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drm/amdgpu: Wipe all VRAM on free when RAS is enabled

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On GPUs with RAS, poison can propagate between processes if VRAM is not
cleared when it is freed or allocated. The reason is, that not all write
accesses clear RAS poison. 32-byte writes by the SDMA engine do clear RAS
poison. Clearing memory in the background when it is freed should avoid
major performance impact. KFD has been doing this already for a long time.

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>
This commit is contained in:
Felix Kuehling 2022-01-25 10:51:49 -05:00 committed by Alex Deucher
parent 7270e8957e
commit fc6ea4bee1
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
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@ -575,6 +575,9 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
if (!amdgpu_bo_support_uswc(bo->flags))
bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
if (adev->ras_enabled)
bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
bo->tbo.bdev = &adev->mman.bdev;
if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
AMDGPU_GEM_DOMAIN_GDS))