call" register usage:
+  * a0	This value, OPTEE_SMC_RETURN_RPC_FREE
+- * a1	Upper 32bits of 64bit shared memory cookie belonging to this
++ * a1	Upper 32 bits of 64-bit shared memory cookie belonging to this
+  *	argument memory
+- * a2	Lower 32bits of 64bit shared memory cookie belonging to this
++ * a2	Lower 32 bits of 64-bit shared memory cookie belonging to this
+  *	argument memory
+  * a3-7	Resume information, must be preserved
+  *
+@@ -379,7 +405,7 @@ struct optee_smc_disable_shm_cache_result {
+ 	OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE)
+ 
+ /*
+- * Deliver foreign interrupt to normal world.
++ * Deliver a foreign interrupt in normal world.
+  *
+  * "Call" register usage:
+  * a0	OPTEE_SMC_RETURN_RPC_FOREIGN_INTR
+@@ -389,7 +415,7 @@ struct optee_smc_disable_shm_cache_result {
+  * a0	SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+  * a1-7	Preserved
+  */
+-#define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR		4
++#define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR	4
+ #define OPTEE_SMC_RETURN_RPC_FOREIGN_INTR \
+ 	OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FOREIGN_INTR)
+ 
+@@ -405,10 +431,10 @@ struct optee_smc_disable_shm_cache_result {
+  *
+  * "Call" register usage:
+  * a0	OPTEE_SMC_RETURN_RPC_CMD
+- * a1	Upper 32bit of a 64bit Shared memory cookie holding a
++ * a1	Upper 32 bits of a 64-bit Shared memory cookie holding a
+  *	struct optee_msg_arg, must be preserved, only the data should
+  *	be updated
+- * a2	Lower 32bit of a 64bit Shared memory cookie holding a
++ * a2	Lower 32 bits of a 64-bit Shared memory cookie holding a
+  *	struct optee_msg_arg, must be preserved, only the data should
+  *	be updated
+  * a3-7	Resume information, must be preserved
+diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
+index 6cbb3643c6c4..1849180b0278 100644
+--- a/drivers/tee/optee/rpc.c
++++ b/drivers/tee/optee/rpc.c
+@@ -12,6 +12,7 @@
+ #include <linux/tee_drv.h>
+ #include "optee_private.h"
+ #include "optee_smc.h"
++#include "optee_rpc_cmd.h"
+ 
+ struct wq_entry {
+ 	struct list_head link;
+@@ -90,7 +91,7 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+ 	if (!adapter)
+ 		goto bad;
+ 
+-	if (params[1].u.value.a & OPTEE_MSG_RPC_CMD_I2C_FLAGS_TEN_BIT) {
++	if (params[1].u.value.a & OPTEE_RPC_I2C_FLAGS_TEN_BIT) {
+ 		if (!i2c_check_functionality(adapter,
+ 					     I2C_FUNC_10BIT_ADDR)) {
+ 			i2c_put_adapter(adapter);
+@@ -105,10 +106,10 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+ 	msg.len  = params[2].u.memref.size;
+ 
+ 	switch (params[0].u.value.a) {
+-	case OPTEE_MSG_RPC_CMD_I2C_TRANSFER_RD:
++	case OPTEE_RPC_I2C_TRANSFER_RD:
+ 		msg.flags |= I2C_M_RD;
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_I2C_TRANSFER_WR:
++	case OPTEE_RPC_I2C_TRANSFER_WR:
+ 		break;
+ 	default:
+ 		i2c_put_adapter(adapter);
+@@ -195,10 +196,10 @@ static void handle_rpc_func_cmd_wq(struct optee *optee,
+ 		goto bad;
+ 
+ 	switch (arg->params[0].u.value.a) {
+-	case OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP:
++	case OPTEE_RPC_WAIT_QUEUE_SLEEP:
+ 		wq_sleep(&optee->wait_queue, arg->params[0].u.value.b);
+ 		break;
+-	case OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP:
++	case OPTEE_RPC_WAIT_QUEUE_WAKEUP:
+ 		wq_wakeup(&optee->wait_queue, arg->params[0].u.value.b);
+ 		break;
+ 	default:
+@@ -268,11 +269,11 @@ static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
+ 	struct tee_shm *shm;
+ 
+ 	param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
+-	param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
++	param.u.value.a = OPTEE_RPC_SHM_TYPE_APPL;
+ 	param.u.value.b = sz;
+ 	param.u.value.c = 0;
+ 
+-	ret = optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_ALLOC, 1, &param);
++	ret = optee_supp_thrd_req(ctx, OPTEE_RPC_CMD_SHM_ALLOC, 1, &param);
+ 	if (ret)
+ 		return ERR_PTR(-ENOMEM);
+ 
+@@ -309,10 +310,10 @@ static void handle_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
+ 
+ 	sz = arg->params[0].u.value.b;
+ 	switch (arg->params[0].u.value.a) {
+-	case OPTEE_MSG_RPC_SHM_TYPE_APPL:
++	case OPTEE_RPC_SHM_TYPE_APPL:
+ 		shm = cmd_alloc_suppl(ctx, sz);
+ 		break;
+-	case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
++	case OPTEE_RPC_SHM_TYPE_KERNEL:
+ 		shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED);
+ 		break;
+ 	default:
+@@ -384,7 +385,7 @@ static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
+ 	struct tee_param param;
+ 
+ 	param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
+-	param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
++	param.u.value.a = OPTEE_RPC_SHM_TYPE_APPL;
+ 	param.u.value.b = tee_shm_get_id(shm);
+ 	param.u.value.c = 0;
+ 
+@@ -401,7 +402,7 @@ static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
+ 	 */
+ 	tee_shm_put(shm);
+ 
+-	optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_FREE, 1, &param);
++	optee_supp_thrd_req(ctx, OPTEE_RPC_CMD_SHM_FREE, 1, &param);
+ }
+ 
+ static void handle_rpc_func_cmd_shm_free(struct tee_context *ctx,
+@@ -419,10 +420,10 @@ static void handle_rpc_func_cmd_shm_free(struct tee_context *ctx,
+ 
+ 	shm = (struct tee_shm *)(unsigned long)arg->params[0].u.value.b;
+ 	switch (arg->params[0].u.value.a) {
+-	case OPTEE_MSG_RPC_SHM_TYPE_APPL:
++	case OPTEE_RPC_SHM_TYPE_APPL:
+ 		cmd_free_suppl(ctx, shm);
+ 		break;
+-	case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
++	case OPTEE_RPC_SHM_TYPE_KERNEL:
+ 		tee_shm_free(shm);
+ 		break;
+ 	default:
+@@ -459,23 +460,23 @@ static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee,
+ 	}
+ 
+ 	switch (arg->cmd) {
+-	case OPTEE_MSG_RPC_CMD_GET_TIME:
++	case OPTEE_RPC_CMD_GET_TIME:
+ 		handle_rpc_func_cmd_get_time(arg);
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_WAIT_QUEUE:
++	case OPTEE_RPC_CMD_WAIT_QUEUE:
+ 		handle_rpc_func_cmd_wq(optee, arg);
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_SUSPEND:
++	case OPTEE_RPC_CMD_SUSPEND:
+ 		handle_rpc_func_cmd_wait(arg);
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_SHM_ALLOC:
++	case OPTEE_RPC_CMD_SHM_ALLOC:
+ 		free_pages_list(call_ctx);
+ 		handle_rpc_func_cmd_shm_alloc(ctx, arg, call_ctx);
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_SHM_FREE:
++	case OPTEE_RPC_CMD_SHM_FREE:
+ 		handle_rpc_func_cmd_shm_free(ctx, arg);
+ 		break;
+-	case OPTEE_MSG_RPC_CMD_I2C_TRANSFER:
++	case OPTEE_RPC_CMD_I2C_TRANSFER:
+ 		handle_rpc_func_cmd_i2c_transfer(ctx, arg);
+ 		break;
+ 	default:
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0012-optee-refactor-driver-with-internal-callbacks.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0012-optee-refactor-driver-with-internal-callbacks.patch
new file mode 100644
index 0000000..083843d
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0012-optee-refactor-driver-with-internal-callbacks.patch
@@ -0,0 +1,721 @@
+From abda5d14075802b84fe9e38f77bfdc371606172c Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Thu, 25 Mar 2021 15:08:50 +0100
+Subject: [PATCH 17/22] optee: refactor driver with internal callbacks
+
+The OP-TEE driver is refactored with three internal callbacks replacing
+direct calls to optee_from_msg_param(), optee_to_msg_param() and
+optee_do_call_with_arg().
+
+These functions a central to communicating with OP-TEE in secure world
+by using the SMC Calling Convention directly.
+
+This refactoring makes room for using other primitives to communicate
+with OP-TEE in secure world while being able to reuse as much as
+possible from the present driver.
+
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/tee/optee/call.c          |  86 +++++++++--------
+ drivers/tee/optee/core.c          | 148 ++++++++++++++++++++----------
+ drivers/tee/optee/optee_private.h |  35 +++++--
+ drivers/tee/optee/rpc.c           |  19 ++--
+ 4 files changed, 182 insertions(+), 106 deletions(-)
+
+diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
+index 1b339b743ff5..e7b93153252c 100644
+--- a/drivers/tee/optee/call.c
++++ b/drivers/tee/optee/call.c
+@@ -1,6 +1,6 @@
+ // SPDX-License-Identifier: GPL-2.0-only
+ /*
+- * Copyright (c) 2015, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ #include <linux/arm-smccc.h>
+ #include <linux/device.h>
+@@ -116,20 +116,25 @@ static struct optee_session *find_session(struct optee_context_data *ctxdata,
+ /**
+  * optee_do_call_with_arg() - Do an SMC to OP-TEE in secure world
+  * @ctx:	calling context
+- * @parg:	physical address of message to pass to secure world
++ * @arg:	shared memory holding the message to pass to secure world
+  *
+  * Does and SMC to OP-TEE in secure world and handles eventual resulting
+  * Remote Procedure Calls (RPC) from OP-TEE.
+  *
+  * Returns return code from secure world, 0 is OK
+  */
+-u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
++int optee_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg)
+ {
+ 	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_call_waiter w;
+ 	struct optee_rpc_param param = { };
+ 	struct optee_call_ctx call_ctx = { };
+-	u32 ret;
++	phys_addr_t parg;
++	int rc;
++
++	rc = tee_shm_get_pa(arg, 0, &parg);
++	if (rc)
++		return rc;
+ 
+ 	param.a0 = OPTEE_SMC_CALL_WITH_ARG;
+ 	reg_pair_from_64(&param.a1, &param.a2, parg);
+@@ -157,7 +162,7 @@ u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
+ 			param.a3 = res.a3;
+ 			optee_handle_rpc(ctx, &param, &call_ctx);
+ 		} else {
+-			ret = res.a0;
++			rc = res.a0;
+ 			break;
+ 		}
+ 	}
+@@ -169,14 +174,12 @@ u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
+ 	 */
+ 	optee_cq_wait_final(&optee->call_queue, &w);
+ 
+-	return ret;
++	return rc;
+ }
+ 
+ static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params,
+-				   struct optee_msg_arg **msg_arg,
+-				   phys_addr_t *msg_parg)
++				   struct optee_msg_arg **msg_arg)
+ {
+-	int rc;
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *ma;
+ 
+@@ -187,22 +190,13 @@ static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params,
+ 
+ 	ma = tee_shm_get_va(shm, 0);
+ 	if (IS_ERR(ma)) {
+-		rc = PTR_ERR(ma);
+-		goto out;
++		tee_shm_free(shm);
++		return (void *)ma;
+ 	}
+ 
+-	rc = tee_shm_get_pa(shm, 0, msg_parg);
+-	if (rc)
+-		goto out;
+-
+ 	memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params));
+ 	ma->num_params = num_params;
+ 	*msg_arg = ma;
+-out:
+-	if (rc) {
+-		tee_shm_free(shm);
+-		return ERR_PTR(rc);
+-	}
+ 
+ 	return shm;
+ }
+@@ -211,16 +205,16 @@ int optee_open_session(struct tee_context *ctx,
+ 		       struct tee_ioctl_open_session_arg *arg,
+ 		       struct tee_param *param)
+ {
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_context_data *ctxdata = ctx->data;
+ 	int rc;
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *msg_arg;
+-	phys_addr_t msg_parg;
+ 	struct optee_session *sess = NULL;
+ 	uuid_t client_uuid;
+ 
+ 	/* +2 for the meta parameters added below */
+-	shm = get_msg_arg(ctx, arg->num_params + 2, &msg_arg, &msg_parg);
++	shm = get_msg_arg(ctx, arg->num_params + 2, &msg_arg);
+ 	if (IS_ERR(shm))
+ 		return PTR_ERR(shm);
+ 
+@@ -244,7 +238,8 @@ int optee_open_session(struct tee_context *ctx,
+ 		goto out;
+ 	export_uuid(msg_arg->params[1].u.octets, &client_uuid);
+ 
+-	rc = optee_to_msg_param(msg_arg->params + 2, arg->num_params, param);
++	rc = optee->ops->to_msg_param(optee, msg_arg->params + 2,
++				      arg->num_params, param);
+ 	if (rc)
+ 		goto out;
+ 
+@@ -254,7 +249,7 @@ int optee_open_session(struct tee_context *ctx,
+ 		goto out;
+ 	}
+ 
+-	if (optee_do_call_with_arg(ctx, msg_parg)) {
++	if (optee->ops->do_call_with_arg(ctx, shm)) {
+ 		msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ 		msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ 	}
+@@ -269,7 +264,8 @@ int optee_open_session(struct tee_context *ctx,
+ 		kfree(sess);
+ 	}
+ 
+-	if (optee_from_msg_param(param, arg->num_params, msg_arg->params + 2)) {
++	if (optee->ops->from_msg_param(optee, param, arg->num_params,
++				       msg_arg->params + 2)) {
+ 		arg->ret = TEEC_ERROR_COMMUNICATION;
+ 		arg->ret_origin = TEEC_ORIGIN_COMMS;
+ 		/* Close session again to avoid leakage */
+@@ -288,16 +284,16 @@ int optee_open_session(struct tee_context *ctx,
+ int optee_close_session_helper(struct tee_context *ctx, u32 session)
+ {
+ 	struct tee_shm *shm;
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_msg_arg *msg_arg;
+-	phys_addr_t msg_parg;
+ 
+-	shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
++	shm = get_msg_arg(ctx, 0, &msg_arg);
+ 	if (IS_ERR(shm))
+ 		return PTR_ERR(shm);
+ 
+ 	msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
+ 	msg_arg->session = session;
+-	optee_do_call_with_arg(ctx, msg_parg);
++	optee->ops->do_call_with_arg(ctx, shm);
+ 
+ 	tee_shm_free(shm);
+ 
+@@ -325,10 +321,10 @@ int optee_close_session(struct tee_context *ctx, u32 session)
+ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ 		      struct tee_param *param)
+ {
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_context_data *ctxdata = ctx->data;
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *msg_arg;
+-	phys_addr_t msg_parg;
+ 	struct optee_session *sess;
+ 	int rc;
+ 
+@@ -339,7 +335,7 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ 	if (!sess)
+ 		return -EINVAL;
+ 
+-	shm = get_msg_arg(ctx, arg->num_params, &msg_arg, &msg_parg);
++	shm = get_msg_arg(ctx, arg->num_params, &msg_arg);
+ 	if (IS_ERR(shm))
+ 		return PTR_ERR(shm);
+ 	msg_arg->cmd = OPTEE_MSG_CMD_INVOKE_COMMAND;
+@@ -347,16 +343,18 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ 	msg_arg->session = arg->session;
+ 	msg_arg->cancel_id = arg->cancel_id;
+ 
+-	rc = optee_to_msg_param(msg_arg->params, arg->num_params, param);
++	rc = optee->ops->to_msg_param(optee, msg_arg->params, arg->num_params,
++				      param);
+ 	if (rc)
+ 		goto out;
+ 
+-	if (optee_do_call_with_arg(ctx, msg_parg)) {
++	if (optee->ops->do_call_with_arg(ctx, shm)) {
+ 		msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ 		msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ 	}
+ 
+-	if (optee_from_msg_param(param, arg->num_params, msg_arg->params)) {
++	if (optee->ops->from_msg_param(optee, param, arg->num_params,
++				       msg_arg->params)) {
+ 		msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ 		msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ 	}
+@@ -370,10 +368,10 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ 
+ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session)
+ {
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_context_data *ctxdata = ctx->data;
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *msg_arg;
+-	phys_addr_t msg_parg;
+ 	struct optee_session *sess;
+ 
+ 	/* Check that the session is valid */
+@@ -383,14 +381,14 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session)
+ 	if (!sess)
+ 		return -EINVAL;
+ 
+-	shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
++	shm = get_msg_arg(ctx, 0, &msg_arg);
+ 	if (IS_ERR(shm))
+ 		return PTR_ERR(shm);
+ 
+ 	msg_arg->cmd = OPTEE_MSG_CMD_CANCEL;
+ 	msg_arg->session = session;
+ 	msg_arg->cancel_id = cancel_id;
+-	optee_do_call_with_arg(ctx, msg_parg);
++	optee->ops->do_call_with_arg(ctx, shm);
+ 
+ 	tee_shm_free(shm);
+ 	return 0;
+@@ -589,10 +587,10 @@ int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
+ 		       struct page **pages, size_t num_pages,
+ 		       unsigned long start)
+ {
+-	struct tee_shm *shm_arg = NULL;
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_msg_arg *msg_arg;
++	struct tee_shm *shm_arg;
+ 	u64 *pages_list;
+-	phys_addr_t msg_parg;
+ 	int rc;
+ 
+ 	if (!num_pages)
+@@ -606,7 +604,7 @@ int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
+ 	if (!pages_list)
+ 		return -ENOMEM;
+ 
+-	shm_arg = get_msg_arg(ctx, 1, &msg_arg, &msg_parg);
++	shm_arg = get_msg_arg(ctx, 1, &msg_arg);
+ 	if (IS_ERR(shm_arg)) {
+ 		rc = PTR_ERR(shm_arg);
+ 		goto out;
+@@ -627,7 +625,7 @@ int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
+ 	msg_arg->params->u.tmem.buf_ptr = virt_to_phys(pages_list) |
+ 	  (tee_shm_get_page_offset(shm) & (OPTEE_MSG_NONCONTIG_PAGE_SIZE - 1));
+ 
+-	if (optee_do_call_with_arg(ctx, msg_parg) ||
++	if (optee->ops->do_call_with_arg(ctx, shm) ||
+ 	    msg_arg->ret != TEEC_SUCCESS)
+ 		rc = -EINVAL;
+ 
+@@ -639,12 +637,12 @@ int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
+ 
+ int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm)
+ {
+-	struct tee_shm *shm_arg;
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct optee_msg_arg *msg_arg;
+-	phys_addr_t msg_parg;
++	struct tee_shm *shm_arg;
+ 	int rc = 0;
+ 
+-	shm_arg = get_msg_arg(ctx, 1, &msg_arg, &msg_parg);
++	shm_arg = get_msg_arg(ctx, 1, &msg_arg);
+ 	if (IS_ERR(shm_arg))
+ 		return PTR_ERR(shm_arg);
+ 
+@@ -653,7 +651,7 @@ int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm)
+ 	msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
+ 	msg_arg->params[0].u.rmem.shm_ref = (unsigned long)shm;
+ 
+-	if (optee_do_call_with_arg(ctx, msg_parg) ||
++	if (optee->ops->do_call_with_arg(ctx, shm) ||
+ 	    msg_arg->ret != TEEC_SUCCESS)
+ 		rc = -EINVAL;
+ 	tee_shm_free(shm_arg);
+diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
+index e39c6d290d83..ab602bb8e14a 100644
+--- a/drivers/tee/optee/core.c
++++ b/drivers/tee/optee/core.c
+@@ -1,6 +1,6 @@
+ // SPDX-License-Identifier: GPL-2.0-only
+ /*
+- * Copyright (c) 2015, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ 
+ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+@@ -26,21 +26,87 @@
+ 
+ #define OPTEE_SHM_NUM_PRIV_PAGES	CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
+ 
++static void from_msg_param_value(struct tee_param *p, u32 attr,
++				 const struct optee_msg_param *mp)
++{
++	p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
++		  attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
++	p->u.value.a = mp->u.value.a;
++	p->u.value.b = mp->u.value.b;
++	p->u.value.c = mp->u.value.c;
++}
++
++static int from_msg_param_tmp_mem(struct tee_param *p, u32 attr,
++				  const struct optee_msg_param *mp)
++{
++	struct tee_shm *shm;
++	phys_addr_t pa;
++	int rc;
++
++	p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
++		  attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT;
++	p->u.memref.size = mp->u.tmem.size;
++	shm = (struct tee_shm *)(unsigned long)mp->u.tmem.shm_ref;
++	if (!shm) {
++		p->u.memref.shm_offs = 0;
++		p->u.memref.shm = NULL;
++		return 0;
++	}
++
++	rc = tee_shm_get_pa(shm, 0, &pa);
++	if (rc)
++		return rc;
++
++	p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
++	p->u.memref.shm = shm;
++
++	/* Check that the memref is covered by the shm object */
++	if (p->u.memref.size) {
++		size_t o = p->u.memref.shm_offs +
++			   p->u.memref.size - 1;
++
++		rc = tee_shm_get_pa(shm, o, NULL);
++		if (rc)
++			return rc;
++	}
++
++	return 0;
++}
++
++static void from_msg_param_reg_mem(struct tee_param *p, u32 attr,
++				   const struct optee_msg_param *mp)
++{
++	struct tee_shm *shm;
++
++	p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
++		  attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
++	p->u.memref.size = mp->u.rmem.size;
++	shm = (struct tee_shm *)(unsigned long)mp->u.rmem.shm_ref;
++
++	if (shm) {
++		p->u.memref.shm_offs = mp->u.rmem.offs;
++		p->u.memref.shm = shm;
++	} else {
++		p->u.memref.shm_offs = 0;
++		p->u.memref.shm = NULL;
++	}
++}
++
+ /**
+  * optee_from_msg_param() - convert from OPTEE_MSG parameters to
+  *			    struct tee_param
++ * @optee:	main service struct
+  * @params:	subsystem internal parameter representation
+  * @num_params:	number of elements in the parameter arrays
+  * @msg_params:	OPTEE_MSG parameters
+  * Returns 0 on success or <0 on failure
+  */
+-int optee_from_msg_param(struct tee_param *params, size_t num_params,
+-			 const struct optee_msg_param *msg_params)
++static int optee_from_msg_param(struct optee *optee, struct tee_param *params,
++				size_t num_params,
++				const struct optee_msg_param *msg_params)
+ {
+ 	int rc;
+ 	size_t n;
+-	struct tee_shm *shm;
+-	phys_addr_t pa;
+ 
+ 	for (n = 0; n < num_params; n++) {
+ 		struct tee_param *p = params + n;
+@@ -55,48 +121,19 @@ int optee_from_msg_param(struct tee_param *params, size_t num_params,
+ 		case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
+-			p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
+-				  attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
+-			p->u.value.a = mp->u.value.a;
+-			p->u.value.b = mp->u.value.b;
+-			p->u.value.c = mp->u.value.c;
++			from_msg_param_value(p, attr, mp);
+ 			break;
+ 		case OPTEE_MSG_ATTR_TYPE_TMEM_INPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_TMEM_INOUT:
+-			p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
+-				  attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT;
+-			p->u.memref.size = mp->u.tmem.size;
+-			shm = (struct tee_shm *)(unsigned long)
+-				mp->u.tmem.shm_ref;
+-			if (!shm) {
+-				p->u.memref.shm_offs = 0;
+-				p->u.memref.shm = NULL;
+-				break;
+-			}
+-			rc = tee_shm_get_pa(shm, 0, &pa);
++			rc = from_msg_param_tmp_mem(p, attr, mp);
+ 			if (rc)
+ 				return rc;
+-			p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
+-			p->u.memref.shm = shm;
+ 			break;
+ 		case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
+ 		case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
+-			p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
+-				  attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
+-			p->u.memref.size = mp->u.rmem.size;
+-			shm = (struct tee_shm *)(unsigned long)
+-				mp->u.rmem.shm_ref;
+-
+-			if (!shm) {
+-				p->u.memref.shm_offs = 0;
+-				p->u.memref.shm = NULL;
+-				break;
+-			}
+-			p->u.memref.shm_offs = mp->u.rmem.offs;
+-			p->u.memref.shm = shm;
+-
++			from_msg_param_reg_mem(p, attr, mp);
+ 			break;
+ 
+ 		default:
+@@ -106,6 +143,16 @@ int optee_from_msg_param(struct tee_param *params, size_t num_params,
+ 	return 0;
+ }
+ 
++static void to_msg_param_value(struct optee_msg_param *mp,
++			       const struct tee_param *p)
++{
++	mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
++		   TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
++	mp->u.value.a = p->u.value.a;
++	mp->u.value.b = p->u.value.b;
++	mp->u.value.c = p->u.value.c;
++}
++
+ static int to_msg_param_tmp_mem(struct optee_msg_param *mp,
+ 				const struct tee_param *p)
+ {
+@@ -148,13 +195,15 @@ static int to_msg_param_reg_mem(struct optee_msg_param *mp,
+ 
+ /**
+  * optee_to_msg_param() - convert from struct tee_params to OPTEE_MSG parameters
++ * @optee:	main service struct
+  * @msg_params:	OPTEE_MSG parameters
+  * @num_params:	number of elements in the parameter arrays
+  * @params:	subsystem itnernal parameter representation
+  * Returns 0 on success or <0 on failure
+  */
+-int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
+-		       const struct tee_param *params)
++static int optee_to_msg_param(struct optee *optee,
++			      struct optee_msg_param *msg_params,
++			      size_t num_params, const struct tee_param *params)
+ {
+ 	int rc;
+ 	size_t n;
+@@ -171,11 +220,7 @@ int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
+ 		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
+ 		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
+ 		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
+-			mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
+-				   TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
+-			mp->u.value.a = p->u.value.a;
+-			mp->u.value.b = p->u.value.b;
+-			mp->u.value.c = p->u.value.c;
++			to_msg_param_value(mp, p);
+ 			break;
+ 		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
+ 		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
+@@ -301,7 +346,7 @@ static void optee_release_supp(struct tee_context *ctx)
+ 	optee_supp_release(&optee->supp);
+ }
+ 
+-static const struct tee_driver_ops optee_ops = {
++static const struct tee_driver_ops optee_clnt_ops = {
+ 	.get_version = optee_get_version,
+ 	.open = optee_open,
+ 	.release = optee_release,
+@@ -313,9 +358,9 @@ static const struct tee_driver_ops optee_ops = {
+ 	.shm_unregister = optee_shm_unregister,
+ };
+ 
+-static const struct tee_desc optee_desc = {
++static const struct tee_desc optee_clnt_desc = {
+ 	.name = DRIVER_NAME "-clnt",
+-	.ops = &optee_ops,
++	.ops = &optee_clnt_ops,
+ 	.owner = THIS_MODULE,
+ };
+ 
+@@ -336,6 +381,12 @@ static const struct tee_desc optee_supp_desc = {
+ 	.flags = TEE_DESC_PRIVILEGED,
+ };
+ 
++static const struct optee_ops optee_ops = {
++	.do_call_with_arg = optee_do_call_with_arg,
++	.to_msg_param = optee_to_msg_param,
++	.from_msg_param = optee_from_msg_param,
++};
++
+ static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
+ {
+ 	struct arm_smccc_res res;
+@@ -637,10 +688,11 @@ static int optee_probe(struct platform_device *pdev)
+ 		goto err;
+ 	}
+ 
++	optee->ops = &optee_ops;
+ 	optee->invoke_fn = invoke_fn;
+ 	optee->sec_caps = sec_caps;
+ 
+-	teedev = tee_device_alloc(&optee_desc, NULL, pool, optee);
++	teedev = tee_device_alloc(&optee_clnt_desc, NULL, pool, optee);
+ 	if (IS_ERR(teedev)) {
+ 		rc = PTR_ERR(teedev);
+ 		goto err;
+diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
+index 2b63b796645e..c5741e96e967 100644
+--- a/drivers/tee/optee/optee_private.h
++++ b/drivers/tee/optee/optee_private.h
+@@ -1,6 +1,6 @@
+ /* SPDX-License-Identifier: GPL-2.0-only */
+ /*
+- * Copyright (c) 2015, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ 
+ #ifndef OPTEE_PRIVATE_H
+@@ -66,9 +66,34 @@ struct optee_supp {
+ 	struct completion reqs_c;
+ };
+ 
++struct optee;
++
++/**
++ * struct optee_ops - OP-TEE driver internal operations
++ * @do_call_with_arg:	enters OP-TEE in secure world
++ * @to_msg_param:	converts from struct tee_param to OPTEE_MSG parameters
++ * @from_msg_param:	converts from OPTEE_MSG parameters to struct tee_param
++ *
++ * These OPs are only supposed to be used internally in the OP-TEE driver
++ * as a way of abstracting the different methogs of entering OP-TEE in
++ * secure world.
++ */
++struct optee_ops {
++	int (*do_call_with_arg)(struct tee_context *ctx,
++				struct tee_shm *shm_arg);
++	int (*to_msg_param)(struct optee *optee,
++			    struct optee_msg_param *msg_params,
++			    size_t num_params, const struct tee_param *params);
++	int (*from_msg_param)(struct optee *optee, struct tee_param *params,
++			      size_t num_params,
++			      const struct optee_msg_param *msg_params);
++};
++
+ /**
+  * struct optee - main service struct
+  * @supp_teedev:	supplicant device
++ * @ops:		internal callbacks for different ways to reach secure
++ *			world
+  * @teedev:		client device
+  * @invoke_fn:		function to issue smc or hvc
+  * @call_queue:		queue of threads waiting to call @invoke_fn
+@@ -86,6 +111,7 @@ struct optee_supp {
+ struct optee {
+ 	struct tee_device *supp_teedev;
+ 	struct tee_device *teedev;
++	const struct optee_ops *ops;
+ 	optee_invoke_fn *invoke_fn;
+ 	struct optee_call_queue call_queue;
+ 	struct optee_wait_queue wait_queue;
+@@ -148,7 +174,7 @@ int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
+ int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
+ 		    struct tee_param *param);
+ 
+-u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg);
++int optee_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg);
+ int optee_open_session(struct tee_context *ctx,
+ 		       struct tee_ioctl_open_session_arg *arg,
+ 		       struct tee_param *param);
+@@ -171,11 +197,6 @@ int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
+ 			    unsigned long start);
+ int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm);
+ 
+-int optee_from_msg_param(struct tee_param *params, size_t num_params,
+-			 const struct optee_msg_param *msg_params);
+-int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
+-		       const struct tee_param *params);
+-
+ u64 *optee_allocate_pages_list(size_t num_entries);
+ void optee_free_pages_list(void *array, size_t num_entries);
+ void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages,
+diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
+index 1849180b0278..39562fb6841e 100644
+--- a/drivers/tee/optee/rpc.c
++++ b/drivers/tee/optee/rpc.c
+@@ -1,6 +1,6 @@
+ // SPDX-License-Identifier: GPL-2.0-only
+ /*
+- * Copyright (c) 2015-2016, Linaro Limited
++ * Copyright (c) 2015-2021, Linaro Limited
+  */
+ 
+ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+@@ -55,6 +55,7 @@ static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
+ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+ 					     struct optee_msg_arg *arg)
+ {
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
+ 	struct tee_param *params;
+ 	struct i2c_adapter *adapter;
+ 	struct i2c_msg msg = { };
+@@ -79,7 +80,8 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+ 		return;
+ 	}
+ 
+-	if (optee_from_msg_param(params, arg->num_params, arg->params))
++	if (optee->ops->from_msg_param(optee, params, arg->num_params,
++				       arg->params))
+ 		goto bad;
+ 
+ 	for (i = 0; i < arg->num_params; i++) {
+@@ -122,7 +124,8 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+ 		arg->ret = TEEC_ERROR_COMMUNICATION;
+ 	} else {
+ 		params[3].u.value.a = msg.len;
+-		if (optee_to_msg_param(arg->params, arg->num_params, params))
++		if (optee->ops->to_msg_param(optee, arg->params,
++					     arg->num_params, params))
+ 			arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+ 		else
+ 			arg->ret = TEEC_SUCCESS;
+@@ -234,7 +237,7 @@ static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
+ 	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+ }
+ 
+-static void handle_rpc_supp_cmd(struct tee_context *ctx,
++static void handle_rpc_supp_cmd(struct tee_context *ctx, struct optee *optee,
+ 				struct optee_msg_arg *arg)
+ {
+ 	struct tee_param *params;
+@@ -248,14 +251,16 @@ static void handle_rpc_supp_cmd(struct tee_context *ctx,
+ 		return;
+ 	}
+ 
+-	if (optee_from_msg_param(params, arg->num_params, arg->params)) {
++	if (optee->ops->from_msg_param(optee, params, arg->num_params,
++				       arg->params)) {
+ 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+ 		goto out;
+ 	}
+ 
+ 	arg->ret = optee_supp_thrd_req(ctx, arg->cmd, arg->num_params, params);
+ 
+-	if (optee_to_msg_param(arg->params, arg->num_params, params))
++	if (optee->ops->to_msg_param(optee, arg->params, arg->num_params,
++				     params))
+ 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+ out:
+ 	kfree(params);
+@@ -480,7 +485,7 @@ static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee,
+ 		handle_rpc_func_cmd_i2c_transfer(ctx, arg);
+ 		break;
+ 	default:
+-		handle_rpc_supp_cmd(ctx, arg);
++		handle_rpc_supp_cmd(ctx, optee, arg);
+ 	}
+ }
+ 
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0013-optee-add-a-FF-A-memory-pool.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0013-optee-add-a-FF-A-memory-pool.patch
new file mode 100644
index 0000000..6be1581
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0013-optee-add-a-FF-A-memory-pool.patch
@@ -0,0 +1,131 @@
+From eafffa586795e3cb485310fbd287322c9c7dc3bb Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Thu, 25 Mar 2021 15:08:52 +0100
+Subject: [PATCH 18/22] optee: add a FF-A memory pool
+
+Adds a memory pool to be used when the driver uses FF-A [1] as transport
+layer.
+
+[1] https://developer.arm.com/documentation/den0077/latest
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/tee/optee/shm_pool.c | 65 +++++++++++++++++++++++++++++++++---
+ drivers/tee/optee/shm_pool.h |  1 +
+ 2 files changed, 61 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
+index d767eebf30bd..d2116cb39c8b 100644
+--- a/drivers/tee/optee/shm_pool.c
++++ b/drivers/tee/optee/shm_pool.c
+@@ -12,8 +12,14 @@
+ #include "optee_smc.h"
+ #include "shm_pool.h"
+ 
+-static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
+-			 struct tee_shm *shm, size_t size)
++static int
++pool_op_alloc_helper(struct tee_shm_pool_mgr *poolm,
++		     struct tee_shm *shm, size_t size,
++		     int (*shm_register)(struct tee_context *ctx,
++					 struct tee_shm *shm,
++					 struct page **pages,
++					 size_t num_pages,
++					 unsigned long start))
+ {
+ 	unsigned int order = get_order(size);
+ 	struct page *page;
+@@ -27,7 +33,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
+ 	shm->paddr = page_to_phys(page);
+ 	shm->size = PAGE_SIZE << order;
+ 
+-	if (shm->flags & TEE_SHM_DMA_BUF) {
++	if (shm_register) {
+ 		unsigned int nr_pages = 1 << order, i;
+ 		struct page **pages;
+ 
+@@ -41,14 +47,23 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
+ 		}
+ 
+ 		shm->flags |= TEE_SHM_REGISTER;
+-		rc = optee_shm_register(shm->ctx, shm, pages, nr_pages,
+-					(unsigned long)shm->kaddr);
++		rc = shm_register(shm->ctx, shm, pages, nr_pages,
++				  (unsigned long)shm->kaddr);
+ 		kfree(pages);
+ 	}
+ 
+ 	return rc;
+ }
+ 
++static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
++			 struct tee_shm *shm, size_t size)
++{
++	if (!(shm->flags & TEE_SHM_DMA_BUF))
++		return pool_op_alloc_helper(poolm, shm, size, NULL);
++
++	return pool_op_alloc_helper(poolm, shm, size, optee_shm_register);
++}
++
+ static void pool_op_free(struct tee_shm_pool_mgr *poolm,
+ 			 struct tee_shm *shm)
+ {
+@@ -87,3 +102,43 @@ struct tee_shm_pool_mgr *optee_shm_pool_alloc_pages(void)
+ 
+ 	return mgr;
+ }
++
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++static int pool_ffa_op_alloc(struct tee_shm_pool_mgr *poolm,
++			     struct tee_shm *shm, size_t size)
++{
++	return pool_op_alloc_helper(poolm, shm, size, optee_ffa_shm_register);
++}
++
++static void pool_ffa_op_free(struct tee_shm_pool_mgr *poolm,
++			     struct tee_shm *shm)
++{
++	optee_ffa_shm_unregister(shm->ctx, shm);
++	free_pages((unsigned long)shm->kaddr, get_order(shm->size));
++	shm->kaddr = NULL;
++}
++
++static const struct tee_shm_pool_mgr_ops pool_ffa_ops = {
++	.alloc = pool_ffa_op_alloc,
++	.free = pool_ffa_op_free,
++	.destroy_poolmgr = pool_op_destroy_poolmgr,
++};
++
++/**
++ * optee_ffa_shm_pool_alloc_pages() - create page-based allocator pool
++ *
++ * This pool is used with OP-TEE over FF-A. In this case command buffers
++ * and such are allocated from kernel's own memory.
++ */
++struct tee_shm_pool_mgr *optee_ffa_shm_pool_alloc_pages(void)
++{
++	struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
++
++	if (!mgr)
++		return ERR_PTR(-ENOMEM);
++
++	mgr->ops = &pool_ffa_ops;
++
++	return mgr;
++}
++#endif /*CONFIG_ARM_FFA_TRANSPORT*/
+diff --git a/drivers/tee/optee/shm_pool.h b/drivers/tee/optee/shm_pool.h
+index 28109d991c4b..34c5fd74a3ff 100644
+--- a/drivers/tee/optee/shm_pool.h
++++ b/drivers/tee/optee/shm_pool.h
+@@ -10,5 +10,6 @@
+ #include <linux/tee_drv.h>
+ 
+ struct tee_shm_pool_mgr *optee_shm_pool_alloc_pages(void);
++struct tee_shm_pool_mgr *optee_ffa_shm_pool_alloc_pages(void);
+ 
+ #endif
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0014-optee-add-FF-A-support.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0014-optee-add-FF-A-support.patch
new file mode 100644
index 0000000..faf6cd0
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0014-optee-add-FF-A-support.patch
@@ -0,0 +1,1270 @@
+From 5665ffd3fb8e94003abc1c0c05c9fa30d4028b67 Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Thu, 25 Mar 2021 15:08:53 +0100
+Subject: [PATCH 19/22] optee: add FF-A support
+
+Adds support for using FF-A [1] as transport to the OP-TEE driver.
+
+Introduces struct optee_msg_param_fmem which carries all information
+needed when OP-TEE is calling FFA_MEM_RETRIEVE_REQ to get the shared
+memory reference mapped by the hypervisor in S-EL2. Register usage is
+also updated to include the information needed.
+
+The FF-A part of this driver is enabled if CONFIG_ARM_FFA_TRANSPORT is
+enabled.
+
+[1] https://developer.arm.com/documentation/den0077/latest
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/tee/optee/call.c          | 212 ++++++++++++-
+ drivers/tee/optee/core.c          | 486 +++++++++++++++++++++++++++++-
+ drivers/tee/optee/optee_ffa.h     | 153 ++++++++++
+ drivers/tee/optee/optee_msg.h     |  27 +-
+ drivers/tee/optee/optee_private.h |  52 ++++
+ drivers/tee/optee/rpc.c           | 118 ++++++++
+ 6 files changed, 1040 insertions(+), 8 deletions(-)
+ create mode 100644 drivers/tee/optee/optee_ffa.h
+
+diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
+index e7b93153252c..cf91a81a242a 100644
+--- a/drivers/tee/optee/call.c
++++ b/drivers/tee/optee/call.c
+@@ -3,15 +3,18 @@
+  * Copyright (c) 2015-2021, Linaro Limited
+  */
+ #include <linux/arm-smccc.h>
++#include <linux/arm_ffa.h>
+ #include <linux/device.h>
+ #include <linux/err.h>
+ #include <linux/errno.h>
+ #include <linux/mm.h>
+ #include <linux/sched.h>
++#include <linux/scatterlist.h>
+ #include <linux/slab.h>
+ #include <linux/tee_drv.h>
+ #include <linux/types.h>
+ #include <linux/uaccess.h>
++#include "optee_ffa.h"
+ #include "optee_private.h"
+ #include "optee_smc.h"
+ 
+@@ -180,11 +183,21 @@ int optee_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg)
+ static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params,
+ 				   struct optee_msg_arg **msg_arg)
+ {
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++	size_t sz = OPTEE_MSG_GET_ARG_SIZE(num_params);
+ 	struct tee_shm *shm;
+ 	struct optee_msg_arg *ma;
+ 
+-	shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params),
+-			    TEE_SHM_MAPPED);
++	/*
++	 * rpc_arg_count is set to the number of allocated parameters in
++	 * the RPC argument struct if a second MSG arg struct is expected.
++	 * The second arg struct will then be used for RPC. So far only
++	 * enabled when using FF-A as transport layer.
++	 */
++	if (optee->rpc_arg_count)
++		sz += OPTEE_MSG_GET_ARG_SIZE(optee->rpc_arg_count);
++
++	shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED);
+ 	if (IS_ERR(shm))
+ 		return shm;
+ 
+@@ -673,3 +686,198 @@ int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm)
+ {
+ 	return 0;
+ }
++
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++static int optee_ffa_yielding_call(struct tee_context *ctx,
++				   struct ffa_send_direct_data *data,
++				   struct optee_msg_arg *rpc_arg)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++	const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
++	struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
++	struct optee_call_waiter w;
++	u32 cmd = data->data0;
++	u32 w4 = data->data1;
++	u32 w5 = data->data2;
++	u32 w6 = data->data3;
++	int rc;
++
++	/* Initialize waiter */
++	optee_cq_wait_init(&optee->call_queue, &w);
++	while (true) {
++		rc = ffa_ops->sync_send_receive(ffa_dev, data);
++		if (rc)
++			goto done;
++
++		switch ((int)data->data0) {
++		case TEEC_SUCCESS:
++			break;
++		case TEEC_ERROR_BUSY:
++			if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) {
++				rc = -EIO;
++				goto done;
++			}
++
++			/*
++			 * Out of threads in secure world, wait for a thread
++			 * become available.
++			 */
++			optee_cq_wait_for_completion(&optee->call_queue, &w);
++			data->data0 = cmd;
++			data->data1 = w4;
++			data->data2 = w5;
++			data->data3 = w6;
++			continue;
++		default:
++			rc = -EIO;
++			goto done;
++		}
++
++		if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE)
++			goto done;
++
++		/*
++		 * OP-TEE has returned with a RPC request.
++		 *
++		 * Note that data->data4 (passed in register w7) is already
++		 * filled in by ffa_ops->sync_send_receive() returning
++		 * above.
++		 */
++		cond_resched();
++		optee_handle_ffa_rpc(ctx, data->data1, rpc_arg);
++		cmd = OPTEE_FFA_YIELDING_CALL_RESUME;
++		data->data0 = cmd;
++		data->data1 = 0;
++		data->data2 = 0;
++		data->data3 = 0;
++	}
++done:
++	/*
++	 * We're done with our thread in secure world, if there's any
++	 * thread waiters wake up one.
++	 */
++	optee_cq_wait_final(&optee->call_queue, &w);
++
++	return rc;
++}
++
++/**
++ * optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world
++ * @ctx:	calling context
++ * @shm:	shared memory holding the message to pass to secure world
++ *
++ * Does a FF-A call to OP-TEE in secure world and handles eventual resulting
++ * Remote Procedure Calls (RPC) from OP-TEE.
++ *
++ * Returns return code from FF-A, 0 is OK
++ */
++
++int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *shm)
++{
++	struct ffa_send_direct_data data = {
++		.data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG,
++		.data1 = (u32)shm->sec_world_id,
++		.data2 = (u32)(shm->sec_world_id >> 32),
++		.data3 = shm->offset,
++	};
++	struct optee_msg_arg *arg = tee_shm_get_va(shm, 0);
++	unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
++	struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
++
++	return optee_ffa_yielding_call(ctx, &data, rpc_arg);
++}
++
++int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm,
++			   struct page **pages, size_t num_pages,
++			   unsigned long start)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++	const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
++	struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
++	struct ffa_mem_region_attributes mem_attr = {
++		.receiver = ffa_dev->vm_id,
++		.attrs = FFA_MEM_RW,
++	};
++	struct ffa_mem_ops_args args = {
++		.use_txbuf = true,
++		.attrs = &mem_attr,
++		.nattrs = 1,
++	};
++	struct sg_table sgt;
++	int rc;
++
++	rc = check_mem_type(start, num_pages);
++	if (rc)
++		return rc;
++
++	rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0,
++				       num_pages * PAGE_SIZE, GFP_KERNEL);
++	if (rc)
++		return rc;
++	args.sg = sgt.sgl;
++	rc = ffa_ops->memory_share(ffa_dev, &args);
++	sg_free_table(&sgt);
++	if (rc)
++		return rc;
++
++	rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle);
++	if (rc) {
++		ffa_ops->memory_reclaim(args.g_handle, 0);
++		return rc;
++	}
++
++	shm->sec_world_id = args.g_handle;
++
++	return 0;
++}
++
++int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++	const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
++	struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
++	u64 global_handle = shm->sec_world_id;
++	struct ffa_send_direct_data data = {
++		.data0 = OPTEE_FFA_UNREGISTER_SHM,
++		.data1 = (u32)global_handle,
++		.data2 = (u32)(global_handle >> 32)
++	};
++	int rc;
++
++	optee_shm_rem_ffa_handle(optee, global_handle);
++	shm->sec_world_id = 0;
++
++	rc = ffa_ops->sync_send_receive(ffa_dev, &data);
++	if (rc)
++		pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc);
++
++	rc = ffa_ops->memory_reclaim(global_handle, 0);
++	if (rc)
++		pr_err("mem_reclain: 0x%llx %d", global_handle, rc);
++
++	return rc;
++}
++
++int optee_ffa_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++	const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
++	u64 global_handle = shm->sec_world_id;
++	int rc;
++
++	/*
++	 * We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call
++	 * since this is OP-TEE freeing via RPC so it has already retired
++	 * this ID.
++	 */
++
++	optee_shm_rem_ffa_handle(optee, global_handle);
++	rc = ffa_ops->memory_reclaim(global_handle, 0);
++	if (rc)
++		pr_err("mem_reclain: 0x%llx %d", global_handle, rc);
++
++	shm->sec_world_id = 0;
++
++	return rc;
++}
++#endif /*CONFIG_ARM_FFA_TRANSPORT*/
+diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
+index ab602bb8e14a..b9719c60dc48 100644
+--- a/drivers/tee/optee/core.c
++++ b/drivers/tee/optee/core.c
+@@ -6,6 +6,7 @@
+ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+ 
+ #include <linux/arm-smccc.h>
++#include <linux/arm_ffa.h>
+ #include <linux/errno.h>
+ #include <linux/io.h>
+ #include <linux/module.h>
+@@ -20,6 +21,7 @@
+ #include <linux/workqueue.h>
+ #include "optee_private.h"
+ #include "optee_smc.h"
++#include "optee_ffa.h"
+ #include "shm_pool.h"
+ 
+ #define DRIVER_NAME "optee"
+@@ -299,10 +301,9 @@ static int optee_open(struct tee_context *ctx)
+ 	mutex_init(&ctxdata->mutex);
+ 	INIT_LIST_HEAD(&ctxdata->sess_list);
+ 
+-	if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL)
+-		ctx->cap_memref_null  = true;
+-	else
+-		ctx->cap_memref_null = false;
++	ctx->cap_memref_null = optee_is_ffa_based(optee) ||
++			       (optee->sec_caps &
++				OPTEE_SMC_SEC_CAP_MEMREF_NULL);
+ 
+ 	ctx->data = ctxdata;
+ 	return 0;
+@@ -567,6 +568,472 @@ optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm)
+ 	return rc;
+ }
+ 
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++static void optee_ffa_get_version(struct tee_device *teedev,
++				  struct tee_ioctl_version_data *vers)
++{
++	struct tee_ioctl_version_data v = {
++		.impl_id = TEE_IMPL_ID_OPTEE,
++		.impl_caps = TEE_OPTEE_CAP_TZ,
++		.gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM |
++			    TEE_GEN_CAP_MEMREF_NULL,
++	};
++
++	*vers = v;
++}
++
++struct shm_rhash {
++	struct tee_shm *shm;
++	u64 global_id;
++	struct rhash_head linkage;
++};
++
++static void rh_free_fn(void *ptr, void *arg)
++{
++	kfree(ptr);
++}
++
++static const struct rhashtable_params shm_rhash_params = {
++	.head_offset = offsetof(struct shm_rhash, linkage),
++	.key_len     = sizeof(u64),
++	.key_offset  = offsetof(struct shm_rhash, global_id),
++	.automatic_shrinking = true,
++};
++
++struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id)
++{
++	struct tee_shm *shm = NULL;
++	struct shm_rhash *r;
++
++	mutex_lock(&optee->ffa.mutex);
++	r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
++				   shm_rhash_params);
++	if (r)
++		shm = r->shm;
++	mutex_unlock(&optee->ffa.mutex);
++
++	return shm;
++}
++
++int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm,
++			     u64 global_id)
++{
++	struct shm_rhash *r;
++	int rc;
++
++	r = kmalloc(sizeof(*r), GFP_KERNEL);
++	if (!r)
++		return -ENOMEM;
++	r->shm = shm;
++	r->global_id = global_id;
++
++	mutex_lock(&optee->ffa.mutex);
++	rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage,
++					   shm_rhash_params);
++	mutex_unlock(&optee->ffa.mutex);
++
++	if (rc)
++		kfree(r);
++
++	return rc;
++}
++
++int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id)
++{
++	struct shm_rhash *r;
++	int rc = -ENOENT;
++
++	mutex_lock(&optee->ffa.mutex);
++	r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
++				   shm_rhash_params);
++	if (r)
++		rc = rhashtable_remove_fast(&optee->ffa.global_ids,
++					    &r->linkage, shm_rhash_params);
++	mutex_unlock(&optee->ffa.mutex);
++
++	if (!rc)
++		kfree(r);
++
++	return rc;
++}
++
++static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p,
++				   u32 attr, const struct optee_msg_param *mp)
++{
++	struct tee_shm *shm = NULL;
++	u64 offs_high = 0;
++	u64 offs_low = 0;
++
++	p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
++		  attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT;
++	p->u.memref.size = mp->u.fmem.size;
++
++	if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID)
++		shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id);
++	p->u.memref.shm = shm;
++
++	if (shm) {
++		offs_low = mp->u.fmem.offs_low;
++		offs_high = mp->u.fmem.offs_high;
++	}
++	p->u.memref.shm_offs = offs_low | offs_high << 32;
++}
++
++/**
++ * optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to
++ *				struct tee_param
++ * @optee:	main service struct
++ * @params:	subsystem internal parameter representation
++ * @num_params:	number of elements in the parameter arrays
++ * @msg_params:	OPTEE_MSG parameters
++ *
++ * Returns 0 on success or <0 on failure
++ */
++static int optee_ffa_from_msg_param(struct optee *optee,
++				    struct tee_param *params, size_t num_params,
++				    const struct optee_msg_param *msg_params)
++{
++	size_t n;
++
++	for (n = 0; n < num_params; n++) {
++		struct tee_param *p = params + n;
++		const struct optee_msg_param *mp = msg_params + n;
++		u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
++
++		switch (attr) {
++		case OPTEE_MSG_ATTR_TYPE_NONE:
++			p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
++			memset(&p->u, 0, sizeof(p->u));
++			break;
++		case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
++		case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
++		case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
++			from_msg_param_value(p, attr, mp);
++			break;
++		case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT:
++		case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT:
++		case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT:
++			from_msg_param_ffa_mem(optee, p, attr, mp);
++			break;
++		default:
++			return -EINVAL;
++		}
++	}
++
++	return 0;
++}
++
++static int to_msg_param_ffa_mem(struct optee_msg_param *mp,
++				const struct tee_param *p)
++{
++	struct tee_shm *shm = p->u.memref.shm;
++
++	mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr -
++		   TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
++
++	if (shm) {
++		u64 shm_offs = p->u.memref.shm_offs;
++
++		mp->u.fmem.internal_offs = shm->offset;
++
++		mp->u.fmem.offs_low = shm_offs;
++		mp->u.fmem.offs_high = shm_offs >> 32;
++		/* Check that the entire offset could be stored. */
++		if (mp->u.fmem.offs_high != shm_offs >> 32)
++			return -EINVAL;
++
++		mp->u.fmem.global_id = shm->sec_world_id;
++	} else {
++		memset(&mp->u, 0, sizeof(mp->u));
++		mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID;
++	}
++	mp->u.fmem.size = p->u.memref.size;
++
++	return 0;
++}
++
++/**
++ * optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG
++ *			      parameters
++ * @optee:	main service struct
++ * @msg_params:	OPTEE_MSG parameters
++ * @num_params:	number of elements in the parameter arrays
++ * @params:	subsystem itnernal parameter representation
++ * Returns 0 on success or <0 on failure
++ */
++static int optee_ffa_to_msg_param(struct optee *optee,
++				  struct optee_msg_param *msg_params,
++				  size_t num_params,
++				  const struct tee_param *params)
++{
++	size_t n;
++
++	for (n = 0; n < num_params; n++) {
++		const struct tee_param *p = params + n;
++		struct optee_msg_param *mp = msg_params + n;
++
++		switch (p->attr) {
++		case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
++			mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
++			memset(&mp->u, 0, sizeof(mp->u));
++			break;
++		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
++		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
++		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
++			to_msg_param_value(mp, p);
++			break;
++		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
++		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
++		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
++			if (to_msg_param_ffa_mem(mp, p))
++				return -EINVAL;
++			break;
++		default:
++			return -EINVAL;
++		}
++	}
++
++	return 0;
++}
++
++static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev,
++					const struct ffa_dev_ops *ops)
++{
++	struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION };
++	int rc;
++
++	ops->mode_32bit_set(ffa_dev);
++
++	rc = ops->sync_send_receive(ffa_dev, &data);
++	if (rc) {
++		pr_err("Unexpected error %d\n", rc);
++		return false;
++	}
++	if (data.data0 != OPTEE_FFA_VERSION_MAJOR ||
++	    data.data1 < OPTEE_FFA_VERSION_MINOR) {
++		pr_err("Incompatible OP-TEE API version %lu.%lu",
++		       data.data0, data.data1);
++		return false;
++	}
++
++	data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION };
++	rc = ops->sync_send_receive(ffa_dev, &data);
++	if (rc) {
++		pr_err("Unexpected error %d\n", rc);
++		return false;
++	}
++	if (data.data2)
++		pr_info("revision %lu.%lu (%08lx)",
++			data.data0, data.data1, data.data2);
++	else
++		pr_info("revision %lu.%lu", data.data0, data.data1);
++
++	return true;
++}
++
++static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev,
++				    const struct ffa_dev_ops *ops,
++				    u32 *sec_caps, unsigned int *rpc_arg_count)
++{
++	struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES };
++	int rc;
++
++	rc = ops->sync_send_receive(ffa_dev, &data);
++	if (rc) {
++		pr_err("Unexpected error %d", rc);
++		return false;
++	}
++	if (data.data0) {
++		pr_err("Unexpected exchange error %lu", data.data0);
++		return false;
++	}
++
++	*sec_caps = 0;
++	*rpc_arg_count = (u8)data.data1;
++
++	return true;
++}
++
++static struct tee_shm_pool *optee_ffa_config_dyn_shm(void)
++{
++	struct tee_shm_pool_mgr *priv_mgr;
++	struct tee_shm_pool_mgr *dmabuf_mgr;
++	void *rc;
++
++	rc = optee_ffa_shm_pool_alloc_pages();
++	if (IS_ERR(rc))
++		return rc;
++	priv_mgr = rc;
++
++	rc = optee_ffa_shm_pool_alloc_pages();
++	if (IS_ERR(rc)) {
++		tee_shm_pool_mgr_destroy(priv_mgr);
++		return rc;
++	}
++	dmabuf_mgr = rc;
++
++	rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
++	if (IS_ERR(rc)) {
++		tee_shm_pool_mgr_destroy(priv_mgr);
++		tee_shm_pool_mgr_destroy(dmabuf_mgr);
++	}
++
++	return rc;
++}
++
++static const struct tee_driver_ops optee_ffa_clnt_ops = {
++	.get_version = optee_ffa_get_version,
++	.open = optee_open,
++	.release = optee_release,
++	.open_session = optee_open_session,
++	.close_session = optee_close_session,
++	.invoke_func = optee_invoke_func,
++	.cancel_req = optee_cancel_req,
++	.shm_register = optee_ffa_shm_register,
++	.shm_unregister = optee_ffa_shm_unregister,
++};
++
++static const struct tee_desc optee_ffa_clnt_desc = {
++	.name = DRIVER_NAME "ffa-clnt",
++	.ops = &optee_ffa_clnt_ops,
++	.owner = THIS_MODULE,
++};
++
++static const struct tee_driver_ops optee_ffa_supp_ops = {
++	.get_version = optee_ffa_get_version,
++	.open = optee_open,
++	.release = optee_release_supp,
++	.supp_recv = optee_supp_recv,
++	.supp_send = optee_supp_send,
++	.shm_register = optee_ffa_shm_register, /* same as for clnt ops */
++	.shm_unregister = optee_ffa_shm_unregister_supp,
++};
++
++static const struct tee_desc optee_ffa_supp_desc = {
++	.name = DRIVER_NAME "ffa-supp",
++	.ops = &optee_ffa_supp_ops,
++	.owner = THIS_MODULE,
++	.flags = TEE_DESC_PRIVILEGED,
++};
++
++static const struct optee_ops optee_ffa_ops = {
++	.do_call_with_arg = optee_ffa_do_call_with_arg,
++	.to_msg_param = optee_ffa_to_msg_param,
++	.from_msg_param = optee_ffa_from_msg_param,
++};
++
++static void optee_ffa_remove(struct ffa_device *ffa_dev)
++{
++	(void)ffa_dev;
++}
++
++static int optee_ffa_probe(struct ffa_device *ffa_dev)
++{
++	const struct ffa_dev_ops *ffa_ops;
++	unsigned int rpc_arg_count;
++	struct tee_device *teedev;
++	struct optee *optee;
++	u32 sec_caps;
++	int rc;
++
++	ffa_ops = ffa_dev_ops_get(ffa_dev);
++	if (!ffa_ops) {
++		pr_warn("failed \"method\" init: ffa\n");
++		return -ENOENT;
++	}
++
++	if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops))
++		return -EINVAL;
++
++	if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &sec_caps,
++				     &rpc_arg_count))
++		return -EINVAL;
++
++	optee = kzalloc(sizeof(*optee), GFP_KERNEL);
++	if (!optee) {
++		rc = -ENOMEM;
++		goto err;
++	}
++	optee->pool = optee_ffa_config_dyn_shm();
++	if (IS_ERR(optee->pool)) {
++		rc = PTR_ERR(optee->pool);
++		optee->pool = NULL;
++		goto err;
++	}
++
++	optee->ops = &optee_ffa_ops;
++	optee->ffa.ffa_dev = ffa_dev;
++	optee->ffa.ffa_ops = ffa_ops;
++	optee->sec_caps = sec_caps;
++	optee->rpc_arg_count = rpc_arg_count;
++
++	teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool,
++				  optee);
++	if (IS_ERR(teedev)) {
++		rc = PTR_ERR(teedev);
++		goto err;
++	}
++	optee->teedev = teedev;
++
++	teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool,
++				  optee);
++	if (IS_ERR(teedev)) {
++		rc = PTR_ERR(teedev);
++		goto err;
++	}
++	optee->supp_teedev = teedev;
++
++	rc = tee_device_register(optee->teedev);
++	if (rc)
++		goto err;
++
++	rc = tee_device_register(optee->supp_teedev);
++	if (rc)
++		goto err;
++
++	rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params);
++	if (rc)
++		goto err;
++	mutex_init(&optee->ffa.mutex);
++	mutex_init(&optee->call_queue.mutex);
++	INIT_LIST_HEAD(&optee->call_queue.waiters);
++	optee_wait_queue_init(&optee->wait_queue);
++	optee_supp_init(&optee->supp);
++	ffa_dev_set_drvdata(ffa_dev, optee);
++
++	pr_info("initialized driver\n");
++	return 0;
++err:
++	/*
++	 * tee_device_unregister() is safe to call even if the
++	 * devices hasn't been registered with
++	 * tee_device_register() yet.
++	 */
++	tee_device_unregister(optee->supp_teedev);
++	tee_device_unregister(optee->teedev);
++	if (optee->pool)
++		tee_shm_pool_free(optee->pool);
++	kfree(optee);
++	return rc;
++}
++
++static const struct ffa_device_id optee_ffa_device_id[] = {
++	/* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */
++	{ UUID_INIT(0x486178e0, 0xe7f8, 0x11e3,
++		    0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) },
++	{}
++};
++
++static struct ffa_driver optee_ffa_driver = {
++	.name = "optee",
++	.probe = optee_ffa_probe,
++	.remove = optee_ffa_remove,
++	.id_table = optee_ffa_device_id,
++};
++
++module_ffa_driver(optee_ffa_driver);
++#endif /*CONFIG_ARM_FFA_TRANSPORT*/
++
+ /* Simple wrapper functions to be able to use a function pointer */
+ static void optee_smccc_smc(unsigned long a0, unsigned long a1,
+ 			    unsigned long a2, unsigned long a3,
+@@ -615,7 +1082,8 @@ static int optee_remove(struct platform_device *pdev)
+ 	 * reference counters and also avoid wild pointers in secure world
+ 	 * into the old shared memory range.
+ 	 */
+-	optee_disable_shm_cache(optee);
++	if (!optee_is_ffa_based(optee))
++		optee_disable_shm_cache(optee);
+ 
+ 	/*
+ 	 * The two devices have to be unregistered before we can free the
+@@ -631,6 +1099,14 @@ static int optee_remove(struct platform_device *pdev)
+ 	optee_supp_uninit(&optee->supp);
+ 	mutex_destroy(&optee->call_queue.mutex);
+ 
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++	if (optee->ffa.ffa_ops) {
++		mutex_destroy(&optee->ffa.mutex);
++		rhashtable_free_and_destroy(&optee->ffa.global_ids,
++					    rh_free_fn, NULL);
++	}
++#endif /*CONFIG_ARM_FFA_TRANSPORT*/
++
+ 	kfree(optee);
+ 
+ 	return 0;
+diff --git a/drivers/tee/optee/optee_ffa.h b/drivers/tee/optee/optee_ffa.h
+new file mode 100644
+index 000000000000..ee3a03fc392c
+--- /dev/null
++++ b/drivers/tee/optee/optee_ffa.h
+@@ -0,0 +1,153 @@
++/* SPDX-License-Identifier: BSD-2-Clause */
++/*
++ * Copyright (c) 2019-2021, Linaro Limited
++ */
++
++/*
++ * This file is exported by OP-TEE and is kept in sync between secure world
++ * and normal world drivers. We're using ARM FF-A 1.0 specification.
++ */
++
++#ifndef __OPTEE_FFA_H
++#define __OPTEE_FFA_H
++
++#include <linux/arm_ffa.h>
++
++/*
++ * Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and
++ * responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal
++ * messages.
++ *
++ * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP
++ * are using the AArch32 SMC calling convention with register usage as
++ * defined in FF-A specification:
++ * w0:    Function ID (0x8400006F or 0x84000070)
++ * w1:    Source/Destination IDs
++ * w2:    Reserved (MBZ)
++ * w3-w7: Implementation defined, free to be used below
++ */
++
++#define OPTEE_FFA_VERSION_MAJOR	1
++#define OPTEE_FFA_VERSION_MINOR	0
++
++#define OPTEE_FFA_BLOCKING_CALL(id)	(id)
++#define OPTEE_FFA_YIELDING_CALL_BIT	31
++#define OPTEE_FFA_YIELDING_CALL(id)	((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT))
++
++/*
++ * Returns the API version implemented, currently follows the FF-A version.
++ * Call register usage:
++ * w3:    Service ID, OPTEE_FFA_GET_API_VERSION
++ * w4-w7: Not used (MBZ)
++ *
++ * Return register usage:
++ * w3:    OPTEE_FFA_VERSION_MAJOR
++ * w4:    OPTEE_FFA_VERSION_MINOR
++ * w5-w7: Not used (MBZ)
++ */
++#define OPTEE_FFA_GET_API_VERSION	OPTEE_FFA_BLOCKING_CALL(0)
++
++/*
++ * Returns the revision of OP-TEE.
++ *
++ * Used by non-secure world to figure out which version of the Trusted OS
++ * is installed. Note that the returned revision is the revision of the
++ * Trusted OS, not of the API.
++ *
++ * Call register usage:
++ * w3:    Service ID, OPTEE_FFA_GET_OS_VERSION
++ * w4-w7: Unused (MBZ)
++ *
++ * Return register usage:
++ * w3:    CFG_OPTEE_REVISION_MAJOR
++ * w4:    CFG_OPTEE_REVISION_MINOR
++ * w5:    TEE_IMPL_GIT_SHA1 (or zero if not supported)
++ */
++#define OPTEE_FFA_GET_OS_VERSION	OPTEE_FFA_BLOCKING_CALL(1)
++
++/*
++ * Exchange capabilities between normal world and secure world.
++ *
++ * Currently there are no defined capabilities. When features are added new
++ * capabilities may be added.
++ *
++ * Call register usage:
++ * w3:    Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES
++ * w4-w7: Note used (MBZ)
++ *
++ * Return register usage:
++ * w3:    Error code, 0 on success
++ * w4:    Bit[7:0]:  Number of parameters needed for RPC to be supplied
++ *                   as the second MSG arg struct for
++ *                   OPTEE_FFA_YIELDING_CALL_WITH_ARG.
++ *        Bit[31:8]: Reserved (MBZ)
++ * w5-w7: Note used (MBZ)
++ */
++#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2)
++
++/*
++ * Unregister shared memory
++ *
++ * Call register usage:
++ * w3:    Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM
++ * w4:    Shared memory handle, lower bits
++ * w5:    Shared memory handle, higher bits
++ * w6-w7: Not used (MBZ)
++ *
++ * Return register usage:
++ * w3:    Error code, 0 on success
++ * w4-w7: Note used (MBZ)
++ */
++#define OPTEE_FFA_UNREGISTER_SHM	OPTEE_FFA_BLOCKING_CALL(3)
++
++/*
++ * Call with struct optee_msg_arg as argument in the supplied shared memory
++ * with a zero internal offset and normal cached memory attributes.
++ * Register usage:
++ * w3:    Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG
++ * w4:    Lower 32 bits of a 64-bit Shared memory handle
++ * w5:    Upper 32 bits of a 64-bit Shared memory handle
++ * w6:    Offset into shared memory pointing to a struct optee_msg_arg
++ *	  right after the parameters of this struct (at offset
++ *	  OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg
++ *	  for RPC, this struct has reserved space for the number of RPC
++ *	  parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES.
++ * w7:    Not used (MBZ)
++ * Resume from RPC. Register usage:
++ * w3:    Service ID, OPTEE_FFA_YIELDING_CALL_RESUME
++ * w4-w6: Not used (MBZ)
++ * w7:    Resume info
++ *
++ * Normal return (yielding call is completed). Register usage:
++ * w3:    Error code, 0 on success
++ * w4:    OPTEE_FFA_YIELDING_CALL_RETURN_DONE
++ * w5-w7: Not used (MBZ)
++ *
++ * RPC interrupt return (RPC from secure world). Register usage:
++ * w3:    Error code == 0
++ * w4:    Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE
++ * w5-w6: Not used (MBZ)
++ * w7:    Resume info
++ *
++ * Possible error codes in register w3:
++ * 0:                       Success
++ * FFA_DENIED:              w4 isn't one of OPTEE_FFA_YIELDING_CALL_START
++ *                          OPTEE_FFA_YIELDING_CALL_RESUME
++ *
++ * Possible error codes for OPTEE_FFA_YIELDING_CALL_START,
++ * FFA_BUSY:               Number of OP-TEE OS threads exceeded,
++ *                         try again later
++ * FFA_DENIED:             RPC shared memory object not found
++ * FFA_INVALID_PARAMETER:  Bad shared memory handle or offset into the memory
++ *
++ * Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME
++ * FFA_INVALID_PARAMETER:  Bad resume info
++ */
++#define OPTEE_FFA_YIELDING_CALL_WITH_ARG	OPTEE_FFA_YIELDING_CALL(0)
++#define OPTEE_FFA_YIELDING_CALL_RESUME		OPTEE_FFA_YIELDING_CALL(1)
++
++#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE		0
++#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD		1
++#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT	2
++
++#endif /*__OPTEE_FFA_H*/
+diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h
+index 5bef6a0165db..1ee943980c68 100644
+--- a/drivers/tee/optee/optee_msg.h
++++ b/drivers/tee/optee/optee_msg.h
+@@ -28,6 +28,9 @@
+ #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT		0x5
+ #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT		0x6
+ #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT		0x7
++#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT		OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
++#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT		OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT
++#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT		OPTEE_MSG_ATTR_TYPE_RMEM_INOUT
+ #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT		0x9
+ #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT		0xa
+ #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT		0xb
+@@ -96,6 +99,8 @@
+  */
+ #define OPTEE_MSG_NONCONTIG_PAGE_SIZE		4096
+ 
++#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID	0xffffffffffffffff
++
+ /**
+  * struct optee_msg_param_tmem - temporary memory reference parameter
+  * @buf_ptr:	Address of the buffer
+@@ -127,6 +132,23 @@ struct optee_msg_param_rmem {
+ 	u64 shm_ref;
+ };
+ 
++/**
++ * struct optee_msg_param_fmem - ffa memory reference parameter
++ * @offs_lower:	   Lower bits of offset into shared memory reference
++ * @offs_upper:	   Upper bits of offset into shared memory reference
++ * @internal_offs: Internal offset into the first page of shared memory
++ *		   reference
++ * @size:	   Size of the buffer
++ * @global_id:	   Global identifier of Shared memory
++ */
++struct optee_msg_param_fmem {
++	u32 offs_low;
++	u16 offs_high;
++	u16 internal_offs;
++	u64 size;
++	u64 global_id;
++};
++
+ /**
+  * struct optee_msg_param_value - opaque value parameter
+  *
+@@ -143,13 +165,15 @@ struct optee_msg_param_value {
+  * @attr:	attributes
+  * @tmem:	parameter by temporary memory reference
+  * @rmem:	parameter by registered memory reference
++ * @fmem:	parameter by ffa registered memory reference
+  * @value:	parameter by opaque value
+  * @octets:	parameter by octet string
+  *
+  * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
+  * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets,
+  * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and
+- * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem,
++ * OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates
++ * @rmem or @fmem depending on the conduit.
+  * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
+  */
+ struct optee_msg_param {
+@@ -157,6 +181,7 @@ struct optee_msg_param {
+ 	union {
+ 		struct optee_msg_param_tmem tmem;
+ 		struct optee_msg_param_rmem rmem;
++		struct optee_msg_param_fmem fmem;
+ 		struct optee_msg_param_value value;
+ 		u8 octets[24];
+ 	} u;
+diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
+index c5741e96e967..1ffe74e66d15 100644
+--- a/drivers/tee/optee/optee_private.h
++++ b/drivers/tee/optee/optee_private.h
+@@ -7,6 +7,7 @@
+ #define OPTEE_PRIVATE_H
+ 
+ #include <linux/arm-smccc.h>
++#include <linux/rhashtable.h>
+ #include <linux/semaphore.h>
+ #include <linux/tee_drv.h>
+ #include <linux/types.h>
+@@ -20,6 +21,7 @@
+ #define TEEC_ERROR_NOT_SUPPORTED	0xFFFF000A
+ #define TEEC_ERROR_COMMUNICATION	0xFFFF000E
+ #define TEEC_ERROR_OUT_OF_MEMORY	0xFFFF000C
++#define TEEC_ERROR_BUSY			0xFFFF000D
+ #define TEEC_ERROR_SHORT_BUFFER		0xFFFF0010
+ 
+ #define TEEC_ORIGIN_COMMS		0x00000002
+@@ -66,6 +68,22 @@ struct optee_supp {
+ 	struct completion reqs_c;
+ };
+ 
++/**
++ * struct optee_ffa_data -  FFA communication struct
++ * @ffa_dev		FFA device, contains the destination id, the id of
++ *			OP-TEE in secure world
++ * @ffa_ops		FFA operations
++ * @mutex		Serializes access to @global_ids
++ * @global_ids		FF-A shared memory global handle translation
++ */
++struct optee_ffa {
++	struct ffa_device *ffa_dev;
++	const struct ffa_dev_ops *ffa_ops;
++	/* Serializes access to @global_ids */
++	struct mutex mutex;
++	struct rhashtable global_ids;
++};
++
+ struct optee;
+ 
+ /**
+@@ -113,11 +131,15 @@ struct optee {
+ 	struct tee_device *teedev;
+ 	const struct optee_ops *ops;
+ 	optee_invoke_fn *invoke_fn;
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++	struct optee_ffa ffa;
++#endif
+ 	struct optee_call_queue call_queue;
+ 	struct optee_wait_queue wait_queue;
+ 	struct optee_supp supp;
+ 	struct tee_shm_pool *pool;
+ 	void *memremaped_shm;
++	unsigned int rpc_arg_count;
+ 	u32 sec_caps;
+ 	bool   scan_bus_done;
+ 	struct workqueue_struct *scan_bus_wq;
+@@ -206,6 +228,36 @@ void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages,
+ #define PTA_CMD_GET_DEVICES_SUPP	0x1
+ int optee_enumerate_devices(u32 func);
+ 
++int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm,
++			     u64 global_id);
++int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id);
++
++struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id);
++
++int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm,
++			   struct page **pages, size_t num_pages,
++			   unsigned long start);
++int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm);
++int optee_ffa_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
++				struct page **pages, size_t num_pages,
++				unsigned long start);
++int optee_ffa_shm_unregister_supp(struct tee_context *ctx,
++				  struct tee_shm *shm);
++
++int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg);
++int optee_ffa_rpc_shm_register(struct tee_context *ctx, struct tee_shm *shm);
++void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd,
++			  struct optee_msg_arg *arg);
++
++static inline bool optee_is_ffa_based(struct optee *optee)
++{
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++	return optee->ffa.ffa_ops;
++#else
++	return false;
++#endif
++}
++
+ /*
+  * Small helpers
+  */
+diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
+index 39562fb6841e..865a9ab3cf65 100644
+--- a/drivers/tee/optee/rpc.c
++++ b/drivers/tee/optee/rpc.c
+@@ -10,6 +10,7 @@
+ #include <linux/i2c.h>
+ #include <linux/slab.h>
+ #include <linux/tee_drv.h>
++#include "optee_ffa.h"
+ #include "optee_private.h"
+ #include "optee_smc.h"
+ #include "optee_rpc_cmd.h"
+@@ -543,3 +544,120 @@ void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
+ 
+ 	param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
+ }
++
++#ifdef CONFIG_ARM_FFA_TRANSPORT
++static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
++					      struct optee_msg_arg *arg)
++{
++	struct tee_shm *shm;
++
++	if (arg->num_params != 1 ||
++	    arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
++		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
++		return;
++	}
++
++	switch (arg->params[0].u.value.a) {
++	case OPTEE_RPC_SHM_TYPE_APPL:
++		shm = cmd_alloc_suppl(ctx, arg->params[0].u.value.b);
++		break;
++	case OPTEE_RPC_SHM_TYPE_KERNEL:
++		shm = tee_shm_alloc(ctx, arg->params[0].u.value.b,
++				    TEE_SHM_MAPPED);
++		break;
++	default:
++		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
++		return;
++	}
++
++	if (IS_ERR(shm)) {
++		arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
++		return;
++	}
++
++	arg->params[0] = (struct optee_msg_param){
++		.attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT,
++		.u.fmem.size = tee_shm_get_size(shm),
++		.u.fmem.global_id = shm->sec_world_id,
++		.u.fmem.internal_offs = shm->offset,
++	};
++
++	arg->ret = TEEC_SUCCESS;
++}
++
++static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx,
++					     struct optee *optee,
++					     struct optee_msg_arg *arg)
++{
++	struct tee_shm *shm;
++
++	if (arg->num_params != 1 ||
++	    arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
++		goto err_bad_param;
++
++	shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b);
++	if (!shm)
++		goto err_bad_param;
++	switch (arg->params[0].u.value.a) {
++	case OPTEE_RPC_SHM_TYPE_APPL:
++		cmd_free_suppl(ctx, shm);
++		break;
++	case OPTEE_RPC_SHM_TYPE_KERNEL:
++		tee_shm_free(shm);
++		break;
++	default:
++		goto err_bad_param;
++	}
++	arg->ret = TEEC_SUCCESS;
++	return;
++
++err_bad_param:
++	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
++}
++
++static void handle_ffa_rpc_func_cmd(struct tee_context *ctx,
++				    struct optee_msg_arg *arg)
++{
++	struct optee *optee = tee_get_drvdata(ctx->teedev);
++
++	arg->ret_origin = TEEC_ORIGIN_COMMS;
++	switch (arg->cmd) {
++	case OPTEE_RPC_CMD_GET_TIME:
++		handle_rpc_func_cmd_get_time(arg);
++		break;
++	case OPTEE_RPC_CMD_WAIT_QUEUE:
++		handle_rpc_func_cmd_wq(optee, arg);
++		break;
++	case OPTEE_RPC_CMD_SUSPEND:
++		handle_rpc_func_cmd_wait(arg);
++		break;
++	case OPTEE_RPC_CMD_SHM_ALLOC:
++		handle_ffa_rpc_func_cmd_shm_alloc(ctx, arg);
++		break;
++	case OPTEE_RPC_CMD_SHM_FREE:
++		handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg);
++		break;
++	case OPTEE_RPC_CMD_I2C_TRANSFER:
++		handle_rpc_func_cmd_i2c_transfer(ctx, arg);
++		break;
++	default:
++		handle_rpc_supp_cmd(ctx, optee, arg);
++	}
++}
++
++void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd,
++			  struct optee_msg_arg *arg)
++{
++	switch (cmd) {
++	case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD:
++		handle_ffa_rpc_func_cmd(ctx, arg);
++		break;
++	case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT:
++		/* Interrupt delivered by now */
++		break;
++	default:
++		pr_warn("Unknown RPC func 0x%x\n", cmd);
++		break;
++	}
++}
++#endif /*CONFIG_ARM_FFA_TRANSPORT*/
+-- 
+2.17.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0015-coresight-etm4x-Save-restore-TRFCR_EL1.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0015-coresight-etm4x-Save-restore-TRFCR_EL1.patch
new file mode 100644
index 0000000..e67658f
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0015-coresight-etm4x-Save-restore-TRFCR_EL1.patch
@@ -0,0 +1,181 @@
+From 7150eac72ee0c2c7da03f53a90a871c3d6d4e538 Mon Sep 17 00:00:00 2001
+From: Suzuki K Poulose <suzuki.poulose@arm.com>
+Date: Tue, 14 Sep 2021 11:26:32 +0100
+Subject: [PATCH 1/2] coresight: etm4x: Save restore TRFCR_EL1
+
+When the CPU enters a low power mode, the TRFCR_EL1 contents could be
+reset. Thus we need to save/restore the TRFCR_EL1 along with the ETM4x
+registers to allow the tracing.
+
+The TRFCR related helpers are in a new header file, as we need to use
+them for TRBE in the later patches.
+
+Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
+Cc: Anshuman Khandual <anshuman.khandual@arm.com>
+Cc: Mike Leach <mike.leach@linaro.org>
+Cc: Leo Yan <leo.yan@linaro.org>
+Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
+Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
+Link: https://lore.kernel.org/r/20210914102641.1852544-2-suzuki.poulose@arm.com
+[Fixed cosmetic details]
+Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=937d3f58cacf377cab7c32e475e1ffa91d611dce]
+Signed-off-by: Davidson K <davidson.kumaresan@arm.com>
+---
+ .../coresight/coresight-etm4x-core.c          | 43 +++++++++++++------
+ drivers/hwtracing/coresight/coresight-etm4x.h |  2 +
+ .../coresight/coresight-self-hosted-trace.h   | 24 +++++++++++
+ 3 files changed, 57 insertions(+), 12 deletions(-)
+ create mode 100644 drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+
+diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+index 90827077d2f9..b78080d169f8 100644
+--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
++++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+@@ -39,6 +39,7 @@
+ 
+ #include "coresight-etm4x.h"
+ #include "coresight-etm-perf.h"
++#include "coresight-self-hosted-trace.h"
+ 
+ static int boot_enable;
+ module_param(boot_enable, int, 0444);
+@@ -990,7 +991,7 @@ static void cpu_enable_tracing(struct etmv4_drvdata *drvdata)
+ 	if (is_kernel_in_hyp_mode())
+ 		trfcr |= TRFCR_EL2_CX;
+ 
+-	write_sysreg_s(trfcr, SYS_TRFCR_EL1);
++	write_trfcr(trfcr);
+ }
+ 
+ static void etm4_init_arch_data(void *info)
+@@ -1528,7 +1529,7 @@ static void etm4_init_trace_id(struct etmv4_drvdata *drvdata)
+ 	drvdata->trcid = coresight_get_trace_id(drvdata->cpu);
+ }
+ 
+-static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
++static int __etm4_cpu_save(struct etmv4_drvdata *drvdata)
+ {
+ 	int i, ret = 0;
+ 	struct etmv4_save_state *state;
+@@ -1667,7 +1668,23 @@ static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
+ 	return ret;
+ }
+ 
+-static void etm4_cpu_restore(struct etmv4_drvdata *drvdata)
++static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
++{
++	int ret = 0;
++
++	/* Save the TRFCR irrespective of whether the ETM is ON */
++	if (drvdata->trfc)
++		drvdata->save_trfcr = read_trfcr();
++	/*
++	 * Save and restore the ETM Trace registers only if
++	 * the ETM is active.
++	 */
++	if (local_read(&drvdata->mode) && drvdata->save_state)
++		ret = __etm4_cpu_save(drvdata);
++	return ret;
++}
++
++static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata)
+ {
+ 	int i;
+ 	struct etmv4_save_state *state = drvdata->save_state;
+@@ -1763,6 +1780,14 @@ static void etm4_cpu_restore(struct etmv4_drvdata *drvdata)
+ 	etm4_cs_lock(drvdata, csa);
+ }
+ 
++static void etm4_cpu_restore(struct etmv4_drvdata *drvdata)
++{
++	if (drvdata->trfc)
++		write_trfcr(drvdata->save_trfcr);
++	if (drvdata->state_needs_restore)
++		__etm4_cpu_restore(drvdata);
++}
++
+ static int etm4_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
+ 			      void *v)
+ {
+@@ -1774,23 +1799,17 @@ static int etm4_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
+ 
+ 	drvdata = etmdrvdata[cpu];
+ 
+-	if (!drvdata->save_state)
+-		return NOTIFY_OK;
+-
+ 	if (WARN_ON_ONCE(drvdata->cpu != cpu))
+ 		return NOTIFY_BAD;
+ 
+ 	switch (cmd) {
+ 	case CPU_PM_ENTER:
+-		/* save the state if self-hosted coresight is in use */
+-		if (local_read(&drvdata->mode))
+-			if (etm4_cpu_save(drvdata))
+-				return NOTIFY_BAD;
++		if (etm4_cpu_save(drvdata))
++			return NOTIFY_BAD;
+ 		break;
+ 	case CPU_PM_EXIT:
+ 	case CPU_PM_ENTER_FAILED:
+-		if (drvdata->state_needs_restore)
+-			etm4_cpu_restore(drvdata);
++		etm4_cpu_restore(drvdata);
+ 		break;
+ 	default:
+ 		return NOTIFY_DONE;
+diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
+index e5b79bdb9851..82cba16b73a6 100644
+--- a/drivers/hwtracing/coresight/coresight-etm4x.h
++++ b/drivers/hwtracing/coresight/coresight-etm4x.h
+@@ -921,6 +921,7 @@ struct etmv4_save_state {
+  * @lpoverride:	If the implementation can support low-power state over.
+  * @trfc:	If the implementation supports Arm v8.4 trace filter controls.
+  * @config:	structure holding configuration parameters.
++ * @save_trfcr:	Saved TRFCR_EL1 register during a CPU PM event.
+  * @save_state:	State to be preserved across power loss
+  * @state_needs_restore: True when there is context to restore after PM exit
+  * @skip_power_up: Indicates if an implementation can skip powering up
+@@ -973,6 +974,7 @@ struct etmv4_drvdata {
+ 	bool				lpoverride;
+ 	bool				trfc;
+ 	struct etmv4_config		config;
++	u64				save_trfcr;
+ 	struct etmv4_save_state		*save_state;
+ 	bool				state_needs_restore;
+ 	bool				skip_power_up;
+diff --git a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+new file mode 100644
+index 000000000000..303d71911870
+--- /dev/null
++++ b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+@@ -0,0 +1,24 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Arm v8 Self-Hosted trace support.
++ *
++ * Copyright (C) 2021 ARM Ltd.
++ */
++
++#ifndef __CORESIGHT_SELF_HOSTED_TRACE_H
++#define __CORESIGHT_SELF_HOSTED_TRACE_H
++
++#include <asm/sysreg.h>
++
++static inline u64 read_trfcr(void)
++{
++	return read_sysreg_s(SYS_TRFCR_EL1);
++}
++
++static inline void write_trfcr(u64 val)
++{
++	write_sysreg_s(val, SYS_TRFCR_EL1);
++	isb();
++}
++
++#endif /*  __CORESIGHT_SELF_HOSTED_TRACE_H */
+-- 
+2.34.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0016-coresight-etm4x-Use-Trace-Filtering-controls-dynamic.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0016-coresight-etm4x-Use-Trace-Filtering-controls-dynamic.patch
new file mode 100644
index 0000000..4d5a719
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0016-coresight-etm4x-Use-Trace-Filtering-controls-dynamic.patch
@@ -0,0 +1,227 @@
+From 55228b0522bfb7d945019a8931742ab9b063b6c9 Mon Sep 17 00:00:00 2001
+From: Suzuki K Poulose <suzuki.poulose@arm.com>
+Date: Tue, 14 Sep 2021 11:26:33 +0100
+Subject: [PATCH 2/2] coresight: etm4x: Use Trace Filtering controls
+ dynamically
+
+The Trace Filtering support (FEAT_TRF) ensures that the ETM
+can be prohibited from generating any trace for a given EL.
+This is much stricter knob, than the TRCVICTLR exception level
+masks, which doesn't prevent the ETM from generating Context
+packets for an "excluded" EL. At the moment, we do a onetime
+enable trace at user and kernel and leave it untouched for the
+kernel life time. This implies that the ETM could potentially
+generate trace packets containing the kernel addresses, and
+thus leaking the kernel virtual address in the trace.
+
+This patch makes the switch dynamic, by honoring the filters
+set by the user and enforcing them in the TRFCR controls.
+We also rename the cpu_enable_tracing() appropriately to
+cpu_detect_trace_filtering() and the drvdata member
+trfc => trfcr to indicate the "value" of the TRFCR_EL1.
+
+Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
+Cc: Al Grant <al.grant@arm.com>
+Cc: Mike Leach <mike.leach@linaro.org>
+Cc: Leo Yan <leo.yan@linaro.org>
+Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
+Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
+Link: https://lore.kernel.org/r/20210914102641.1852544-3-suzuki.poulose@arm.com
+Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f6fd1aa8cc147b111af1a833574487a87237dc0]
+Signed-off-by: Davidson K <davidson.kumaresan@arm.com>
+---
+ .../coresight/coresight-etm4x-core.c          | 63 ++++++++++++++-----
+ drivers/hwtracing/coresight/coresight-etm4x.h |  7 ++-
+ .../coresight/coresight-self-hosted-trace.h   |  7 +++
+ 3 files changed, 59 insertions(+), 18 deletions(-)
+
+diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+index b78080d169f8..b804d4413b43 100644
+--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
++++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+@@ -237,6 +237,45 @@ struct etm4_enable_arg {
+ 	int rc;
+ };
+ 
++/*
++ * etm4x_prohibit_trace - Prohibit the CPU from tracing at all ELs.
++ * When the CPU supports FEAT_TRF, we could move the ETM to a trace
++ * prohibited state by filtering the Exception levels via TRFCR_EL1.
++ */
++static void etm4x_prohibit_trace(struct etmv4_drvdata *drvdata)
++{
++	/* If the CPU doesn't support FEAT_TRF, nothing to do */
++	if (!drvdata->trfcr)
++		return;
++	cpu_prohibit_trace();
++}
++
++/*
++ * etm4x_allow_trace - Allow CPU tracing in the respective ELs,
++ * as configured by the drvdata->config.mode for the current
++ * session. Even though we have TRCVICTLR bits to filter the
++ * trace in the ELs, it doesn't prevent the ETM from generating
++ * a packet (e.g, TraceInfo) that might contain the addresses from
++ * the excluded levels. Thus we use the additional controls provided
++ * via the Trace Filtering controls (FEAT_TRF) to make sure no trace
++ * is generated for the excluded ELs.
++ */
++static void etm4x_allow_trace(struct etmv4_drvdata *drvdata)
++{
++	u64 trfcr = drvdata->trfcr;
++
++	/* If the CPU doesn't support FEAT_TRF, nothing to do */
++	if (!trfcr)
++		return;
++
++	if (drvdata->config.mode & ETM_MODE_EXCL_KERN)
++		trfcr &= ~TRFCR_ELx_ExTRE;
++	if (drvdata->config.mode & ETM_MODE_EXCL_USER)
++		trfcr &= ~TRFCR_ELx_E0TRE;
++
++	write_trfcr(trfcr);
++}
++
+ #ifdef CONFIG_ETM4X_IMPDEF_FEATURE
+ 
+ #define HISI_HIP08_AMBA_ID		0x000b6d01
+@@ -441,6 +480,7 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
+ 	if (etm4x_is_ete(drvdata))
+ 		etm4x_relaxed_write32(csa, TRCRSR_TA, TRCRSR);
+ 
++	etm4x_allow_trace(drvdata);
+ 	/* Enable the trace unit */
+ 	etm4x_relaxed_write32(csa, 1, TRCPRGCTLR);
+ 
+@@ -724,7 +764,6 @@ static int etm4_enable(struct coresight_device *csdev,
+ static void etm4_disable_hw(void *info)
+ {
+ 	u32 control;
+-	u64 trfcr;
+ 	struct etmv4_drvdata *drvdata = info;
+ 	struct etmv4_config *config = &drvdata->config;
+ 	struct coresight_device *csdev = drvdata->csdev;
+@@ -751,12 +790,7 @@ static void etm4_disable_hw(void *info)
+ 	 * If the CPU supports v8.4 Trace filter Control,
+ 	 * set the ETM to trace prohibited region.
+ 	 */
+-	if (drvdata->trfc) {
+-		trfcr = read_sysreg_s(SYS_TRFCR_EL1);
+-		write_sysreg_s(trfcr & ~(TRFCR_ELx_ExTRE | TRFCR_ELx_E0TRE),
+-			       SYS_TRFCR_EL1);
+-		isb();
+-	}
++	etm4x_prohibit_trace(drvdata);
+ 	/*
+ 	 * Make sure everything completes before disabling, as recommended
+ 	 * by section 7.3.77 ("TRCVICTLR, ViewInst Main Control Register,
+@@ -772,9 +806,6 @@ static void etm4_disable_hw(void *info)
+ 	if (coresight_timeout(csa, TRCSTATR, TRCSTATR_PMSTABLE_BIT, 1))
+ 		dev_err(etm_dev,
+ 			"timeout while waiting for PM stable Trace Status\n");
+-	if (drvdata->trfc)
+-		write_sysreg_s(trfcr, SYS_TRFCR_EL1);
+-
+ 	/* read the status of the single shot comparators */
+ 	for (i = 0; i < drvdata->nr_ss_cmp; i++) {
+ 		config->ss_status[i] =
+@@ -969,15 +1000,15 @@ static bool etm4_init_csdev_access(struct etmv4_drvdata *drvdata,
+ 	return false;
+ }
+ 
+-static void cpu_enable_tracing(struct etmv4_drvdata *drvdata)
++static void cpu_detect_trace_filtering(struct etmv4_drvdata *drvdata)
+ {
+ 	u64 dfr0 = read_sysreg(id_aa64dfr0_el1);
+ 	u64 trfcr;
+ 
++	drvdata->trfcr = 0;
+ 	if (!cpuid_feature_extract_unsigned_field(dfr0, ID_AA64DFR0_TRACE_FILT_SHIFT))
+ 		return;
+ 
+-	drvdata->trfc = true;
+ 	/*
+ 	 * If the CPU supports v8.4 SelfHosted Tracing, enable
+ 	 * tracing at the kernel EL and EL0, forcing to use the
+@@ -991,7 +1022,7 @@ static void cpu_enable_tracing(struct etmv4_drvdata *drvdata)
+ 	if (is_kernel_in_hyp_mode())
+ 		trfcr |= TRFCR_EL2_CX;
+ 
+-	write_trfcr(trfcr);
++	drvdata->trfcr = trfcr;
+ }
+ 
+ static void etm4_init_arch_data(void *info)
+@@ -1177,7 +1208,7 @@ static void etm4_init_arch_data(void *info)
+ 	/* NUMCNTR, bits[30:28] number of counters available for tracing */
+ 	drvdata->nr_cntr = BMVAL(etmidr5, 28, 30);
+ 	etm4_cs_lock(drvdata, csa);
+-	cpu_enable_tracing(drvdata);
++	cpu_detect_trace_filtering(drvdata);
+ }
+ 
+ static inline u32 etm4_get_victlr_access_type(struct etmv4_config *config)
+@@ -1673,7 +1704,7 @@ static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
+ 	int ret = 0;
+ 
+ 	/* Save the TRFCR irrespective of whether the ETM is ON */
+-	if (drvdata->trfc)
++	if (drvdata->trfcr)
+ 		drvdata->save_trfcr = read_trfcr();
+ 	/*
+ 	 * Save and restore the ETM Trace registers only if
+@@ -1782,7 +1813,7 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata)
+ 
+ static void etm4_cpu_restore(struct etmv4_drvdata *drvdata)
+ {
+-	if (drvdata->trfc)
++	if (drvdata->trfcr)
+ 		write_trfcr(drvdata->save_trfcr);
+ 	if (drvdata->state_needs_restore)
+ 		__etm4_cpu_restore(drvdata);
+diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
+index 82cba16b73a6..3c4d69b096ca 100644
+--- a/drivers/hwtracing/coresight/coresight-etm4x.h
++++ b/drivers/hwtracing/coresight/coresight-etm4x.h
+@@ -919,7 +919,10 @@ struct etmv4_save_state {
+  * @nooverflow:	Indicate if overflow prevention is supported.
+  * @atbtrig:	If the implementation can support ATB triggers
+  * @lpoverride:	If the implementation can support low-power state over.
+- * @trfc:	If the implementation supports Arm v8.4 trace filter controls.
++ * @trfcr:	If the CPU supports FEAT_TRF, value of the TRFCR_ELx that
++ *		allows tracing at all ELs. We don't want to compute this
++ *		at runtime, due to the additional setting of TRFCR_CX when
++ *		in EL2. Otherwise, 0.
+  * @config:	structure holding configuration parameters.
+  * @save_trfcr:	Saved TRFCR_EL1 register during a CPU PM event.
+  * @save_state:	State to be preserved across power loss
+@@ -972,7 +975,7 @@ struct etmv4_drvdata {
+ 	bool				nooverflow;
+ 	bool				atbtrig;
+ 	bool				lpoverride;
+-	bool				trfc;
++	u64				trfcr;
+ 	struct etmv4_config		config;
+ 	u64				save_trfcr;
+ 	struct etmv4_save_state		*save_state;
+diff --git a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+index 303d71911870..23f05df3f173 100644
+--- a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
++++ b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+@@ -21,4 +21,11 @@ static inline void write_trfcr(u64 val)
+ 	isb();
+ }
+ 
++static inline void cpu_prohibit_trace(void)
++{
++	u64 trfcr = read_trfcr();
++
++	/* Prohibit tracing at EL0 & the kernel EL */
++	write_trfcr(trfcr & ~(TRFCR_ELx_ExTRE | TRFCR_ELx_E0TRE));
++}
+ #endif /*  __CORESIGHT_SELF_HOSTED_TRACE_H */
+-- 
+2.34.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0017-perf-arm-cmn-Use-irq_set_affinity.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0017-perf-arm-cmn-Use-irq_set_affinity.patch
new file mode 100644
index 0000000..e8674c3
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0017-perf-arm-cmn-Use-irq_set_affinity.patch
@@ -0,0 +1,74 @@
+From ad3c5d9224ffcd7b2e083f03441c6188d2bbef67 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Tue, 18 May 2021 11:17:28 +0200
+Subject: [PATCH 01/14] perf/arm-cmn: Use irq_set_affinity()
+
+The driver uses irq_set_affinity_hint() to set the affinity for the PMU
+interrupts, which relies on the undocumented side effect that this function
+actually sets the affinity under the hood.
+
+Setting an hint is clearly not a guarantee and for these PMU interrupts an
+affinity hint, which is supposed to guide userspace for setting affinity,
+is beyond pointless, because the affinity of these interrupts cannot be
+modified from user space.
+
+Aside of that the error checks are bogus because the only error which is
+returned from irq_set_affinity_hint() is when there is no irq descriptor
+for the interrupt number, but not when the affinity set fails. That's on
+purpose because the hint can point to an offline CPU.
+
+Replace the mindless abuse with irq_set_affinity().
+
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+
+Link: https://lore.kernel.org/r/20210518093118.277228577@linutronix.de
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/20210518093118.277228577@linutronix.de]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 9 ++-------
+ 1 file changed, 2 insertions(+), 7 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 46defb1dcf86..38fa6f89d0bc 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -1162,7 +1162,7 @@ static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
+ 
+ 	perf_pmu_migrate_context(&cmn->pmu, cpu, target);
+ 	for (i = 0; i < cmn->num_dtcs; i++)
+-		irq_set_affinity_hint(cmn->dtc[i].irq, cpumask_of(target));
++		irq_set_affinity(cmn->dtc[i].irq, cpumask_of(target));
+ 	cmn->cpu = target;
+ 	return 0;
+ }
+@@ -1222,7 +1222,7 @@ static int arm_cmn_init_irqs(struct arm_cmn *cmn)
+ 		if (err)
+ 			return err;
+ 
+-		err = irq_set_affinity_hint(irq, cpumask_of(cmn->cpu));
++		err = irq_set_affinity(irq, cpumask_of(cmn->cpu));
+ 		if (err)
+ 			return err;
+ 	next:
+@@ -1568,16 +1568,11 @@ static int arm_cmn_probe(struct platform_device *pdev)
+ static int arm_cmn_remove(struct platform_device *pdev)
+ {
+ 	struct arm_cmn *cmn = platform_get_drvdata(pdev);
+-	int i;
+ 
+ 	writel_relaxed(0, cmn->dtc[0].base + CMN_DT_DTC_CTL);
+ 
+ 	perf_pmu_unregister(&cmn->pmu);
+ 	cpuhp_state_remove_instance(arm_cmn_hp_state, &cmn->cpuhp_node);
+-
+-	for (i = 0; i < cmn->num_dtcs; i++)
+-		irq_set_affinity_hint(cmn->dtc[i].irq, NULL);
+-
+ 	return 0;
+ }
+ 
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0018-perf-arm-cmn-Fix-CPU-hotplug-unregistration.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0018-perf-arm-cmn-Fix-CPU-hotplug-unregistration.patch
new file mode 100644
index 0000000..e06fb88
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0018-perf-arm-cmn-Fix-CPU-hotplug-unregistration.patch
@@ -0,0 +1,46 @@
+From 249304c3517a38863c8e45e63d509d01bd67dead Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:50 +0000
+Subject: [PATCH 02/14] perf/arm-cmn: Fix CPU hotplug unregistration
+
+Attempting to migrate the PMU context after we've unregistered the PMU
+device, or especially if we never successfully registered it in the
+first place, is a woefully bad idea. It's also fundamentally pointless
+anyway. Make sure to unregister an instance from the hotplug handler
+*without* invoking the teardown callback.
+
+Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver")
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/2c221d745544774e4b07583b65b5d4d94f7e0fe4.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 38fa6f89d0bc..fe7f3e945481 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -1561,7 +1561,8 @@ static int arm_cmn_probe(struct platform_device *pdev)
+ 
+ 	err = perf_pmu_register(&cmn->pmu, name, -1);
+ 	if (err)
+-		cpuhp_state_remove_instance(arm_cmn_hp_state, &cmn->cpuhp_node);
++		cpuhp_state_remove_instance_nocalls(arm_cmn_hp_state, &cmn->cpuhp_node);
++
+ 	return err;
+ }
+ 
+@@ -1572,7 +1573,7 @@ static int arm_cmn_remove(struct platform_device *pdev)
+ 	writel_relaxed(0, cmn->dtc[0].base + CMN_DT_DTC_CTL);
+ 
+ 	perf_pmu_unregister(&cmn->pmu);
+-	cpuhp_state_remove_instance(arm_cmn_hp_state, &cmn->cpuhp_node);
++	cpuhp_state_remove_instance_nocalls(arm_cmn_hp_state, &cmn->cpuhp_node);
+ 	return 0;
+ }
+ 
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0019-perf-arm-cmn-Account-for-NUMA-affinity.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0019-perf-arm-cmn-Account-for-NUMA-affinity.patch
new file mode 100644
index 0000000..f93bff7
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0019-perf-arm-cmn-Account-for-NUMA-affinity.patch
@@ -0,0 +1,107 @@
+From c4b023618252ad8c03b7ae2cc411718af285bf66 Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:51 +0000
+Subject: [PATCH 03/14] perf/arm-cmn: Account for NUMA affinity
+
+On a system with multiple CMN meshes, ideally we'd want to access each
+PMU from within its own mesh, rather than with a long CML round-trip,
+wherever feasible. Since such a system is likely to be presented as
+multiple NUMA nodes, let's also hope a proximity domain is specified
+for each CMN programming interface, and use that to guide our choice
+of IRQ affinity to favour a node-local CPU where possible.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/32438b0d016e0649d882d47d30ac2000484287b9.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/32438b0d016e0649d882d47d30ac2000484287b9.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 51 +++++++++++++++++++++++++++++++-----------
+ 1 file changed, 38 insertions(+), 13 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index fe7f3e945481..2146d1c0103f 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -1147,23 +1147,47 @@ static int arm_cmn_commit_txn(struct pmu *pmu)
+ 	return 0;
+ }
+ 
+-static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
++static void arm_cmn_migrate(struct arm_cmn *cmn, unsigned int cpu)
++{
++	unsigned int i;
++
++	perf_pmu_migrate_context(&cmn->pmu, cmn->cpu, cpu);
++	for (i = 0; i < cmn->num_dtcs; i++)
++		irq_set_affinity(cmn->dtc[i].irq, cpumask_of(cpu));
++	cmn->cpu = cpu;
++}
++
++static int arm_cmn_pmu_online_cpu(unsigned int cpu, struct hlist_node *cpuhp_node)
+ {
+ 	struct arm_cmn *cmn;
+-	unsigned int i, target;
++	int node;
+ 
+-	cmn = hlist_entry_safe(node, struct arm_cmn, cpuhp_node);
+-	if (cpu != cmn->cpu)
+-		return 0;
++	cmn = hlist_entry_safe(cpuhp_node, struct arm_cmn, cpuhp_node);
++	node = dev_to_node(cmn->dev);
++	if (node != NUMA_NO_NODE && cpu_to_node(cmn->cpu) != node && cpu_to_node(cpu) == node)
++		arm_cmn_migrate(cmn, cpu);
++	return 0;
++}
++
++static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *cpuhp_node)
++{
++	struct arm_cmn *cmn;
++	unsigned int target;
++	int node;
++	cpumask_t mask;
+ 
+-	target = cpumask_any_but(cpu_online_mask, cpu);
+-	if (target >= nr_cpu_ids)
++	cmn = hlist_entry_safe(cpuhp_node, struct arm_cmn, cpuhp_node);
++	if (cpu != cmn->cpu)
+ 		return 0;
+ 
+-	perf_pmu_migrate_context(&cmn->pmu, cpu, target);
+-	for (i = 0; i < cmn->num_dtcs; i++)
+-		irq_set_affinity(cmn->dtc[i].irq, cpumask_of(target));
+-	cmn->cpu = target;
++	node = dev_to_node(cmn->dev);
++	if (cpumask_and(&mask, cpumask_of_node(node), cpu_online_mask) &&
++	    cpumask_andnot(&mask, &mask, cpumask_of(cpu)))
++		target = cpumask_any(&mask);
++	else
++		target = cpumask_any_but(cpu_online_mask, cpu);
++	if (target < nr_cpu_ids)
++		arm_cmn_migrate(cmn, target);
+ 	return 0;
+ }
+ 
+@@ -1532,7 +1556,7 @@ static int arm_cmn_probe(struct platform_device *pdev)
+ 	if (err)
+ 		return err;
+ 
+-	cmn->cpu = raw_smp_processor_id();
++	cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev));
+ 	cmn->pmu = (struct pmu) {
+ 		.module = THIS_MODULE,
+ 		.attr_groups = arm_cmn_attr_groups,
+@@ -1608,7 +1632,8 @@ static int __init arm_cmn_init(void)
+ 	int ret;
+ 
+ 	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+-				      "perf/arm/cmn:online", NULL,
++				      "perf/arm/cmn:online",
++				      arm_cmn_pmu_online_cpu,
+ 				      arm_cmn_pmu_offline_cpu);
+ 	if (ret < 0)
+ 		return ret;
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0020-perf-arm-cmn-Drop-compile-test-restriction.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0020-perf-arm-cmn-Drop-compile-test-restriction.patch
new file mode 100644
index 0000000..1a3e2d9
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0020-perf-arm-cmn-Drop-compile-test-restriction.patch
@@ -0,0 +1,89 @@
+From c3b11ad7a7e3e154a17f36c6768deab9227e28de Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:52 +0000
+Subject: [PATCH 04/14] perf/arm-cmn: Drop compile-test restriction
+
+Although CMN is currently (and overwhelmingly likely to remain) deployed
+in arm64-only (modulo userspace) systems, the 64-bit "dependency" for
+compile-testing was just laziness due to heavy reliance on readq/writeq
+accessors. Since we only need one extra include for robustness in that
+regard, let's pull that in, widen the compile-test coverage, and fix up
+the smattering of type laziness that that brings to light.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/baee9ee0d0bdad8aaeb70f5a4b98d8fd4b1f5786.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/baee9ee0d0bdad8aaeb70f5a4b98d8fd4b1f5786.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/Kconfig   |  2 +-
+ drivers/perf/arm-cmn.c | 25 +++++++++++++------------
+ 2 files changed, 14 insertions(+), 13 deletions(-)
+
+diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
+index 130327ff0b0e..828a042d6a07 100644
+--- a/drivers/perf/Kconfig
++++ b/drivers/perf/Kconfig
+@@ -43,7 +43,7 @@ config ARM_CCN
+ 
+ config ARM_CMN
+ 	tristate "Arm CMN-600 PMU support"
+-	depends on ARM64 || (COMPILE_TEST && 64BIT)
++	depends on ARM64 || COMPILE_TEST
+ 	help
+ 	  Support for PMU events monitoring on the Arm CMN-600 Coherent Mesh
+ 	  Network interconnect.
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 2146d1c0103f..e9af79b5f3de 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -7,6 +7,7 @@
+ #include <linux/bitops.h>
+ #include <linux/interrupt.h>
+ #include <linux/io.h>
++#include <linux/io-64-nonatomic-lo-hi.h>
+ #include <linux/kernel.h>
+ #include <linux/list.h>
+ #include <linux/module.h>
+@@ -122,11 +123,11 @@
+ 
+ 
+ /* Event attributes */
+-#define CMN_CONFIG_TYPE			GENMASK(15, 0)
+-#define CMN_CONFIG_EVENTID		GENMASK(23, 16)
+-#define CMN_CONFIG_OCCUPID		GENMASK(27, 24)
+-#define CMN_CONFIG_BYNODEID		BIT(31)
+-#define CMN_CONFIG_NODEID		GENMASK(47, 32)
++#define CMN_CONFIG_TYPE			GENMASK_ULL(15, 0)
++#define CMN_CONFIG_EVENTID		GENMASK_ULL(23, 16)
++#define CMN_CONFIG_OCCUPID		GENMASK_ULL(27, 24)
++#define CMN_CONFIG_BYNODEID		BIT_ULL(31)
++#define CMN_CONFIG_NODEID		GENMASK_ULL(47, 32)
+ 
+ #define CMN_EVENT_TYPE(event)		FIELD_GET(CMN_CONFIG_TYPE, (event)->attr.config)
+ #define CMN_EVENT_EVENTID(event)	FIELD_GET(CMN_CONFIG_EVENTID, (event)->attr.config)
+@@ -134,13 +135,13 @@
+ #define CMN_EVENT_BYNODEID(event)	FIELD_GET(CMN_CONFIG_BYNODEID, (event)->attr.config)
+ #define CMN_EVENT_NODEID(event)		FIELD_GET(CMN_CONFIG_NODEID, (event)->attr.config)
+ 
+-#define CMN_CONFIG_WP_COMBINE		GENMASK(27, 24)
+-#define CMN_CONFIG_WP_DEV_SEL		BIT(48)
+-#define CMN_CONFIG_WP_CHN_SEL		GENMASK(50, 49)
+-#define CMN_CONFIG_WP_GRP		BIT(52)
+-#define CMN_CONFIG_WP_EXCLUSIVE		BIT(53)
+-#define CMN_CONFIG1_WP_VAL		GENMASK(63, 0)
+-#define CMN_CONFIG2_WP_MASK		GENMASK(63, 0)
++#define CMN_CONFIG_WP_COMBINE		GENMASK_ULL(27, 24)
++#define CMN_CONFIG_WP_DEV_SEL		BIT_ULL(48)
++#define CMN_CONFIG_WP_CHN_SEL		GENMASK_ULL(50, 49)
++#define CMN_CONFIG_WP_GRP		BIT_ULL(52)
++#define CMN_CONFIG_WP_EXCLUSIVE		BIT_ULL(53)
++#define CMN_CONFIG1_WP_VAL		GENMASK_ULL(63, 0)
++#define CMN_CONFIG2_WP_MASK		GENMASK_ULL(63, 0)
+ 
+ #define CMN_EVENT_WP_COMBINE(event)	FIELD_GET(CMN_CONFIG_WP_COMBINE, (event)->attr.config)
+ #define CMN_EVENT_WP_DEV_SEL(event)	FIELD_GET(CMN_CONFIG_WP_DEV_SEL, (event)->attr.config)
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0021-perf-arm-cmn-Refactor-node-ID-handling.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0021-perf-arm-cmn-Refactor-node-ID-handling.patch
new file mode 100644
index 0000000..ce4c2e5
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0021-perf-arm-cmn-Refactor-node-ID-handling.patch
@@ -0,0 +1,155 @@
+From 4f4a4cd7c79396fa72870ff712d15e82ebff80cf Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:53 +0000
+Subject: [PATCH 05/14] perf/arm-cmn: Refactor node ID handling
+
+Add a bit more abstraction for the places where we decompose node IDs.
+This will help keep things nice and manageable when we come to add yet
+more variables which affect the node ID format. Also use the opportunity
+to move the rest of the low-level node management helpers back up to the
+logical place they were meant to be - how they ended up buried right in
+the middle of the event-related definitions is somewhat of a mystery...
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/a2242a8c3c96056c13a04ae87bf2047e5e64d2d9.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/a2242a8c3c96056c13a04ae87bf2047e5e64d2d9.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 94 +++++++++++++++++++++++++-----------------
+ 1 file changed, 56 insertions(+), 38 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index e9af79b5f3de..cee301fe0f7e 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -255,6 +255,58 @@ struct arm_cmn {
+ 
+ static int arm_cmn_hp_state;
+ 
++struct arm_cmn_nodeid {
++	u8 x;
++	u8 y;
++	u8 port;
++	u8 dev;
++};
++
++static int arm_cmn_xyidbits(const struct arm_cmn *cmn)
++{
++	int dim = max(cmn->mesh_x, cmn->mesh_y);
++
++	return dim > 4 ? 3 : 2;
++}
++
++static struct arm_cmn_nodeid arm_cmn_nid(const struct arm_cmn *cmn, u16 id)
++{
++	struct arm_cmn_nodeid nid;
++	int bits = arm_cmn_xyidbits(cmn);
++
++	nid.x = CMN_NODEID_X(id, bits);
++	nid.y = CMN_NODEID_Y(id, bits);
++	nid.port = CMN_NODEID_PID(id);
++	nid.dev = CMN_NODEID_DEVID(id);
++
++	return nid;
++}
++
++static void arm_cmn_init_node_to_xp(const struct arm_cmn *cmn,
++				    struct arm_cmn_node *dn)
++{
++	struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
++	int xp_idx = cmn->mesh_x * nid.y + nid.x;
++
++	dn->to_xp = (cmn->xps + xp_idx) - dn;
++}
++
++static struct arm_cmn_node *arm_cmn_node_to_xp(struct arm_cmn_node *dn)
++{
++	return dn->type == CMN_TYPE_XP ? dn : dn + dn->to_xp;
++}
++
++static struct arm_cmn_node *arm_cmn_node(const struct arm_cmn *cmn,
++					 enum cmn_node_type type)
++{
++	int i;
++
++	for (i = 0; i < cmn->num_dns; i++)
++		if (cmn->dns[i].type == type)
++			return &cmn->dns[i];
++	return NULL;
++}
++
+ struct arm_cmn_hw_event {
+ 	struct arm_cmn_node *dn;
+ 	u64 dtm_idx[2];
+@@ -295,38 +347,6 @@ struct arm_cmn_format_attr {
+ 	int config;
+ };
+ 
+-static int arm_cmn_xyidbits(const struct arm_cmn *cmn)
+-{
+-	return cmn->mesh_x > 4 || cmn->mesh_y > 4 ? 3 : 2;
+-}
+-
+-static void arm_cmn_init_node_to_xp(const struct arm_cmn *cmn,
+-				    struct arm_cmn_node *dn)
+-{
+-	int bits = arm_cmn_xyidbits(cmn);
+-	int x = CMN_NODEID_X(dn->id, bits);
+-	int y = CMN_NODEID_Y(dn->id, bits);
+-	int xp_idx = cmn->mesh_x * y + x;
+-
+-	dn->to_xp = (cmn->xps + xp_idx) - dn;
+-}
+-
+-static struct arm_cmn_node *arm_cmn_node_to_xp(struct arm_cmn_node *dn)
+-{
+-	return dn->type == CMN_TYPE_XP ? dn : dn + dn->to_xp;
+-}
+-
+-static struct arm_cmn_node *arm_cmn_node(const struct arm_cmn *cmn,
+-					 enum cmn_node_type type)
+-{
+-	int i;
+-
+-	for (i = 0; i < cmn->num_dns; i++)
+-		if (cmn->dns[i].type == type)
+-			return &cmn->dns[i];
+-	return NULL;
+-}
+-
+ #define CMN_EVENT_ATTR(_name, _type, _eventid, _occupid)		\
+ 	(&((struct arm_cmn_event_attr[]) {{				\
+ 		.attr = __ATTR(_name, 0444, arm_cmn_event_show, NULL),	\
+@@ -966,11 +986,10 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 	}
+ 
+ 	if (!hw->num_dns) {
+-		int bits = arm_cmn_xyidbits(cmn);
++		struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, nodeid);
+ 
+ 		dev_dbg(cmn->dev, "invalid node 0x%x (%d,%d,%d,%d) type 0x%x\n",
+-			nodeid, CMN_NODEID_X(nodeid, bits), CMN_NODEID_Y(nodeid, bits),
+-			CMN_NODEID_PID(nodeid), CMN_NODEID_DEVID(nodeid), type);
++			nodeid, nid.x, nid.y, nid.port, nid.dev, type);
+ 		return -EINVAL;
+ 	}
+ 	/*
+@@ -1068,11 +1087,10 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 			dn->wp_event[wp_idx] = dtc_idx;
+ 			writel_relaxed(cfg, dn->pmu_base + CMN_DTM_WPn_CONFIG(wp_idx));
+ 		} else {
+-			unsigned int port = CMN_NODEID_PID(dn->id);
+-			unsigned int dev = CMN_NODEID_DEVID(dn->id);
++			struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
+ 
+ 			input_sel = CMN__PMEVCNT0_INPUT_SEL_DEV + dtm_idx +
+-				    (port << 4) + (dev << 2);
++				    (nid.port << 4) + (nid.dev << 2);
+ 
+ 			if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event))) {
+ 				int occupid = CMN_EVENT_OCCUPID(event);
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0022-perf-arm-cmn-Streamline-node-iteration.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0022-perf-arm-cmn-Streamline-node-iteration.patch
new file mode 100644
index 0000000..fbe49b2
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0022-perf-arm-cmn-Streamline-node-iteration.patch
@@ -0,0 +1,118 @@
+From 1b8e1ce0ebaa02c4cb7fa615b28c6905b0884e41 Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:54 +0000
+Subject: [PATCH 06/14] perf/arm-cmn: Streamline node iteration
+
+Refactor the places where we scan through the set of nodes to switch
+from explicit array indexing to pointer-based iteration. This leads to
+slightly simpler object code, but also makes the source less dense and
+more pleasant for further development. It also unearths an almost-bug
+in arm_cmn_event_init() where we've been depending on the "array index"
+of NULL relative to cmn->dns being a sufficiently large number, yuck.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/ee0c9eda9a643f46001ac43aadf3f0b1fd5660dd.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/ee0c9eda9a643f46001ac43aadf3f0b1fd5660dd.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 33 ++++++++++++++++++++-------------
+ 1 file changed, 20 insertions(+), 13 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index cee301fe0f7e..77ebed7fae08 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -299,11 +299,11 @@ static struct arm_cmn_node *arm_cmn_node_to_xp(struct arm_cmn_node *dn)
+ static struct arm_cmn_node *arm_cmn_node(const struct arm_cmn *cmn,
+ 					 enum cmn_node_type type)
+ {
+-	int i;
++	struct arm_cmn_node *dn;
+ 
+-	for (i = 0; i < cmn->num_dns; i++)
+-		if (cmn->dns[i].type == type)
+-			return &cmn->dns[i];
++	for (dn = cmn->dns; dn->type; dn++)
++		if (dn->type == type)
++			return dn;
+ 	return NULL;
+ }
+ 
+@@ -941,8 +941,8 @@ static int arm_cmn_event_init(struct perf_event *event)
+ {
+ 	struct arm_cmn *cmn = to_cmn(event->pmu);
+ 	struct arm_cmn_hw_event *hw = to_cmn_hw(event);
++	struct arm_cmn_node *dn;
+ 	enum cmn_node_type type;
+-	unsigned int i;
+ 	bool bynodeid;
+ 	u16 nodeid, eventid;
+ 
+@@ -974,10 +974,12 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 	nodeid = CMN_EVENT_NODEID(event);
+ 
+ 	hw->dn = arm_cmn_node(cmn, type);
+-	for (i = hw->dn - cmn->dns; i < cmn->num_dns && cmn->dns[i].type == type; i++) {
++	if (!hw->dn)
++		return -EINVAL;
++	for (dn = hw->dn; dn->type == type; dn++) {
+ 		if (!bynodeid) {
+ 			hw->num_dns++;
+-		} else if (cmn->dns[i].id != nodeid) {
++		} else if (dn->id != nodeid) {
+ 			hw->dn++;
+ 		} else {
+ 			hw->num_dns = 1;
+@@ -1332,7 +1334,7 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ 
+ 	cmn->xps = arm_cmn_node(cmn, CMN_TYPE_XP);
+ 
+-	for (dn = cmn->dns; dn < cmn->dns + cmn->num_dns; dn++) {
++	for (dn = cmn->dns; dn->type; dn++) {
+ 		if (dn->type != CMN_TYPE_XP)
+ 			arm_cmn_init_node_to_xp(cmn, dn);
+ 		else if (cmn->num_dtcs == 1)
+@@ -1382,6 +1384,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	u32 xp_offset[CMN_MAX_XPS];
+ 	u64 reg;
+ 	int i, j;
++	size_t sz;
+ 
+ 	cfg_region = cmn->base + rgn_offset;
+ 	reg = readl_relaxed(cfg_region + CMN_CFGM_PERIPH_ID_2);
+@@ -1408,14 +1411,13 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		cmn->num_dns += FIELD_GET(CMN_CI_CHILD_COUNT, reg);
+ 	}
+ 
+-	/* Cheeky +1 to help terminate pointer-based iteration */
+-	cmn->dns = devm_kcalloc(cmn->dev, cmn->num_dns + 1,
+-				sizeof(*cmn->dns), GFP_KERNEL);
+-	if (!cmn->dns)
++	/* Cheeky +1 to help terminate pointer-based iteration later */
++	dn = devm_kcalloc(cmn->dev, cmn->num_dns + 1, sizeof(*dn), GFP_KERNEL);
++	if (!dn)
+ 		return -ENOMEM;
+ 
+ 	/* Pass 2: now we can actually populate the nodes */
+-	dn = cmn->dns;
++	cmn->dns = dn;
+ 	for (i = 0; i < cmn->num_xps; i++) {
+ 		void __iomem *xp_region = cmn->base + xp_offset[i];
+ 		struct arm_cmn_node *xp = dn++;
+@@ -1484,6 +1486,11 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	/* Correct for any nodes we skipped */
+ 	cmn->num_dns = dn - cmn->dns;
+ 
++	sz = (void *)(dn + 1) - (void *)cmn->dns;
++	dn = devm_krealloc(cmn->dev, cmn->dns, sz, GFP_KERNEL);
++	if (dn)
++		cmn->dns = dn;
++
+ 	/*
+ 	 * If mesh_x wasn't set during discovery then we never saw
+ 	 * an XP at (0,1), thus we must have an Nx1 configuration.
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0023-drivers-perf-arm-cmn-Add-space-after.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0023-drivers-perf-arm-cmn-Add-space-after.patch
new file mode 100644
index 0000000..3b11192
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0023-drivers-perf-arm-cmn-Add-space-after.patch
@@ -0,0 +1,34 @@
+From c3e137a2231f434f623593b6951c7575d22e1cdb Mon Sep 17 00:00:00 2001
+From: Junhao He <hejunhao2@hisilicon.com>
+Date: Tue, 11 May 2021 20:27:33 +0800
+Subject: [PATCH 07/14] drivers/perf: arm-cmn: Add space after ','
+
+Fix a warning from checkpatch.pl.
+
+ERROR: space required after that ',' (ctx:VxV)
+
+Signed-off-by: Junhao He <hejunhao2@hisilicon.com>
+Signed-off-by: Jay Fang <f.fangjian@huawei.com>
+
+Upstream-Status: Backport [https://lore.kernel.org/all/1620736054-58412-4-git-send-email-f.fangjian@huawei.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 77ebed7fae08..e9f27f7776a2 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -32,7 +32,7 @@
+ #define CMN_CI_CHILD_COUNT		GENMASK_ULL(15, 0)
+ #define CMN_CI_CHILD_PTR_OFFSET		GENMASK_ULL(31, 16)
+ 
+-#define CMN_CHILD_NODE_ADDR		GENMASK(27,0)
++#define CMN_CHILD_NODE_ADDR		GENMASK(27, 0)
+ #define CMN_CHILD_NODE_EXTERNAL		BIT(31)
+ 
+ #define CMN_ADDR_NODE_PTR		GENMASK(27, 14)
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0024-perf-arm-cmn-Refactor-DTM-handling.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0024-perf-arm-cmn-Refactor-DTM-handling.patch
new file mode 100644
index 0000000..6a68a79
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0024-perf-arm-cmn-Refactor-DTM-handling.patch
@@ -0,0 +1,406 @@
+From 79bbc3eeee54b2e039dd4822e4a643e71adfbb04 Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:55 +0000
+Subject: [PATCH 08/14] perf/arm-cmn: Refactor DTM handling
+
+Untangle DTMs from XPs into a dedicated abstraction. This helps make
+things a little more obvious and robust, but primarily paves the way
+for further development where new IPs can grow extra DTMs per XP.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/9cca18b1b98f482df7f1aaf3d3213e7f39500423.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/9cca18b1b98f482df7f1aaf3d3213e7f39500423.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 169 +++++++++++++++++++++--------------------
+ 1 file changed, 87 insertions(+), 82 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index e9f27f7776a2..2ae3e92690a7 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -35,14 +35,9 @@
+ #define CMN_CHILD_NODE_ADDR		GENMASK(27, 0)
+ #define CMN_CHILD_NODE_EXTERNAL		BIT(31)
+ 
+-#define CMN_ADDR_NODE_PTR		GENMASK(27, 14)
+-
+-#define CMN_NODE_PTR_DEVID(ptr)		(((ptr) >> 2) & 3)
+-#define CMN_NODE_PTR_PID(ptr)		((ptr) & 1)
+-#define CMN_NODE_PTR_X(ptr, bits)	((ptr) >> (6 + (bits)))
+-#define CMN_NODE_PTR_Y(ptr, bits)	(((ptr) >> 6) & ((1U << (bits)) - 1))
+-
+-#define CMN_MAX_XPS			(8 * 8)
++#define CMN_MAX_DIMENSION		8
++#define CMN_MAX_XPS			(CMN_MAX_DIMENSION * CMN_MAX_DIMENSION)
++#define CMN_MAX_DTMS			CMN_MAX_XPS
+ 
+ /* The CFG node has one other useful purpose */
+ #define CMN_CFGM_PERIPH_ID_2		0x0010
+@@ -190,32 +185,32 @@ struct arm_cmn_node {
+ 	u16 id, logid;
+ 	enum cmn_node_type type;
+ 
++	int dtm;
+ 	union {
+-		/* Device node */
++		/* DN/HN-F/CXHA */
+ 		struct {
+-			int to_xp;
+-			/* DN/HN-F/CXHA */
+-			unsigned int occupid_val;
+-			unsigned int occupid_count;
++			u8 occupid_val;
++			u8 occupid_count;
+ 		};
+ 		/* XP */
+-		struct {
+-			int dtc;
+-			u32 pmu_config_low;
+-			union {
+-				u8 input_sel[4];
+-				__le32 pmu_config_high;
+-			};
+-			s8 wp_event[4];
+-		};
++		int dtc;
+ 	};
+-
+ 	union {
+ 		u8 event[4];
+ 		__le32 event_sel;
+ 	};
+ };
+ 
++struct arm_cmn_dtm {
++	void __iomem *base;
++	u32 pmu_config_low;
++	union {
++		u8 input_sel[4];
++		__le32 pmu_config_high;
++	};
++	s8 wp_event[4];
++};
++
+ struct arm_cmn_dtc {
+ 	void __iomem *base;
+ 	int irq;
+@@ -241,6 +236,7 @@ struct arm_cmn {
+ 	struct arm_cmn_node *xps;
+ 	struct arm_cmn_node *dns;
+ 
++	struct arm_cmn_dtm *dtms;
+ 	struct arm_cmn_dtc *dtc;
+ 	unsigned int num_dtcs;
+ 
+@@ -282,20 +278,14 @@ static struct arm_cmn_nodeid arm_cmn_nid(const struct arm_cmn *cmn, u16 id)
+ 	return nid;
+ }
+ 
+-static void arm_cmn_init_node_to_xp(const struct arm_cmn *cmn,
+-				    struct arm_cmn_node *dn)
++static struct arm_cmn_node *arm_cmn_node_to_xp(const struct arm_cmn *cmn,
++					       const struct arm_cmn_node *dn)
+ {
+ 	struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
+ 	int xp_idx = cmn->mesh_x * nid.y + nid.x;
+ 
+-	dn->to_xp = (cmn->xps + xp_idx) - dn;
+-}
+-
+-static struct arm_cmn_node *arm_cmn_node_to_xp(struct arm_cmn_node *dn)
+-{
+-	return dn->type == CMN_TYPE_XP ? dn : dn + dn->to_xp;
++	return cmn->xps + xp_idx;
+ }
+-
+ static struct arm_cmn_node *arm_cmn_node(const struct arm_cmn *cmn,
+ 					 enum cmn_node_type type)
+ {
+@@ -706,9 +696,9 @@ static u64 arm_cmn_read_dtm(struct arm_cmn *cmn, struct arm_cmn_hw_event *hw,
+ 
+ 	offset = snapshot ? CMN_DTM_PMEVCNTSR : CMN_DTM_PMEVCNT;
+ 	for_each_hw_dn(hw, dn, i) {
+-		struct arm_cmn_node *xp = arm_cmn_node_to_xp(dn);
++		struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm];
+ 		int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+-		u64 reg = readq_relaxed(xp->pmu_base + offset);
++		u64 reg = readq_relaxed(dtm->base + offset);
+ 		u16 dtm_count = reg >> (dtm_idx * 16);
+ 
+ 		count += dtm_count;
+@@ -835,9 +825,9 @@ static void arm_cmn_event_stop(struct perf_event *event, int flags)
+ }
+ 
+ struct arm_cmn_val {
+-	u8 dtm_count[CMN_MAX_XPS];
+-	u8 occupid[CMN_MAX_XPS];
+-	u8 wp[CMN_MAX_XPS][4];
++	u8 dtm_count[CMN_MAX_DTMS];
++	u8 occupid[CMN_MAX_DTMS];
++	u8 wp[CMN_MAX_DTMS][4];
+ 	int dtc_count;
+ 	bool cycles;
+ };
+@@ -866,16 +856,16 @@ static void arm_cmn_val_add_event(struct arm_cmn_val *val, struct perf_event *ev
+ 		occupid = 0;
+ 
+ 	for_each_hw_dn(hw, dn, i) {
+-		int wp_idx, xp = arm_cmn_node_to_xp(dn)->logid;
++		int wp_idx, dtm = dn->dtm;
+ 
+-		val->dtm_count[xp]++;
+-		val->occupid[xp] = occupid;
++		val->dtm_count[dtm]++;
++		val->occupid[dtm] = occupid;
+ 
+ 		if (type != CMN_TYPE_WP)
+ 			continue;
+ 
+ 		wp_idx = arm_cmn_wp_idx(event);
+-		val->wp[xp][wp_idx] = CMN_EVENT_WP_COMBINE(event) + 1;
++		val->wp[dtm][wp_idx] = CMN_EVENT_WP_COMBINE(event) + 1;
+ 	}
+ }
+ 
+@@ -914,22 +904,22 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 		occupid = 0;
+ 
+ 	for_each_hw_dn(hw, dn, i) {
+-		int wp_idx, wp_cmb, xp = arm_cmn_node_to_xp(dn)->logid;
++		int wp_idx, wp_cmb, dtm = dn->dtm;
+ 
+-		if (val.dtm_count[xp] == CMN_DTM_NUM_COUNTERS)
++		if (val.dtm_count[dtm] == CMN_DTM_NUM_COUNTERS)
+ 			return -EINVAL;
+ 
+-		if (occupid && val.occupid[xp] && occupid != val.occupid[xp])
++		if (occupid && val.occupid[dtm] && occupid != val.occupid[dtm])
+ 			return -EINVAL;
+ 
+ 		if (type != CMN_TYPE_WP)
+ 			continue;
+ 
+ 		wp_idx = arm_cmn_wp_idx(event);
+-		if (val.wp[xp][wp_idx])
++		if (val.wp[dtm][wp_idx])
+ 			return -EINVAL;
+ 
+-		wp_cmb = val.wp[xp][wp_idx ^ 1];
++		wp_cmb = val.wp[dtm][wp_idx ^ 1];
+ 		if (wp_cmb && wp_cmb != CMN_EVENT_WP_COMBINE(event) + 1)
+ 			return -EINVAL;
+ 	}
+@@ -1010,17 +1000,17 @@ static void arm_cmn_event_clear(struct arm_cmn *cmn, struct perf_event *event,
+ 	enum cmn_node_type type = CMN_EVENT_TYPE(event);
+ 
+ 	while (i--) {
+-		struct arm_cmn_node *xp = arm_cmn_node_to_xp(hw->dn + i);
++		struct arm_cmn_dtm *dtm = &cmn->dtms[hw->dn[i].dtm];
+ 		unsigned int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+ 
+ 		if (type == CMN_TYPE_WP)
+-			hw->dn[i].wp_event[arm_cmn_wp_idx(event)] = -1;
++			dtm->wp_event[arm_cmn_wp_idx(event)] = -1;
+ 
+ 		if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event)))
+ 			hw->dn[i].occupid_count--;
+ 
+-		xp->pmu_config_low &= ~CMN__PMEVCNT_PAIRED(dtm_idx);
+-		writel_relaxed(xp->pmu_config_low, xp->pmu_base + CMN_DTM_PMU_CONFIG);
++		dtm->pmu_config_low &= ~CMN__PMEVCNT_PAIRED(dtm_idx);
++		writel_relaxed(dtm->pmu_config_low, dtm->base + CMN_DTM_PMU_CONFIG);
+ 	}
+ 	memset(hw->dtm_idx, 0, sizeof(hw->dtm_idx));
+ 
+@@ -1062,12 +1052,12 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 
+ 	/* ...then the local counters to feed it. */
+ 	for_each_hw_dn(hw, dn, i) {
+-		struct arm_cmn_node *xp = arm_cmn_node_to_xp(dn);
++		struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm];
+ 		unsigned int dtm_idx, shift;
+ 		u64 reg;
+ 
+ 		dtm_idx = 0;
+-		while (xp->pmu_config_low & CMN__PMEVCNT_PAIRED(dtm_idx))
++		while (dtm->pmu_config_low & CMN__PMEVCNT_PAIRED(dtm_idx))
+ 			if (++dtm_idx == CMN_DTM_NUM_COUNTERS)
+ 				goto free_dtms;
+ 
+@@ -1077,17 +1067,17 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 			int tmp, wp_idx = arm_cmn_wp_idx(event);
+ 			u32 cfg = arm_cmn_wp_config(event);
+ 
+-			if (dn->wp_event[wp_idx] >= 0)
++			if (dtm->wp_event[wp_idx] >= 0)
+ 				goto free_dtms;
+ 
+-			tmp = dn->wp_event[wp_idx ^ 1];
++			tmp = dtm->wp_event[wp_idx ^ 1];
+ 			if (tmp >= 0 && CMN_EVENT_WP_COMBINE(event) !=
+ 					CMN_EVENT_WP_COMBINE(dtc->counters[tmp]))
+ 				goto free_dtms;
+ 
+ 			input_sel = CMN__PMEVCNT0_INPUT_SEL_WP + wp_idx;
+-			dn->wp_event[wp_idx] = dtc_idx;
+-			writel_relaxed(cfg, dn->pmu_base + CMN_DTM_WPn_CONFIG(wp_idx));
++			dtm->wp_event[wp_idx] = dtc_idx;
++			writel_relaxed(cfg, dtm->base + CMN_DTM_WPn_CONFIG(wp_idx));
+ 		} else {
+ 			struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
+ 
+@@ -1095,7 +1085,7 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 				    (nid.port << 4) + (nid.dev << 2);
+ 
+ 			if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event))) {
+-				int occupid = CMN_EVENT_OCCUPID(event);
++				u8 occupid = CMN_EVENT_OCCUPID(event);
+ 
+ 				if (dn->occupid_count == 0) {
+ 					dn->occupid_val = occupid;
+@@ -1110,13 +1100,13 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 
+ 		arm_cmn_set_index(hw->dtm_idx, i, dtm_idx);
+ 
+-		xp->input_sel[dtm_idx] = input_sel;
++		dtm->input_sel[dtm_idx] = input_sel;
+ 		shift = CMN__PMEVCNTn_GLOBAL_NUM_SHIFT(dtm_idx);
+-		xp->pmu_config_low &= ~(CMN__PMEVCNT0_GLOBAL_NUM << shift);
+-		xp->pmu_config_low |= FIELD_PREP(CMN__PMEVCNT0_GLOBAL_NUM, dtc_idx) << shift;
+-		xp->pmu_config_low |= CMN__PMEVCNT_PAIRED(dtm_idx);
+-		reg = (u64)le32_to_cpu(xp->pmu_config_high) << 32 | xp->pmu_config_low;
+-		writeq_relaxed(reg, xp->pmu_base + CMN_DTM_PMU_CONFIG);
++		dtm->pmu_config_low &= ~(CMN__PMEVCNT0_GLOBAL_NUM << shift);
++		dtm->pmu_config_low |= FIELD_PREP(CMN__PMEVCNT0_GLOBAL_NUM, dtc_idx) << shift;
++		dtm->pmu_config_low |= CMN__PMEVCNT_PAIRED(dtm_idx);
++		reg = (u64)le32_to_cpu(dtm->pmu_config_high) << 32 | dtm->pmu_config_low;
++		writeq_relaxed(reg, dtm->base + CMN_DTM_PMU_CONFIG);
+ 	}
+ 
+ 	/* Go go go! */
+@@ -1276,23 +1266,22 @@ static int arm_cmn_init_irqs(struct arm_cmn *cmn)
+ 	return 0;
+ }
+ 
+-static void arm_cmn_init_dtm(struct arm_cmn_node *xp)
++static void arm_cmn_init_dtm(struct arm_cmn_dtm *dtm, struct arm_cmn_node *xp)
+ {
+ 	int i;
+ 
++	dtm->base = xp->pmu_base;
++	dtm->pmu_config_low = CMN_DTM_PMU_CONFIG_PMU_EN;
+ 	for (i = 0; i < 4; i++) {
+-		xp->wp_event[i] = -1;
+-		writeq_relaxed(0, xp->pmu_base + CMN_DTM_WPn_MASK(i));
+-		writeq_relaxed(~0ULL, xp->pmu_base + CMN_DTM_WPn_VAL(i));
++		dtm->wp_event[i] = -1;
++		writeq_relaxed(0, dtm->base + CMN_DTM_WPn_MASK(i));
++		writeq_relaxed(~0ULL, dtm->base + CMN_DTM_WPn_VAL(i));
+ 	}
+-	xp->pmu_config_low = CMN_DTM_PMU_CONFIG_PMU_EN;
+-	xp->dtc = -1;
+ }
+ 
+ static int arm_cmn_init_dtc(struct arm_cmn *cmn, struct arm_cmn_node *dn, int idx)
+ {
+ 	struct arm_cmn_dtc *dtc = cmn->dtc + idx;
+-	struct arm_cmn_node *xp;
+ 
+ 	dtc->base = dn->pmu_base - CMN_PMU_OFFSET;
+ 	dtc->irq = platform_get_irq(to_platform_device(cmn->dev), idx);
+@@ -1303,10 +1292,6 @@ static int arm_cmn_init_dtc(struct arm_cmn *cmn, struct arm_cmn_node *dn, int id
+ 	writel_relaxed(0x1ff, dtc->base + CMN_DT_PMOVSR_CLR);
+ 	writel_relaxed(CMN_DT_PMCR_OVFL_INTR_EN, dtc->base + CMN_DT_PMCR);
+ 
+-	/* We do at least know that a DTC's XP must be in that DTC's domain */
+-	xp = arm_cmn_node_to_xp(dn);
+-	xp->dtc = idx;
+-
+ 	return 0;
+ }
+ 
+@@ -1323,7 +1308,7 @@ static int arm_cmn_node_cmp(const void *a, const void *b)
+ 
+ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ {
+-	struct arm_cmn_node *dn;
++	struct arm_cmn_node *dn, *xp;
+ 	int dtc_idx = 0;
+ 
+ 	cmn->dtc = devm_kcalloc(cmn->dev, cmn->num_dtcs, sizeof(cmn->dtc[0]), GFP_KERNEL);
+@@ -1335,13 +1320,24 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ 	cmn->xps = arm_cmn_node(cmn, CMN_TYPE_XP);
+ 
+ 	for (dn = cmn->dns; dn->type; dn++) {
+-		if (dn->type != CMN_TYPE_XP)
+-			arm_cmn_init_node_to_xp(cmn, dn);
+-		else if (cmn->num_dtcs == 1)
+-			dn->dtc = 0;
++		if (dn->type == CMN_TYPE_XP) {
++			if (dn->dtc < 0 && cmn->num_dtcs == 1)
++				dn->dtc = 0;
++			continue;
++		}
+ 
+-		if (dn->type == CMN_TYPE_DTC)
+-			arm_cmn_init_dtc(cmn, dn, dtc_idx++);
++		xp = arm_cmn_node_to_xp(cmn, dn);
++		dn->dtm = xp->dtm;
++
++		if (dn->type == CMN_TYPE_DTC) {
++			int err;
++			/* We do at least know that a DTC's XP must be in that DTC's domain */
++			if (xp->dtc < 0)
++				xp->dtc = dtc_idx;
++			err = arm_cmn_init_dtc(cmn, dn, dtc_idx++);
++			if (err)
++				return err;
++		}
+ 
+ 		/* To the PMU, RN-Ds don't add anything over RN-Is, so smoosh them together */
+ 		if (dn->type == CMN_TYPE_RND)
+@@ -1380,6 +1376,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ {
+ 	void __iomem *cfg_region;
+ 	struct arm_cmn_node cfg, *dn;
++	struct arm_cmn_dtm *dtm;
+ 	u16 child_count, child_poff;
+ 	u32 xp_offset[CMN_MAX_XPS];
+ 	u64 reg;
+@@ -1416,14 +1413,18 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	if (!dn)
+ 		return -ENOMEM;
+ 
++	dtm = devm_kcalloc(cmn->dev, cmn->num_xps, sizeof(*dtm), GFP_KERNEL);
++	if (!dtm)
++		return -ENOMEM;
++
+ 	/* Pass 2: now we can actually populate the nodes */
+ 	cmn->dns = dn;
++	cmn->dtms = dtm;
+ 	for (i = 0; i < cmn->num_xps; i++) {
+ 		void __iomem *xp_region = cmn->base + xp_offset[i];
+ 		struct arm_cmn_node *xp = dn++;
+ 
+ 		arm_cmn_init_node_info(cmn, xp_offset[i], xp);
+-		arm_cmn_init_dtm(xp);
+ 		/*
+ 		 * Thanks to the order in which XP logical IDs seem to be
+ 		 * assigned, we can handily infer the mesh X dimension by
+@@ -1433,6 +1434,10 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		if (xp->id == (1 << 3))
+ 			cmn->mesh_x = xp->logid;
+ 
++		xp->dtc = -1;
++		xp->dtm = dtm - cmn->dtms;
++		arm_cmn_init_dtm(dtm++, xp);
++
+ 		reg = readq_relaxed(xp_region + CMN_CHILD_INFO);
+ 		child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
+ 		child_poff = FIELD_GET(CMN_CI_CHILD_PTR_OFFSET, reg);
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0025-perf-arm-cmn-Optimise-DTM-counter-reads.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0025-perf-arm-cmn-Optimise-DTM-counter-reads.patch
new file mode 100644
index 0000000..af33468
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0025-perf-arm-cmn-Optimise-DTM-counter-reads.patch
@@ -0,0 +1,56 @@
+From a63878c01597e21451c2b3f239cbf0a2fbdeeadf Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:56 +0000
+Subject: [PATCH 09/14] perf/arm-cmn: Optimise DTM counter reads
+
+When multiple nodes of the same type are connected to the same XP
+(particularly in CAL configurations), it seems that they are likely
+to be consecutive in logical ID. Therefore, we're likely to gain a
+small benefit from an easy tweak to optimise out consecutive reads
+of the same set of DTM counters for an aggregated event.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/7777d77c2df17693cd3dabb6e268906e15238d82.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/7777d77c2df17693cd3dabb6e268906e15238d82.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 17 +++++++++--------
+ 1 file changed, 9 insertions(+), 8 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 2ae3e92690a7..5fa31ebc1fce 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -690,18 +690,19 @@ static void arm_cmn_pmu_disable(struct pmu *pmu)
+ static u64 arm_cmn_read_dtm(struct arm_cmn *cmn, struct arm_cmn_hw_event *hw,
+ 			    bool snapshot)
+ {
++	struct arm_cmn_dtm *dtm = NULL;
+ 	struct arm_cmn_node *dn;
+-	unsigned int i, offset;
+-	u64 count = 0;
++	unsigned int i, offset, dtm_idx;
++	u64 reg, count = 0;
+ 
+ 	offset = snapshot ? CMN_DTM_PMEVCNTSR : CMN_DTM_PMEVCNT;
+ 	for_each_hw_dn(hw, dn, i) {
+-		struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm];
+-		int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+-		u64 reg = readq_relaxed(dtm->base + offset);
+-		u16 dtm_count = reg >> (dtm_idx * 16);
+-
+-		count += dtm_count;
++		if (dtm != &cmn->dtms[dn->dtm]) {
++			dtm = &cmn->dtms[dn->dtm];
++			reg = readq_relaxed(dtm->base + offset);
++		}
++		dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
++		count += (u16)(reg >> (dtm_idx * 16));
+ 	}
+ 	return count;
+ }
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0026-perf-arm-cmn-Optimise-DTC-counter-accesses.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0026-perf-arm-cmn-Optimise-DTC-counter-accesses.patch
new file mode 100644
index 0000000..56334e8
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0026-perf-arm-cmn-Optimise-DTC-counter-accesses.patch
@@ -0,0 +1,111 @@
+From 782b7cd98e6a6b8c5fcd9e20f5c534617b1f04d3 Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:57 +0000
+Subject: [PATCH 10/14] perf/arm-cmn: Optimise DTC counter accesses
+
+In cases where we do know which DTC domain a node belongs to, we can
+skip initialising or reading the global count in DTCs where we know
+it won't change. The machinery to achieve that is mostly in place
+already, so finish hooking it up by converting the vestigial domain
+tracking to propagate suitable bitmaps all the way through to events.
+
+Note that this does not allow allocating such an unused counter to a
+different event on that DTC, because that is a flippin' nightmare.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/51d930fd945ef51c81f5889ccca055c302b0a1d0.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/51d930fd945ef51c81f5889ccca055c302b0a1d0.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 29 ++++++++++++-----------------
+ 1 file changed, 12 insertions(+), 17 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 5fa31ebc1fce..2204d6500814 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -193,7 +193,7 @@ struct arm_cmn_node {
+ 			u8 occupid_count;
+ 		};
+ 		/* XP */
+-		int dtc;
++		u8 dtc;
+ 	};
+ 	union {
+ 		u8 event[4];
+@@ -968,14 +968,14 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 	if (!hw->dn)
+ 		return -EINVAL;
+ 	for (dn = hw->dn; dn->type == type; dn++) {
+-		if (!bynodeid) {
+-			hw->num_dns++;
+-		} else if (dn->id != nodeid) {
++		if (bynodeid && dn->id != nodeid) {
+ 			hw->dn++;
+-		} else {
+-			hw->num_dns = 1;
+-			break;
++			continue;
+ 		}
++		hw->dtcs_used |= arm_cmn_node_to_xp(cmn, dn)->dtc;
++		hw->num_dns++;
++		if (bynodeid)
++			break;
+ 	}
+ 
+ 	if (!hw->num_dns) {
+@@ -985,11 +985,6 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 			nodeid, nid.x, nid.y, nid.port, nid.dev, type);
+ 		return -EINVAL;
+ 	}
+-	/*
+-	 * By assuming events count in all DTC domains, we cunningly avoid
+-	 * needing to know anything about how XPs are assigned to domains.
+-	 */
+-	hw->dtcs_used = (1U << cmn->num_dtcs) - 1;
+ 
+ 	return arm_cmn_validate_group(event);
+ }
+@@ -1311,6 +1306,7 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ {
+ 	struct arm_cmn_node *dn, *xp;
+ 	int dtc_idx = 0;
++	u8 dtcs_present = (1 << cmn->num_dtcs) - 1;
+ 
+ 	cmn->dtc = devm_kcalloc(cmn->dev, cmn->num_dtcs, sizeof(cmn->dtc[0]), GFP_KERNEL);
+ 	if (!cmn->dtc)
+@@ -1322,8 +1318,7 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ 
+ 	for (dn = cmn->dns; dn->type; dn++) {
+ 		if (dn->type == CMN_TYPE_XP) {
+-			if (dn->dtc < 0 && cmn->num_dtcs == 1)
+-				dn->dtc = 0;
++			dn->dtc &= dtcs_present;
+ 			continue;
+ 		}
+ 
+@@ -1333,8 +1328,8 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ 		if (dn->type == CMN_TYPE_DTC) {
+ 			int err;
+ 			/* We do at least know that a DTC's XP must be in that DTC's domain */
+-			if (xp->dtc < 0)
+-				xp->dtc = dtc_idx;
++			if (xp->dtc == 0xf)
++				xp->dtc = 1 << dtc_idx;
+ 			err = arm_cmn_init_dtc(cmn, dn, dtc_idx++);
+ 			if (err)
+ 				return err;
+@@ -1435,7 +1430,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		if (xp->id == (1 << 3))
+ 			cmn->mesh_x = xp->logid;
+ 
+-		xp->dtc = -1;
++		xp->dtc = 0xf;
+ 		xp->dtm = dtm - cmn->dtms;
+ 		arm_cmn_init_dtm(dtm++, xp);
+ 
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0027-perf-arm-cmn-Move-group-validation-data-off-stack.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0027-perf-arm-cmn-Move-group-validation-data-off-stack.patch
new file mode 100644
index 0000000..06adc56
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0027-perf-arm-cmn-Move-group-validation-data-off-stack.patch
@@ -0,0 +1,108 @@
+From d919e8bcbb790018e097cb8a01e7c840dcdb82aa Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:58 +0000
+Subject: [PATCH 11/14] perf/arm-cmn: Move group validation data off-stack
+
+With the value of CMN_MAX_DTMS increasing significantly, our validation
+data structure is set to get quite big. Technically we could pack it at
+least twice as densely, since we only need around 19 bits of information
+per DTM, but that makes the code even more mind-bogglingly impenetrable,
+and even half of "quite big" may still be uncomfortably large for a
+stack frame (~1KB). Just move it to an off-stack allocation instead.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/0cabff2e5839ddc0979e757c55515966f65359e4.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/0cabff2e5839ddc0979e757c55515966f65359e4.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 43 ++++++++++++++++++++++++------------------
+ 1 file changed, 25 insertions(+), 18 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 2204d6500814..b89a081d26ff 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -876,8 +876,8 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 	struct arm_cmn_node *dn;
+ 	struct perf_event *sibling, *leader = event->group_leader;
+ 	enum cmn_node_type type;
+-	struct arm_cmn_val val;
+-	int i;
++	struct arm_cmn_val *val;
++	int i, ret = -EINVAL;
+ 	u8 occupid;
+ 
+ 	if (leader == event)
+@@ -886,18 +886,22 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 	if (event->pmu != leader->pmu && !is_software_event(leader))
+ 		return -EINVAL;
+ 
+-	memset(&val, 0, sizeof(val));
++	val = kzalloc(sizeof(*val), GFP_KERNEL);
++	if (!val)
++		return -ENOMEM;
+ 
+-	arm_cmn_val_add_event(&val, leader);
++	arm_cmn_val_add_event(val, leader);
+ 	for_each_sibling_event(sibling, leader)
+-		arm_cmn_val_add_event(&val, sibling);
++		arm_cmn_val_add_event(val, sibling);
+ 
+ 	type = CMN_EVENT_TYPE(event);
+-	if (type == CMN_TYPE_DTC)
+-		return val.cycles ? -EINVAL : 0;
++	if (type == CMN_TYPE_DTC) {
++		ret = val->cycles ? -EINVAL : 0;
++		goto done;
++	}
+ 
+-	if (val.dtc_count == CMN_DT_NUM_COUNTERS)
+-		return -EINVAL;
++	if (val->dtc_count == CMN_DT_NUM_COUNTERS)
++		goto done;
+ 
+ 	if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event)))
+ 		occupid = CMN_EVENT_OCCUPID(event) + 1;
+@@ -907,25 +911,28 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 	for_each_hw_dn(hw, dn, i) {
+ 		int wp_idx, wp_cmb, dtm = dn->dtm;
+ 
+-		if (val.dtm_count[dtm] == CMN_DTM_NUM_COUNTERS)
+-			return -EINVAL;
++		if (val->dtm_count[dtm] == CMN_DTM_NUM_COUNTERS)
++			goto done;
+ 
+-		if (occupid && val.occupid[dtm] && occupid != val.occupid[dtm])
+-			return -EINVAL;
++		if (occupid && val->occupid[dtm] && occupid != val->occupid[dtm])
++			goto done;
+ 
+ 		if (type != CMN_TYPE_WP)
+ 			continue;
+ 
+ 		wp_idx = arm_cmn_wp_idx(event);
+-		if (val.wp[dtm][wp_idx])
+-			return -EINVAL;
++		if (val->wp[dtm][wp_idx])
++			goto done;
+ 
+-		wp_cmb = val.wp[dtm][wp_idx ^ 1];
++		wp_cmb = val->wp[dtm][wp_idx ^ 1];
+ 		if (wp_cmb && wp_cmb != CMN_EVENT_WP_COMBINE(event) + 1)
+-			return -EINVAL;
++			goto done;
+ 	}
+ 
+-	return 0;
++	ret = 0;
++done:
++	kfree(val);
++	return ret;
+ }
+ 
+ static int arm_cmn_event_init(struct perf_event *event)
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0028-perf-arm-cmn-Demarcate-CMN-600-specifics.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0028-perf-arm-cmn-Demarcate-CMN-600-specifics.patch
new file mode 100644
index 0000000..0fbc5cb
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0028-perf-arm-cmn-Demarcate-CMN-600-specifics.patch
@@ -0,0 +1,466 @@
+From 7400784247be42beb996f7538547c56acd6cfa0c Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:44:59 +0000
+Subject: [PATCH 12/14] perf/arm-cmn: Demarcate CMN-600 specifics
+
+In preparation for supporting newer CMN products, let's introduce a
+means to differentiate the features and events which are specific to a
+particular IP from those which remain common to the whole family. The
+newer designs have also smoothed off some of the rough edges in terms
+of discoverability, so separate out the parts of the flow which have
+effectively now become CMN-600 quirks.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/9f6368cdca4c821d801138939508a5bba54ccabb.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/9f6368cdca4c821d801138939508a5bba54ccabb.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 313 +++++++++++++++++++++--------------------
+ 1 file changed, 162 insertions(+), 151 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index b89a081d26ff..92ff273fbe58 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -151,7 +151,12 @@
+ #define CMN_WP_DOWN			2
+ 
+ 
+-/* r0px probably don't exist in silicon, thankfully */
++enum cmn_model {
++	CMN_ANY = -1,
++	CMN600 = 1,
++};
++
++/* CMN-600 r0px shouldn't exist in silicon, thankfully */
+ enum cmn_revision {
+ 	CMN600_R1P0,
+ 	CMN600_R1P1,
+@@ -159,6 +164,7 @@ enum cmn_revision {
+ 	CMN600_R1P3,
+ 	CMN600_R2P0,
+ 	CMN600_R3P0,
++	CMN600_R3P1,
+ };
+ 
+ enum cmn_node_type {
+@@ -229,6 +235,7 @@ struct arm_cmn {
+ 	void __iomem *base;
+ 
+ 	enum cmn_revision rev;
++	enum cmn_model model;
+ 	u8 mesh_x;
+ 	u8 mesh_y;
+ 	u16 num_xps;
+@@ -326,6 +333,7 @@ static unsigned int arm_cmn_get_index(u64 x[], unsigned int pos)
+ 
+ struct arm_cmn_event_attr {
+ 	struct device_attribute attr;
++	enum cmn_model model;
+ 	enum cmn_node_type type;
+ 	u8 eventid;
+ 	u8 occupid;
+@@ -337,9 +345,10 @@ struct arm_cmn_format_attr {
+ 	int config;
+ };
+ 
+-#define CMN_EVENT_ATTR(_name, _type, _eventid, _occupid)		\
++#define CMN_EVENT_ATTR(_model, _name, _type, _eventid, _occupid)	\
+ 	(&((struct arm_cmn_event_attr[]) {{				\
+ 		.attr = __ATTR(_name, 0444, arm_cmn_event_show, NULL),	\
++		.model = _model,					\
+ 		.type = _type,						\
+ 		.eventid = _eventid,					\
+ 		.occupid = _occupid,					\
+@@ -386,12 +395,15 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
+ 	eattr = container_of(attr, typeof(*eattr), attr.attr);
+ 	type = eattr->type;
+ 
++	if (!(eattr->model & cmn->model))
++		return 0;
++
+ 	/* Watchpoints aren't nodes */
+ 	if (type == CMN_TYPE_WP)
+ 		type = CMN_TYPE_XP;
+ 
+ 	/* Revision-specific differences */
+-	if (cmn->rev < CMN600_R1P2) {
++	if (cmn->model == CMN600 && cmn->rev < CMN600_R1P2) {
+ 		if (type == CMN_TYPE_HNF && eattr->eventid == 0x1b)
+ 			return 0;
+ 	}
+@@ -402,25 +414,27 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
+ 	return attr->mode;
+ }
+ 
+-#define _CMN_EVENT_DVM(_name, _event, _occup)			\
+-	CMN_EVENT_ATTR(dn_##_name, CMN_TYPE_DVM, _event, _occup)
++#define _CMN_EVENT_DVM(_model, _name, _event, _occup)		\
++	CMN_EVENT_ATTR(_model, dn_##_name, CMN_TYPE_DVM, _event, _occup)
+ #define CMN_EVENT_DTC(_name)					\
+-	CMN_EVENT_ATTR(dtc_##_name, CMN_TYPE_DTC, 0, 0)
+-#define _CMN_EVENT_HNF(_name, _event, _occup)			\
+-	CMN_EVENT_ATTR(hnf_##_name, CMN_TYPE_HNF, _event, _occup)
++	CMN_EVENT_ATTR(CMN_ANY, dtc_##_name, CMN_TYPE_DTC, 0, 0)
++#define _CMN_EVENT_HNF(_model, _name, _event, _occup)		\
++	CMN_EVENT_ATTR(_model, hnf_##_name, CMN_TYPE_HNF, _event, _occup)
+ #define CMN_EVENT_HNI(_name, _event)				\
+-	CMN_EVENT_ATTR(hni_##_name, CMN_TYPE_HNI, _event, 0)
++	CMN_EVENT_ATTR(CMN_ANY, hni_##_name, CMN_TYPE_HNI, _event, 0)
+ #define __CMN_EVENT_XP(_name, _event)				\
+-	CMN_EVENT_ATTR(mxp_##_name, CMN_TYPE_XP, _event, 0)
+-#define CMN_EVENT_SBSX(_name, _event)				\
+-	CMN_EVENT_ATTR(sbsx_##_name, CMN_TYPE_SBSX, _event, 0)
+-#define CMN_EVENT_RNID(_name, _event)				\
+-	CMN_EVENT_ATTR(rnid_##_name, CMN_TYPE_RNI, _event, 0)
+-
+-#define CMN_EVENT_DVM(_name, _event)				\
+-	_CMN_EVENT_DVM(_name, _event, 0)
+-#define CMN_EVENT_HNF(_name, _event)				\
+-	_CMN_EVENT_HNF(_name, _event, 0)
++	CMN_EVENT_ATTR(CMN_ANY, mxp_##_name, CMN_TYPE_XP, _event, 0)
++#define CMN_EVENT_SBSX(_model, _name, _event)			\
++	CMN_EVENT_ATTR(_model, sbsx_##_name, CMN_TYPE_SBSX, _event, 0)
++#define CMN_EVENT_RNID(_model, _name, _event)			\
++	CMN_EVENT_ATTR(_model, rnid_##_name, CMN_TYPE_RNI, _event, 0)
++#define CMN_EVENT_MTSX(_name, _event)				\
++	CMN_EVENT_ATTR(CMN_ANY, mtsx_##_name, CMN_TYPE_MTSX, _event, 0)
++
++#define CMN_EVENT_DVM(_model, _name, _event)			\
++	_CMN_EVENT_DVM(_model, _name, _event, 0)
++#define CMN_EVENT_HNF(_model, _name, _event)			\
++	_CMN_EVENT_HNF(_model, _name, _event, 0)
+ #define _CMN_EVENT_XP(_name, _event)				\
+ 	__CMN_EVENT_XP(e_##_name, (_event) | (0 << 2)),		\
+ 	__CMN_EVENT_XP(w_##_name, (_event) | (1 << 2)),		\
+@@ -445,115 +459,115 @@ static struct attribute *arm_cmn_event_attrs[] = {
+ 	 * slot, but our lazy short-cut of using the DTM counter index for
+ 	 * the PMU index as well happens to avoid that by construction.
+ 	 */
+-	CMN_EVENT_DVM(rxreq_dvmop,	0x01),
+-	CMN_EVENT_DVM(rxreq_dvmsync,	0x02),
+-	CMN_EVENT_DVM(rxreq_dvmop_vmid_filtered, 0x03),
+-	CMN_EVENT_DVM(rxreq_retried,	0x04),
+-	_CMN_EVENT_DVM(rxreq_trk_occupancy_all, 0x05, 0),
+-	_CMN_EVENT_DVM(rxreq_trk_occupancy_dvmop, 0x05, 1),
+-	_CMN_EVENT_DVM(rxreq_trk_occupancy_dvmsync, 0x05, 2),
+-
+-	CMN_EVENT_HNF(cache_miss,	0x01),
+-	CMN_EVENT_HNF(slc_sf_cache_access, 0x02),
+-	CMN_EVENT_HNF(cache_fill,	0x03),
+-	CMN_EVENT_HNF(pocq_retry,	0x04),
+-	CMN_EVENT_HNF(pocq_reqs_recvd,	0x05),
+-	CMN_EVENT_HNF(sf_hit,		0x06),
+-	CMN_EVENT_HNF(sf_evictions,	0x07),
+-	CMN_EVENT_HNF(dir_snoops_sent,	0x08),
+-	CMN_EVENT_HNF(brd_snoops_sent,	0x09),
+-	CMN_EVENT_HNF(slc_eviction,	0x0a),
+-	CMN_EVENT_HNF(slc_fill_invalid_way, 0x0b),
+-	CMN_EVENT_HNF(mc_retries,	0x0c),
+-	CMN_EVENT_HNF(mc_reqs,		0x0d),
+-	CMN_EVENT_HNF(qos_hh_retry,	0x0e),
+-	_CMN_EVENT_HNF(qos_pocq_occupancy_all, 0x0f, 0),
+-	_CMN_EVENT_HNF(qos_pocq_occupancy_read, 0x0f, 1),
+-	_CMN_EVENT_HNF(qos_pocq_occupancy_write, 0x0f, 2),
+-	_CMN_EVENT_HNF(qos_pocq_occupancy_atomic, 0x0f, 3),
+-	_CMN_EVENT_HNF(qos_pocq_occupancy_stash, 0x0f, 4),
+-	CMN_EVENT_HNF(pocq_addrhaz,	0x10),
+-	CMN_EVENT_HNF(pocq_atomic_addrhaz, 0x11),
+-	CMN_EVENT_HNF(ld_st_swp_adq_full, 0x12),
+-	CMN_EVENT_HNF(cmp_adq_full,	0x13),
+-	CMN_EVENT_HNF(txdat_stall,	0x14),
+-	CMN_EVENT_HNF(txrsp_stall,	0x15),
+-	CMN_EVENT_HNF(seq_full,		0x16),
+-	CMN_EVENT_HNF(seq_hit,		0x17),
+-	CMN_EVENT_HNF(snp_sent,		0x18),
+-	CMN_EVENT_HNF(sfbi_dir_snp_sent, 0x19),
+-	CMN_EVENT_HNF(sfbi_brd_snp_sent, 0x1a),
+-	CMN_EVENT_HNF(snp_sent_untrk,	0x1b),
+-	CMN_EVENT_HNF(intv_dirty,	0x1c),
+-	CMN_EVENT_HNF(stash_snp_sent,	0x1d),
+-	CMN_EVENT_HNF(stash_data_pull,	0x1e),
+-	CMN_EVENT_HNF(snp_fwded,	0x1f),
+-
+-	CMN_EVENT_HNI(rrt_rd_occ_cnt_ovfl, 0x20),
+-	CMN_EVENT_HNI(rrt_wr_occ_cnt_ovfl, 0x21),
+-	CMN_EVENT_HNI(rdt_rd_occ_cnt_ovfl, 0x22),
+-	CMN_EVENT_HNI(rdt_wr_occ_cnt_ovfl, 0x23),
+-	CMN_EVENT_HNI(wdb_occ_cnt_ovfl,	0x24),
+-	CMN_EVENT_HNI(rrt_rd_alloc,	0x25),
+-	CMN_EVENT_HNI(rrt_wr_alloc,	0x26),
+-	CMN_EVENT_HNI(rdt_rd_alloc,	0x27),
+-	CMN_EVENT_HNI(rdt_wr_alloc,	0x28),
+-	CMN_EVENT_HNI(wdb_alloc,	0x29),
+-	CMN_EVENT_HNI(txrsp_retryack,	0x2a),
+-	CMN_EVENT_HNI(arvalid_no_arready, 0x2b),
+-	CMN_EVENT_HNI(arready_no_arvalid, 0x2c),
+-	CMN_EVENT_HNI(awvalid_no_awready, 0x2d),
+-	CMN_EVENT_HNI(awready_no_awvalid, 0x2e),
+-	CMN_EVENT_HNI(wvalid_no_wready,	0x2f),
+-	CMN_EVENT_HNI(txdat_stall,	0x30),
+-	CMN_EVENT_HNI(nonpcie_serialization, 0x31),
+-	CMN_EVENT_HNI(pcie_serialization, 0x32),
+-
+-	CMN_EVENT_XP(txflit_valid,	0x01),
+-	CMN_EVENT_XP(txflit_stall,	0x02),
+-	CMN_EVENT_XP(partial_dat_flit,	0x03),
++	CMN_EVENT_DVM(CMN600, rxreq_dvmop,		0x01),
++	CMN_EVENT_DVM(CMN600, rxreq_dvmsync,		0x02),
++	CMN_EVENT_DVM(CMN600, rxreq_dvmop_vmid_filtered, 0x03),
++	CMN_EVENT_DVM(CMN600, rxreq_retried,		0x04),
++	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_all, 0x05, 0),
++	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_dvmop, 0x05, 1),
++	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_dvmsync, 0x05, 2),
++
++	CMN_EVENT_HNF(CMN_ANY, cache_miss,		0x01),
++	CMN_EVENT_HNF(CMN_ANY, slc_sf_cache_access,	0x02),
++	CMN_EVENT_HNF(CMN_ANY, cache_fill,		0x03),
++	CMN_EVENT_HNF(CMN_ANY, pocq_retry,		0x04),
++	CMN_EVENT_HNF(CMN_ANY, pocq_reqs_recvd,		0x05),
++	CMN_EVENT_HNF(CMN_ANY, sf_hit,			0x06),
++	CMN_EVENT_HNF(CMN_ANY, sf_evictions,		0x07),
++	CMN_EVENT_HNF(CMN_ANY, dir_snoops_sent,		0x08),
++	CMN_EVENT_HNF(CMN_ANY, brd_snoops_sent,		0x09),
++	CMN_EVENT_HNF(CMN_ANY, slc_eviction,		0x0a),
++	CMN_EVENT_HNF(CMN_ANY, slc_fill_invalid_way,	0x0b),
++	CMN_EVENT_HNF(CMN_ANY, mc_retries,		0x0c),
++	CMN_EVENT_HNF(CMN_ANY, mc_reqs,			0x0d),
++	CMN_EVENT_HNF(CMN_ANY, qos_hh_retry,		0x0e),
++	_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_all,	0x0f, 0),
++	_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_read, 0x0f, 1),
++	_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_write, 0x0f, 2),
++	_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_atomic, 0x0f, 3),
++	_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_stash, 0x0f, 4),
++	CMN_EVENT_HNF(CMN_ANY, pocq_addrhaz,		0x10),
++	CMN_EVENT_HNF(CMN_ANY, pocq_atomic_addrhaz,	0x11),
++	CMN_EVENT_HNF(CMN_ANY, ld_st_swp_adq_full,	0x12),
++	CMN_EVENT_HNF(CMN_ANY, cmp_adq_full,		0x13),
++	CMN_EVENT_HNF(CMN_ANY, txdat_stall,		0x14),
++	CMN_EVENT_HNF(CMN_ANY, txrsp_stall,		0x15),
++	CMN_EVENT_HNF(CMN_ANY, seq_full,		0x16),
++	CMN_EVENT_HNF(CMN_ANY, seq_hit,			0x17),
++	CMN_EVENT_HNF(CMN_ANY, snp_sent,		0x18),
++	CMN_EVENT_HNF(CMN_ANY, sfbi_dir_snp_sent,	0x19),
++	CMN_EVENT_HNF(CMN_ANY, sfbi_brd_snp_sent,	0x1a),
++	CMN_EVENT_HNF(CMN_ANY, snp_sent_untrk,		0x1b),
++	CMN_EVENT_HNF(CMN_ANY, intv_dirty,		0x1c),
++	CMN_EVENT_HNF(CMN_ANY, stash_snp_sent,		0x1d),
++	CMN_EVENT_HNF(CMN_ANY, stash_data_pull,		0x1e),
++	CMN_EVENT_HNF(CMN_ANY, snp_fwded,		0x1f),
++
++	CMN_EVENT_HNI(rrt_rd_occ_cnt_ovfl,		0x20),
++	CMN_EVENT_HNI(rrt_wr_occ_cnt_ovfl,		0x21),
++	CMN_EVENT_HNI(rdt_rd_occ_cnt_ovfl,		0x22),
++	CMN_EVENT_HNI(rdt_wr_occ_cnt_ovfl,		0x23),
++	CMN_EVENT_HNI(wdb_occ_cnt_ovfl,			0x24),
++	CMN_EVENT_HNI(rrt_rd_alloc,			0x25),
++	CMN_EVENT_HNI(rrt_wr_alloc,			0x26),
++	CMN_EVENT_HNI(rdt_rd_alloc,			0x27),
++	CMN_EVENT_HNI(rdt_wr_alloc,			0x28),
++	CMN_EVENT_HNI(wdb_alloc,			0x29),
++	CMN_EVENT_HNI(txrsp_retryack,			0x2a),
++	CMN_EVENT_HNI(arvalid_no_arready,		0x2b),
++	CMN_EVENT_HNI(arready_no_arvalid,		0x2c),
++	CMN_EVENT_HNI(awvalid_no_awready,		0x2d),
++	CMN_EVENT_HNI(awready_no_awvalid,		0x2e),
++	CMN_EVENT_HNI(wvalid_no_wready,			0x2f),
++	CMN_EVENT_HNI(txdat_stall,			0x30),
++	CMN_EVENT_HNI(nonpcie_serialization,		0x31),
++	CMN_EVENT_HNI(pcie_serialization,		0x32),
++
++	CMN_EVENT_XP(txflit_valid,			0x01),
++	CMN_EVENT_XP(txflit_stall,			0x02),
++	CMN_EVENT_XP(partial_dat_flit,			0x03),
+ 	/* We treat watchpoints as a special made-up class of XP events */
+-	CMN_EVENT_ATTR(watchpoint_up, CMN_TYPE_WP, 0, 0),
+-	CMN_EVENT_ATTR(watchpoint_down, CMN_TYPE_WP, 2, 0),
+-
+-	CMN_EVENT_SBSX(rd_req,		0x01),
+-	CMN_EVENT_SBSX(wr_req,		0x02),
+-	CMN_EVENT_SBSX(cmo_req,		0x03),
+-	CMN_EVENT_SBSX(txrsp_retryack,	0x04),
+-	CMN_EVENT_SBSX(txdat_flitv,	0x05),
+-	CMN_EVENT_SBSX(txrsp_flitv,	0x06),
+-	CMN_EVENT_SBSX(rd_req_trkr_occ_cnt_ovfl, 0x11),
+-	CMN_EVENT_SBSX(wr_req_trkr_occ_cnt_ovfl, 0x12),
+-	CMN_EVENT_SBSX(cmo_req_trkr_occ_cnt_ovfl, 0x13),
+-	CMN_EVENT_SBSX(wdb_occ_cnt_ovfl, 0x14),
+-	CMN_EVENT_SBSX(rd_axi_trkr_occ_cnt_ovfl, 0x15),
+-	CMN_EVENT_SBSX(cmo_axi_trkr_occ_cnt_ovfl, 0x16),
+-	CMN_EVENT_SBSX(arvalid_no_arready, 0x21),
+-	CMN_EVENT_SBSX(awvalid_no_awready, 0x22),
+-	CMN_EVENT_SBSX(wvalid_no_wready, 0x23),
+-	CMN_EVENT_SBSX(txdat_stall,	0x24),
+-	CMN_EVENT_SBSX(txrsp_stall,	0x25),
+-
+-	CMN_EVENT_RNID(s0_rdata_beats,	0x01),
+-	CMN_EVENT_RNID(s1_rdata_beats,	0x02),
+-	CMN_EVENT_RNID(s2_rdata_beats,	0x03),
+-	CMN_EVENT_RNID(rxdat_flits,	0x04),
+-	CMN_EVENT_RNID(txdat_flits,	0x05),
+-	CMN_EVENT_RNID(txreq_flits_total, 0x06),
+-	CMN_EVENT_RNID(txreq_flits_retried, 0x07),
+-	CMN_EVENT_RNID(rrt_occ_ovfl,	0x08),
+-	CMN_EVENT_RNID(wrt_occ_ovfl,	0x09),
+-	CMN_EVENT_RNID(txreq_flits_replayed, 0x0a),
+-	CMN_EVENT_RNID(wrcancel_sent,	0x0b),
+-	CMN_EVENT_RNID(s0_wdata_beats,	0x0c),
+-	CMN_EVENT_RNID(s1_wdata_beats,	0x0d),
+-	CMN_EVENT_RNID(s2_wdata_beats,	0x0e),
+-	CMN_EVENT_RNID(rrt_alloc,	0x0f),
+-	CMN_EVENT_RNID(wrt_alloc,	0x10),
+-	CMN_EVENT_RNID(rdb_unord,	0x11),
+-	CMN_EVENT_RNID(rdb_replay,	0x12),
+-	CMN_EVENT_RNID(rdb_hybrid,	0x13),
+-	CMN_EVENT_RNID(rdb_ord,		0x14),
++	CMN_EVENT_ATTR(CMN_ANY, watchpoint_up, CMN_TYPE_WP, CMN_WP_UP, 0),
++	CMN_EVENT_ATTR(CMN_ANY, watchpoint_down, CMN_TYPE_WP, CMN_WP_DOWN, 0),
++
++	CMN_EVENT_SBSX(CMN_ANY, rd_req,			0x01),
++	CMN_EVENT_SBSX(CMN_ANY, wr_req,			0x02),
++	CMN_EVENT_SBSX(CMN_ANY, cmo_req,		0x03),
++	CMN_EVENT_SBSX(CMN_ANY, txrsp_retryack,		0x04),
++	CMN_EVENT_SBSX(CMN_ANY, txdat_flitv,		0x05),
++	CMN_EVENT_SBSX(CMN_ANY, txrsp_flitv,		0x06),
++	CMN_EVENT_SBSX(CMN_ANY, rd_req_trkr_occ_cnt_ovfl, 0x11),
++	CMN_EVENT_SBSX(CMN_ANY, wr_req_trkr_occ_cnt_ovfl, 0x12),
++	CMN_EVENT_SBSX(CMN_ANY, cmo_req_trkr_occ_cnt_ovfl, 0x13),
++	CMN_EVENT_SBSX(CMN_ANY, wdb_occ_cnt_ovfl,	0x14),
++	CMN_EVENT_SBSX(CMN_ANY, rd_axi_trkr_occ_cnt_ovfl, 0x15),
++	CMN_EVENT_SBSX(CMN_ANY, cmo_axi_trkr_occ_cnt_ovfl, 0x16),
++	CMN_EVENT_SBSX(CMN_ANY, arvalid_no_arready,	0x21),
++	CMN_EVENT_SBSX(CMN_ANY, awvalid_no_awready,	0x22),
++	CMN_EVENT_SBSX(CMN_ANY, wvalid_no_wready,	0x23),
++	CMN_EVENT_SBSX(CMN_ANY, txdat_stall,		0x24),
++	CMN_EVENT_SBSX(CMN_ANY, txrsp_stall,		0x25),
++
++	CMN_EVENT_RNID(CMN_ANY, s0_rdata_beats,		0x01),
++	CMN_EVENT_RNID(CMN_ANY, s1_rdata_beats,		0x02),
++	CMN_EVENT_RNID(CMN_ANY, s2_rdata_beats,		0x03),
++	CMN_EVENT_RNID(CMN_ANY, rxdat_flits,		0x04),
++	CMN_EVENT_RNID(CMN_ANY, txdat_flits,		0x05),
++	CMN_EVENT_RNID(CMN_ANY, txreq_flits_total,	0x06),
++	CMN_EVENT_RNID(CMN_ANY, txreq_flits_retried,	0x07),
++	CMN_EVENT_RNID(CMN_ANY, rrt_occ_ovfl,		0x08),
++	CMN_EVENT_RNID(CMN_ANY, wrt_occ_ovfl,		0x09),
++	CMN_EVENT_RNID(CMN_ANY, txreq_flits_replayed,	0x0a),
++	CMN_EVENT_RNID(CMN_ANY, wrcancel_sent,		0x0b),
++	CMN_EVENT_RNID(CMN_ANY, s0_wdata_beats,		0x0c),
++	CMN_EVENT_RNID(CMN_ANY, s1_wdata_beats,		0x0d),
++	CMN_EVENT_RNID(CMN_ANY, s2_wdata_beats,		0x0e),
++	CMN_EVENT_RNID(CMN_ANY, rrt_alloc,		0x0f),
++	CMN_EVENT_RNID(CMN_ANY, wrt_alloc,		0x10),
++	CMN_EVENT_RNID(CMN600, rdb_unord,		0x11),
++	CMN_EVENT_RNID(CMN600, rdb_replay,		0x12),
++	CMN_EVENT_RNID(CMN600, rdb_hybrid,		0x13),
++	CMN_EVENT_RNID(CMN600, rdb_ord,			0x14),
+ 
+ 	NULL
+ };
+@@ -1386,15 +1400,14 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	int i, j;
+ 	size_t sz;
+ 
+-	cfg_region = cmn->base + rgn_offset;
+-	reg = readl_relaxed(cfg_region + CMN_CFGM_PERIPH_ID_2);
+-	cmn->rev = FIELD_GET(CMN_CFGM_PID2_REVISION, reg);
+-	dev_dbg(cmn->dev, "periph_id_2 revision: %d\n", cmn->rev);
+-
+ 	arm_cmn_init_node_info(cmn, rgn_offset, &cfg);
+ 	if (cfg.type != CMN_TYPE_CFG)
+ 		return -ENODEV;
+ 
++	cfg_region = cmn->base + rgn_offset;
++	reg = readl_relaxed(cfg_region + CMN_CFGM_PERIPH_ID_2);
++	cmn->rev = FIELD_GET(CMN_CFGM_PID2_REVISION, reg);
++
+ 	reg = readq_relaxed(cfg_region + CMN_CHILD_INFO);
+ 	child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
+ 	child_poff = FIELD_GET(CMN_CI_CHILD_PTR_OFFSET, reg);
+@@ -1507,13 +1520,14 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		cmn->mesh_x = cmn->num_xps;
+ 	cmn->mesh_y = cmn->num_xps / cmn->mesh_x;
+ 
++	dev_dbg(cmn->dev, "model %d, periph_id_2 revision %d\n", cmn->model, cmn->rev);
+ 	dev_dbg(cmn->dev, "mesh %dx%d, ID width %d\n",
+ 		cmn->mesh_x, cmn->mesh_y, arm_cmn_xyidbits(cmn));
+ 
+ 	return 0;
+ }
+ 
+-static int arm_cmn_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn)
++static int arm_cmn600_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn)
+ {
+ 	struct resource *cfg, *root;
+ 
+@@ -1540,21 +1554,11 @@ static int arm_cmn_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn)
+ 	return root->start - cfg->start;
+ }
+ 
+-static int arm_cmn_of_probe(struct platform_device *pdev, struct arm_cmn *cmn)
++static int arm_cmn600_of_probe(struct device_node *np)
+ {
+-	struct device_node *np = pdev->dev.of_node;
+ 	u32 rootnode;
+-	int ret;
+ 
+-	cmn->base = devm_platform_ioremap_resource(pdev, 0);
+-	if (IS_ERR(cmn->base))
+-		return PTR_ERR(cmn->base);
+-
+-	ret = of_property_read_u32(np, "arm,root-node", &rootnode);
+-	if (ret)
+-		return ret;
+-
+-	return rootnode;
++	return of_property_read_u32(np, "arm,root-node", &rootnode) ?: rootnode;
+ }
+ 
+ static int arm_cmn_probe(struct platform_device *pdev)
+@@ -1569,12 +1573,19 @@ static int arm_cmn_probe(struct platform_device *pdev)
+ 		return -ENOMEM;
+ 
+ 	cmn->dev = &pdev->dev;
++	cmn->model = (unsigned long)device_get_match_data(cmn->dev);
+ 	platform_set_drvdata(pdev, cmn);
+ 
+-	if (has_acpi_companion(cmn->dev))
+-		rootnode = arm_cmn_acpi_probe(pdev, cmn);
+-	else
+-		rootnode = arm_cmn_of_probe(pdev, cmn);
++	if (cmn->model == CMN600 && has_acpi_companion(cmn->dev)) {
++		rootnode = arm_cmn600_acpi_probe(pdev, cmn);
++	} else {
++		rootnode = 0;
++		cmn->base = devm_platform_ioremap_resource(pdev, 0);
++		if (IS_ERR(cmn->base))
++			return PTR_ERR(cmn->base);
++		if (cmn->model == CMN600)
++			rootnode = arm_cmn600_of_probe(pdev->dev.of_node);
++	}
+ 	if (rootnode < 0)
+ 		return rootnode;
+ 
+@@ -1637,7 +1648,7 @@ static int arm_cmn_remove(struct platform_device *pdev)
+ 
+ #ifdef CONFIG_OF
+ static const struct of_device_id arm_cmn_of_match[] = {
+-	{ .compatible = "arm,cmn-600", },
++	{ .compatible = "arm,cmn-600", .data = (void *)CMN600 },
+ 	{}
+ };
+ MODULE_DEVICE_TABLE(of, arm_cmn_of_match);
+@@ -1645,7 +1656,7 @@ MODULE_DEVICE_TABLE(of, arm_cmn_of_match);
+ 
+ #ifdef CONFIG_ACPI
+ static const struct acpi_device_id arm_cmn_acpi_match[] = {
+-	{ "ARMHC600", },
++	{ "ARMHC600", CMN600 },
+ 	{}
+ };
+ MODULE_DEVICE_TABLE(acpi, arm_cmn_acpi_match);
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0029-perf-arm-cmn-Support-new-IP-features.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0029-perf-arm-cmn-Support-new-IP-features.patch
new file mode 100644
index 0000000..fa0c5d9
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0029-perf-arm-cmn-Support-new-IP-features.patch
@@ -0,0 +1,549 @@
+From a10c446ba1f7516c16dd6400c9a7f5e203779a5d Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:45:00 +0000
+Subject: [PATCH 13/14] perf/arm-cmn: Support new IP features
+
+The second generation of CMN IPs add new node types and significantly
+expand the configuration space with options for extra device ports on
+edge XPs, either plumbed into the regular DTM or with extra dedicated
+DTMs to monitor them, plus larger (and smaller) mesh sizes. Add basic
+support for pulling this new information out of the hardware, piping
+it around as necessary, and handling (most of) the new choices.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/e58b495bcc7deec3882be4bac910ed0bf6979674.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 222 ++++++++++++++++++++++++++++++++---------
+ 1 file changed, 173 insertions(+), 49 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 92ff273fbe58..871c86687379 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -24,7 +24,10 @@
+ #define CMN_NI_LOGICAL_ID		GENMASK_ULL(47, 32)
+ 
+ #define CMN_NODEID_DEVID(reg)		((reg) & 3)
++#define CMN_NODEID_EXT_DEVID(reg)	((reg) & 1)
+ #define CMN_NODEID_PID(reg)		(((reg) >> 2) & 1)
++#define CMN_NODEID_EXT_PID(reg)		(((reg) >> 1) & 3)
++#define CMN_NODEID_1x1_PID(reg)		(((reg) >> 2) & 7)
+ #define CMN_NODEID_X(reg, bits)		((reg) >> (3 + (bits)))
+ #define CMN_NODEID_Y(reg, bits)		(((reg) >> 3) & ((1U << (bits)) - 1))
+ 
+@@ -37,13 +40,26 @@
+ 
+ #define CMN_MAX_DIMENSION		8
+ #define CMN_MAX_XPS			(CMN_MAX_DIMENSION * CMN_MAX_DIMENSION)
+-#define CMN_MAX_DTMS			CMN_MAX_XPS
++#define CMN_MAX_DTMS			(CMN_MAX_XPS + (CMN_MAX_DIMENSION - 1) * 4)
+ 
+-/* The CFG node has one other useful purpose */
++/* The CFG node has various info besides the discovery tree */
+ #define CMN_CFGM_PERIPH_ID_2		0x0010
+ #define CMN_CFGM_PID2_REVISION		GENMASK(7, 4)
+ 
+-/* PMU registers occupy the 3rd 4KB page of each node's 16KB space */
++#define CMN_CFGM_INFO_GLOBAL		0x900
++#define CMN_INFO_MULTIPLE_DTM_EN	BIT_ULL(63)
++#define CMN_INFO_RSP_VC_NUM		GENMASK_ULL(53, 52)
++#define CMN_INFO_DAT_VC_NUM		GENMASK_ULL(51, 50)
++
++/* XPs also have some local topology info which has uses too */
++#define CMN_MXP__CONNECT_INFO_P0	0x0008
++#define CMN_MXP__CONNECT_INFO_P1	0x0010
++#define CMN_MXP__CONNECT_INFO_P2	0x0028
++#define CMN_MXP__CONNECT_INFO_P3	0x0030
++#define CMN_MXP__CONNECT_INFO_P4	0x0038
++#define CMN_MXP__CONNECT_INFO_P5	0x0040
++
++/* PMU registers occupy the 3rd 4KB page of each node's region */
+ #define CMN_PMU_OFFSET			0x2000
+ 
+ /* For most nodes, this is all there is */
+@@ -53,6 +69,7 @@
+ /* DTMs live in the PMU space of XP registers */
+ #define CMN_DTM_WPn(n)			(0x1A0 + (n) * 0x18)
+ #define CMN_DTM_WPn_CONFIG(n)		(CMN_DTM_WPn(n) + 0x00)
++#define CMN_DTM_WPn_CONFIG_WP_DEV_SEL2	GENMASK_ULL(18,17)
+ #define CMN_DTM_WPn_CONFIG_WP_COMBINE	BIT(6)
+ #define CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE	BIT(5)
+ #define CMN_DTM_WPn_CONFIG_WP_GRP	BIT(4)
+@@ -77,7 +94,11 @@
+ 
+ #define CMN_DTM_PMEVCNTSR		0x240
+ 
++#define CMN_DTM_UNIT_INFO		0x0910
++
+ #define CMN_DTM_NUM_COUNTERS		4
++/* Want more local counters? Why not replicate the whole DTM! Ugh... */
++#define CMN_DTM_OFFSET(n)		((n) * 0x200)
+ 
+ /* The DTC node is where the magic happens */
+ #define CMN_DT_DTC_CTL			0x0a00
+@@ -131,10 +152,10 @@
+ #define CMN_EVENT_NODEID(event)		FIELD_GET(CMN_CONFIG_NODEID, (event)->attr.config)
+ 
+ #define CMN_CONFIG_WP_COMBINE		GENMASK_ULL(27, 24)
+-#define CMN_CONFIG_WP_DEV_SEL		BIT_ULL(48)
+-#define CMN_CONFIG_WP_CHN_SEL		GENMASK_ULL(50, 49)
+-#define CMN_CONFIG_WP_GRP		BIT_ULL(52)
+-#define CMN_CONFIG_WP_EXCLUSIVE		BIT_ULL(53)
++#define CMN_CONFIG_WP_DEV_SEL		GENMASK_ULL(50, 48)
++#define CMN_CONFIG_WP_CHN_SEL		GENMASK_ULL(55, 51)
++#define CMN_CONFIG_WP_GRP		BIT_ULL(56)
++#define CMN_CONFIG_WP_EXCLUSIVE		BIT_ULL(57)
+ #define CMN_CONFIG1_WP_VAL		GENMASK_ULL(63, 0)
+ #define CMN_CONFIG2_WP_MASK		GENMASK_ULL(63, 0)
+ 
+@@ -176,9 +197,12 @@ enum cmn_node_type {
+ 	CMN_TYPE_HNF,
+ 	CMN_TYPE_XP,
+ 	CMN_TYPE_SBSX,
+-	CMN_TYPE_RNI = 0xa,
++	CMN_TYPE_MPAM_S,
++	CMN_TYPE_MPAM_NS,
++	CMN_TYPE_RNI,
+ 	CMN_TYPE_RND = 0xd,
+ 	CMN_TYPE_RNSAM = 0xf,
++	CMN_TYPE_MTSX,
+ 	CMN_TYPE_CXRA = 0x100,
+ 	CMN_TYPE_CXHA = 0x101,
+ 	CMN_TYPE_CXLA = 0x102,
+@@ -233,6 +257,7 @@ struct arm_cmn_dtc {
+ struct arm_cmn {
+ 	struct device *dev;
+ 	void __iomem *base;
++	unsigned int state;
+ 
+ 	enum cmn_revision rev;
+ 	enum cmn_model model;
+@@ -240,6 +265,13 @@ struct arm_cmn {
+ 	u8 mesh_y;
+ 	u16 num_xps;
+ 	u16 num_dns;
++	bool multi_dtm;
++	u8 ports_used;
++	struct {
++		unsigned int rsp_vc_num : 2;
++		unsigned int dat_vc_num : 2;
++	};
++
+ 	struct arm_cmn_node *xps;
+ 	struct arm_cmn_node *dns;
+ 
+@@ -250,7 +282,6 @@ struct arm_cmn {
+ 	int cpu;
+ 	struct hlist_node cpuhp_node;
+ 
+-	unsigned int state;
+ 	struct pmu pmu;
+ };
+ 
+@@ -275,13 +306,25 @@ static int arm_cmn_xyidbits(const struct arm_cmn *cmn)
+ static struct arm_cmn_nodeid arm_cmn_nid(const struct arm_cmn *cmn, u16 id)
+ {
+ 	struct arm_cmn_nodeid nid;
+-	int bits = arm_cmn_xyidbits(cmn);
+ 
+-	nid.x = CMN_NODEID_X(id, bits);
+-	nid.y = CMN_NODEID_Y(id, bits);
+-	nid.port = CMN_NODEID_PID(id);
+-	nid.dev = CMN_NODEID_DEVID(id);
++	if (cmn->num_xps == 1) {
++		nid.x = 0;
++		nid.y = 0;
++		nid.port = CMN_NODEID_1x1_PID(id);
++		nid.dev = CMN_NODEID_DEVID(id);
++	} else {
++		int bits = arm_cmn_xyidbits(cmn);
+ 
++		nid.x = CMN_NODEID_X(id, bits);
++		nid.y = CMN_NODEID_Y(id, bits);
++		if (cmn->ports_used & 0xc) {
++			nid.port = CMN_NODEID_EXT_PID(id);
++			nid.dev = CMN_NODEID_EXT_DEVID(id);
++		} else {
++			nid.port = CMN_NODEID_PID(id);
++			nid.dev = CMN_NODEID_DEVID(id);
++		}
++	}
+ 	return nid;
+ }
+ 
+@@ -310,6 +353,7 @@ struct arm_cmn_hw_event {
+ 	unsigned int dtc_idx;
+ 	u8 dtcs_used;
+ 	u8 num_dns;
++	u8 dtm_offset;
+ };
+ 
+ #define for_each_hw_dn(hw, dn, i) \
+@@ -354,7 +398,8 @@ struct arm_cmn_format_attr {
+ 		.occupid = _occupid,					\
+ 	}})[0].attr.attr)
+ 
+-static bool arm_cmn_is_occup_event(enum cmn_node_type type, unsigned int id)
++static bool arm_cmn_is_occup_event(enum cmn_model model,
++				   enum cmn_node_type type, unsigned int id)
+ {
+ 	return (type == CMN_TYPE_DVM && id == 0x05) ||
+ 	       (type == CMN_TYPE_HNF && id == 0x0f);
+@@ -375,9 +420,9 @@ static ssize_t arm_cmn_event_show(struct device *dev,
+ 				"type=0x%x,eventid=0x%x,wp_dev_sel=?,wp_chn_sel=?,wp_grp=?,wp_val=?,wp_mask=?\n",
+ 				eattr->type, eattr->eventid);
+ 
+-	if (arm_cmn_is_occup_event(eattr->type, eattr->eventid))
+-		return snprintf(buf, PAGE_SIZE, "type=0x%x,eventid=0x%x,occupid=0x%x\n",
+-				eattr->type, eattr->eventid, eattr->occupid);
++	if (arm_cmn_is_occup_event(eattr->model, eattr->type, eattr->eventid))
++		return sysfs_emit(buf, "type=0x%x,eventid=0x%x,occupid=0x%x\n",
++				  eattr->type, eattr->eventid, eattr->occupid);
+ 
+ 	return snprintf(buf, PAGE_SIZE, "type=0x%x,eventid=0x%x\n",
+ 			eattr->type, eattr->eventid);
+@@ -390,25 +435,36 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
+ 	struct device *dev = kobj_to_dev(kobj);
+ 	struct arm_cmn *cmn = to_cmn(dev_get_drvdata(dev));
+ 	struct arm_cmn_event_attr *eattr;
+-	enum cmn_node_type type;
+ 
+ 	eattr = container_of(attr, typeof(*eattr), attr.attr);
+-	type = eattr->type;
+ 
+ 	if (!(eattr->model & cmn->model))
+ 		return 0;
+ 
+-	/* Watchpoints aren't nodes */
+-	if (type == CMN_TYPE_WP)
+-		type = CMN_TYPE_XP;
++	/* Watchpoints aren't nodes, so avoid confusion */
++	if (eattr->type == CMN_TYPE_WP)
++		return attr->mode;
++
++	/* Hide XP events for unused interfaces/channels */
++	if (eattr->type == CMN_TYPE_XP) {
++		unsigned int intf = (eattr->eventid >> 2) & 7;
++		unsigned int chan = eattr->eventid >> 5;
++
++		if ((intf & 4) && !(cmn->ports_used & BIT(intf & 3)))
++			return 0;
++
++		if ((chan == 5 && cmn->rsp_vc_num < 2) ||
++		    (chan == 6 && cmn->dat_vc_num < 2))
++			return 0;
++	}
+ 
+ 	/* Revision-specific differences */
+ 	if (cmn->model == CMN600 && cmn->rev < CMN600_R1P2) {
+-		if (type == CMN_TYPE_HNF && eattr->eventid == 0x1b)
++		if (eattr->type == CMN_TYPE_HNF && eattr->eventid == 0x1b)
+ 			return 0;
+ 	}
+ 
+-	if (!arm_cmn_node(cmn, type))
++	if (!arm_cmn_node(cmn, eattr->type))
+ 		return 0;
+ 
+ 	return attr->mode;
+@@ -669,7 +725,8 @@ static u32 arm_cmn_wp_config(struct perf_event *event)
+ 	config = FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_DEV_SEL, dev) |
+ 		 FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_CHN_SEL, chn) |
+ 		 FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_GRP, grp) |
+-		 FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE, exc);
++		 FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE, exc) |
++		 FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_DEV_SEL2, dev >> 1);
+ 	if (combine && !grp)
+ 		config |= CMN_DTM_WPn_CONFIG_WP_COMBINE;
+ 
+@@ -712,7 +769,7 @@ static u64 arm_cmn_read_dtm(struct arm_cmn *cmn, struct arm_cmn_hw_event *hw,
+ 	offset = snapshot ? CMN_DTM_PMEVCNTSR : CMN_DTM_PMEVCNT;
+ 	for_each_hw_dn(hw, dn, i) {
+ 		if (dtm != &cmn->dtms[dn->dtm]) {
+-			dtm = &cmn->dtms[dn->dtm];
++			dtm = &cmn->dtms[dn->dtm] + hw->dtm_offset;
+ 			reg = readq_relaxed(dtm->base + offset);
+ 		}
+ 		dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+@@ -800,8 +857,10 @@ static void arm_cmn_event_start(struct perf_event *event, int flags)
+ 		u64 mask = CMN_EVENT_WP_MASK(event);
+ 
+ 		for_each_hw_dn(hw, dn, i) {
+-			writeq_relaxed(val, dn->pmu_base + CMN_DTM_WPn_VAL(wp_idx));
+-			writeq_relaxed(mask, dn->pmu_base + CMN_DTM_WPn_MASK(wp_idx));
++			void __iomem *base = dn->pmu_base + CMN_DTM_OFFSET(hw->dtm_offset);
++
++			writeq_relaxed(val, base + CMN_DTM_WPn_VAL(wp_idx));
++			writeq_relaxed(mask, base + CMN_DTM_WPn_MASK(wp_idx));
+ 		}
+ 	} else for_each_hw_dn(hw, dn, i) {
+ 		int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+@@ -826,8 +885,10 @@ static void arm_cmn_event_stop(struct perf_event *event, int flags)
+ 		int wp_idx = arm_cmn_wp_idx(event);
+ 
+ 		for_each_hw_dn(hw, dn, i) {
+-			writeq_relaxed(0, dn->pmu_base + CMN_DTM_WPn_MASK(wp_idx));
+-			writeq_relaxed(~0ULL, dn->pmu_base + CMN_DTM_WPn_VAL(wp_idx));
++			void __iomem *base = dn->pmu_base + CMN_DTM_OFFSET(hw->dtm_offset);
++
++			writeq_relaxed(0, base + CMN_DTM_WPn_MASK(wp_idx));
++			writeq_relaxed(~0ULL, base + CMN_DTM_WPn_VAL(wp_idx));
+ 		}
+ 	} else for_each_hw_dn(hw, dn, i) {
+ 		int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+@@ -847,7 +908,8 @@ struct arm_cmn_val {
+ 	bool cycles;
+ };
+ 
+-static void arm_cmn_val_add_event(struct arm_cmn_val *val, struct perf_event *event)
++static void arm_cmn_val_add_event(struct arm_cmn *cmn, struct arm_cmn_val *val,
++				  struct perf_event *event)
+ {
+ 	struct arm_cmn_hw_event *hw = to_cmn_hw(event);
+ 	struct arm_cmn_node *dn;
+@@ -865,7 +927,7 @@ static void arm_cmn_val_add_event(struct arm_cmn_val *val, struct perf_event *ev
+ 	}
+ 
+ 	val->dtc_count++;
+-	if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event)))
++	if (arm_cmn_is_occup_event(cmn->model, type, CMN_EVENT_EVENTID(event)))
+ 		occupid = CMN_EVENT_OCCUPID(event) + 1;
+ 	else
+ 		occupid = 0;
+@@ -884,7 +946,7 @@ static void arm_cmn_val_add_event(struct arm_cmn_val *val, struct perf_event *ev
+ 	}
+ }
+ 
+-static int arm_cmn_validate_group(struct perf_event *event)
++static int arm_cmn_validate_group(struct arm_cmn *cmn, struct perf_event *event)
+ {
+ 	struct arm_cmn_hw_event *hw = to_cmn_hw(event);
+ 	struct arm_cmn_node *dn;
+@@ -904,9 +966,9 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 	if (!val)
+ 		return -ENOMEM;
+ 
+-	arm_cmn_val_add_event(val, leader);
++	arm_cmn_val_add_event(cmn, val, leader);
+ 	for_each_sibling_event(sibling, leader)
+-		arm_cmn_val_add_event(val, sibling);
++		arm_cmn_val_add_event(cmn, val, sibling);
+ 
+ 	type = CMN_EVENT_TYPE(event);
+ 	if (type == CMN_TYPE_DTC) {
+@@ -917,7 +979,7 @@ static int arm_cmn_validate_group(struct perf_event *event)
+ 	if (val->dtc_count == CMN_DT_NUM_COUNTERS)
+ 		goto done;
+ 
+-	if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event)))
++	if (arm_cmn_is_occup_event(cmn->model, type, CMN_EVENT_EVENTID(event)))
+ 		occupid = CMN_EVENT_OCCUPID(event) + 1;
+ 	else
+ 		occupid = 0;
+@@ -980,6 +1042,9 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 		eventid = CMN_EVENT_EVENTID(event);
+ 		if (eventid != CMN_WP_UP && eventid != CMN_WP_DOWN)
+ 			return -EINVAL;
++		/* ...but the DTM may depend on which port we're watching */
++		if (cmn->multi_dtm)
++			hw->dtm_offset = CMN_EVENT_WP_DEV_SEL(event) / 2;
+ 	}
+ 
+ 	bynodeid = CMN_EVENT_BYNODEID(event);
+@@ -1007,7 +1072,7 @@ static int arm_cmn_event_init(struct perf_event *event)
+ 		return -EINVAL;
+ 	}
+ 
+-	return arm_cmn_validate_group(event);
++	return arm_cmn_validate_group(cmn, event);
+ }
+ 
+ static void arm_cmn_event_clear(struct arm_cmn *cmn, struct perf_event *event,
+@@ -1017,13 +1082,13 @@ static void arm_cmn_event_clear(struct arm_cmn *cmn, struct perf_event *event,
+ 	enum cmn_node_type type = CMN_EVENT_TYPE(event);
+ 
+ 	while (i--) {
+-		struct arm_cmn_dtm *dtm = &cmn->dtms[hw->dn[i].dtm];
++		struct arm_cmn_dtm *dtm = &cmn->dtms[hw->dn[i].dtm] + hw->dtm_offset;
+ 		unsigned int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
+ 
+ 		if (type == CMN_TYPE_WP)
+ 			dtm->wp_event[arm_cmn_wp_idx(event)] = -1;
+ 
+-		if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event)))
++		if (arm_cmn_is_occup_event(cmn->model, type, CMN_EVENT_EVENTID(event)))
+ 			hw->dn[i].occupid_count--;
+ 
+ 		dtm->pmu_config_low &= ~CMN__PMEVCNT_PAIRED(dtm_idx);
+@@ -1069,7 +1134,7 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 
+ 	/* ...then the local counters to feed it. */
+ 	for_each_hw_dn(hw, dn, i) {
+-		struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm];
++		struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm] + hw->dtm_offset;
+ 		unsigned int dtm_idx, shift;
+ 		u64 reg;
+ 
+@@ -1098,10 +1163,13 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
+ 		} else {
+ 			struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
+ 
++			if (cmn->multi_dtm)
++				nid.port %= 2;
++
+ 			input_sel = CMN__PMEVCNT0_INPUT_SEL_DEV + dtm_idx +
+ 				    (nid.port << 4) + (nid.dev << 2);
+ 
+-			if (arm_cmn_is_occup_event(type, CMN_EVENT_EVENTID(event))) {
++			if (arm_cmn_is_occup_event(cmn->model, type, CMN_EVENT_EVENTID(event))) {
+ 				u8 occupid = CMN_EVENT_OCCUPID(event);
+ 
+ 				if (dn->occupid_count == 0) {
+@@ -1283,11 +1351,11 @@ static int arm_cmn_init_irqs(struct arm_cmn *cmn)
+ 	return 0;
+ }
+ 
+-static void arm_cmn_init_dtm(struct arm_cmn_dtm *dtm, struct arm_cmn_node *xp)
++static void arm_cmn_init_dtm(struct arm_cmn_dtm *dtm, struct arm_cmn_node *xp, int idx)
+ {
+ 	int i;
+ 
+-	dtm->base = xp->pmu_base;
++	dtm->base = xp->pmu_base + CMN_DTM_OFFSET(idx);
+ 	dtm->pmu_config_low = CMN_DTM_PMU_CONFIG_PMU_EN;
+ 	for (i = 0; i < 4; i++) {
+ 		dtm->wp_event[i] = -1;
+@@ -1345,6 +1413,8 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
+ 
+ 		xp = arm_cmn_node_to_xp(cmn, dn);
+ 		dn->dtm = xp->dtm;
++		if (cmn->multi_dtm)
++			dn->dtm += arm_cmn_nid(cmn, dn->id).port / 2;
+ 
+ 		if (dn->type == CMN_TYPE_DTC) {
+ 			int err;
+@@ -1408,6 +1478,11 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	reg = readl_relaxed(cfg_region + CMN_CFGM_PERIPH_ID_2);
+ 	cmn->rev = FIELD_GET(CMN_CFGM_PID2_REVISION, reg);
+ 
++	reg = readq_relaxed(cfg_region + CMN_CFGM_INFO_GLOBAL);
++	cmn->multi_dtm = reg & CMN_INFO_MULTIPLE_DTM_EN;
++	cmn->rsp_vc_num = FIELD_GET(CMN_INFO_RSP_VC_NUM, reg);
++	cmn->dat_vc_num = FIELD_GET(CMN_INFO_DAT_VC_NUM, reg);
++
+ 	reg = readq_relaxed(cfg_region + CMN_CHILD_INFO);
+ 	child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
+ 	child_poff = FIELD_GET(CMN_CI_CHILD_PTR_OFFSET, reg);
+@@ -1429,7 +1504,11 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	if (!dn)
+ 		return -ENOMEM;
+ 
+-	dtm = devm_kcalloc(cmn->dev, cmn->num_xps, sizeof(*dtm), GFP_KERNEL);
++	/* Initial safe upper bound on DTMs for any possible mesh layout */
++	i = cmn->num_xps;
++	if (cmn->multi_dtm)
++		i += cmn->num_xps + 1;
++	dtm = devm_kcalloc(cmn->dev, i, sizeof(*dtm), GFP_KERNEL);
+ 	if (!dtm)
+ 		return -ENOMEM;
+ 
+@@ -1439,6 +1518,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	for (i = 0; i < cmn->num_xps; i++) {
+ 		void __iomem *xp_region = cmn->base + xp_offset[i];
+ 		struct arm_cmn_node *xp = dn++;
++		unsigned int xp_ports = 0;
+ 
+ 		arm_cmn_init_node_info(cmn, xp_offset[i], xp);
+ 		/*
+@@ -1450,9 +1530,39 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		if (xp->id == (1 << 3))
+ 			cmn->mesh_x = xp->logid;
+ 
+-		xp->dtc = 0xf;
++		if (cmn->model == CMN600)
++			xp->dtc = 0xf;
++		else
++			xp->dtc = 1 << readl_relaxed(xp_region + CMN_DTM_UNIT_INFO);
++
+ 		xp->dtm = dtm - cmn->dtms;
+-		arm_cmn_init_dtm(dtm++, xp);
++		arm_cmn_init_dtm(dtm++, xp, 0);
++		/*
++		 * Keeping track of connected ports will let us filter out
++		 * unnecessary XP events easily. We can also reliably infer the
++		 * "extra device ports" configuration for the node ID format
++		 * from this, since in that case we will see at least one XP
++		 * with port 2 connected, for the HN-D.
++		 */
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P0))
++			xp_ports |= BIT(0);
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P1))
++			xp_ports |= BIT(1);
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P2))
++			xp_ports |= BIT(2);
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P3))
++			xp_ports |= BIT(3);
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P4))
++			xp_ports |= BIT(4);
++		if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P5))
++			xp_ports |= BIT(5);
++
++		if (cmn->multi_dtm && (xp_ports & 0xc))
++			arm_cmn_init_dtm(dtm++, xp, 1);
++		if (cmn->multi_dtm && (xp_ports & 0x30))
++			arm_cmn_init_dtm(dtm++, xp, 2);
++
++		cmn->ports_used |= xp_ports;
+ 
+ 		reg = readq_relaxed(xp_region + CMN_CHILD_INFO);
+ 		child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
+@@ -1488,11 +1598,14 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 			case CMN_TYPE_SBSX:
+ 			case CMN_TYPE_RNI:
+ 			case CMN_TYPE_RND:
++			case CMN_TYPE_MTSX:
+ 			case CMN_TYPE_CXRA:
+ 			case CMN_TYPE_CXHA:
+ 				dn++;
+ 				break;
+ 			/* Nothing to see here */
++			case CMN_TYPE_MPAM_S:
++			case CMN_TYPE_MPAM_NS:
+ 			case CMN_TYPE_RNSAM:
+ 			case CMN_TYPE_CXLA:
+ 				break;
+@@ -1512,6 +1625,11 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 	if (dn)
+ 		cmn->dns = dn;
+ 
++	sz = (void *)dtm - (void *)cmn->dtms;
++	dtm = devm_krealloc(cmn->dev, cmn->dtms, sz, GFP_KERNEL);
++	if (dtm)
++		cmn->dtms = dtm;
++
+ 	/*
+ 	 * If mesh_x wasn't set during discovery then we never saw
+ 	 * an XP at (0,1), thus we must have an Nx1 configuration.
+@@ -1520,9 +1638,15 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
+ 		cmn->mesh_x = cmn->num_xps;
+ 	cmn->mesh_y = cmn->num_xps / cmn->mesh_x;
+ 
++	/* 1x1 config plays havoc with XP event encodings */
++	if (cmn->num_xps == 1)
++		dev_warn(cmn->dev, "1x1 config not fully supported, translate XP events manually\n");
++
+ 	dev_dbg(cmn->dev, "model %d, periph_id_2 revision %d\n", cmn->model, cmn->rev);
+-	dev_dbg(cmn->dev, "mesh %dx%d, ID width %d\n",
+-		cmn->mesh_x, cmn->mesh_y, arm_cmn_xyidbits(cmn));
++	reg = cmn->ports_used;
++	dev_dbg(cmn->dev, "mesh %dx%d, ID width %d, ports %6pbl%s\n",
++		cmn->mesh_x, cmn->mesh_y, arm_cmn_xyidbits(cmn), &reg,
++		cmn->multi_dtm ? ", multi-DTM" : "");
+ 
+ 	return 0;
+ }
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0030-perf-arm-cmn-Add-CI-700-Support.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0030-perf-arm-cmn-Add-CI-700-Support.patch
new file mode 100644
index 0000000..a12911a
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0030-perf-arm-cmn-Add-CI-700-Support.patch
@@ -0,0 +1,150 @@
+From f5d0979c2385c3ef43d6f2af07c14ee897835e2c Mon Sep 17 00:00:00 2001
+From: Robin Murphy <robin.murphy@arm.com>
+Date: Fri, 3 Dec 2021 11:45:02 +0000
+Subject: [PATCH 14/14] perf/arm-cmn: Add CI-700 Support
+
+Add the identifiers and events for the CI-700 coherent interconnect.
+
+Signed-off-by: Robin Murphy <robin.murphy@arm.com>
+Link: https://lore.kernel.org/r/28f566ab23a83733c6c9ef9414c010b760b4549c.1638530442.git.robin.murphy@arm.com
+Signed-off-by: Will Deacon <will@kernel.org>
+
+Upstream-Status: Backport [https://lore.kernel.org/r/28f566ab23a83733c6c9ef9414c010b760b4549c.1638530442.git.robin.murphy@arm.com]
+Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
+---
+ drivers/perf/arm-cmn.c | 57 +++++++++++++++++++++++++++++++++++++++---
+ 1 file changed, 53 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
+index 871c86687379..e0f78b6c643c 100644
+--- a/drivers/perf/arm-cmn.c
++++ b/drivers/perf/arm-cmn.c
+@@ -175,6 +175,7 @@
+ enum cmn_model {
+ 	CMN_ANY = -1,
+ 	CMN600 = 1,
++	CI700 = 2,
+ };
+ 
+ /* CMN-600 r0px shouldn't exist in silicon, thankfully */
+@@ -186,6 +187,9 @@ enum cmn_revision {
+ 	CMN600_R2P0,
+ 	CMN600_R3P0,
+ 	CMN600_R3P1,
++	CI700_R0P0 = 0,
++	CI700_R1P0,
++	CI700_R2P0,
+ };
+ 
+ enum cmn_node_type {
+@@ -401,8 +405,10 @@ struct arm_cmn_format_attr {
+ static bool arm_cmn_is_occup_event(enum cmn_model model,
+ 				   enum cmn_node_type type, unsigned int id)
+ {
+-	return (type == CMN_TYPE_DVM && id == 0x05) ||
+-	       (type == CMN_TYPE_HNF && id == 0x0f);
++	if (type == CMN_TYPE_DVM)
++		return (model == CMN600 && id == 0x05) ||
++		       (model == CI700 && id == 0x0c);
++	return type == CMN_TYPE_HNF && id == 0x0f;
+ }
+ 
+ static ssize_t arm_cmn_event_show(struct device *dev,
+@@ -497,14 +503,19 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
+ 	__CMN_EVENT_XP(n_##_name, (_event) | (2 << 2)),		\
+ 	__CMN_EVENT_XP(s_##_name, (_event) | (3 << 2)),		\
+ 	__CMN_EVENT_XP(p0_##_name, (_event) | (4 << 2)),	\
+-	__CMN_EVENT_XP(p1_##_name, (_event) | (5 << 2))
++	__CMN_EVENT_XP(p1_##_name, (_event) | (5 << 2)),	\
++	__CMN_EVENT_XP(p2_##_name, (_event) | (6 << 2)),	\
++	__CMN_EVENT_XP(p3_##_name, (_event) | (7 << 2))
+ 
+ /* Good thing there are only 3 fundamental XP events... */
+ #define CMN_EVENT_XP(_name, _event)				\
+ 	_CMN_EVENT_XP(req_##_name, (_event) | (0 << 5)),	\
+ 	_CMN_EVENT_XP(rsp_##_name, (_event) | (1 << 5)),	\
+ 	_CMN_EVENT_XP(snp_##_name, (_event) | (2 << 5)),	\
+-	_CMN_EVENT_XP(dat_##_name, (_event) | (3 << 5))
++	_CMN_EVENT_XP(dat_##_name, (_event) | (3 << 5)),	\
++	_CMN_EVENT_XP(pub_##_name, (_event) | (4 << 5)),	\
++	_CMN_EVENT_XP(rsp2_##_name, (_event) | (5 << 5)),	\
++	_CMN_EVENT_XP(dat2_##_name, (_event) | (6 << 5))
+ 
+ 
+ static struct attribute *arm_cmn_event_attrs[] = {
+@@ -522,6 +533,20 @@ static struct attribute *arm_cmn_event_attrs[] = {
+ 	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_all, 0x05, 0),
+ 	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_dvmop, 0x05, 1),
+ 	_CMN_EVENT_DVM(CMN600, rxreq_trk_occupancy_dvmsync, 0x05, 2),
++	CMN_EVENT_DVM(CI700, dvmop_tlbi,		0x01),
++	CMN_EVENT_DVM(CI700, dvmop_bpi,			0x02),
++	CMN_EVENT_DVM(CI700, dvmop_pici,		0x03),
++	CMN_EVENT_DVM(CI700, dvmop_vici,		0x04),
++	CMN_EVENT_DVM(CI700, dvmsync,			0x05),
++	CMN_EVENT_DVM(CI700, vmid_filtered,		0x06),
++	CMN_EVENT_DVM(CI700, rndop_filtered,		0x07),
++	CMN_EVENT_DVM(CI700, retry,			0x08),
++	CMN_EVENT_DVM(CI700, txsnp_flitv,		0x09),
++	CMN_EVENT_DVM(CI700, txsnp_stall,		0x0a),
++	CMN_EVENT_DVM(CI700, trkfull,			0x0b),
++	_CMN_EVENT_DVM(CI700, trk_occupancy_all,	0x0c, 0),
++	_CMN_EVENT_DVM(CI700, trk_occupancy_dvmop,	0x0c, 1),
++	_CMN_EVENT_DVM(CI700, trk_occupancy_dvmsync,	0x0c, 2),
+ 
+ 	CMN_EVENT_HNF(CMN_ANY, cache_miss,		0x01),
+ 	CMN_EVENT_HNF(CMN_ANY, slc_sf_cache_access,	0x02),
+@@ -558,6 +583,9 @@ static struct attribute *arm_cmn_event_attrs[] = {
+ 	CMN_EVENT_HNF(CMN_ANY, stash_snp_sent,		0x1d),
+ 	CMN_EVENT_HNF(CMN_ANY, stash_data_pull,		0x1e),
+ 	CMN_EVENT_HNF(CMN_ANY, snp_fwded,		0x1f),
++	CMN_EVENT_HNF(CI700, atomic_fwd,		0x20),
++	CMN_EVENT_HNF(CI700, mpam_hardlim,		0x21),
++	CMN_EVENT_HNF(CI700, mpam_softlim,		0x22),
+ 
+ 	CMN_EVENT_HNI(rrt_rd_occ_cnt_ovfl,		0x20),
+ 	CMN_EVENT_HNI(rrt_wr_occ_cnt_ovfl,		0x21),
+@@ -598,6 +626,7 @@ static struct attribute *arm_cmn_event_attrs[] = {
+ 	CMN_EVENT_SBSX(CMN_ANY, wdb_occ_cnt_ovfl,	0x14),
+ 	CMN_EVENT_SBSX(CMN_ANY, rd_axi_trkr_occ_cnt_ovfl, 0x15),
+ 	CMN_EVENT_SBSX(CMN_ANY, cmo_axi_trkr_occ_cnt_ovfl, 0x16),
++	CMN_EVENT_SBSX(CI700, rdb_occ_cnt_ovfl,		0x17),
+ 	CMN_EVENT_SBSX(CMN_ANY, arvalid_no_arready,	0x21),
+ 	CMN_EVENT_SBSX(CMN_ANY, awvalid_no_awready,	0x22),
+ 	CMN_EVENT_SBSX(CMN_ANY, wvalid_no_wready,	0x23),
+@@ -624,6 +653,25 @@ static struct attribute *arm_cmn_event_attrs[] = {
+ 	CMN_EVENT_RNID(CMN600, rdb_replay,		0x12),
+ 	CMN_EVENT_RNID(CMN600, rdb_hybrid,		0x13),
+ 	CMN_EVENT_RNID(CMN600, rdb_ord,			0x14),
++	CMN_EVENT_RNID(CI700, padb_occ_ovfl,		0x11),
++	CMN_EVENT_RNID(CI700, rpdb_occ_ovfl,		0x12),
++	CMN_EVENT_RNID(CI700, rrt_occup_ovfl_slice1,	0x13),
++	CMN_EVENT_RNID(CI700, rrt_occup_ovfl_slice2,	0x14),
++	CMN_EVENT_RNID(CI700, rrt_occup_ovfl_slice3,	0x15),
++	CMN_EVENT_RNID(CI700, wrt_throttled,		0x16),
++
++	CMN_EVENT_MTSX(tc_lookup,			0x01),
++	CMN_EVENT_MTSX(tc_fill,				0x02),
++	CMN_EVENT_MTSX(tc_miss,				0x03),
++	CMN_EVENT_MTSX(tdb_forward,			0x04),
++	CMN_EVENT_MTSX(tcq_hazard,			0x05),
++	CMN_EVENT_MTSX(tcq_rd_alloc,			0x06),
++	CMN_EVENT_MTSX(tcq_wr_alloc,			0x07),
++	CMN_EVENT_MTSX(tcq_cmo_alloc,			0x08),
++	CMN_EVENT_MTSX(axi_rd_req,			0x09),
++	CMN_EVENT_MTSX(axi_wr_req,			0x0a),
++	CMN_EVENT_MTSX(tcq_occ_cnt_ovfl,		0x0b),
++	CMN_EVENT_MTSX(tdb_occ_cnt_ovfl,		0x0c),
+ 
+ 	NULL
+ };
+@@ -1773,6 +1821,7 @@ static int arm_cmn_remove(struct platform_device *pdev)
+ #ifdef CONFIG_OF
+ static const struct of_device_id arm_cmn_of_match[] = {
+ 	{ .compatible = "arm,cmn-600", .data = (void *)CMN600 },
++	{ .compatible = "arm,ci-700", .data = (void *)CI700 },
+ 	{}
+ };
+ MODULE_DEVICE_TABLE(of, arm_cmn_of_match);
+-- 
+2.25.1
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0031-firmware-arm_ffa-Fix-uuid-argument-passed-to-ffa_par.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0031-firmware-arm_ffa-Fix-uuid-argument-passed-to-ffa_par.patch
new file mode 100644
index 0000000..35b4f10
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0031-firmware-arm_ffa-Fix-uuid-argument-passed-to-ffa_par.patch
@@ -0,0 +1,29 @@
+From 4d0a8147477699d40a02f121e7c72b21547273cf Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Thu, 13 Jan 2022 20:14:25 +0000
+Subject: [PATCH 19/32] firmware: arm_ffa: Fix uuid argument passed to
+ ffa_partition_probe
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Ib2749ec3e02da5bb6d835f7dbf2d608c41fad1f2
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/firmware/arm_ffa/driver.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
+index 14f900047ac0..8fa1785afd42 100644
+--- a/drivers/firmware/arm_ffa/driver.c
++++ b/drivers/firmware/arm_ffa/driver.c
+@@ -582,7 +582,7 @@ static int ffa_partition_info_get(const char *uuid_str,
+ 		return -ENODEV;
+ 	}
+ 
+-	count = ffa_partition_probe(&uuid_null, &pbuf);
++	count = ffa_partition_probe(&uuid, &pbuf);
+ 	if (count <= 0)
+ 		return -ENOENT;
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0032-firmware-arm_ffa-Add-ffa_dev_get_drvdata.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0032-firmware-arm_ffa-Add-ffa_dev_get_drvdata.patch
new file mode 100644
index 0000000..52cf71b
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0032-firmware-arm_ffa-Add-ffa_dev_get_drvdata.patch
@@ -0,0 +1,33 @@
+From 9acd4425667e240603ec196d8b64b2b25879805e Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Thu, 13 Jan 2022 22:22:28 +0000
+Subject: [PATCH 20/32] firmware: arm_ffa: Add ffa_dev_get_drvdata
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Icd09d686cab9922563b1deda5276307ea5d94923
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ include/linux/arm_ffa.h | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
+index 85651e41ded8..e5c76c1ef9ed 100644
+--- a/include/linux/arm_ffa.h
++++ b/include/linux/arm_ffa.h
+@@ -38,7 +38,12 @@ struct ffa_driver {
+ 
+ static inline void ffa_dev_set_drvdata(struct ffa_device *fdev, void *data)
+ {
+-	fdev->dev.driver_data = data;
++	dev_set_drvdata(&fdev->dev, data);
++}
++
++static inline void *ffa_dev_get_drvdata(struct ffa_device *fdev)
++{
++	return dev_get_drvdata(&fdev->dev);
+ }
+ 
+ #if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0033-firmware-arm_ffa-extern-ffa_bus_type.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0033-firmware-arm_ffa-extern-ffa_bus_type.patch
new file mode 100644
index 0000000..bbbc178
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0033-firmware-arm_ffa-extern-ffa_bus_type.patch
@@ -0,0 +1,30 @@
+From 7a9298916fe892ddac5fe4e0a13a566b1636f542 Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Thu, 13 Jan 2022 22:23:52 +0000
+Subject: [PATCH 21/32] firmware: arm_ffa: extern ffa_bus_type
+
+extern ffa_bus_type so that SP driver can use it in bus_find_device call.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Ib7a6a563aa35627a545f82c796816a5f72c80d70
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ include/linux/arm_ffa.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
+index e5c76c1ef9ed..4eb7e03ca560 100644
+--- a/include/linux/arm_ffa.h
++++ b/include/linux/arm_ffa.h
+@@ -88,6 +88,8 @@ const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev)
+ #define ffa_unregister(driver) \
+ 	ffa_driver_unregister(driver)
+ 
++extern struct bus_type ffa_bus_type;
++
+ /**
+  * module_ffa_driver() - Helper macro for registering a psa_ffa driver
+  * @__ffa_driver: ffa_driver structure
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0034-firmware-arm_ffa-Fix-FFA_MEM_SHARE-and-FFA_MEM_FRAG_.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0034-firmware-arm_ffa-Fix-FFA_MEM_SHARE-and-FFA_MEM_FRAG_.patch
new file mode 100644
index 0000000..977b550
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0034-firmware-arm_ffa-Fix-FFA_MEM_SHARE-and-FFA_MEM_FRAG_.patch
@@ -0,0 +1,54 @@
+From e0b9971db819fb9ed9b08a5d3f6f2a4565e92a1a Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 12:23:04 +0000
+Subject: [PATCH 22/32] firmware: arm_ffa: Fix FFA_MEM_SHARE and
+ FFA_MEM_FRAG_TX
+
+FFA memory share on success might return FFA_MEM_FRAG_RX. In that case
+set handle from w1/w2 from FFA return value.
+
+FFA_MEM_FRAG_TX call will return FFA_SUCCESS for the last fragment, so
+check for this return code.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: I7ef44742d53a9e75d8587d1213be98a1352f16d4
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/firmware/arm_ffa/driver.c | 12 ++++++++----
+ 1 file changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
+index 8fa1785afd42..a3b1df6d7f3c 100644
+--- a/drivers/firmware/arm_ffa/driver.c
++++ b/drivers/firmware/arm_ffa/driver.c
+@@ -398,11 +398,15 @@ static int ffa_mem_first_frag(u32 func_id, phys_addr_t buf, u32 buf_sz,
+ 	if (ret.a0 == FFA_ERROR)
+ 		return ffa_to_linux_errno((int)ret.a2);
+ 
+-	if (ret.a0 != FFA_SUCCESS)
++	if (ret.a0 != FFA_SUCCESS && ret.a0 != FFA_MEM_FRAG_RX)
+ 		return -EOPNOTSUPP;
+ 
+-	if (handle)
+-		*handle = PACK_HANDLE(ret.a2, ret.a3);
++	if (handle) {
++		if (ret.a0 == FFA_MEM_FRAG_RX)
++			*handle = PACK_HANDLE(ret.a1, ret.a2);
++		else
++			*handle = PACK_HANDLE(ret.a2, ret.a3);
++	}
+ 
+ 	return frag_len;
+ }
+@@ -426,7 +430,7 @@ static int ffa_mem_next_frag(u64 handle, u32 frag_len)
+ 	if (ret.a0 == FFA_ERROR)
+ 		return ffa_to_linux_errno((int)ret.a2);
+ 
+-	if (ret.a0 != FFA_MEM_FRAG_RX)
++	if (ret.a0 != FFA_SUCCESS && ret.a0 != FFA_MEM_FRAG_RX)
+ 		return -EOPNOTSUPP;
+ 
+ 	return ret.a3;
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0035-ANDROID-trusty-Backport-of-trusty-driver.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0035-ANDROID-trusty-Backport-of-trusty-driver.patch
new file mode 100644
index 0000000..290de51
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0035-ANDROID-trusty-Backport-of-trusty-driver.patch
@@ -0,0 +1,8099 @@
+From 3e1e61f54538e8ce4bcbb5a9a213624eafcae514 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
+Date: Mon, 18 Nov 2013 20:46:48 -0800
+Subject: [PATCH 18/32] ANDROID: trusty: Backport of trusty driver
+
+This adds Trusty driver from android-trusty-5.10
+
+Original commits:
+b60d55f33484 ANDROID: trusty-ipc: Allow registering multiple handles
+629a4d3318cc ANDROID: trusty: Support setting trusty_shared_mem_id_t
+94a36a1374e7 ANDROID: trusty-log: Don't copy Trusty logs to linux kernel log
+efc21cced8af ANDROID: trusty-log: rework buffer allocation
+8cb1a07ca814 ANDROID: trusty-ipc: Fix lock protection of shared_handles
+52cdd137fae0 ANDROID: trusty-log: support poll()
+24c3649dceb9 ANDROID: trusty-irq: enqueue work in trusty_irq_cpu_up
+05a05bdd921e ANDROID: trusty: Add config TRUSTY_CRASH_IS_PANIC
+b5fbdba2ec72 ANDROID: trusty-ipc: Fix crash when running out of txbuffers
+46da5b95605e ANDROID: trusty: Allow TRUSTY_LEND of buffers
+2ebfb16645af ANDROID: trusty-virtio: remove unnecessary include of dma-mapping.h
+bf9d994a65a2 ANDROID: trusty-log: Complement logging sink with unthrottled virtual file
+d5cb51d0365d ANDROID: trusty-log: Refactor logging state to support concurrent sinks
+b421a5ad3eb3 ANDROID: trusty-log: Sanitize u32 overflow of the log ring buffer write index
+58e9681c57af ANDROID: trusty-log: On trusty panic, unthrottle sink to the kernel log
+ba12be0f203a ANDROID: trusty-log: Update trusty log buffer size to hold a complete  Trusty crash logs
+a8a3f83e52b6 ANDROID: trusty_qemu_defconfig: Enable dma-buf and ion system heaps
+988b52b392a1 ANDROID: trusty: Support setting FF-A Tag
+f544e96489aa ANDROID: Add trusty_qemu_defconfig
+8a9b09317f29 ANDROID: trusty-ipc: Switch from memfd to dma_buf
+5460418ec9a4 ANDROID: trusty-irq: document new way of specifying IPIs
+da3c30b943c2 ANDROID: trusty-irq: specify IPIs in new way
+5b5bb7f74856 ANDROID: trusty: Add trusty-test driver
+e80d87f422fd ANDROID: trusty: Add trusty-ipc driver
+03c248cbf693 ANDROID: trusty: Add trusty-virtio driver
+1047661edb97 ANDROID: trusty: Add trusty-log driver
+18fd5c59b423 ANDROID: trusty: Add trusty-irq driver
+479c39a683f8 ANDROID: trusty: Add trusty-core driver
+
+Upstream-Status: Backport
+Change-Id: I91f71b891a1091383a298e7fb2f9030382a19ca5
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+---
+ .../devicetree/bindings/trusty/trusty-irq.txt |   67 +
+ .../devicetree/bindings/trusty/trusty-smc.txt |    6 +
+ arch/arm/configs/trusty_qemu_defconfig        |  291 +++
+ .../configs/trusty_qemu_defconfig.fragment    |   26 +
+ drivers/Kconfig                               |    2 +
+ drivers/Makefile                              |    1 +
+ drivers/trusty/Kconfig                        |  116 +
+ drivers/trusty/Makefile                       |   14 +
+ drivers/trusty/trusty-ipc.c                   | 2256 +++++++++++++++++
+ drivers/trusty/trusty-irq.c                   |  645 +++++
+ drivers/trusty/trusty-log.c                   |  830 ++++++
+ drivers/trusty/trusty-log.h                   |   28 +
+ drivers/trusty/trusty-mem.c                   |  139 +
+ drivers/trusty/trusty-smc-arm.S               |   41 +
+ drivers/trusty/trusty-smc-arm64.S             |   35 +
+ drivers/trusty/trusty-smc.h                   |   26 +
+ drivers/trusty/trusty-test.c                  |  440 ++++
+ drivers/trusty/trusty-test.h                  |   13 +
+ drivers/trusty/trusty-virtio.c                |  840 ++++++
+ drivers/trusty/trusty.c                       |  981 +++++++
+ include/linux/trusty/arm_ffa.h                |  590 +++++
+ include/linux/trusty/sm_err.h                 |   28 +
+ include/linux/trusty/smcall.h                 |  124 +
+ include/linux/trusty/trusty.h                 |  131 +
+ include/linux/trusty/trusty_ipc.h             |   89 +
+ include/uapi/linux/trusty/ipc.h               |   65 +
+ include/uapi/linux/virtio_ids.h               |    1 +
+ 27 files changed, 7825 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/trusty/trusty-irq.txt
+ create mode 100644 Documentation/devicetree/bindings/trusty/trusty-smc.txt
+ create mode 100644 arch/arm/configs/trusty_qemu_defconfig
+ create mode 100644 arch/arm64/configs/trusty_qemu_defconfig.fragment
+ create mode 100644 drivers/trusty/Kconfig
+ create mode 100644 drivers/trusty/Makefile
+ create mode 100644 drivers/trusty/trusty-ipc.c
+ create mode 100644 drivers/trusty/trusty-irq.c
+ create mode 100644 drivers/trusty/trusty-log.c
+ create mode 100644 drivers/trusty/trusty-log.h
+ create mode 100644 drivers/trusty/trusty-mem.c
+ create mode 100644 drivers/trusty/trusty-smc-arm.S
+ create mode 100644 drivers/trusty/trusty-smc-arm64.S
+ create mode 100644 drivers/trusty/trusty-smc.h
+ create mode 100644 drivers/trusty/trusty-test.c
+ create mode 100644 drivers/trusty/trusty-test.h
+ create mode 100644 drivers/trusty/trusty-virtio.c
+ create mode 100644 drivers/trusty/trusty.c
+ create mode 100644 include/linux/trusty/arm_ffa.h
+ create mode 100644 include/linux/trusty/sm_err.h
+ create mode 100644 include/linux/trusty/smcall.h
+ create mode 100644 include/linux/trusty/trusty.h
+ create mode 100644 include/linux/trusty/trusty_ipc.h
+ create mode 100644 include/uapi/linux/trusty/ipc.h
+
+diff --git a/Documentation/devicetree/bindings/trusty/trusty-irq.txt b/Documentation/devicetree/bindings/trusty/trusty-irq.txt
+new file mode 100644
+index 000000000000..cbb545ad452b
+--- /dev/null
++++ b/Documentation/devicetree/bindings/trusty/trusty-irq.txt
+@@ -0,0 +1,67 @@
++Trusty irq interface
++
++Trusty requires non-secure irqs to be forwarded to the secure OS.
++
++Required properties:
++- compatible: "android,trusty-irq-v1"
++
++Optional properties:
++
++- interrupt-templates: is an optional property that works together
++  with "interrupt-ranges" to specify secure side to kernel IRQs mapping.
++
++  It is a list of entries, each one of which defines a group of interrupts
++  having common properties, and has the following format:
++    < phandle irq_id_pos [templ_data]>
++      phandle - phandle of interrupt controller this template is for
++      irq_id_pos - the position of irq id in interrupt specifier array
++                   for interrupt controller referenced by phandle.
++      templ_data - is an array of u32 values (could be empty) in the same
++                   format as interrupt specifier for interrupt controller
++                   referenced by phandle but with omitted irq id field.
++
++- interrupt-ranges: list of entries that specifies secure side to kernel
++  IRQs mapping.
++
++  Each entry in the "interrupt-ranges" list has the following format:
++    <beg end templ_idx>
++      beg - first entry in this range
++      end - last entry in this range
++      templ_idx  - index of entry in "interrupt-templates" property
++                   that must be used as a template for all interrupts
++                   in this range
++
++- ipi-range: optional mapping of a linear range of trusty IRQs to a linear range
++  of IPIs (inter-processor interrupts).  This has the following format:
++    <beg end ipi_base>
++      beg - first trusty IRQ number that is an IPI
++      end - last trusty IRQ number that is an IPI
++      ipi_base - IPI number of 'beg'
++
++Example:
++{
++	gic: interrupt-controller@50041000 {
++		compatible = "arm,gic-400";
++		#interrupt-cells = <3>;
++		interrupt-controller;
++		...
++	};
++	...
++	trusty {
++		compatible = "android,trusty-smc-v1";
++		ranges;
++		#address-cells = <2>;
++		#size-cells = <2>;
++
++		irq {
++			compatible = "android,trusty-irq-v1";
++			interrupt-templates = <&gic 1 GIC_PPI 0>,
++					      <&gic 1 GIC_SPI 0>;
++			interrupt-ranges = <16  31 0>,
++					   <32 223 1>;
++			ipi-range = <8 15 8>;
++		};
++	}
++}
++
++Must be a child of the node that provides the trusty std/fast call interface.
+diff --git a/Documentation/devicetree/bindings/trusty/trusty-smc.txt b/Documentation/devicetree/bindings/trusty/trusty-smc.txt
+new file mode 100644
+index 000000000000..1b39ad317c67
+--- /dev/null
++++ b/Documentation/devicetree/bindings/trusty/trusty-smc.txt
+@@ -0,0 +1,6 @@
++Trusty smc interface
++
++Trusty is running in secure mode on the same (arm) cpu(s) as the current os.
++
++Required properties:
++- compatible: "android,trusty-smc-v1"
+diff --git a/arch/arm/configs/trusty_qemu_defconfig b/arch/arm/configs/trusty_qemu_defconfig
+new file mode 100644
+index 000000000000..46ad9504c23d
+--- /dev/null
++++ b/arch/arm/configs/trusty_qemu_defconfig
+@@ -0,0 +1,291 @@
++# CONFIG_LOCALVERSION_AUTO is not set
++# CONFIG_SWAP is not set
++CONFIG_POSIX_MQUEUE=y
++CONFIG_AUDIT=y
++CONFIG_NO_HZ=y
++CONFIG_HIGH_RES_TIMERS=y
++CONFIG_PREEMPT=y
++CONFIG_BSD_PROCESS_ACCT=y
++CONFIG_BSD_PROCESS_ACCT_V3=y
++CONFIG_TASKSTATS=y
++CONFIG_TASK_DELAY_ACCT=y
++CONFIG_TASK_XACCT=y
++CONFIG_TASK_IO_ACCOUNTING=y
++CONFIG_IKCONFIG=y
++CONFIG_IKCONFIG_PROC=y
++CONFIG_LOG_BUF_SHIFT=14
++CONFIG_RT_GROUP_SCHED=y
++CONFIG_CGROUP_FREEZER=y
++CONFIG_CGROUP_CPUACCT=y
++CONFIG_CGROUP_DEBUG=y
++CONFIG_SCHED_AUTOGROUP=y
++CONFIG_BLK_DEV_INITRD=y
++CONFIG_KALLSYMS_ALL=y
++CONFIG_EMBEDDED=y
++# CONFIG_COMPAT_BRK is not set
++CONFIG_PROFILING=y
++CONFIG_ARCH_VIRT=y
++CONFIG_PCI=y
++CONFIG_PCI_HOST_GENERIC=y
++CONFIG_SMP=y
++CONFIG_HIGHMEM=y
++CONFIG_SECCOMP=y
++CONFIG_CMDLINE="console=ttyAMA0"
++CONFIG_PM_AUTOSLEEP=y
++CONFIG_PM_WAKELOCKS=y
++CONFIG_PM_WAKELOCKS_LIMIT=0
++# CONFIG_PM_WAKELOCKS_GC is not set
++CONFIG_PM_DEBUG=y
++# CONFIG_BLK_DEV_BSG is not set
++# CONFIG_IOSCHED_DEADLINE is not set
++# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
++CONFIG_KSM=y
++CONFIG_NET=y
++CONFIG_PACKET=y
++CONFIG_UNIX=y
++CONFIG_XFRM_USER=y
++CONFIG_NET_KEY=y
++CONFIG_INET=y
++CONFIG_IP_MULTICAST=y
++CONFIG_IP_ADVANCED_ROUTER=y
++CONFIG_IP_MULTIPLE_TABLES=y
++CONFIG_IP_PNP=y
++CONFIG_IP_PNP_DHCP=y
++CONFIG_IP_PNP_BOOTP=y
++CONFIG_INET_ESP=y
++CONFIG_INET_DIAG_DESTROY=y
++CONFIG_IPV6_ROUTER_PREF=y
++CONFIG_IPV6_ROUTE_INFO=y
++CONFIG_IPV6_OPTIMISTIC_DAD=y
++CONFIG_INET6_AH=y
++CONFIG_INET6_ESP=y
++CONFIG_INET6_IPCOMP=y
++CONFIG_IPV6_MIP6=y
++CONFIG_IPV6_MULTIPLE_TABLES=y
++CONFIG_NETFILTER=y
++CONFIG_NF_CONNTRACK=y
++CONFIG_NF_CONNTRACK_SECMARK=y
++CONFIG_NF_CONNTRACK_EVENTS=y
++CONFIG_NF_CONNTRACK_AMANDA=y
++CONFIG_NF_CONNTRACK_FTP=y
++CONFIG_NF_CONNTRACK_H323=y
++CONFIG_NF_CONNTRACK_IRC=y
++CONFIG_NF_CONNTRACK_NETBIOS_NS=y
++CONFIG_NF_CONNTRACK_PPTP=y
++CONFIG_NF_CONNTRACK_SANE=y
++CONFIG_NF_CONNTRACK_TFTP=y
++CONFIG_NF_CT_NETLINK=y
++CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
++CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
++CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
++CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
++CONFIG_NETFILTER_XT_TARGET_MARK=y
++CONFIG_NETFILTER_XT_TARGET_NFLOG=y
++CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
++CONFIG_NETFILTER_XT_TARGET_TPROXY=y
++CONFIG_NETFILTER_XT_TARGET_TRACE=y
++CONFIG_NETFILTER_XT_TARGET_SECMARK=y
++CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
++CONFIG_NETFILTER_XT_MATCH_COMMENT=y
++CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
++CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
++CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
++CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
++CONFIG_NETFILTER_XT_MATCH_HELPER=y
++CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
++CONFIG_NETFILTER_XT_MATCH_LENGTH=y
++CONFIG_NETFILTER_XT_MATCH_LIMIT=y
++CONFIG_NETFILTER_XT_MATCH_MAC=y
++CONFIG_NETFILTER_XT_MATCH_MARK=y
++CONFIG_NETFILTER_XT_MATCH_POLICY=y
++CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
++CONFIG_NETFILTER_XT_MATCH_QUOTA=y
++CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
++CONFIG_NETFILTER_XT_MATCH_SOCKET=y
++CONFIG_NETFILTER_XT_MATCH_STATE=y
++CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
++CONFIG_NETFILTER_XT_MATCH_STRING=y
++CONFIG_NETFILTER_XT_MATCH_TIME=y
++CONFIG_NETFILTER_XT_MATCH_U32=y
++CONFIG_IP_NF_IPTABLES=y
++CONFIG_IP_NF_MATCH_AH=y
++CONFIG_IP_NF_MATCH_ECN=y
++CONFIG_IP_NF_MATCH_RPFILTER=y
++CONFIG_IP_NF_MATCH_TTL=y
++CONFIG_IP_NF_FILTER=y
++CONFIG_IP_NF_TARGET_REJECT=y
++CONFIG_IP_NF_MANGLE=y
++CONFIG_IP_NF_TARGET_ECN=y
++CONFIG_IP_NF_TARGET_TTL=y
++CONFIG_IP_NF_RAW=y
++CONFIG_IP_NF_SECURITY=y
++CONFIG_IP_NF_ARPTABLES=y
++CONFIG_IP_NF_ARPFILTER=y
++CONFIG_IP_NF_ARP_MANGLE=y
++CONFIG_IP6_NF_IPTABLES=y
++CONFIG_IP6_NF_MATCH_AH=y
++CONFIG_IP6_NF_MATCH_EUI64=y
++CONFIG_IP6_NF_MATCH_FRAG=y
++CONFIG_IP6_NF_MATCH_OPTS=y
++CONFIG_IP6_NF_MATCH_HL=y
++CONFIG_IP6_NF_MATCH_IPV6HEADER=y
++CONFIG_IP6_NF_MATCH_MH=y
++CONFIG_IP6_NF_MATCH_RT=y
++CONFIG_IP6_NF_TARGET_HL=y
++CONFIG_IP6_NF_FILTER=y
++CONFIG_IP6_NF_TARGET_REJECT=y
++CONFIG_IP6_NF_MANGLE=y
++CONFIG_IP6_NF_RAW=y
++CONFIG_BRIDGE=y
++CONFIG_NET_SCHED=y
++CONFIG_NET_SCH_HTB=y
++CONFIG_NET_CLS_U32=y
++CONFIG_NET_EMATCH=y
++CONFIG_NET_EMATCH_U32=y
++CONFIG_NET_CLS_ACT=y
++# CONFIG_WIRELESS is not set
++CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
++CONFIG_BLK_DEV_LOOP=y
++CONFIG_BLK_DEV_RAM=y
++CONFIG_BLK_DEV_RAM_SIZE=8192
++CONFIG_VIRTIO_BLK=y
++CONFIG_SCSI=y
++# CONFIG_SCSI_PROC_FS is not set
++CONFIG_BLK_DEV_SD=y
++# CONFIG_SCSI_LOWLEVEL is not set
++CONFIG_MD=y
++CONFIG_BLK_DEV_DM=y
++CONFIG_DM_CRYPT=y
++CONFIG_DM_UEVENT=y
++CONFIG_DM_VERITY=y
++CONFIG_DM_VERITY_FEC=y
++CONFIG_NETDEVICES=y
++CONFIG_TUN=y
++CONFIG_VIRTIO_NET=y
++CONFIG_E1000=y
++CONFIG_E1000E=y
++CONFIG_PPP=y
++CONFIG_PPP_BSDCOMP=y
++CONFIG_PPP_DEFLATE=y
++CONFIG_PPP_MPPE=y
++# CONFIG_WLAN is not set
++CONFIG_INPUT_EVDEV=y
++CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
++# CONFIG_INPUT_MOUSE is not set
++CONFIG_INPUT_JOYSTICK=y
++CONFIG_INPUT_TABLET=y
++CONFIG_INPUT_MISC=y
++CONFIG_INPUT_UINPUT=y
++# CONFIG_SERIO_SERPORT is not set
++# CONFIG_VT is not set
++# CONFIG_LEGACY_PTYS is not set
++# CONFIG_DEVMEM is not set
++CONFIG_SERIAL_AMBA_PL011=y
++CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
++CONFIG_VIRTIO_CONSOLE=y
++# CONFIG_HW_RANDOM is not set
++CONFIG_BATTERY_GOLDFISH=y
++# CONFIG_HWMON is not set
++CONFIG_TRUSTY=y
++CONFIG_MEDIA_SUPPORT=y
++CONFIG_FB=y
++CONFIG_FB_GOLDFISH=y
++CONFIG_FB_SIMPLE=y
++CONFIG_BACKLIGHT_LCD_SUPPORT=y
++CONFIG_LOGO=y
++# CONFIG_LOGO_LINUX_MONO is not set
++# CONFIG_LOGO_LINUX_VGA16 is not set
++CONFIG_SOUND=y
++CONFIG_SND=y
++CONFIG_HIDRAW=y
++CONFIG_UHID=y
++CONFIG_HID_A4TECH=y
++CONFIG_HID_ACRUX=y
++CONFIG_HID_ACRUX_FF=y
++CONFIG_HID_APPLE=y
++CONFIG_HID_BELKIN=y
++CONFIG_HID_CHERRY=y
++CONFIG_HID_CHICONY=y
++CONFIG_HID_PRODIKEYS=y
++CONFIG_HID_CYPRESS=y
++CONFIG_HID_DRAGONRISE=y
++CONFIG_DRAGONRISE_FF=y
++CONFIG_HID_EMS_FF=y
++CONFIG_HID_ELECOM=y
++CONFIG_HID_EZKEY=y
++CONFIG_HID_KEYTOUCH=y
++CONFIG_HID_KYE=y
++CONFIG_HID_WALTOP=y
++CONFIG_HID_GYRATION=y
++CONFIG_HID_TWINHAN=y
++CONFIG_HID_KENSINGTON=y
++CONFIG_HID_LCPOWER=y
++CONFIG_HID_LOGITECH=y
++CONFIG_HID_LOGITECH_DJ=y
++CONFIG_LOGITECH_FF=y
++CONFIG_LOGIRUMBLEPAD2_FF=y
++CONFIG_LOGIG940_FF=y
++CONFIG_HID_MAGICMOUSE=y
++CONFIG_HID_MICROSOFT=y
++CONFIG_HID_MONTEREY=y
++CONFIG_HID_MULTITOUCH=y
++CONFIG_HID_ORTEK=y
++CONFIG_HID_PANTHERLORD=y
++CONFIG_PANTHERLORD_FF=y
++CONFIG_HID_PETALYNX=y
++CONFIG_HID_PICOLCD=y
++CONFIG_HID_PRIMAX=y
++CONFIG_HID_SAITEK=y
++CONFIG_HID_SAMSUNG=y
++CONFIG_HID_SPEEDLINK=y
++CONFIG_HID_SUNPLUS=y
++CONFIG_HID_GREENASIA=y
++CONFIG_GREENASIA_FF=y
++CONFIG_HID_SMARTJOYPLUS=y
++CONFIG_SMARTJOYPLUS_FF=y
++CONFIG_HID_TIVO=y
++CONFIG_HID_TOPSEED=y
++CONFIG_HID_THRUSTMASTER=y
++CONFIG_HID_ZEROPLUS=y
++CONFIG_HID_ZYDACRON=y
++# CONFIG_USB_SUPPORT is not set
++CONFIG_RTC_CLASS=y
++CONFIG_VIRTIO_PCI=y
++CONFIG_VIRTIO_MMIO=y
++CONFIG_STAGING=y
++CONFIG_ASHMEM=y
++CONFIG_ION=y
++CONFIG_GOLDFISH_AUDIO=y
++CONFIG_GOLDFISH=y
++CONFIG_GOLDFISH_PIPE=y
++# CONFIG_IOMMU_SUPPORT is not set
++CONFIG_ANDROID=y
++CONFIG_ANDROID_BINDER_IPC=y
++CONFIG_EXT2_FS=y
++CONFIG_EXT4_FS=y
++CONFIG_EXT4_FS_SECURITY=y
++CONFIG_QUOTA=y
++CONFIG_FUSE_FS=y
++CONFIG_CUSE=y
++CONFIG_MSDOS_FS=y
++CONFIG_VFAT_FS=y
++CONFIG_TMPFS=y
++CONFIG_TMPFS_POSIX_ACL=y
++# CONFIG_MISC_FILESYSTEMS is not set
++CONFIG_NFS_FS=y
++CONFIG_ROOT_NFS=y
++CONFIG_NLS_CODEPAGE_437=y
++CONFIG_NLS_ISO8859_1=y
++CONFIG_SECURITY=y
++CONFIG_SECURITY_NETWORK=y
++CONFIG_SECURITY_SELINUX=y
++CONFIG_DYNAMIC_DEBUG=y
++CONFIG_DEBUG_INFO=y
++CONFIG_DEBUG_FS=y
++CONFIG_MAGIC_SYSRQ=y
++CONFIG_PANIC_TIMEOUT=5
++# CONFIG_SCHED_DEBUG is not set
++CONFIG_SCHEDSTATS=y
++# CONFIG_FTRACE is not set
++CONFIG_DMA_API_DEBUG=y
++CONFIG_ATOMIC64_SELFTEST=y
+diff --git a/arch/arm64/configs/trusty_qemu_defconfig.fragment b/arch/arm64/configs/trusty_qemu_defconfig.fragment
+new file mode 100644
+index 000000000000..166eef1797fd
+--- /dev/null
++++ b/arch/arm64/configs/trusty_qemu_defconfig.fragment
+@@ -0,0 +1,26 @@
++# From goldfish
++CONFIG_VIRTIO_BLK=y
++CONFIG_VIRTIO_CONSOLE=y
++CONFIG_VIRTIO_INPUT=y
++CONFIG_VIRTIO_MMIO=y
++CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
++CONFIG_VIRTIO_NET=y
++CONFIG_VIRTIO_PCI=y
++CONFIG_VIRTIO_PMEM=y
++# From Trusty
++CONFIG_TRUSTY=y
++CONFIG_DMA_API_DEBUG=y
++CONFIG_DYNAMIC_DEBUG=y
++CONFIG_PROVE_LOCKING=y
++CONFIG_DEBUG_ATOMIC_SLEEP=y
++CONFIG_SEMIHOSTING_EXIT=y
++CONFIG_E1000=y
++CONFIG_E1000E=y
++CONFIG_REBOOT_EMULATOR_EXIT=y
++CONFIG_DMABUF_HEAPS_SYSTEM=y
++# securefb test uses ION
++CONFIG_ION=y
++CONFIG_ION_SYSTEM_HEAP=y
++# LTO slows down build times considerably. Disable it.
++# CONFIG_LTO_CLANG is not set
++# CONFIG_LTO_CLANG_FULL is not set
+diff --git a/drivers/Kconfig b/drivers/Kconfig
+index dcecc9f6e33f..2e9abcc98126 100644
+--- a/drivers/Kconfig
++++ b/drivers/Kconfig
+@@ -86,6 +86,8 @@ source "drivers/hwmon/Kconfig"
+ 
+ source "drivers/thermal/Kconfig"
+ 
++source "drivers/trusty/Kconfig"
++
+ source "drivers/watchdog/Kconfig"
+ 
+ source "drivers/ssb/Kconfig"
+diff --git a/drivers/Makefile b/drivers/Makefile
+index 576228037718..7d15799dbe77 100644
+--- a/drivers/Makefile
++++ b/drivers/Makefile
+@@ -118,6 +118,7 @@ obj-$(CONFIG_W1)		+= w1/
+ obj-y				+= power/
+ obj-$(CONFIG_HWMON)		+= hwmon/
+ obj-$(CONFIG_THERMAL)		+= thermal/
++obj-$(CONFIG_TRUSTY)		+= trusty/
+ obj-$(CONFIG_WATCHDOG)		+= watchdog/
+ obj-$(CONFIG_MD)		+= md/
+ obj-$(CONFIG_BT)		+= bluetooth/
+diff --git a/drivers/trusty/Kconfig b/drivers/trusty/Kconfig
+new file mode 100644
+index 000000000000..fcde7f097acf
+--- /dev/null
++++ b/drivers/trusty/Kconfig
+@@ -0,0 +1,116 @@
++# SPDX-License-Identifier: GPL-2.0-only
++#
++# Trusty driver
++#
++
++menu "Trusty driver"
++
++config TRUSTY
++	tristate "Trusty core driver"
++	depends on ARM || ARM64
++	help
++	  Trusty is a secure OS that provides a Trusted Execution Environment
++	  (TEE) for Android.  Trusty runs on the same processor as Linux but is
++	  isolated from the rest of the system by both hardware and software.
++
++	  This option enables the core part of the Linux kernel driver for
++	  Trusty.  This doesn't do much by itself; you'll need to enable some of
++	  the sub-modules too.
++
++	  If you build this as a module, it will be called trusty-core.
++
++if TRUSTY
++
++config TRUSTY_IRQ
++	tristate "Trusty IRQ support"
++	default y
++	help
++	  Enable forwarding of IRQs from Linux to Trusty.  This module retrieves
++	  from Trusty a list of IRQs that Trusty uses, and it registers handlers
++	  for them which notify Trusty that the IRQ has been received.
++
++	  If you build this as a module, it will be called trusty-irq.
++
++	  Usually this is needed for Trusty to work, so say 'y' or 'm'.
++
++config TRUSTY_LOG
++	tristate "Trusty log support"
++	default y
++	help
++	  Print log messages generated by the secure OS to the Linux kernel log.
++
++	  While this module is loaded, messages are retrieved and printed after
++	  each call into Trusty, and also during Linux kernel panics.
++
++	  If you build this as a module, it will be called trusty-log.
++
++config TRUSTY_TEST
++	tristate "Trusty stdcall test"
++	default y
++	help
++	  Allow running tests of the Trusty stdcall interface.  Running these
++	  tests is initiated by userspace writing to a sysfs file.
++
++	  This depends on having a test sevice running on the Trusty side.
++
++	  If you build this as a module, it will be called trusty-test.
++
++config TRUSTY_VIRTIO
++	tristate "Trusty virtio support"
++	select VIRTIO
++	default y
++	help
++	  Enable the Trusty virtio driver, which is responsible for management
++	  and interaction with virtio devices exposed by Trusty.  This driver
++	  requests the virtio device descriptors from Trusty, then parses them
++	  and adds the corresponding virtio devices.
++
++	  If you build this as a module, it will be called trusty-virtio.
++
++config TRUSTY_VIRTIO_IPC
++	tristate "Trusty Virtio IPC driver"
++	depends on TRUSTY_VIRTIO
++	default y
++	help
++	  Enable support for communicating with Trusty services.
++
++	  If you build this as a module, it will be called trusty-ipc.
++
++config TRUSTY_DMA_BUF_FFA_TAG
++	bool "Availability of trusty_dma_buf_get_ffa_tag"
++	default n
++	help
++	  Whether trusty_dma_buf_get_ffa_tag is provided on this platform.
++	  Providing this function will allow the platform to select what tag
++	  should be passed to the SPM when attempting to transfer the buffer
++	  to secure world. The value passed here is implementation defined and
++	  may depend on your SPM.
++
++	  If set to N, a default implementation which returns 0 will be used.
++
++config TRUSTY_DMA_BUF_SHARED_MEM_ID
++	bool "Availability of trusty_dma_buf_get_shared_mem_id"
++	default n
++	help
++	  Whether trusty_dma_buf_get_shared_mem_id is provided on this platform.
++	  Providing this function allows the platform to manage memory
++	  transaction life cycle of DMA bufs independently of Trusty IPC driver.
++	  The latter can query trusty_shared_mem_id_t value allocated for a
++	  given DMA buf using trusty_dma_buf_get_shared_mem_id interface.
++
++	  If set to N, a default implementation which does not allocate any IDs
++	  will be used.
++
++config TRUSTY_CRASH_IS_PANIC
++	bool "When trusty panics, then panic the kernel"
++	help
++	 This option will treat Trusty panics as fatal.  This is useful if
++	 your system cannot recover from Trusty panic/halt and you require
++	 the system to reboot to recover.
++
++	 If N, it will contine to run the kernel, but trusty operations will
++	 return errors.
++
++endif # TRUSTY
++
++endmenu
+diff --git a/drivers/trusty/Makefile b/drivers/trusty/Makefile
+new file mode 100644
+index 000000000000..2cf1cfccf97b
+--- /dev/null
++++ b/drivers/trusty/Makefile
+@@ -0,0 +1,14 @@
++# SPDX-License-Identifier: GPL-2.0-only
++#
++# Makefile for trusty components
++#
++
++obj-$(CONFIG_TRUSTY)		+= trusty-core.o
++trusty-core-objs		+= trusty.o trusty-mem.o
++trusty-core-$(CONFIG_ARM)	+= trusty-smc-arm.o
++trusty-core-$(CONFIG_ARM64)	+= trusty-smc-arm64.o
++obj-$(CONFIG_TRUSTY_IRQ)	+= trusty-irq.o
++obj-$(CONFIG_TRUSTY_LOG)	+= trusty-log.o
++obj-$(CONFIG_TRUSTY_TEST)	+= trusty-test.o
++obj-$(CONFIG_TRUSTY_VIRTIO)	+= trusty-virtio.o
++obj-$(CONFIG_TRUSTY_VIRTIO_IPC)	+= trusty-ipc.o
+diff --git a/drivers/trusty/trusty-ipc.c b/drivers/trusty/trusty-ipc.c
+new file mode 100644
+index 000000000000..82d6ddeb41f4
+--- /dev/null
++++ b/drivers/trusty/trusty-ipc.c
+@@ -0,0 +1,2256 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2020 Google, Inc.
++ */
++
++#include <linux/aio.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/cdev.h>
++#include <linux/slab.h>
++#include <linux/fs.h>
++#include <linux/poll.h>
++#include <linux/idr.h>
++#include <linux/completion.h>
++#include <linux/dma-buf.h>
++#include <linux/sched.h>
++#include <linux/sched/signal.h>
++#include <linux/compat.h>
++#include <linux/uio.h>
++#include <linux/file.h>
++
++#include <linux/virtio.h>
++#include <linux/virtio_ids.h>
++#include <linux/virtio_config.h>
++
++#include <linux/trusty/trusty.h>
++#include <linux/trusty/trusty_ipc.h>
++
++#include <uapi/linux/trusty/ipc.h>
++
++#define MAX_DEVICES			4
++
++#define REPLY_TIMEOUT			5000
++#define TXBUF_TIMEOUT			15000
++
++#define MAX_SRV_NAME_LEN		256
++#define MAX_DEV_NAME_LEN		32
++
++#define DEFAULT_MSG_BUF_SIZE		PAGE_SIZE
++#define DEFAULT_MSG_BUF_ALIGN		PAGE_SIZE
++
++#define TIPC_CTRL_ADDR			53
++#define TIPC_ANY_ADDR			0xFFFFFFFF
++
++#define TIPC_MIN_LOCAL_ADDR		1024
++
++#ifdef CONFIG_COMPAT
++#define TIPC_IOC32_CONNECT	_IOW(TIPC_IOC_MAGIC, 0x80, compat_uptr_t)
++#endif
++
++struct tipc_virtio_dev;
++
++struct tipc_dev_config {
++	u32 msg_buf_max_size;
++	u32 msg_buf_alignment;
++	char dev_name[MAX_DEV_NAME_LEN];
++} __packed;
++
++struct tipc_shm {
++	trusty_shared_mem_id_t obj_id;
++	u64 size;
++	u64 tag;
++};
++
++struct tipc_msg_hdr {
++	u32 src;
++	u32 dst;
++	u16 reserved;
++	u16 shm_cnt;
++	u16 len;
++	u16 flags;
++	u8 data[];
++} __packed;
++
++enum tipc_ctrl_msg_types {
++	TIPC_CTRL_MSGTYPE_GO_ONLINE = 1,
++	TIPC_CTRL_MSGTYPE_GO_OFFLINE,
++	TIPC_CTRL_MSGTYPE_CONN_REQ,
++	TIPC_CTRL_MSGTYPE_CONN_RSP,
++	TIPC_CTRL_MSGTYPE_DISC_REQ,
++	TIPC_CTRL_MSGTYPE_RELEASE,
++};
++
++struct tipc_ctrl_msg {
++	u32 type;
++	u32 body_len;
++	u8  body[];
++} __packed;
++
++struct tipc_conn_req_body {
++	char name[MAX_SRV_NAME_LEN];
++} __packed;
++
++struct tipc_conn_rsp_body {
++	u32 target;
++	u32 status;
++	u32 remote;
++	u32 max_msg_size;
++	u32 max_msg_cnt;
++} __packed;
++
++struct tipc_disc_req_body {
++	u32 target;
++} __packed;
++
++struct tipc_release_body {
++	trusty_shared_mem_id_t id;
++} __packed;
++
++struct tipc_cdev_node {
++	struct cdev cdev;
++	struct device *dev;
++	unsigned int minor;
++};
++
++enum tipc_device_state {
++	VDS_OFFLINE = 0,
++	VDS_ONLINE,
++	VDS_DEAD,
++};
++
++struct tipc_virtio_dev {
++	struct kref refcount;
++	struct mutex lock; /* protects access to this device */
++	struct virtio_device *vdev;
++	struct virtqueue *rxvq;
++	struct virtqueue *txvq;
++	unsigned int msg_buf_cnt;
++	unsigned int msg_buf_max_cnt;
++	size_t msg_buf_max_sz;
++	unsigned int free_msg_buf_cnt;
++	struct list_head free_buf_list;
++	wait_queue_head_t sendq;
++	struct idr addr_idr;
++	enum tipc_device_state state;
++	struct tipc_cdev_node cdev_node;
++	/* protects shared_handles, dev lock never acquired while held */
++	struct mutex shared_handles_lock;
++	struct rb_root shared_handles;
++	char   cdev_name[MAX_DEV_NAME_LEN];
++};
++
++enum tipc_chan_state {
++	TIPC_DISCONNECTED = 0,
++	TIPC_CONNECTING,
++	TIPC_CONNECTED,
++	TIPC_STALE,
++};
++
++struct tipc_chan {
++	struct mutex lock; /* protects channel state  */
++	struct kref refcount;
++	enum tipc_chan_state state;
++	struct tipc_virtio_dev *vds;
++	const struct tipc_chan_ops *ops;
++	void *ops_arg;
++	u32 remote;
++	u32 local;
++	u32 max_msg_size;
++	u32 max_msg_cnt;
++	char srv_name[MAX_SRV_NAME_LEN];
++};
++
++struct tipc_shared_handle {
++	struct rb_node node;
++	struct tipc_shm tipc;
++	struct tipc_virtio_dev *vds;
++	struct dma_buf *dma_buf;
++	bool shared;
++	/*
++	 * Following fields are only used if dma_buf does not own a
++	 * trusty_shared_mem_id_t.
++	 */
++	struct dma_buf_attachment *attach;
++	struct sg_table *sgt;
++};
++
++static struct class *tipc_class;
++static unsigned int tipc_major;
++
++static struct virtio_device *default_vdev;
++
++static DEFINE_IDR(tipc_devices);
++static DEFINE_MUTEX(tipc_devices_lock);
++
++static int _match_any(int id, void *p, void *data)
++{
++	return id;
++}
++
++static int _match_data(int id, void *p, void *data)
++{
++	return (p == data);
++}
++
++static void *_alloc_shareable_mem(size_t sz, gfp_t gfp)
++{
++	return alloc_pages_exact(sz, gfp);
++}
++
++static void _free_shareable_mem(size_t sz, void *va)
++{
++	free_pages_exact(va, sz);
++}
++
++static struct tipc_msg_buf *vds_alloc_msg_buf(struct tipc_virtio_dev *vds,
++					      bool share_write)
++{
++	int ret;
++	struct tipc_msg_buf *mb;
++	size_t sz = vds->msg_buf_max_sz;
++	pgprot_t pgprot = share_write ? PAGE_KERNEL : PAGE_KERNEL_RO;
++
++	/* allocate tracking structure */
++	mb = kzalloc(sizeof(struct tipc_msg_buf), GFP_KERNEL);
++	if (!mb)
++		return NULL;
++
++	/* allocate buffer that can be shared with secure world */
++	mb->buf_va = _alloc_shareable_mem(sz, GFP_KERNEL);
++	if (!mb->buf_va)
++		goto err_alloc;
++
++	sg_init_one(&mb->sg, mb->buf_va, sz);
++	ret = trusty_share_memory_compat(vds->vdev->dev.parent->parent,
++					 &mb->buf_id, &mb->sg, 1, pgprot);
++	if (ret) {
++		dev_err(&vds->vdev->dev, "trusty_share_memory failed: %d\n",
++			ret);
++		goto err_share;
++	}
++
++	mb->buf_sz = sz;
++	mb->shm_cnt = 0;
++
++	return mb;
++
++err_share:
++	_free_shareable_mem(sz, mb->buf_va);
++err_alloc:
++	kfree(mb);
++	return NULL;
++}
++
++static void vds_free_msg_buf(struct tipc_virtio_dev *vds,
++			     struct tipc_msg_buf *mb)
++{
++	int ret;
++
++	ret = trusty_reclaim_memory(vds->vdev->dev.parent->parent, mb->buf_id,
++				    &mb->sg, 1);
++	if (WARN_ON(ret)) {
++		dev_err(&vds->vdev->dev,
++			"trusty_revoke_memory failed: %d txbuf %lld\n",
++			ret, mb->buf_id);
++
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++	} else {
++		_free_shareable_mem(mb->buf_sz, mb->buf_va);
++	}
++	kfree(mb);
++}
++
++static void vds_free_msg_buf_list(struct tipc_virtio_dev *vds,
++				  struct list_head *list)
++{
++	struct tipc_msg_buf *mb = NULL;
++
++	mb = list_first_entry_or_null(list, struct tipc_msg_buf, node);
++	while (mb) {
++		list_del(&mb->node);
++		vds_free_msg_buf(vds, mb);
++		mb = list_first_entry_or_null(list, struct tipc_msg_buf, node);
++	}
++}
++
++static inline void mb_reset(struct tipc_msg_buf *mb)
++{
++	mb->wpos = 0;
++	mb->rpos = 0;
++}
++
++static inline void mb_reset_read(struct tipc_msg_buf *mb)
++{
++	mb->rpos = 0;
++}
++
++static void _free_vds(struct kref *kref)
++{
++	struct tipc_virtio_dev *vds =
++		container_of(kref, struct tipc_virtio_dev, refcount);
++	/*
++	 * If this WARN triggers, we're leaking remote memory references.
++	 *
++	 * No need to lock shared_handles_lock. All references to this lock
++	 * should already be gone by this point, since we are freeing it in this
++	 * function.
++	 */
++	WARN_ON(!RB_EMPTY_ROOT(&vds->shared_handles));
++	kfree(vds);
++}
++
++static void _free_chan(struct kref *kref)
++{
++	struct tipc_chan *ch = container_of(kref, struct tipc_chan, refcount);
++
++	if (ch->ops && ch->ops->handle_release)
++		ch->ops->handle_release(ch->ops_arg);
++
++	kref_put(&ch->vds->refcount, _free_vds);
++	kfree(ch);
++}
++
++static bool _put_txbuf_locked(struct tipc_virtio_dev *vds,
++			      struct tipc_msg_buf *mb)
++{
++	list_add_tail(&mb->node, &vds->free_buf_list);
++	return vds->free_msg_buf_cnt++ == 0;
++}
++
++static struct tipc_msg_buf *_get_txbuf_locked(struct tipc_virtio_dev *vds)
++{
++	struct tipc_msg_buf *mb;
++
++	if (vds->state != VDS_ONLINE)
++		return  ERR_PTR(-ENODEV);
++
++	if (vds->free_msg_buf_cnt) {
++		/* take it out of free list */
++		mb = list_first_entry(&vds->free_buf_list,
++				      struct tipc_msg_buf, node);
++		list_del(&mb->node);
++		mb->shm_cnt = 0;
++		vds->free_msg_buf_cnt--;
++	} else {
++		if (vds->msg_buf_cnt >= vds->msg_buf_max_cnt)
++			return ERR_PTR(-EAGAIN);
++
++		/* try to allocate it */
++		mb = vds_alloc_msg_buf(vds, false);
++		if (!mb)
++			return ERR_PTR(-ENOMEM);
++
++		vds->msg_buf_cnt++;
++	}
++	return mb;
++}
++
++static struct tipc_msg_buf *_vds_get_txbuf(struct tipc_virtio_dev *vds)
++{
++	struct tipc_msg_buf *mb;
++
++	mutex_lock(&vds->lock);
++	mb = _get_txbuf_locked(vds);
++	mutex_unlock(&vds->lock);
++
++	return mb;
++}
++
++static void vds_put_txbuf(struct tipc_virtio_dev *vds, struct tipc_msg_buf *mb)
++{
++	mutex_lock(&vds->lock);
++	_put_txbuf_locked(vds, mb);
++	wake_up_interruptible(&vds->sendq);
++	mutex_unlock(&vds->lock);
++}
++
++static struct tipc_msg_buf *vds_get_txbuf(struct tipc_virtio_dev *vds,
++					  long timeout)
++{
++	struct tipc_msg_buf *mb;
++
++	mb = _vds_get_txbuf(vds);
++
++	if ((PTR_ERR(mb) == -EAGAIN) && timeout) {
++		DEFINE_WAIT_FUNC(wait, woken_wake_function);
++
++		timeout = msecs_to_jiffies(timeout);
++		add_wait_queue(&vds->sendq, &wait);
++		for (;;) {
++			timeout = wait_woken(&wait, TASK_INTERRUPTIBLE,
++					     timeout);
++			if (!timeout) {
++				mb = ERR_PTR(-ETIMEDOUT);
++				break;
++			}
++
++			if (signal_pending(current)) {
++				mb = ERR_PTR(-ERESTARTSYS);
++				break;
++			}
++
++			mb = _vds_get_txbuf(vds);
++			if (PTR_ERR(mb) != -EAGAIN)
++				break;
++		}
++		remove_wait_queue(&vds->sendq, &wait);
++	}
++
++	if (IS_ERR(mb))
++		return mb;
++
++	if (WARN_ON(!mb))
++		return ERR_PTR(-EINVAL);
++
++	/* reset and reserve space for message header */
++	mb_reset(mb);
++	mb_put_data(mb, sizeof(struct tipc_msg_hdr));
++
++	return mb;
++}
++
++static int vds_queue_txbuf(struct tipc_virtio_dev *vds,
++			   struct tipc_msg_buf *mb)
++{
++	int err;
++	struct scatterlist sg;
++	bool need_notify = false;
++
++	mutex_lock(&vds->lock);
++	if (vds->state == VDS_ONLINE) {
++		sg_init_one(&sg, mb, mb->wpos);
++		err = virtqueue_add_outbuf(vds->txvq, &sg, 1, mb, GFP_KERNEL);
++		need_notify = virtqueue_kick_prepare(vds->txvq);
++	} else {
++		err = -ENODEV;
++	}
++	mutex_unlock(&vds->lock);
++
++	if (need_notify)
++		virtqueue_notify(vds->txvq);
++
++	return err;
++}
++
++static int vds_add_channel(struct tipc_virtio_dev *vds,
++			   struct tipc_chan *chan)
++{
++	int ret;
++
++	mutex_lock(&vds->lock);
++	if (vds->state == VDS_ONLINE) {
++		ret = idr_alloc(&vds->addr_idr, chan,
++				TIPC_MIN_LOCAL_ADDR, TIPC_ANY_ADDR - 1,
++				GFP_KERNEL);
++		if (ret > 0) {
++			chan->local = ret;
++			kref_get(&chan->refcount);
++			ret = 0;
++		}
++	} else {
++		ret = -EINVAL;
++	}
++	mutex_unlock(&vds->lock);
++
++	return ret;
++}
++
++static void vds_del_channel(struct tipc_virtio_dev *vds,
++			    struct tipc_chan *chan)
++{
++	mutex_lock(&vds->lock);
++	if (chan->local) {
++		idr_remove(&vds->addr_idr, chan->local);
++		chan->local = 0;
++		chan->remote = 0;
++		kref_put(&chan->refcount, _free_chan);
++	}
++	mutex_unlock(&vds->lock);
++}
++
++static struct tipc_chan *vds_lookup_channel(struct tipc_virtio_dev *vds,
++					    u32 addr)
++{
++	int id;
++	struct tipc_chan *chan = NULL;
++
++	mutex_lock(&vds->lock);
++	if (addr == TIPC_ANY_ADDR) {
++		id = idr_for_each(&vds->addr_idr, _match_any, NULL);
++		if (id > 0)
++			chan = idr_find(&vds->addr_idr, id);
++	} else {
++		chan = idr_find(&vds->addr_idr, addr);
++	}
++	if (chan)
++		kref_get(&chan->refcount);
++	mutex_unlock(&vds->lock);
++
++	return chan;
++}
++
++static struct tipc_chan *vds_create_channel(struct tipc_virtio_dev *vds,
++					    const struct tipc_chan_ops *ops,
++					    void *ops_arg)
++{
++	int ret;
++	struct tipc_chan *chan = NULL;
++
++	if (!vds)
++		return ERR_PTR(-ENOENT);
++
++	if (!ops)
++		return ERR_PTR(-EINVAL);
++
++	chan = kzalloc(sizeof(*chan), GFP_KERNEL);
++	if (!chan)
++		return ERR_PTR(-ENOMEM);
++
++	kref_get(&vds->refcount);
++	chan->vds = vds;
++	chan->ops = ops;
++	chan->ops_arg = ops_arg;
++	mutex_init(&chan->lock);
++	kref_init(&chan->refcount);
++	chan->state = TIPC_DISCONNECTED;
++
++	ret = vds_add_channel(vds, chan);
++	if (ret) {
++		kfree(chan);
++		kref_put(&vds->refcount, _free_vds);
++		return ERR_PTR(ret);
++	}
++
++	return chan;
++}
++
++static void fill_msg_hdr(struct tipc_msg_buf *mb, u32 src, u32 dst)
++{
++	struct tipc_msg_hdr *hdr = mb_get_data(mb, sizeof(*hdr));
++
++	hdr->src = src;
++	hdr->dst = dst;
++	hdr->len = mb_avail_data(mb);
++	hdr->flags = 0;
++	hdr->shm_cnt = mb->shm_cnt;
++	hdr->reserved = 0;
++}
++
++static int tipc_shared_handle_new(struct tipc_shared_handle **shared_handle,
++				  struct tipc_virtio_dev *vds)
++{
++	struct tipc_shared_handle *out = kzalloc(sizeof(*out), GFP_KERNEL);
++
++	if (!out)
++		return -ENOMEM;
++
++	out->vds = vds;
++	*shared_handle = out;
++
++	return 0;
++}
++
++static struct device *tipc_shared_handle_dev(struct tipc_shared_handle
++					     *shared_handle)
++{
++	return shared_handle->vds->vdev->dev.parent->parent;
++}
++
++static bool is_same_memory_region(struct tipc_shared_handle *h1,
++				  struct tipc_shared_handle *h2)
++{
++	return h1->tipc.obj_id == h2->tipc.obj_id &&
++			h1->tipc.size == h2->tipc.size &&
++			h1->tipc.tag == h2->tipc.tag &&
++			h1->dma_buf == h2->dma_buf &&
++			h1->shared == h2->shared;
++}
++
++static bool dma_buf_owns_shared_mem_id(struct tipc_shared_handle *h)
++{
++	/* h->shared is true only if dma_buf did not own an shared memory ID */
++	return !h->shared;
++}
++
++static void tipc_shared_handle_register(struct tipc_shared_handle
++					*new_handle)
++{
++	struct tipc_virtio_dev *vds = new_handle->vds;
++	struct rb_node **new;
++	struct rb_node *parent = NULL;
++
++	mutex_lock(&vds->shared_handles_lock);
++
++	new = &vds->shared_handles.rb_node;
++	while (*new) {
++		struct tipc_shared_handle *handle =
++			rb_entry(*new, struct tipc_shared_handle, node);
++		parent = *new;
++		/*
++		 * An obj_id can be registered multiple times if it's owned by a
++		 * dma_buf, because in this case we use the same obj_id across
++		 * multiple memory transfer operations.
++		 */
++		if (handle->tipc.obj_id == new_handle->tipc.obj_id) {
++			if (dma_buf_owns_shared_mem_id(new_handle)) {
++				WARN_ON(!is_same_memory_region(handle,
++							       new_handle));
++			} else {
++				WARN(1, "This handle is already registered");
++				goto already_registered;
++			}
++		}
++
++		if (handle->tipc.obj_id > new_handle->tipc.obj_id)
++			new = &((*new)->rb_left);
++		else
++			new = &((*new)->rb_right);
++	}
++
++	rb_link_node(&new_handle->node, parent, new);
++	rb_insert_color(&new_handle->node, &vds->shared_handles);
++
++already_registered:
++	mutex_unlock(&vds->shared_handles_lock);
++}
++
++static struct tipc_shared_handle *tipc_shared_handle_take(struct tipc_virtio_dev
++							  *vds,
++							  trusty_shared_mem_id_t
++							  obj_id)
++{
++	struct rb_node *node;
++	struct tipc_shared_handle *out = NULL;
++
++	mutex_lock(&vds->shared_handles_lock);
++
++	node = vds->shared_handles.rb_node;
++	while (node) {
++		struct tipc_shared_handle *handle =
++			rb_entry(node, struct tipc_shared_handle, node);
++		if (obj_id == handle->tipc.obj_id) {
++			rb_erase(node, &vds->shared_handles);
++			out = handle;
++			break;
++		} else if (obj_id < handle->tipc.obj_id) {
++			node = node->rb_left;
++		} else {
++			node = node->rb_right;
++		}
++	}
++
++	mutex_unlock(&vds->shared_handles_lock);
++
++	return out;
++}
++
++static int tipc_shared_handle_drop(struct tipc_shared_handle *shared_handle)
++{
++	int ret;
++	struct tipc_virtio_dev *vds = shared_handle->vds;
++	struct device *dev = tipc_shared_handle_dev(shared_handle);
++
++	if (shared_handle->shared) {
++		/*
++		 * If this warning fires, it means this shared handle was still
++		 * in the set of active handles. This shouldn't happen (calling
++		 * code should ensure it is out if the tree) but this serves as
++		 * an extra check before it is released.
++		 *
++		 * However, the take itself should clean this incorrect state up
++		 * by removing the handle from the tree.
++		 *
++		 * This warning is only applicable when registering a handle
++		 * multiple times is not allowed, i.e. when dma_buf doesn't own
++		 * the handle.
++		 */
++		WARN_ON(tipc_shared_handle_take(vds,
++						shared_handle->tipc.obj_id));
++
++		ret = trusty_reclaim_memory(dev,
++					    shared_handle->tipc.obj_id,
++					    shared_handle->sgt->sgl,
++					    shared_handle->sgt->orig_nents);
++		if (ret) {
++			/*
++			 * We can't safely release this, it may still be in
++			 * use outside Linux.
++			 */
++			dev_warn(dev, "Failed to drop handle, leaking...\n");
++			return ret;
++		}
++	}
++
++	if (shared_handle->sgt)
++		dma_buf_unmap_attachment(shared_handle->attach,
++					 shared_handle->sgt, DMA_BIDIRECTIONAL);
++	if (shared_handle->attach)
++		dma_buf_detach(shared_handle->dma_buf, shared_handle->attach);
++	if (shared_handle->dma_buf)
++		dma_buf_put(shared_handle->dma_buf);
++
++	kfree(shared_handle);
++
++	return 0;
++}
++
++/*****************************************************************************/
++
++struct tipc_chan *tipc_create_channel(struct device *dev,
++				      const struct tipc_chan_ops *ops,
++				      void *ops_arg)
++{
++	struct virtio_device *vd;
++	struct tipc_chan *chan;
++	struct tipc_virtio_dev *vds;
++
++	mutex_lock(&tipc_devices_lock);
++	if (dev) {
++		vd = container_of(dev, struct virtio_device, dev);
++	} else {
++		vd = default_vdev;
++		if (!vd) {
++			mutex_unlock(&tipc_devices_lock);
++			return ERR_PTR(-ENOENT);
++		}
++	}
++	vds = vd->priv;
++	kref_get(&vds->refcount);
++	mutex_unlock(&tipc_devices_lock);
++
++	chan = vds_create_channel(vds, ops, ops_arg);
++	kref_put(&vds->refcount, _free_vds);
++	return chan;
++}
++EXPORT_SYMBOL(tipc_create_channel);
++
++struct tipc_msg_buf *tipc_chan_get_rxbuf(struct tipc_chan *chan)
++{
++	return vds_alloc_msg_buf(chan->vds, true);
++}
++EXPORT_SYMBOL(tipc_chan_get_rxbuf);
++
++void tipc_chan_put_rxbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb)
++{
++	vds_free_msg_buf(chan->vds, mb);
++}
++EXPORT_SYMBOL(tipc_chan_put_rxbuf);
++
++struct tipc_msg_buf *tipc_chan_get_txbuf_timeout(struct tipc_chan *chan,
++						 long timeout)
++{
++	return vds_get_txbuf(chan->vds, timeout);
++}
++EXPORT_SYMBOL(tipc_chan_get_txbuf_timeout);
++
++void tipc_chan_put_txbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb)
++{
++	vds_put_txbuf(chan->vds, mb);
++}
++EXPORT_SYMBOL(tipc_chan_put_txbuf);
++
++int tipc_chan_queue_msg(struct tipc_chan *chan, struct tipc_msg_buf *mb)
++{
++	int err;
++
++	mutex_lock(&chan->lock);
++	switch (chan->state) {
++	case TIPC_CONNECTED:
++		fill_msg_hdr(mb, chan->local, chan->remote);
++		err = vds_queue_txbuf(chan->vds, mb);
++		if (err) {
++			/* this should never happen */
++			dev_err(&chan->vds->vdev->dev,
++				"%s: failed to queue tx buffer (%d)\n",
++			       __func__, err);
++		}
++		break;
++	case TIPC_DISCONNECTED:
++	case TIPC_CONNECTING:
++		err = -ENOTCONN;
++		break;
++	case TIPC_STALE:
++		err = -ESHUTDOWN;
++		break;
++	default:
++		err = -EBADFD;
++		dev_err(&chan->vds->vdev->dev,
++			"%s: unexpected channel state %d\n",
++			__func__, chan->state);
++	}
++	mutex_unlock(&chan->lock);
++	return err;
++}
++EXPORT_SYMBOL(tipc_chan_queue_msg);
++
++
++int tipc_chan_connect(struct tipc_chan *chan, const char *name)
++{
++	int err;
++	struct tipc_ctrl_msg *msg;
++	struct tipc_conn_req_body *body;
++	struct tipc_msg_buf *txbuf;
++
++	txbuf = vds_get_txbuf(chan->vds, TXBUF_TIMEOUT);
++	if (IS_ERR(txbuf))
++		return PTR_ERR(txbuf);
++
++	/* reserve space for connection request control message */
++	msg = mb_put_data(txbuf, sizeof(*msg) + sizeof(*body));
++	body = (struct tipc_conn_req_body *)msg->body;
++
++	/* fill message */
++	msg->type = TIPC_CTRL_MSGTYPE_CONN_REQ;
++	msg->body_len  = sizeof(*body);
++
++	strncpy(body->name, name, sizeof(body->name));
++	body->name[sizeof(body->name)-1] = '\0';
++
++	mutex_lock(&chan->lock);
++	switch (chan->state) {
++	case TIPC_DISCONNECTED:
++		/* save service name we are connecting to */
++		strcpy(chan->srv_name, body->name);
++
++		fill_msg_hdr(txbuf, chan->local, TIPC_CTRL_ADDR);
++		err = vds_queue_txbuf(chan->vds, txbuf);
++		if (err) {
++			/* this should never happen */
++			dev_err(&chan->vds->vdev->dev,
++				"%s: failed to queue tx buffer (%d)\n",
++				__func__, err);
++		} else {
++			chan->state = TIPC_CONNECTING;
++			txbuf = NULL; /* prevents discarding buffer */
++		}
++		break;
++	case TIPC_CONNECTED:
++	case TIPC_CONNECTING:
++		/* check if we are trying to connect to the same service */
++		if (strcmp(chan->srv_name, body->name) == 0)
++			err = 0;
++		else
++			if (chan->state == TIPC_CONNECTING)
++				err = -EALREADY; /* in progress */
++			else
++				err = -EISCONN;  /* already connected */
++		break;
++
++	case TIPC_STALE:
++		err = -ESHUTDOWN;
++		break;
++	default:
++		err = -EBADFD;
++		dev_err(&chan->vds->vdev->dev,
++			"%s: unexpected channel state %d\n",
++			__func__, chan->state);
++		break;
++	}
++	mutex_unlock(&chan->lock);
++
++	if (txbuf)
++		tipc_chan_put_txbuf(chan, txbuf); /* discard it */
++
++	return err;
++}
++EXPORT_SYMBOL(tipc_chan_connect);
++
++int tipc_chan_shutdown(struct tipc_chan *chan)
++{
++	int err;
++	struct tipc_ctrl_msg *msg;
++	struct tipc_disc_req_body *body;
++	struct tipc_msg_buf *txbuf = NULL;
++
++	/* get tx buffer */
++	txbuf = vds_get_txbuf(chan->vds, TXBUF_TIMEOUT);
++	if (IS_ERR(txbuf))
++		return PTR_ERR(txbuf);
++
++	mutex_lock(&chan->lock);
++	if (chan->state == TIPC_CONNECTED || chan->state == TIPC_CONNECTING) {
++		/* reserve space for disconnect request control message */
++		msg = mb_put_data(txbuf, sizeof(*msg) + sizeof(*body));
++		body = (struct tipc_disc_req_body *)msg->body;
++
++		msg->type = TIPC_CTRL_MSGTYPE_DISC_REQ;
++		msg->body_len = sizeof(*body);
++		body->target = chan->remote;
++
++		fill_msg_hdr(txbuf, chan->local, TIPC_CTRL_ADDR);
++		err = vds_queue_txbuf(chan->vds, txbuf);
++		if (err) {
++			/* this should never happen */
++			dev_err(&chan->vds->vdev->dev,
++				"%s: failed to queue tx buffer (%d)\n",
++				__func__, err);
++		}
++	} else {
++		err = -ENOTCONN;
++	}
++	chan->state = TIPC_STALE;
++	mutex_unlock(&chan->lock);
++
++	if (err) {
++		/* release buffer */
++		tipc_chan_put_txbuf(chan, txbuf);
++	}
++
++	return err;
++}
++EXPORT_SYMBOL(tipc_chan_shutdown);
++
++void tipc_chan_destroy(struct tipc_chan *chan)
++{
++	vds_del_channel(chan->vds, chan);
++	kref_put(&chan->refcount, _free_chan);
++}
++EXPORT_SYMBOL(tipc_chan_destroy);
++
++/***************************************************************************/
++
++struct tipc_dn_chan {
++	int state;
++	struct mutex lock; /* protects rx_msg_queue list and channel state */
++	struct tipc_chan *chan;
++	wait_queue_head_t readq;
++	struct completion reply_comp;
++	struct list_head rx_msg_queue;
++};
++
++static int dn_wait_for_reply(struct tipc_dn_chan *dn, int timeout)
++{
++	int ret;
++
++	ret = wait_for_completion_interruptible_timeout(&dn->reply_comp,
++					msecs_to_jiffies(timeout));
++	if (ret < 0)
++		return ret;
++
++	mutex_lock(&dn->lock);
++	if (!ret) {
++		/* no reply from remote */
++		dn->state = TIPC_STALE;
++		ret = -ETIMEDOUT;
++	} else {
++		/* got reply */
++		if (dn->state == TIPC_CONNECTED)
++			ret = 0;
++		else if (dn->state == TIPC_DISCONNECTED)
++			if (!list_empty(&dn->rx_msg_queue))
++				ret = 0;
++			else
++				ret = -ENOTCONN;
++		else
++			ret = -EIO;
++	}
++	mutex_unlock(&dn->lock);
++
++	return ret;
++}
++
++static struct tipc_msg_buf *dn_handle_msg(void *data,
++					  struct tipc_msg_buf *rxbuf)
++{
++	struct tipc_dn_chan *dn = data;
++	struct tipc_msg_buf *newbuf = rxbuf;
++
++	mutex_lock(&dn->lock);
++	if (dn->state == TIPC_CONNECTED) {
++		/* get new buffer */
++		newbuf = tipc_chan_get_rxbuf(dn->chan);
++		if (newbuf) {
++			/* queue an old buffer and return a new one */
++			list_add_tail(&rxbuf->node, &dn->rx_msg_queue);
++			wake_up_interruptible(&dn->readq);
++		} else {
++			/*
++			 * return an old buffer effectively discarding
++			 * incoming message
++			 */
++			dev_err(&dn->chan->vds->vdev->dev,
++				"%s: discard incoming message\n", __func__);
++			newbuf = rxbuf;
++		}
++	}
++	mutex_unlock(&dn->lock);
++
++	return newbuf;
++}
++
++static void dn_connected(struct tipc_dn_chan *dn)
++{
++	mutex_lock(&dn->lock);
++	dn->state = TIPC_CONNECTED;
++
++	/* complete all pending  */
++	complete(&dn->reply_comp);
++
++	mutex_unlock(&dn->lock);
++}
++
++static void dn_disconnected(struct tipc_dn_chan *dn)
++{
++	mutex_lock(&dn->lock);
++	dn->state = TIPC_DISCONNECTED;
++
++	/* complete all pending  */
++	complete(&dn->reply_comp);
++
++	/* wakeup all readers */
++	wake_up_interruptible_all(&dn->readq);
++
++	mutex_unlock(&dn->lock);
++}
++
++static void dn_shutdown(struct tipc_dn_chan *dn)
++{
++	mutex_lock(&dn->lock);
++
++	/* set state to STALE */
++	dn->state = TIPC_STALE;
++
++	/* complete all pending  */
++	complete(&dn->reply_comp);
++
++	/* wakeup all readers */
++	wake_up_interruptible_all(&dn->readq);
++
++	mutex_unlock(&dn->lock);
++}
++
++static void dn_handle_event(void *data, int event)
++{
++	struct tipc_dn_chan *dn = data;
++
++	switch (event) {
++	case TIPC_CHANNEL_SHUTDOWN:
++		dn_shutdown(dn);
++		break;
++
++	case TIPC_CHANNEL_DISCONNECTED:
++		dn_disconnected(dn);
++		break;
++
++	case TIPC_CHANNEL_CONNECTED:
++		dn_connected(dn);
++		break;
++
++	default:
++		dev_err(&dn->chan->vds->vdev->dev,
++			"%s: unhandled event %d\n", __func__, event);
++		break;
++	}
++}
++
++static void dn_handle_release(void *data)
++{
++	kfree(data);
++}
++
++static const struct tipc_chan_ops _dn_ops = {
++	.handle_msg = dn_handle_msg,
++	.handle_event = dn_handle_event,
++	.handle_release = dn_handle_release,
++};
++
++#define cdev_to_cdn(c) container_of((c), struct tipc_cdev_node, cdev)
++#define cdn_to_vds(cdn) container_of((cdn), struct tipc_virtio_dev, cdev_node)
++
++static struct tipc_virtio_dev *_dn_lookup_vds(struct tipc_cdev_node *cdn)
++{
++	int ret;
++	struct tipc_virtio_dev *vds = NULL;
++
++	mutex_lock(&tipc_devices_lock);
++	ret = idr_for_each(&tipc_devices, _match_data, cdn);
++	if (ret) {
++		vds = cdn_to_vds(cdn);
++		kref_get(&vds->refcount);
++	}
++	mutex_unlock(&tipc_devices_lock);
++	return vds;
++}
++
++static int tipc_open(struct inode *inode, struct file *filp)
++{
++	int ret;
++	struct tipc_virtio_dev *vds;
++	struct tipc_dn_chan *dn;
++	struct tipc_cdev_node *cdn = cdev_to_cdn(inode->i_cdev);
++
++	vds = _dn_lookup_vds(cdn);
++	if (!vds) {
++		ret = -ENOENT;
++		goto err_vds_lookup;
++	}
++
++	dn = kzalloc(sizeof(*dn), GFP_KERNEL);
++	if (!dn) {
++		ret = -ENOMEM;
++		goto err_alloc_chan;
++	}
++
++	mutex_init(&dn->lock);
++	init_waitqueue_head(&dn->readq);
++	init_completion(&dn->reply_comp);
++	INIT_LIST_HEAD(&dn->rx_msg_queue);
++
++	dn->state = TIPC_DISCONNECTED;
++
++	dn->chan = vds_create_channel(vds, &_dn_ops, dn);
++	if (IS_ERR(dn->chan)) {
++		ret = PTR_ERR(dn->chan);
++		goto err_create_chan;
++	}
++
++	filp->private_data = dn;
++	kref_put(&vds->refcount, _free_vds);
++	return 0;
++
++err_create_chan:
++	kfree(dn);
++err_alloc_chan:
++	kref_put(&vds->refcount, _free_vds);
++err_vds_lookup:
++	return ret;
++}
++
++
++static int dn_connect_ioctl(struct tipc_dn_chan *dn, char __user *usr_name)
++{
++	int ret;
++	char name[MAX_SRV_NAME_LEN];
++
++	/* copy in service name from user space */
++	ret = strncpy_from_user(name, usr_name, sizeof(name));
++	if (ret < 0)
++		return ret;
++	if (ret == sizeof(name))
++		return -ENAMETOOLONG;
++
++	/* send connect request */
++	ret = tipc_chan_connect(dn->chan, name);
++	if (ret)
++		return ret;
++
++	/* and wait for reply */
++	return dn_wait_for_reply(dn, REPLY_TIMEOUT);
++}
++
++static int dn_share_fd(struct tipc_dn_chan *dn, int fd,
++		       enum transfer_kind transfer_kind,
++		       struct tipc_shared_handle **out)
++{
++	int ret = 0;
++	struct tipc_shared_handle *shared_handle = NULL;
++	struct file *file = NULL;
++	struct device *dev = &dn->chan->vds->vdev->dev;
++	bool writable = false;
++	pgprot_t prot;
++	u64 tag = 0;
++	trusty_shared_mem_id_t mem_id;
++	bool lend;
++
++	if (dn->state != TIPC_CONNECTED) {
++		dev_dbg(dev, "Tried to share fd while not connected\n");
++		return -ENOTCONN;
++	}
++
++	file = fget(fd);
++	if (!file) {
++		dev_dbg(dev, "Invalid fd (%d)\n", fd);
++		return -EBADF;
++	}
++
++	if (!(file->f_mode & FMODE_READ)) {
++		dev_dbg(dev, "Cannot create write-only mapping\n");
++		fput(file);
++		return -EACCES;
++	}
++
++	writable = file->f_mode & FMODE_WRITE;
++	prot = writable ? PAGE_KERNEL : PAGE_KERNEL_RO;
++	fput(file);
++	file = NULL;
++
++	ret = tipc_shared_handle_new(&shared_handle, dn->chan->vds);
++	if (ret)
++		return ret;
++
++	shared_handle->dma_buf = dma_buf_get(fd);
++	if (IS_ERR(shared_handle->dma_buf)) {
++		ret = PTR_ERR(shared_handle->dma_buf);
++		shared_handle->dma_buf = NULL;
++		dev_dbg(dev, "Unable to get dma buf from fd (%d)\n", ret);
++		goto cleanup_handle;
++	}
++
++	tag = trusty_dma_buf_get_ffa_tag(shared_handle->dma_buf);
++	ret = trusty_dma_buf_get_shared_mem_id(shared_handle->dma_buf, &mem_id);
++	/*
++	 * Buffers with a preallocated mem_id should only be sent to Trusty
++	 * using TRUSTY_SEND_SECURE. And conversely, TRUSTY_SEND_SECURE should
++	 * only be used to send buffers with preallcoated mem_id.
++	 */
++	if (!ret) {
++		/* Use shared memory ID owned by dma_buf */
++		/* TODO: Enforce transfer_kind == TRUSTY_SEND_SECURE */
++		WARN_ONCE(transfer_kind != TRUSTY_SEND_SECURE,
++			  "Use TRUSTY_SEND_SECURE instead");
++		goto mem_id_allocated;
++	}
++
++	if (ret != -ENODATA) {
++		dev_err(dev, "dma_buf can't be transferred (%d)\n", ret);
++		goto cleanup_handle;
++	}
++
++	if (transfer_kind == TRUSTY_SEND_SECURE) {
++		dev_err(dev, "No mem ID for TRUSTY_SEND_SECURE\n");
++		goto cleanup_handle;
++	}
++	lend = (transfer_kind == TRUSTY_LEND);
++
++	shared_handle->attach = dma_buf_attach(shared_handle->dma_buf, dev);
++	if (IS_ERR(shared_handle->attach)) {
++		ret = PTR_ERR(shared_handle->attach);
++		shared_handle->attach = NULL;
++		dev_dbg(dev, "Unable to attach to dma_buf (%d)\n", ret);
++		goto cleanup_handle;
++	}
++
++	shared_handle->sgt = dma_buf_map_attachment(shared_handle->attach,
++						    DMA_BIDIRECTIONAL);
++	if (IS_ERR(shared_handle->sgt)) {
++		ret = PTR_ERR(shared_handle->sgt);
++		shared_handle->sgt = NULL;
++		dev_dbg(dev, "Failed to match attachment (%d)\n", ret);
++		goto cleanup_handle;
++	}
++
++	ret = trusty_transfer_memory(tipc_shared_handle_dev(shared_handle),
++				     &mem_id, shared_handle->sgt->sgl,
++				     shared_handle->sgt->orig_nents, prot, tag,
++				     lend);
++
++	if (ret < 0) {
++		dev_dbg(dev, "Transferring memory failed: %d\n", ret);
++		/*
++		 * The handle now has a sgt containing the pages, so we no
++		 * longer need to clean up the pages directly.
++		 */
++		goto cleanup_handle;
++	}
++	shared_handle->shared = true;
++
++mem_id_allocated:
++	shared_handle->tipc.obj_id = mem_id;
++	shared_handle->tipc.size = shared_handle->dma_buf->size;
++	shared_handle->tipc.tag = tag;
++	*out = shared_handle;
++	return 0;
++
++cleanup_handle:
++	tipc_shared_handle_drop(shared_handle);
++	return ret;
++}
++
++static ssize_t txbuf_write_iter(struct tipc_msg_buf *txbuf,
++				struct iov_iter *iter)
++{
++	size_t len;
++	/* message length */
++	len = iov_iter_count(iter);
++
++	/* check available space */
++	if (len > mb_avail_space(txbuf))
++		return -EMSGSIZE;
++
++	/* copy in message data */
++	if (copy_from_iter(mb_put_data(txbuf, len), len, iter) != len)
++		return -EFAULT;
++
++	return len;
++}
++
++static ssize_t txbuf_write_handles(struct tipc_msg_buf *txbuf,
++				   struct tipc_shared_handle **shm_handles,
++				   size_t shm_cnt)
++{
++	size_t idx;
++
++	/* message length */
++	size_t len = shm_cnt * sizeof(struct tipc_shm);
++
++	/* check available space */
++	if (len > mb_avail_space(txbuf))
++		return -EMSGSIZE;
++
++	/* copy over handles */
++	for (idx = 0; idx < shm_cnt; idx++) {
++		memcpy(mb_put_data(txbuf, sizeof(struct tipc_shm)),
++		       &shm_handles[idx]->tipc,
++		       sizeof(struct tipc_shm));
++	}
++
++	txbuf->shm_cnt += shm_cnt;
++
++	return len;
++}
++
++static long filp_send_ioctl(struct file *filp,
++			    const struct tipc_send_msg_req __user *arg)
++{
++	struct tipc_send_msg_req req;
++	struct iovec fast_iovs[UIO_FASTIOV];
++	struct iovec *iov = fast_iovs;
++	struct iov_iter iter;
++	struct trusty_shm *shm = NULL;
++	struct tipc_shared_handle **shm_handles = NULL;
++	int shm_idx = 0;
++	int release_idx;
++	struct tipc_dn_chan *dn = filp->private_data;
++	struct tipc_virtio_dev *vds = dn->chan->vds;
++	struct device *dev = &vds->vdev->dev;
++	long timeout = TXBUF_TIMEOUT;
++	struct tipc_msg_buf *txbuf = NULL;
++	long ret = 0;
++	ssize_t data_len = 0;
++	ssize_t shm_len = 0;
++
++	if (copy_from_user(&req, arg, sizeof(req)))
++		return -EFAULT;
++
++	if (req.shm_cnt > U16_MAX)
++		return -E2BIG;
++
++	shm = kmalloc_array(req.shm_cnt, sizeof(*shm), GFP_KERNEL);
++	if (!shm)
++		return -ENOMEM;
++
++	shm_handles = kmalloc_array(req.shm_cnt, sizeof(*shm_handles),
++				    GFP_KERNEL);
++	if (!shm_handles) {
++		ret = -ENOMEM;
++		goto shm_handles_alloc_failed;
++	}
++
++	if (copy_from_user(shm, u64_to_user_ptr(req.shm),
++			   req.shm_cnt * sizeof(struct trusty_shm))) {
++		ret = -EFAULT;
++		goto load_shm_args_failed;
++	}
++
++	ret = import_iovec(READ, u64_to_user_ptr(req.iov), req.iov_cnt,
++			   ARRAY_SIZE(fast_iovs), &iov, &iter);
++	if (ret < 0) {
++		dev_dbg(dev, "Failed to import iovec\n");
++		goto iov_import_failed;
++	}
++
++	for (shm_idx = 0; shm_idx < req.shm_cnt; shm_idx++) {
++		switch (shm[shm_idx].transfer) {
++		case TRUSTY_SHARE:
++		case TRUSTY_LEND:
++		case TRUSTY_SEND_SECURE:
++			break;
++		default:
++			dev_err(dev, "Unknown transfer type: 0x%x\n",
++				shm[shm_idx].transfer);
++			goto shm_share_failed;
++		}
++		ret = dn_share_fd(dn, shm[shm_idx].fd, shm[shm_idx].transfer,
++				  &shm_handles[shm_idx]);
++		if (ret) {
++			dev_dbg(dev, "Forwarding memory failed\n"
++				);
++			goto shm_share_failed;
++		}
++	}
++
++	if (filp->f_flags & O_NONBLOCK)
++		timeout = 0;
++
++	txbuf = tipc_chan_get_txbuf_timeout(dn->chan, timeout);
++	if (IS_ERR(txbuf)) {
++		dev_dbg(dev, "Failed to get txbuffer\n");
++		ret = PTR_ERR(txbuf);
++		goto get_txbuf_failed;
++	}
++
++	data_len = txbuf_write_iter(txbuf, &iter);
++	if (data_len < 0) {
++		ret = data_len;
++		goto txbuf_write_failed;
++	}
++
++	shm_len = txbuf_write_handles(txbuf, shm_handles, req.shm_cnt);
++	if (shm_len < 0) {
++		ret = shm_len;
++		goto txbuf_write_failed;
++	}
++
++	/*
++	 * These need to be aded to the index before queueing the message.
++	 * As soon as the message is sent, we may receive a message back from
++	 * Trusty saying it's no longer in use, and the shared_handle needs
++	 * to be there when that happens.
++	 */
++	for (shm_idx = 0; shm_idx < req.shm_cnt; shm_idx++)
++		tipc_shared_handle_register(shm_handles[shm_idx]);
++
++	ret = tipc_chan_queue_msg(dn->chan, txbuf);
++
++	if (ret)
++		goto queue_failed;
++
++	ret = data_len;
++
++common_cleanup:
++	kfree(iov);
++iov_import_failed:
++load_shm_args_failed:
++	kfree(shm_handles);
++shm_handles_alloc_failed:
++	kfree(shm);
++	return ret;
++
++queue_failed:
++	for (release_idx = 0; release_idx < req.shm_cnt; release_idx++)
++		tipc_shared_handle_take(vds,
++					shm_handles[release_idx]->tipc.obj_id);
++txbuf_write_failed:
++	tipc_chan_put_txbuf(dn->chan, txbuf);
++get_txbuf_failed:
++shm_share_failed:
++	for (shm_idx--; shm_idx >= 0; shm_idx--)
++		tipc_shared_handle_drop(shm_handles[shm_idx]);
++	goto common_cleanup;
++}
++
++static long tipc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
++{
++	struct tipc_dn_chan *dn = filp->private_data;
++
++	switch (cmd) {
++	case TIPC_IOC_CONNECT:
++		return dn_connect_ioctl(dn, (char __user *)arg);
++	case TIPC_IOC_SEND_MSG:
++		return filp_send_ioctl(filp,
++				       (const struct tipc_send_msg_req __user *)
++				       arg);
++	default:
++		dev_dbg(&dn->chan->vds->vdev->dev,
++			"Unhandled ioctl cmd: 0x%x\n", cmd);
++		return -ENOTTY;
++	}
++}
++
++#ifdef CONFIG_COMPAT
++static long tipc_compat_ioctl(struct file *filp,
++			      unsigned int cmd, unsigned long arg)
++{
++	struct tipc_dn_chan *dn = filp->private_data;
++
++	switch (cmd) {
++	case TIPC_IOC32_CONNECT:
++		cmd = TIPC_IOC_CONNECT;
++		break;
++	default:
++		dev_dbg(&dn->chan->vds->vdev->dev,
++			"Unhandled compat ioctl command: 0x%x\n", cmd);
++		return -ENOTTY;
++	}
++	return tipc_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
++}
++#endif
++
++static inline bool _got_rx(struct tipc_dn_chan *dn)
++{
++	if (dn->state != TIPC_CONNECTED)
++		return true;
++
++	if (!list_empty(&dn->rx_msg_queue))
++		return true;
++
++	return false;
++}
++
++static ssize_t tipc_read_iter(struct kiocb *iocb, struct iov_iter *iter)
++{
++	ssize_t ret;
++	size_t len;
++	struct tipc_msg_buf *mb;
++	struct file *filp = iocb->ki_filp;
++	struct tipc_dn_chan *dn = filp->private_data;
++
++	mutex_lock(&dn->lock);
++
++	while (list_empty(&dn->rx_msg_queue)) {
++		if (dn->state != TIPC_CONNECTED) {
++			if (dn->state == TIPC_CONNECTING)
++				ret = -ENOTCONN;
++			else if (dn->state == TIPC_DISCONNECTED)
++				ret = -ENOTCONN;
++			else if (dn->state == TIPC_STALE)
++				ret = -ESHUTDOWN;
++			else
++				ret = -EBADFD;
++			goto out;
++		}
++
++		mutex_unlock(&dn->lock);
++
++		if (filp->f_flags & O_NONBLOCK)
++			return -EAGAIN;
++
++		if (wait_event_interruptible(dn->readq, _got_rx(dn)))
++			return -ERESTARTSYS;
++
++		mutex_lock(&dn->lock);
++	}
++
++	mb = list_first_entry(&dn->rx_msg_queue, struct tipc_msg_buf, node);
++
++	len = mb_avail_data(mb);
++	if (len > iov_iter_count(iter)) {
++		ret = -EMSGSIZE;
++		goto out;
++	}
++
++	if (copy_to_iter(mb_get_data(mb, len), len, iter) != len) {
++		ret = -EFAULT;
++		goto out;
++	}
++
++	ret = len;
++	list_del(&mb->node);
++	tipc_chan_put_rxbuf(dn->chan, mb);
++
++out:
++	mutex_unlock(&dn->lock);
++	return ret;
++}
++
++static ssize_t tipc_write_iter(struct kiocb *iocb, struct iov_iter *iter)
++{
++	struct file *filp = iocb->ki_filp;
++	struct tipc_dn_chan *dn = filp->private_data;
++	long timeout = TXBUF_TIMEOUT;
++	struct tipc_msg_buf *txbuf = NULL;
++	ssize_t ret = 0;
++	ssize_t len = 0;
++
++	if (filp->f_flags & O_NONBLOCK)
++		timeout = 0;
++
++	txbuf = tipc_chan_get_txbuf_timeout(dn->chan, timeout);
++
++	if (IS_ERR(txbuf))
++		return PTR_ERR(txbuf);
++
++	len = txbuf_write_iter(txbuf, iter);
++	if (len < 0)
++		goto err_out;
++
++	/* queue message */
++	ret = tipc_chan_queue_msg(dn->chan, txbuf);
++	if (ret)
++		goto err_out;
++
++	return len;
++
++err_out:
++	tipc_chan_put_txbuf(dn->chan, txbuf);
++	return ret;
++}
++
++static __poll_t tipc_poll(struct file *filp, poll_table *wait)
++{
++	__poll_t mask = 0;
++	struct tipc_dn_chan *dn = filp->private_data;
++
++	mutex_lock(&dn->lock);
++
++	poll_wait(filp, &dn->readq, wait);
++
++	/* Writes always succeed for now */
++	mask |= EPOLLOUT | EPOLLWRNORM;
++
++	if (!list_empty(&dn->rx_msg_queue))
++		mask |= EPOLLIN | EPOLLRDNORM;
++
++	if (dn->state != TIPC_CONNECTED)
++		mask |= EPOLLERR;
++
++	mutex_unlock(&dn->lock);
++	return mask;
++}
++
++
++static int tipc_release(struct inode *inode, struct file *filp)
++{
++	struct tipc_dn_chan *dn = filp->private_data;
++
++	dn_shutdown(dn);
++
++	/* free all pending buffers */
++	vds_free_msg_buf_list(dn->chan->vds, &dn->rx_msg_queue);
++
++	/* shutdown channel  */
++	tipc_chan_shutdown(dn->chan);
++
++	/* and destroy it */
++	tipc_chan_destroy(dn->chan);
++
++	return 0;
++}
++
++static const struct file_operations tipc_fops = {
++	.open		= tipc_open,
++	.release	= tipc_release,
++	.unlocked_ioctl	= tipc_ioctl,
++#ifdef CONFIG_COMPAT
++	.compat_ioctl	= tipc_compat_ioctl,
++#endif
++	.read_iter	= tipc_read_iter,
++	.write_iter	= tipc_write_iter,
++	.poll		= tipc_poll,
++	.owner		= THIS_MODULE,
++};
++
++/*****************************************************************************/
++
++static void chan_trigger_event(struct tipc_chan *chan, int event)
++{
++	if (!event)
++		return;
++
++	chan->ops->handle_event(chan->ops_arg, event);
++}
++
++static void _cleanup_vq(struct tipc_virtio_dev *vds, struct virtqueue *vq)
++{
++	struct tipc_msg_buf *mb;
++
++	while ((mb = virtqueue_detach_unused_buf(vq)) != NULL)
++		vds_free_msg_buf(vds, mb);
++}
++
++static int _create_cdev_node(struct device *parent,
++			     struct tipc_cdev_node *cdn,
++			     const char *name)
++{
++	int ret;
++	dev_t devt;
++
++	if (!name) {
++		dev_dbg(parent, "%s: cdev name has to be provided\n",
++			__func__);
++		return -EINVAL;
++	}
++
++	/* allocate minor */
++	ret = idr_alloc(&tipc_devices, cdn, 0, MAX_DEVICES, GFP_KERNEL);
++	if (ret < 0) {
++		dev_dbg(parent, "%s: failed (%d) to get id\n",
++			__func__, ret);
++		return ret;
++	}
++
++	cdn->minor = ret;
++	cdev_init(&cdn->cdev, &tipc_fops);
++	cdn->cdev.owner = THIS_MODULE;
++
++	/* Add character device */
++	devt = MKDEV(tipc_major, cdn->minor);
++	ret = cdev_add(&cdn->cdev, devt, 1);
++	if (ret) {
++		dev_dbg(parent, "%s: cdev_add failed (%d)\n",
++			__func__, ret);
++		goto err_add_cdev;
++	}
++
++	/* Create a device node */
++	cdn->dev = device_create(tipc_class, parent,
++				 devt, NULL, "trusty-ipc-%s", name);
++	if (IS_ERR(cdn->dev)) {
++		ret = PTR_ERR(cdn->dev);
++		dev_dbg(parent, "%s: device_create failed: %d\n",
++			__func__, ret);
++		goto err_device_create;
++	}
++
++	return 0;
++
++err_device_create:
++	cdn->dev = NULL;
++	cdev_del(&cdn->cdev);
++err_add_cdev:
++	idr_remove(&tipc_devices, cdn->minor);
++	return ret;
++}
++
++static void create_cdev_node(struct tipc_virtio_dev *vds,
++			     struct tipc_cdev_node *cdn)
++{
++	int err;
++
++	mutex_lock(&tipc_devices_lock);
++
++	if (!default_vdev) {
++		kref_get(&vds->refcount);
++		default_vdev = vds->vdev;
++	}
++
++	if (vds->cdev_name[0] && !cdn->dev) {
++		kref_get(&vds->refcount);
++		err = _create_cdev_node(&vds->vdev->dev, cdn, vds->cdev_name);
++		if (err) {
++			dev_err(&vds->vdev->dev,
++				"failed (%d) to create cdev node\n", err);
++			kref_put(&vds->refcount, _free_vds);
++		}
++	}
++	mutex_unlock(&tipc_devices_lock);
++}
++
++static void destroy_cdev_node(struct tipc_virtio_dev *vds,
++			      struct tipc_cdev_node *cdn)
++{
++	mutex_lock(&tipc_devices_lock);
++	if (cdn->dev) {
++		device_destroy(tipc_class, MKDEV(tipc_major, cdn->minor));
++		cdev_del(&cdn->cdev);
++		idr_remove(&tipc_devices, cdn->minor);
++		cdn->dev = NULL;
++		kref_put(&vds->refcount, _free_vds);
++	}
++
++	if (default_vdev == vds->vdev) {
++		default_vdev = NULL;
++		kref_put(&vds->refcount, _free_vds);
++	}
++
++	mutex_unlock(&tipc_devices_lock);
++}
++
++static void _go_online(struct tipc_virtio_dev *vds)
++{
++	mutex_lock(&vds->lock);
++	if (vds->state == VDS_OFFLINE)
++		vds->state = VDS_ONLINE;
++	mutex_unlock(&vds->lock);
++
++	create_cdev_node(vds, &vds->cdev_node);
++
++	dev_info(&vds->vdev->dev, "is online\n");
++}
++
++static void _go_offline(struct tipc_virtio_dev *vds)
++{
++	struct tipc_chan *chan;
++
++	/* change state to OFFLINE */
++	mutex_lock(&vds->lock);
++	if (vds->state != VDS_ONLINE) {
++		mutex_unlock(&vds->lock);
++		return;
++	}
++	vds->state = VDS_OFFLINE;
++	mutex_unlock(&vds->lock);
++
++	/* wakeup all waiters */
++	wake_up_interruptible_all(&vds->sendq);
++
++	/* shutdown all channels */
++	while ((chan = vds_lookup_channel(vds, TIPC_ANY_ADDR))) {
++		mutex_lock(&chan->lock);
++		chan->state = TIPC_STALE;
++		chan->remote = 0;
++		chan_trigger_event(chan, TIPC_CHANNEL_SHUTDOWN);
++		mutex_unlock(&chan->lock);
++		kref_put(&chan->refcount, _free_chan);
++	}
++
++	/* shutdown device node */
++	destroy_cdev_node(vds, &vds->cdev_node);
++
++	dev_info(&vds->vdev->dev, "is offline\n");
++}
++
++static void _handle_conn_rsp(struct tipc_virtio_dev *vds,
++			     struct tipc_conn_rsp_body *rsp, size_t len)
++{
++	struct tipc_chan *chan;
++
++	if (sizeof(*rsp) != len) {
++		dev_err(&vds->vdev->dev, "%s: Invalid response length %zd\n",
++			__func__, len);
++		return;
++	}
++
++	dev_dbg(&vds->vdev->dev,
++		"%s: connection response: for addr 0x%x: status %d remote addr 0x%x\n",
++		__func__, rsp->target, rsp->status, rsp->remote);
++
++	/* Lookup channel */
++	chan = vds_lookup_channel(vds, rsp->target);
++	if (chan) {
++		mutex_lock(&chan->lock);
++		if (chan->state == TIPC_CONNECTING) {
++			if (!rsp->status) {
++				chan->state = TIPC_CONNECTED;
++				chan->remote = rsp->remote;
++				chan->max_msg_cnt = rsp->max_msg_cnt;
++				chan->max_msg_size = rsp->max_msg_size;
++				chan_trigger_event(chan,
++						   TIPC_CHANNEL_CONNECTED);
++			} else {
++				chan->state = TIPC_DISCONNECTED;
++				chan->remote = 0;
++				chan_trigger_event(chan,
++						   TIPC_CHANNEL_DISCONNECTED);
++			}
++		}
++		mutex_unlock(&chan->lock);
++		kref_put(&chan->refcount, _free_chan);
++	}
++}
++
++static void _handle_disc_req(struct tipc_virtio_dev *vds,
++			     struct tipc_disc_req_body *req, size_t len)
++{
++	struct tipc_chan *chan;
++
++	if (sizeof(*req) != len) {
++		dev_err(&vds->vdev->dev, "%s: Invalid request length %zd\n",
++			__func__, len);
++		return;
++	}
++
++	dev_dbg(&vds->vdev->dev, "%s: disconnect request: for addr 0x%x\n",
++		__func__, req->target);
++
++	chan = vds_lookup_channel(vds, req->target);
++	if (chan) {
++		mutex_lock(&chan->lock);
++		if (chan->state == TIPC_CONNECTED ||
++			chan->state == TIPC_CONNECTING) {
++			chan->state = TIPC_DISCONNECTED;
++			chan->remote = 0;
++			chan_trigger_event(chan, TIPC_CHANNEL_DISCONNECTED);
++		}
++		mutex_unlock(&chan->lock);
++		kref_put(&chan->refcount, _free_chan);
++	}
++}
++
++static void _handle_release(struct tipc_virtio_dev *vds,
++			    struct tipc_release_body *req, size_t len)
++{
++	struct tipc_shared_handle *handle = NULL;
++	struct device *dev = &vds->vdev->dev;
++	int ret = 0;
++
++	if (len < sizeof(*req)) {
++		dev_err(dev, "Received undersized release control message\n");
++		return;
++	}
++
++	handle = tipc_shared_handle_take(vds, req->id);
++	if (!handle) {
++		dev_err(dev,
++			"Received release control message for untracked handle: 0x%llx\n",
++			req->id);
++		return;
++	}
++
++	ret = tipc_shared_handle_drop(handle);
++
++	if (ret) {
++		dev_err(dev,
++			"Failed to release handle 0x%llx upon request: (%d)\n",
++			req->id, ret);
++		/*
++		 * Put the handle back in case we got a spurious release now and
++		 * get a real one later. This path should not happen, we're
++		 * just trying to be robust.
++		 */
++		tipc_shared_handle_register(handle);
++	}
++}
++
++static void _handle_ctrl_msg(struct tipc_virtio_dev *vds,
++			     void *data, int len, u32 src)
++{
++	struct tipc_ctrl_msg *msg = data;
++
++	if ((len < sizeof(*msg)) || (sizeof(*msg) + msg->body_len != len)) {
++		dev_err(&vds->vdev->dev,
++			"%s: Invalid message length ( %d vs. %d)\n",
++			__func__, (int)(sizeof(*msg) + msg->body_len), len);
++		return;
++	}
++
++	dev_dbg(&vds->vdev->dev,
++		"%s: Incoming ctrl message: src 0x%x type %d len %d\n",
++		__func__, src, msg->type, msg->body_len);
++
++	switch (msg->type) {
++	case TIPC_CTRL_MSGTYPE_GO_ONLINE:
++		_go_online(vds);
++		break;
++
++	case TIPC_CTRL_MSGTYPE_GO_OFFLINE:
++		_go_offline(vds);
++		break;
++
++	case TIPC_CTRL_MSGTYPE_CONN_RSP:
++		_handle_conn_rsp(vds, (struct tipc_conn_rsp_body *)msg->body,
++				 msg->body_len);
++		break;
++
++	case TIPC_CTRL_MSGTYPE_DISC_REQ:
++		_handle_disc_req(vds, (struct tipc_disc_req_body *)msg->body,
++				 msg->body_len);
++		break;
++
++	case TIPC_CTRL_MSGTYPE_RELEASE:
++		_handle_release(vds, (struct tipc_release_body *)msg->body,
++				msg->body_len);
++	break;
++
++	default:
++		dev_warn(&vds->vdev->dev,
++			 "%s: Unexpected message type: %d\n",
++			 __func__, msg->type);
++	}
++}
++
++static void handle_dropped_chan_msg(struct tipc_virtio_dev *vds,
++				    struct tipc_msg_buf *mb,
++				    struct tipc_msg_hdr *msg)
++{
++	int shm_idx;
++	struct tipc_shm *shm;
++	struct tipc_shared_handle *shared_handle;
++	struct device *dev = &vds->vdev->dev;
++	size_t len;
++
++	if (msg->len < msg->shm_cnt * sizeof(*shm)) {
++		dev_err(dev, "shm_cnt does not fit in dropped message");
++		/* The message is corrupt, so we can't recover resources */
++		return;
++	}
++
++	len = msg->len - msg->shm_cnt * sizeof(*shm);
++	/* skip normal data */
++	(void)mb_get_data(mb, len);
++
++	for (shm_idx = 0; shm_idx < msg->shm_cnt; shm_idx++) {
++		shm = mb_get_data(mb, sizeof(*shm));
++		shared_handle = tipc_shared_handle_take(vds, shm->obj_id);
++		if (shared_handle) {
++			if (tipc_shared_handle_drop(shared_handle))
++				dev_err(dev,
++					"Failed to drop handle found in dropped buffer");
++		} else {
++			dev_err(dev,
++				"Found handle in dropped buffer which was not registered to tipc device...");
++		}
++	}
++}
++
++static void handle_dropped_mb(struct tipc_virtio_dev *vds,
++			      struct tipc_msg_buf *mb)
++{
++	struct tipc_msg_hdr *msg;
++
++	mb_reset_read(mb);
++	msg = mb_get_data(mb, sizeof(*msg));
++	if (msg->dst != TIPC_CTRL_ADDR) {
++		handle_dropped_chan_msg(vds, mb, msg);
++	}
++}
++
++static int _handle_rxbuf(struct tipc_virtio_dev *vds,
++			 struct tipc_msg_buf *rxbuf, size_t rxlen)
++{
++	int err;
++	struct scatterlist sg;
++	struct tipc_msg_hdr *msg;
++	struct device *dev = &vds->vdev->dev;
++
++	/* message sanity check */
++	if (rxlen > rxbuf->buf_sz) {
++		dev_warn(dev, "inbound msg is too big: %zd\n", rxlen);
++		goto drop_it;
++	}
++
++	if (rxlen < sizeof(*msg)) {
++		dev_warn(dev, "inbound msg is too short: %zd\n", rxlen);
++		goto drop_it;
++	}
++
++	/* reset buffer and put data  */
++	mb_reset(rxbuf);
++	mb_put_data(rxbuf, rxlen);
++
++	/* get message header */
++	msg = mb_get_data(rxbuf, sizeof(*msg));
++	if (mb_avail_data(rxbuf) != msg->len) {
++		dev_warn(dev, "inbound msg length mismatch: (%zu vs. %d)\n",
++			 mb_avail_data(rxbuf), msg->len);
++		goto drop_it;
++	}
++
++	dev_dbg(dev, "From: %d, To: %d, Len: %d, Flags: 0x%x, Reserved: %d, shm_cnt: %d\n",
++		msg->src, msg->dst, msg->len, msg->flags, msg->reserved,
++		msg->shm_cnt);
++
++	/* message directed to control endpoint is a special case */
++	if (msg->dst == TIPC_CTRL_ADDR) {
++		_handle_ctrl_msg(vds, msg->data, msg->len, msg->src);
++	} else {
++		struct tipc_chan *chan = NULL;
++		/* Lookup channel */
++		chan = vds_lookup_channel(vds, msg->dst);
++		if (chan) {
++			/* handle it */
++			rxbuf = chan->ops->handle_msg(chan->ops_arg, rxbuf);
++			kref_put(&chan->refcount, _free_chan);
++			if (WARN_ON(!rxbuf))
++				return -EINVAL;
++		}
++	}
++
++drop_it:
++	/* add the buffer back to the virtqueue */
++	sg_init_one(&sg, rxbuf, rxbuf->buf_sz);
++	err = virtqueue_add_inbuf(vds->rxvq, &sg, 1, rxbuf, GFP_KERNEL);
++	if (err < 0) {
++		dev_err(dev, "failed to add a virtqueue buffer: %d\n", err);
++		return err;
++	}
++
++	return 0;
++}
++
++static void _rxvq_cb(struct virtqueue *rxvq)
++{
++	unsigned int len;
++	struct tipc_msg_buf *mb;
++	unsigned int msg_cnt = 0;
++	struct tipc_virtio_dev *vds = rxvq->vdev->priv;
++
++	while ((mb = virtqueue_get_buf(rxvq, &len)) != NULL) {
++		if (_handle_rxbuf(vds, mb, len))
++			break;
++		msg_cnt++;
++	}
++
++	/* tell the other size that we added rx buffers */
++	if (msg_cnt)
++		virtqueue_kick(rxvq);
++}
++
++static void _txvq_cb(struct virtqueue *txvq)
++{
++	unsigned int len;
++	struct tipc_msg_buf *mb;
++	bool need_wakeup = false;
++	struct tipc_virtio_dev *vds = txvq->vdev->priv;
++
++	/* detach all buffers */
++	mutex_lock(&vds->lock);
++	while ((mb = virtqueue_get_buf(txvq, &len)) != NULL) {
++		if ((int)len < 0)
++			handle_dropped_mb(vds, mb);
++		need_wakeup |= _put_txbuf_locked(vds, mb);
++	}
++	mutex_unlock(&vds->lock);
++
++	if (need_wakeup) {
++		/* wake up potential senders waiting for a tx buffer */
++		wake_up_interruptible_all(&vds->sendq);
++	}
++}
++
++static int tipc_virtio_probe(struct virtio_device *vdev)
++{
++	int err, i;
++	struct tipc_virtio_dev *vds;
++	struct tipc_dev_config config;
++	struct virtqueue *vqs[2];
++	vq_callback_t *vq_cbs[] = {_rxvq_cb, _txvq_cb};
++	static const char * const vq_names[] = { "rx", "tx" };
++
++	vds = kzalloc(sizeof(*vds), GFP_KERNEL);
++	if (!vds)
++		return -ENOMEM;
++
++	vds->vdev = vdev;
++
++	mutex_init(&vds->lock);
++	mutex_init(&vds->shared_handles_lock);
++	kref_init(&vds->refcount);
++	init_waitqueue_head(&vds->sendq);
++	INIT_LIST_HEAD(&vds->free_buf_list);
++	idr_init(&vds->addr_idr);
++	vds->shared_handles = RB_ROOT;
++	dma_coerce_mask_and_coherent(&vds->vdev->dev,
++				     *vds->vdev->dev.parent->parent->dma_mask);
++
++	/* set default max message size and alignment */
++	memset(&config, 0, sizeof(config));
++	config.msg_buf_max_size  = DEFAULT_MSG_BUF_SIZE;
++	config.msg_buf_alignment = DEFAULT_MSG_BUF_ALIGN;
++
++	/* get configuration if present */
++	vdev->config->get(vdev, 0, &config, sizeof(config));
++
++	/* copy dev name */
++	strncpy(vds->cdev_name, config.dev_name, sizeof(vds->cdev_name));
++	vds->cdev_name[sizeof(vds->cdev_name)-1] = '\0';
++
++	/* find tx virtqueues (rx and tx and in this order) */
++	err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, vq_names, NULL,
++				     NULL);
++	if (err)
++		goto err_find_vqs;
++
++	vds->rxvq = vqs[0];
++	vds->txvq = vqs[1];
++
++	/* save max buffer size and count */
++	vds->msg_buf_max_sz = config.msg_buf_max_size;
++	vds->msg_buf_max_cnt = virtqueue_get_vring_size(vds->txvq);
++
++	/* set up the receive buffers */
++	for (i = 0; i < virtqueue_get_vring_size(vds->rxvq); i++) {
++		struct scatterlist sg;
++		struct tipc_msg_buf *rxbuf;
++
++		rxbuf = vds_alloc_msg_buf(vds, true);
++		if (!rxbuf) {
++			dev_err(&vdev->dev, "failed to allocate rx buffer\n");
++			err = -ENOMEM;
++			goto err_free_rx_buffers;
++		}
++
++		sg_init_one(&sg, rxbuf, rxbuf->buf_sz);
++		err = virtqueue_add_inbuf(vds->rxvq, &sg, 1, rxbuf, GFP_KERNEL);
++		WARN_ON(err); /* sanity check; this can't really happen */
++	}
++
++	vdev->priv = vds;
++	vds->state = VDS_OFFLINE;
++
++	dev_dbg(&vdev->dev, "%s: done\n", __func__);
++	return 0;
++
++err_free_rx_buffers:
++	_cleanup_vq(vds, vds->rxvq);
++err_find_vqs:
++	kref_put(&vds->refcount, _free_vds);
++	return err;
++}
++
++static void tipc_virtio_remove(struct virtio_device *vdev)
++{
++	struct tipc_virtio_dev *vds = vdev->priv;
++
++	_go_offline(vds);
++
++	mutex_lock(&vds->lock);
++	vds->state = VDS_DEAD;
++	vds->vdev = NULL;
++	mutex_unlock(&vds->lock);
++
++	vdev->config->reset(vdev);
++
++	idr_destroy(&vds->addr_idr);
++
++	_cleanup_vq(vds, vds->rxvq);
++	_cleanup_vq(vds, vds->txvq);
++	vds_free_msg_buf_list(vds, &vds->free_buf_list);
++
++	vdev->config->del_vqs(vds->vdev);
++
++	kref_put(&vds->refcount, _free_vds);
++}
++
++static const struct virtio_device_id tipc_virtio_id_table[] = {
++	{ VIRTIO_ID_TRUSTY_IPC, VIRTIO_DEV_ANY_ID },
++	{ 0 },
++};
++
++static const unsigned int features[] = {
++	0,
++};
++
++static struct virtio_driver virtio_tipc_driver = {
++	.feature_table	= features,
++	.feature_table_size = ARRAY_SIZE(features),
++	.driver.name	= KBUILD_MODNAME,
++	.driver.owner	= THIS_MODULE,
++	.id_table	= tipc_virtio_id_table,
++	.probe		= tipc_virtio_probe,
++	.remove		= tipc_virtio_remove,
++};
++
++static int __init tipc_init(void)
++{
++	int ret;
++	dev_t dev;
++
++	ret = alloc_chrdev_region(&dev, 0, MAX_DEVICES, KBUILD_MODNAME);
++	if (ret) {
++		pr_err("%s: alloc_chrdev_region failed: %d\n", __func__, ret);
++		return ret;
++	}
++
++	tipc_major = MAJOR(dev);
++	tipc_class = class_create(THIS_MODULE, KBUILD_MODNAME);
++	if (IS_ERR(tipc_class)) {
++		ret = PTR_ERR(tipc_class);
++		pr_err("%s: class_create failed: %d\n", __func__, ret);
++		goto err_class_create;
++	}
++
++	ret = register_virtio_driver(&virtio_tipc_driver);
++	if (ret) {
++		pr_err("failed to register virtio driver: %d\n", ret);
++		goto err_register_virtio_drv;
++	}
++
++	return 0;
++
++err_register_virtio_drv:
++	class_destroy(tipc_class);
++
++err_class_create:
++	unregister_chrdev_region(dev, MAX_DEVICES);
++	return ret;
++}
++
++static void __exit tipc_exit(void)
++{
++	unregister_virtio_driver(&virtio_tipc_driver);
++	class_destroy(tipc_class);
++	unregister_chrdev_region(MKDEV(tipc_major, 0), MAX_DEVICES);
++}
++
++/* We need to init this early */
++subsys_initcall(tipc_init);
++module_exit(tipc_exit);
++
++MODULE_DEVICE_TABLE(tipc, tipc_virtio_id_table);
++MODULE_DESCRIPTION("Trusty IPC driver");
++MODULE_LICENSE("GPL v2");
+diff --git a/drivers/trusty/trusty-irq.c b/drivers/trusty/trusty-irq.c
+new file mode 100644
+index 000000000000..5c6076108d0e
+--- /dev/null
++++ b/drivers/trusty/trusty-irq.c
+@@ -0,0 +1,645 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2013 Google, Inc.
++ */
++
++#include <linux/cpu.h>
++#include <linux/interrupt.h>
++#include <linux/irq.h>
++#include <linux/irqdomain.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/sm_err.h>
++#include <linux/trusty/trusty.h>
++
++struct trusty_irq {
++	struct trusty_irq_state *is;
++	struct hlist_node node;
++	unsigned int irq;
++	bool percpu;
++	bool enable;
++	bool doorbell;
++	struct trusty_irq __percpu *percpu_ptr;
++};
++
++struct trusty_irq_irqset {
++	struct hlist_head pending;
++	struct hlist_head inactive;
++};
++
++struct trusty_irq_state {
++	struct device *dev;
++	struct device *trusty_dev;
++	struct trusty_irq_irqset normal_irqs;
++	spinlock_t normal_irqs_lock;
++	struct trusty_irq_irqset __percpu *percpu_irqs;
++	struct notifier_block trusty_call_notifier;
++	struct hlist_node cpuhp_node;
++};
++
++static int trusty_irq_cpuhp_slot = -1;
++
++static void trusty_irq_enable_pending_irqs(struct trusty_irq_state *is,
++					   struct trusty_irq_irqset *irqset,
++					   bool percpu)
++{
++	struct hlist_node *n;
++	struct trusty_irq *trusty_irq;
++
++	hlist_for_each_entry_safe(trusty_irq, n, &irqset->pending, node) {
++		dev_dbg(is->dev,
++			"%s: enable pending irq %d, percpu %d, cpu %d\n",
++			__func__, trusty_irq->irq, percpu, smp_processor_id());
++		if (percpu)
++			enable_percpu_irq(trusty_irq->irq, 0);
++		else
++			enable_irq(trusty_irq->irq);
++		hlist_del(&trusty_irq->node);
++		hlist_add_head(&trusty_irq->node, &irqset->inactive);
++	}
++}
++
++static void trusty_irq_enable_irqset(struct trusty_irq_state *is,
++				      struct trusty_irq_irqset *irqset)
++{
++	struct trusty_irq *trusty_irq;
++
++	hlist_for_each_entry(trusty_irq, &irqset->inactive, node) {
++		if (trusty_irq->enable) {
++			dev_warn(is->dev,
++				 "%s: percpu irq %d already enabled, cpu %d\n",
++				 __func__, trusty_irq->irq, smp_processor_id());
++			continue;
++		}
++		dev_dbg(is->dev, "%s: enable percpu irq %d, cpu %d\n",
++			__func__, trusty_irq->irq, smp_processor_id());
++		enable_percpu_irq(trusty_irq->irq, 0);
++		trusty_irq->enable = true;
++	}
++}
++
++static void trusty_irq_disable_irqset(struct trusty_irq_state *is,
++				      struct trusty_irq_irqset *irqset)
++{
++	struct hlist_node *n;
++	struct trusty_irq *trusty_irq;
++
++	hlist_for_each_entry(trusty_irq, &irqset->inactive, node) {
++		if (!trusty_irq->enable) {
++			dev_warn(is->dev,
++				 "irq %d already disabled, percpu %d, cpu %d\n",
++				 trusty_irq->irq, trusty_irq->percpu,
++				 smp_processor_id());
++			continue;
++		}
++		dev_dbg(is->dev, "%s: disable irq %d, percpu %d, cpu %d\n",
++			__func__, trusty_irq->irq, trusty_irq->percpu,
++			smp_processor_id());
++		trusty_irq->enable = false;
++		if (trusty_irq->percpu)
++			disable_percpu_irq(trusty_irq->irq);
++		else
++			disable_irq_nosync(trusty_irq->irq);
++	}
++	hlist_for_each_entry_safe(trusty_irq, n, &irqset->pending, node) {
++		if (!trusty_irq->enable) {
++			dev_warn(is->dev,
++				 "pending irq %d already disabled, percpu %d, cpu %d\n",
++				 trusty_irq->irq, trusty_irq->percpu,
++				 smp_processor_id());
++		}
++		dev_dbg(is->dev,
++			"%s: disable pending irq %d, percpu %d, cpu %d\n",
++			__func__, trusty_irq->irq, trusty_irq->percpu,
++			smp_processor_id());
++		trusty_irq->enable = false;
++		hlist_del(&trusty_irq->node);
++		hlist_add_head(&trusty_irq->node, &irqset->inactive);
++	}
++}
++
++static int trusty_irq_call_notify(struct notifier_block *nb,
++				  unsigned long action, void *data)
++{
++	struct trusty_irq_state *is;
++
++	if (WARN_ON(!irqs_disabled()))
++		return NOTIFY_DONE;
++
++	if (action != TRUSTY_CALL_PREPARE)
++		return NOTIFY_DONE;
++
++	is = container_of(nb, struct trusty_irq_state, trusty_call_notifier);
++
++	spin_lock(&is->normal_irqs_lock);
++	trusty_irq_enable_pending_irqs(is, &is->normal_irqs, false);
++	spin_unlock(&is->normal_irqs_lock);
++	trusty_irq_enable_pending_irqs(is, this_cpu_ptr(is->percpu_irqs), true);
++
++	return NOTIFY_OK;
++}
++
++static irqreturn_t trusty_irq_handler(int irq, void *data)
++{
++	struct trusty_irq *trusty_irq = data;
++	struct trusty_irq_state *is = trusty_irq->is;
++	struct trusty_irq_irqset *irqset;
++
++	dev_dbg(is->dev, "%s: irq %d, percpu %d, cpu %d, enable %d\n",
++		__func__, irq, trusty_irq->irq, smp_processor_id(),
++		trusty_irq->enable);
++
++	if (!trusty_irq->doorbell) {
++		if (trusty_irq->percpu) {
++			disable_percpu_irq(irq);
++			irqset = this_cpu_ptr(is->percpu_irqs);
++		} else {
++			disable_irq_nosync(irq);
++			irqset = &is->normal_irqs;
++		}
++
++		spin_lock(&is->normal_irqs_lock);
++		if (trusty_irq->enable) {
++			hlist_del(&trusty_irq->node);
++			hlist_add_head(&trusty_irq->node, &irqset->pending);
++		}
++		spin_unlock(&is->normal_irqs_lock);
++	}
++
++	trusty_enqueue_nop(is->trusty_dev, NULL);
++
++	dev_dbg(is->dev, "%s: irq %d done\n", __func__, irq);
++
++	return IRQ_HANDLED;
++}
++
++static int trusty_irq_cpu_up(unsigned int cpu, struct hlist_node *node)
++{
++	unsigned long irq_flags;
++	struct trusty_irq_state *is;
++
++	is = container_of(node, struct trusty_irq_state, cpuhp_node);
++
++	dev_dbg(is->dev, "%s: cpu %d\n", __func__, cpu);
++
++	local_irq_save(irq_flags);
++	trusty_irq_enable_irqset(is, this_cpu_ptr(is->percpu_irqs));
++	local_irq_restore(irq_flags);
++
++	/*
++	 * Temporary workaround blindly enqueuing work to force trusty scheduler
++	 * to run after a cpu suspend.
++	 * Root causing the workqueue being inappropriately empty
++	 * (e.g. loss of an IPI) may make this workaround unnecessary
++	 * in the future.
++	 */
++	trusty_enqueue_nop(is->trusty_dev, NULL);
++
++	return 0;
++}
++
++static int trusty_irq_cpu_down(unsigned int cpu, struct hlist_node *node)
++{
++	unsigned long irq_flags;
++	struct trusty_irq_state *is;
++
++	is = container_of(node, struct trusty_irq_state, cpuhp_node);
++
++	dev_dbg(is->dev, "%s: cpu %d\n", __func__, cpu);
++
++	local_irq_save(irq_flags);
++	trusty_irq_disable_irqset(is, this_cpu_ptr(is->percpu_irqs));
++	local_irq_restore(irq_flags);
++
++	return 0;
++}
++
++static int trusty_irq_map_ipi(struct trusty_irq_state *is, int irq)
++{
++	int ret;
++	u32 ipi_range[3];
++	struct device_node *gic;
++	struct of_phandle_args oirq = {};
++	u32 beg, end, ipi_base;
++
++	ret = of_property_read_u32_array(is->dev->of_node, "ipi-range",
++					 ipi_range, ARRAY_SIZE(ipi_range));
++	if (ret != 0)
++		return -ENODATA;
++	beg = ipi_range[0];
++	end = ipi_range[1];
++	ipi_base = ipi_range[2];
++
++	if (irq < beg || irq > end)
++		return -ENODATA;
++
++	gic = of_irq_find_parent(is->dev->of_node);
++	if (!gic)
++		return -ENXIO;
++
++	oirq.np = gic;
++	oirq.args_count = 1;
++	oirq.args[0] = ipi_base + (irq - beg);
++
++	ret = irq_create_of_mapping(&oirq);
++
++	of_node_put(gic);
++	return (!ret) ? -EINVAL : ret;
++}
++
++static int trusty_irq_create_irq_mapping(struct trusty_irq_state *is, int irq)
++{
++	int ret;
++	int index;
++	u32 irq_pos;
++	u32 templ_idx;
++	u32 range_base;
++	u32 range_end;
++	struct of_phandle_args oirq;
++
++	/* check if this is an IPI (inter-processor interrupt) */
++	ret = trusty_irq_map_ipi(is, irq);
++	if (ret != -ENODATA)
++		return ret;
++
++	/* check if "interrupt-ranges" property is present */
++	if (!of_find_property(is->dev->of_node, "interrupt-ranges", NULL)) {
++		/* fallback to old behavior to be backward compatible with
++		 * systems that do not need IRQ domains.
++		 */
++		return irq;
++	}
++
++	/* find irq range */
++	for (index = 0;; index += 3) {
++		ret = of_property_read_u32_index(is->dev->of_node,
++						 "interrupt-ranges",
++						 index, &range_base);
++		if (ret)
++			return ret;
++
++		ret = of_property_read_u32_index(is->dev->of_node,
++						 "interrupt-ranges",
++						 index + 1, &range_end);
++		if (ret)
++			return ret;
++
++		if (irq >= range_base && irq <= range_end)
++			break;
++	}
++
++	/*  read the rest of range entry: template index and irq_pos */
++	ret = of_property_read_u32_index(is->dev->of_node,
++					 "interrupt-ranges",
++					 index + 2, &templ_idx);
++	if (ret)
++		return ret;
++
++	/* read irq template */
++	ret = of_parse_phandle_with_args(is->dev->of_node,
++					 "interrupt-templates",
++					 "#interrupt-cells",
++					 templ_idx, &oirq);
++	if (ret)
++		return ret;
++
++	WARN_ON(!oirq.np);
++	WARN_ON(!oirq.args_count);
++
++	/*
++	 * An IRQ template is a non empty array of u32 values describing group
++	 * of interrupts having common properties. The u32 entry with index
++	 * zero contains the position of irq_id in interrupt specifier array
++	 * followed by data representing interrupt specifier array with irq id
++	 * field omitted, so to convert irq template to interrupt specifier
++	 * array we have to move down one slot the first irq_pos entries and
++	 * replace the resulting gap with real irq id.
++	 */
++	irq_pos = oirq.args[0];
++
++	if (irq_pos >= oirq.args_count) {
++		dev_err(is->dev, "irq pos is out of range: %d\n", irq_pos);
++		return -EINVAL;
++	}
++
++	for (index = 1; index <= irq_pos; index++)
++		oirq.args[index - 1] = oirq.args[index];
++
++	oirq.args[irq_pos] = irq - range_base;
++
++	ret = irq_create_of_mapping(&oirq);
++
++	return (!ret) ? -EINVAL : ret;
++}
++
++static int trusty_irq_init_normal_irq(struct trusty_irq_state *is, int tirq)
++{
++	int ret;
++	int irq;
++	unsigned long irq_flags;
++	struct trusty_irq *trusty_irq;
++
++	dev_dbg(is->dev, "%s: irq %d\n", __func__, tirq);
++
++	irq = trusty_irq_create_irq_mapping(is, tirq);
++	if (irq < 0) {
++		dev_err(is->dev,
++			"trusty_irq_create_irq_mapping failed (%d)\n", irq);
++		return irq;
++	}
++
++	trusty_irq = kzalloc(sizeof(*trusty_irq), GFP_KERNEL);
++	if (!trusty_irq)
++		return -ENOMEM;
++
++	trusty_irq->is = is;
++	trusty_irq->irq = irq;
++	trusty_irq->enable = true;
++
++	spin_lock_irqsave(&is->normal_irqs_lock, irq_flags);
++	hlist_add_head(&trusty_irq->node, &is->normal_irqs.inactive);
++	spin_unlock_irqrestore(&is->normal_irqs_lock, irq_flags);
++
++	ret = request_irq(irq, trusty_irq_handler, IRQF_NO_THREAD,
++			  "trusty", trusty_irq);
++	if (ret) {
++		dev_err(is->dev, "request_irq failed %d\n", ret);
++		goto err_request_irq;
++	}
++	return 0;
++
++err_request_irq:
++	spin_lock_irqsave(&is->normal_irqs_lock, irq_flags);
++	hlist_del(&trusty_irq->node);
++	spin_unlock_irqrestore(&is->normal_irqs_lock, irq_flags);
++	kfree(trusty_irq);
++	return ret;
++}
++
++static int trusty_irq_init_per_cpu_irq(struct trusty_irq_state *is, int tirq,
++				       unsigned int type)
++{
++	int ret;
++	int irq;
++	unsigned int cpu;
++	struct trusty_irq __percpu *trusty_irq_handler_data;
++
++	dev_dbg(is->dev, "%s: irq %d\n", __func__, tirq);
++
++	irq = trusty_irq_create_irq_mapping(is, tirq);
++	if (irq <= 0) {
++		dev_err(is->dev,
++			"trusty_irq_create_irq_mapping failed (%d)\n", irq);
++		return irq;
++	}
++
++	trusty_irq_handler_data = alloc_percpu(struct trusty_irq);
++	if (!trusty_irq_handler_data)
++		return -ENOMEM;
++
++	for_each_possible_cpu(cpu) {
++		struct trusty_irq *trusty_irq;
++		struct trusty_irq_irqset *irqset;
++
++		trusty_irq = per_cpu_ptr(trusty_irq_handler_data, cpu);
++		irqset = per_cpu_ptr(is->percpu_irqs, cpu);
++
++		trusty_irq->is = is;
++		hlist_add_head(&trusty_irq->node, &irqset->inactive);
++		trusty_irq->irq = irq;
++		trusty_irq->percpu = true;
++		trusty_irq->doorbell = type == TRUSTY_IRQ_TYPE_DOORBELL;
++		trusty_irq->percpu_ptr = trusty_irq_handler_data;
++	}
++
++	ret = request_percpu_irq(irq, trusty_irq_handler, "trusty",
++				 trusty_irq_handler_data);
++	if (ret) {
++		dev_err(is->dev, "request_percpu_irq failed %d\n", ret);
++		goto err_request_percpu_irq;
++	}
++
++	return 0;
++
++err_request_percpu_irq:
++	for_each_possible_cpu(cpu) {
++		struct trusty_irq *trusty_irq;
++
++		trusty_irq = per_cpu_ptr(trusty_irq_handler_data, cpu);
++		hlist_del(&trusty_irq->node);
++	}
++
++	free_percpu(trusty_irq_handler_data);
++	return ret;
++}
++
++static int trusty_smc_get_next_irq(struct trusty_irq_state *is,
++				   unsigned long min_irq, unsigned int type)
++{
++	return trusty_fast_call32(is->trusty_dev, SMC_FC_GET_NEXT_IRQ,
++				  min_irq, type, 0);
++}
++
++static int trusty_irq_init_one(struct trusty_irq_state *is,
++			       int irq, unsigned int type)
++{
++	int ret;
++
++	irq = trusty_smc_get_next_irq(is, irq, type);
++	if (irq < 0)
++		return irq;
++
++	if (type != TRUSTY_IRQ_TYPE_NORMAL)
++		ret = trusty_irq_init_per_cpu_irq(is, irq, type);
++	else
++		ret = trusty_irq_init_normal_irq(is, irq);
++
++	if (ret) {
++		dev_warn(is->dev,
++			 "failed to initialize irq %d, irq will be ignored\n",
++			 irq);
++	}
++
++	return irq + 1;
++}
++
++static void trusty_irq_free_irqs(struct trusty_irq_state *is)
++{
++	struct trusty_irq *irq;
++	struct hlist_node *n;
++	unsigned int cpu;
++
++	hlist_for_each_entry_safe(irq, n, &is->normal_irqs.inactive, node) {
++		dev_dbg(is->dev, "%s: irq %d\n", __func__, irq->irq);
++		free_irq(irq->irq, irq);
++		hlist_del(&irq->node);
++		kfree(irq);
++	}
++	hlist_for_each_entry_safe(irq, n,
++				  &this_cpu_ptr(is->percpu_irqs)->inactive,
++				  node) {
++		struct trusty_irq __percpu *trusty_irq_handler_data;
++
++		dev_dbg(is->dev, "%s: percpu irq %d\n", __func__, irq->irq);
++		trusty_irq_handler_data = irq->percpu_ptr;
++		free_percpu_irq(irq->irq, trusty_irq_handler_data);
++		for_each_possible_cpu(cpu) {
++			struct trusty_irq *irq_tmp;
++
++			irq_tmp = per_cpu_ptr(trusty_irq_handler_data, cpu);
++			hlist_del(&irq_tmp->node);
++		}
++		free_percpu(trusty_irq_handler_data);
++	}
++}
++
++static int trusty_irq_probe(struct platform_device *pdev)
++{
++	int ret;
++	int irq;
++	unsigned long irq_flags;
++	struct trusty_irq_state *is;
++
++	is = kzalloc(sizeof(*is), GFP_KERNEL);
++	if (!is) {
++		ret = -ENOMEM;
++		goto err_alloc_is;
++	}
++
++	is->dev = &pdev->dev;
++	is->trusty_dev = is->dev->parent;
++	spin_lock_init(&is->normal_irqs_lock);
++	is->percpu_irqs = alloc_percpu(struct trusty_irq_irqset);
++	if (!is->percpu_irqs) {
++		ret = -ENOMEM;
++		goto err_alloc_pending_percpu_irqs;
++	}
++
++	platform_set_drvdata(pdev, is);
++
++	is->trusty_call_notifier.notifier_call = trusty_irq_call_notify;
++	ret = trusty_call_notifier_register(is->trusty_dev,
++					    &is->trusty_call_notifier);
++	if (ret) {
++		dev_err(&pdev->dev,
++			"failed to register trusty call notifier\n");
++		goto err_trusty_call_notifier_register;
++	}
++
++	for (irq = 0; irq >= 0;)
++		irq = trusty_irq_init_one(is, irq, TRUSTY_IRQ_TYPE_PER_CPU);
++	for (irq = 0; irq >= 0;)
++		irq = trusty_irq_init_one(is, irq, TRUSTY_IRQ_TYPE_NORMAL);
++	for (irq = 0; irq >= 0;)
++		irq = trusty_irq_init_one(is, irq, TRUSTY_IRQ_TYPE_DOORBELL);
++
++	ret = cpuhp_state_add_instance(trusty_irq_cpuhp_slot, &is->cpuhp_node);
++	if (ret < 0) {
++		dev_err(&pdev->dev, "cpuhp_state_add_instance failed %d\n",
++			ret);
++		goto err_add_cpuhp_instance;
++	}
++
++	return 0;
++
++err_add_cpuhp_instance:
++	spin_lock_irqsave(&is->normal_irqs_lock, irq_flags);
++	trusty_irq_disable_irqset(is, &is->normal_irqs);
++	spin_unlock_irqrestore(&is->normal_irqs_lock, irq_flags);
++	trusty_irq_free_irqs(is);
++	trusty_call_notifier_unregister(is->trusty_dev,
++					&is->trusty_call_notifier);
++err_trusty_call_notifier_register:
++	free_percpu(is->percpu_irqs);
++err_alloc_pending_percpu_irqs:
++	kfree(is);
++err_alloc_is:
++	return ret;
++}
++
++static int trusty_irq_remove(struct platform_device *pdev)
++{
++	int ret;
++	unsigned long irq_flags;
++	struct trusty_irq_state *is = platform_get_drvdata(pdev);
++
++	ret = cpuhp_state_remove_instance(trusty_irq_cpuhp_slot,
++					  &is->cpuhp_node);
++	if (WARN_ON(ret))
++		return ret;
++
++	spin_lock_irqsave(&is->normal_irqs_lock, irq_flags);
++	trusty_irq_disable_irqset(is, &is->normal_irqs);
++	spin_unlock_irqrestore(&is->normal_irqs_lock, irq_flags);
++
++	trusty_irq_free_irqs(is);
++
++	trusty_call_notifier_unregister(is->trusty_dev,
++					&is->trusty_call_notifier);
++	free_percpu(is->percpu_irqs);
++	kfree(is);
++
++	return 0;
++}
++
++static const struct of_device_id trusty_test_of_match[] = {
++	{ .compatible = "android,trusty-irq-v1", },
++	{},
++};
++
++MODULE_DEVICE_TABLE(trusty, trusty_test_of_match);
++
++static struct platform_driver trusty_irq_driver = {
++	.probe = trusty_irq_probe,
++	.remove = trusty_irq_remove,
++	.driver	= {
++		.name = "trusty-irq",
++		.of_match_table = trusty_test_of_match,
++	},
++};
++
++static int __init trusty_irq_driver_init(void)
++{
++	int ret;
++
++	/* allocate dynamic cpuhp state slot */
++	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
++				      "trusty-irq:cpu:online",
++				      trusty_irq_cpu_up,
++				      trusty_irq_cpu_down);
++	if (ret < 0)
++		return ret;
++	trusty_irq_cpuhp_slot = ret;
++
++	/* Register platform driver */
++	ret = platform_driver_register(&trusty_irq_driver);
++	if (ret < 0)
++		goto err_driver_register;
++
++	return ret;
++
++err_driver_register:
++	/* undo cpuhp slot allocation */
++	cpuhp_remove_multi_state(trusty_irq_cpuhp_slot);
++	trusty_irq_cpuhp_slot = -1;
++
++	return ret;
++}
++
++static void __exit trusty_irq_driver_exit(void)
++{
++	platform_driver_unregister(&trusty_irq_driver);
++	cpuhp_remove_multi_state(trusty_irq_cpuhp_slot);
++	trusty_irq_cpuhp_slot = -1;
++}
++
++module_init(trusty_irq_driver_init);
++module_exit(trusty_irq_driver_exit);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Trusty IRQ driver");
+diff --git a/drivers/trusty/trusty-log.c b/drivers/trusty/trusty-log.c
+new file mode 100644
+index 000000000000..7b279fe63766
+--- /dev/null
++++ b/drivers/trusty/trusty-log.c
+@@ -0,0 +1,830 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2015 Google, Inc.
++ */
++#include <linux/platform_device.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/trusty.h>
++#include <linux/notifier.h>
++#include <linux/scatterlist.h>
++#include <linux/slab.h>
++#include <linux/mm.h>
++#include <linux/mod_devicetable.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/log2.h>
++#include <linux/miscdevice.h>
++#include <linux/poll.h>
++#include <linux/seq_file.h>
++#include <asm/page.h>
++#include "trusty-log.h"
++
++/*
++ * Rationale for the chosen default log buffer size:
++ *  - the log buffer shall contain unthrottled Trusty crash dump.
++ *  - the register list portion of a crash dump is about 1KB
++ *  - the memory-around-registers portion of a crash dump can be up to 12 KB
++ *  - an average size backtrace is about 1 KB
++ *  - average length of non-crash trusty logs during boot is about 85 characters
++ *  - a crash dump with 50 lines of context therefore requires up to 18 KB
++ *  - buffer size needs to be power-of-two number of bytes
++ *  - rounding up to power of two from 18 KB gives 32 KB
++ *  The log size can be adjusted by setting the "trusty_log.log_size" parameter
++ *  on the kernel command line. The specified value will be adjusted as needed.
++ */
++
++#define TRUSTY_LOG_DEFAULT_SIZE (32768)
++#define TRUSTY_LOG_MIN_SIZE (PAGE_SIZE / 2)
++#define TRUSTY_LOG_MAX_SIZE (1 * 1024 * 1024 * 1024)
++#define TRUSTY_LINE_BUFFER_SIZE (256)
++
++static size_t log_size_param = TRUSTY_LOG_DEFAULT_SIZE;
++
++static int trusty_log_size_set(const char *val, const struct kernel_param *kp)
++{
++	unsigned long long requested = memparse(val, NULL);
++
++	if (requested < TRUSTY_LOG_MIN_SIZE)
++		requested = TRUSTY_LOG_MIN_SIZE;
++	if (requested > TRUSTY_LOG_MAX_SIZE)
++		requested = TRUSTY_LOG_MAX_SIZE;
++	requested = rounddown_pow_of_two(requested);
++	log_size_param = requested;
++	return 0;
++}
++
++static int trusty_log_size_get(char *buffer, const struct kernel_param *kp)
++{
++	sprintf(buffer, "%zu", log_size_param);
++	return strlen(buffer);
++}
++
++module_param_call(log_size, trusty_log_size_set, trusty_log_size_get, NULL,
++		  0644);
++/*
++ * If we log too much and a UART or other slow source is connected, we can stall
++ * out another thread which is doing printk.
++ *
++ * Trusty crash logs are currently ~16 lines, so 100 should include context and
++ * the crash most of the time.
++ */
++static struct ratelimit_state trusty_log_rate_limit =
++	RATELIMIT_STATE_INIT("trusty_log", 1 * HZ, 100);
++
++/**
++ * struct trusty_log_sfile - trusty log misc device state
++ *
++ * @misc:          misc device created for the trusty log virtual file
++ * @device_name:   misc device name following the convention
++ *                 "trusty-<name><id>"
++ */
++struct trusty_log_sfile {
++	struct miscdevice misc;
++	char device_name[64];
++};
++
++/**
++ * struct trusty_log_sink_state - trusty log sink state
++ *
++ * @get:              current read unwrapped index
++ * @trusty_panicked:  trusty panic status at the start of the sink interation
++ *                    (only used for kernel log sink)
++ * @sfile:            seq_file used for sinking to a virtual file (misc device);
++ *                    set to NULL for the kernel log sink.
++ * @ignore_overflow:  ignore_overflow used to coalesce overflow messages and
++ *                    avoid reporting an overflow when sinking the oldest
++ *                    line to the virtual file (only used for virtual file sink)
++ *
++ * A sink state structure is used for both the kernel log sink
++ * and the virtual device sink.
++ * An instance of the sink state structure is dynamically created
++ * for each read iteration of the trusty log virtual file (misc device).
++ *
++ */
++struct trusty_log_sink_state {
++	u32 get;
++	bool trusty_panicked;
++
++	/* virtual file sink specific attributes */
++	struct seq_file *sfile;
++	bool ignore_overflow;
++};
++
++struct trusty_log_state {
++	struct device *dev;
++	struct device *trusty_dev;
++	struct trusty_log_sfile log_sfile;
++
++	struct log_rb *log;
++	struct trusty_log_sink_state klog_sink;
++
++	u32 log_num_pages;
++	struct scatterlist *sg;
++	trusty_shared_mem_id_t log_pages_shared_mem_id;
++
++	struct notifier_block call_notifier;
++	struct notifier_block panic_notifier;
++	char line_buffer[TRUSTY_LINE_BUFFER_SIZE];
++	wait_queue_head_t poll_waiters;
++	/* this lock protects access to wake_put */
++	spinlock_t wake_up_lock;
++	u32 last_wake_put;
++};
++
++static inline u32 u32_add_overflow(u32 a, u32 b)
++{
++	u32 d;
++
++	if (check_add_overflow(a, b, &d)) {
++		/*
++		 * silence the overflow,
++		 * what matters in the log buffer context
++		 * is the casted addition
++		 */
++	}
++	return d;
++}
++
++static inline u32 u32_sub_overflow(u32 a, u32 b)
++{
++	u32 d;
++
++	if (check_sub_overflow(a, b, &d)) {
++		/*
++		 * silence the overflow,
++		 * what matters in the log buffer context
++		 * is the casted substraction
++		 */
++	}
++	return d;
++}
++
++static int log_read_line(struct trusty_log_state *s, u32 put, u32 get)
++{
++	struct log_rb *log = s->log;
++	int i;
++	char c = '\0';
++	size_t max_to_read =
++		min_t(size_t,
++		      u32_sub_overflow(put, get),
++		      sizeof(s->line_buffer) - 1);
++	size_t mask = log->sz - 1;
++
++	for (i = 0; i < max_to_read && c != '\n';) {
++		c = log->data[get & mask];
++		s->line_buffer[i++] = c;
++		get = u32_add_overflow(get, 1);
++	}
++	s->line_buffer[i] = '\0';
++
++	return i;
++}
++
++/**
++ * trusty_log_has_data() - returns true when more data is available to sink
++ * @s:         Current log state.
++ * @sink:      trusty_log_sink_state holding the get index on a given sink
++ *
++ * Return: true if data is available.
++ */
++static bool trusty_log_has_data(struct trusty_log_state *s,
++				struct trusty_log_sink_state *sink)
++{
++	struct log_rb *log = s->log;
++
++	return (log->put != sink->get);
++}
++
++/**
++ * trusty_log_start() - initialize the sink iteration either to kernel log
++ * or to secondary log_sfile
++ * @s:         Current log state.
++ * @sink:      trusty_log_sink_state holding the get index on a given sink
++ * @index:     Unwrapped ring buffer index from where iteration shall start
++ *
++ * Return: 0 if successful, negative error code otherwise
++ */
++static int trusty_log_start(struct trusty_log_state *s,
++			    struct trusty_log_sink_state *sink,
++			    u32 index)
++{
++	struct log_rb *log;
++
++	if (WARN_ON(!s))
++		return -EINVAL;
++
++	log = s->log;
++	if (WARN_ON(!is_power_of_2(log->sz)))
++		return -EINVAL;
++
++	sink->get = index;
++	return 0;
++}
++
++/**
++ * trusty_log_show() - sink log entry at current iteration
++ * @s:         Current log state.
++ * @sink:      trusty_log_sink_state holding the get index on a given sink
++ */
++static void trusty_log_show(struct trusty_log_state *s,
++			    struct trusty_log_sink_state *sink)
++{
++	struct log_rb *log = s->log;
++	u32 alloc, put, get;
++	int read_chars;
++
++	/*
++	 * For this ring buffer, at any given point, alloc >= put >= get.
++	 * The producer side of the buffer is not locked, so the put and alloc
++	 * pointers must be read in a defined order (put before alloc) so
++	 * that the above condition is maintained. A read barrier is needed
++	 * to make sure the hardware and compiler keep the reads ordered.
++	 */
++	get = sink->get;
++	put = log->put;
++
++	/* Make sure that the read of put occurs before the read of log data */
++	rmb();
++
++	/* Read a line from the log */
++	read_chars = log_read_line(s, put, get);
++
++	/* Force the loads from log_read_line to complete. */
++	rmb();
++	alloc = log->alloc;
++
++	/*
++	 * Discard the line that was just read if the data could
++	 * have been corrupted by the producer.
++	 */
++	if (u32_sub_overflow(alloc, get) > log->sz) {
++		/*
++		 * this condition is acceptable in the case of the sfile sink
++		 * when attempting to read the oldest entry (at alloc-log->sz)
++		 * which may be overrun by a new one when ring buffer write
++		 * index wraps around.
++		 * So the overrun is not reported in case the oldest line
++		 * was being read.
++		 */
++		if (sink->sfile) {
++			if (!sink->ignore_overflow)
++				seq_puts(sink->sfile, "log overflow.\n");
++			/* coalesce subsequent contiguous overflows. */
++			sink->ignore_overflow = true;
++		} else {
++			dev_err(s->dev, "log overflow.\n");
++		}
++		sink->get = u32_sub_overflow(alloc, log->sz);
++		return;
++	}
++	/* compute next line index */
++	sink->get = u32_add_overflow(get, read_chars);
++	/* once a line is valid, ignore_overflow must be disabled */
++	sink->ignore_overflow = false;
++	if (sink->sfile) {
++		seq_printf(sink->sfile, "%s", s->line_buffer);
++	} else {
++		if (sink->trusty_panicked ||
++		    __ratelimit(&trusty_log_rate_limit)) {
++			dev_info(s->dev, "%s", s->line_buffer);
++		}
++	}
++}
++
++static void *trusty_log_seq_start(struct seq_file *sfile, loff_t *pos)
++{
++	struct trusty_log_sfile *lb;
++	struct trusty_log_state *s;
++	struct log_rb *log;
++	struct trusty_log_sink_state *log_sfile_sink;
++	u32 index;
++	int rc;
++
++	if (WARN_ON(!pos))
++		return ERR_PTR(-EINVAL);
++
++	lb = sfile->private;
++	if (WARN_ON(!lb))
++		return ERR_PTR(-EINVAL);
++
++	log_sfile_sink = kzalloc(sizeof(*log_sfile_sink), GFP_KERNEL);
++	if (!log_sfile_sink)
++		return ERR_PTR(-ENOMEM);
++
++	s = container_of(lb, struct trusty_log_state, log_sfile);
++	log_sfile_sink->sfile = sfile;
++	log = s->log;
++	if (*pos == 0) {
++		/* start at the oldest line */
++		index = 0;
++		if (log->alloc > log->sz)
++			index = u32_sub_overflow(log->alloc, log->sz);
++	} else {
++		/*
++		 * '*pos>0': pos hold the 32bits unwrapped index from where
++		 * to start iterating
++		 */
++		index = (u32)*pos;
++	}
++	pr_debug("%s start=%u\n", __func__, index);
++
++	log_sfile_sink->ignore_overflow = true;
++	rc = trusty_log_start(s, log_sfile_sink, index);
++	if (rc < 0)
++		goto free_sink;
++
++	if (!trusty_log_has_data(s, log_sfile_sink))
++		goto free_sink;
++
++	return log_sfile_sink;
++
++free_sink:
++	pr_debug("%s kfree\n", __func__);
++	kfree(log_sfile_sink);
++	return rc < 0 ? ERR_PTR(rc) : NULL;
++}
++
++static void *trusty_log_seq_next(struct seq_file *sfile, void *v, loff_t *pos)
++{
++	struct trusty_log_sfile *lb;
++	struct trusty_log_state *s;
++	struct trusty_log_sink_state *log_sfile_sink = v;
++	int rc = 0;
++
++	if (WARN_ON(!log_sfile_sink))
++		return ERR_PTR(-EINVAL);
++
++	lb = sfile->private;
++	if (WARN_ON(!lb)) {
++		rc = -EINVAL;
++		goto end_of_iter;
++	}
++	s = container_of(lb, struct trusty_log_state, log_sfile);
++
++	if (WARN_ON(!pos)) {
++		rc = -EINVAL;
++		goto end_of_iter;
++	}
++	/*
++	 * When starting a virtual file sink, the start function is invoked
++	 * with a pos argument which value is set to zero.
++	 * Subsequent starts are invoked with pos being set to
++	 * the unwrapped read index (get).
++	 * Upon u32 wraparound, the get index could be reset to zero.
++	 * Thus a msb is used to distinguish the `get` zero value
++	 * from the `start of file` zero value.
++	 */
++	*pos = (1UL << 32) + log_sfile_sink->get;
++	if (!trusty_log_has_data(s, log_sfile_sink))
++		goto end_of_iter;
++
++	return log_sfile_sink;
++
++end_of_iter:
++	pr_debug("%s kfree\n", __func__);
++	kfree(log_sfile_sink);
++	return rc < 0 ? ERR_PTR(rc) : NULL;
++}
++
++static void trusty_log_seq_stop(struct seq_file *sfile, void *v)
++{
++	/*
++	 * When iteration completes or on error, the next callback frees
++	 * the sink structure and returns NULL/error-code.
++	 * In that case stop (being invoked with void* v set to the last next
++	 * return value) would be invoked with v == NULL or error code.
++	 * When user space stops the iteration earlier than the end
++	 * (in case of user-space memory allocation limit for example)
++	 * then the stop function receives a non NULL get pointer
++	 * and is in charge or freeing the sink structure.
++	 */
++	struct trusty_log_sink_state *log_sfile_sink = v;
++
++	/* nothing to do - sink structure already freed */
++	if (IS_ERR_OR_NULL(log_sfile_sink))
++		return;
++
++	kfree(log_sfile_sink);
++
++	pr_debug("%s kfree\n", __func__);
++}
++
++static int trusty_log_seq_show(struct seq_file *sfile, void *v)
++{
++	struct trusty_log_sfile *lb;
++	struct trusty_log_state *s;
++	struct trusty_log_sink_state *log_sfile_sink = v;
++
++	if (WARN_ON(!log_sfile_sink))
++		return -EINVAL;
++
++	lb = sfile->private;
++	if (WARN_ON(!lb))
++		return -EINVAL;
++
++	s = container_of(lb, struct trusty_log_state, log_sfile);
++
++	trusty_log_show(s, log_sfile_sink);
++	return 0;
++}
++
++static void trusty_dump_logs(struct trusty_log_state *s)
++{
++	int rc;
++	/*
++	 * note: klog_sink.get initialized to zero by kzalloc
++	 */
++	s->klog_sink.trusty_panicked = trusty_get_panic_status(s->trusty_dev);
++
++	rc = trusty_log_start(s, &s->klog_sink, s->klog_sink.get);
++	if (rc < 0)
++		return;
++
++	while (trusty_log_has_data(s, &s->klog_sink))
++		trusty_log_show(s, &s->klog_sink);
++}
++
++static int trusty_log_call_notify(struct notifier_block *nb,
++				  unsigned long action, void *data)
++{
++	struct trusty_log_state *s;
++	unsigned long flags;
++	u32 cur_put;
++
++	if (action != TRUSTY_CALL_RETURNED)
++		return NOTIFY_DONE;
++
++	s = container_of(nb, struct trusty_log_state, call_notifier);
++	spin_lock_irqsave(&s->wake_up_lock, flags);
++	cur_put = s->log->put;
++	if (cur_put != s->last_wake_put) {
++		s->last_wake_put = cur_put;
++		wake_up_all(&s->poll_waiters);
++	}
++	spin_unlock_irqrestore(&s->wake_up_lock, flags);
++	return NOTIFY_OK;
++}
++
++static int trusty_log_panic_notify(struct notifier_block *nb,
++				   unsigned long action, void *data)
++{
++	struct trusty_log_state *s;
++
++	/*
++	 * Don't grab the spin lock to hold up the panic notifier, even
++	 * though this is racy.
++	 */
++	s = container_of(nb, struct trusty_log_state, panic_notifier);
++	dev_info(s->dev, "panic notifier - trusty version %s",
++		 trusty_version_str_get(s->trusty_dev));
++	trusty_dump_logs(s);
++	return NOTIFY_OK;
++}
++
++const struct seq_operations trusty_log_seq_ops = {
++	.start = trusty_log_seq_start,
++	.stop = trusty_log_seq_stop,
++	.next = trusty_log_seq_next,
++	.show = trusty_log_seq_show,
++};
++
++static int trusty_log_sfile_dev_open(struct inode *inode, struct file *file)
++{
++	struct trusty_log_sfile *ls;
++	struct seq_file *sfile;
++	int rc;
++
++	/*
++	 * file->private_data contains a pointer to the misc_device struct
++	 * passed to misc_register()
++	 */
++	if (WARN_ON(!file->private_data))
++		return -EINVAL;
++
++	ls = container_of(file->private_data, struct trusty_log_sfile, misc);
++
++	/*
++	 * seq_open uses file->private_data to store the seq_file associated
++	 * with the struct file, but it must be NULL when seq_open is called
++	 */
++	file->private_data = NULL;
++	rc = seq_open(file, &trusty_log_seq_ops);
++	if (rc < 0)
++		return rc;
++
++	sfile = file->private_data;
++	if (WARN_ON(!sfile))
++		return -EINVAL;
++
++	sfile->private = ls;
++	return 0;
++}
++
++static unsigned int trusty_log_sfile_dev_poll(struct file *filp,
++					      struct poll_table_struct *wait)
++{
++	struct seq_file *sfile;
++	struct trusty_log_sfile *lb;
++	struct trusty_log_state *s;
++	struct log_rb *log;
++
++	/*
++	 * trusty_log_sfile_dev_open() pointed filp->private_data to a
++	 * seq_file, and that seq_file->private to the trusty_log_sfile
++	 * field of a trusty_log_state
++	 */
++	sfile = filp->private_data;
++	lb = sfile->private;
++	s = container_of(lb, struct trusty_log_state, log_sfile);
++	poll_wait(filp, &s->poll_waiters, wait);
++	log = s->log;
++
++	/*
++	 * Userspace has read up to filp->f_pos so far. Update klog_sink
++	 * to indicate that, so that we don't end up dumping the entire
++	 * Trusty log in case of panic.
++	 */
++	s->klog_sink.get = (u32)filp->f_pos;
++
++	if (log->put != (u32)filp->f_pos) {
++		/* data ready to read */
++		return EPOLLIN | EPOLLRDNORM;
++	}
++	/* no data available, go to sleep */
++	return 0;
++}
++
++static const struct file_operations log_sfile_dev_operations = {
++	.owner = THIS_MODULE,
++	.open = trusty_log_sfile_dev_open,
++	.poll = trusty_log_sfile_dev_poll,
++	.read = seq_read,
++	.release = seq_release,
++};
++
++static int trusty_log_sfile_register(struct trusty_log_state *s)
++{
++	int ret;
++	struct trusty_log_sfile *ls = &s->log_sfile;
++
++	if (WARN_ON(!ls))
++		return -EINVAL;
++
++	snprintf(ls->device_name, sizeof(ls->device_name),
++		 "trusty-log%d", s->dev->id);
++	ls->misc.minor = MISC_DYNAMIC_MINOR;
++	ls->misc.name = ls->device_name;
++	ls->misc.fops = &log_sfile_dev_operations;
++
++	ret = misc_register(&ls->misc);
++	if (ret) {
++		dev_err(s->dev,
++			"log_sfile error while doing misc_register ret=%d\n",
++			ret);
++		return ret;
++	}
++	dev_info(s->dev, "/dev/%s registered\n",
++		 ls->device_name);
++	return 0;
++}
++
++static void trusty_log_sfile_unregister(struct trusty_log_state *s)
++{
++	struct trusty_log_sfile *ls = &s->log_sfile;
++
++	misc_deregister(&ls->misc);
++	if (s->dev) {
++		dev_info(s->dev, "/dev/%s unregistered\n",
++			 ls->misc.name);
++	}
++}
++
++static bool trusty_supports_logging(struct device *device)
++{
++	int result;
++
++	result = trusty_std_call32(device, SMC_SC_SHARED_LOG_VERSION,
++				   TRUSTY_LOG_API_VERSION, 0, 0);
++	if (result == SM_ERR_UNDEFINED_SMC) {
++		dev_info(device, "trusty-log not supported on secure side.\n");
++		return false;
++	} else if (result < 0) {
++		dev_err(device,
++			"trusty std call (SMC_SC_SHARED_LOG_VERSION) failed: %d\n",
++			result);
++		return false;
++	}
++
++	if (result != TRUSTY_LOG_API_VERSION) {
++		dev_info(device, "unsupported api version: %d, supported: %d\n",
++			 result, TRUSTY_LOG_API_VERSION);
++		return false;
++	}
++	return true;
++}
++
++static int trusty_log_init(struct platform_device *pdev)
++{
++	struct trusty_log_state *s;
++	struct scatterlist *sg;
++	unsigned char *mem;
++	int i;
++	int result;
++	trusty_shared_mem_id_t mem_id;
++	int log_size;
++
++	s = kzalloc(sizeof(*s), GFP_KERNEL);
++	if (!s) {
++		result = -ENOMEM;
++		goto error_alloc_state;
++	}
++
++	s->dev = &pdev->dev;
++	s->trusty_dev = s->dev->parent;
++
++	s->log_num_pages = DIV_ROUND_UP(log_size_param + sizeof(struct log_rb),
++					PAGE_SIZE);
++	s->sg = kcalloc(s->log_num_pages, sizeof(*s->sg), GFP_KERNEL);
++	if (!s->sg) {
++		result = -ENOMEM;
++		goto error_alloc_sg;
++	}
++
++	log_size = s->log_num_pages * PAGE_SIZE;
++	mem = vzalloc(log_size);
++	if (!mem) {
++		result = -ENOMEM;
++		goto error_alloc_log;
++	}
++
++	s->log = (struct log_rb *)mem;
++
++	sg_init_table(s->sg, s->log_num_pages);
++	for_each_sg(s->sg, sg, s->log_num_pages, i) {
++		struct page *pg = vmalloc_to_page(mem + (i * PAGE_SIZE));
++
++		if (!pg) {
++			result = -ENOMEM;
++			goto err_share_memory;
++		}
++		sg_set_page(sg, pg, PAGE_SIZE, 0);
++	}
++	/*
++	 * This will fail for Trusty api version < TRUSTY_API_VERSION_MEM_OBJ
++	 * if s->log_num_pages > 1
++	 * Use trusty_share_memory_compat instead of trusty_share_memory in case
++	 * s->log_num_pages == 1 and api version < TRUSTY_API_VERSION_MEM_OBJ,
++	 * In that case SMC_SC_SHARED_LOG_ADD expects a different value than
++	 * what trusty_share_memory returns
++	 */
++	result = trusty_share_memory_compat(s->trusty_dev, &mem_id, s->sg,
++					    s->log_num_pages, PAGE_KERNEL);
++	if (result) {
++		dev_err(s->dev, "trusty_share_memory failed: %d\n", result);
++		goto err_share_memory;
++	}
++	s->log_pages_shared_mem_id = mem_id;
++
++	result = trusty_std_call32(s->trusty_dev,
++				   SMC_SC_SHARED_LOG_ADD,
++				   (u32)(mem_id), (u32)(mem_id >> 32),
++				   log_size);
++	if (result < 0) {
++		dev_err(s->dev,
++			"trusty std call (SMC_SC_SHARED_LOG_ADD) failed: %d 0x%llx\n",
++			result, mem_id);
++		goto error_std_call;
++	}
++
++	init_waitqueue_head(&s->poll_waiters);
++	spin_lock_init(&s->wake_up_lock);
++
++	s->call_notifier.notifier_call = trusty_log_call_notify;
++	result = trusty_call_notifier_register(s->trusty_dev,
++					       &s->call_notifier);
++	if (result < 0) {
++		dev_err(&pdev->dev,
++			"failed to register trusty call notifier\n");
++		goto error_call_notifier;
++	}
++
++	s->panic_notifier.notifier_call = trusty_log_panic_notify;
++	result = atomic_notifier_chain_register(&panic_notifier_list,
++						&s->panic_notifier);
++	if (result < 0) {
++		dev_err(&pdev->dev,
++			"failed to register panic notifier\n");
++		goto error_panic_notifier;
++	}
++
++	result = trusty_log_sfile_register(s);
++	if (result < 0) {
++		dev_err(&pdev->dev, "failed to register log_sfile\n");
++		goto error_log_sfile;
++	}
++
++	platform_set_drvdata(pdev, s);
++
++	return 0;
++
++error_log_sfile:
++	atomic_notifier_chain_unregister(&panic_notifier_list,
++					 &s->panic_notifier);
++error_panic_notifier:
++	trusty_call_notifier_unregister(s->trusty_dev, &s->call_notifier);
++error_call_notifier:
++	trusty_std_call32(s->trusty_dev, SMC_SC_SHARED_LOG_RM,
++			  (u32)mem_id, (u32)(mem_id >> 32), 0);
++error_std_call:
++	if (WARN_ON(trusty_reclaim_memory(s->trusty_dev, mem_id, s->sg,
++					  s->log_num_pages))) {
++		dev_err(&pdev->dev, "trusty_revoke_memory failed: %d 0x%llx\n",
++			result, mem_id);
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++	} else {
++err_share_memory:
++		vfree(s->log);
++	}
++error_alloc_log:
++	kfree(s->sg);
++error_alloc_sg:
++	kfree(s);
++error_alloc_state:
++	return result;
++}
++
++static int trusty_log_probe(struct platform_device *pdev)
++{
++	int rc;
++
++	if (!trusty_supports_logging(pdev->dev.parent))
++		return -ENXIO;
++
++	rc = trusty_log_init(pdev);
++	if (rc && log_size_param > TRUSTY_LOG_MIN_SIZE) {
++		dev_warn(&pdev->dev, "init failed, retrying with 1-page log\n");
++		log_size_param = TRUSTY_LOG_MIN_SIZE;
++		rc = trusty_log_init(pdev);
++	}
++	return rc;
++}
++
++static int trusty_log_remove(struct platform_device *pdev)
++{
++	int result;
++	struct trusty_log_state *s = platform_get_drvdata(pdev);
++	trusty_shared_mem_id_t mem_id = s->log_pages_shared_mem_id;
++
++	trusty_log_sfile_unregister(s);
++	atomic_notifier_chain_unregister(&panic_notifier_list,
++					 &s->panic_notifier);
++	trusty_call_notifier_unregister(s->trusty_dev, &s->call_notifier);
++
++	result = trusty_std_call32(s->trusty_dev, SMC_SC_SHARED_LOG_RM,
++				   (u32)mem_id, (u32)(mem_id >> 32), 0);
++	if (result) {
++		dev_err(&pdev->dev,
++			"trusty std call (SMC_SC_SHARED_LOG_RM) failed: %d\n",
++			result);
++	}
++	result = trusty_reclaim_memory(s->trusty_dev, mem_id, s->sg,
++				       s->log_num_pages);
++	if (WARN_ON(result)) {
++		dev_err(&pdev->dev,
++			"trusty failed to remove shared memory: %d\n", result);
++	} else {
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++		vfree(s->log);
++	}
++	kfree(s->sg);
++	kfree(s);
++
++	return 0;
++}
++
++static const struct of_device_id trusty_test_of_match[] = {
++	{ .compatible = "android,trusty-log-v1", },
++	{},
++};
++
++MODULE_DEVICE_TABLE(trusty, trusty_test_of_match);
++
++static struct platform_driver trusty_log_driver = {
++	.probe = trusty_log_probe,
++	.remove = trusty_log_remove,
++	.driver = {
++		.name = "trusty-log",
++		.of_match_table = trusty_test_of_match,
++	},
++};
++
++module_platform_driver(trusty_log_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Trusty logging driver");
+diff --git a/drivers/trusty/trusty-log.h b/drivers/trusty/trusty-log.h
+new file mode 100644
+index 000000000000..7b5e6096b51e
+--- /dev/null
++++ b/drivers/trusty/trusty-log.h
+@@ -0,0 +1,28 @@
++/* SPDX-License-Identifier: MIT */
++/*
++ * Copyright (c) 2015 Google, Inc.
++ *
++ * Trusty also has a copy of this header.  Please keep the copies in sync.
++ */
++#ifndef _TRUSTY_LOG_H_
++#define _TRUSTY_LOG_H_
++
++/*
++ * Ring buffer that supports one secure producer thread and one
++ * linux side consumer thread.
++ */
++struct log_rb {
++	volatile uint32_t alloc;
++	volatile uint32_t put;
++	uint32_t sz;
++	volatile char data[];
++} __packed;
++
++#define SMC_SC_SHARED_LOG_VERSION	SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 0)
++#define SMC_SC_SHARED_LOG_ADD		SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 1)
++#define SMC_SC_SHARED_LOG_RM		SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 2)
++
++#define TRUSTY_LOG_API_VERSION	1
++
++#endif
++
+diff --git a/drivers/trusty/trusty-mem.c b/drivers/trusty/trusty-mem.c
+new file mode 100644
+index 000000000000..8a360298e501
+--- /dev/null
++++ b/drivers/trusty/trusty-mem.c
+@@ -0,0 +1,139 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2015 Google, Inc.
++ */
++
++#include <linux/types.h>
++#include <linux/printk.h>
++#include <linux/trusty/arm_ffa.h>
++#include <linux/trusty/trusty.h>
++#include <linux/trusty/smcall.h>
++
++#define MEM_ATTR_STRONGLY_ORDERED (0x00U)
++#define MEM_ATTR_DEVICE (0x04U)
++#define MEM_ATTR_NORMAL_NON_CACHEABLE (0x44U)
++#define MEM_ATTR_NORMAL_WRITE_THROUGH (0xAAU)
++#define MEM_ATTR_NORMAL_WRITE_BACK_READ_ALLOCATE (0xEEU)
++#define MEM_ATTR_NORMAL_WRITE_BACK_WRITE_ALLOCATE (0xFFU)
++
++#define ATTR_RDONLY (1U << 7)
++#define ATTR_INNER_SHAREABLE (3U << 8)
++
++static int get_mem_attr(struct page *page, pgprot_t pgprot)
++{
++#if defined(CONFIG_ARM64)
++	u64 mair;
++	unsigned int attr_index = (pgprot_val(pgprot) & PTE_ATTRINDX_MASK) >> 2;
++
++	asm ("mrs %0, mair_el1\n" : "=&r" (mair));
++	return (mair >> (attr_index * 8)) & 0xff;
++
++#elif defined(CONFIG_ARM_LPAE)
++	u32 mair;
++	unsigned int attr_index = ((pgprot_val(pgprot) & L_PTE_MT_MASK) >> 2);
++
++	if (attr_index >= 4) {
++		attr_index -= 4;
++		asm volatile("mrc p15, 0, %0, c10, c2, 1\n" : "=&r" (mair));
++	} else {
++		asm volatile("mrc p15, 0, %0, c10, c2, 0\n" : "=&r" (mair));
++	}
++	return (mair >> (attr_index * 8)) & 0xff;
++
++#elif defined(CONFIG_ARM)
++	/* check memory type */
++	switch (pgprot_val(pgprot) & L_PTE_MT_MASK) {
++	case L_PTE_MT_WRITEALLOC:
++		return MEM_ATTR_NORMAL_WRITE_BACK_WRITE_ALLOCATE;
++
++	case L_PTE_MT_BUFFERABLE:
++		return MEM_ATTR_NORMAL_NON_CACHEABLE;
++
++	case L_PTE_MT_WRITEBACK:
++		return MEM_ATTR_NORMAL_WRITE_BACK_READ_ALLOCATE;
++
++	case L_PTE_MT_WRITETHROUGH:
++		return MEM_ATTR_NORMAL_WRITE_THROUGH;
++
++	case L_PTE_MT_UNCACHED:
++		return MEM_ATTR_STRONGLY_ORDERED;
++
++	case L_PTE_MT_DEV_SHARED:
++	case L_PTE_MT_DEV_NONSHARED:
++		return MEM_ATTR_DEVICE;
++
++	default:
++		return -EINVAL;
++	}
++#else
++	return 0;
++#endif
++}
++
++int trusty_encode_page_info(struct ns_mem_page_info *inf,
++			    struct page *page, pgprot_t pgprot)
++{
++	int mem_attr;
++	u64 pte;
++	u8 ffa_mem_attr;
++	u8 ffa_mem_perm = 0;
++
++	if (!inf || !page)
++		return -EINVAL;
++
++	/* get physical address */
++	pte = (u64)page_to_phys(page);
++
++	/* get memory attributes */
++	mem_attr = get_mem_attr(page, pgprot);
++	if (mem_attr < 0)
++		return mem_attr;
++
++	switch (mem_attr) {
++	case MEM_ATTR_STRONGLY_ORDERED:
++		ffa_mem_attr = FFA_MEM_ATTR_DEVICE_NGNRNE;
++		break;
++
++	case MEM_ATTR_DEVICE:
++		ffa_mem_attr = FFA_MEM_ATTR_DEVICE_NGNRE;
++		break;
++
++	case MEM_ATTR_NORMAL_NON_CACHEABLE:
++		ffa_mem_attr = FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED;
++		break;
++
++	case MEM_ATTR_NORMAL_WRITE_BACK_READ_ALLOCATE:
++	case MEM_ATTR_NORMAL_WRITE_BACK_WRITE_ALLOCATE:
++		ffa_mem_attr = FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB;
++		break;
++
++	default:
++		return -EINVAL;
++	}
++
++	inf->paddr = pte;
++
++	/* add other attributes */
++#if defined(CONFIG_ARM64) || defined(CONFIG_ARM_LPAE)
++	pte |= pgprot_val(pgprot);
++#elif defined(CONFIG_ARM)
++	if (pgprot_val(pgprot) & L_PTE_RDONLY)
++		pte |= ATTR_RDONLY;
++	if (pgprot_val(pgprot) & L_PTE_SHARED)
++		pte |= ATTR_INNER_SHAREABLE; /* inner sharable */
++#endif
++
++	if (!(pte & ATTR_RDONLY))
++		ffa_mem_perm |= FFA_MEM_PERM_RW;
++	else
++		ffa_mem_perm |= FFA_MEM_PERM_RO;
++
++	if ((pte & ATTR_INNER_SHAREABLE) == ATTR_INNER_SHAREABLE)
++		ffa_mem_attr |= FFA_MEM_ATTR_INNER_SHAREABLE;
++
++	inf->ffa_mem_attr = ffa_mem_attr;
++	inf->ffa_mem_perm = ffa_mem_perm;
++	inf->compat_attr = (pte & 0x0000FFFFFFFFFFFFull) |
++			   ((u64)mem_attr << 48);
++	return 0;
++}
+diff --git a/drivers/trusty/trusty-smc-arm.S b/drivers/trusty/trusty-smc-arm.S
+new file mode 100644
+index 000000000000..8ff83547d33f
+--- /dev/null
++++ b/drivers/trusty/trusty-smc-arm.S
+@@ -0,0 +1,41 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2020 Google, Inc.
++ */
++
++#include <linux/linkage.h>
++
++.arch_extension sec
++
++ENTRY(trusty_smc8)
++    /* Save stack location where r3-r7 smc arguments are stored */
++    mov     r12, sp
++
++    /* Save original r4-r7 values as caller expects these to be preserved */
++    push    {r4-r7}
++
++    /* Save return value pointer and return address */
++    push    {r0, lr}
++
++    /* arm abi shifts arguments when returning a struct, shift them back */
++    mov     r0, r1
++    mov     r1, r2
++    mov     r2, r3
++
++    /* Load stack based arguments */
++    ldmia   r12, {r3-r7}
++
++    smc     #0
++
++    /* Restore return address and get return value pointer */
++    pop     {r12, lr}
++
++    /* Copy 8-register smc return value to struct smc_ret8 return value */
++    stmia   r12, {r0-r7}
++
++    /* Restore original r4-r7 values */
++    pop     {r4-r7}
++
++    /* Return */
++    bx      lr
++ENDPROC(trusty_smc8)
+diff --git a/drivers/trusty/trusty-smc-arm64.S b/drivers/trusty/trusty-smc-arm64.S
+new file mode 100644
+index 000000000000..14c8fed28a5e
+--- /dev/null
++++ b/drivers/trusty/trusty-smc-arm64.S
+@@ -0,0 +1,35 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2020 Google, Inc.
++ */
++
++#include <linux/linkage.h>
++
++.macro push ra, rb
++stp \ra, \rb, [sp,#-16]!
++.endm
++
++.macro pop ra, rb
++ldp \ra, \rb, [sp], #16
++.endm
++
++lr .req x30
++
++SYM_FUNC_START(trusty_smc8)
++    /*
++     * Save x8 (return value ptr) and lr. The SMC calling convention says el3
++     * does not need to preserve x8. The normal ABI does not require either x8
++     * or lr to be preserved.
++     */
++    push    x8, lr
++    smc     #0
++    pop     x8, lr
++
++    /* Copy 8-register smc return value to struct smc_ret8 return value */
++    stp     x0, x1, [x8], #16
++    stp     x2, x3, [x8], #16
++    stp     x4, x5, [x8], #16
++    stp     x6, x7, [x8], #16
++
++    ret
++SYM_FUNC_END(trusty_smc8)
+diff --git a/drivers/trusty/trusty-smc.h b/drivers/trusty/trusty-smc.h
+new file mode 100644
+index 000000000000..b53e5abb4d05
+--- /dev/null
++++ b/drivers/trusty/trusty-smc.h
+@@ -0,0 +1,26 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2020 Google, Inc.
++ */
++#ifndef _TRUSTY_SMC_H
++#define _TRUSTY_SMC_H
++
++#include <linux/types.h>
++
++struct smc_ret8 {
++	unsigned long r0;
++	unsigned long r1;
++	unsigned long r2;
++	unsigned long r3;
++	unsigned long r4;
++	unsigned long r5;
++	unsigned long r6;
++	unsigned long r7;
++};
++
++struct smc_ret8 trusty_smc8(unsigned long r0, unsigned long r1,
++			    unsigned long r2, unsigned long r3,
++			    unsigned long r4, unsigned long r5,
++			    unsigned long r6, unsigned long r7);
++
++#endif /* _TRUSTY_SMC_H */
+diff --git a/drivers/trusty/trusty-test.c b/drivers/trusty/trusty-test.c
+new file mode 100644
+index 000000000000..844868981fa5
+--- /dev/null
++++ b/drivers/trusty/trusty-test.c
+@@ -0,0 +1,440 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2020 Google, Inc.
++ */
++
++#include <linux/ctype.h>
++#include <linux/list.h>
++#include <linux/platform_device.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/trusty.h>
++#include <linux/scatterlist.h>
++#include <linux/slab.h>
++#include <linux/mm.h>
++#include <linux/mod_devicetable.h>
++#include <linux/module.h>
++
++#include "trusty-test.h"
++
++struct trusty_test_state {
++	struct device *dev;
++	struct device *trusty_dev;
++};
++
++struct trusty_test_shmem_obj {
++	struct list_head node;
++	size_t page_count;
++	struct page **pages;
++	void *buf;
++	struct sg_table sgt;
++	trusty_shared_mem_id_t mem_id;
++};
++
++/*
++ * Allocate a test object with @page_count number of pages, map it and add it to
++ * @list.
++ * For multi-page allocations, order the pages so they are not contiguous.
++ */
++static int trusty_test_alloc_obj(struct trusty_test_state *s,
++				 size_t page_count,
++				 struct list_head *list)
++{
++	size_t i;
++	int ret = -ENOMEM;
++	struct trusty_test_shmem_obj *obj;
++
++	obj = kzalloc(sizeof(*obj), GFP_KERNEL);
++	if (!obj)
++		goto err_alloc_obj;
++	obj->page_count = page_count;
++
++	obj->pages = kmalloc_array(page_count, sizeof(*obj->pages), GFP_KERNEL);
++	if (!obj->pages) {
++		ret = -ENOMEM;
++		dev_err(s->dev, "failed to allocate page array, count %zd\n",
++			page_count);
++		goto err_alloc_pages;
++	}
++
++	for (i = 0; i < page_count; i++) {
++		obj->pages[i] = alloc_page(GFP_KERNEL);
++		if (!obj->pages[i]) {
++			ret = -ENOMEM;
++			dev_err(s->dev, "failed to allocate page %zd/%zd\n",
++				i, page_count);
++			goto err_alloc_page;
++		}
++		if (i > 0 && obj->pages[i - 1] + 1 == obj->pages[i]) {
++			/* swap adacent pages to increase fragmentation */
++			swap(obj->pages[i - 1], obj->pages[i]);
++		}
++	}
++
++	obj->buf = vmap(obj->pages, page_count, VM_MAP, PAGE_KERNEL);
++	if (!obj->buf) {
++		ret = -ENOMEM;
++		dev_err(s->dev, "failed to map test buffer page count %zd\n",
++			page_count);
++		goto err_map_pages;
++	}
++
++	ret = sg_alloc_table_from_pages(&obj->sgt, obj->pages, page_count,
++					0, page_count * PAGE_SIZE, GFP_KERNEL);
++	if (ret) {
++		dev_err(s->dev, "sg_alloc_table_from_pages failed: %d\n", ret);
++		goto err_alloc_sgt;
++	}
++	list_add_tail(&obj->node, list);
++	dev_dbg(s->dev, "buffer has %d page runs\n", obj->sgt.nents);
++	return 0;
++
++err_alloc_sgt:
++	vunmap(obj->buf);
++err_map_pages:
++	for (i = page_count; i > 0; i--) {
++		__free_page(obj->pages[i - 1]);
++err_alloc_page:
++		;
++	}
++	kfree(obj->pages);
++err_alloc_pages:
++	kfree(obj);
++err_alloc_obj:
++	return ret;
++}
++
++/* Unlink, unmap and free a test object and its pages */
++static void trusty_test_free_obj(struct trusty_test_state *s,
++				 struct trusty_test_shmem_obj *obj)
++{
++	size_t i;
++
++	list_del(&obj->node);
++	sg_free_table(&obj->sgt);
++	vunmap(obj->buf);
++	for (i = obj->page_count; i > 0; i--)
++		__free_page(obj->pages[i - 1]);
++	kfree(obj->pages);
++	kfree(obj);
++}
++
++/*
++ * Share all the pages of all the test object in &obj_list.
++ * If sharing a test object fails, free it so that every test object that
++ * remains in @obj_list has been shared when this function returns.
++ * Return a error if any test object failed to be shared.
++ */
++static int trusty_test_share_objs(struct trusty_test_state *s,
++				  struct list_head *obj_list, size_t size)
++{
++	int ret = 0;
++	int tmpret;
++	struct trusty_test_shmem_obj *obj;
++	struct trusty_test_shmem_obj *next_obj;
++	ktime_t t1;
++	ktime_t t2;
++
++	list_for_each_entry_safe(obj, next_obj, obj_list, node) {
++		t1 = ktime_get();
++		tmpret = trusty_share_memory(s->trusty_dev, &obj->mem_id,
++					     obj->sgt.sgl, obj->sgt.nents,
++					     PAGE_KERNEL);
++		t2 = ktime_get();
++		if (tmpret) {
++			ret = tmpret;
++			dev_err(s->dev,
++				"trusty_share_memory failed: %d, size=%zd\n",
++				ret, size);
++
++			/*
++			 * Free obj and continue, so we can revoke the
++			 * whole list in trusty_test_reclaim_objs.
++			 */
++			trusty_test_free_obj(s, obj);
++		}
++		dev_dbg(s->dev, "share id=0x%llx, size=%zu took %lld ns\n",
++			obj->mem_id, size,
++			ktime_to_ns(ktime_sub(t2, t1)));
++	}
++
++	return ret;
++}
++
++/* Reclaim memory shared with trusty for all test objects in @obj_list. */
++static int trusty_test_reclaim_objs(struct trusty_test_state *s,
++				    struct list_head *obj_list, size_t size)
++{
++	int ret = 0;
++	int tmpret;
++	struct trusty_test_shmem_obj *obj;
++	struct trusty_test_shmem_obj *next_obj;
++	ktime_t t1;
++	ktime_t t2;
++
++	list_for_each_entry_safe(obj, next_obj, obj_list, node) {
++		t1 = ktime_get();
++		tmpret = trusty_reclaim_memory(s->trusty_dev, obj->mem_id,
++					       obj->sgt.sgl, obj->sgt.nents);
++		t2 = ktime_get();
++		if (tmpret) {
++			ret = tmpret;
++			dev_err(s->dev,
++				"trusty_reclaim_memory failed: %d, id=0x%llx\n",
++				ret, obj->mem_id);
++
++			/*
++			 * It is not safe to free this memory if
++			 * trusty_reclaim_memory fails. Leak it in that
++			 * case.
++			 */
++			list_del(&obj->node);
++		}
++		dev_dbg(s->dev, "revoke id=0x%llx, size=%zu took %lld ns\n",
++			obj->mem_id, size,
++			ktime_to_ns(ktime_sub(t2, t1)));
++	}
++
++	return ret;
++}
++
++/*
++ * Test a test object. First, initialize the memory, then make a std call into
++ * trusty which will read it and return an error if the initialized value does
++ * not match what it expects. If trusty reads the correct values, it will modify
++ * the memory and return 0. This function then checks that it can read the
++ * correct modified value.
++ */
++static int trusty_test_rw(struct trusty_test_state *s,
++			  struct trusty_test_shmem_obj *obj)
++{
++	size_t size = obj->page_count * PAGE_SIZE;
++	int ret;
++	size_t i;
++	u64 *buf = obj->buf;
++	ktime_t t1;
++	ktime_t t2;
++
++	for (i = 0; i < size / sizeof(*buf); i++)
++		buf[i] = i;
++
++	t1 = ktime_get();
++	ret = trusty_std_call32(s->trusty_dev, SMC_SC_TEST_SHARED_MEM_RW,
++				(u32)(obj->mem_id), (u32)(obj->mem_id >> 32),
++				size);
++	t2 = ktime_get();
++	if (ret < 0) {
++		dev_err(s->dev,
++			"trusty std call (SMC_SC_TEST_SHARED_MEM_RW) failed: %d 0x%llx\n",
++			ret, obj->mem_id);
++		return ret;
++	}
++
++	for (i = 0; i < size / sizeof(*buf); i++) {
++		if (buf[i] != size - i) {
++			dev_err(s->dev,
++				"input mismatch at %zd, got 0x%llx instead of 0x%zx\n",
++				i, buf[i], size - i);
++			return -EIO;
++		}
++	}
++
++	dev_dbg(s->dev, "rw id=0x%llx, size=%zu took %lld ns\n", obj->mem_id,
++		size, ktime_to_ns(ktime_sub(t2, t1)));
++
++	return 0;
++}
++
++/*
++ * Run test on every test object in @obj_list. Repeat @repeat_access times.
++ */
++static int trusty_test_rw_objs(struct trusty_test_state *s,
++			       struct list_head *obj_list,
++			       size_t repeat_access)
++{
++	int ret;
++	size_t i;
++	struct trusty_test_shmem_obj *obj;
++
++	for (i = 0; i < repeat_access; i++) {
++		/*
++		 * Repeat test in case the memory attributes don't match
++		 * and either side see old data.
++		 */
++		list_for_each_entry(obj, obj_list, node) {
++			ret = trusty_test_rw(s, obj);
++			if (ret)
++				return ret;
++		}
++	}
++
++	return 0;
++}
++
++/*
++ * Allocate @obj_count test object that each have @page_count pages. Share each
++ * object @repeat_share times, each time running tests on every object
++ * @repeat_access times.
++ */
++static int trusty_test_run(struct trusty_test_state *s, size_t page_count,
++			   size_t obj_count, size_t repeat_share,
++			   size_t repeat_access)
++{
++	int ret = 0;
++	int tmpret;
++	size_t i;
++	size_t size = page_count * PAGE_SIZE;
++	LIST_HEAD(obj_list);
++	struct trusty_test_shmem_obj *obj;
++	struct trusty_test_shmem_obj *next_obj;
++
++	for (i = 0; i < obj_count && !ret; i++)
++		ret = trusty_test_alloc_obj(s, page_count, &obj_list);
++
++	for (i = 0; i < repeat_share && !ret; i++) {
++		ret = trusty_test_share_objs(s, &obj_list, size);
++		if (ret) {
++			dev_err(s->dev,
++				"trusty_share_memory failed: %d, i=%zd/%zd, size=%zd\n",
++				ret, i, repeat_share, size);
++		} else {
++			ret = trusty_test_rw_objs(s, &obj_list, repeat_access);
++			if (ret)
++				dev_err(s->dev,
++					"test failed: %d, i=%zd/%zd, size=%zd\n",
++					ret, i, repeat_share, size);
++		}
++		tmpret = trusty_test_reclaim_objs(s, &obj_list, size);
++		if (tmpret) {
++			ret = tmpret;
++			dev_err(s->dev,
++				"trusty_reclaim_memory failed: %d, i=%zd/%zd\n",
++				ret, i, repeat_share);
++		}
++	}
++
++	list_for_each_entry_safe(obj, next_obj, &obj_list, node)
++		trusty_test_free_obj(s, obj);
++
++	dev_info(s->dev, "[ %s ] size %zd, obj_count %zd, repeat_share %zd, repeat_access %zd\n",
++		 ret ? "FAILED" : "PASSED", size, obj_count, repeat_share,
++		 repeat_access);
++
++	return ret;
++}
++
++/*
++ * Get an optional numeric argument from @buf, update @buf and return the value.
++ * If @buf does not start with ",", return @default_val instead.
++ */
++static size_t trusty_test_get_arg(const char **buf, size_t default_val)
++{
++	char *buf_next;
++	size_t ret;
++
++	if (**buf != ',')
++		return default_val;
++
++	(*buf)++;
++	ret = simple_strtoul(*buf, &buf_next, 0);
++	if (buf_next == *buf)
++		return default_val;
++
++	*buf = buf_next;
++
++	return ret;
++}
++
++/*
++ * Run tests described by a string in this format:
++ * <obj_size>,<obj_count=1>,<repeat_share=1>,<repeat_access=3>
++ */
++static ssize_t trusty_test_run_store(struct device *dev,
++				     struct device_attribute *attr,
++				     const char *buf, size_t count)
++{
++	struct platform_device *pdev = to_platform_device(dev);
++	struct trusty_test_state *s = platform_get_drvdata(pdev);
++	size_t size;
++	size_t obj_count;
++	size_t repeat_share;
++	size_t repeat_access;
++	int ret;
++	char *buf_next;
++
++	while (true) {
++		while (isspace(*buf))
++			buf++;
++		size = simple_strtoul(buf, &buf_next, 0);
++		if (buf_next == buf)
++			return count;
++		buf = buf_next;
++		obj_count = trusty_test_get_arg(&buf, 1);
++		repeat_share = trusty_test_get_arg(&buf, 1);
++		repeat_access = trusty_test_get_arg(&buf, 3);
++
++		ret = trusty_test_run(s, DIV_ROUND_UP(size, PAGE_SIZE),
++				      obj_count, repeat_share, repeat_access);
++		if (ret)
++			return ret;
++	}
++}
++
++static DEVICE_ATTR_WO(trusty_test_run);
++
++static struct attribute *trusty_test_attrs[] = {
++	&dev_attr_trusty_test_run.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(trusty_test);
++
++static int trusty_test_probe(struct platform_device *pdev)
++{
++	struct trusty_test_state *s;
++	int ret;
++
++	ret = trusty_std_call32(pdev->dev.parent, SMC_SC_TEST_VERSION,
++				TRUSTY_STDCALLTEST_API_VERSION, 0, 0);
++	if (ret != TRUSTY_STDCALLTEST_API_VERSION)
++		return -ENOENT;
++
++	s = kzalloc(sizeof(*s), GFP_KERNEL);
++	if (!s)
++		return -ENOMEM;
++
++	s->dev = &pdev->dev;
++	s->trusty_dev = s->dev->parent;
++
++	platform_set_drvdata(pdev, s);
++
++	return 0;
++}
++
++static int trusty_test_remove(struct platform_device *pdev)
++{
++	struct trusty_log_state *s = platform_get_drvdata(pdev);
++
++	kfree(s);
++	return 0;
++}
++
++static const struct of_device_id trusty_test_of_match[] = {
++	{ .compatible = "android,trusty-test-v1", },
++	{},
++};
++
++MODULE_DEVICE_TABLE(trusty, trusty_test_of_match);
++
++static struct platform_driver trusty_test_driver = {
++	.probe = trusty_test_probe,
++	.remove = trusty_test_remove,
++	.driver = {
++		.name = "trusty-test",
++		.of_match_table = trusty_test_of_match,
++		.dev_groups = trusty_test_groups,
++	},
++};
++
++module_platform_driver(trusty_test_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Trusty test driver");
+diff --git a/drivers/trusty/trusty-test.h b/drivers/trusty/trusty-test.h
+new file mode 100644
+index 000000000000..eea7beb96876
+--- /dev/null
++++ b/drivers/trusty/trusty-test.h
+@@ -0,0 +1,13 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (c) 2020 Google, Inc.
++ */
++#ifndef _TRUSTY_TEST_H
++#define _TRUSTY_TEST_H
++
++#define SMC_SC_TEST_VERSION SMC_STDCALL_NR(SMC_ENTITY_TEST, 0)
++#define SMC_SC_TEST_SHARED_MEM_RW SMC_STDCALL_NR(SMC_ENTITY_TEST, 1)
++
++#define TRUSTY_STDCALLTEST_API_VERSION 1
++
++#endif /* _TRUSTY_TEST_H */
+diff --git a/drivers/trusty/trusty-virtio.c b/drivers/trusty/trusty-virtio.c
+new file mode 100644
+index 000000000000..fea59cd2e218
+--- /dev/null
++++ b/drivers/trusty/trusty-virtio.c
+@@ -0,0 +1,840 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Trusty Virtio driver
++ *
++ * Copyright (C) 2015 Google, Inc.
++ */
++#include <linux/device.h>
++#include <linux/err.h>
++#include <linux/kernel.h>
++
++#include <linux/dma-map-ops.h>
++#include <linux/module.h>
++#include <linux/mutex.h>
++#include <linux/notifier.h>
++#include <linux/workqueue.h>
++#include <linux/remoteproc.h>
++#include <linux/slab.h>
++
++#include <linux/platform_device.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/trusty.h>
++#include <linux/trusty/trusty_ipc.h>
++
++#include <linux/virtio.h>
++#include <linux/virtio_config.h>
++#include <linux/virtio_ids.h>
++#include <linux/virtio_ring.h>
++
++#include <linux/atomic.h>
++
++#define  RSC_DESCR_VER  1
++
++struct trusty_vdev;
++
++struct trusty_ctx {
++	struct device		*dev;
++	void			*shared_va;
++	struct scatterlist	shared_sg;
++	trusty_shared_mem_id_t	shared_id;
++	size_t			shared_sz;
++	struct work_struct	check_vqs;
++	struct work_struct	kick_vqs;
++	struct notifier_block	call_notifier;
++	struct list_head	vdev_list;
++	struct mutex		mlock; /* protects vdev_list */
++	struct workqueue_struct	*kick_wq;
++	struct workqueue_struct	*check_wq;
++};
++
++struct trusty_vring {
++	void			*vaddr;
++	struct scatterlist	sg;
++	trusty_shared_mem_id_t	shared_mem_id;
++	size_t			size;
++	unsigned int		align;
++	unsigned int		elem_num;
++	u32			notifyid;
++	atomic_t		needs_kick;
++	struct fw_rsc_vdev_vring *vr_descr;
++	struct virtqueue	*vq;
++	struct trusty_vdev	*tvdev;
++	struct trusty_nop	kick_nop;
++};
++
++struct trusty_vdev {
++	struct list_head	node;
++	struct virtio_device	vdev;
++	struct trusty_ctx	*tctx;
++	u32			notifyid;
++	unsigned int		config_len;
++	void			*config;
++	struct fw_rsc_vdev	*vdev_descr;
++	unsigned int		vring_num;
++	struct trusty_vring	vrings[];
++};
++
++#define vdev_to_tvdev(vd)  container_of((vd), struct trusty_vdev, vdev)
++
++static void check_all_vqs(struct work_struct *work)
++{
++	unsigned int i;
++	struct trusty_ctx *tctx = container_of(work, struct trusty_ctx,
++					       check_vqs);
++	struct trusty_vdev *tvdev;
++
++	list_for_each_entry(tvdev, &tctx->vdev_list, node) {
++		for (i = 0; i < tvdev->vring_num; i++)
++			if (tvdev->vrings[i].vq)
++				vring_interrupt(0, tvdev->vrings[i].vq);
++	}
++}
++
++static int trusty_call_notify(struct notifier_block *nb,
++			      unsigned long action, void *data)
++{
++	struct trusty_ctx *tctx;
++
++	if (action != TRUSTY_CALL_RETURNED)
++		return NOTIFY_DONE;
++
++	tctx = container_of(nb, struct trusty_ctx, call_notifier);
++	queue_work(tctx->check_wq, &tctx->check_vqs);
++
++	return NOTIFY_OK;
++}
++
++static void kick_vq(struct trusty_ctx *tctx,
++		    struct trusty_vdev *tvdev,
++		    struct trusty_vring *tvr)
++{
++	int ret;
++
++	dev_dbg(tctx->dev, "%s: vdev_id=%d: vq_id=%d\n",
++		__func__, tvdev->notifyid, tvr->notifyid);
++
++	ret = trusty_std_call32(tctx->dev->parent, SMC_SC_VDEV_KICK_VQ,
++				tvdev->notifyid, tvr->notifyid, 0);
++	if (ret) {
++		dev_err(tctx->dev, "vq notify (%d, %d) returned %d\n",
++			tvdev->notifyid, tvr->notifyid, ret);
++	}
++}
++
++static void kick_vqs(struct work_struct *work)
++{
++	unsigned int i;
++	struct trusty_vdev *tvdev;
++	struct trusty_ctx *tctx = container_of(work, struct trusty_ctx,
++					       kick_vqs);
++	mutex_lock(&tctx->mlock);
++	list_for_each_entry(tvdev, &tctx->vdev_list, node) {
++		for (i = 0; i < tvdev->vring_num; i++) {
++			struct trusty_vring *tvr = &tvdev->vrings[i];
++
++			if (atomic_xchg(&tvr->needs_kick, 0))
++				kick_vq(tctx, tvdev, tvr);
++		}
++	}
++	mutex_unlock(&tctx->mlock);
++}
++
++static bool trusty_virtio_notify(struct virtqueue *vq)
++{
++	struct trusty_vring *tvr = vq->priv;
++	struct trusty_vdev *tvdev = tvr->tvdev;
++	struct trusty_ctx *tctx = tvdev->tctx;
++	u32 api_ver = trusty_get_api_version(tctx->dev->parent);
++
++	if (api_ver < TRUSTY_API_VERSION_SMP_NOP) {
++		atomic_set(&tvr->needs_kick, 1);
++		queue_work(tctx->kick_wq, &tctx->kick_vqs);
++	} else {
++		trusty_enqueue_nop(tctx->dev->parent, &tvr->kick_nop);
++	}
++
++	return true;
++}
++
++static int trusty_load_device_descr(struct trusty_ctx *tctx,
++				    trusty_shared_mem_id_t id, size_t sz)
++{
++	int ret;
++
++	dev_dbg(tctx->dev, "%s: %zu bytes @ id %llu\n", __func__, sz, id);
++
++	ret = trusty_std_call32(tctx->dev->parent, SMC_SC_VIRTIO_GET_DESCR,
++				(u32)id, id >> 32, sz);
++	if (ret < 0) {
++		dev_err(tctx->dev, "%s: virtio get descr returned (%d)\n",
++			__func__, ret);
++		return -ENODEV;
++	}
++	return ret;
++}
++
++static void trusty_virtio_stop(struct trusty_ctx *tctx,
++			       trusty_shared_mem_id_t id, size_t sz)
++{
++	int ret;
++
++	dev_dbg(tctx->dev, "%s: %zu bytes @ id %llu\n", __func__, sz, id);
++
++	ret = trusty_std_call32(tctx->dev->parent, SMC_SC_VIRTIO_STOP,
++				(u32)id, id >> 32, sz);
++	if (ret) {
++		dev_err(tctx->dev, "%s: virtio done returned (%d)\n",
++			__func__, ret);
++		return;
++	}
++}
++
++static int trusty_virtio_start(struct trusty_ctx *tctx,
++			       trusty_shared_mem_id_t id, size_t sz)
++{
++	int ret;
++
++	dev_dbg(tctx->dev, "%s: %zu bytes @ id %llu\n", __func__, sz, id);
++
++	ret = trusty_std_call32(tctx->dev->parent, SMC_SC_VIRTIO_START,
++				(u32)id, id >> 32, sz);
++	if (ret) {
++		dev_err(tctx->dev, "%s: virtio start returned (%d)\n",
++			__func__, ret);
++		return -ENODEV;
++	}
++	return 0;
++}
++
++static void trusty_virtio_reset(struct virtio_device *vdev)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++	struct trusty_ctx *tctx = tvdev->tctx;
++
++	dev_dbg(&vdev->dev, "reset vdev_id=%d\n", tvdev->notifyid);
++	trusty_std_call32(tctx->dev->parent, SMC_SC_VDEV_RESET,
++			  tvdev->notifyid, 0, 0);
++}
++
++static u64 trusty_virtio_get_features(struct virtio_device *vdev)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++
++	return tvdev->vdev_descr->dfeatures |
++		(1ULL << VIRTIO_F_ACCESS_PLATFORM);
++}
++
++static int trusty_virtio_finalize_features(struct virtio_device *vdev)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++	u64 features = vdev->features;
++
++	/*
++	 * We set VIRTIO_F_ACCESS_PLATFORM to enable the dma mapping hooks.
++	 * The other side does not need to know.
++	 */
++	features &= ~(1ULL << VIRTIO_F_ACCESS_PLATFORM);
++
++	/* Make sure we don't have any features > 32 bits! */
++	if (WARN_ON((u32)vdev->features != features))
++		return -EINVAL;
++
++	tvdev->vdev_descr->gfeatures = vdev->features;
++	return 0;
++}
++
++static void trusty_virtio_get_config(struct virtio_device *vdev,
++				     unsigned int offset, void *buf,
++				     unsigned int len)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++
++	dev_dbg(&vdev->dev, "%s: %d bytes @ offset %d\n",
++		__func__, len, offset);
++
++	if (tvdev->config) {
++		if (offset + len <= tvdev->config_len)
++			memcpy(buf, tvdev->config + offset, len);
++	}
++}
++
++static void trusty_virtio_set_config(struct virtio_device *vdev,
++				     unsigned int offset, const void *buf,
++				     unsigned int len)
++{
++}
++
++static u8 trusty_virtio_get_status(struct virtio_device *vdev)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++
++	return tvdev->vdev_descr->status;
++}
++
++static void trusty_virtio_set_status(struct virtio_device *vdev, u8 status)
++{
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++
++	tvdev->vdev_descr->status = status;
++}
++
++static void _del_vqs(struct virtio_device *vdev)
++{
++	unsigned int i;
++	int ret;
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++	struct trusty_vring *tvr = &tvdev->vrings[0];
++
++	for (i = 0; i < tvdev->vring_num; i++, tvr++) {
++		/* dequeue kick_nop */
++		trusty_dequeue_nop(tvdev->tctx->dev->parent, &tvr->kick_nop);
++
++		/* delete vq */
++		if (tvr->vq) {
++			vring_del_virtqueue(tvr->vq);
++			tvr->vq = NULL;
++		}
++		/* delete vring */
++		if (tvr->vaddr) {
++			ret = trusty_reclaim_memory(tvdev->tctx->dev->parent,
++						    tvr->shared_mem_id,
++						    &tvr->sg, 1);
++			if (WARN_ON(ret)) {
++				dev_err(&vdev->dev,
++					"trusty_revoke_memory failed: %d 0x%llx\n",
++					ret, tvr->shared_mem_id);
++				/*
++				 * It is not safe to free this memory if
++				 * trusty_revoke_memory fails. Leak it in that
++				 * case.
++				 */
++			} else {
++				free_pages_exact(tvr->vaddr, tvr->size);
++			}
++			tvr->vaddr = NULL;
++		}
++	}
++}
++
++static void trusty_virtio_del_vqs(struct virtio_device *vdev)
++{
++	_del_vqs(vdev);
++}
++
++
++static struct virtqueue *_find_vq(struct virtio_device *vdev,
++				  unsigned int id,
++				  void (*callback)(struct virtqueue *vq),
++				  const char *name,
++				  bool ctx)
++{
++	struct trusty_vring *tvr;
++	struct trusty_vdev *tvdev = vdev_to_tvdev(vdev);
++	phys_addr_t pa;
++	int ret;
++
++	if (!name)
++		return ERR_PTR(-EINVAL);
++
++	if (id >= tvdev->vring_num)
++		return ERR_PTR(-EINVAL);
++
++	tvr = &tvdev->vrings[id];
++
++	/* actual size of vring (in bytes) */
++	tvr->size = PAGE_ALIGN(vring_size(tvr->elem_num, tvr->align));
++
++	/* allocate memory for the vring. */
++	tvr->vaddr = alloc_pages_exact(tvr->size, GFP_KERNEL | __GFP_ZERO);
++	if (!tvr->vaddr) {
++		dev_err(&vdev->dev, "vring alloc failed\n");
++		return ERR_PTR(-ENOMEM);
++	}
++
++	sg_init_one(&tvr->sg, tvr->vaddr, tvr->size);
++	ret = trusty_share_memory_compat(tvdev->tctx->dev->parent,
++					 &tvr->shared_mem_id, &tvr->sg, 1,
++					 PAGE_KERNEL);
++	if (ret) {
++		pa = virt_to_phys(tvr->vaddr);
++		dev_err(&vdev->dev, "trusty_share_memory failed: %d %pa\n",
++			ret, &pa);
++		goto err_share_memory;
++	}
++
++	/* save vring address to shared structure */
++	tvr->vr_descr->da = (u32)tvr->shared_mem_id;
++
++	/* da field is only 32 bit wide. Use previously unused 'reserved' field
++	 * to store top 32 bits of 64-bit shared_mem_id
++	 */
++	tvr->vr_descr->pa = (u32)(tvr->shared_mem_id >> 32);
++
++	dev_info(&vdev->dev, "vring%d: va(id)  %p(%llx) qsz %d notifyid %d\n",
++		 id, tvr->vaddr, (u64)tvr->shared_mem_id, tvr->elem_num,
++		 tvr->notifyid);
++
++	tvr->vq = vring_new_virtqueue(id, tvr->elem_num, tvr->align,
++				      vdev, true, ctx, tvr->vaddr,
++				      trusty_virtio_notify, callback, name);
++	if (!tvr->vq) {
++		dev_err(&vdev->dev, "vring_new_virtqueue %s failed\n",
++			name);
++		goto err_new_virtqueue;
++	}
++
++	tvr->vq->priv = tvr;
++
++	return tvr->vq;
++
++err_new_virtqueue:
++	ret = trusty_reclaim_memory(tvdev->tctx->dev->parent,
++				    tvr->shared_mem_id, &tvr->sg, 1);
++	if (WARN_ON(ret)) {
++		dev_err(&vdev->dev, "trusty_revoke_memory failed: %d 0x%llx\n",
++			ret, tvr->shared_mem_id);
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++	} else {
++err_share_memory:
++		free_pages_exact(tvr->vaddr, tvr->size);
++	}
++	tvr->vaddr = NULL;
++	return ERR_PTR(-ENOMEM);
++}
++
++static int trusty_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
++				  struct virtqueue *vqs[],
++				  vq_callback_t *callbacks[],
++				  const char * const names[],
++				  const bool *ctxs,
++				  struct irq_affinity *desc)
++{
++	unsigned int i;
++	int ret;
++	bool ctx = false;
++
++	for (i = 0; i < nvqs; i++) {
++		ctx = false;
++		if (ctxs)
++			ctx = ctxs[i];
++		vqs[i] = _find_vq(vdev, i, callbacks[i], names[i], ctx);
++		if (IS_ERR(vqs[i])) {
++			ret = PTR_ERR(vqs[i]);
++			_del_vqs(vdev);
++			return ret;
++		}
++	}
++	return 0;
++}
++
++static const char *trusty_virtio_bus_name(struct virtio_device *vdev)
++{
++	return "trusty-virtio";
++}
++
++/* The ops structure which hooks everything together. */
++static const struct virtio_config_ops trusty_virtio_config_ops = {
++	.get_features = trusty_virtio_get_features,
++	.finalize_features = trusty_virtio_finalize_features,
++	.get = trusty_virtio_get_config,
++	.set = trusty_virtio_set_config,
++	.get_status = trusty_virtio_get_status,
++	.set_status = trusty_virtio_set_status,
++	.reset    = trusty_virtio_reset,
++	.find_vqs = trusty_virtio_find_vqs,
++	.del_vqs  = trusty_virtio_del_vqs,
++	.bus_name = trusty_virtio_bus_name,
++};
++
++static int trusty_virtio_add_device(struct trusty_ctx *tctx,
++				    struct fw_rsc_vdev *vdev_descr,
++				    struct fw_rsc_vdev_vring *vr_descr,
++				    void *config)
++{
++	int i, ret;
++	struct trusty_vdev *tvdev;
++
++	tvdev = kzalloc(struct_size(tvdev, vrings, vdev_descr->num_of_vrings),
++			GFP_KERNEL);
++	if (!tvdev)
++		return -ENOMEM;
++
++	/* setup vdev */
++	tvdev->tctx = tctx;
++	tvdev->vdev.dev.parent = tctx->dev;
++	tvdev->vdev.id.device  = vdev_descr->id;
++	tvdev->vdev.config = &trusty_virtio_config_ops;
++	tvdev->vdev_descr = vdev_descr;
++	tvdev->notifyid = vdev_descr->notifyid;
++
++	/* setup config */
++	tvdev->config = config;
++	tvdev->config_len = vdev_descr->config_len;
++
++	/* setup vrings and vdev resource */
++	tvdev->vring_num = vdev_descr->num_of_vrings;
++
++	for (i = 0; i < tvdev->vring_num; i++, vr_descr++) {
++		struct trusty_vring *tvr = &tvdev->vrings[i];
++
++		tvr->tvdev    = tvdev;
++		tvr->vr_descr = vr_descr;
++		tvr->align    = vr_descr->align;
++		tvr->elem_num = vr_descr->num;
++		tvr->notifyid = vr_descr->notifyid;
++		trusty_nop_init(&tvr->kick_nop, SMC_NC_VDEV_KICK_VQ,
++				tvdev->notifyid, tvr->notifyid);
++	}
++
++	/* register device */
++	ret = register_virtio_device(&tvdev->vdev);
++	if (ret) {
++		dev_err(tctx->dev,
++			"Failed (%d) to register device dev type %u\n",
++			ret, vdev_descr->id);
++		goto err_register;
++	}
++
++	/* add it to tracking list */
++	list_add_tail(&tvdev->node, &tctx->vdev_list);
++
++	return 0;
++
++err_register:
++	kfree(tvdev);
++	return ret;
++}
++
++static int trusty_parse_device_descr(struct trusty_ctx *tctx,
++				     void *descr_va, size_t descr_sz)
++{
++	u32 i;
++	struct resource_table *descr = descr_va;
++
++	if (descr_sz < sizeof(*descr)) {
++		dev_err(tctx->dev, "descr table is too small (0x%x)\n",
++			(int)descr_sz);
++		return -ENODEV;
++	}
++
++	if (descr->ver != RSC_DESCR_VER) {
++		dev_err(tctx->dev, "unexpected descr ver (0x%x)\n",
++			(int)descr->ver);
++		return -ENODEV;
++	}
++
++	if (descr_sz < (sizeof(*descr) + descr->num * sizeof(u32))) {
++		dev_err(tctx->dev, "descr table is too small (0x%x)\n",
++			(int)descr->ver);
++		return -ENODEV;
++	}
++
++	for (i = 0; i < descr->num; i++) {
++		struct fw_rsc_hdr *hdr;
++		struct fw_rsc_vdev *vd;
++		struct fw_rsc_vdev_vring *vr;
++		void *cfg;
++		size_t vd_sz;
++
++		u32 offset = descr->offset[i];
++
++		if (offset >= descr_sz) {
++			dev_err(tctx->dev, "offset is out of bounds (%u)\n",
++				offset);
++			return -ENODEV;
++		}
++
++		/* check space for rsc header */
++		if ((descr_sz - offset) < sizeof(struct fw_rsc_hdr)) {
++			dev_err(tctx->dev, "no space for rsc header (%u)\n",
++				offset);
++			return -ENODEV;
++		}
++		hdr = (struct fw_rsc_hdr *)((u8 *)descr + offset);
++		offset += sizeof(struct fw_rsc_hdr);
++
++		/* check type */
++		if (hdr->type != RSC_VDEV) {
++			dev_err(tctx->dev, "unsupported rsc type (%u)\n",
++				hdr->type);
++			continue;
++		}
++
++		/* got vdev: check space for vdev */
++		if ((descr_sz - offset) < sizeof(struct fw_rsc_vdev)) {
++			dev_err(tctx->dev, "no space for vdev descr (%u)\n",
++				offset);
++			return -ENODEV;
++		}
++		vd = (struct fw_rsc_vdev *)((u8 *)descr + offset);
++
++		/* check space for vrings and config area */
++		vd_sz = sizeof(struct fw_rsc_vdev) +
++			vd->num_of_vrings * sizeof(struct fw_rsc_vdev_vring) +
++			vd->config_len;
++
++		if ((descr_sz - offset) < vd_sz) {
++			dev_err(tctx->dev, "no space for vdev (%u)\n", offset);
++			return -ENODEV;
++		}
++		vr = (struct fw_rsc_vdev_vring *)vd->vring;
++		cfg = (void *)(vr + vd->num_of_vrings);
++
++		trusty_virtio_add_device(tctx, vd, vr, cfg);
++	}
++
++	return 0;
++}
++
++static void _remove_devices_locked(struct trusty_ctx *tctx)
++{
++	struct trusty_vdev *tvdev, *next;
++
++	list_for_each_entry_safe(tvdev, next, &tctx->vdev_list, node) {
++		list_del(&tvdev->node);
++		unregister_virtio_device(&tvdev->vdev);
++		kfree(tvdev);
++	}
++}
++
++static void trusty_virtio_remove_devices(struct trusty_ctx *tctx)
++{
++	mutex_lock(&tctx->mlock);
++	_remove_devices_locked(tctx);
++	mutex_unlock(&tctx->mlock);
++}
++
++static int trusty_virtio_add_devices(struct trusty_ctx *tctx)
++{
++	int ret;
++	int ret_tmp;
++	void *descr_va;
++	trusty_shared_mem_id_t descr_id;
++	size_t descr_sz;
++	size_t descr_buf_sz;
++
++	/* allocate buffer to load device descriptor into */
++	descr_buf_sz = PAGE_SIZE;
++	descr_va = alloc_pages_exact(descr_buf_sz, GFP_KERNEL | __GFP_ZERO);
++	if (!descr_va) {
++		dev_err(tctx->dev, "Failed to allocate shared area\n");
++		return -ENOMEM;
++	}
++
++	sg_init_one(&tctx->shared_sg, descr_va, descr_buf_sz);
++	ret = trusty_share_memory(tctx->dev->parent, &descr_id,
++				  &tctx->shared_sg, 1, PAGE_KERNEL);
++	if (ret) {
++		dev_err(tctx->dev, "trusty_share_memory failed: %d\n", ret);
++		goto err_share_memory;
++	}
++
++	/* load device descriptors */
++	ret = trusty_load_device_descr(tctx, descr_id, descr_buf_sz);
++	if (ret < 0) {
++		dev_err(tctx->dev, "failed (%d) to load device descr\n", ret);
++		goto err_load_descr;
++	}
++
++	descr_sz = (size_t)ret;
++
++	mutex_lock(&tctx->mlock);
++
++	/* parse device descriptor and add virtio devices */
++	ret = trusty_parse_device_descr(tctx, descr_va, descr_sz);
++	if (ret) {
++		dev_err(tctx->dev, "failed (%d) to parse device descr\n", ret);
++		goto err_parse_descr;
++	}
++
++	/* register call notifier */
++	ret = trusty_call_notifier_register(tctx->dev->parent,
++					    &tctx->call_notifier);
++	if (ret) {
++		dev_err(tctx->dev, "%s: failed (%d) to register notifier\n",
++			__func__, ret);
++		goto err_register_notifier;
++	}
++
++	/* start virtio */
++	ret = trusty_virtio_start(tctx, descr_id, descr_sz);
++	if (ret) {
++		dev_err(tctx->dev, "failed (%d) to start virtio\n", ret);
++		goto err_start_virtio;
++	}
++
++	/* attach shared area */
++	tctx->shared_va = descr_va;
++	tctx->shared_id = descr_id;
++	tctx->shared_sz = descr_buf_sz;
++
++	mutex_unlock(&tctx->mlock);
++
++	return 0;
++
++err_start_virtio:
++	trusty_call_notifier_unregister(tctx->dev->parent,
++					&tctx->call_notifier);
++	cancel_work_sync(&tctx->check_vqs);
++err_register_notifier:
++err_parse_descr:
++	_remove_devices_locked(tctx);
++	mutex_unlock(&tctx->mlock);
++	cancel_work_sync(&tctx->kick_vqs);
++	trusty_virtio_stop(tctx, descr_id, descr_sz);
++err_load_descr:
++	ret_tmp = trusty_reclaim_memory(tctx->dev->parent, descr_id,
++					&tctx->shared_sg, 1);
++	if (WARN_ON(ret_tmp)) {
++		dev_err(tctx->dev, "trusty_revoke_memory failed: %d 0x%llx\n",
++			ret_tmp, tctx->shared_id);
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++	} else {
++err_share_memory:
++		free_pages_exact(descr_va, descr_buf_sz);
++	}
++	return ret;
++}
++
++static dma_addr_t trusty_virtio_dma_map_page(struct device *dev,
++					     struct page *page,
++					     unsigned long offset, size_t size,
++					     enum dma_data_direction dir,
++					     unsigned long attrs)
++{
++	struct tipc_msg_buf *buf = page_to_virt(page) + offset;
++
++	return buf->buf_id;
++}
++
++static const struct dma_map_ops trusty_virtio_dma_map_ops = {
++	.map_page = trusty_virtio_dma_map_page,
++};
++
++static int trusty_virtio_probe(struct platform_device *pdev)
++{
++	int ret;
++	struct trusty_ctx *tctx;
++
++	tctx = kzalloc(sizeof(*tctx), GFP_KERNEL);
++	if (!tctx)
++		return -ENOMEM;
++
++	tctx->dev = &pdev->dev;
++	tctx->call_notifier.notifier_call = trusty_call_notify;
++	mutex_init(&tctx->mlock);
++	INIT_LIST_HEAD(&tctx->vdev_list);
++	INIT_WORK(&tctx->check_vqs, check_all_vqs);
++	INIT_WORK(&tctx->kick_vqs, kick_vqs);
++	platform_set_drvdata(pdev, tctx);
++
++	set_dma_ops(&pdev->dev, &trusty_virtio_dma_map_ops);
++
++	tctx->check_wq = alloc_workqueue("trusty-check-wq", WQ_UNBOUND, 0);
++	if (!tctx->check_wq) {
++		ret = -ENODEV;
++		dev_err(&pdev->dev, "Failed create trusty-check-wq\n");
++		goto err_create_check_wq;
++	}
++
++	tctx->kick_wq = alloc_workqueue("trusty-kick-wq",
++					WQ_UNBOUND | WQ_CPU_INTENSIVE, 0);
++	if (!tctx->kick_wq) {
++		ret = -ENODEV;
++		dev_err(&pdev->dev, "Failed create trusty-kick-wq\n");
++		goto err_create_kick_wq;
++	}
++
++	ret = trusty_virtio_add_devices(tctx);
++	if (ret) {
++		dev_err(&pdev->dev, "Failed to add virtio devices\n");
++		goto err_add_devices;
++	}
++
++	dev_info(&pdev->dev, "initializing done\n");
++	return 0;
++
++err_add_devices:
++	destroy_workqueue(tctx->kick_wq);
++err_create_kick_wq:
++	destroy_workqueue(tctx->check_wq);
++err_create_check_wq:
++	kfree(tctx);
++	return ret;
++}
++
++static int trusty_virtio_remove(struct platform_device *pdev)
++{
++	struct trusty_ctx *tctx = platform_get_drvdata(pdev);
++	int ret;
++
++	/* unregister call notifier and wait until workqueue is done */
++	trusty_call_notifier_unregister(tctx->dev->parent,
++					&tctx->call_notifier);
++	cancel_work_sync(&tctx->check_vqs);
++
++	/* remove virtio devices */
++	trusty_virtio_remove_devices(tctx);
++	cancel_work_sync(&tctx->kick_vqs);
++
++	/* destroy workqueues */
++	destroy_workqueue(tctx->kick_wq);
++	destroy_workqueue(tctx->check_wq);
++
++	/* notify remote that shared area goes away */
++	trusty_virtio_stop(tctx, tctx->shared_id, tctx->shared_sz);
++
++	/* free shared area */
++	ret = trusty_reclaim_memory(tctx->dev->parent, tctx->shared_id,
++				    &tctx->shared_sg, 1);
++	if (WARN_ON(ret)) {
++		dev_err(tctx->dev, "trusty_revoke_memory failed: %d 0x%llx\n",
++			ret, tctx->shared_id);
++		/*
++		 * It is not safe to free this memory if trusty_revoke_memory
++		 * fails. Leak it in that case.
++		 */
++	} else {
++		free_pages_exact(tctx->shared_va, tctx->shared_sz);
++	}
++
++	/* free context */
++	kfree(tctx);
++	return 0;
++}
++
++static const struct of_device_id trusty_of_match[] = {
++	{
++		.compatible = "android,trusty-virtio-v1",
++	},
++	{},
++};
++
++MODULE_DEVICE_TABLE(of, trusty_of_match);
++
++static struct platform_driver trusty_virtio_driver = {
++	.probe = trusty_virtio_probe,
++	.remove = trusty_virtio_remove,
++	.driver = {
++		.name = "trusty-virtio",
++		.of_match_table = trusty_of_match,
++	},
++};
++
++module_platform_driver(trusty_virtio_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Trusty virtio driver");
++/*
++ * TODO(b/168322325): trusty-virtio and trusty-ipc should be independent.
++ * However, trusty-virtio is not completely generic and is aware of trusty-ipc.
++ * See header includes. Particularly, trusty-virtio.ko can't be loaded before
++ * trusty-ipc.ko.
++ */
++MODULE_SOFTDEP("pre: trusty-ipc");
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+new file mode 100644
+index 000000000000..265eab52aea0
+--- /dev/null
++++ b/drivers/trusty/trusty.c
+@@ -0,0 +1,981 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2013 Google, Inc.
++ */
++
++#include <linux/delay.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_platform.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/stat.h>
++#include <linux/string.h>
++#include <linux/trusty/arm_ffa.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/sm_err.h>
++#include <linux/trusty/trusty.h>
++
++#include <linux/scatterlist.h>
++#include <linux/dma-mapping.h>
++
++#include "trusty-smc.h"
++
++struct trusty_state;
++static struct platform_driver trusty_driver;
++
++struct trusty_work {
++	struct trusty_state *ts;
++	struct work_struct work;
++};
++
++struct trusty_state {
++	struct mutex smc_lock;
++	struct atomic_notifier_head notifier;
++	struct completion cpu_idle_completion;
++	char *version_str;
++	u32 api_version;
++	bool trusty_panicked;
++	struct device *dev;
++	struct workqueue_struct *nop_wq;
++	struct trusty_work __percpu *nop_works;
++	struct list_head nop_queue;
++	spinlock_t nop_lock; /* protects nop_queue */
++	struct device_dma_parameters dma_parms;
++	void *ffa_tx;
++	void *ffa_rx;
++	u16 ffa_local_id;
++	u16 ffa_remote_id;
++	struct mutex share_memory_msg_lock; /* protects share_memory_msg */
++};
++
++static inline unsigned long smc(unsigned long r0, unsigned long r1,
++				unsigned long r2, unsigned long r3)
++{
++	return trusty_smc8(r0, r1, r2, r3, 0, 0, 0, 0).r0;
++}
++
++s32 trusty_fast_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(!s))
++		return SM_ERR_INVALID_PARAMETERS;
++	if (WARN_ON(!SMC_IS_FASTCALL(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++	if (WARN_ON(SMC_IS_SMC64(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++
++	return smc(smcnr, a0, a1, a2);
++}
++EXPORT_SYMBOL(trusty_fast_call32);
++
++#ifdef CONFIG_64BIT
++s64 trusty_fast_call64(struct device *dev, u64 smcnr, u64 a0, u64 a1, u64 a2)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(!s))
++		return SM_ERR_INVALID_PARAMETERS;
++	if (WARN_ON(!SMC_IS_FASTCALL(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++	if (WARN_ON(!SMC_IS_SMC64(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++
++	return smc(smcnr, a0, a1, a2);
++}
++EXPORT_SYMBOL(trusty_fast_call64);
++#endif
++
++static unsigned long trusty_std_call_inner(struct device *dev,
++					   unsigned long smcnr,
++					   unsigned long a0, unsigned long a1,
++					   unsigned long a2)
++{
++	unsigned long ret;
++	int retry = 5;
++
++	dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx)\n",
++		__func__, smcnr, a0, a1, a2);
++	while (true) {
++		ret = smc(smcnr, a0, a1, a2);
++		while ((s32)ret == SM_ERR_FIQ_INTERRUPTED)
++			ret = smc(SMC_SC_RESTART_FIQ, 0, 0, 0);
++		if ((int)ret != SM_ERR_BUSY || !retry)
++			break;
++
++		dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy, retry\n",
++			__func__, smcnr, a0, a1, a2);
++		retry--;
++	}
++
++	return ret;
++}
++
++static unsigned long trusty_std_call_helper(struct device *dev,
++					    unsigned long smcnr,
++					    unsigned long a0, unsigned long a1,
++					    unsigned long a2)
++{
++	unsigned long ret;
++	int sleep_time = 1;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	while (true) {
++		local_irq_disable();
++		atomic_notifier_call_chain(&s->notifier, TRUSTY_CALL_PREPARE,
++					   NULL);
++		ret = trusty_std_call_inner(dev, smcnr, a0, a1, a2);
++		if (ret == SM_ERR_PANIC) {
++			s->trusty_panicked = true;
++			if (IS_ENABLED(CONFIG_TRUSTY_CRASH_IS_PANIC))
++				panic("trusty crashed");
++			else
++				WARN_ONCE(1, "trusty crashed");
++		}
++
++		atomic_notifier_call_chain(&s->notifier, TRUSTY_CALL_RETURNED,
++					   NULL);
++		if (ret == SM_ERR_INTERRUPTED) {
++			/*
++			 * Make sure this cpu will eventually re-enter trusty
++			 * even if the std_call resumes on another cpu.
++			 */
++			trusty_enqueue_nop(dev, NULL);
++		}
++		local_irq_enable();
++
++		if ((int)ret != SM_ERR_BUSY)
++			break;
++
++		if (sleep_time == 256)
++			dev_warn(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy\n",
++				 __func__, smcnr, a0, a1, a2);
++		dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy, wait %d ms\n",
++			__func__, smcnr, a0, a1, a2, sleep_time);
++
++		msleep(sleep_time);
++		if (sleep_time < 1000)
++			sleep_time <<= 1;
++
++		dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) retry\n",
++			__func__, smcnr, a0, a1, a2);
++	}
++
++	if (sleep_time > 256)
++		dev_warn(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) busy cleared\n",
++			 __func__, smcnr, a0, a1, a2);
++
++	return ret;
++}
++
++static void trusty_std_call_cpu_idle(struct trusty_state *s)
++{
++	int ret;
++
++	ret = wait_for_completion_timeout(&s->cpu_idle_completion, HZ * 10);
++	if (!ret) {
++		dev_warn(s->dev,
++			 "%s: timed out waiting for cpu idle to clear, retry anyway\n",
++			 __func__);
++	}
++}
++
++s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
++{
++	int ret;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(SMC_IS_FASTCALL(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++
++	if (WARN_ON(SMC_IS_SMC64(smcnr)))
++		return SM_ERR_INVALID_PARAMETERS;
++
++	if (s->trusty_panicked) {
++		/*
++		 * Avoid calling the notifiers if trusty has panicked as they
++		 * can trigger more calls.
++		 */
++		return SM_ERR_PANIC;
++	}
++
++	if (smcnr != SMC_SC_NOP) {
++		mutex_lock(&s->smc_lock);
++		reinit_completion(&s->cpu_idle_completion);
++	}
++
++	dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) started\n",
++		__func__, smcnr, a0, a1, a2);
++
++	ret = trusty_std_call_helper(dev, smcnr, a0, a1, a2);
++	while (ret == SM_ERR_INTERRUPTED || ret == SM_ERR_CPU_IDLE) {
++		dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) interrupted\n",
++			__func__, smcnr, a0, a1, a2);
++		if (ret == SM_ERR_CPU_IDLE)
++			trusty_std_call_cpu_idle(s);
++		ret = trusty_std_call_helper(dev, SMC_SC_RESTART_LAST, 0, 0, 0);
++	}
++	dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) returned 0x%x\n",
++		__func__, smcnr, a0, a1, a2, ret);
++
++	if (smcnr == SMC_SC_NOP)
++		complete(&s->cpu_idle_completion);
++	else
++		mutex_unlock(&s->smc_lock);
++
++	return ret;
++}
++EXPORT_SYMBOL(trusty_std_call32);
++
++int trusty_share_memory(struct device *dev, u64 *id,
++			struct scatterlist *sglist, unsigned int nents,
++			pgprot_t pgprot)
++{
++	return trusty_transfer_memory(dev, id, sglist, nents, pgprot, 0,
++				      false);
++}
++EXPORT_SYMBOL(trusty_share_memory);
++
++int trusty_transfer_memory(struct device *dev, u64 *id,
++			   struct scatterlist *sglist, unsigned int nents,
++			   pgprot_t pgprot, u64 tag, bool lend)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	int ret;
++	struct ns_mem_page_info pg_inf;
++	struct scatterlist *sg;
++	size_t count;
++	size_t i;
++	size_t len;
++	u64 ffa_handle = 0;
++	size_t total_len;
++	size_t endpoint_count = 1;
++	struct ffa_mtd *mtd = s->ffa_tx;
++	size_t comp_mrd_offset = offsetof(struct ffa_mtd, emad[endpoint_count]);
++	struct ffa_comp_mrd *comp_mrd = s->ffa_tx + comp_mrd_offset;
++	struct ffa_cons_mrd *cons_mrd = comp_mrd->address_range_array;
++	size_t cons_mrd_offset = (void *)cons_mrd - s->ffa_tx;
++	struct smc_ret8 smc_ret;
++	u32 cookie_low;
++	u32 cookie_high;
++
++	if (WARN_ON(dev->driver != &trusty_driver.driver))
++		return -EINVAL;
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	if (nents != 1 && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		dev_err(s->dev, "%s: old trusty version does not support non-contiguous memory objects\n",
++			__func__);
++		return -EOPNOTSUPP;
++	}
++
++	count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++	if (count != nents) {
++		dev_err(s->dev, "failed to dma map sg_table\n");
++		return -EINVAL;
++	}
++
++	sg = sglist;
++	ret = trusty_encode_page_info(&pg_inf, phys_to_page(sg_dma_address(sg)),
++				      pgprot);
++	if (ret) {
++		dev_err(s->dev, "%s: trusty_encode_page_info failed\n",
++			__func__);
++		goto err_encode_page_info;
++	}
++
++	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		*id = pg_inf.compat_attr;
++		return 0;
++	}
++
++	len = 0;
++	for_each_sg(sglist, sg, nents, i)
++		len += sg_dma_len(sg);
++
++	mutex_lock(&s->share_memory_msg_lock);
++
++	mtd->sender_id = s->ffa_local_id;
++	mtd->memory_region_attributes = pg_inf.ffa_mem_attr;
++	mtd->reserved_3 = 0;
++	mtd->flags = 0;
++	mtd->handle = 0;
++	mtd->tag = tag;
++	mtd->reserved_24_27 = 0;
++	mtd->emad_count = endpoint_count;
++	for (i = 0; i < endpoint_count; i++) {
++		struct ffa_emad *emad = &mtd->emad[i];
++		/* TODO: support stream ids */
++		emad->mapd.endpoint_id = s->ffa_remote_id;
++		emad->mapd.memory_access_permissions = pg_inf.ffa_mem_perm;
++		emad->mapd.flags = 0;
++		emad->comp_mrd_offset = comp_mrd_offset;
++		emad->reserved_8_15 = 0;
++	}
++	comp_mrd->total_page_count = len / PAGE_SIZE;
++	comp_mrd->address_range_count = nents;
++	comp_mrd->reserved_8_15 = 0;
++
++	total_len = cons_mrd_offset + nents * sizeof(*cons_mrd);
++	sg = sglist;
++	while (count) {
++		size_t lcount =
++			min_t(size_t, count, (PAGE_SIZE - cons_mrd_offset) /
++			      sizeof(*cons_mrd));
++		size_t fragment_len = lcount * sizeof(*cons_mrd) +
++				      cons_mrd_offset;
++
++		for (i = 0; i < lcount; i++) {
++			cons_mrd[i].address = sg_dma_address(sg);
++			cons_mrd[i].page_count = sg_dma_len(sg) / PAGE_SIZE;
++			cons_mrd[i].reserved_12_15 = 0;
++			sg = sg_next(sg);
++		}
++		count -= lcount;
++		if (cons_mrd_offset) {
++			u32 smc = lend ? SMC_FC_FFA_MEM_LEND :
++					 SMC_FC_FFA_MEM_SHARE;
++			/* First fragment */
++			smc_ret = trusty_smc8(smc, total_len,
++					      fragment_len, 0, 0, 0, 0, 0);
++		} else {
++			smc_ret = trusty_smc8(SMC_FC_FFA_MEM_FRAG_TX,
++					      cookie_low, cookie_high,
++					      fragment_len, 0, 0, 0, 0);
++		}
++		if (smc_ret.r0 == SMC_FC_FFA_MEM_FRAG_RX) {
++			cookie_low = smc_ret.r1;
++			cookie_high = smc_ret.r2;
++			dev_dbg(s->dev, "cookie %x %x", cookie_low,
++				cookie_high);
++			if (!count) {
++				/*
++				 * We have sent all our descriptors. Expected
++				 * SMC_FC_FFA_SUCCESS, not a request to send
++				 * another fragment.
++				 */
++				dev_err(s->dev, "%s: fragment_len %zd/%zd, unexpected SMC_FC_FFA_MEM_FRAG_RX\n",
++					__func__, fragment_len, total_len);
++				ret = -EIO;
++				break;
++			}
++		} else if (smc_ret.r0 == SMC_FC_FFA_SUCCESS) {
++			ffa_handle = smc_ret.r2 | (u64)smc_ret.r3 << 32;
++			dev_dbg(s->dev, "%s: fragment_len %zu/%zu, got handle 0x%llx\n",
++				__func__, fragment_len, total_len,
++				ffa_handle);
++			if (count) {
++				/*
++				 * We have not sent all our descriptors.
++				 * Expected SMC_FC_FFA_MEM_FRAG_RX not
++				 * SMC_FC_FFA_SUCCESS.
++				 */
++				dev_err(s->dev, "%s: fragment_len %zu/%zu, unexpected SMC_FC_FFA_SUCCESS, count %zu != 0\n",
++					__func__, fragment_len, total_len,
++					count);
++				ret = -EIO;
++				break;
++			}
++		} else {
++			dev_err(s->dev, "%s: fragment_len %zu/%zu, SMC_FC_FFA_MEM_SHARE failed 0x%lx 0x%lx 0x%lx",
++				__func__, fragment_len, total_len,
++				smc_ret.r0, smc_ret.r1, smc_ret.r2);
++			ret = -EIO;
++			break;
++		}
++
++		cons_mrd = s->ffa_tx;
++		cons_mrd_offset = 0;
++	}
++
++	mutex_unlock(&s->share_memory_msg_lock);
++
++	if (!ret) {
++		*id = ffa_handle;
++		dev_dbg(s->dev, "%s: done\n", __func__);
++		return 0;
++	}
++
++	dev_err(s->dev, "%s: failed %d", __func__, ret);
++
++err_encode_page_info:
++	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++	return ret;
++}
++EXPORT_SYMBOL(trusty_transfer_memory);
++
++/*
++ * trusty_share_memory_compat - trusty_share_memory wrapper for old apis
++ *
++ * Call trusty_share_memory and filter out memory attributes if trusty version
++ * is old. Used by clients that used to pass just a physical address to trusty
++ * instead of a physical address plus memory attributes value.
++ */
++int trusty_share_memory_compat(struct device *dev, u64 *id,
++			       struct scatterlist *sglist, unsigned int nents,
++			       pgprot_t pgprot)
++{
++	int ret;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	ret = trusty_share_memory(dev, id, sglist, nents, pgprot);
++	if (!ret && s->api_version < TRUSTY_API_VERSION_PHYS_MEM_OBJ)
++		*id &= 0x0000FFFFFFFFF000ull;
++
++	return ret;
++}
++EXPORT_SYMBOL(trusty_share_memory_compat);
++
++int trusty_reclaim_memory(struct device *dev, u64 id,
++			  struct scatterlist *sglist, unsigned int nents)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	int ret = 0;
++	struct smc_ret8 smc_ret;
++
++	if (WARN_ON(dev->driver != &trusty_driver.driver))
++		return -EINVAL;
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		if (nents != 1) {
++			dev_err(s->dev, "%s: not supported\n", __func__);
++			return -EOPNOTSUPP;
++		}
++
++		dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++
++		dev_dbg(s->dev, "%s: done\n", __func__);
++		return 0;
++	}
++
++	mutex_lock(&s->share_memory_msg_lock);
++
++	smc_ret = trusty_smc8(SMC_FC_FFA_MEM_RECLAIM, (u32)id, id >> 32, 0, 0,
++			      0, 0, 0);
++	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
++		dev_err(s->dev, "%s: SMC_FC_FFA_MEM_RECLAIM failed 0x%lx 0x%lx 0x%lx",
++			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
++		if (smc_ret.r0 == SMC_FC_FFA_ERROR &&
++		    smc_ret.r2 == FFA_ERROR_DENIED)
++			ret = -EBUSY;
++		else
++			ret = -EIO;
++	}
++
++	mutex_unlock(&s->share_memory_msg_lock);
++
++	if (ret != 0)
++		return ret;
++
++	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++
++	dev_dbg(s->dev, "%s: done\n", __func__);
++	return 0;
++}
++EXPORT_SYMBOL(trusty_reclaim_memory);
++
++int trusty_call_notifier_register(struct device *dev, struct notifier_block *n)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	return atomic_notifier_chain_register(&s->notifier, n);
++}
++EXPORT_SYMBOL(trusty_call_notifier_register);
++
++int trusty_call_notifier_unregister(struct device *dev,
++				    struct notifier_block *n)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	return atomic_notifier_chain_unregister(&s->notifier, n);
++}
++EXPORT_SYMBOL(trusty_call_notifier_unregister);
++
++static int trusty_remove_child(struct device *dev, void *data)
++{
++	platform_device_unregister(to_platform_device(dev));
++	return 0;
++}
++
++static ssize_t trusty_version_show(struct device *dev,
++				   struct device_attribute *attr, char *buf)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	return scnprintf(buf, PAGE_SIZE, "%s\n", s->version_str ?: "unknown");
++}
++
++static DEVICE_ATTR(trusty_version, 0400, trusty_version_show, NULL);
++
++static struct attribute *trusty_attrs[] = {
++	&dev_attr_trusty_version.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(trusty);
++
++const char *trusty_version_str_get(struct device *dev)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	return s->version_str;
++}
++EXPORT_SYMBOL(trusty_version_str_get);
++
++static int trusty_init_msg_buf(struct trusty_state *s, struct device *dev)
++{
++	phys_addr_t tx_paddr;
++	phys_addr_t rx_paddr;
++	int ret;
++	struct smc_ret8 smc_ret;
++
++	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ)
++		return 0;
++
++	/* Get supported FF-A version and check if it is compatible */
++	smc_ret = trusty_smc8(SMC_FC_FFA_VERSION, FFA_CURRENT_VERSION, 0, 0,
++			      0, 0, 0, 0);
++	if (FFA_VERSION_TO_MAJOR(smc_ret.r0) != FFA_CURRENT_VERSION_MAJOR) {
++		dev_err(s->dev,
++			"%s: Unsupported FF-A version 0x%lx, expected 0x%x\n",
++			__func__, smc_ret.r0, FFA_CURRENT_VERSION);
++		ret = -EIO;
++		goto err_version;
++	}
++
++	/* Check that SMC_FC_FFA_MEM_SHARE is implemented */
++	smc_ret = trusty_smc8(SMC_FC_FFA_FEATURES, SMC_FC_FFA_MEM_SHARE, 0, 0,
++			      0, 0, 0, 0);
++	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
++		dev_err(s->dev,
++			"%s: SMC_FC_FFA_FEATURES(SMC_FC_FFA_MEM_SHARE) failed 0x%lx 0x%lx 0x%lx\n",
++			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
++		ret = -EIO;
++		goto err_features;
++	}
++
++	/*
++	 * Set FF-A endpoint IDs.
++	 *
++	 * Hardcode 0x8000 for the secure os.
++	 * TODO: Use FF-A call or device tree to configure this dynamically
++	 */
++	smc_ret = trusty_smc8(SMC_FC_FFA_ID_GET, 0, 0, 0, 0, 0, 0, 0);
++	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
++		dev_err(s->dev,
++			"%s: SMC_FC_FFA_ID_GET failed 0x%lx 0x%lx 0x%lx\n",
++			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
++		ret = -EIO;
++		goto err_id_get;
++	}
++
++	s->ffa_local_id = smc_ret.r2;
++	s->ffa_remote_id = 0x8000;
++
++	s->ffa_tx = kmalloc(PAGE_SIZE, GFP_KERNEL);
++	if (!s->ffa_tx) {
++		ret = -ENOMEM;
++		goto err_alloc_tx;
++	}
++	tx_paddr = virt_to_phys(s->ffa_tx);
++	if (WARN_ON(tx_paddr & (PAGE_SIZE - 1))) {
++		ret = -EINVAL;
++		goto err_unaligned_tx_buf;
++	}
++
++	s->ffa_rx = kmalloc(PAGE_SIZE, GFP_KERNEL);
++	if (!s->ffa_rx) {
++		ret = -ENOMEM;
++		goto err_alloc_rx;
++	}
++	rx_paddr = virt_to_phys(s->ffa_rx);
++	if (WARN_ON(rx_paddr & (PAGE_SIZE - 1))) {
++		ret = -EINVAL;
++		goto err_unaligned_rx_buf;
++	}
++
++	smc_ret = trusty_smc8(SMC_FCZ_FFA_RXTX_MAP, tx_paddr, rx_paddr, 1, 0,
++			      0, 0, 0);
++	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
++		dev_err(s->dev, "%s: SMC_FCZ_FFA_RXTX_MAP failed 0x%lx 0x%lx 0x%lx\n",
++			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
++		ret = -EIO;
++		goto err_rxtx_map;
++	}
++
++	return 0;
++
++err_rxtx_map:
++err_unaligned_rx_buf:
++	kfree(s->ffa_rx);
++	s->ffa_rx = NULL;
++err_alloc_rx:
++err_unaligned_tx_buf:
++	kfree(s->ffa_tx);
++	s->ffa_tx = NULL;
++err_alloc_tx:
++err_id_get:
++err_features:
++err_version:
++	return ret;
++}
++
++static void trusty_free_msg_buf(struct trusty_state *s, struct device *dev)
++{
++	struct smc_ret8 smc_ret;
++
++	smc_ret = trusty_smc8(SMC_FC_FFA_RXTX_UNMAP, 0, 0, 0, 0, 0, 0, 0);
++	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
++		dev_err(s->dev, "%s: SMC_FC_FFA_RXTX_UNMAP failed 0x%lx 0x%lx 0x%lx\n",
++			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
++	} else {
++		kfree(s->ffa_rx);
++		kfree(s->ffa_tx);
++	}
++}
++
++static void trusty_init_version(struct trusty_state *s, struct device *dev)
++{
++	int ret;
++	int i;
++	int version_str_len;
++
++	ret = trusty_fast_call32(dev, SMC_FC_GET_VERSION_STR, -1, 0, 0);
++	if (ret <= 0)
++		goto err_get_size;
++
++	version_str_len = ret;
++
++	s->version_str = kmalloc(version_str_len + 1, GFP_KERNEL);
++	for (i = 0; i < version_str_len; i++) {
++		ret = trusty_fast_call32(dev, SMC_FC_GET_VERSION_STR, i, 0, 0);
++		if (ret < 0)
++			goto err_get_char;
++		s->version_str[i] = ret;
++	}
++	s->version_str[i] = '\0';
++
++	dev_info(dev, "trusty version: %s\n", s->version_str);
++	return;
++
++err_get_char:
++	kfree(s->version_str);
++	s->version_str = NULL;
++err_get_size:
++	dev_err(dev, "failed to get version: %d\n", ret);
++}
++
++u32 trusty_get_api_version(struct device *dev)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	return s->api_version;
++}
++EXPORT_SYMBOL(trusty_get_api_version);
++
++bool trusty_get_panic_status(struct device *dev)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	if (WARN_ON(dev->driver != &trusty_driver.driver))
++		return false;
++	return s->trusty_panicked;
++}
++EXPORT_SYMBOL(trusty_get_panic_status);
++
++static int trusty_init_api_version(struct trusty_state *s, struct device *dev)
++{
++	u32 api_version;
++
++	api_version = trusty_fast_call32(dev, SMC_FC_API_VERSION,
++					 TRUSTY_API_VERSION_CURRENT, 0, 0);
++	if (api_version == SM_ERR_UNDEFINED_SMC)
++		api_version = 0;
++
++	if (api_version > TRUSTY_API_VERSION_CURRENT) {
++		dev_err(dev, "unsupported api version %u > %u\n",
++			api_version, TRUSTY_API_VERSION_CURRENT);
++		return -EINVAL;
++	}
++
++	dev_info(dev, "selected api version: %u (requested %u)\n",
++		 api_version, TRUSTY_API_VERSION_CURRENT);
++	s->api_version = api_version;
++
++	return 0;
++}
++
++static bool dequeue_nop(struct trusty_state *s, u32 *args)
++{
++	unsigned long flags;
++	struct trusty_nop *nop = NULL;
++
++	spin_lock_irqsave(&s->nop_lock, flags);
++	if (!list_empty(&s->nop_queue)) {
++		nop = list_first_entry(&s->nop_queue,
++				       struct trusty_nop, node);
++		list_del_init(&nop->node);
++		args[0] = nop->args[0];
++		args[1] = nop->args[1];
++		args[2] = nop->args[2];
++	} else {
++		args[0] = 0;
++		args[1] = 0;
++		args[2] = 0;
++	}
++	spin_unlock_irqrestore(&s->nop_lock, flags);
++	return nop;
++}
++
++static void locked_nop_work_func(struct work_struct *work)
++{
++	int ret;
++	struct trusty_work *tw = container_of(work, struct trusty_work, work);
++	struct trusty_state *s = tw->ts;
++
++	ret = trusty_std_call32(s->dev, SMC_SC_LOCKED_NOP, 0, 0, 0);
++	if (ret != 0)
++		dev_err(s->dev, "%s: SMC_SC_LOCKED_NOP failed %d",
++			__func__, ret);
++
++	dev_dbg(s->dev, "%s: done\n", __func__);
++}
++
++static void nop_work_func(struct work_struct *work)
++{
++	int ret;
++	bool next;
++	u32 args[3];
++	u32 last_arg0;
++	struct trusty_work *tw = container_of(work, struct trusty_work, work);
++	struct trusty_state *s = tw->ts;
++
++	dequeue_nop(s, args);
++	do {
++		dev_dbg(s->dev, "%s: %x %x %x\n",
++			__func__, args[0], args[1], args[2]);
++
++		last_arg0 = args[0];
++		ret = trusty_std_call32(s->dev, SMC_SC_NOP,
++					args[0], args[1], args[2]);
++
++		next = dequeue_nop(s, args);
++
++		if (ret == SM_ERR_NOP_INTERRUPTED) {
++			next = true;
++		} else if (ret != SM_ERR_NOP_DONE) {
++			dev_err(s->dev, "%s: SMC_SC_NOP %x failed %d",
++				__func__, last_arg0, ret);
++			if (last_arg0) {
++				/*
++				 * Don't break out of the loop if a non-default
++				 * nop-handler returns an error.
++				 */
++				next = true;
++			}
++		}
++	} while (next);
++
++	dev_dbg(s->dev, "%s: done\n", __func__);
++}
++
++void trusty_enqueue_nop(struct device *dev, struct trusty_nop *nop)
++{
++	unsigned long flags;
++	struct trusty_work *tw;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	preempt_disable();
++	tw = this_cpu_ptr(s->nop_works);
++	if (nop) {
++		WARN_ON(s->api_version < TRUSTY_API_VERSION_SMP_NOP);
++
++		spin_lock_irqsave(&s->nop_lock, flags);
++		if (list_empty(&nop->node))
++			list_add_tail(&nop->node, &s->nop_queue);
++		spin_unlock_irqrestore(&s->nop_lock, flags);
++	}
++	queue_work(s->nop_wq, &tw->work);
++	preempt_enable();
++}
++EXPORT_SYMBOL(trusty_enqueue_nop);
++
++void trusty_dequeue_nop(struct device *dev, struct trusty_nop *nop)
++{
++	unsigned long flags;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(!nop))
++		return;
++
++	spin_lock_irqsave(&s->nop_lock, flags);
++	if (!list_empty(&nop->node))
++		list_del_init(&nop->node);
++	spin_unlock_irqrestore(&s->nop_lock, flags);
++}
++EXPORT_SYMBOL(trusty_dequeue_nop);
++
++static int trusty_probe(struct platform_device *pdev)
++{
++	int ret;
++	unsigned int cpu;
++	work_func_t work_func;
++	struct trusty_state *s;
++	struct device_node *node = pdev->dev.of_node;
++
++	if (!node) {
++		dev_err(&pdev->dev, "of_node required\n");
++		return -EINVAL;
++	}
++
++	s = kzalloc(sizeof(*s), GFP_KERNEL);
++	if (!s) {
++		ret = -ENOMEM;
++		goto err_allocate_state;
++	}
++
++	s->dev = &pdev->dev;
++	spin_lock_init(&s->nop_lock);
++	INIT_LIST_HEAD(&s->nop_queue);
++	mutex_init(&s->smc_lock);
++	mutex_init(&s->share_memory_msg_lock);
++	ATOMIC_INIT_NOTIFIER_HEAD(&s->notifier);
++	init_completion(&s->cpu_idle_completion);
++
++	s->dev->dma_parms = &s->dma_parms;
++	dma_set_max_seg_size(s->dev, 0xfffff000); /* dma_parms limit */
++	/*
++	 * Set dma mask to 48 bits. This is the current limit of
++	 * trusty_encode_page_info.
++	 */
++	dma_coerce_mask_and_coherent(s->dev, DMA_BIT_MASK(48));
++
++	platform_set_drvdata(pdev, s);
++
++	trusty_init_version(s, &pdev->dev);
++
++	ret = trusty_init_api_version(s, &pdev->dev);
++	if (ret < 0)
++		goto err_api_version;
++
++	ret = trusty_init_msg_buf(s, &pdev->dev);
++	if (ret < 0)
++		goto err_init_msg_buf;
++
++	s->nop_wq = alloc_workqueue("trusty-nop-wq", WQ_CPU_INTENSIVE, 0);
++	if (!s->nop_wq) {
++		ret = -ENODEV;
++		dev_err(&pdev->dev, "Failed create trusty-nop-wq\n");
++		goto err_create_nop_wq;
++	}
++
++	s->nop_works = alloc_percpu(struct trusty_work);
++	if (!s->nop_works) {
++		ret = -ENOMEM;
++		dev_err(&pdev->dev, "Failed to allocate works\n");
++		goto err_alloc_works;
++	}
++
++	if (s->api_version < TRUSTY_API_VERSION_SMP)
++		work_func = locked_nop_work_func;
++	else
++		work_func = nop_work_func;
++
++	for_each_possible_cpu(cpu) {
++		struct trusty_work *tw = per_cpu_ptr(s->nop_works, cpu);
++
++		tw->ts = s;
++		INIT_WORK(&tw->work, work_func);
++	}
++
++	ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
++	if (ret < 0) {
++		dev_err(&pdev->dev, "Failed to add children: %d\n", ret);
++		goto err_add_children;
++	}
++
++	return 0;
++
++err_add_children:
++	for_each_possible_cpu(cpu) {
++		struct trusty_work *tw = per_cpu_ptr(s->nop_works, cpu);
++
++		flush_work(&tw->work);
++	}
++	free_percpu(s->nop_works);
++err_alloc_works:
++	destroy_workqueue(s->nop_wq);
++err_create_nop_wq:
++	trusty_free_msg_buf(s, &pdev->dev);
++err_init_msg_buf:
++err_api_version:
++	s->dev->dma_parms = NULL;
++	kfree(s->version_str);
++	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
++	mutex_destroy(&s->share_memory_msg_lock);
++	mutex_destroy(&s->smc_lock);
++	kfree(s);
++err_allocate_state:
++	return ret;
++}
++
++static int trusty_remove(struct platform_device *pdev)
++{
++	unsigned int cpu;
++	struct trusty_state *s = platform_get_drvdata(pdev);
++
++	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
++
++	for_each_possible_cpu(cpu) {
++		struct trusty_work *tw = per_cpu_ptr(s->nop_works, cpu);
++
++		flush_work(&tw->work);
++	}
++	free_percpu(s->nop_works);
++	destroy_workqueue(s->nop_wq);
++
++	mutex_destroy(&s->share_memory_msg_lock);
++	mutex_destroy(&s->smc_lock);
++	trusty_free_msg_buf(s, &pdev->dev);
++	s->dev->dma_parms = NULL;
++	kfree(s->version_str);
++	kfree(s);
++	return 0;
++}
++
++static const struct of_device_id trusty_of_match[] = {
++	{ .compatible = "android,trusty-smc-v1", },
++	{},
++};
++
++MODULE_DEVICE_TABLE(trusty, trusty_of_match);
++
++static struct platform_driver trusty_driver = {
++	.probe = trusty_probe,
++	.remove = trusty_remove,
++	.driver	= {
++		.name = "trusty",
++		.of_match_table = trusty_of_match,
++		.dev_groups = trusty_groups,
++	},
++};
++
++static int __init trusty_driver_init(void)
++{
++	return platform_driver_register(&trusty_driver);
++}
++
++static void __exit trusty_driver_exit(void)
++{
++	platform_driver_unregister(&trusty_driver);
++}
++
++subsys_initcall(trusty_driver_init);
++module_exit(trusty_driver_exit);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Trusty core driver");
+diff --git a/include/linux/trusty/arm_ffa.h b/include/linux/trusty/arm_ffa.h
+new file mode 100644
+index 000000000000..ab7b2afb794c
+--- /dev/null
++++ b/include/linux/trusty/arm_ffa.h
+@@ -0,0 +1,590 @@
++/* SPDX-License-Identifier: MIT */
++/*
++ * Copyright (C) 2020 Google, Inc.
++ *
++ * Trusty and TF-A also have a copy of this header.
++ * Please keep the copies in sync.
++ */
++#ifndef __LINUX_TRUSTY_ARM_FFA_H
++#define __LINUX_TRUSTY_ARM_FFA_H
++
++/*
++ * Subset of Arm PSA Firmware Framework for Arm v8-A 1.0 EAC 1_0
++ * (https://developer.arm.com/docs/den0077/a) needed for shared memory.
++ */
++
++#include "smcall.h"
++
++#ifndef STATIC_ASSERT
++#define STATIC_ASSERT(e) _Static_assert(e, #e)
++#endif
++
++#define FFA_CURRENT_VERSION_MAJOR (1U)
++#define FFA_CURRENT_VERSION_MINOR (0U)
++
++#define FFA_VERSION_TO_MAJOR(version) ((version) >> 16)
++#define FFA_VERSION_TO_MINOR(version) ((version) & (0xffff))
++#define FFA_VERSION(major, minor) (((major) << 16) | (minor))
++#define FFA_CURRENT_VERSION \
++	FFA_VERSION(FFA_CURRENT_VERSION_MAJOR, FFA_CURRENT_VERSION_MINOR)
++
++#define SMC_ENTITY_SHARED_MEMORY 4
++
++#define SMC_FASTCALL_NR_SHARED_MEMORY(nr) \
++	SMC_FASTCALL_NR(SMC_ENTITY_SHARED_MEMORY, nr)
++#define SMC_FASTCALL64_NR_SHARED_MEMORY(nr) \
++	SMC_FASTCALL64_NR(SMC_ENTITY_SHARED_MEMORY, nr)
++
++/**
++ * typedef ffa_endpoint_id16_t - Endpoint ID
++ *
++ * Current implementation only supports VMIDs. FFA spec also support stream
++ * endpoint ids.
++ */
++typedef uint16_t ffa_endpoint_id16_t;
++
++/**
++ * struct ffa_cons_mrd - Constituent memory region descriptor
++ * @address:
++ *         Start address of contiguous memory region. Must be 4K page aligned.
++ * @page_count:
++ *         Number of 4K pages in region.
++ * @reserved_12_15:
++ *         Reserve bytes 12-15 to pad struct size to 16 bytes.
++ */
++struct ffa_cons_mrd {
++	uint64_t address;
++	uint32_t page_count;
++	uint32_t reserved_12_15;
++};
++STATIC_ASSERT(sizeof(struct ffa_cons_mrd) == 16);
++
++/**
++ * struct ffa_comp_mrd - Composite memory region descriptor
++ * @total_page_count:
++ *         Number of 4k pages in memory region. Must match sum of
++ *         @address_range_array[].page_count.
++ * @address_range_count:
++ *         Number of entries in @address_range_array.
++ * @reserved_8_15:
++ *         Reserve bytes 8-15 to pad struct size to 16 byte alignment and
++ *         make @address_range_array 16 byte aligned.
++ * @address_range_array:
++ *         Array of &struct ffa_cons_mrd entries.
++ */
++struct ffa_comp_mrd {
++	uint32_t total_page_count;
++	uint32_t address_range_count;
++	uint64_t reserved_8_15;
++	struct ffa_cons_mrd address_range_array[];
++};
++STATIC_ASSERT(sizeof(struct ffa_comp_mrd) == 16);
++
++/**
++ * typedef ffa_mem_attr8_t - Memory region attributes
++ *
++ * * @FFA_MEM_ATTR_DEVICE_NGNRNE:
++ *     Device-nGnRnE.
++ * * @FFA_MEM_ATTR_DEVICE_NGNRE:
++ *     Device-nGnRE.
++ * * @FFA_MEM_ATTR_DEVICE_NGRE:
++ *     Device-nGRE.
++ * * @FFA_MEM_ATTR_DEVICE_GRE:
++ *     Device-GRE.
++ * * @FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED
++ *     Normal memory. Non-cacheable.
++ * * @FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB
++ *     Normal memory. Write-back cached.
++ * * @FFA_MEM_ATTR_NON_SHAREABLE
++ *     Non-shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
++ * * @FFA_MEM_ATTR_OUTER_SHAREABLE
++ *     Outer Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
++ * * @FFA_MEM_ATTR_INNER_SHAREABLE
++ *     Inner Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
++ */
++typedef uint8_t ffa_mem_attr8_t;
++#define FFA_MEM_ATTR_DEVICE_NGNRNE ((1U << 4) | (0x0U << 2))
++#define FFA_MEM_ATTR_DEVICE_NGNRE ((1U << 4) | (0x1U << 2))
++#define FFA_MEM_ATTR_DEVICE_NGRE ((1U << 4) | (0x2U << 2))
++#define FFA_MEM_ATTR_DEVICE_GRE ((1U << 4) | (0x3U << 2))
++#define FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED ((2U << 4) | (0x1U << 2))
++#define FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB ((2U << 4) | (0x3U << 2))
++#define FFA_MEM_ATTR_NON_SHAREABLE (0x0U << 0)
++#define FFA_MEM_ATTR_OUTER_SHAREABLE (0x2U << 0)
++#define FFA_MEM_ATTR_INNER_SHAREABLE (0x3U << 0)
++
++/**
++ * typedef ffa_mem_perm8_t - Memory access permissions
++ *
++ * * @FFA_MEM_ATTR_RO
++ *     Request or specify read-only mapping.
++ * * @FFA_MEM_ATTR_RW
++ *     Request or allow read-write mapping.
++ * * @FFA_MEM_PERM_NX
++ *     Deny executable mapping.
++ * * @FFA_MEM_PERM_X
++ *     Request executable mapping.
++ */
++typedef uint8_t ffa_mem_perm8_t;
++#define FFA_MEM_PERM_RO (1U << 0)
++#define FFA_MEM_PERM_RW (1U << 1)
++#define FFA_MEM_PERM_NX (1U << 2)
++#define FFA_MEM_PERM_X (1U << 3)
++
++/**
++ * typedef ffa_mem_flag8_t - Endpoint memory flags
++ *
++ * * @FFA_MEM_FLAG_OTHER
++ *     Other borrower. Memory region must not be or was not retrieved on behalf
++ *     of this endpoint.
++ */
++typedef uint8_t ffa_mem_flag8_t;
++#define FFA_MEM_FLAG_OTHER (1U << 0)
++
++/**
++ * typedef ffa_mtd_flag32_t - Memory transaction descriptor flags
++ *
++ * * @FFA_MTD_FLAG_ZERO_MEMORY
++ *     Zero memory after unmapping from sender (must be 0 for share).
++ * * @FFA_MTD_FLAG_TIME_SLICING
++ *     Not supported by this implementation.
++ * * @FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH
++ *     Zero memory after unmapping from borrowers (must be 0 for share).
++ * * @FFA_MTD_FLAG_TYPE_MASK
++ *     Bit-mask to extract memory management transaction type from flags.
++ * * @FFA_MTD_FLAG_TYPE_SHARE_MEMORY
++ *     Share memory transaction flag.
++ *     Used by @SMC_FC_FFA_MEM_RETRIEVE_RESP to indicate that memory came from
++ *     @SMC_FC_FFA_MEM_SHARE and by @SMC_FC_FFA_MEM_RETRIEVE_REQ to specify that
++ *     it must have.
++ * * @FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK
++ *     Not supported by this implementation.
++ */
++typedef uint32_t ffa_mtd_flag32_t;
++#define FFA_MTD_FLAG_ZERO_MEMORY (1U << 0)
++#define FFA_MTD_FLAG_TIME_SLICING (1U << 1)
++#define FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH (1U << 2)
++#define FFA_MTD_FLAG_TYPE_MASK (3U << 3)
++#define FFA_MTD_FLAG_TYPE_SHARE_MEMORY (1U << 3)
++#define FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK (0x1FU << 5)
++
++/**
++ * struct ffa_mapd - Memory access permissions descriptor
++ * @endpoint_id:
++ *         Endpoint id that @memory_access_permissions and @flags apply to.
++ *         (&typedef ffa_endpoint_id16_t).
++ * @memory_access_permissions:
++ *         FFA_MEM_PERM_* values or'ed together (&typedef ffa_mem_perm8_t).
++ * @flags:
++ *         FFA_MEM_FLAG_* values or'ed together (&typedef ffa_mem_flag8_t).
++ */
++struct ffa_mapd {
++	ffa_endpoint_id16_t endpoint_id;
++	ffa_mem_perm8_t memory_access_permissions;
++	ffa_mem_flag8_t flags;
++};
++STATIC_ASSERT(sizeof(struct ffa_mapd) == 4);
++
++/**
++ * struct ffa_emad - Endpoint memory access descriptor.
++ * @mapd:  &struct ffa_mapd.
++ * @comp_mrd_offset:
++ *         Offset of &struct ffa_comp_mrd form start of &struct ffa_mtd.
++ * @reserved_8_15:
++ *         Reserved bytes 8-15. Must be 0.
++ */
++struct ffa_emad {
++	struct ffa_mapd mapd;
++	uint32_t comp_mrd_offset;
++	uint64_t reserved_8_15;
++};
++STATIC_ASSERT(sizeof(struct ffa_emad) == 16);
++
++/**
++ * struct ffa_mtd - Memory transaction descriptor.
++ * @sender_id:
++ *         Sender endpoint id.
++ * @memory_region_attributes:
++ *         FFA_MEM_ATTR_* values or'ed together (&typedef ffa_mem_attr8_t).
++ * @reserved_3:
++ *         Reserved bytes 3. Must be 0.
++ * @flags:
++ *         FFA_MTD_FLAG_* values or'ed together (&typedef ffa_mtd_flag32_t).
++ * @handle:
++ *         Id of shared memory object. Most be 0 for MEM_SHARE.
++ * @tag:   Client allocated tag. Must match original value.
++ * @reserved_24_27:
++ *         Reserved bytes 24-27. Must be 0.
++ * @emad_count:
++ *         Number of entries in @emad. Must be 1 in current implementation.
++ *         FFA spec allows more entries.
++ * @emad:
++ *         Endpoint memory access descriptor array (see @struct ffa_emad).
++ */
++struct ffa_mtd {
++	ffa_endpoint_id16_t sender_id;
++	ffa_mem_attr8_t memory_region_attributes;
++	uint8_t reserved_3;
++	ffa_mtd_flag32_t flags;
++	uint64_t handle;
++	uint64_t tag;
++	uint32_t reserved_24_27;
++	uint32_t emad_count;
++	struct ffa_emad emad[];
++};
++STATIC_ASSERT(sizeof(struct ffa_mtd) == 32);
++
++/**
++ * struct ffa_mem_relinquish_descriptor - Relinquish request descriptor.
++ * @handle:
++ *         Id of shared memory object to relinquish.
++ * @flags:
++ *         If bit 0 is set clear memory after unmapping from borrower. Must be 0
++ *         for share. Bit[1]: Time slicing. Not supported, must be 0. All other
++ *         bits are reserved 0.
++ * @endpoint_count:
++ *         Number of entries in @endpoint_array.
++ * @endpoint_array:
++ *         Array of endpoint ids.
++ */
++struct ffa_mem_relinquish_descriptor {
++	uint64_t handle;
++	uint32_t flags;
++	uint32_t endpoint_count;
++	ffa_endpoint_id16_t endpoint_array[];
++};
++STATIC_ASSERT(sizeof(struct ffa_mem_relinquish_descriptor) == 16);
++
++/**
++ * enum ffa_error - FF-A error code
++ * @FFA_ERROR_NOT_SUPPORTED:
++ *         Operation contained possibly valid parameters not supported by the
++ *         current implementation. Does not match FF-A 1.0 EAC 1_0 definition.
++ * @FFA_ERROR_INVALID_PARAMETERS:
++ *         Invalid parameters. Conditions function specific.
++ * @FFA_ERROR_NO_MEMORY:
++ *         Not enough memory.
++ * @FFA_ERROR_DENIED:
++ *         Operation not allowed. Conditions function specific.
++ *
++ * FF-A 1.0 EAC 1_0 defines other error codes as well but the current
++ * implementation does not use them.
++ */
++enum ffa_error {
++	FFA_ERROR_NOT_SUPPORTED = -1,
++	FFA_ERROR_INVALID_PARAMETERS = -2,
++	FFA_ERROR_NO_MEMORY = -3,
++	FFA_ERROR_DENIED = -6,
++};
++
++/**
++ * SMC_FC32_FFA_MIN - First 32 bit SMC opcode reserved for FFA
++ */
++#define SMC_FC32_FFA_MIN SMC_FASTCALL_NR_SHARED_MEMORY(0x60)
++
++/**
++ * SMC_FC32_FFA_MAX - Last 32 bit SMC opcode reserved for FFA
++ */
++#define SMC_FC32_FFA_MAX SMC_FASTCALL_NR_SHARED_MEMORY(0x7F)
++
++/**
++ * SMC_FC64_FFA_MIN - First 64 bit SMC opcode reserved for FFA
++ */
++#define SMC_FC64_FFA_MIN SMC_FASTCALL64_NR_SHARED_MEMORY(0x60)
++
++/**
++ * SMC_FC64_FFA_MAX - Last 64 bit SMC opcode reserved for FFA
++ */
++#define SMC_FC64_FFA_MAX SMC_FASTCALL64_NR_SHARED_MEMORY(0x7F)
++
++/**
++ * SMC_FC_FFA_ERROR - SMC error return opcode
++ *
++ * Register arguments:
++ *
++ * * w1:     VMID in [31:16], vCPU in [15:0]
++ * * w2:     Error code (&enum ffa_error)
++ */
++#define SMC_FC_FFA_ERROR SMC_FASTCALL_NR_SHARED_MEMORY(0x60)
++
++/**
++ * SMC_FC_FFA_SUCCESS - 32 bit SMC success return opcode
++ *
++ * Register arguments:
++ *
++ * * w1:     VMID in [31:16], vCPU in [15:0]
++ * * w2-w7:  Function specific
++ */
++#define SMC_FC_FFA_SUCCESS SMC_FASTCALL_NR_SHARED_MEMORY(0x61)
++
++/**
++ * SMC_FC64_FFA_SUCCESS - 64 bit SMC success return opcode
++ *
++ * Register arguments:
++ *
++ * * w1:             VMID in [31:16], vCPU in [15:0]
++ * * w2/x2-w7/x7:    Function specific
++ */
++#define SMC_FC64_FFA_SUCCESS SMC_FASTCALL64_NR_SHARED_MEMORY(0x61)
++
++/**
++ * SMC_FC_FFA_VERSION - SMC opcode to return supported FF-A version
++ *
++ * Register arguments:
++ *
++ * * w1:     Major version bit[30:16] and minor version in bit[15:0] supported
++ *           by caller. Bit[31] must be 0.
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ * * w2:     Major version bit[30:16], minor version in bit[15:0], bit[31] must
++ *           be 0.
++ *
++ * or
++ *
++ * * w0:     SMC_FC_FFA_ERROR
++ * * w2:     FFA_ERROR_NOT_SUPPORTED if major version passed in is less than the
++ *           minimum major version supported.
++ */
++#define SMC_FC_FFA_VERSION SMC_FASTCALL_NR_SHARED_MEMORY(0x63)
++
++/**
++ * SMC_FC_FFA_FEATURES - SMC opcode to check optional feature support
++ *
++ * Register arguments:
++ *
++ * * w1:     FF-A function ID
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ * * w2:     Bit[0]: Supports custom buffers for memory transactions.
++ *           Bit[1:0]: For RXTX_MAP min buffer size and alignment boundary.
++ *           Other bits must be 0.
++ * * w3:     For FFA_MEM_RETRIEVE_REQ, bit[7-0]: Number of times receiver can
++ *           retrieve each memory region before relinquishing it specified as
++ *           ((1U << (value + 1)) - 1 (or value = bits in reference count - 1).
++ *           For all other bits and commands: must be 0.
++ * or
++ *
++ * * w0:     SMC_FC_FFA_ERROR
++ * * w2:     FFA_ERROR_NOT_SUPPORTED if function is not implemented, or
++ *           FFA_ERROR_INVALID_PARAMETERS if function id is not valid.
++ */
++#define SMC_FC_FFA_FEATURES SMC_FASTCALL_NR_SHARED_MEMORY(0x64)
++
++/**
++ * SMC_FC_FFA_RXTX_MAP - 32 bit SMC opcode to map message buffers
++ *
++ * Register arguments:
++ *
++ * * w1:     TX address
++ * * w2:     RX address
++ * * w3:     RX/TX page count in bit[5:0]
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ */
++#define SMC_FC_FFA_RXTX_MAP SMC_FASTCALL_NR_SHARED_MEMORY(0x66)
++
++/**
++ * SMC_FC64_FFA_RXTX_MAP - 64 bit SMC opcode to map message buffers
++ *
++ * Register arguments:
++ *
++ * * x1:     TX address
++ * * x2:     RX address
++ * * x3:     RX/TX page count in bit[5:0]
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ */
++#define SMC_FC64_FFA_RXTX_MAP SMC_FASTCALL64_NR_SHARED_MEMORY(0x66)
++#ifdef CONFIG_64BIT
++#define SMC_FCZ_FFA_RXTX_MAP SMC_FC64_FFA_RXTX_MAP
++#else
++#define SMC_FCZ_FFA_RXTX_MAP SMC_FC_FFA_RXTX_MAP
++#endif
++
++/**
++ * SMC_FC_FFA_RXTX_UNMAP - SMC opcode to unmap message buffers
++ *
++ * Register arguments:
++ *
++ * * w1:     ID in [31:16]
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ */
++#define SMC_FC_FFA_RXTX_UNMAP SMC_FASTCALL_NR_SHARED_MEMORY(0x67)
++
++/**
++ * SMC_FC_FFA_ID_GET - SMC opcode to get endpoint id of caller
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ * * w2:     ID in bit[15:0], bit[31:16] must be 0.
++ */
++#define SMC_FC_FFA_ID_GET SMC_FASTCALL_NR_SHARED_MEMORY(0x69)
++
++/**
++ * SMC_FC_FFA_MEM_DONATE - 32 bit SMC opcode to donate memory
++ *
++ * Not supported.
++ */
++#define SMC_FC_FFA_MEM_DONATE SMC_FASTCALL_NR_SHARED_MEMORY(0x71)
++
++/**
++ * SMC_FC_FFA_MEM_LEND - 32 bit SMC opcode to lend memory
++ *
++ * Not currently supported.
++ */
++#define SMC_FC_FFA_MEM_LEND SMC_FASTCALL_NR_SHARED_MEMORY(0x72)
++
++/**
++ * SMC_FC_FFA_MEM_SHARE - 32 bit SMC opcode to share memory
++ *
++ * Register arguments:
++ *
++ * * w1:     Total length
++ * * w2:     Fragment length
++ * * w3:     Address
++ * * w4:     Page count
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ * * w2/w3:  Handle
++ *
++ * or
++ *
++ * * w0:     &SMC_FC_FFA_MEM_FRAG_RX
++ * * w1-:    See &SMC_FC_FFA_MEM_FRAG_RX
++ *
++ * or
++ *
++ * * w0:     SMC_FC_FFA_ERROR
++ * * w2:     Error code (&enum ffa_error)
++ */
++#define SMC_FC_FFA_MEM_SHARE SMC_FASTCALL_NR_SHARED_MEMORY(0x73)
++
++/**
++ * SMC_FC64_FFA_MEM_SHARE - 64 bit SMC opcode to share memory
++ *
++ * Register arguments:
++ *
++ * * w1:     Total length
++ * * w2:     Fragment length
++ * * x3:     Address
++ * * w4:     Page count
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ * * w2/w3:  Handle
++ *
++ * or
++ *
++ * * w0:     &SMC_FC_FFA_MEM_FRAG_RX
++ * * w1-:    See &SMC_FC_FFA_MEM_FRAG_RX
++ *
++ * or
++ *
++ * * w0:     SMC_FC_FFA_ERROR
++ * * w2:     Error code (&enum ffa_error)
++ */
++#define SMC_FC64_FFA_MEM_SHARE SMC_FASTCALL64_NR_SHARED_MEMORY(0x73)
++
++/**
++ * SMC_FC_FFA_MEM_RETRIEVE_REQ - 32 bit SMC opcode to retrieve shared memory
++ *
++ * Register arguments:
++ *
++ * * w1:     Total length
++ * * w2:     Fragment length
++ * * w3:     Address
++ * * w4:     Page count
++ *
++ * Return:
++ * * w0:             &SMC_FC_FFA_MEM_RETRIEVE_RESP
++ * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_RETRIEVE_RESP
++ */
++#define SMC_FC_FFA_MEM_RETRIEVE_REQ SMC_FASTCALL_NR_SHARED_MEMORY(0x74)
++
++/**
++ * SMC_FC64_FFA_MEM_RETRIEVE_REQ - 64 bit SMC opcode to retrieve shared memory
++ *
++ * Register arguments:
++ *
++ * * w1:     Total length
++ * * w2:     Fragment length
++ * * x3:     Address
++ * * w4:     Page count
++ *
++ * Return:
++ * * w0:             &SMC_FC_FFA_MEM_RETRIEVE_RESP
++ * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_RETRIEVE_RESP
++ */
++#define SMC_FC64_FFA_MEM_RETRIEVE_REQ SMC_FASTCALL64_NR_SHARED_MEMORY(0x74)
++
++/**
++ * SMC_FC_FFA_MEM_RETRIEVE_RESP - Retrieve 32 bit SMC return opcode
++ *
++ * Register arguments:
++ *
++ * * w1:     Total length
++ * * w2:     Fragment length
++ */
++#define SMC_FC_FFA_MEM_RETRIEVE_RESP SMC_FASTCALL_NR_SHARED_MEMORY(0x75)
++
++/**
++ * SMC_FC_FFA_MEM_RELINQUISH - SMC opcode to relinquish shared memory
++ *
++ * Input in &struct ffa_mem_relinquish_descriptor format in message buffer.
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ */
++#define SMC_FC_FFA_MEM_RELINQUISH SMC_FASTCALL_NR_SHARED_MEMORY(0x76)
++
++/**
++ * SMC_FC_FFA_MEM_RECLAIM - SMC opcode to reclaim shared memory
++ *
++ * Register arguments:
++ *
++ * * w1/w2:  Handle
++ * * w3:     Flags
++ *
++ * Return:
++ * * w0:     &SMC_FC_FFA_SUCCESS
++ */
++#define SMC_FC_FFA_MEM_RECLAIM SMC_FASTCALL_NR_SHARED_MEMORY(0x77)
++
++/**
++ * SMC_FC_FFA_MEM_FRAG_RX - SMC opcode to request next fragment.
++ *
++ * Register arguments:
++ *
++ * * w1/w2:  Cookie
++ * * w3:     Fragment offset.
++ * * w4:     Endpoint id ID in [31:16], if client is hypervisor.
++ *
++ * Return:
++ * * w0:             &SMC_FC_FFA_MEM_FRAG_TX
++ * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_FRAG_TX
++ */
++#define SMC_FC_FFA_MEM_FRAG_RX SMC_FASTCALL_NR_SHARED_MEMORY(0x7A)
++
++/**
++ * SMC_FC_FFA_MEM_FRAG_TX - SMC opcode to transmit next fragment
++ *
++ * Register arguments:
++ *
++ * * w1/w2:  Cookie
++ * * w3:     Fragment length.
++ * * w4:     Sender endpoint id ID in [31:16], if client is hypervisor.
++ *
++ * Return:
++ * * w0:             &SMC_FC_FFA_MEM_FRAG_RX or &SMC_FC_FFA_SUCCESS.
++ * * w1/x1-w5/x5:    See opcode in w0.
++ */
++#define SMC_FC_FFA_MEM_FRAG_TX SMC_FASTCALL_NR_SHARED_MEMORY(0x7B)
++
++#endif /* __LINUX_TRUSTY_ARM_FFA_H */
+diff --git a/include/linux/trusty/sm_err.h b/include/linux/trusty/sm_err.h
+new file mode 100644
+index 000000000000..f6504448c6c3
+--- /dev/null
++++ b/include/linux/trusty/sm_err.h
+@@ -0,0 +1,28 @@
++/* SPDX-License-Identifier: MIT */
++/*
++ * Copyright (c) 2013 Google Inc. All rights reserved
++ *
++ * Trusty and TF-A also have a copy of this header.
++ * Please keep the copies in sync.
++ */
++#ifndef __LINUX_TRUSTY_SM_ERR_H
++#define __LINUX_TRUSTY_SM_ERR_H
++
++/* Errors from the secure monitor */
++#define SM_ERR_UNDEFINED_SMC		0xFFFFFFFF /* Unknown SMC (defined by ARM DEN 0028A(0.9.0) */
++#define SM_ERR_INVALID_PARAMETERS	-2
++#define SM_ERR_INTERRUPTED		-3	/* Got interrupted. Call back with restart SMC */
++#define SM_ERR_UNEXPECTED_RESTART	-4	/* Got an restart SMC when we didn't expect it */
++#define SM_ERR_BUSY			-5	/* Temporarily busy. Call back with original args */
++#define SM_ERR_INTERLEAVED_SMC		-6	/* Got a trusted_service SMC when a restart SMC is required */
++#define SM_ERR_INTERNAL_FAILURE		-7	/* Unknown error */
++#define SM_ERR_NOT_SUPPORTED		-8
++#define SM_ERR_NOT_ALLOWED		-9	/* SMC call not allowed */
++#define SM_ERR_END_OF_INPUT		-10
++#define SM_ERR_PANIC			-11	/* Secure OS crashed */
++#define SM_ERR_FIQ_INTERRUPTED		-12	/* Got interrupted by FIQ. Call back with SMC_SC_RESTART_FIQ on same CPU */
++#define SM_ERR_CPU_IDLE			-13	/* SMC call waiting for another CPU */
++#define SM_ERR_NOP_INTERRUPTED		-14	/* Got interrupted. Call back with new SMC_SC_NOP */
++#define SM_ERR_NOP_DONE			-15	/* Cpu idle after SMC_SC_NOP (not an error) */
++
++#endif
+diff --git a/include/linux/trusty/smcall.h b/include/linux/trusty/smcall.h
+new file mode 100644
+index 000000000000..aea3f6068593
+--- /dev/null
++++ b/include/linux/trusty/smcall.h
+@@ -0,0 +1,124 @@
++/* SPDX-License-Identifier: MIT */
++/*
++ * Copyright (c) 2013-2014 Google Inc. All rights reserved
++ *
++ * Trusty and TF-A also have a copy of this header.
++ * Please keep the copies in sync.
++ */
++#ifndef __LINUX_TRUSTY_SMCALL_H
++#define __LINUX_TRUSTY_SMCALL_H
++
++#define SMC_NUM_ENTITIES	64
++#define SMC_NUM_ARGS		4
++#define SMC_NUM_PARAMS		(SMC_NUM_ARGS - 1)
++
++#define SMC_IS_FASTCALL(smc_nr)	((smc_nr) & 0x80000000)
++#define SMC_IS_SMC64(smc_nr)	((smc_nr) & 0x40000000)
++#define SMC_ENTITY(smc_nr)	(((smc_nr) & 0x3F000000) >> 24)
++#define SMC_FUNCTION(smc_nr)	((smc_nr) & 0x0000FFFF)
++
++#define SMC_NR(entity, fn, fastcall, smc64) ((((fastcall) & 0x1U) << 31) | \
++					     (((smc64) & 0x1U) << 30) | \
++					     (((entity) & 0x3FU) << 24) | \
++					     ((fn) & 0xFFFFU) \
++					    )
++
++#define SMC_FASTCALL_NR(entity, fn)	SMC_NR((entity), (fn), 1, 0)
++#define SMC_STDCALL_NR(entity, fn)	SMC_NR((entity), (fn), 0, 0)
++#define SMC_FASTCALL64_NR(entity, fn)	SMC_NR((entity), (fn), 1, 1)
++#define SMC_STDCALL64_NR(entity, fn)	SMC_NR((entity), (fn), 0, 1)
++
++#define	SMC_ENTITY_ARCH			0	/* ARM Architecture calls */
++#define	SMC_ENTITY_CPU			1	/* CPU Service calls */
++#define	SMC_ENTITY_SIP			2	/* SIP Service calls */
++#define	SMC_ENTITY_OEM			3	/* OEM Service calls */
++#define	SMC_ENTITY_STD			4	/* Standard Service calls */
++#define	SMC_ENTITY_RESERVED		5	/* Reserved for future use */
++#define	SMC_ENTITY_TRUSTED_APP		48	/* Trusted Application calls */
++#define	SMC_ENTITY_TRUSTED_OS		50	/* Trusted OS calls */
++#define	SMC_ENTITY_LOGGING		51	/* Used for secure -> nonsecure logging */
++#define	SMC_ENTITY_TEST			52	/* Used for secure -> nonsecure tests */
++#define	SMC_ENTITY_SECURE_MONITOR	60	/* Trusted OS calls internal to secure monitor */
++
++/* FC = Fast call, SC = Standard call */
++#define SMC_SC_RESTART_LAST	SMC_STDCALL_NR(SMC_ENTITY_SECURE_MONITOR, 0)
++#define SMC_SC_LOCKED_NOP	SMC_STDCALL_NR(SMC_ENTITY_SECURE_MONITOR, 1)
++
++/**
++ * SMC_SC_RESTART_FIQ - Re-enter trusty after it was interrupted by an fiq
++ *
++ * No arguments, no return value.
++ *
++ * Re-enter trusty after returning to ns to process an fiq. Must be called iff
++ * trusty returns SM_ERR_FIQ_INTERRUPTED.
++ *
++ * Enable by selecting api version TRUSTY_API_VERSION_RESTART_FIQ (1) or later.
++ */
++#define SMC_SC_RESTART_FIQ	SMC_STDCALL_NR(SMC_ENTITY_SECURE_MONITOR, 2)
++
++/**
++ * SMC_SC_NOP - Enter trusty to run pending work.
++ *
++ * No arguments.
++ *
++ * Returns SM_ERR_NOP_INTERRUPTED or SM_ERR_NOP_DONE.
++ * If SM_ERR_NOP_INTERRUPTED is returned, the call must be repeated.
++ *
++ * Enable by selecting api version TRUSTY_API_VERSION_SMP (2) or later.
++ */
++#define SMC_SC_NOP		SMC_STDCALL_NR(SMC_ENTITY_SECURE_MONITOR, 3)
++
++/*
++ * Return from secure os to non-secure os with return value in r1
++ */
++#define SMC_SC_NS_RETURN	SMC_STDCALL_NR(SMC_ENTITY_SECURE_MONITOR, 0)
++
++#define SMC_FC_RESERVED		SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 0)
++#define SMC_FC_FIQ_EXIT		SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 1)
++#define SMC_FC_REQUEST_FIQ	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 2)
++
++#define TRUSTY_IRQ_TYPE_NORMAL		(0)
++#define TRUSTY_IRQ_TYPE_PER_CPU		(1)
++#define TRUSTY_IRQ_TYPE_DOORBELL	(2)
++#define SMC_FC_GET_NEXT_IRQ	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 3)
++
++#define SMC_FC_CPU_SUSPEND	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 7)
++#define SMC_FC_CPU_RESUME	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 8)
++
++#define SMC_FC_AARCH_SWITCH	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 9)
++#define SMC_FC_GET_VERSION_STR	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 10)
++
++/**
++ * SMC_FC_API_VERSION - Find and select supported API version.
++ *
++ * @r1: Version supported by client.
++ *
++ * Returns version supported by trusty.
++ *
++ * If multiple versions are supported, the client should start by calling
++ * SMC_FC_API_VERSION with the largest version it supports. Trusty will then
++ * return a version it supports. If the client does not support the version
++ * returned by trusty and the version returned is less than the version
++ * requested, repeat the call with the largest supported version less than the
++ * last returned version.
++ *
++ * This call must be made before any calls that are affected by the api version.
++ */
++#define TRUSTY_API_VERSION_RESTART_FIQ	(1)
++#define TRUSTY_API_VERSION_SMP		(2)
++#define TRUSTY_API_VERSION_SMP_NOP	(3)
++#define TRUSTY_API_VERSION_PHYS_MEM_OBJ	(4)
++#define TRUSTY_API_VERSION_MEM_OBJ	(5)
++#define TRUSTY_API_VERSION_CURRENT	(5)
++#define SMC_FC_API_VERSION	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 11)
++
++/* TRUSTED_OS entity calls */
++#define SMC_SC_VIRTIO_GET_DESCR	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 20)
++#define SMC_SC_VIRTIO_START	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 21)
++#define SMC_SC_VIRTIO_STOP	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 22)
++
++#define SMC_SC_VDEV_RESET	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 23)
++#define SMC_SC_VDEV_KICK_VQ	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 24)
++#define SMC_NC_VDEV_KICK_VQ	SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 25)
++
++#endif /* __LINUX_TRUSTY_SMCALL_H */
+diff --git a/include/linux/trusty/trusty.h b/include/linux/trusty/trusty.h
+new file mode 100644
+index 000000000000..efbb36999a8b
+--- /dev/null
++++ b/include/linux/trusty/trusty.h
+@@ -0,0 +1,131 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2013 Google, Inc.
++ */
++#ifndef __LINUX_TRUSTY_TRUSTY_H
++#define __LINUX_TRUSTY_TRUSTY_H
++
++#include <linux/kernel.h>
++#include <linux/trusty/sm_err.h>
++#include <linux/types.h>
++#include <linux/device.h>
++#include <linux/pagemap.h>
++
++
++#if IS_ENABLED(CONFIG_TRUSTY)
++s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2);
++s32 trusty_fast_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2);
++#ifdef CONFIG_64BIT
++s64 trusty_fast_call64(struct device *dev, u64 smcnr, u64 a0, u64 a1, u64 a2);
++#endif
++#else
++static inline s32 trusty_std_call32(struct device *dev, u32 smcnr,
++				    u32 a0, u32 a1, u32 a2)
++{
++	return SM_ERR_UNDEFINED_SMC;
++}
++static inline s32 trusty_fast_call32(struct device *dev, u32 smcnr,
++				     u32 a0, u32 a1, u32 a2)
++{
++	return SM_ERR_UNDEFINED_SMC;
++}
++#ifdef CONFIG_64BIT
++static inline s64 trusty_fast_call64(struct device *dev,
++				     u64 smcnr, u64 a0, u64 a1, u64 a2)
++{
++	return SM_ERR_UNDEFINED_SMC;
++}
++#endif
++#endif
++
++struct notifier_block;
++enum {
++	TRUSTY_CALL_PREPARE,
++	TRUSTY_CALL_RETURNED,
++};
++int trusty_call_notifier_register(struct device *dev,
++				  struct notifier_block *n);
++int trusty_call_notifier_unregister(struct device *dev,
++				    struct notifier_block *n);
++const char *trusty_version_str_get(struct device *dev);
++u32 trusty_get_api_version(struct device *dev);
++bool trusty_get_panic_status(struct device *dev);
++
++struct ns_mem_page_info {
++	u64 paddr;
++	u8 ffa_mem_attr;
++	u8 ffa_mem_perm;
++	u64 compat_attr;
++};
++
++int trusty_encode_page_info(struct ns_mem_page_info *inf,
++			    struct page *page, pgprot_t pgprot);
++
++struct scatterlist;
++typedef u64 trusty_shared_mem_id_t;
++int trusty_share_memory(struct device *dev, trusty_shared_mem_id_t *id,
++			struct scatterlist *sglist, unsigned int nents,
++			pgprot_t pgprot);
++int trusty_share_memory_compat(struct device *dev, trusty_shared_mem_id_t *id,
++			       struct scatterlist *sglist, unsigned int nents,
++			       pgprot_t pgprot);
++int trusty_transfer_memory(struct device *dev, u64 *id,
++			   struct scatterlist *sglist, unsigned int nents,
++			   pgprot_t pgprot, u64 tag, bool lend);
++int trusty_reclaim_memory(struct device *dev, trusty_shared_mem_id_t id,
++			  struct scatterlist *sglist, unsigned int nents);
++
++struct dma_buf;
++#ifdef CONFIG_TRUSTY_DMA_BUF_FFA_TAG
++u64 trusty_dma_buf_get_ffa_tag(struct dma_buf *dma_buf);
++#else
++static inline u64 trusty_dma_buf_get_ffa_tag(struct dma_buf *dma_buf)
++{
++	return 0;
++}
++#endif
++
++/* Invalid handle value is defined by FF-A spec */
++#ifdef CONFIG_TRUSTY_DMA_BUF_SHARED_MEM_ID
++/**
++ * trusty_dma_buf_get_shared_mem_id() - Get memory ID corresponding to a dma_buf
++ * @dma_buf: DMA buffer
++ * @id:      Pointer to output trusty_shared_mem_id_t
++ *
++ * Sets @id to trusty_shared_mem_id_t corresponding to the given @dma_buf.
++ * @dma_buf "owns" the ID, i.e. is responsible for allocating/releasing it.
++ * @dma_buf with an allocated @id must be in secure memory and should only be
++ * sent to Trusty using TRUSTY_SEND_SECURE.
++ *
++ * Return:
++ * * 0        - success
++ * * -ENODATA - @dma_buf does not own a trusty_shared_mem_id_t
++ * * ...      - @dma_buf should not be lent or shared
++ */
++int trusty_dma_buf_get_shared_mem_id(struct dma_buf *dma_buf,
++				     trusty_shared_mem_id_t *id);
++#else
++static inline int trusty_dma_buf_get_shared_mem_id(struct dma_buf *dma_buf,
++						   trusty_shared_mem_id_t *id)
++{
++	return -ENODATA;
++}
++#endif
++
++struct trusty_nop {
++	struct list_head node;
++	u32 args[3];
++};
++
++static inline void trusty_nop_init(struct trusty_nop *nop,
++				   u32 arg0, u32 arg1, u32 arg2) {
++	INIT_LIST_HEAD(&nop->node);
++	nop->args[0] = arg0;
++	nop->args[1] = arg1;
++	nop->args[2] = arg2;
++}
++
++void trusty_enqueue_nop(struct device *dev, struct trusty_nop *nop);
++void trusty_dequeue_nop(struct device *dev, struct trusty_nop *nop);
++
++#endif
+diff --git a/include/linux/trusty/trusty_ipc.h b/include/linux/trusty/trusty_ipc.h
+new file mode 100644
+index 000000000000..9386392f3a64
+--- /dev/null
++++ b/include/linux/trusty/trusty_ipc.h
+@@ -0,0 +1,89 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2015 Google, Inc.
++ */
++#ifndef __LINUX_TRUSTY_TRUSTY_IPC_H
++#define __LINUX_TRUSTY_TRUSTY_IPC_H
++
++#include <linux/list.h>
++#include <linux/scatterlist.h>
++#include <linux/trusty/trusty.h>
++#include <linux/types.h>
++
++struct tipc_chan;
++
++struct tipc_msg_buf {
++	void *buf_va;
++	struct scatterlist sg;
++	trusty_shared_mem_id_t buf_id;
++	size_t buf_sz;
++	size_t wpos;
++	size_t rpos;
++	size_t shm_cnt;
++	struct list_head node;
++};
++
++enum tipc_chan_event {
++	TIPC_CHANNEL_CONNECTED = 1,
++	TIPC_CHANNEL_DISCONNECTED,
++	TIPC_CHANNEL_SHUTDOWN,
++};
++
++struct tipc_chan_ops {
++	void (*handle_event)(void *cb_arg, int event);
++	struct tipc_msg_buf *(*handle_msg)(void *cb_arg,
++					   struct tipc_msg_buf *mb);
++	void (*handle_release)(void *cb_arg);
++};
++
++struct tipc_chan *tipc_create_channel(struct device *dev,
++				      const struct tipc_chan_ops *ops,
++				      void *cb_arg);
++
++int tipc_chan_connect(struct tipc_chan *chan, const char *port);
++
++int tipc_chan_queue_msg(struct tipc_chan *chan, struct tipc_msg_buf *mb);
++
++int tipc_chan_shutdown(struct tipc_chan *chan);
++
++void tipc_chan_destroy(struct tipc_chan *chan);
++
++struct tipc_msg_buf *tipc_chan_get_rxbuf(struct tipc_chan *chan);
++
++void tipc_chan_put_rxbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb);
++
++struct tipc_msg_buf *
++tipc_chan_get_txbuf_timeout(struct tipc_chan *chan, long timeout);
++
++void tipc_chan_put_txbuf(struct tipc_chan *chan, struct tipc_msg_buf *mb);
++
++static inline size_t mb_avail_space(struct tipc_msg_buf *mb)
++{
++	return mb->buf_sz - mb->wpos;
++}
++
++static inline size_t mb_avail_data(struct tipc_msg_buf *mb)
++{
++	return mb->wpos - mb->rpos;
++}
++
++static inline void *mb_put_data(struct tipc_msg_buf *mb, size_t len)
++{
++	void *pos = (u8 *)mb->buf_va + mb->wpos;
++
++	BUG_ON(mb->wpos + len > mb->buf_sz);
++	mb->wpos += len;
++	return pos;
++}
++
++static inline void *mb_get_data(struct tipc_msg_buf *mb, size_t len)
++{
++	void *pos = (u8 *)mb->buf_va + mb->rpos;
++
++	BUG_ON(mb->rpos + len > mb->wpos);
++	mb->rpos += len;
++	return pos;
++}
++
++#endif /* __LINUX_TRUSTY_TRUSTY_IPC_H */
++
+diff --git a/include/uapi/linux/trusty/ipc.h b/include/uapi/linux/trusty/ipc.h
+new file mode 100644
+index 000000000000..af91035484f1
+--- /dev/null
++++ b/include/uapi/linux/trusty/ipc.h
+@@ -0,0 +1,65 @@
++/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
++
++#ifndef _UAPI_LINUX_TRUSTY_IPC_H_
++#define _UAPI_LINUX_TRUSTY_IPC_H_
++
++#include <linux/ioctl.h>
++#include <linux/types.h>
++#include <linux/uio.h>
++
++/**
++ * enum transfer_kind - How to send an fd to Trusty
++ * @TRUSTY_SHARE:       Memory will be accessible by Linux and Trusty. On ARM it
++ *                      will be mapped as nonsecure. Suitable for shared memory.
++ *                      The paired fd must be a "dma_buf".
++ * @TRUSTY_LEND:        Memory will be accessible only to Trusty. On ARM it will
++ *                      be transitioned to "Secure" memory if Trusty is in
++ *                      TrustZone. This transfer kind is suitable for donating
++ *                      video buffers or other similar resources. The paired fd
++ *                      may need to come from a platform-specific allocator for
++ *                      memory that may be transitioned to "Secure".
++ * @TRUSTY_SEND_SECURE: Send memory that is already "Secure". Memory will be
++ *                      accessible only to Trusty. The paired fd may need to
++ *                      come from a platform-specific allocator that returns
++ *                      "Secure" buffers.
++ *
++ * Describes how the user would like the resource in question to be sent to
++ * Trusty. Options may be valid only for certain kinds of fds.
++ */
++enum transfer_kind {
++	TRUSTY_SHARE = 0,
++	TRUSTY_LEND = 1,
++	TRUSTY_SEND_SECURE = 2,
++};
++
++/**
++ * struct trusty_shm - Describes a transfer of memory to Trusty
++ * @fd:       The fd to transfer
++ * @transfer: How to transfer it - see &enum transfer_kind
++ */
++struct trusty_shm {
++	__s32 fd;
++	__u32 transfer;
++};
++
++/**
++ * struct tipc_send_msg_req - Request struct for @TIPC_IOC_SEND_MSG
++ * @iov:     Pointer to an array of &struct iovec describing data to be sent
++ * @shm:     Pointer to an array of &struct trusty_shm describing any file
++ *           descriptors to be transferred.
++ * @iov_cnt: Number of elements in the @iov array
++ * @shm_cnt: Number of elements in the @shm array
++ */
++struct tipc_send_msg_req {
++	__u64 iov;
++	__u64 shm;
++	__u64 iov_cnt;
++	__u64 shm_cnt;
++};
++
++#define TIPC_IOC_MAGIC			'r'
++#define TIPC_IOC_CONNECT		_IOW(TIPC_IOC_MAGIC, 0x80, char *)
++#define TIPC_IOC_SEND_MSG		_IOW(TIPC_IOC_MAGIC, 0x81, \
++					     struct tipc_send_msg_req)
++
++#endif
+diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h
+index b052355ac7a3..cf6b95d9a1ec 100644
+--- a/include/uapi/linux/virtio_ids.h
++++ b/include/uapi/linux/virtio_ids.h
+@@ -39,6 +39,7 @@
+ #define VIRTIO_ID_9P		9 /* 9p virtio console */
+ #define VIRTIO_ID_RPROC_SERIAL 11 /* virtio remoteproc serial link */
+ #define VIRTIO_ID_CAIF	       12 /* Virtio caif */
++#define VIRTIO_ID_TRUSTY_IPC   13 /* virtio trusty ipc */
+ #define VIRTIO_ID_GPU          16 /* virtio GPU */
+ #define VIRTIO_ID_INPUT        18 /* virtio input */
+ #define VIRTIO_ID_VSOCK        19 /* virtio vsock transport */
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0036-ANDROID-trusty-Remove-FFA-specific-initilization.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0036-ANDROID-trusty-Remove-FFA-specific-initilization.patch
new file mode 100644
index 0000000..6dd8af26
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0036-ANDROID-trusty-Remove-FFA-specific-initilization.patch
@@ -0,0 +1,1076 @@
+From 8318af58a0f5d29352d3c84be6b20fe6d1ca352f Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 13:41:26 +0000
+Subject: [PATCH 23/32] ANDROID: trusty: Remove FFA specific initilization
+
+Remove FFA specific initialization and its arm_ffa.h file from Trusty
+driver. These changes are done so that Trusty can use ARM FFA driver
+and its related header files.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Iaad473659de94930cdf78cd7201f016d59cee8d7
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/trusty-mem.c    |  37 ---
+ drivers/trusty/trusty.c        | 286 +---------------
+ include/linux/trusty/arm_ffa.h | 590 ---------------------------------
+ include/linux/trusty/trusty.h  |   3 -
+ 4 files changed, 3 insertions(+), 913 deletions(-)
+ delete mode 100644 include/linux/trusty/arm_ffa.h
+
+diff --git a/drivers/trusty/trusty-mem.c b/drivers/trusty/trusty-mem.c
+index 8a360298e501..7775ff76c38c 100644
+--- a/drivers/trusty/trusty-mem.c
++++ b/drivers/trusty/trusty-mem.c
+@@ -5,7 +5,6 @@
+ 
+ #include <linux/types.h>
+ #include <linux/printk.h>
+-#include <linux/trusty/arm_ffa.h>
+ #include <linux/trusty/trusty.h>
+ #include <linux/trusty/smcall.h>
+ 
+@@ -75,8 +74,6 @@ int trusty_encode_page_info(struct ns_mem_page_info *inf,
+ {
+ 	int mem_attr;
+ 	u64 pte;
+-	u8 ffa_mem_attr;
+-	u8 ffa_mem_perm = 0;
+ 
+ 	if (!inf || !page)
+ 		return -EINVAL;
+@@ -89,30 +86,6 @@ int trusty_encode_page_info(struct ns_mem_page_info *inf,
+ 	if (mem_attr < 0)
+ 		return mem_attr;
+ 
+-	switch (mem_attr) {
+-	case MEM_ATTR_STRONGLY_ORDERED:
+-		ffa_mem_attr = FFA_MEM_ATTR_DEVICE_NGNRNE;
+-		break;
+-
+-	case MEM_ATTR_DEVICE:
+-		ffa_mem_attr = FFA_MEM_ATTR_DEVICE_NGNRE;
+-		break;
+-
+-	case MEM_ATTR_NORMAL_NON_CACHEABLE:
+-		ffa_mem_attr = FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED;
+-		break;
+-
+-	case MEM_ATTR_NORMAL_WRITE_BACK_READ_ALLOCATE:
+-	case MEM_ATTR_NORMAL_WRITE_BACK_WRITE_ALLOCATE:
+-		ffa_mem_attr = FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB;
+-		break;
+-
+-	default:
+-		return -EINVAL;
+-	}
+-
+-	inf->paddr = pte;
+-
+ 	/* add other attributes */
+ #if defined(CONFIG_ARM64) || defined(CONFIG_ARM_LPAE)
+ 	pte |= pgprot_val(pgprot);
+@@ -123,16 +96,6 @@ int trusty_encode_page_info(struct ns_mem_page_info *inf,
+ 		pte |= ATTR_INNER_SHAREABLE; /* inner sharable */
+ #endif
+ 
+-	if (!(pte & ATTR_RDONLY))
+-		ffa_mem_perm |= FFA_MEM_PERM_RW;
+-	else
+-		ffa_mem_perm |= FFA_MEM_PERM_RO;
+-
+-	if ((pte & ATTR_INNER_SHAREABLE) == ATTR_INNER_SHAREABLE)
+-		ffa_mem_attr |= FFA_MEM_ATTR_INNER_SHAREABLE;
+-
+-	inf->ffa_mem_attr = ffa_mem_attr;
+-	inf->ffa_mem_perm = ffa_mem_perm;
+ 	inf->compat_attr = (pte & 0x0000FFFFFFFFFFFFull) |
+ 			   ((u64)mem_attr << 48);
+ 	return 0;
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 265eab52aea0..2dec75398f69 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -11,7 +11,6 @@
+ #include <linux/slab.h>
+ #include <linux/stat.h>
+ #include <linux/string.h>
+-#include <linux/trusty/arm_ffa.h>
+ #include <linux/trusty/smcall.h>
+ #include <linux/trusty/sm_err.h>
+ #include <linux/trusty/trusty.h>
+@@ -42,11 +41,6 @@ struct trusty_state {
+ 	struct list_head nop_queue;
+ 	spinlock_t nop_lock; /* protects nop_queue */
+ 	struct device_dma_parameters dma_parms;
+-	void *ffa_tx;
+-	void *ffa_rx;
+-	u16 ffa_local_id;
+-	u16 ffa_remote_id;
+-	struct mutex share_memory_msg_lock; /* protects share_memory_msg */
+ };
+ 
+ static inline unsigned long smc(unsigned long r0, unsigned long r1,
+@@ -246,19 +240,6 @@ int trusty_transfer_memory(struct device *dev, u64 *id,
+ 	struct ns_mem_page_info pg_inf;
+ 	struct scatterlist *sg;
+ 	size_t count;
+-	size_t i;
+-	size_t len;
+-	u64 ffa_handle = 0;
+-	size_t total_len;
+-	size_t endpoint_count = 1;
+-	struct ffa_mtd *mtd = s->ffa_tx;
+-	size_t comp_mrd_offset = offsetof(struct ffa_mtd, emad[endpoint_count]);
+-	struct ffa_comp_mrd *comp_mrd = s->ffa_tx + comp_mrd_offset;
+-	struct ffa_cons_mrd *cons_mrd = comp_mrd->address_range_array;
+-	size_t cons_mrd_offset = (void *)cons_mrd - s->ffa_tx;
+-	struct smc_ret8 smc_ret;
+-	u32 cookie_low;
+-	u32 cookie_high;
+ 
+ 	if (WARN_ON(dev->driver != &trusty_driver.driver))
+ 		return -EINVAL;
+@@ -284,126 +265,11 @@ int trusty_transfer_memory(struct device *dev, u64 *id,
+ 	if (ret) {
+ 		dev_err(s->dev, "%s: trusty_encode_page_info failed\n",
+ 			__func__);
+-		goto err_encode_page_info;
+-	}
+-
+-	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
+-		*id = pg_inf.compat_attr;
+-		return 0;
+-	}
+-
+-	len = 0;
+-	for_each_sg(sglist, sg, nents, i)
+-		len += sg_dma_len(sg);
+-
+-	mutex_lock(&s->share_memory_msg_lock);
+-
+-	mtd->sender_id = s->ffa_local_id;
+-	mtd->memory_region_attributes = pg_inf.ffa_mem_attr;
+-	mtd->reserved_3 = 0;
+-	mtd->flags = 0;
+-	mtd->handle = 0;
+-	mtd->tag = tag;
+-	mtd->reserved_24_27 = 0;
+-	mtd->emad_count = endpoint_count;
+-	for (i = 0; i < endpoint_count; i++) {
+-		struct ffa_emad *emad = &mtd->emad[i];
+-		/* TODO: support stream ids */
+-		emad->mapd.endpoint_id = s->ffa_remote_id;
+-		emad->mapd.memory_access_permissions = pg_inf.ffa_mem_perm;
+-		emad->mapd.flags = 0;
+-		emad->comp_mrd_offset = comp_mrd_offset;
+-		emad->reserved_8_15 = 0;
+-	}
+-	comp_mrd->total_page_count = len / PAGE_SIZE;
+-	comp_mrd->address_range_count = nents;
+-	comp_mrd->reserved_8_15 = 0;
+-
+-	total_len = cons_mrd_offset + nents * sizeof(*cons_mrd);
+-	sg = sglist;
+-	while (count) {
+-		size_t lcount =
+-			min_t(size_t, count, (PAGE_SIZE - cons_mrd_offset) /
+-			      sizeof(*cons_mrd));
+-		size_t fragment_len = lcount * sizeof(*cons_mrd) +
+-				      cons_mrd_offset;
+-
+-		for (i = 0; i < lcount; i++) {
+-			cons_mrd[i].address = sg_dma_address(sg);
+-			cons_mrd[i].page_count = sg_dma_len(sg) / PAGE_SIZE;
+-			cons_mrd[i].reserved_12_15 = 0;
+-			sg = sg_next(sg);
+-		}
+-		count -= lcount;
+-		if (cons_mrd_offset) {
+-			u32 smc = lend ? SMC_FC_FFA_MEM_LEND :
+-					 SMC_FC_FFA_MEM_SHARE;
+-			/* First fragment */
+-			smc_ret = trusty_smc8(smc, total_len,
+-					      fragment_len, 0, 0, 0, 0, 0);
+-		} else {
+-			smc_ret = trusty_smc8(SMC_FC_FFA_MEM_FRAG_TX,
+-					      cookie_low, cookie_high,
+-					      fragment_len, 0, 0, 0, 0);
+-		}
+-		if (smc_ret.r0 == SMC_FC_FFA_MEM_FRAG_RX) {
+-			cookie_low = smc_ret.r1;
+-			cookie_high = smc_ret.r2;
+-			dev_dbg(s->dev, "cookie %x %x", cookie_low,
+-				cookie_high);
+-			if (!count) {
+-				/*
+-				 * We have sent all our descriptors. Expected
+-				 * SMC_FC_FFA_SUCCESS, not a request to send
+-				 * another fragment.
+-				 */
+-				dev_err(s->dev, "%s: fragment_len %zd/%zd, unexpected SMC_FC_FFA_MEM_FRAG_RX\n",
+-					__func__, fragment_len, total_len);
+-				ret = -EIO;
+-				break;
+-			}
+-		} else if (smc_ret.r0 == SMC_FC_FFA_SUCCESS) {
+-			ffa_handle = smc_ret.r2 | (u64)smc_ret.r3 << 32;
+-			dev_dbg(s->dev, "%s: fragment_len %zu/%zu, got handle 0x%llx\n",
+-				__func__, fragment_len, total_len,
+-				ffa_handle);
+-			if (count) {
+-				/*
+-				 * We have not sent all our descriptors.
+-				 * Expected SMC_FC_FFA_MEM_FRAG_RX not
+-				 * SMC_FC_FFA_SUCCESS.
+-				 */
+-				dev_err(s->dev, "%s: fragment_len %zu/%zu, unexpected SMC_FC_FFA_SUCCESS, count %zu != 0\n",
+-					__func__, fragment_len, total_len,
+-					count);
+-				ret = -EIO;
+-				break;
+-			}
+-		} else {
+-			dev_err(s->dev, "%s: fragment_len %zu/%zu, SMC_FC_FFA_MEM_SHARE failed 0x%lx 0x%lx 0x%lx",
+-				__func__, fragment_len, total_len,
+-				smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-			ret = -EIO;
+-			break;
+-		}
+-
+-		cons_mrd = s->ffa_tx;
+-		cons_mrd_offset = 0;
+-	}
+-
+-	mutex_unlock(&s->share_memory_msg_lock);
+-
+-	if (!ret) {
+-		*id = ffa_handle;
+-		dev_dbg(s->dev, "%s: done\n", __func__);
+-		return 0;
++		return ret;
+ 	}
+ 
+-	dev_err(s->dev, "%s: failed %d", __func__, ret);
+-
+-err_encode_page_info:
+-	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
+-	return ret;
++	*id = pg_inf.compat_attr;
++	return 0;
+ }
+ EXPORT_SYMBOL(trusty_transfer_memory);
+ 
+@@ -433,8 +299,6 @@ int trusty_reclaim_memory(struct device *dev, u64 id,
+ 			  struct scatterlist *sglist, unsigned int nents)
+ {
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+-	int ret = 0;
+-	struct smc_ret8 smc_ret;
+ 
+ 	if (WARN_ON(dev->driver != &trusty_driver.driver))
+ 		return -EINVAL;
+@@ -454,28 +318,6 @@ int trusty_reclaim_memory(struct device *dev, u64 id,
+ 		return 0;
+ 	}
+ 
+-	mutex_lock(&s->share_memory_msg_lock);
+-
+-	smc_ret = trusty_smc8(SMC_FC_FFA_MEM_RECLAIM, (u32)id, id >> 32, 0, 0,
+-			      0, 0, 0);
+-	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
+-		dev_err(s->dev, "%s: SMC_FC_FFA_MEM_RECLAIM failed 0x%lx 0x%lx 0x%lx",
+-			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-		if (smc_ret.r0 == SMC_FC_FFA_ERROR &&
+-		    smc_ret.r2 == FFA_ERROR_DENIED)
+-			ret = -EBUSY;
+-		else
+-			ret = -EIO;
+-	}
+-
+-	mutex_unlock(&s->share_memory_msg_lock);
+-
+-	if (ret != 0)
+-		return ret;
+-
+-	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
+-
+-	dev_dbg(s->dev, "%s: done\n", __func__);
+ 	return 0;
+ }
+ EXPORT_SYMBOL(trusty_reclaim_memory);
+@@ -527,118 +369,6 @@ const char *trusty_version_str_get(struct device *dev)
+ }
+ EXPORT_SYMBOL(trusty_version_str_get);
+ 
+-static int trusty_init_msg_buf(struct trusty_state *s, struct device *dev)
+-{
+-	phys_addr_t tx_paddr;
+-	phys_addr_t rx_paddr;
+-	int ret;
+-	struct smc_ret8 smc_ret;
+-
+-	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ)
+-		return 0;
+-
+-	/* Get supported FF-A version and check if it is compatible */
+-	smc_ret = trusty_smc8(SMC_FC_FFA_VERSION, FFA_CURRENT_VERSION, 0, 0,
+-			      0, 0, 0, 0);
+-	if (FFA_VERSION_TO_MAJOR(smc_ret.r0) != FFA_CURRENT_VERSION_MAJOR) {
+-		dev_err(s->dev,
+-			"%s: Unsupported FF-A version 0x%lx, expected 0x%x\n",
+-			__func__, smc_ret.r0, FFA_CURRENT_VERSION);
+-		ret = -EIO;
+-		goto err_version;
+-	}
+-
+-	/* Check that SMC_FC_FFA_MEM_SHARE is implemented */
+-	smc_ret = trusty_smc8(SMC_FC_FFA_FEATURES, SMC_FC_FFA_MEM_SHARE, 0, 0,
+-			      0, 0, 0, 0);
+-	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
+-		dev_err(s->dev,
+-			"%s: SMC_FC_FFA_FEATURES(SMC_FC_FFA_MEM_SHARE) failed 0x%lx 0x%lx 0x%lx\n",
+-			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-		ret = -EIO;
+-		goto err_features;
+-	}
+-
+-	/*
+-	 * Set FF-A endpoint IDs.
+-	 *
+-	 * Hardcode 0x8000 for the secure os.
+-	 * TODO: Use FF-A call or device tree to configure this dynamically
+-	 */
+-	smc_ret = trusty_smc8(SMC_FC_FFA_ID_GET, 0, 0, 0, 0, 0, 0, 0);
+-	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
+-		dev_err(s->dev,
+-			"%s: SMC_FC_FFA_ID_GET failed 0x%lx 0x%lx 0x%lx\n",
+-			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-		ret = -EIO;
+-		goto err_id_get;
+-	}
+-
+-	s->ffa_local_id = smc_ret.r2;
+-	s->ffa_remote_id = 0x8000;
+-
+-	s->ffa_tx = kmalloc(PAGE_SIZE, GFP_KERNEL);
+-	if (!s->ffa_tx) {
+-		ret = -ENOMEM;
+-		goto err_alloc_tx;
+-	}
+-	tx_paddr = virt_to_phys(s->ffa_tx);
+-	if (WARN_ON(tx_paddr & (PAGE_SIZE - 1))) {
+-		ret = -EINVAL;
+-		goto err_unaligned_tx_buf;
+-	}
+-
+-	s->ffa_rx = kmalloc(PAGE_SIZE, GFP_KERNEL);
+-	if (!s->ffa_rx) {
+-		ret = -ENOMEM;
+-		goto err_alloc_rx;
+-	}
+-	rx_paddr = virt_to_phys(s->ffa_rx);
+-	if (WARN_ON(rx_paddr & (PAGE_SIZE - 1))) {
+-		ret = -EINVAL;
+-		goto err_unaligned_rx_buf;
+-	}
+-
+-	smc_ret = trusty_smc8(SMC_FCZ_FFA_RXTX_MAP, tx_paddr, rx_paddr, 1, 0,
+-			      0, 0, 0);
+-	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
+-		dev_err(s->dev, "%s: SMC_FCZ_FFA_RXTX_MAP failed 0x%lx 0x%lx 0x%lx\n",
+-			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-		ret = -EIO;
+-		goto err_rxtx_map;
+-	}
+-
+-	return 0;
+-
+-err_rxtx_map:
+-err_unaligned_rx_buf:
+-	kfree(s->ffa_rx);
+-	s->ffa_rx = NULL;
+-err_alloc_rx:
+-err_unaligned_tx_buf:
+-	kfree(s->ffa_tx);
+-	s->ffa_tx = NULL;
+-err_alloc_tx:
+-err_id_get:
+-err_features:
+-err_version:
+-	return ret;
+-}
+-
+-static void trusty_free_msg_buf(struct trusty_state *s, struct device *dev)
+-{
+-	struct smc_ret8 smc_ret;
+-
+-	smc_ret = trusty_smc8(SMC_FC_FFA_RXTX_UNMAP, 0, 0, 0, 0, 0, 0, 0);
+-	if (smc_ret.r0 != SMC_FC_FFA_SUCCESS) {
+-		dev_err(s->dev, "%s: SMC_FC_FFA_RXTX_UNMAP failed 0x%lx 0x%lx 0x%lx\n",
+-			__func__, smc_ret.r0, smc_ret.r1, smc_ret.r2);
+-	} else {
+-		kfree(s->ffa_rx);
+-		kfree(s->ffa_tx);
+-	}
+-}
+-
+ static void trusty_init_version(struct trusty_state *s, struct device *dev)
+ {
+ 	int ret;
+@@ -842,7 +572,6 @@ static int trusty_probe(struct platform_device *pdev)
+ 	spin_lock_init(&s->nop_lock);
+ 	INIT_LIST_HEAD(&s->nop_queue);
+ 	mutex_init(&s->smc_lock);
+-	mutex_init(&s->share_memory_msg_lock);
+ 	ATOMIC_INIT_NOTIFIER_HEAD(&s->notifier);
+ 	init_completion(&s->cpu_idle_completion);
+ 
+@@ -862,10 +591,6 @@ static int trusty_probe(struct platform_device *pdev)
+ 	if (ret < 0)
+ 		goto err_api_version;
+ 
+-	ret = trusty_init_msg_buf(s, &pdev->dev);
+-	if (ret < 0)
+-		goto err_init_msg_buf;
+-
+ 	s->nop_wq = alloc_workqueue("trusty-nop-wq", WQ_CPU_INTENSIVE, 0);
+ 	if (!s->nop_wq) {
+ 		ret = -ENODEV;
+@@ -910,13 +635,10 @@ static int trusty_probe(struct platform_device *pdev)
+ err_alloc_works:
+ 	destroy_workqueue(s->nop_wq);
+ err_create_nop_wq:
+-	trusty_free_msg_buf(s, &pdev->dev);
+-err_init_msg_buf:
+ err_api_version:
+ 	s->dev->dma_parms = NULL;
+ 	kfree(s->version_str);
+ 	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
+-	mutex_destroy(&s->share_memory_msg_lock);
+ 	mutex_destroy(&s->smc_lock);
+ 	kfree(s);
+ err_allocate_state:
+@@ -938,9 +660,7 @@ static int trusty_remove(struct platform_device *pdev)
+ 	free_percpu(s->nop_works);
+ 	destroy_workqueue(s->nop_wq);
+ 
+-	mutex_destroy(&s->share_memory_msg_lock);
+ 	mutex_destroy(&s->smc_lock);
+-	trusty_free_msg_buf(s, &pdev->dev);
+ 	s->dev->dma_parms = NULL;
+ 	kfree(s->version_str);
+ 	kfree(s);
+diff --git a/include/linux/trusty/arm_ffa.h b/include/linux/trusty/arm_ffa.h
+deleted file mode 100644
+index ab7b2afb794c..000000000000
+--- a/include/linux/trusty/arm_ffa.h
++++ /dev/null
+@@ -1,590 +0,0 @@
+-/* SPDX-License-Identifier: MIT */
+-/*
+- * Copyright (C) 2020 Google, Inc.
+- *
+- * Trusty and TF-A also have a copy of this header.
+- * Please keep the copies in sync.
+- */
+-#ifndef __LINUX_TRUSTY_ARM_FFA_H
+-#define __LINUX_TRUSTY_ARM_FFA_H
+-
+-/*
+- * Subset of Arm PSA Firmware Framework for Arm v8-A 1.0 EAC 1_0
+- * (https://developer.arm.com/docs/den0077/a) needed for shared memory.
+- */
+-
+-#include "smcall.h"
+-
+-#ifndef STATIC_ASSERT
+-#define STATIC_ASSERT(e) _Static_assert(e, #e)
+-#endif
+-
+-#define FFA_CURRENT_VERSION_MAJOR (1U)
+-#define FFA_CURRENT_VERSION_MINOR (0U)
+-
+-#define FFA_VERSION_TO_MAJOR(version) ((version) >> 16)
+-#define FFA_VERSION_TO_MINOR(version) ((version) & (0xffff))
+-#define FFA_VERSION(major, minor) (((major) << 16) | (minor))
+-#define FFA_CURRENT_VERSION \
+-	FFA_VERSION(FFA_CURRENT_VERSION_MAJOR, FFA_CURRENT_VERSION_MINOR)
+-
+-#define SMC_ENTITY_SHARED_MEMORY 4
+-
+-#define SMC_FASTCALL_NR_SHARED_MEMORY(nr) \
+-	SMC_FASTCALL_NR(SMC_ENTITY_SHARED_MEMORY, nr)
+-#define SMC_FASTCALL64_NR_SHARED_MEMORY(nr) \
+-	SMC_FASTCALL64_NR(SMC_ENTITY_SHARED_MEMORY, nr)
+-
+-/**
+- * typedef ffa_endpoint_id16_t - Endpoint ID
+- *
+- * Current implementation only supports VMIDs. FFA spec also support stream
+- * endpoint ids.
+- */
+-typedef uint16_t ffa_endpoint_id16_t;
+-
+-/**
+- * struct ffa_cons_mrd - Constituent memory region descriptor
+- * @address:
+- *         Start address of contiguous memory region. Must be 4K page aligned.
+- * @page_count:
+- *         Number of 4K pages in region.
+- * @reserved_12_15:
+- *         Reserve bytes 12-15 to pad struct size to 16 bytes.
+- */
+-struct ffa_cons_mrd {
+-	uint64_t address;
+-	uint32_t page_count;
+-	uint32_t reserved_12_15;
+-};
+-STATIC_ASSERT(sizeof(struct ffa_cons_mrd) == 16);
+-
+-/**
+- * struct ffa_comp_mrd - Composite memory region descriptor
+- * @total_page_count:
+- *         Number of 4k pages in memory region. Must match sum of
+- *         @address_range_array[].page_count.
+- * @address_range_count:
+- *         Number of entries in @address_range_array.
+- * @reserved_8_15:
+- *         Reserve bytes 8-15 to pad struct size to 16 byte alignment and
+- *         make @address_range_array 16 byte aligned.
+- * @address_range_array:
+- *         Array of &struct ffa_cons_mrd entries.
+- */
+-struct ffa_comp_mrd {
+-	uint32_t total_page_count;
+-	uint32_t address_range_count;
+-	uint64_t reserved_8_15;
+-	struct ffa_cons_mrd address_range_array[];
+-};
+-STATIC_ASSERT(sizeof(struct ffa_comp_mrd) == 16);
+-
+-/**
+- * typedef ffa_mem_attr8_t - Memory region attributes
+- *
+- * * @FFA_MEM_ATTR_DEVICE_NGNRNE:
+- *     Device-nGnRnE.
+- * * @FFA_MEM_ATTR_DEVICE_NGNRE:
+- *     Device-nGnRE.
+- * * @FFA_MEM_ATTR_DEVICE_NGRE:
+- *     Device-nGRE.
+- * * @FFA_MEM_ATTR_DEVICE_GRE:
+- *     Device-GRE.
+- * * @FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED
+- *     Normal memory. Non-cacheable.
+- * * @FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB
+- *     Normal memory. Write-back cached.
+- * * @FFA_MEM_ATTR_NON_SHAREABLE
+- *     Non-shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
+- * * @FFA_MEM_ATTR_OUTER_SHAREABLE
+- *     Outer Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
+- * * @FFA_MEM_ATTR_INNER_SHAREABLE
+- *     Inner Shareable. Combine with FFA_MEM_ATTR_NORMAL_MEMORY_*.
+- */
+-typedef uint8_t ffa_mem_attr8_t;
+-#define FFA_MEM_ATTR_DEVICE_NGNRNE ((1U << 4) | (0x0U << 2))
+-#define FFA_MEM_ATTR_DEVICE_NGNRE ((1U << 4) | (0x1U << 2))
+-#define FFA_MEM_ATTR_DEVICE_NGRE ((1U << 4) | (0x2U << 2))
+-#define FFA_MEM_ATTR_DEVICE_GRE ((1U << 4) | (0x3U << 2))
+-#define FFA_MEM_ATTR_NORMAL_MEMORY_UNCACHED ((2U << 4) | (0x1U << 2))
+-#define FFA_MEM_ATTR_NORMAL_MEMORY_CACHED_WB ((2U << 4) | (0x3U << 2))
+-#define FFA_MEM_ATTR_NON_SHAREABLE (0x0U << 0)
+-#define FFA_MEM_ATTR_OUTER_SHAREABLE (0x2U << 0)
+-#define FFA_MEM_ATTR_INNER_SHAREABLE (0x3U << 0)
+-
+-/**
+- * typedef ffa_mem_perm8_t - Memory access permissions
+- *
+- * * @FFA_MEM_ATTR_RO
+- *     Request or specify read-only mapping.
+- * * @FFA_MEM_ATTR_RW
+- *     Request or allow read-write mapping.
+- * * @FFA_MEM_PERM_NX
+- *     Deny executable mapping.
+- * * @FFA_MEM_PERM_X
+- *     Request executable mapping.
+- */
+-typedef uint8_t ffa_mem_perm8_t;
+-#define FFA_MEM_PERM_RO (1U << 0)
+-#define FFA_MEM_PERM_RW (1U << 1)
+-#define FFA_MEM_PERM_NX (1U << 2)
+-#define FFA_MEM_PERM_X (1U << 3)
+-
+-/**
+- * typedef ffa_mem_flag8_t - Endpoint memory flags
+- *
+- * * @FFA_MEM_FLAG_OTHER
+- *     Other borrower. Memory region must not be or was not retrieved on behalf
+- *     of this endpoint.
+- */
+-typedef uint8_t ffa_mem_flag8_t;
+-#define FFA_MEM_FLAG_OTHER (1U << 0)
+-
+-/**
+- * typedef ffa_mtd_flag32_t - Memory transaction descriptor flags
+- *
+- * * @FFA_MTD_FLAG_ZERO_MEMORY
+- *     Zero memory after unmapping from sender (must be 0 for share).
+- * * @FFA_MTD_FLAG_TIME_SLICING
+- *     Not supported by this implementation.
+- * * @FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH
+- *     Zero memory after unmapping from borrowers (must be 0 for share).
+- * * @FFA_MTD_FLAG_TYPE_MASK
+- *     Bit-mask to extract memory management transaction type from flags.
+- * * @FFA_MTD_FLAG_TYPE_SHARE_MEMORY
+- *     Share memory transaction flag.
+- *     Used by @SMC_FC_FFA_MEM_RETRIEVE_RESP to indicate that memory came from
+- *     @SMC_FC_FFA_MEM_SHARE and by @SMC_FC_FFA_MEM_RETRIEVE_REQ to specify that
+- *     it must have.
+- * * @FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK
+- *     Not supported by this implementation.
+- */
+-typedef uint32_t ffa_mtd_flag32_t;
+-#define FFA_MTD_FLAG_ZERO_MEMORY (1U << 0)
+-#define FFA_MTD_FLAG_TIME_SLICING (1U << 1)
+-#define FFA_MTD_FLAG_ZERO_MEMORY_AFTER_RELINQUISH (1U << 2)
+-#define FFA_MTD_FLAG_TYPE_MASK (3U << 3)
+-#define FFA_MTD_FLAG_TYPE_SHARE_MEMORY (1U << 3)
+-#define FFA_MTD_FLAG_ADDRESS_RANGE_ALIGNMENT_HINT_MASK (0x1FU << 5)
+-
+-/**
+- * struct ffa_mapd - Memory access permissions descriptor
+- * @endpoint_id:
+- *         Endpoint id that @memory_access_permissions and @flags apply to.
+- *         (&typedef ffa_endpoint_id16_t).
+- * @memory_access_permissions:
+- *         FFA_MEM_PERM_* values or'ed together (&typedef ffa_mem_perm8_t).
+- * @flags:
+- *         FFA_MEM_FLAG_* values or'ed together (&typedef ffa_mem_flag8_t).
+- */
+-struct ffa_mapd {
+-	ffa_endpoint_id16_t endpoint_id;
+-	ffa_mem_perm8_t memory_access_permissions;
+-	ffa_mem_flag8_t flags;
+-};
+-STATIC_ASSERT(sizeof(struct ffa_mapd) == 4);
+-
+-/**
+- * struct ffa_emad - Endpoint memory access descriptor.
+- * @mapd:  &struct ffa_mapd.
+- * @comp_mrd_offset:
+- *         Offset of &struct ffa_comp_mrd form start of &struct ffa_mtd.
+- * @reserved_8_15:
+- *         Reserved bytes 8-15. Must be 0.
+- */
+-struct ffa_emad {
+-	struct ffa_mapd mapd;
+-	uint32_t comp_mrd_offset;
+-	uint64_t reserved_8_15;
+-};
+-STATIC_ASSERT(sizeof(struct ffa_emad) == 16);
+-
+-/**
+- * struct ffa_mtd - Memory transaction descriptor.
+- * @sender_id:
+- *         Sender endpoint id.
+- * @memory_region_attributes:
+- *         FFA_MEM_ATTR_* values or'ed together (&typedef ffa_mem_attr8_t).
+- * @reserved_3:
+- *         Reserved bytes 3. Must be 0.
+- * @flags:
+- *         FFA_MTD_FLAG_* values or'ed together (&typedef ffa_mtd_flag32_t).
+- * @handle:
+- *         Id of shared memory object. Most be 0 for MEM_SHARE.
+- * @tag:   Client allocated tag. Must match original value.
+- * @reserved_24_27:
+- *         Reserved bytes 24-27. Must be 0.
+- * @emad_count:
+- *         Number of entries in @emad. Must be 1 in current implementation.
+- *         FFA spec allows more entries.
+- * @emad:
+- *         Endpoint memory access descriptor array (see @struct ffa_emad).
+- */
+-struct ffa_mtd {
+-	ffa_endpoint_id16_t sender_id;
+-	ffa_mem_attr8_t memory_region_attributes;
+-	uint8_t reserved_3;
+-	ffa_mtd_flag32_t flags;
+-	uint64_t handle;
+-	uint64_t tag;
+-	uint32_t reserved_24_27;
+-	uint32_t emad_count;
+-	struct ffa_emad emad[];
+-};
+-STATIC_ASSERT(sizeof(struct ffa_mtd) == 32);
+-
+-/**
+- * struct ffa_mem_relinquish_descriptor - Relinquish request descriptor.
+- * @handle:
+- *         Id of shared memory object to relinquish.
+- * @flags:
+- *         If bit 0 is set clear memory after unmapping from borrower. Must be 0
+- *         for share. Bit[1]: Time slicing. Not supported, must be 0. All other
+- *         bits are reserved 0.
+- * @endpoint_count:
+- *         Number of entries in @endpoint_array.
+- * @endpoint_array:
+- *         Array of endpoint ids.
+- */
+-struct ffa_mem_relinquish_descriptor {
+-	uint64_t handle;
+-	uint32_t flags;
+-	uint32_t endpoint_count;
+-	ffa_endpoint_id16_t endpoint_array[];
+-};
+-STATIC_ASSERT(sizeof(struct ffa_mem_relinquish_descriptor) == 16);
+-
+-/**
+- * enum ffa_error - FF-A error code
+- * @FFA_ERROR_NOT_SUPPORTED:
+- *         Operation contained possibly valid parameters not supported by the
+- *         current implementation. Does not match FF-A 1.0 EAC 1_0 definition.
+- * @FFA_ERROR_INVALID_PARAMETERS:
+- *         Invalid parameters. Conditions function specific.
+- * @FFA_ERROR_NO_MEMORY:
+- *         Not enough memory.
+- * @FFA_ERROR_DENIED:
+- *         Operation not allowed. Conditions function specific.
+- *
+- * FF-A 1.0 EAC 1_0 defines other error codes as well but the current
+- * implementation does not use them.
+- */
+-enum ffa_error {
+-	FFA_ERROR_NOT_SUPPORTED = -1,
+-	FFA_ERROR_INVALID_PARAMETERS = -2,
+-	FFA_ERROR_NO_MEMORY = -3,
+-	FFA_ERROR_DENIED = -6,
+-};
+-
+-/**
+- * SMC_FC32_FFA_MIN - First 32 bit SMC opcode reserved for FFA
+- */
+-#define SMC_FC32_FFA_MIN SMC_FASTCALL_NR_SHARED_MEMORY(0x60)
+-
+-/**
+- * SMC_FC32_FFA_MAX - Last 32 bit SMC opcode reserved for FFA
+- */
+-#define SMC_FC32_FFA_MAX SMC_FASTCALL_NR_SHARED_MEMORY(0x7F)
+-
+-/**
+- * SMC_FC64_FFA_MIN - First 64 bit SMC opcode reserved for FFA
+- */
+-#define SMC_FC64_FFA_MIN SMC_FASTCALL64_NR_SHARED_MEMORY(0x60)
+-
+-/**
+- * SMC_FC64_FFA_MAX - Last 64 bit SMC opcode reserved for FFA
+- */
+-#define SMC_FC64_FFA_MAX SMC_FASTCALL64_NR_SHARED_MEMORY(0x7F)
+-
+-/**
+- * SMC_FC_FFA_ERROR - SMC error return opcode
+- *
+- * Register arguments:
+- *
+- * * w1:     VMID in [31:16], vCPU in [15:0]
+- * * w2:     Error code (&enum ffa_error)
+- */
+-#define SMC_FC_FFA_ERROR SMC_FASTCALL_NR_SHARED_MEMORY(0x60)
+-
+-/**
+- * SMC_FC_FFA_SUCCESS - 32 bit SMC success return opcode
+- *
+- * Register arguments:
+- *
+- * * w1:     VMID in [31:16], vCPU in [15:0]
+- * * w2-w7:  Function specific
+- */
+-#define SMC_FC_FFA_SUCCESS SMC_FASTCALL_NR_SHARED_MEMORY(0x61)
+-
+-/**
+- * SMC_FC64_FFA_SUCCESS - 64 bit SMC success return opcode
+- *
+- * Register arguments:
+- *
+- * * w1:             VMID in [31:16], vCPU in [15:0]
+- * * w2/x2-w7/x7:    Function specific
+- */
+-#define SMC_FC64_FFA_SUCCESS SMC_FASTCALL64_NR_SHARED_MEMORY(0x61)
+-
+-/**
+- * SMC_FC_FFA_VERSION - SMC opcode to return supported FF-A version
+- *
+- * Register arguments:
+- *
+- * * w1:     Major version bit[30:16] and minor version in bit[15:0] supported
+- *           by caller. Bit[31] must be 0.
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- * * w2:     Major version bit[30:16], minor version in bit[15:0], bit[31] must
+- *           be 0.
+- *
+- * or
+- *
+- * * w0:     SMC_FC_FFA_ERROR
+- * * w2:     FFA_ERROR_NOT_SUPPORTED if major version passed in is less than the
+- *           minimum major version supported.
+- */
+-#define SMC_FC_FFA_VERSION SMC_FASTCALL_NR_SHARED_MEMORY(0x63)
+-
+-/**
+- * SMC_FC_FFA_FEATURES - SMC opcode to check optional feature support
+- *
+- * Register arguments:
+- *
+- * * w1:     FF-A function ID
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- * * w2:     Bit[0]: Supports custom buffers for memory transactions.
+- *           Bit[1:0]: For RXTX_MAP min buffer size and alignment boundary.
+- *           Other bits must be 0.
+- * * w3:     For FFA_MEM_RETRIEVE_REQ, bit[7-0]: Number of times receiver can
+- *           retrieve each memory region before relinquishing it specified as
+- *           ((1U << (value + 1)) - 1 (or value = bits in reference count - 1).
+- *           For all other bits and commands: must be 0.
+- * or
+- *
+- * * w0:     SMC_FC_FFA_ERROR
+- * * w2:     FFA_ERROR_NOT_SUPPORTED if function is not implemented, or
+- *           FFA_ERROR_INVALID_PARAMETERS if function id is not valid.
+- */
+-#define SMC_FC_FFA_FEATURES SMC_FASTCALL_NR_SHARED_MEMORY(0x64)
+-
+-/**
+- * SMC_FC_FFA_RXTX_MAP - 32 bit SMC opcode to map message buffers
+- *
+- * Register arguments:
+- *
+- * * w1:     TX address
+- * * w2:     RX address
+- * * w3:     RX/TX page count in bit[5:0]
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- */
+-#define SMC_FC_FFA_RXTX_MAP SMC_FASTCALL_NR_SHARED_MEMORY(0x66)
+-
+-/**
+- * SMC_FC64_FFA_RXTX_MAP - 64 bit SMC opcode to map message buffers
+- *
+- * Register arguments:
+- *
+- * * x1:     TX address
+- * * x2:     RX address
+- * * x3:     RX/TX page count in bit[5:0]
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- */
+-#define SMC_FC64_FFA_RXTX_MAP SMC_FASTCALL64_NR_SHARED_MEMORY(0x66)
+-#ifdef CONFIG_64BIT
+-#define SMC_FCZ_FFA_RXTX_MAP SMC_FC64_FFA_RXTX_MAP
+-#else
+-#define SMC_FCZ_FFA_RXTX_MAP SMC_FC_FFA_RXTX_MAP
+-#endif
+-
+-/**
+- * SMC_FC_FFA_RXTX_UNMAP - SMC opcode to unmap message buffers
+- *
+- * Register arguments:
+- *
+- * * w1:     ID in [31:16]
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- */
+-#define SMC_FC_FFA_RXTX_UNMAP SMC_FASTCALL_NR_SHARED_MEMORY(0x67)
+-
+-/**
+- * SMC_FC_FFA_ID_GET - SMC opcode to get endpoint id of caller
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- * * w2:     ID in bit[15:0], bit[31:16] must be 0.
+- */
+-#define SMC_FC_FFA_ID_GET SMC_FASTCALL_NR_SHARED_MEMORY(0x69)
+-
+-/**
+- * SMC_FC_FFA_MEM_DONATE - 32 bit SMC opcode to donate memory
+- *
+- * Not supported.
+- */
+-#define SMC_FC_FFA_MEM_DONATE SMC_FASTCALL_NR_SHARED_MEMORY(0x71)
+-
+-/**
+- * SMC_FC_FFA_MEM_LEND - 32 bit SMC opcode to lend memory
+- *
+- * Not currently supported.
+- */
+-#define SMC_FC_FFA_MEM_LEND SMC_FASTCALL_NR_SHARED_MEMORY(0x72)
+-
+-/**
+- * SMC_FC_FFA_MEM_SHARE - 32 bit SMC opcode to share memory
+- *
+- * Register arguments:
+- *
+- * * w1:     Total length
+- * * w2:     Fragment length
+- * * w3:     Address
+- * * w4:     Page count
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- * * w2/w3:  Handle
+- *
+- * or
+- *
+- * * w0:     &SMC_FC_FFA_MEM_FRAG_RX
+- * * w1-:    See &SMC_FC_FFA_MEM_FRAG_RX
+- *
+- * or
+- *
+- * * w0:     SMC_FC_FFA_ERROR
+- * * w2:     Error code (&enum ffa_error)
+- */
+-#define SMC_FC_FFA_MEM_SHARE SMC_FASTCALL_NR_SHARED_MEMORY(0x73)
+-
+-/**
+- * SMC_FC64_FFA_MEM_SHARE - 64 bit SMC opcode to share memory
+- *
+- * Register arguments:
+- *
+- * * w1:     Total length
+- * * w2:     Fragment length
+- * * x3:     Address
+- * * w4:     Page count
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- * * w2/w3:  Handle
+- *
+- * or
+- *
+- * * w0:     &SMC_FC_FFA_MEM_FRAG_RX
+- * * w1-:    See &SMC_FC_FFA_MEM_FRAG_RX
+- *
+- * or
+- *
+- * * w0:     SMC_FC_FFA_ERROR
+- * * w2:     Error code (&enum ffa_error)
+- */
+-#define SMC_FC64_FFA_MEM_SHARE SMC_FASTCALL64_NR_SHARED_MEMORY(0x73)
+-
+-/**
+- * SMC_FC_FFA_MEM_RETRIEVE_REQ - 32 bit SMC opcode to retrieve shared memory
+- *
+- * Register arguments:
+- *
+- * * w1:     Total length
+- * * w2:     Fragment length
+- * * w3:     Address
+- * * w4:     Page count
+- *
+- * Return:
+- * * w0:             &SMC_FC_FFA_MEM_RETRIEVE_RESP
+- * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_RETRIEVE_RESP
+- */
+-#define SMC_FC_FFA_MEM_RETRIEVE_REQ SMC_FASTCALL_NR_SHARED_MEMORY(0x74)
+-
+-/**
+- * SMC_FC64_FFA_MEM_RETRIEVE_REQ - 64 bit SMC opcode to retrieve shared memory
+- *
+- * Register arguments:
+- *
+- * * w1:     Total length
+- * * w2:     Fragment length
+- * * x3:     Address
+- * * w4:     Page count
+- *
+- * Return:
+- * * w0:             &SMC_FC_FFA_MEM_RETRIEVE_RESP
+- * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_RETRIEVE_RESP
+- */
+-#define SMC_FC64_FFA_MEM_RETRIEVE_REQ SMC_FASTCALL64_NR_SHARED_MEMORY(0x74)
+-
+-/**
+- * SMC_FC_FFA_MEM_RETRIEVE_RESP - Retrieve 32 bit SMC return opcode
+- *
+- * Register arguments:
+- *
+- * * w1:     Total length
+- * * w2:     Fragment length
+- */
+-#define SMC_FC_FFA_MEM_RETRIEVE_RESP SMC_FASTCALL_NR_SHARED_MEMORY(0x75)
+-
+-/**
+- * SMC_FC_FFA_MEM_RELINQUISH - SMC opcode to relinquish shared memory
+- *
+- * Input in &struct ffa_mem_relinquish_descriptor format in message buffer.
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- */
+-#define SMC_FC_FFA_MEM_RELINQUISH SMC_FASTCALL_NR_SHARED_MEMORY(0x76)
+-
+-/**
+- * SMC_FC_FFA_MEM_RECLAIM - SMC opcode to reclaim shared memory
+- *
+- * Register arguments:
+- *
+- * * w1/w2:  Handle
+- * * w3:     Flags
+- *
+- * Return:
+- * * w0:     &SMC_FC_FFA_SUCCESS
+- */
+-#define SMC_FC_FFA_MEM_RECLAIM SMC_FASTCALL_NR_SHARED_MEMORY(0x77)
+-
+-/**
+- * SMC_FC_FFA_MEM_FRAG_RX - SMC opcode to request next fragment.
+- *
+- * Register arguments:
+- *
+- * * w1/w2:  Cookie
+- * * w3:     Fragment offset.
+- * * w4:     Endpoint id ID in [31:16], if client is hypervisor.
+- *
+- * Return:
+- * * w0:             &SMC_FC_FFA_MEM_FRAG_TX
+- * * w1/x1-w5/x5:    See &SMC_FC_FFA_MEM_FRAG_TX
+- */
+-#define SMC_FC_FFA_MEM_FRAG_RX SMC_FASTCALL_NR_SHARED_MEMORY(0x7A)
+-
+-/**
+- * SMC_FC_FFA_MEM_FRAG_TX - SMC opcode to transmit next fragment
+- *
+- * Register arguments:
+- *
+- * * w1/w2:  Cookie
+- * * w3:     Fragment length.
+- * * w4:     Sender endpoint id ID in [31:16], if client is hypervisor.
+- *
+- * Return:
+- * * w0:             &SMC_FC_FFA_MEM_FRAG_RX or &SMC_FC_FFA_SUCCESS.
+- * * w1/x1-w5/x5:    See opcode in w0.
+- */
+-#define SMC_FC_FFA_MEM_FRAG_TX SMC_FASTCALL_NR_SHARED_MEMORY(0x7B)
+-
+-#endif /* __LINUX_TRUSTY_ARM_FFA_H */
+diff --git a/include/linux/trusty/trusty.h b/include/linux/trusty/trusty.h
+index efbb36999a8b..272d96c1c696 100644
+--- a/include/linux/trusty/trusty.h
++++ b/include/linux/trusty/trusty.h
+@@ -52,9 +52,6 @@ u32 trusty_get_api_version(struct device *dev);
+ bool trusty_get_panic_status(struct device *dev);
+ 
+ struct ns_mem_page_info {
+-	u64 paddr;
+-	u8 ffa_mem_attr;
+-	u8 ffa_mem_perm;
+ 	u64 compat_attr;
+ };
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0037-ANDROID-trusty-Rename-transfer-memory-function-to-le.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0037-ANDROID-trusty-Rename-transfer-memory-function-to-le.patch
new file mode 100644
index 0000000..a7bc060
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0037-ANDROID-trusty-Rename-transfer-memory-function-to-le.patch
@@ -0,0 +1,191 @@
+From 804ef860d9757cbe31b606fd5ec68cc5454c88f8 Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Tue, 18 Jan 2022 18:27:09 +0000
+Subject: [PATCH 24/32] ANDROID: trusty: Rename transfer memory function to
+ lend memory
+
+Renaming trusty_transfer_memory to trusty_lend_memory allows Trusty
+to export memory operation like share, lend, reclaim and use common
+code for memory share and lend operations.
+
+Define TRUSTY_DEFAULT_MEM_OBJ_TAG as 0 and use that in existing calls.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Ie165a609cc4398bb916967595d0b748d54d75faf
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/trusty-ipc.c    | 14 ++++++++----
+ drivers/trusty/trusty-test.c   |  3 ++-
+ drivers/trusty/trusty-virtio.c |  3 ++-
+ drivers/trusty/trusty.c        | 41 ++++++++++++++++++++++------------
+ include/linux/trusty/trusty.h  | 11 ++++-----
+ 5 files changed, 47 insertions(+), 25 deletions(-)
+
+diff --git a/drivers/trusty/trusty-ipc.c b/drivers/trusty/trusty-ipc.c
+index 82d6ddeb41f4..0a27af2063a7 100644
+--- a/drivers/trusty/trusty-ipc.c
++++ b/drivers/trusty/trusty-ipc.c
+@@ -1233,10 +1233,16 @@ static int dn_share_fd(struct tipc_dn_chan *dn, int fd,
+ 		goto cleanup_handle;
+ 	}
+ 
+-	ret = trusty_transfer_memory(tipc_shared_handle_dev(shared_handle),
+-				     &mem_id, shared_handle->sgt->sgl,
+-				     shared_handle->sgt->orig_nents, prot, tag,
+-				     lend);
++	if (lend)
++		ret = trusty_lend_memory(tipc_shared_handle_dev(shared_handle),
++					 &mem_id, shared_handle->sgt->sgl,
++					 shared_handle->sgt->orig_nents, prot,
++					 tag);
++	else
++		ret = trusty_share_memory(tipc_shared_handle_dev(shared_handle),
++					  &mem_id, shared_handle->sgt->sgl,
++					  shared_handle->sgt->orig_nents, prot,
++					  tag);
+ 
+ 	if (ret < 0) {
+ 		dev_dbg(dev, "Transferring memory failed: %d\n", ret);
+diff --git a/drivers/trusty/trusty-test.c b/drivers/trusty/trusty-test.c
+index 844868981fa5..c25fc0f2fcf0 100644
+--- a/drivers/trusty/trusty-test.c
++++ b/drivers/trusty/trusty-test.c
+@@ -138,7 +138,8 @@ static int trusty_test_share_objs(struct trusty_test_state *s,
+ 		t1 = ktime_get();
+ 		tmpret = trusty_share_memory(s->trusty_dev, &obj->mem_id,
+ 					     obj->sgt.sgl, obj->sgt.nents,
+-					     PAGE_KERNEL);
++					     PAGE_KERNEL,
++					     TRUSTY_DEFAULT_MEM_OBJ_TAG);
+ 		t2 = ktime_get();
+ 		if (tmpret) {
+ 			ret = tmpret;
+diff --git a/drivers/trusty/trusty-virtio.c b/drivers/trusty/trusty-virtio.c
+index fea59cd2e218..365e7c04bcf4 100644
+--- a/drivers/trusty/trusty-virtio.c
++++ b/drivers/trusty/trusty-virtio.c
+@@ -626,7 +626,8 @@ static int trusty_virtio_add_devices(struct trusty_ctx *tctx)
+ 
+ 	sg_init_one(&tctx->shared_sg, descr_va, descr_buf_sz);
+ 	ret = trusty_share_memory(tctx->dev->parent, &descr_id,
+-				  &tctx->shared_sg, 1, PAGE_KERNEL);
++				  &tctx->shared_sg, 1, PAGE_KERNEL,
++				  TRUSTY_DEFAULT_MEM_OBJ_TAG);
+ 	if (ret) {
+ 		dev_err(tctx->dev, "trusty_share_memory failed: %d\n", ret);
+ 		goto err_share_memory;
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 2dec75398f69..6bd30bc1bbc9 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -222,18 +222,9 @@ s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
+ }
+ EXPORT_SYMBOL(trusty_std_call32);
+ 
+-int trusty_share_memory(struct device *dev, u64 *id,
+-			struct scatterlist *sglist, unsigned int nents,
+-			pgprot_t pgprot)
+-{
+-	return trusty_transfer_memory(dev, id, sglist, nents, pgprot, 0,
+-				      false);
+-}
+-EXPORT_SYMBOL(trusty_share_memory);
+-
+-int trusty_transfer_memory(struct device *dev, u64 *id,
+-			   struct scatterlist *sglist, unsigned int nents,
+-			   pgprot_t pgprot, u64 tag, bool lend)
++static int __trusty_share_memory(struct device *dev, u64 *id,
++				 struct scatterlist *sglist, unsigned int nents,
++				 pgprot_t pgprot, u64 tag, bool mem_share)
+ {
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+ 	int ret;
+@@ -253,6 +244,12 @@ int trusty_transfer_memory(struct device *dev, u64 *id,
+ 		return -EOPNOTSUPP;
+ 	}
+ 
++	if (mem_share == false && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		dev_err(s->dev, "%s: old trusty version does not support lending memory objects\n",
++			__func__);
++		return -EOPNOTSUPP;
++	}
++
+ 	count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
+ 	if (count != nents) {
+ 		dev_err(s->dev, "failed to dma map sg_table\n");
+@@ -271,7 +268,22 @@ int trusty_transfer_memory(struct device *dev, u64 *id,
+ 	*id = pg_inf.compat_attr;
+ 	return 0;
+ }
+-EXPORT_SYMBOL(trusty_transfer_memory);
++
++int trusty_share_memory(struct device *dev, u64 *id,
++			struct scatterlist *sglist, unsigned int nents,
++			pgprot_t pgprot, u64 tag)
++{
++	return __trusty_share_memory(dev, id, sglist, nents, pgprot, tag, true);
++}
++EXPORT_SYMBOL(trusty_share_memory);
++
++int trusty_lend_memory(struct device *dev, u64 *id,
++		       struct scatterlist *sglist, unsigned int nents,
++		       pgprot_t pgprot, u64 tag)
++{
++	return __trusty_share_memory(dev, id, sglist, nents, pgprot, tag, false);
++}
++EXPORT_SYMBOL(trusty_lend_memory);
+ 
+ /*
+  * trusty_share_memory_compat - trusty_share_memory wrapper for old apis
+@@ -287,7 +299,8 @@ int trusty_share_memory_compat(struct device *dev, u64 *id,
+ 	int ret;
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+ 
+-	ret = trusty_share_memory(dev, id, sglist, nents, pgprot);
++	ret = trusty_share_memory(dev, id, sglist, nents, pgprot,
++				  TRUSTY_DEFAULT_MEM_OBJ_TAG);
+ 	if (!ret && s->api_version < TRUSTY_API_VERSION_PHYS_MEM_OBJ)
+ 		*id &= 0x0000FFFFFFFFF000ull;
+ 
+diff --git a/include/linux/trusty/trusty.h b/include/linux/trusty/trusty.h
+index 272d96c1c696..27f635f2d12d 100644
+--- a/include/linux/trusty/trusty.h
++++ b/include/linux/trusty/trusty.h
+@@ -11,6 +11,7 @@
+ #include <linux/device.h>
+ #include <linux/pagemap.h>
+ 
++#define TRUSTY_DEFAULT_MEM_OBJ_TAG	(0)
+ 
+ #if IS_ENABLED(CONFIG_TRUSTY)
+ s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2);
+@@ -62,13 +63,13 @@ struct scatterlist;
+ typedef u64 trusty_shared_mem_id_t;
+ int trusty_share_memory(struct device *dev, trusty_shared_mem_id_t *id,
+ 			struct scatterlist *sglist, unsigned int nents,
+-			pgprot_t pgprot);
++			pgprot_t pgprot, u64 tag);
+ int trusty_share_memory_compat(struct device *dev, trusty_shared_mem_id_t *id,
+ 			       struct scatterlist *sglist, unsigned int nents,
+ 			       pgprot_t pgprot);
+-int trusty_transfer_memory(struct device *dev, u64 *id,
+-			   struct scatterlist *sglist, unsigned int nents,
+-			   pgprot_t pgprot, u64 tag, bool lend);
++int trusty_lend_memory(struct device *dev, u64 *id,
++		       struct scatterlist *sglist, unsigned int nents,
++		       pgprot_t pgprot, u64 tag);
+ int trusty_reclaim_memory(struct device *dev, trusty_shared_mem_id_t id,
+ 			  struct scatterlist *sglist, unsigned int nents);
+ 
+@@ -78,7 +79,7 @@ u64 trusty_dma_buf_get_ffa_tag(struct dma_buf *dma_buf);
+ #else
+ static inline u64 trusty_dma_buf_get_ffa_tag(struct dma_buf *dma_buf)
+ {
+-	return 0;
++	return TRUSTY_DEFAULT_MEM_OBJ_TAG;
+ }
+ #endif
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0038-ANDROID-trusty-Separate-out-SMC-based-transport.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0038-ANDROID-trusty-Separate-out-SMC-based-transport.patch
new file mode 100644
index 0000000..c4ff31c
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0038-ANDROID-trusty-Separate-out-SMC-based-transport.patch
@@ -0,0 +1,495 @@
+From 844cdefb8b0f6b1f75cf4cbaa2d9260959a26e02 Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 14:02:39 +0000
+Subject: [PATCH 25/32] ANDROID: trusty: Separate out SMC based transport
+
+This commit refactors SMC based transport operation like
+smc_fastcalls, smc memory operations in a separate file.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Iebee505b7172f6247186e3bf1e0b50740b2e4dfa
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/Makefile         |   1 +
+ drivers/trusty/trusty-private.h |  61 ++++++++++++++
+ drivers/trusty/trusty-smc.c     | 136 ++++++++++++++++++++++++++++++
+ drivers/trusty/trusty.c         | 144 +++++++++-----------------------
+ 4 files changed, 237 insertions(+), 105 deletions(-)
+ create mode 100644 drivers/trusty/trusty-private.h
+ create mode 100644 drivers/trusty/trusty-smc.c
+
+diff --git a/drivers/trusty/Makefile b/drivers/trusty/Makefile
+index 2cf1cfccf97b..fbb53ee93003 100644
+--- a/drivers/trusty/Makefile
++++ b/drivers/trusty/Makefile
+@@ -5,6 +5,7 @@
+ 
+ obj-$(CONFIG_TRUSTY)		+= trusty-core.o
+ trusty-core-objs		+= trusty.o trusty-mem.o
++trusty-core-objs		+= trusty-smc.o
+ trusty-core-$(CONFIG_ARM)	+= trusty-smc-arm.o
+ trusty-core-$(CONFIG_ARM64)	+= trusty-smc-arm64.o
+ obj-$(CONFIG_TRUSTY_IRQ)	+= trusty-irq.o
+diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h
+new file mode 100644
+index 000000000000..4d73c6ae35d4
+--- /dev/null
++++ b/drivers/trusty/trusty-private.h
+@@ -0,0 +1,61 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2022 ARM Ltd.
++ */
++
++#ifndef _TRUSTY_PRIVATE_H
++#define _TRUSTY_PRIVATE_H
++
++#include <linux/types.h>
++
++struct trusty_work {
++	struct trusty_state *ts;
++	struct work_struct work;
++};
++
++struct trusty_msg_ops {
++	u32 (*send_direct_msg)(struct device *dev, unsigned long fid,
++			       unsigned long a0, unsigned long a1,
++			       unsigned long a2);
++};
++
++struct trusty_mem_ops {
++	int (*trusty_share_memory)(struct device *dev, u64 *id,
++				   struct scatterlist *sglist,
++				   unsigned int nents, pgprot_t pgprot, u64 tag);
++	int (*trusty_lend_memory)(struct device *dev, u64 *id,
++				  struct scatterlist *sglist,
++				  unsigned int nents, pgprot_t pgprot, u64 tag);
++	int (*trusty_reclaim_memory)(struct device *dev, u64 id,
++				     struct scatterlist *sglist,
++				     unsigned int nents);
++};
++
++struct trusty_state {
++	struct mutex smc_lock;
++	struct atomic_notifier_head notifier;
++	struct completion cpu_idle_completion;
++	char *version_str;
++	u32 api_version;
++	bool trusty_panicked;
++	struct device *dev;
++	struct workqueue_struct *nop_wq;
++	struct trusty_work __percpu *nop_works;
++	struct list_head nop_queue;
++	spinlock_t nop_lock; /* protects nop_queue */
++	struct device_dma_parameters dma_parms;
++	const struct trusty_msg_ops *msg_ops;
++	const struct trusty_mem_ops *mem_ops;
++};
++
++int trusty_init_api_version(struct trusty_state *s, struct device *dev,
++			    u32 (*send_direct_msg)(struct device *dev,
++						   unsigned long fid,
++						   unsigned long a0,
++						   unsigned long a1,
++						   unsigned long a2));
++
++int trusty_smc_transport_setup(struct device *dev);
++void trusty_smc_transport_cleanup(struct device *dev);
++
++#endif /* _TRUSTY_PRIVATE_H */
+diff --git a/drivers/trusty/trusty-smc.c b/drivers/trusty/trusty-smc.c
+new file mode 100644
+index 000000000000..8fa841e0e253
+--- /dev/null
++++ b/drivers/trusty/trusty-smc.c
+@@ -0,0 +1,136 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * Copyright (C) 2013 Google, Inc.
++ */
++
++#include <linux/platform_device.h>
++#include <linux/trusty/smcall.h>
++#include <linux/trusty/trusty.h>
++
++#include <linux/scatterlist.h>
++#include <linux/dma-mapping.h>
++
++#include "trusty-smc.h"
++#include "trusty-private.h"
++
++static u32 trusty_smc_send_direct_msg(struct device *dev, unsigned long fid,
++				      unsigned long a0, unsigned long a1,
++				      unsigned long a2)
++{
++	return trusty_smc8(fid, a0, a1, a2, 0, 0, 0, 0).r0;
++}
++
++static int trusty_smc_share_memory(struct device *dev, u64 *id,
++				   struct scatterlist *sglist,
++				   unsigned int nents, pgprot_t pgprot, u64 tag)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	int ret;
++	struct ns_mem_page_info pg_inf;
++	struct scatterlist *sg;
++	size_t count;
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	if (nents != 1) {
++		dev_err(s->dev, "%s: old trusty version does not support "
++			"non-contiguous memory objects\n", __func__);
++		return -EOPNOTSUPP;
++	}
++
++	count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++	if (count != nents) {
++		dev_err(s->dev, "failed to dma map sg_table\n");
++		return -EINVAL;
++	}
++
++	sg = sglist;
++	ret = trusty_encode_page_info(&pg_inf, phys_to_page(sg_dma_address(sg)),
++				      pgprot);
++	if (ret) {
++		dev_err(s->dev, "%s: trusty_encode_page_info failed\n",
++			__func__);
++		dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++		return ret;
++	}
++
++	*id = pg_inf.compat_attr;
++	return 0;
++}
++
++static int trusty_smc_lend_memory(struct device *dev, u64 *id,
++				  struct scatterlist *sglist,
++				  unsigned int nents, pgprot_t pgprot, u64 tag)
++{
++	return -EOPNOTSUPP;
++}
++
++static int trusty_smc_reclaim_memory(struct device *dev, u64 id,
++				     struct scatterlist *sglist,
++				     unsigned int nents)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	if (WARN_ON(s->api_version >= TRUSTY_API_VERSION_MEM_OBJ))
++		return -EINVAL;
++
++	if (nents != 1) {
++		dev_err(s->dev, "%s: not supported\n", __func__);
++		return -EOPNOTSUPP;
++	}
++
++	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++
++	dev_dbg(s->dev, "%s: done\n", __func__);
++	return 0;
++}
++
++static const struct trusty_msg_ops trusty_smc_msg_ops = {
++	.send_direct_msg = &trusty_smc_send_direct_msg,
++};
++
++static const struct trusty_mem_ops trusty_smc_mem_ops = {
++	.trusty_share_memory = &trusty_smc_share_memory,
++	.trusty_lend_memory = &trusty_smc_lend_memory,
++	.trusty_reclaim_memory = &trusty_smc_reclaim_memory,
++};
++
++int trusty_smc_transport_setup(struct device *dev)
++{
++	int rc;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	rc = trusty_init_api_version(s, dev, &trusty_smc_send_direct_msg);
++	if (rc != 0) {
++		return rc;
++	}
++
++	/*
++	 * Initialize Trusty msg calls with Trusty SMC ABI
++	 */
++	s->msg_ops = &trusty_smc_msg_ops;
++
++	/*
++	 * Initialize Trusty memory operations with Trusty SMC ABI only when
++	 * Trusty API version is below TRUSTY_API_VERSION_MEM_OBJ.
++	 */
++	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ)
++		s->mem_ops = &trusty_smc_mem_ops;
++
++	return 0;
++}
++
++void trusty_smc_transport_cleanup(struct device *dev)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (s->msg_ops == &trusty_smc_msg_ops)
++		s->msg_ops = NULL;
++
++	if (s->mem_ops == &trusty_smc_mem_ops)
++		s->mem_ops = NULL;
++}
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 6bd30bc1bbc9..0486827a45ca 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -18,37 +18,10 @@
+ #include <linux/scatterlist.h>
+ #include <linux/dma-mapping.h>
+ 
+-#include "trusty-smc.h"
++#include "trusty-private.h"
+ 
+-struct trusty_state;
+ static struct platform_driver trusty_driver;
+ 
+-struct trusty_work {
+-	struct trusty_state *ts;
+-	struct work_struct work;
+-};
+-
+-struct trusty_state {
+-	struct mutex smc_lock;
+-	struct atomic_notifier_head notifier;
+-	struct completion cpu_idle_completion;
+-	char *version_str;
+-	u32 api_version;
+-	bool trusty_panicked;
+-	struct device *dev;
+-	struct workqueue_struct *nop_wq;
+-	struct trusty_work __percpu *nop_works;
+-	struct list_head nop_queue;
+-	spinlock_t nop_lock; /* protects nop_queue */
+-	struct device_dma_parameters dma_parms;
+-};
+-
+-static inline unsigned long smc(unsigned long r0, unsigned long r1,
+-				unsigned long r2, unsigned long r3)
+-{
+-	return trusty_smc8(r0, r1, r2, r3, 0, 0, 0, 0).r0;
+-}
+-
+ s32 trusty_fast_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
+ {
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+@@ -60,7 +33,7 @@ s32 trusty_fast_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
+ 	if (WARN_ON(SMC_IS_SMC64(smcnr)))
+ 		return SM_ERR_INVALID_PARAMETERS;
+ 
+-	return smc(smcnr, a0, a1, a2);
++	return s->msg_ops->send_direct_msg(dev, smcnr, a0, a1, a2);
+ }
+ EXPORT_SYMBOL(trusty_fast_call32);
+ 
+@@ -76,7 +49,7 @@ s64 trusty_fast_call64(struct device *dev, u64 smcnr, u64 a0, u64 a1, u64 a2)
+ 	if (WARN_ON(!SMC_IS_SMC64(smcnr)))
+ 		return SM_ERR_INVALID_PARAMETERS;
+ 
+-	return smc(smcnr, a0, a1, a2);
++	return s->msg_ops->send_direct_msg(dev, smcnr, a0, a1, a2);
+ }
+ EXPORT_SYMBOL(trusty_fast_call64);
+ #endif
+@@ -88,13 +61,16 @@ static unsigned long trusty_std_call_inner(struct device *dev,
+ {
+ 	unsigned long ret;
+ 	int retry = 5;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+ 
+ 	dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx)\n",
+ 		__func__, smcnr, a0, a1, a2);
+ 	while (true) {
+-		ret = smc(smcnr, a0, a1, a2);
++		ret = s->msg_ops->send_direct_msg(dev, smcnr, a0, a1, a2);
+ 		while ((s32)ret == SM_ERR_FIQ_INTERRUPTED)
+-			ret = smc(SMC_SC_RESTART_FIQ, 0, 0, 0);
++			ret = s->msg_ops->send_direct_msg(dev,
++							  SMC_SC_RESTART_FIQ,
++							  0, 0, 0);
+ 		if ((int)ret != SM_ERR_BUSY || !retry)
+ 			break;
+ 
+@@ -222,58 +198,17 @@ s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2)
+ }
+ EXPORT_SYMBOL(trusty_std_call32);
+ 
+-static int __trusty_share_memory(struct device *dev, u64 *id,
+-				 struct scatterlist *sglist, unsigned int nents,
+-				 pgprot_t pgprot, u64 tag, bool mem_share)
++int trusty_share_memory(struct device *dev, u64 *id,
++			struct scatterlist *sglist, unsigned int nents,
++			pgprot_t pgprot, u64 tag)
+ {
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+-	int ret;
+-	struct ns_mem_page_info pg_inf;
+-	struct scatterlist *sg;
+-	size_t count;
+ 
+ 	if (WARN_ON(dev->driver != &trusty_driver.driver))
+ 		return -EINVAL;
+ 
+-	if (WARN_ON(nents < 1))
+-		return -EINVAL;
+-
+-	if (nents != 1 && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
+-		dev_err(s->dev, "%s: old trusty version does not support non-contiguous memory objects\n",
+-			__func__);
+-		return -EOPNOTSUPP;
+-	}
+-
+-	if (mem_share == false && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
+-		dev_err(s->dev, "%s: old trusty version does not support lending memory objects\n",
+-			__func__);
+-		return -EOPNOTSUPP;
+-	}
+-
+-	count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
+-	if (count != nents) {
+-		dev_err(s->dev, "failed to dma map sg_table\n");
+-		return -EINVAL;
+-	}
+-
+-	sg = sglist;
+-	ret = trusty_encode_page_info(&pg_inf, phys_to_page(sg_dma_address(sg)),
+-				      pgprot);
+-	if (ret) {
+-		dev_err(s->dev, "%s: trusty_encode_page_info failed\n",
+-			__func__);
+-		return ret;
+-	}
+-
+-	*id = pg_inf.compat_attr;
+-	return 0;
+-}
+-
+-int trusty_share_memory(struct device *dev, u64 *id,
+-			struct scatterlist *sglist, unsigned int nents,
+-			pgprot_t pgprot, u64 tag)
+-{
+-	return __trusty_share_memory(dev, id, sglist, nents, pgprot, tag, true);
++	return s->mem_ops->trusty_share_memory(dev, id, sglist, nents, pgprot,
++					       tag);
+ }
+ EXPORT_SYMBOL(trusty_share_memory);
+ 
+@@ -281,7 +216,13 @@ int trusty_lend_memory(struct device *dev, u64 *id,
+ 		       struct scatterlist *sglist, unsigned int nents,
+ 		       pgprot_t pgprot, u64 tag)
+ {
+-	return __trusty_share_memory(dev, id, sglist, nents, pgprot, tag, false);
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	if (WARN_ON(dev->driver != &trusty_driver.driver))
++		return -EINVAL;
++
++	return s->mem_ops->trusty_lend_memory(dev, id, sglist, nents, pgprot,
++					      tag);
+ }
+ EXPORT_SYMBOL(trusty_lend_memory);
+ 
+@@ -316,22 +257,7 @@ int trusty_reclaim_memory(struct device *dev, u64 id,
+ 	if (WARN_ON(dev->driver != &trusty_driver.driver))
+ 		return -EINVAL;
+ 
+-	if (WARN_ON(nents < 1))
+-		return -EINVAL;
+-
+-	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
+-		if (nents != 1) {
+-			dev_err(s->dev, "%s: not supported\n", __func__);
+-			return -EOPNOTSUPP;
+-		}
+-
+-		dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
+-
+-		dev_dbg(s->dev, "%s: done\n", __func__);
+-		return 0;
+-	}
+-
+-	return 0;
++	return s->mem_ops->trusty_reclaim_memory(dev, id, sglist, nents);
+ }
+ EXPORT_SYMBOL(trusty_reclaim_memory);
+ 
+@@ -382,7 +308,7 @@ const char *trusty_version_str_get(struct device *dev)
+ }
+ EXPORT_SYMBOL(trusty_version_str_get);
+ 
+-static void trusty_init_version(struct trusty_state *s, struct device *dev)
++static void trusty_init_version_str(struct trusty_state *s, struct device *dev)
+ {
+ 	int ret;
+ 	int i;
+@@ -430,12 +356,17 @@ bool trusty_get_panic_status(struct device *dev)
+ }
+ EXPORT_SYMBOL(trusty_get_panic_status);
+ 
+-static int trusty_init_api_version(struct trusty_state *s, struct device *dev)
++int trusty_init_api_version(struct trusty_state *s, struct device *dev,
++			    u32 (*send_direct_msg)(struct device *dev,
++						   unsigned long fid,
++						   unsigned long a0,
++						   unsigned long a1,
++						   unsigned long a2))
+ {
+ 	u32 api_version;
+ 
+-	api_version = trusty_fast_call32(dev, SMC_FC_API_VERSION,
+-					 TRUSTY_API_VERSION_CURRENT, 0, 0);
++	api_version = send_direct_msg(dev, SMC_FC_API_VERSION,
++				      TRUSTY_API_VERSION_CURRENT, 0, 0);
+ 	if (api_version == SM_ERR_UNDEFINED_SMC)
+ 		api_version = 0;
+ 
+@@ -598,11 +529,12 @@ static int trusty_probe(struct platform_device *pdev)
+ 
+ 	platform_set_drvdata(pdev, s);
+ 
+-	trusty_init_version(s, &pdev->dev);
++	/* Initialize SMC transport */
++	ret = trusty_smc_transport_setup(s->dev);
++	if (ret != 0 || s->msg_ops == NULL || s->mem_ops == NULL)
++		goto err_transport_setup;
+ 
+-	ret = trusty_init_api_version(s, &pdev->dev);
+-	if (ret < 0)
+-		goto err_api_version;
++	trusty_init_version_str(s, &pdev->dev);
+ 
+ 	s->nop_wq = alloc_workqueue("trusty-nop-wq", WQ_CPU_INTENSIVE, 0);
+ 	if (!s->nop_wq) {
+@@ -648,9 +580,10 @@ static int trusty_probe(struct platform_device *pdev)
+ err_alloc_works:
+ 	destroy_workqueue(s->nop_wq);
+ err_create_nop_wq:
+-err_api_version:
+-	s->dev->dma_parms = NULL;
+ 	kfree(s->version_str);
++        trusty_smc_transport_cleanup(s->dev);
++err_transport_setup:
++	s->dev->dma_parms = NULL;
+ 	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
+ 	mutex_destroy(&s->smc_lock);
+ 	kfree(s);
+@@ -673,6 +606,7 @@ static int trusty_remove(struct platform_device *pdev)
+ 	free_percpu(s->nop_works);
+ 	destroy_workqueue(s->nop_wq);
+ 
++	trusty_smc_transport_cleanup(s->dev);
+ 	mutex_destroy(&s->smc_lock);
+ 	s->dev->dma_parms = NULL;
+ 	kfree(s->version_str);
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0039-ANDROID-trusty-Modify-device-compatible-string.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0039-ANDROID-trusty-Modify-device-compatible-string.patch
new file mode 100644
index 0000000..8fd1c7c
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0039-ANDROID-trusty-Modify-device-compatible-string.patch
@@ -0,0 +1,56 @@
+From 5566c2a41443e26068fe3a8e4a8e4b0c3a4e8ed6 Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 14:22:42 +0000
+Subject: [PATCH 26/32] ANDROID: trusty: Modify device compatible string
+
+Drop smc keyword from device tree node as Trusty can use SMC or FFA
+based transport.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Id99b52f32a2122434a22f1991c0b4cd52b0676ed
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ Documentation/devicetree/bindings/trusty/trusty-irq.txt | 2 +-
+ Documentation/devicetree/bindings/trusty/trusty-smc.txt | 2 +-
+ drivers/trusty/trusty.c                                 | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/Documentation/devicetree/bindings/trusty/trusty-irq.txt b/Documentation/devicetree/bindings/trusty/trusty-irq.txt
+index cbb545ad452b..ae02030be4e7 100644
+--- a/Documentation/devicetree/bindings/trusty/trusty-irq.txt
++++ b/Documentation/devicetree/bindings/trusty/trusty-irq.txt
+@@ -48,7 +48,7 @@ Example:
+ 	};
+ 	...
+ 	trusty {
+-		compatible = "android,trusty-smc-v1";
++		compatible = "android,trusty-v1";
+ 		ranges;
+ 		#address-cells = <2>;
+ 		#size-cells = <2>;
+diff --git a/Documentation/devicetree/bindings/trusty/trusty-smc.txt b/Documentation/devicetree/bindings/trusty/trusty-smc.txt
+index 1b39ad317c67..8d02a31ba814 100644
+--- a/Documentation/devicetree/bindings/trusty/trusty-smc.txt
++++ b/Documentation/devicetree/bindings/trusty/trusty-smc.txt
+@@ -3,4 +3,4 @@ Trusty smc interface
+ Trusty is running in secure mode on the same (arm) cpu(s) as the current os.
+ 
+ Required properties:
+-- compatible: "android,trusty-smc-v1"
++- compatible: "android,trusty-v1"
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 0486827a45ca..757dd7b2c527 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -615,7 +615,7 @@ static int trusty_remove(struct platform_device *pdev)
+ }
+ 
+ static const struct of_device_id trusty_of_match[] = {
+-	{ .compatible = "android,trusty-smc-v1", },
++	{ .compatible = "android,trusty-v1", },
+ 	{},
+ };
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0040-ANDROID-trusty-Add-transport-descriptor.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0040-ANDROID-trusty-Add-transport-descriptor.patch
new file mode 100644
index 0000000..53c76be
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0040-ANDROID-trusty-Add-transport-descriptor.patch
@@ -0,0 +1,209 @@
+From 27248b5c8cb5c1a59b08e46eb3ab918867282c1c Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 17:52:33 +0000
+Subject: [PATCH 27/32] ANDROID: trusty: Add transport descriptor
+
+Use transport descriptor to hold transport specific operations. This
+helps to add new transport to Trusty core.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Ibbde50de0302f6d259a7d572f0910067ce712b37
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/trusty-private.h | 20 +++++++++-
+ drivers/trusty/trusty-smc.c     |  6 +++
+ drivers/trusty/trusty.c         | 71 ++++++++++++++++++++++++++++++---
+ 3 files changed, 90 insertions(+), 7 deletions(-)
+
+diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h
+index 4d73c6ae35d4..74b88bb8f83b 100644
+--- a/drivers/trusty/trusty-private.h
++++ b/drivers/trusty/trusty-private.h
+@@ -14,12 +14,14 @@ struct trusty_work {
+ };
+ 
+ struct trusty_msg_ops {
++	const struct trusty_transport_desc *desc;
+ 	u32 (*send_direct_msg)(struct device *dev, unsigned long fid,
+ 			       unsigned long a0, unsigned long a1,
+ 			       unsigned long a2);
+ };
+ 
+ struct trusty_mem_ops {
++	const struct trusty_transport_desc *desc;
+ 	int (*trusty_share_memory)(struct device *dev, u64 *id,
+ 				   struct scatterlist *sglist,
+ 				   unsigned int nents, pgprot_t pgprot, u64 tag);
+@@ -46,6 +48,19 @@ struct trusty_state {
+ 	struct device_dma_parameters dma_parms;
+ 	const struct trusty_msg_ops *msg_ops;
+ 	const struct trusty_mem_ops *mem_ops;
++	struct trusty_ffa_state *ffa;
++};
++
++struct trusty_ffa_state {
++	struct device *dev; /* ffa device */
++	const struct ffa_dev_ops *ops;
++	struct mutex share_memory_msg_lock; /* protects share_memory_msg */
++};
++
++struct trusty_transport_desc {
++	const char *name;
++	int (*setup)(struct device *dev);
++	void (*cleanup)(struct device *dev);
+ };
+ 
+ int trusty_init_api_version(struct trusty_state *s, struct device *dev,
+@@ -55,7 +70,8 @@ int trusty_init_api_version(struct trusty_state *s, struct device *dev,
+ 						   unsigned long a1,
+ 						   unsigned long a2));
+ 
+-int trusty_smc_transport_setup(struct device *dev);
+-void trusty_smc_transport_cleanup(struct device *dev);
++typedef const struct trusty_transport_desc *trusty_transports_t;
++
++extern const struct trusty_transport_desc trusty_smc_transport;
+ 
+ #endif /* _TRUSTY_PRIVATE_H */
+diff --git a/drivers/trusty/trusty-smc.c b/drivers/trusty/trusty-smc.c
+index 8fa841e0e253..62d1d7060744 100644
+--- a/drivers/trusty/trusty-smc.c
++++ b/drivers/trusty/trusty-smc.c
+@@ -134,3 +134,9 @@ void trusty_smc_transport_cleanup(struct device *dev)
+ 	if (s->mem_ops == &trusty_smc_mem_ops)
+ 		s->mem_ops = NULL;
+ }
++
++const struct trusty_transport_desc trusty_smc_transport = {
++	.name = "smc",
++	.setup = trusty_smc_transport_setup,
++	.cleanup = trusty_smc_transport_cleanup,
++};
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 757dd7b2c527..ec0fccfaa24c 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -493,6 +493,46 @@ void trusty_dequeue_nop(struct device *dev, struct trusty_nop *nop)
+ }
+ EXPORT_SYMBOL(trusty_dequeue_nop);
+ 
++static int
++trusty_transports_setup(const trusty_transports_t *transports,
++			struct device *dev)
++{
++	const struct trusty_transport_desc *transport;
++	int ret;
++	int transports_ret = -ENODEV;
++
++	if (!transports)
++		return -EINVAL;
++
++	for (; (transport = *transports); transports++) {
++		if (!transport->setup)
++			return -EINVAL;
++
++		ret = transport->setup(dev);
++		transports_ret &= ret;
++	}
++
++	/* One transport needs to complete setup without error. */
++	if (transports_ret < 0)
++		return -ENODEV;
++
++	return 0;
++}
++
++static void
++trusty_transports_cleanup(const trusty_transports_t *transports,
++			  struct device *dev)
++{
++	const struct trusty_transport_desc *transport;
++
++	for (; (transport = *transports); transports++) {
++		if (!transport->cleanup)
++			continue;
++
++		transport->cleanup(dev);
++	}
++}
++
+ static int trusty_probe(struct platform_device *pdev)
+ {
+ 	int ret;
+@@ -500,6 +540,7 @@ static int trusty_probe(struct platform_device *pdev)
+ 	work_func_t work_func;
+ 	struct trusty_state *s;
+ 	struct device_node *node = pdev->dev.of_node;
++	const trusty_transports_t *descs;
+ 
+ 	if (!node) {
+ 		dev_err(&pdev->dev, "of_node required\n");
+@@ -529,8 +570,12 @@ static int trusty_probe(struct platform_device *pdev)
+ 
+ 	platform_set_drvdata(pdev, s);
+ 
+-	/* Initialize SMC transport */
+-	ret = trusty_smc_transport_setup(s->dev);
++	/*
++	 * Initialize Trusty transport. Trusty msg and mem ops has to be
++	 * initialized as part of transport setup.
++	 */
++	descs = of_device_get_match_data(&pdev->dev);
++	ret = trusty_transports_setup(descs, s->dev);
+ 	if (ret != 0 || s->msg_ops == NULL || s->mem_ops == NULL)
+ 		goto err_transport_setup;
+ 
+@@ -581,7 +626,7 @@ static int trusty_probe(struct platform_device *pdev)
+ 	destroy_workqueue(s->nop_wq);
+ err_create_nop_wq:
+ 	kfree(s->version_str);
+-        trusty_smc_transport_cleanup(s->dev);
++	trusty_transports_cleanup(descs, s->dev);
+ err_transport_setup:
+ 	s->dev->dma_parms = NULL;
+ 	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
+@@ -595,6 +640,7 @@ static int trusty_remove(struct platform_device *pdev)
+ {
+ 	unsigned int cpu;
+ 	struct trusty_state *s = platform_get_drvdata(pdev);
++	const trusty_transports_t *descs;
+ 
+ 	device_for_each_child(&pdev->dev, NULL, trusty_remove_child);
+ 
+@@ -606,7 +652,10 @@ static int trusty_remove(struct platform_device *pdev)
+ 	free_percpu(s->nop_works);
+ 	destroy_workqueue(s->nop_wq);
+ 
+-	trusty_smc_transport_cleanup(s->dev);
++	/* call transport cleanup */
++	descs = of_device_get_match_data(&pdev->dev);
++	trusty_transports_cleanup(descs, s->dev);
++
+ 	mutex_destroy(&s->smc_lock);
+ 	s->dev->dma_parms = NULL;
+ 	kfree(s->version_str);
+@@ -614,8 +663,20 @@ static int trusty_remove(struct platform_device *pdev)
+ 	return 0;
+ }
+ 
++/*
++ * Trusty probe will try all compiled in transports and will use the transport
++ * supported by the Trusty kernel.
++ *
++ * For Trusty API version < TRUSTY_API_VERSION_MEM_OBJ:
++ *     trusty_smc_transport used for messaging.
++ */
++static const trusty_transports_t trusty_transports[] = {
++	&trusty_smc_transport,
++	NULL,
++};
++
+ static const struct of_device_id trusty_of_match[] = {
+-	{ .compatible = "android,trusty-v1", },
++	{ .compatible = "android,trusty-v1", .data = trusty_transports },
+ 	{},
+ };
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0041-ANDROID-trusty-Add-trusty-ffa-driver.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0041-ANDROID-trusty-Add-trusty-ffa-driver.patch
new file mode 100644
index 0000000..a61d2c8
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0041-ANDROID-trusty-Add-trusty-ffa-driver.patch
@@ -0,0 +1,312 @@
+From 3104eb14f62df1c7c4b9038eb914514b0ff371dc Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Fri, 14 Jan 2022 18:47:08 +0000
+Subject: [PATCH 28/32] ANDROID: trusty: Add trusty-ffa driver
+
+Initial changes related to FFA transport support
+  - Adds FFA transport descriptor
+  - Defines Trusty UUID
+  - Initializes FFA transport does probe, sets ffa_ops
+  - Defers Trusty probe if ARM FF-A driver is not initialized or
+    Trusty SP not found.
+  - Link FF-A device as the supplier for Trusty platform device.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: I78f72b85c20e4bad4c24cf0826e96f27dcf2ee1d
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/Makefile         |   1 +
+ drivers/trusty/trusty-ffa.c     | 196 ++++++++++++++++++++++++++++++++
+ drivers/trusty/trusty-ffa.h     |  28 +++++
+ drivers/trusty/trusty-private.h |   1 +
+ drivers/trusty/trusty.c         |   6 +
+ 5 files changed, 232 insertions(+)
+ create mode 100644 drivers/trusty/trusty-ffa.c
+ create mode 100644 drivers/trusty/trusty-ffa.h
+
+diff --git a/drivers/trusty/Makefile b/drivers/trusty/Makefile
+index fbb53ee93003..797d61bf68ef 100644
+--- a/drivers/trusty/Makefile
++++ b/drivers/trusty/Makefile
+@@ -6,6 +6,7 @@
+ obj-$(CONFIG_TRUSTY)		+= trusty-core.o
+ trusty-core-objs		+= trusty.o trusty-mem.o
+ trusty-core-objs		+= trusty-smc.o
++trusty-core-objs		+= trusty-ffa.o
+ trusty-core-$(CONFIG_ARM)	+= trusty-smc-arm.o
+ trusty-core-$(CONFIG_ARM64)	+= trusty-smc-arm64.o
+ obj-$(CONFIG_TRUSTY_IRQ)	+= trusty-irq.o
+diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c
+new file mode 100644
+index 000000000000..c8c16a1fc700
+--- /dev/null
++++ b/drivers/trusty/trusty-ffa.c
+@@ -0,0 +1,196 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2022 ARM Ltd.
++ */
++
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/trusty/smcall.h>
++#include <linux/arm_ffa.h>
++#include <linux/trusty/trusty.h>
++
++#include <linux/scatterlist.h>
++#include <linux/dma-mapping.h>
++
++#include "trusty-ffa.h"
++#include "trusty-private.h"
++
++static const struct trusty_mem_ops trusty_ffa_mem_ops = {
++	.desc = &trusty_ffa_transport,
++};
++
++static const struct ffa_device_id trusty_ffa_device_id[] = {
++	/*
++	 * Trusty UID: RFC-4122 compliant UUID version 4
++	 * 40ee25f0-a2bc-304c-8c4ca173c57d8af1
++	 */
++	{ UUID_INIT(0x40ee25f0, 0xa2bc, 0x304c,
++		    0x8c, 0x4c, 0xa1, 0x73, 0xc5, 0x7d, 0x8a, 0xf1) },
++	{}
++};
++
++static int trusty_ffa_dev_match(struct device *dev, const void *uuid)
++{
++	struct ffa_device *ffa_dev;
++
++	ffa_dev = to_ffa_dev(dev);
++	if (uuid_equal(&ffa_dev->uuid, uuid))
++		return 1;
++
++	return 0;
++}
++
++static struct ffa_device *trusty_ffa_dev_find(void)
++{
++	const void *data;
++	struct device *dev;
++
++	/* currently only one trusty instance is probed */
++	data = &trusty_ffa_device_id[0].uuid;
++
++	dev = bus_find_device(&ffa_bus_type, NULL, data, trusty_ffa_dev_match);
++	if (dev) {
++		/* drop reference count */
++		put_device(dev);
++		return to_ffa_dev(dev);
++	}
++
++	return NULL;
++}
++
++static int trusty_ffa_link_supplier(struct device *c_dev, struct device *s_dev)
++{
++	if (!c_dev || !s_dev)
++		return -EINVAL;
++
++	if (!device_link_add(c_dev, s_dev, DL_FLAG_AUTOREMOVE_CONSUMER)) {
++		return -ENODEV;
++	}
++
++	return 0;
++}
++
++/*
++ * called from trusty probe
++ */
++static int trusty_ffa_transport_setup(struct device *dev)
++{
++	int rc;
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	struct trusty_ffa_state *ffa_state;
++	struct ffa_device *ffa_dev;
++
++	/* ffa transport not required for lower api versions */
++	if (s->api_version != 0 && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		return -EINVAL;
++	}
++
++	ffa_dev = trusty_ffa_dev_find();
++	if (!ffa_dev) {
++		dev_dbg(dev, "FFA: Trusty device not found defer probe\n");
++		return -EPROBE_DEFER;
++	}
++
++	ffa_state = ffa_dev_get_drvdata(ffa_dev);
++	if (!ffa_state)
++		return -EINVAL;
++
++	rc = trusty_ffa_link_supplier(dev, &ffa_dev->dev);
++	if (rc != 0)
++		return rc;
++
++	/* FFA used only for memory sharing operations */
++	if (s->api_version == TRUSTY_API_VERSION_MEM_OBJ) {
++		s->ffa = ffa_state;
++		s->mem_ops = &trusty_ffa_mem_ops;
++		return 0;
++	}
++
++	return -EINVAL;
++}
++
++static void trusty_ffa_transport_cleanup(struct device *dev)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++
++	/* ffa transport not setup for lower api versions */
++	if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
++		return;
++	}
++
++	s->ffa = NULL;
++	s->mem_ops = NULL;
++}
++
++static int trusty_ffa_probe(struct ffa_device *ffa_dev)
++{
++	const struct ffa_dev_ops *ffa_ops;
++	struct trusty_ffa_state *s;
++	u32 ffa_drv_version;
++
++	ffa_ops = ffa_dev_ops_get(ffa_dev);
++	if (!ffa_ops) {
++		dev_dbg(&ffa_dev->dev, "ffa_dev_ops_get: failed\n");
++		return -ENOENT;
++	}
++
++	/* check ffa driver version compatibility */
++	ffa_drv_version = ffa_ops->api_version_get();
++	if (TO_TRUSTY_FFA_MAJOR(ffa_drv_version) != TRUSTY_FFA_VERSION_MAJOR ||
++	    TO_TRUSTY_FFA_MINOR(ffa_drv_version) < TRUSTY_FFA_VERSION_MINOR)
++		return -EINVAL;
++
++	s = kzalloc(sizeof(*s), GFP_KERNEL);
++	if (!s)
++		return -ENOMEM;
++
++	s->dev = &ffa_dev->dev;
++	s->ops = ffa_ops;
++	mutex_init(&s->share_memory_msg_lock);
++	ffa_dev_set_drvdata(ffa_dev, s);
++
++	ffa_ops->mode_32bit_set(ffa_dev);
++
++	return 0;
++}
++
++static void trusty_ffa_remove(struct ffa_device *ffa_dev)
++{
++	struct trusty_ffa_state *s;
++
++	s = ffa_dev_get_drvdata(ffa_dev);
++
++	mutex_destroy(&s->share_memory_msg_lock);
++	memset(s, 0, sizeof(struct trusty_ffa_state));
++	kfree(s);
++}
++
++static struct ffa_driver trusty_ffa_driver = {
++	.name = "trusty-ffa",
++	.probe = trusty_ffa_probe,
++	.remove = trusty_ffa_remove,
++	.id_table = trusty_ffa_device_id,
++};
++
++static int __init trusty_ffa_transport_init(void)
++{
++	if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)) {
++		return ffa_register(&trusty_ffa_driver);
++	} else
++		return -ENODEV;
++}
++
++static void __exit trusty_ffa_transport_exit(void)
++{
++	if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT))
++		ffa_unregister(&trusty_ffa_driver);
++}
++
++const struct trusty_transport_desc trusty_ffa_transport = {
++	.name = "ffa",
++	.setup = trusty_ffa_transport_setup,
++	.cleanup = trusty_ffa_transport_cleanup,
++};
++
++module_init(trusty_ffa_transport_init);
++module_exit(trusty_ffa_transport_exit);
+diff --git a/drivers/trusty/trusty-ffa.h b/drivers/trusty/trusty-ffa.h
+new file mode 100644
+index 000000000000..267ca2c5db29
+--- /dev/null
++++ b/drivers/trusty/trusty-ffa.h
+@@ -0,0 +1,28 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/*
++ * Copyright (C) 2022 ARM Ltd.
++ */
++
++#ifndef __LINUX_TRUSTY_FFA_H
++#define __LINUX_TRUSTY_FFA_H
++
++#include <linux/types.h>
++#include <linux/uuid.h>
++#include <linux/arm_ffa.h>
++
++#define TRUSTY_FFA_VERSION_MAJOR	(1U)
++#define TRUSTY_FFA_VERSION_MINOR	(0U)
++#define TRUSTY_FFA_VERSION_MAJOR_SHIFT	(16U)
++#define TRUSTY_FFA_VERSION_MAJOR_MASK	(0x7fffU)
++#define TRUSTY_FFA_VERSION_MINOR_SHIFT	(0U)
++#define TRUSTY_FFA_VERSION_MINOR_MASK	(0U)
++
++#define TO_TRUSTY_FFA_MAJOR(v)					\
++	  ((u16)((v >> TRUSTY_FFA_VERSION_MAJOR_SHIFT) &	\
++		 TRUSTY_FFA_VERSION_MAJOR_MASK))
++
++#define TO_TRUSTY_FFA_MINOR(v)					\
++	  ((u16)((v >> TRUSTY_FFA_VERSION_MINOR_SHIFT) &	\
++		 TRUSTY_FFA_VERSION_MINOR_MASK))
++
++#endif /* __LINUX_TRUSTY_FFA_H */
+diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h
+index 74b88bb8f83b..2496f397e5d2 100644
+--- a/drivers/trusty/trusty-private.h
++++ b/drivers/trusty/trusty-private.h
+@@ -73,5 +73,6 @@ int trusty_init_api_version(struct trusty_state *s, struct device *dev,
+ typedef const struct trusty_transport_desc *trusty_transports_t;
+ 
+ extern const struct trusty_transport_desc trusty_smc_transport;
++extern const struct trusty_transport_desc trusty_ffa_transport;
+ 
+ #endif /* _TRUSTY_PRIVATE_H */
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index ec0fccfaa24c..4686b0d34f61 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -509,6 +509,11 @@ trusty_transports_setup(const trusty_transports_t *transports,
+ 			return -EINVAL;
+ 
+ 		ret = transport->setup(dev);
++		if (ret == -EPROBE_DEFER) {
++			dev_notice(dev, "transport %s: defer probe\n",
++				   transport->name);
++			return ret;
++		}
+ 		transports_ret &= ret;
+ 	}
+ 
+@@ -672,6 +677,7 @@ static int trusty_remove(struct platform_device *pdev)
+  */
+ static const trusty_transports_t trusty_transports[] = {
+ 	&trusty_smc_transport,
++	&trusty_ffa_transport,
+ 	NULL,
+ };
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0042-ANDROID-trusty-ffa-Add-support-for-FFA-memory-operat.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0042-ANDROID-trusty-ffa-Add-support-for-FFA-memory-operat.patch
new file mode 100644
index 0000000..2b15009
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0042-ANDROID-trusty-ffa-Add-support-for-FFA-memory-operat.patch
@@ -0,0 +1,151 @@
+From c552f8ed6bbd68e838732598ca74055bb696dcb3 Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Tue, 18 Jan 2022 15:11:46 +0000
+Subject: [PATCH 29/32] ANDROID: trusty-ffa: Add support for FFA memory
+ operations
+
+Initializes Trusty mem_ops with FFA memory operations for share,
+lend, reclaim.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Id3a1eb5ae8e4721cb983c624773d39bafe25a77d
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/trusty-ffa.c | 102 ++++++++++++++++++++++++++++++++++++
+ drivers/trusty/trusty.c     |   5 ++
+ 2 files changed, 107 insertions(+)
+
+diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c
+index c8c16a1fc700..0655b3887b52 100644
+--- a/drivers/trusty/trusty-ffa.c
++++ b/drivers/trusty/trusty-ffa.c
+@@ -15,8 +15,110 @@
+ #include "trusty-ffa.h"
+ #include "trusty-private.h"
+ 
++static int __trusty_ffa_share_memory(struct device *dev, u64 *id,
++				     struct scatterlist *sglist,
++				     unsigned int nents, pgprot_t pgprot,
++				     u64 tag, bool share)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	int ret;
++	struct scatterlist *sg;
++	size_t count;
++	struct ffa_device *ffa_dev = to_ffa_dev(s->ffa->dev);
++	const struct ffa_dev_ops *ffa_ops = s->ffa->ops;
++	struct ffa_mem_region_attributes ffa_mem_attr;
++	struct ffa_mem_ops_args ffa_mem_args;
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++	if (count != nents) {
++		dev_err(s->dev, "failed to dma map sg_table\n");
++		return -EINVAL;
++	}
++
++	sg = sglist;
++
++	mutex_lock(&s->ffa->share_memory_msg_lock);
++
++	ffa_mem_attr.receiver = ffa_dev->vm_id;
++	ffa_mem_attr.attrs = FFA_MEM_RW;
++
++	ffa_mem_args.use_txbuf = 1;
++	ffa_mem_args.tag = tag;
++	ffa_mem_args.attrs = &ffa_mem_attr;
++	ffa_mem_args.nattrs = 1;
++	ffa_mem_args.sg = sg;
++	ffa_mem_args.flags = 0;
++
++	if (share) {
++		ret = ffa_ops->memory_share(ffa_dev, &ffa_mem_args);
++	} else {
++		ret = ffa_ops->memory_lend(ffa_dev, &ffa_mem_args);
++	}
++
++	mutex_unlock(&s->ffa->share_memory_msg_lock);
++
++	if (!ret) {
++		*id = ffa_mem_args.g_handle;
++		dev_dbg(s->dev, "%s: done\n", __func__);
++		return 0;
++	}
++
++	dev_err(s->dev, "%s: failed %d", __func__, ret);
++
++	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++	return ret;
++}
++
++static int trusty_ffa_share_memory(struct device *dev, u64 *id,
++				   struct scatterlist *sglist,
++				   unsigned int nents, pgprot_t pgprot, u64 tag)
++{
++	return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag,
++					 true);
++}
++
++static int trusty_ffa_lend_memory(struct device *dev, u64 *id,
++				  struct scatterlist *sglist,
++				  unsigned int nents, pgprot_t pgprot, u64 tag)
++{
++	return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag,
++					 false);
++}
++
++static int trusty_ffa_reclaim_memory(struct device *dev, u64 id,
++				     struct scatterlist *sglist,
++				     unsigned int nents)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	int ret = 0;
++	const struct ffa_dev_ops *ffa_ops = s->ffa->ops;
++
++	if (WARN_ON(nents < 1))
++		return -EINVAL;
++
++	mutex_lock(&s->ffa->share_memory_msg_lock);
++
++	ret = ffa_ops->memory_reclaim(id, 0);
++
++	mutex_unlock(&s->ffa->share_memory_msg_lock);
++
++	if (ret != 0)
++		return ret;
++
++	dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL);
++
++	dev_dbg(s->dev, "%s: done\n", __func__);
++	return 0;
++}
++
+ static const struct trusty_mem_ops trusty_ffa_mem_ops = {
+ 	.desc = &trusty_ffa_transport,
++	.trusty_share_memory = &trusty_ffa_share_memory,
++	.trusty_lend_memory = &trusty_ffa_lend_memory,
++	.trusty_reclaim_memory = &trusty_ffa_reclaim_memory,
+ };
+ 
+ static const struct ffa_device_id trusty_ffa_device_id[] = {
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 4686b0d34f61..f91c255c9897 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -674,6 +674,11 @@ static int trusty_remove(struct platform_device *pdev)
+  *
+  * For Trusty API version < TRUSTY_API_VERSION_MEM_OBJ:
+  *     trusty_smc_transport used for messaging.
++ *
++ * For Trusty API version == TRUSTY_API_VERSION_MEM_OBJ:
++ *     trusty_smc_transport used for messaging.
++ *     trusty_ffa_transport used for memory sharing.
++ *
+  */
+ static const trusty_transports_t trusty_transports[] = {
+ 	&trusty_smc_transport,
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0043-ANDROID-trusty-ffa-Enable-FFA-transport-for-both-mem.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0043-ANDROID-trusty-ffa-Enable-FFA-transport-for-both-mem.patch
new file mode 100644
index 0000000..2c1623a
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0043-ANDROID-trusty-ffa-Enable-FFA-transport-for-both-mem.patch
@@ -0,0 +1,142 @@
+From e67cd78142984c7c4120f15ef14e1e026746af5a Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Thu, 3 Feb 2022 11:19:38 +0000
+Subject: [PATCH 30/32] ANDROID: trusty-ffa: Enable FFA transport for both
+ memory and message ops
+
+Adds new API version TRUSTY_API_VERSION_FFA and sets this as current
+API version.
+
+If Trusty on the secure side supports receipt of FFA direct request,
+then trusty core uses FFA calls for messages and memory operations.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: I4a8b060f906a96935a7df10713026fb543e2b9a7
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/trusty-ffa.c   | 58 +++++++++++++++++++++++++++++++++++
+ drivers/trusty/trusty.c       |  3 ++
+ include/linux/trusty/smcall.h |  3 +-
+ 3 files changed, 63 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c
+index 0655b3887b52..543f5a0d31cb 100644
+--- a/drivers/trusty/trusty-ffa.c
++++ b/drivers/trusty/trusty-ffa.c
+@@ -15,6 +15,36 @@
+ #include "trusty-ffa.h"
+ #include "trusty-private.h"
+ 
++/* partition property: Supports receipt of direct requests */
++#define FFA_PARTITION_DIRECT_REQ_RECV	BIT(0)
++
++/* string representation of trusty UUID used for partition info get call */
++static const char *trusty_uuid = "40ee25f0-a2bc-304c-8c4c-a173c57d8af1";
++
++static u32 trusty_ffa_send_direct_msg(struct device *dev, unsigned long fid,
++				      unsigned long a0, unsigned long a1,
++				      unsigned long a2)
++{
++	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
++	struct ffa_send_direct_data ffa_msg;
++	struct ffa_device *ffa_dev;
++	int ret;
++
++	ffa_dev = to_ffa_dev(s->ffa->dev);
++
++	ffa_msg.data0 = fid;
++	ffa_msg.data1 = a0;
++	ffa_msg.data2 = a1;
++	ffa_msg.data3 = a2;
++	ffa_msg.data4 = 0;
++
++	ret = s->ffa->ops->sync_send_receive(ffa_dev, &ffa_msg);
++	if (!ret)
++		return ffa_msg.data0;
++
++	return ret;
++}
++
+ static int __trusty_ffa_share_memory(struct device *dev, u64 *id,
+ 				     struct scatterlist *sglist,
+ 				     unsigned int nents, pgprot_t pgprot,
+@@ -114,6 +144,11 @@ static int trusty_ffa_reclaim_memory(struct device *dev, u64 id,
+ 	return 0;
+ }
+ 
++static const struct trusty_msg_ops trusty_ffa_msg_ops = {
++	.desc = &trusty_ffa_transport,
++	.send_direct_msg = &trusty_ffa_send_direct_msg,
++};
++
+ static const struct trusty_mem_ops trusty_ffa_mem_ops = {
+ 	.desc = &trusty_ffa_transport,
+ 	.trusty_share_memory = &trusty_ffa_share_memory,
+@@ -181,6 +216,7 @@ static int trusty_ffa_transport_setup(struct device *dev)
+ 	struct trusty_state *s = platform_get_drvdata(to_platform_device(dev));
+ 	struct trusty_ffa_state *ffa_state;
+ 	struct ffa_device *ffa_dev;
++	struct ffa_partition_info pinfo = { 0 };
+ 
+ 	/* ffa transport not required for lower api versions */
+ 	if (s->api_version != 0 && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) {
+@@ -208,6 +244,28 @@ static int trusty_ffa_transport_setup(struct device *dev)
+ 		return 0;
+ 	}
+ 
++	/* check if Trusty partition can support receipt of direct requests. */
++	rc = ffa_state->ops->partition_info_get(trusty_uuid, &pinfo);
++	if (rc || !(pinfo.properties & FFA_PARTITION_DIRECT_REQ_RECV)) {
++		dev_err(ffa_state->dev, "trusty_ffa_pinfo: ret: 0x%x, prop: 0x%x\n",
++			rc, pinfo.properties);
++		return -EINVAL;
++	}
++
++	/* query and check Trusty API version */
++	s->ffa = ffa_state;
++	rc = trusty_init_api_version(s, dev, trusty_ffa_send_direct_msg);
++	if (rc) {
++		s->ffa = NULL;
++		return -EINVAL;
++	}
++
++	if (s->api_version == TRUSTY_API_VERSION_FFA) {
++		s->msg_ops = &trusty_ffa_msg_ops;
++		s->mem_ops = &trusty_ffa_mem_ops;
++		return 0;
++	}
++
+ 	return -EINVAL;
+ }
+ 
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index f91c255c9897..66273873f169 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -679,6 +679,9 @@ static int trusty_remove(struct platform_device *pdev)
+  *     trusty_smc_transport used for messaging.
+  *     trusty_ffa_transport used for memory sharing.
+  *
++ * For Trusty API version > TRUSTY_API_VERSION_MEM_OBJ:
++ *     trusty_ffa_transport used for messaging and memory sharing operations.
++ *
+  */
+ static const trusty_transports_t trusty_transports[] = {
+ 	&trusty_smc_transport,
+diff --git a/include/linux/trusty/smcall.h b/include/linux/trusty/smcall.h
+index aea3f6068593..17b3d1c2c4f6 100644
+--- a/include/linux/trusty/smcall.h
++++ b/include/linux/trusty/smcall.h
+@@ -109,7 +109,8 @@
+ #define TRUSTY_API_VERSION_SMP_NOP	(3)
+ #define TRUSTY_API_VERSION_PHYS_MEM_OBJ	(4)
+ #define TRUSTY_API_VERSION_MEM_OBJ	(5)
+-#define TRUSTY_API_VERSION_CURRENT	(5)
++#define TRUSTY_API_VERSION_FFA		(6)
++#define TRUSTY_API_VERSION_CURRENT	(6)
+ #define SMC_FC_API_VERSION	SMC_FASTCALL_NR(SMC_ENTITY_SECURE_MONITOR, 11)
+ 
+ /* TRUSTED_OS entity calls */
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0044-ANDROID-trusty-Make-trusty-transports-configurable.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0044-ANDROID-trusty-Make-trusty-transports-configurable.patch
new file mode 100644
index 0000000..3076eca
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/0044-ANDROID-trusty-Make-trusty-transports-configurable.patch
@@ -0,0 +1,146 @@
+From 088162ab1852aa0f2034199e97a327b6240231db Mon Sep 17 00:00:00 2001
+From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Date: Wed, 16 Mar 2022 11:14:09 +0000
+Subject: [PATCH 31/32] ANDROID: trusty: Make trusty transports configurable
+
+With TRUSTY_SMC_TRANSPORT set to 'y', SMC based message passing and
+memory sharing support will be compiled in to trusty core.
+
+With TRUSTY_FFA_TRANSPORT set to 'y', FFA based message passing and
+memory sharing support will be compiled in to trusty core. This
+depends on ARM FF-A driver (ARM_FFA_TRANSPORT).
+
+Enabling any of the transport sets config TRUSTY_HAVE_TRANSPORT to 'y'.
+Not enabling any of the transport causes the build to break.
+
+Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
+Change-Id: Ib5bbf0d39202e6897700264d14371ae33101c1d1
+Upstream-Status: Pending [Not submitted to upstream yet]
+---
+ drivers/trusty/Kconfig          | 30 ++++++++++++++++++++++++++++++
+ drivers/trusty/Makefile         | 26 +++++++++++++++-----------
+ drivers/trusty/trusty-private.h |  4 ++++
+ drivers/trusty/trusty.c         |  7 +++++++
+ 4 files changed, 56 insertions(+), 11 deletions(-)
+
+diff --git a/drivers/trusty/Kconfig b/drivers/trusty/Kconfig
+index fcde7f097acf..260022e4595b 100644
+--- a/drivers/trusty/Kconfig
++++ b/drivers/trusty/Kconfig
+@@ -21,6 +21,36 @@ config TRUSTY
+ 
+ if TRUSTY
+ 
++config TRUSTY_HAVE_TRANSPORT
++	bool
++	help
++	  If any of the Trusty transport is enabled then it sets this config
++	  option. This variable is used to break the build when none of the
++	  Trusty transports are enabled.
++
++config TRUSTY_SMC_TRANSPORT
++	bool "Trusty transport based on SMC"
++	select TRUSTY_HAVE_TRANSPORT
++	default n
++	help
++	  Enable SMC based transport for Trusty. This transport is required for
++	  Trusty API version <= TRUSTY_API_VERSION_MEM_OBJ.
++
++	  If you want to use legacy SMC based transport for sending Trusty
++	  messages to secure world, answer Y.
++
++config TRUSTY_FFA_TRANSPORT
++	bool "Trusty transport based on FFA"
++	select TRUSTY_HAVE_TRANSPORT
++	depends on ARM_FFA_TRANSPORT
++	default y
++	help
++	  Enable ARM FF-A based transport for Trusty. This transport is required
++	  for Trusty API version >= TRUSTY_API_VERSION_MEM_OBJ.
++
++	  If you want to use ARM FF-A based transport for sending Trusty messages
++	  to secure world, answer Y.
++
+ config TRUSTY_IRQ
+ 	tristate "Trusty IRQ support"
+ 	default y
+diff --git a/drivers/trusty/Makefile b/drivers/trusty/Makefile
+index 797d61bf68ef..104a4d0ed35c 100644
+--- a/drivers/trusty/Makefile
++++ b/drivers/trusty/Makefile
+@@ -3,14 +3,18 @@
+ # Makefile for trusty components
+ #
+ 
+-obj-$(CONFIG_TRUSTY)		+= trusty-core.o
+-trusty-core-objs		+= trusty.o trusty-mem.o
+-trusty-core-objs		+= trusty-smc.o
+-trusty-core-objs		+= trusty-ffa.o
+-trusty-core-$(CONFIG_ARM)	+= trusty-smc-arm.o
+-trusty-core-$(CONFIG_ARM64)	+= trusty-smc-arm64.o
+-obj-$(CONFIG_TRUSTY_IRQ)	+= trusty-irq.o
+-obj-$(CONFIG_TRUSTY_LOG)	+= trusty-log.o
+-obj-$(CONFIG_TRUSTY_TEST)	+= trusty-test.o
+-obj-$(CONFIG_TRUSTY_VIRTIO)	+= trusty-virtio.o
+-obj-$(CONFIG_TRUSTY_VIRTIO_IPC)	+= trusty-ipc.o
++obj-$(CONFIG_TRUSTY)				+= trusty-core.o
++trusty-core-objs				+= trusty.o
++trusty-arm-smc-$(CONFIG_ARM)			+= trusty-smc-arm.o
++trusty-arm-smc64-$(CONFIG_ARM64)		+= trusty-smc-arm64.o
++trusty-transport-$(CONFIG_TRUSTY_SMC_TRANSPORT) += trusty-smc.o
++trusty-transport-$(CONFIG_TRUSTY_SMC_TRANSPORT) += trusty-mem.o
++trusty-transport-$(CONFIG_TRUSTY_SMC_TRANSPORT) += $(trusty-arm-smc-y)
++trusty-transport-$(CONFIG_TRUSTY_SMC_TRANSPORT) += $(trusty-arm-smc64-y)
++trusty-transport-$(CONFIG_TRUSTY_FFA_TRANSPORT) += trusty-ffa.o
++trusty-core-objs				+= $(trusty-transport-y)
++obj-$(CONFIG_TRUSTY_IRQ)			+= trusty-irq.o
++obj-$(CONFIG_TRUSTY_LOG)			+= trusty-log.o
++obj-$(CONFIG_TRUSTY_TEST)			+= trusty-test.o
++obj-$(CONFIG_TRUSTY_VIRTIO)			+= trusty-virtio.o
++obj-$(CONFIG_TRUSTY_VIRTIO_IPC)			+= trusty-ipc.o
+diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h
+index 2496f397e5d2..386ca9ae5af3 100644
+--- a/drivers/trusty/trusty-private.h
++++ b/drivers/trusty/trusty-private.h
+@@ -72,7 +72,11 @@ int trusty_init_api_version(struct trusty_state *s, struct device *dev,
+ 
+ typedef const struct trusty_transport_desc *trusty_transports_t;
+ 
++#ifdef CONFIG_TRUSTY_SMC_TRANSPORT
+ extern const struct trusty_transport_desc trusty_smc_transport;
++#endif
++#ifdef CONFIG_TRUSTY_FFA_TRANSPORT
+ extern const struct trusty_transport_desc trusty_ffa_transport;
++#endif
+ 
+ #endif /* _TRUSTY_PRIVATE_H */
+diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c
+index 66273873f169..06698f3c67f9 100644
+--- a/drivers/trusty/trusty.c
++++ b/drivers/trusty/trusty.c
+@@ -684,8 +684,12 @@ static int trusty_remove(struct platform_device *pdev)
+  *
+  */
+ static const trusty_transports_t trusty_transports[] = {
++#ifdef CONFIG_TRUSTY_SMC_TRANSPORT
+ 	&trusty_smc_transport,
++#endif
++#ifdef CONFIG_TRUSTY_FFA_TRANSPORT
+ 	&trusty_ffa_transport,
++#endif
+ 	NULL,
+ };
+ 
+@@ -708,6 +712,9 @@ static struct platform_driver trusty_driver = {
+ 
+ static int __init trusty_driver_init(void)
+ {
++	BUILD_BUG_ON_MSG(!IS_ENABLED(CONFIG_TRUSTY_HAVE_TRANSPORT),
++			 "Trusty transport not configured");
++
+ 	return platform_driver_register(&trusty_driver);
+ }
+ 
+-- 
+2.30.2
+
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/gki_defconfig b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/gki_defconfig
new file mode 100644
index 0000000..30bd964
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.10/tc/gki_defconfig
@@ -0,0 +1,689 @@
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_PSI=y
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_FAST_NO_HZ=y
+CONFIG_RCU_NOCB_CPU=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_IKHEADERS=y
+CONFIG_UCLAMP_TASK=y
+CONFIG_UCLAMP_BUCKETS_COUNT=20
+CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_BLK_CGROUP=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_UCLAMP_TASK_GROUP=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_BPF=y
+CONFIG_NAMESPACES=y
+# CONFIG_PID_NS is not set
+CONFIG_RT_SOFTINT_OPTIMIZATION=y
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_XZ is not set
+# CONFIG_RD_LZO is not set
+CONFIG_BOOT_CONFIG=y
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_FHANDLE is not set
+CONFIG_KALLSYMS_ALL=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT_ALWAYS_ON=y
+CONFIG_USERFAULTFD=y
+# CONFIG_RSEQ is not set
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLAB_MERGE_DEFAULT is not set
+CONFIG_SLAB_FREELIST_RANDOM=y
+CONFIG_SLAB_FREELIST_HARDENED=y
+CONFIG_SHUFFLE_PAGE_ALLOCATOR=y
+CONFIG_PROFILING=y
+# CONFIG_ZONE_DMA is not set
+CONFIG_ARCH_SUNXI=y
+CONFIG_ARCH_HISI=y
+CONFIG_ARCH_QCOM=y
+CONFIG_ARCH_SPRD=y
+CONFIG_SCHED_MC=y
+CONFIG_NR_CPUS=32
+CONFIG_PARAVIRT=y
+CONFIG_ARM64_SW_TTBR0_PAN=y
+CONFIG_COMPAT=y
+CONFIG_ARMV8_DEPRECATED=y
+CONFIG_SWP_EMULATION=y
+CONFIG_CP15_BARRIER_EMULATION=y
+CONFIG_SETEND_EMULATION=y
+CONFIG_RANDOMIZE_BASE=y
+# CONFIG_RANDOMIZE_MODULE_REGION_FULL is not set
+CONFIG_CMDLINE="stack_depot_disable=on kasan.stacktrace=off kvm-arm.mode=protected cgroup_disable=pressure cgroup.memory=nokmem"
+CONFIG_CMDLINE_EXTEND=y
+# CONFIG_DMI is not set
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+# CONFIG_PM_WAKELOCKS_GC is not set
+CONFIG_ENERGY_MODEL=y
+CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_MENU=y
+CONFIG_CPU_IDLE_GOV_TEO=y
+CONFIG_ARM_CPUIDLE=y
+CONFIG_ARM_PSCI_CPUIDLE=y
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_STAT=y
+CONFIG_CPU_FREQ_TIMES=y
+CONFIG_CPU_FREQ_GOV_POWERSAVE=y
+CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
+CONFIG_ARM_SCPI_CPUFREQ=y
+CONFIG_ARM_SCMI_CPUFREQ=y
+CONFIG_ARM_SCMI_PROTOCOL=y
+# CONFIG_ARM_SCMI_POWER_DOMAIN is not set
+CONFIG_ARM_SCPI_PROTOCOL=y
+# CONFIG_ARM_SCPI_POWER_DOMAIN is not set
+# CONFIG_EFI_ARMSTUB_DTB_LOADER is not set
+CONFIG_VIRTUALIZATION=y
+CONFIG_KVM=y
+CONFIG_CRYPTO_SHA2_ARM64_CE=y
+CONFIG_CRYPTO_AES_ARM64_CE_BLK=y
+CONFIG_KPROBES=y
+CONFIG_JUMP_LABEL=y
+CONFIG_SHADOW_CALL_STACK=y
+CONFIG_LTO_CLANG_FULL=y
+CONFIG_CFI_CLANG=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODVERSIONS=y
+CONFIG_MODULE_SCMVERSION=y
+CONFIG_BLK_CGROUP_IOCOST=y
+CONFIG_BLK_INLINE_ENCRYPTION=y
+CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK=y
+CONFIG_IOSCHED_BFQ=y
+CONFIG_BFQ_GROUP_IOSCHED=y
+CONFIG_GKI_HACKS_TO_FIX=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_BINFMT_MISC=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
+CONFIG_TRANSPARENT_HUGEPAGE=y
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_CLEANCACHE=y
+CONFIG_CMA=y
+CONFIG_CMA_DEBUGFS=y
+CONFIG_CMA_SYSFS=y
+CONFIG_CMA_AREAS=16
+CONFIG_READ_ONLY_THP_FOR_FS=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_XFRM_INTERFACE=y
+CONFIG_XFRM_MIGRATE=y
+CONFIG_XFRM_STATISTICS=y
+CONFIG_NET_KEY=y
+CONFIG_XDP_SOCKETS=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_NET_IPIP=y
+CONFIG_NET_IPGRE_DEMUX=y
+CONFIG_NET_IPGRE=y
+CONFIG_NET_IPVTI=y
+CONFIG_INET_ESP=y
+CONFIG_INET_UDP_DIAG=y
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_VTI=y
+CONFIG_IPV6_GRE=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_DSCP=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_NOTRACK=y
+CONFIG_NETFILTER_XT_TARGET_TEE=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_MATCH_BPF=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_DSCP=y
+CONFIG_NETFILTER_XT_MATCH_ESP=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_MULTIPORT=y
+CONFIG_NETFILTER_XT_MATCH_OWNER=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2_LOG=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_IP_NF_NAT=y
+CONFIG_IP_NF_TARGET_MASQUERADE=y
+CONFIG_IP_NF_TARGET_NETMAP=y
+CONFIG_IP_NF_TARGET_REDIRECT=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_MATCH_RPFILTER=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_TIPC=y
+CONFIG_L2TP=y
+CONFIG_BRIDGE=y
+CONFIG_6LOWPAN=y
+CONFIG_IEEE802154=y
+CONFIG_IEEE802154_6LOWPAN=y
+CONFIG_MAC802154=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NET_SCH_PRIO=y
+CONFIG_NET_SCH_MULTIQ=y
+CONFIG_NET_SCH_SFQ=y
+CONFIG_NET_SCH_TBF=y
+CONFIG_NET_SCH_NETEM=y
+CONFIG_NET_SCH_CODEL=y
+CONFIG_NET_SCH_FQ_CODEL=y
+CONFIG_NET_SCH_FQ=y
+CONFIG_NET_SCH_INGRESS=y
+CONFIG_NET_CLS_BASIC=y
+CONFIG_NET_CLS_TCINDEX=y
+CONFIG_NET_CLS_FW=y
+CONFIG_NET_CLS_U32=y
+CONFIG_CLS_U32_MARK=y
+CONFIG_NET_CLS_FLOW=y
+CONFIG_NET_CLS_BPF=y
+CONFIG_NET_CLS_MATCHALL=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_CMP=y
+CONFIG_NET_EMATCH_NBYTE=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_EMATCH_META=y
+CONFIG_NET_EMATCH_TEXT=y
+CONFIG_NET_CLS_ACT=y
+CONFIG_NET_ACT_POLICE=y
+CONFIG_NET_ACT_GACT=y
+CONFIG_NET_ACT_MIRRED=y
+CONFIG_NET_ACT_SKBEDIT=y
+CONFIG_VSOCKETS=y
+CONFIG_CGROUP_NET_PRIO=y
+CONFIG_BPF_JIT=y
+CONFIG_CAN=y
+CONFIG_BT=y
+CONFIG_BT_RFCOMM=y
+CONFIG_BT_RFCOMM_TTY=y
+CONFIG_BT_HIDP=y
+CONFIG_BT_HCIBTSDIO=y
+CONFIG_BT_HCIUART=y
+CONFIG_BT_HCIUART_LL=y
+CONFIG_BT_HCIUART_BCM=y
+CONFIG_BT_HCIUART_QCA=y
+CONFIG_RFKILL=y
+CONFIG_NFC=y
+CONFIG_PCI=y
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCIEAER=y
+CONFIG_PCI_IOV=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_PCIE_DW_PLAT_EP=y
+CONFIG_PCIE_QCOM=y
+CONFIG_PCIE_KIRIN=y
+CONFIG_PCI_ENDPOINT=y
+CONFIG_FW_LOADER_USER_HELPER=y
+# CONFIG_FW_CACHE is not set
+# CONFIG_SUN50I_DE2_BUS is not set
+# CONFIG_SUNXI_RSB is not set
+CONFIG_GNSS=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_LOOP_MIN_COUNT=16
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_SRAM=y
+CONFIG_UID_SYS_STATS=y
+CONFIG_SCSI=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+CONFIG_SCSI_UFSHCD=y
+CONFIG_SCSI_UFSHCD_PCI=y
+CONFIG_SCSI_UFSHCD_PLATFORM=y
+CONFIG_SCSI_UFS_DWC_TC_PLATFORM=y
+CONFIG_SCSI_UFS_HISI=y
+CONFIG_SCSI_UFS_BSG=y
+CONFIG_SCSI_UFS_CRYPTO=y
+CONFIG_SCSI_UFS_HPB=y
+CONFIG_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_DEFAULT_KEY=y
+CONFIG_DM_SNAPSHOT=y
+CONFIG_DM_UEVENT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_DM_BOW=y
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+CONFIG_WIREGUARD=y
+CONFIG_IFB=y
+CONFIG_TUN=y
+CONFIG_VETH=y
+CONFIG_PPP=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PPTP=y
+CONFIG_PPPOL2TP=y
+CONFIG_USB_RTL8150=y
+CONFIG_USB_RTL8152=y
+CONFIG_USB_USBNET=y
+# CONFIG_USB_NET_AX8817X is not set
+# CONFIG_USB_NET_AX88179_178A is not set
+CONFIG_USB_NET_CDC_EEM=y
+# CONFIG_USB_NET_NET1080 is not set
+# CONFIG_USB_NET_CDC_SUBSET is not set
+# CONFIG_USB_NET_ZAURUS is not set
+CONFIG_USB_NET_AQC111=y
+# CONFIG_WLAN_VENDOR_ADMTEK is not set
+# CONFIG_WLAN_VENDOR_ATH is not set
+# CONFIG_WLAN_VENDOR_ATMEL is not set
+# CONFIG_WLAN_VENDOR_BROADCOM is not set
+# CONFIG_WLAN_VENDOR_CISCO is not set
+# CONFIG_WLAN_VENDOR_INTEL is not set
+# CONFIG_WLAN_VENDOR_INTERSIL is not set
+# CONFIG_WLAN_VENDOR_MARVELL is not set
+# CONFIG_WLAN_VENDOR_MEDIATEK is not set
+# CONFIG_WLAN_VENDOR_RALINK is not set
+# CONFIG_WLAN_VENDOR_REALTEK is not set
+# CONFIG_WLAN_VENDOR_RSI is not set
+# CONFIG_WLAN_VENDOR_ST is not set
+# CONFIG_WLAN_VENDOR_TI is not set
+# CONFIG_WLAN_VENDOR_ZYDAS is not set
+# CONFIG_WLAN_VENDOR_QUANTENNA is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
+# CONFIG_MOUSE_PS2 is not set
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_JOYSTICK_XPAD=y
+CONFIG_JOYSTICK_XPAD_FF=y
+CONFIG_JOYSTICK_XPAD_LEDS=y
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_UINPUT=y
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+# CONFIG_SERIAL_8250_EXAR is not set
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SERIAL_SAMSUNG=y
+CONFIG_SERIAL_SAMSUNG_CONSOLE=y
+CONFIG_SERIAL_MSM_GENI_EARLY_CONSOLE=y
+CONFIG_SERIAL_SPRD=y
+CONFIG_SERIAL_SPRD_CONSOLE=y
+CONFIG_HVC_DCC=y
+CONFIG_HVC_DCC_SERIALIZE_SMP=y
+CONFIG_SERIAL_DEV_BUS=y
+CONFIG_HW_RANDOM=y
+# CONFIG_HW_RANDOM_CAVIUM is not set
+# CONFIG_DEVMEM is not set
+# CONFIG_DEVPORT is not set
+# CONFIG_I2C_COMPAT is not set
+# CONFIG_I2C_HELPER_AUTO is not set
+CONFIG_I3C=y
+CONFIG_SPI=y
+CONFIG_SPMI=y
+# CONFIG_SPMI_MSM_PMIC_ARB is not set
+# CONFIG_PINCTRL_SUN8I_H3_R is not set
+# CONFIG_PINCTRL_SUN50I_A64 is not set
+# CONFIG_PINCTRL_SUN50I_A64_R is not set
+# CONFIG_PINCTRL_SUN50I_H5 is not set
+# CONFIG_PINCTRL_SUN50I_H6 is not set
+# CONFIG_PINCTRL_SUN50I_H6_R is not set
+CONFIG_GPIO_GENERIC_PLATFORM=y
+CONFIG_POWER_RESET_HISI=y
+# CONFIG_HWMON is not set
+CONFIG_THERMAL=y
+CONFIG_THERMAL_NETLINK=y
+CONFIG_THERMAL_STATISTICS=y
+CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=100
+CONFIG_THERMAL_WRITABLE_TRIPS=y
+CONFIG_THERMAL_GOV_USER_SPACE=y
+CONFIG_THERMAL_GOV_POWER_ALLOCATOR=y
+CONFIG_CPU_THERMAL=y
+CONFIG_DEVFREQ_THERMAL=y
+CONFIG_THERMAL_EMULATION=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_MFD_ACT8945A=y
+CONFIG_MFD_SYSCON=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_RC_CORE=y
+# CONFIG_RC_MAP is not set
+CONFIG_LIRC=y
+CONFIG_BPF_LIRC_MODE2=y
+CONFIG_RC_DECODERS=y
+CONFIG_RC_DEVICES=y
+CONFIG_MEDIA_CEC_RC=y
+# CONFIG_MEDIA_ANALOG_TV_SUPPORT is not set
+# CONFIG_MEDIA_DIGITAL_TV_SUPPORT is not set
+# CONFIG_MEDIA_RADIO_SUPPORT is not set
+# CONFIG_MEDIA_SDR_SUPPORT is not set
+# CONFIG_MEDIA_TEST_SUPPORT is not set
+CONFIG_VIDEO_V4L2_SUBDEV_API=y
+CONFIG_MEDIA_USB_SUPPORT=y
+CONFIG_USB_VIDEO_CLASS=y
+CONFIG_USB_GSPCA=y
+CONFIG_V4L_PLATFORM_DRIVERS=y
+CONFIG_V4L_MEM2MEM_DRIVERS=y
+# CONFIG_VGA_ARB is not set
+CONFIG_DRM=y
+# CONFIG_DRM_FBDEV_EMULATION is not set
+CONFIG_BACKLIGHT_CLASS_DEVICE=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_HRTIMER=y
+CONFIG_SND_DYNAMIC_MINORS=y
+# CONFIG_SND_SUPPORT_OLD_API is not set
+# CONFIG_SND_DRIVERS is not set
+CONFIG_SND_USB_AUDIO=y
+CONFIG_SND_SOC=y
+CONFIG_HID_BATTERY_STRENGTH=y
+CONFIG_HIDRAW=y
+CONFIG_UHID=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BETOP_FF=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_UCLOGIC=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_NINTENDO=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PLANTRONICS=y
+CONFIG_HID_PLAYSTATION=y
+CONFIG_PLAYSTATION_FF=y
+CONFIG_HID_ROCCAT=y
+CONFIG_HID_SONY=y
+CONFIG_SONY_FF=y
+CONFIG_HID_STEAM=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_USB_HIDDEV=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_OTG=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_ROOT_HUB_TT=y
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_ACM=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_UAS=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_DUMMY_HCD=y
+CONFIG_USB_CONFIGFS=y
+CONFIG_USB_CONFIGFS_UEVENT=y
+CONFIG_USB_CONFIGFS_SERIAL=y
+CONFIG_USB_CONFIGFS_ACM=y
+CONFIG_USB_CONFIGFS_NCM=y
+CONFIG_USB_CONFIGFS_ECM=y
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_EEM=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_FS=y
+CONFIG_USB_CONFIGFS_F_ACC=y
+CONFIG_USB_CONFIGFS_F_AUDIO_SRC=y
+CONFIG_USB_CONFIGFS_F_UAC2=y
+CONFIG_USB_CONFIGFS_F_MIDI=y
+CONFIG_USB_CONFIGFS_F_HID=y
+CONFIG_TYPEC=y
+CONFIG_TYPEC_TCPM=y
+CONFIG_TYPEC_TCPCI=y
+CONFIG_TYPEC_UCSI=y
+CONFIG_MMC=y
+# CONFIG_PWRSEQ_EMMC is not set
+# CONFIG_PWRSEQ_SIMPLE is not set
+CONFIG_MMC_CRYPTO=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_LEDS_CLASS_FLASH=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_TRANSIENT=y
+CONFIG_EDAC=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_PL030=y
+CONFIG_RTC_DRV_PL031=y
+CONFIG_DMABUF_HEAPS=y
+CONFIG_DMABUF_SYSFS_STATS=y
+CONFIG_DMABUF_HEAPS_DEFERRED_FREE=y
+CONFIG_DMABUF_HEAPS_PAGE_POOL=y
+CONFIG_UIO=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_STAGING=y
+CONFIG_ASHMEM=y
+CONFIG_DEBUG_KINFO=y
+CONFIG_COMMON_CLK_SCPI=y
+# CONFIG_SPRD_COMMON_CLK is not set
+# CONFIG_CLK_SUNXI is not set
+# CONFIG_SUNXI_CCU is not set
+CONFIG_HWSPINLOCK=y
+CONFIG_SUN4I_TIMER=y
+# CONFIG_SUN50I_ERRATUM_UNKNOWN1 is not set
+CONFIG_MTK_TIMER=y
+CONFIG_MAILBOX=y
+CONFIG_IOMMU_LIMIT_IOVA_ALIGNMENT=y
+CONFIG_IOMMU_IO_PGTABLE_ARMV7S=y
+CONFIG_REMOTEPROC=y
+CONFIG_REMOTEPROC_CDEV=y
+CONFIG_RPMSG_CHAR=y
+CONFIG_DEVFREQ_GOV_PERFORMANCE=y
+CONFIG_DEVFREQ_GOV_POWERSAVE=y
+CONFIG_DEVFREQ_GOV_USERSPACE=y
+CONFIG_DEVFREQ_GOV_PASSIVE=y
+CONFIG_PM_DEVFREQ_EVENT=y
+CONFIG_IIO=y
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_TRIGGER=y
+CONFIG_PWM=y
+CONFIG_GENERIC_PHY=y
+CONFIG_POWERCAP=y
+CONFIG_DTPM=y
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_ANDROID_BINDERFS=y
+CONFIG_ANDROID_DEBUG_SYMBOLS=y
+CONFIG_ANDROID_VENDOR_HOOKS=y
+CONFIG_LIBNVDIMM=y
+# CONFIG_ND_BLK is not set
+CONFIG_INTERCONNECT=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_POSIX_ACL=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_F2FS_FS=y
+CONFIG_F2FS_FS_SECURITY=y
+CONFIG_F2FS_FS_COMPRESSION=y
+CONFIG_FS_ENCRYPTION=y
+CONFIG_FS_ENCRYPTION_INLINE_CRYPT=y
+CONFIG_FS_VERITY=y
+CONFIG_FS_VERITY_BUILTIN_SIGNATURES=y
+# CONFIG_DNOTIFY is not set
+CONFIG_QUOTA=y
+CONFIG_QFMT_V2=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_OVERLAY_FS=y
+CONFIG_INCREMENTAL_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_EXFAT_FS=y
+CONFIG_TMPFS=y
+# CONFIG_EFIVAR_FS is not set
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_PMSG=y
+CONFIG_PSTORE_RAM=y
+CONFIG_EROFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_CODEPAGE_737=y
+CONFIG_NLS_CODEPAGE_775=y
+CONFIG_NLS_CODEPAGE_850=y
+CONFIG_NLS_CODEPAGE_852=y
+CONFIG_NLS_CODEPAGE_855=y
+CONFIG_NLS_CODEPAGE_857=y
+CONFIG_NLS_CODEPAGE_860=y
+CONFIG_NLS_CODEPAGE_861=y
+CONFIG_NLS_CODEPAGE_862=y
+CONFIG_NLS_CODEPAGE_863=y
+CONFIG_NLS_CODEPAGE_864=y
+CONFIG_NLS_CODEPAGE_865=y
+CONFIG_NLS_CODEPAGE_866=y
+CONFIG_NLS_CODEPAGE_869=y
+CONFIG_NLS_CODEPAGE_936=y
+CONFIG_NLS_CODEPAGE_950=y
+CONFIG_NLS_CODEPAGE_932=y
+CONFIG_NLS_CODEPAGE_949=y
+CONFIG_NLS_CODEPAGE_874=y
+CONFIG_NLS_ISO8859_8=y
+CONFIG_NLS_CODEPAGE_1250=y
+CONFIG_NLS_CODEPAGE_1251=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_ISO8859_2=y
+CONFIG_NLS_ISO8859_3=y
+CONFIG_NLS_ISO8859_4=y
+CONFIG_NLS_ISO8859_5=y
+CONFIG_NLS_ISO8859_6=y
+CONFIG_NLS_ISO8859_7=y
+CONFIG_NLS_ISO8859_9=y
+CONFIG_NLS_ISO8859_13=y
+CONFIG_NLS_ISO8859_14=y
+CONFIG_NLS_ISO8859_15=y
+CONFIG_NLS_KOI8_R=y
+CONFIG_NLS_KOI8_U=y
+CONFIG_NLS_MAC_ROMAN=y
+CONFIG_NLS_MAC_CELTIC=y
+CONFIG_NLS_MAC_CENTEURO=y
+CONFIG_NLS_MAC_CROATIAN=y
+CONFIG_NLS_MAC_CYRILLIC=y
+CONFIG_NLS_MAC_GAELIC=y
+CONFIG_NLS_MAC_GREEK=y
+CONFIG_NLS_MAC_ICELAND=y
+CONFIG_NLS_MAC_INUIT=y
+CONFIG_NLS_MAC_ROMANIAN=y
+CONFIG_NLS_MAC_TURKISH=y
+CONFIG_NLS_UTF8=y
+CONFIG_UNICODE=y
+CONFIG_SECURITY=y
+CONFIG_SECURITYFS=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_HARDENED_USERCOPY=y
+# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
+CONFIG_FORTIFY_SOURCE=y
+CONFIG_STATIC_USERMODEHELPER=y
+CONFIG_STATIC_USERMODEHELPER_PATH=""
+CONFIG_SECURITY_SELINUX=y
+CONFIG_INIT_STACK_ALL_ZERO=y
+CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
+CONFIG_CRYPTO_CHACHA20POLY1305=y
+CONFIG_CRYPTO_ADIANTUM=y
+CONFIG_CRYPTO_XCBC=y
+CONFIG_CRYPTO_BLAKE2B=y
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_LZ4=y
+CONFIG_CRYPTO_ZSTD=y
+CONFIG_CRYPTO_ANSI_CPRNG=y
+CONFIG_CRC8=y
+CONFIG_XZ_DEC=y
+CONFIG_DMA_CMA=y
+CONFIG_STACK_HASH_ORDER=12
+CONFIG_PRINTK_TIME=y
+CONFIG_PRINTK_CALLER=y
+CONFIG_DYNAMIC_DEBUG_CORE=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF4=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_HEADERS_INSTALL=y
+# CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_UBSAN=y
+CONFIG_UBSAN_TRAP=y
+CONFIG_UBSAN_LOCAL_BOUNDS=y
+# CONFIG_UBSAN_MISC is not set
+CONFIG_PAGE_OWNER=y
+CONFIG_PAGE_PINNER=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_KASAN=y
+CONFIG_KASAN_HW_TAGS=y
+CONFIG_KFENCE=y
+CONFIG_KFENCE_SAMPLE_INTERVAL=500
+CONFIG_KFENCE_NUM_OBJECTS=63
+CONFIG_PANIC_ON_OOPS=y
+CONFIG_PANIC_TIMEOUT=-1
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_WQ_WATCHDOG=y
+CONFIG_SCHEDSTATS=y
+# CONFIG_DEBUG_PREEMPT is not set
+CONFIG_BUG_ON_DATA_CORRUPTION=y
+CONFIG_TRACE_MMIO_ACCESS=y
+CONFIG_TRACEFS_DISABLE_AUTOMOUNT=y
+CONFIG_HIST_TRIGGERS=y
+# CONFIG_RUNTIME_TESTING_MENU is not set