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drm/amdgpu: enforce AMDGPU_GEM_CREATE_NO_CPU_ACCESS

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Deny user and kernel mapping if we said we never want to do so.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-05-13 14:30:53 +02:00 committed by Alex Deucher
parent 25a595e482
commit 271c812566
2 changed files with 5 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
View file

@ -316,7 +316,8 @@ int amdgpu_mode_dumb_mmap(struct drm_file *filp,
return -ENOENT;
}
robj = gem_to_amdgpu_bo(gobj);
if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm)) {
if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm) ||
(robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
drm_gem_object_unreference_unlocked(gobj);
return -EPERM;
}

3
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
View file

@ -263,6 +263,9 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
bool is_iomem;
int r;
if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
return -EPERM;
if (bo->kptr) {
if (ptr) {
*ptr = bo->kptr;