diff options
| author | Dave Airlie <airlied@redhat.com> | 2021-07-26 09:27:59 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2021-07-26 09:27:59 +1000 |
| commit | 35482f9dc56b9bd0f179106da7e461f6c2a2d891 (patch) | |
| tree | b04c95e464c3724b5b5b0ba50ad4a26886b2497a /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | 8da49a33dda7294c1af508f8aa81cd638d0afd62 (diff) | |
| parent | ff1176468d368232b684f75e82563369208bc371 (diff) | |
Backmerge tag 'v5.14-rc3' into drm-next
Linux 5.14-rc3
Daniel said we should pull the nouveau fix from fixes in here, probably
a good plan.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index a25160797b61..611fd10c3410 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -255,6 +255,15 @@ static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_str if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) return -EPERM; + /* Workaround for Thunk bug creating PROT_NONE,MAP_PRIVATE mappings + * for debugger access to invisible VRAM. Should have used MAP_SHARED + * instead. Clearing VM_MAYWRITE prevents the mapping from ever + * becoming writable and makes is_cow_mapping(vm_flags) false. + */ + if (is_cow_mapping(vma->vm_flags) && + !(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))) + vma->vm_flags &= ~VM_MAYWRITE; + return drm_gem_ttm_mmap(obj, vma); } |