How to enlarge the PTA heap size to store large amounts of data?

[zwb-233]

Hi, I'm trying to store a lot of data in PTA in hikey960, which may be larger than 80MB.

I resized CFG_CORE_HEAP_SIZE, but it doesn't seem to exceed 14MB. Beyond this value, compilation will fail. Is there any way to continue to increase CFG_CORE_HEAP_SIZE?

Or can I make PTA use secure memory like dynamic ta? I've increased the size of secure memory to 512MB.

[jenswi-linaro]

When increasing OP-TEE core memory like this it is expected to run into various errors. The error you're currently seeing is likely only one of many. I'm afraid you'll need to debug and sort out most of them yourself, but I can help review the patches when upstreaming.

[zwb-233]

/*
 *  0x4000_0000                               -
 *    TA RAM: 14 MiB                          |
 *  0x3F20_0000                               | TZDRAM
 *    TEE RAM: 2 MiB (TEE_RAM_VA_SIZE)        |
 *  0x3F00_0000 [TZDRAM_BASE, BL32_LOAD_ADDR] -
 *    Shared memory: 2 MiB                    |
 *  0x3EE0_0000                               | DRAM0
 *    Reserved by UEFI for OP-TEE, unused     |
 *  0x3EC0_0000                               -
 *    Secure Data Path buffers: 4 MiB         | DRAM0 (secure)
 *  0x3E80_0000 [CFG_TEE_SDP_MEM_BASE]        -
 *    Reserved by UEFI for OP-TEE, unused     |
 *  0x3E00_0000                               | DRAM0
 *    Available to Linux                      |
 *  0x0000_0000 [DRAM0_BASE]                  -
 */

@jenswi-linaro Which of the above memory space is used by CFG_CORE_HEAP_SIZE?Does it use TA RAM memory space?

I found that CFG_TZDRAM_SIZE has been modified to 0x20000000(512MB).

[jenswi-linaro]

The OP-TEE Core heap is kept in TEE RAM.

[zwb-233]

I've increased the size of TEE RAM, and have not encountered any other problems so far. Thanks.