How to use 64MB secure memory at ls1012a

[mofanv]

Please help!

I want to use as much as secure memory on a ls1012a board. I tried the followed methods.

1. Increased PGT_CACHE_SIZE in /optee_os/core/arch/arm/include/mm/pgt_cache.h
#define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS 2, PGT_NUM_PGT_PER_PAGE)
changed to:
#define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS 130, PGT_NUM_PGT_PER_PAGE)

2. Decreased TTBCR_N_VALUE in /optee_os/core/arch/arm/mm/core_mmu_v7.c to the smallest possible
#define TTBCR_N_VALUE 7
changed to:
#define TTBCR_N_VALUE 5

3. Increased CFG_SHMEM_SIZE in /optee_os/core/arch/arm/plat-ls/conf.mk
CFG_SHMEM_SIZE ?= 0X00200000
changed to:
CFG_SHMEM_SIZE ?= 0X00400000

4. Tried to change memory size in user_ta_header_defines.h to:
#define TA_STACK_SIZE (1 * 1024 * 1024)
#define TA_DATA_SIZE (10 * 1024 * 1024)

I find the definition of CFG_TEE_OS_DRAM0_SIZE is 0x4000000 for plat-ls, which is 64MB. So the CFG_TZDRAM_SIZE is CFG_TEE_OS_DRAM0_SIZE - CFG_SHMEM_SIZE, around 60MB.

However, my TA gets errors at the segmentation fault. Could you please tell me, do I understand the memory map size in the correct way? How to correctly increase the secure memory?

Thank you in advance.
Vincent

[pangupta]

Can you share the board name, you are using?
Can you share the DRAM size on the board?

Also share the crash logs.

[mofanv]

@pangupta Thanks for the reply.
The board is Grapeboard. The DRAM size is 1GB.
The OP-TEE Implementation is from Openenclave.

I cannot see the crash logs, but only the segmentation fault. Even though having set the CFG_TEE_CORE_LOG_LEVEL=3 and CFG_TEE_TA_LOG_LEVEL=3, I still couldn't see any IMSG and DMSG logs from the Serial terminal. Have no clue why there is no log. :(

[pangupta]

I can see that you are trying to change parameters PGT_CACHE_SIZE, TTBCR_N_VALUE, ?
What is the reason for the same?

Yes, you can increase the OPTEE_OS DRAM size "CFG_TEE_OS_DRAM0_SIZE" by increasing its value.
and it should work, but we did not tested more than 64 MB.

[mofanv]

I changed PGT_CACHE_SIZE and TTBCR_N_VALUE according to steps in #2079. Before that, I have used this in QEMU.

I still think that the error in Grapeboard is because of the TZDRAM size. I tried several TA_STACK_SIZE and TA_DATA_SIZE in the Hello World example. After TA_DATA_SIZE larger than 5MB, the app failed with 0xffff0008.

Do I miss some parameters to use larger secure memory? 5 MB is still far from 60 MB.

[xiaxinkai]

@mofanv Do you solve the problem? I have met the same issue on Raspberry Pi 3b.

[github-actions]

This issue has been marked as a stale issue because it has been open (more than) 30 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this issue will automatically be closed in 5 days. Note, that you can always re-open a closed issue at any time.