diff --git a/meta-arm/meta-arm-bsp/recipes-security/trusted-services/secure-partitions/corstone1000/0043-pass-sysroot_yocto.patch b/meta-arm/meta-arm-bsp/recipes-security/trusted-services/secure-partitions/corstone1000/0043-pass-sysroot_yocto.patch
new file mode 100644
index 0000000..64ac094
--- /dev/null
+++ b/meta-arm/meta-arm-bsp/recipes-security/trusted-services/secure-partitions/corstone1000/0043-pass-sysroot_yocto.patch
@@ -0,0 +1,110 @@
+From 24436d459ddde697c89ff947c821cec9c5e0906e Mon Sep 17 00:00:00 2001
+From: Vishnu Banavath <vishnu.banavath@arm.com>
+Date: Wed, 16 Feb 2022 15:55:55 +0000
+Subject: [PATCH] pass sysroot_yocto
+
+Upstream-Status: Pending [Not submitted to upstream yet]
+Signed-off-by: Emekcan Aras <Emekcan.Aras@arm.com>
+
+
+---
+ deployments/libts/libts-import.cmake         |  3 +++
+ external/MbedTLS/MbedTLS.cmake               |  1 +
+ external/psa_arch_tests/psa_arch_tests.cmake | 25 +++++++++++++-------
+ 3 files changed, 20 insertions(+), 9 deletions(-)
+
+diff --git a/deployments/libts/libts-import.cmake b/deployments/libts/libts-import.cmake
+index 792ba86c..b900ce3f 100644
+--- a/deployments/libts/libts-import.cmake
++++ b/deployments/libts/libts-import.cmake
+@@ -27,9 +27,12 @@ set(LIBTS_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/_deps/libts-build" CACHE PATH
+ 
+ file(MAKE_DIRECTORY ${LIBTS_BINARY_DIR})
+ 
++set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --sysroot=${SYSROOT_YOCTO}")
++
+ #Configure the library
+ execute_process(COMMAND
+ 	${CMAKE_COMMAND}
++                -DCMAKE_SYSROOT=${SYSROOT_YOCTO}
+ 		-DCMAKE_INSTALL_PREFIX=${LIBTS_INSTALL_PATH}
+ 		-GUnix\ Makefiles
+ 		${LIBTS_SOURCE_DIR}
+diff --git a/external/MbedTLS/MbedTLS.cmake b/external/MbedTLS/MbedTLS.cmake
+index 3350d8a0..33467cf0 100644
+--- a/external/MbedTLS/MbedTLS.cmake
++++ b/external/MbedTLS/MbedTLS.cmake
+@@ -103,6 +103,7 @@ if (NOT MBEDCRYPTO_LIB_FILE)
+ 	execute_process(COMMAND
+ 		${CMAKE_COMMAND} -E env CROSS_COMPILE=${CROSS_COMPILE}
+ 			${CMAKE_COMMAND}
++                                -DCMAKE_SYSROOT=${SYSROOT_YOCTO}
+ 				-DENABLE_PROGRAMS=OFF
+ 				-DENABLE_TESTING=OFF
+ 				-DUNSAFE_BUILD=ON
+diff --git a/external/psa_arch_tests/psa_arch_tests.cmake b/external/psa_arch_tests/psa_arch_tests.cmake
+index f6d2fb9f..42f73a37 100644
+--- a/external/psa_arch_tests/psa_arch_tests.cmake
++++ b/external/psa_arch_tests/psa_arch_tests.cmake
+@@ -5,30 +5,33 @@
+ #
+ #-------------------------------------------------------------------------------
+ 
+-# Temporarily using modified tests used for tf-m verification
++# Determine the number of processes to run while running parallel builds.
++# Pass -DPROCESSOR_COUNT=<n> to cmake to override.
++if(NOT DEFINED PROCESSOR_COUNT)
++	include(ProcessorCount)
++	ProcessorCount(PROCESSOR_COUNT)
++	set(PROCESSOR_COUNT ${PROCESSOR_COUNT} CACHE STRING "Number of cores to use for parallel builds.")
++endif()
++
+ set(PSA_ARCH_TESTS_URL "https://github.com/bensze01/psa-arch-tests.git" CACHE STRING "psa-arch-tests repository URL")
+ set(PSA_ARCH_TESTS_REFSPEC "fix-multipart-aead" CACHE STRING "psa-arch-tests git refspec")
+-
+-#set(PSA_ARCH_TESTS_URL "https://github.com/ARM-software/psa-arch-tests.git" CACHE STRING "psa-arch-tests repository URL")
+-#set(PSA_ARCH_TESTS_REFSPEC "2a1852252a9b9af655cbe02d5d3c930952d0d798" CACHE STRING "psa-arch-tests v22.01_API1.4_ADAC_BETA")
+ set(PSA_ARCH_TESTS_INSTALL_PATH "${CMAKE_CURRENT_BINARY_DIR}/psa-arch-tests_install" CACHE PATH "psa-arch-tests installation directory")
+ set(PSA_ARCH_TESTS_PACKAGE_PATH "${PSA_ARCH_TESTS_INSTALL_PATH}/libpsa-arch-tests/cmake" CACHE PATH "psa-arch-tests CMake package directory")
+-set(PSA_ARCH_TESTS_SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/_deps/psa_arch_tests-src" CACHE PATH "psa-arch-tests source.")
++
++include(FetchContent)
+ 
+ # Checking git
+ find_program(GIT_COMMAND "git")
+ if (NOT GIT_COMMAND)
+ 	message(FATAL_ERROR "Please install git")
+ endif()
+-
++if ("${PSA_ARCH_TESTS_PATH}" STREQUAL "DOWNLOAD")
+ # Fetching psa-arch-tests
+ FetchContent_Declare(
+ 	psa-arch-tests
+ 	GIT_REPOSITORY ${PSA_ARCH_TESTS_URL}
+ 	GIT_TAG ${PSA_ARCH_TESTS_REFSPEC}
+ 	GIT_SHALLOW TRUE
+-	PATCH_COMMAND git stash
+-		COMMAND git apply ${CMAKE_CURRENT_LIST_DIR}/modify_attest_config.patch
+ )
+ 
+ # FetchContent_GetProperties exports psa-arch-tests_SOURCE_DIR and psa-arch-tests_BINARY_DIR variables
+@@ -37,7 +40,10 @@ if(NOT psa-arch-tests_POPULATED)
+ 	message(STATUS "Fetching psa-arch-tests")
+ 	FetchContent_Populate(psa-arch-tests)
+ endif()
+-
++else()
++    set(psa-arch-tests_SOURCE_DIR "${TS_ROOT}/../psa-arch-tests")
++    set(psa-arch-tests_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}")
++endif()
+ # Ensure list of include paths is separated correctly
+ string(REPLACE ";" "\\;" PSA_ARCH_TESTS_EXTERNAL_INCLUDE_PATHS "${PSA_ARCH_TESTS_EXTERNAL_INCLUDE_PATHS}")
+ 
+@@ -47,6 +53,7 @@ string(REPLACE ";" " " PSA_ARCH_TEST_EXTERNAL_DEFS "${PSA_ARCH_TEST_EXTERNAL_DEF
+ # Configure the psa-arch-test library
+ execute_process(COMMAND
+ 	${CMAKE_COMMAND}
++			-DCMAKE_SYSROOT=${SYSROOT_YOCTO}
+ 			-DTOOLCHAIN=INHERIT
+ 			-DCMAKE_TOOLCHAIN_FILE=${TS_EXTERNAL_LIB_TOOLCHAIN_FILE}
+ 			-DPSA_INCLUDE_PATHS=${PSA_ARCH_TESTS_EXTERNAL_INCLUDE_PATHS}