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drm/amdgpu: enforce AMDGPU_GEM_CREATE_NO_CPU_ACCESS
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>
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25a595e482
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271c812566
2 changed files with 5 additions and 1 deletions
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@ -316,7 +316,8 @@ int amdgpu_mode_dumb_mmap(struct drm_file *filp,
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return -ENOENT;
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}
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robj = gem_to_amdgpu_bo(gobj);
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if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm)) {
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if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm) ||
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(robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
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drm_gem_object_unreference_unlocked(gobj);
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return -EPERM;
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}
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@ -263,6 +263,9 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
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bool is_iomem;
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int r;
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if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
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return -EPERM;
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if (bo->kptr) {
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if (ptr) {
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*ptr = bo->kptr;
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