On Fri, Nov 15, 2019 at 11:34:52AM +0800, Liu, Aaron wrote:
> Secure buffer is only able to be read with trusted ip block.
> So we need use GFX ip to read it back instead of CPU.
> Steps:
> 1. use write_data packet to write 0xdeadbeaf to secure buffer,
> 2. use atmoic_mem packet and ATOMIC_CMPSWAP_RTN_32 opcode to compare
> the cmp_data(0xdeadbeaf) to the written data which has been encrypted.
> If the result is equal, then overwrite the src_data(0x12345678) to the
> secure buffer and return directly. Otherwise loop again until gfx timeout
> and the secure buffer data unchanged.
>
> Signed-off-by: Aaron Liu <aaron.liu@xxxxxxx>
Reviewed-by: Huang Rui <ray.huang@xxxxxxx>
> ---
> tests/amdgpu/basic_tests.c | 43 +++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 41 insertions(+), 2 deletions(-)
>
> diff --git a/tests/amdgpu/basic_tests.c b/tests/amdgpu/basic_tests.c
> index 956be93..907237e 100644
> --- a/tests/amdgpu/basic_tests.c
> +++ b/tests/amdgpu/basic_tests.c
> @@ -160,6 +160,20 @@ CU_TestInfo basic_tests[] = {
> * 2 - ce
> */
>
> +#define PACKET3_ATOMIC_MEM 0x1E
> +#define TC_OP_ATOMIC_CMPSWAP_RTN_32 0x00000008
> +#define ATOMIC_MEM_COMMAND(x) ((x) << 8)
> + /* 0 - single_pass_atomic.
> + * 1 - loop_until_compare_satisfied.
> + */
> +#define ATOMIC_MEM_CACHEPOLICAY(x) ((x) << 25)
> + /* 0 - lru.
> + * 1 - stream.
> + */
> +#define ATOMIC_MEM_ENGINESEL(x) ((x) << 30)
> + /* 0 - micro_engine.
> + */
> +
> #define PACKET3_DMA_DATA 0x50
> /* 1. header
> * 2. CONTROL
> @@ -1472,8 +1486,33 @@ amdgpu_command_submission_write_linear_helper_with_secure(amdgpu_device_handle
>
> /* verify if SDMA test result meets with expected */
> i = 0;
> - while(i < sdma_write_length) {
> - CU_ASSERT_EQUAL(bo_cpu[i++], 0xdeadbeaf);
> + if (!secure) {
> + while(i < sdma_write_length) {
> + CU_ASSERT_EQUAL(bo_cpu[i++], 0xdeadbeaf);
> + }
> + } else if (ip_type == AMDGPU_HW_IP_GFX) {
> + memset((void*)pm4, 0, pm4_dw * sizeof(uint32_t));
> + pm4[i++] = PACKET3(PACKET3_ATOMIC_MEM, 7);
> + /* atomic opcode for 32b w/ RTN and ATOMIC_SWAPCMP_RTN
> + * command, 1-loop_until_compare_satisfied.
> + * single_pass_atomic, 0-lru
> + * engine_sel, 0-micro_engine
> + */
> + pm4[i++] = (TC_OP_ATOMIC_CMPSWAP_RTN_32 |
> + ATOMIC_MEM_COMMAND(1) |
> + ATOMIC_MEM_CACHEPOLICAY(0) |
> + ATOMIC_MEM_ENGINESEL(0));
> + pm4[i++] = 0xfffffffc & bo_mc;
> + pm4[i++] = (0xffffffff00000000 & bo_mc) >> 32;
> + pm4[i++] = 0x12345678;
> + pm4[i++] = 0x0;
> + pm4[i++] = 0xdeadbeaf;
> + pm4[i++] = 0x0;
> + pm4[i++] = 0x100;
> + amdgpu_test_exec_cs_helper_raw(device, context_handle,
> + ip_type, ring_id, i, pm4,
> + 1, resources, ib_info,
> + ibs_request, true);
> }
>
> r = amdgpu_bo_unmap_and_free(bo, va_handle, bo_mc,
> --
> 2.7.4
>
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