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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2021-07-15 15:05:37 -0400 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2021-07-16 09:22:57 +0200 |
| commit | fa5239f2af983ffdf08395a542a7d6356b6222c5 (patch) | |
| tree | 0f8338f92a816824522f6468a60217667a6a996d /drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | |
| parent | 32a19de21ae40f0601f48575b610dde4f518ccc6 (diff) | |
drm/amdgpu: workaround failed COW checks for Thunk VMAs
KFD Thunk maps invisible VRAM BOs with PROT_NONE, MAP_PRIVATE.
is_cow_mapping returns true for these mappings, which causes mmap to fail
in ttm_bo_mmap_obj.
As a workaround, clear VM_MAYWRITE for PROT_NONE-COW mappings. This
should prevent the mapping from ever becoming writable and makes
is_cow_mapping(vm_flags) false.
Fixes: f91142c62161 ("drm/ttm: nuke VM_MIXEDMAP on BO mappings v3")
Suggested-by: Daniel Vetter <daniel.vetter@intel.com>
Tested-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715190537.585456-1-Felix.Kuehling@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c')
0 files changed, 0 insertions, 0 deletions