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authorChristian König <christian.koenig@amd.com>2015-05-13 14:30:53 +0200
committerAlex Deucher <alexander.deucher@amd.com>2015-06-03 21:03:43 -0400
commit271c81256612b162a9ae0f8c0f0a055a7523cea5 (patch)
tree344441e66f38b751741730a6c761f3a102527897 /drivers
parent25a595e48261e8d44970b6a5cfafc283f9a9fbc5 (diff)
downloadkernel-271c81256612b162a9ae0f8c0f0a055a7523cea5.tar.gz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c3
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_object.c3
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 5fd0bc73b302..8dd843da799f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -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;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 992b7f5843bc..a721f5044557 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -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;