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Hello Team,

I followed for Developing OP-TEE TA's. After setting the required environment variables, I built the Optee example. But I failed to with the followed error:

entering directory '....../optee_examples/hello_world/ta'
gcc: error: unrecognized command line option '-mstrict-align'

So I added an environment variable for TA_CROSS_COMPILE just like the HOST_CROSS_COMPILE

export TA_CROSS_COMPILE=aarch64-linux-gnu-

Then the build was successful. However, I'm not sure.
Could you please tell me that is this the right way to build an application for Grapeboard?

Thank you in advance.
Vincent

Hello Team,
Thanks for the great work.

I'm trying to increase secure memory in the TA, but failed. It seems the maximum TZRAM could reach 64 MB. I checked the conf.mk in optee_os/core/arch/arm/plat-ls/, which said:

$(call force,CFG_DRAM0_BASE,0x80000000)
$(call force,CFG_TEE_OS_DRAM0_SIZE,0x4000000)

ifeq ($(PLATFORM_FLAVOR),ls1012grapeboard)
CFG_HW_UNQ_KEY_REQUEST ?= y
include core/arch/arm/cpu/cortex-armv8-0.mk
$(call force,CFG_TEE_CORE_NB_CORE,1)
$(call force,CFG_DRAM0_SIZE,0x40000000)
$(call force,CFG_CORE_CLUSTER_SHIFT,2)
*CFG_SHMEM_SIZE ?= 0x00200000*
CFG_CYRES ?= y
CFG_CYRES_CERT_CHAIN_ADDR ?= 0x81FFD000
CFG_CYRES_KEY_ADDR ?= 0x81FFC000
CFG_TA_RPC ?= y
endif

CFG_TZDRAM_START ?= ((CFG_DRAM0_BASE + CFG_DRAM0_SIZE) - CFG_TEE_OS_DRAM0_SIZE)
CFG_TZDRAM_SIZE ?= ( CFG_TEE_OS_DRAM0_SIZE - CFG_SHMEM_SIZE)

So the CFG_TZDRAM_SIZE should be around 60 MB at least. However, when I give my TA up to 5 MB for DATA_SIZE in user_ta_header_defines.h, the TA break with 0xffff0008 error. In contrast, 4 MB will not lead to the fail.
Do you have any advice about this problem? Any comment is appreciated.

Thanks,
Vincent