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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2019-07-10 02:12:44 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-08-02 18:18:32 +0300 |
| commit | ab2f7a5c18b5c17cc94aaab7ae2e7d1fa08993d6 (patch) | |
| tree | 78335d2cae1fe364bab737400bf4aa410f323435 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | |
| parent | d8f4981e2e8a968411105db568f3d48256b2ebbc (diff) | |
| download | linux-ab2f7a5c18b5c17cc94aaab7ae2e7d1fa08993d6.tar.xz | |
drm/amdgpu: Implement VRAM wipe on release
Wipe VRAM memory containing sensitive data when moving or releasing
BOs. Clearing the memory is pipelined to minimize any impact on
subsequent memory allocation latency. Use of a poison value should
help debug future use-after-free bugs.
When moving BOs, the existing ttm_bo_pipelined_move ensures that the
memory won't be reused before being wiped.
When releasing BOs, the BO is fenced with the memory fill operation,
which results in queuing the BO for a delayed delete.
v2: Move amdgpu_amdkfd_unreserve_memory_limit into
amdgpu_bo_release_notify so that KFD can use memory that's still
being cleared in the background
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h index caa76c693700..bccb8c49e597 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h @@ -38,6 +38,8 @@ #define AMDGPU_GTT_MAX_TRANSFER_SIZE 512 #define AMDGPU_GTT_NUM_TRANSFER_WINDOWS 2 +#define AMDGPU_POISON 0xd0bed0be + struct amdgpu_mman { struct ttm_bo_device bdev; bool mem_global_referenced; |