| From 3035651bfc0dcdfd48d28acff6efe2f29bbe9439 Mon Sep 17 00:00:00 2001 |
| From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> |
| Date: Thu, 6 Oct 2022 15:04:25 +0100 |
| Subject: [PATCH 04/25] arm_ffa: efi: unmap RX/TX buffers |
| |
| unmap RX/TX buffers at ExitBootServices() |
| |
| Unmapping the RX/TX buffers created by u-boot is needed before EFI |
| runtime. |
| |
| At EFI runtime the linux kernel takes care of allocating its own RX/TX |
| buffers and registering them with the secure world. |
| |
| Secure world should be using the RX/TX buffers created by the kernel. |
| So, RX/TX buffers created by u-boot must be unmapped. |
| |
| Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> |
| Cc: Tom Rini <trini@konsulko.com> |
| Cc: Simon Glass <sjg@chromium.org> |
| Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org> |
| Cc: Jens Wiklander <jens.wiklander@linaro.org> |
| Upstream-Status: Submitted [cover letter: https://lore.kernel.org/all/20221122131751.22747-1-abdellatif.elkhlifi@arm.com/] |
| |
| Changelog: |
| =============== |
| |
| v8: pass NULL device pointer to the FF-A bus operation |
| v7: replace debug() by log_err() |
| --- |
| lib/efi_loader/efi_boottime.c | 13 +++++++++++++ |
| 1 file changed, 13 insertions(+) |
| |
| diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c |
| index 6f7333638a..caa64028be 100644 |
| --- a/lib/efi_loader/efi_boottime.c |
| +++ b/lib/efi_loader/efi_boottime.c |
| @@ -3,6 +3,9 @@ |
| * EFI application boot time services |
| * |
| * Copyright (c) 2016 Alexander Graf |
| + * |
| + * (C) Copyright 2022 ARM Limited |
| + * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> |
| */ |
| |
| #include <common.h> |
| @@ -23,6 +26,10 @@ |
| #include <asm/setjmp.h> |
| #include <linux/libfdt_env.h> |
| |
| +#if CONFIG_IS_ENABLED(ARM_FFA_TRANSPORT) |
| +#include <arm_ffa.h> |
| +#endif |
| + |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| /* Task priority level */ |
| @@ -2178,6 +2185,12 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, |
| dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); |
| } |
| |
| +#if CONFIG_IS_ENABLED(ARM_FFA_TRANSPORT) |
| + /* unmap FF-A RX/TX buffers */ |
| + if (ffa_bus_ops_get()->rxtx_unmap(NULL)) |
| + log_err("Can't unmap FF-A RX/TX buffers\n"); |
| +#endif |
| + |
| /* Patch out unsupported runtime function */ |
| efi_runtime_detach(); |
| |
| -- |
| 2.17.1 |
| |