modules: trusted-firmware-a: Disable AArch32 context for ARMv9-A

ARMv9-A is AArch64-only and does not support AArch32 execution states
at EL1/EL2/EL3. Configure TF-A build to disable AArch32 register
context (CTX_INCLUDE_AARCH32_REGS=0) when building for ARMv9-A platforms.

This fixes TF-A boot failures on ARMv9-A non-secure variants where
TF-A would panic with:
  ERROR: EL1 supports AArch64-only. Please set build flag
         CTX_INCLUDE_AARCH32_REGS = 0

Signed-off-by: Nicolas Pitre <[email protected]>

Author: Nicolas Pitre

modules/trusted-firmware-a/CMakeLists.txt

@@ -28,12 +28,20 @@ if (CONFIG_BUILD_WITH_TFA)
     set(TFA_BUILD_DEBUG "0")
   endif()
 
+  # ARMv9-A is AArch64-only, disable AArch32 register context
+  if (CONFIG_ARMV9_A)
+    set(TFA_AARCH32_REGS "CTX_INCLUDE_AARCH32_REGS=0")
+  else()
+    set(TFA_AARCH32_REGS "")
+  endif()
+
   set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
       COMMAND make -C ${ZEPHYR_TRUSTED_FIRMWARE_A_MODULE_DIR}
             DEBUG=${TFA_BUILD_DEBUG}
             CROSS_COMPILE=${CROSS_COMPILE}
             BUILD_BASE=${TFA_BINARY_DIR} PLAT=${TFA_PLAT}
             BL33=${CMAKE_BINARY_DIR}/zephyr/${KERNEL_BIN_NAME}
+            ${TFA_AARCH32_REGS}
             all fip
   )
 endif()