在 2018年10月26日，18:59，Christian König <ckoenig.leichtzumerken@xxxxxxxxx> 写道：
>
> Make sure the kernel doesn't crash if we map something at the minimum/maximum address.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
> tests/amdgpu/vm_tests.c | 45 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 44 insertions(+), 1 deletion(-)
>
> diff --git a/tests/amdgpu/vm_tests.c b/tests/amdgpu/vm_tests.c
> index 7b6dc5d6..bbdeef4d 100644
> --- a/tests/amdgpu/vm_tests.c
> +++ b/tests/amdgpu/vm_tests.c
> @@ -31,8 +31,8 @@ static amdgpu_device_handle device_handle;
> static uint32_t major_version;
> static uint32_t minor_version;
>
> -
> static void amdgpu_vmid_reserve_test(void);
> +static void amdgpu_vm_mapping_test(void);
>
> CU_BOOL suite_vm_tests_enable(void)
> {
> @@ -84,6 +84,7 @@ int suite_vm_tests_clean(void)
>
> CU_TestInfo vm_tests[] = {
> { "resere vmid test", amdgpu_vmid_reserve_test },
> + { "vm mapping test", amdgpu_vm_mapping_test },
> CU_TEST_INFO_NULL,
> };
>
> @@ -167,3 +168,45 @@ static void amdgpu_vmid_reserve_test(void)
> r = amdgpu_cs_ctx_free(context_handle);
> CU_ASSERT_EQUAL(r, 0);
> }
> +
> +static void amdgpu_vm_mapping_test(void)
> +{
> + struct amdgpu_bo_alloc_request req = {0};
> + struct drm_amdgpu_info_device dev_info;
> + const uint64_t size = 4096;
> + amdgpu_bo_handle buf;
> + uint64_t addr;
> + int r;
> +
> + req.alloc_size = size;
> + req.phys_alignment = 0;
> + req.preferred_heap = AMDGPU_GEM_DOMAIN_GTT;
> + req.flags = 0;
> +
> + r = amdgpu_bo_alloc(device_handle, &req, &buf);
> + CU_ASSERT_EQUAL(r, 0);
> +
> + r = amdgpu_query_info(device_handle, AMDGPU_INFO_DEV_INFO,
> + sizeof(dev_info), &dev_info);
> + CU_ASSERT_EQUAL(r, 0);
> +
> + addr = dev_info.virtual_address_offset;
> + r = amdgpu_bo_va_op(buf, 0, size, addr, 0, AMDGPU_VA_OP_MAP);
> + CU_ASSERT_EQUAL(r, 0);
Please confirm:
We may need to unmap the VA before bo free, although this VA range is unlikely to be used by other test cases.
BTW, is it a chance in practice that a process may map different VA ranges to the same bo?
Regards,
Jerry
> +
> + addr = dev_info.virtual_address_max - size;
> + r = amdgpu_bo_va_op(buf, 0, size, addr, 0, AMDGPU_VA_OP_MAP);
> + CU_ASSERT_EQUAL(r, 0);
> +
> + if (dev_info.high_va_offset) {
> + addr = dev_info.high_va_offset;
> + r = amdgpu_bo_va_op(buf, 0, size, addr, 0, AMDGPU_VA_OP_MAP);
> + CU_ASSERT_EQUAL(r, 0);
> +
> + addr = dev_info.high_va_max - size;
> + r = amdgpu_bo_va_op(buf, 0, size, addr, 0, AMDGPU_VA_OP_MAP);
> + CU_ASSERT_EQUAL(r, 0);
> + }
> +
> + amdgpu_bo_free(buf);
> +}
> --
> 2.17.1
>
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