From fc6ea4bee130710a77ec16a86d2013e964602503 Mon Sep 17 00:00:00 2001 From: Felix Kuehling <Felix.Kuehling@amd.com> Date: Tue, 25 Jan 2022 10:51:49 -0500 Subject: [PATCH] drm/amdgpu: Wipe all VRAM on free when RAS is enabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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> --- 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 5661b82d84d46..ec29365d108d9 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)) -- GitLab