This patch set adds support for an application to query GPU page faults. It's useful for debugging and there are vulkan extensions that could make use of this. Preliminary user space code which uses this can be found here: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23238 https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/298 Note, that I made a small change to the vmhub definition to decouple it from how the kernel tracks vmhubs so that we have a consistent user view even if we decide to add more vmhubs like we recently did for gfx 9.4.3. I've also pushed the changed to: https://gitlab.freedesktop.org/agd5f/linux/-/commits/gpu_fault_info_ioctl Open question, currently we just expose the raw GPU fault status register value for each GPU so UMDs need GPU specific knowlege to decode it, although it's largely the same across generations. One option would be to translate to a generic GPU independent fault status. Opinions? v2: - Fix spelling typos noted by Guchun v3: - Add locking in IOCTL query - Only update cache if fault status is valid v4: - Rebase and resend Alex Deucher (4): drm/amdgpu: add cached GPU fault structure to vm struct drm/amdgpu: cache gpuvm fault information for gmc7+ drm/amdgpu: add new INFO ioctl query for the last GPU page fault drm/amdgpu: refine fault cache updates drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 +- drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 20 ++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 50 +++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 31 +++++++++++++-- drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 3 ++ drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c | 3 ++ drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 3 ++ drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 3 ++ drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 11 ++++-- include/uapi/drm/amdgpu_drm.h | 16 ++++++++ 10 files changed, 135 insertions(+), 8 deletions(-) -- 2.41.0
