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8725aecac3
On Raven multiple PPRs can be queued up by the hardware. When the first of those requests is handled by the IOMMU driver, the memory access succeeds. After that the application may be done with the memory and unmap it. At that point the page table entries are invalidated, but there are still outstanding duplicate PPRs for those addresses. When the IOMMU driver processes those duplicate requests, it finds invalid page table entries and triggers an invalid PPR fault. As a workaround, don't signal invalid PPR faults on Raven to avoid segfaulting applications that haven't done anything wrong. As a side effect, real GPU memory access faults may go unnoticed by the application. Signed-off-by: Yong Zhao <yong.zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> |
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| acp | ||
| amdgpu | ||
| amdkfd | ||
| display | ||
| include | ||
| lib | ||
| powerplay | ||