The intel IOMMU driver causes kernel oopses or internal errors flooding kernel log when mapping larger SG tables. Limiting the size of userptr BOs to 6GB seems to avoid this.
Signed-off-by: Felix Kuehling <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 2b8b89535198..3becf9d9f8fd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1409,6 +1409,9 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( domain = alloc_domain = AMDGPU_GEM_DOMAIN_GTT; alloc_flags = 0; } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) { + /* workaround IOMMU driver bug */ + if (size >= (6ULL << 30)) + return -ENOMEM; domain = AMDGPU_GEM_DOMAIN_GTT; alloc_domain = AMDGPU_GEM_DOMAIN_CPU; alloc_flags = AMDGPU_GEM_CREATE_PREEMPTIBLE; -- 2.31.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
