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@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index ff9dc377a3a0..36bb41b027ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -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)) -- 2.32.0
