drm/i915: Prevent writing into a read-only object via a GGTT mmap

[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / i915 / i915_gem_object.h

diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h
index 63ce38c1cce9cb0a39780761223aea2f09760144..6b1de7942349343fb539ccb2e191b3dab938ff65 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/i915_gem_object.h
@@ -140,7 +140,6 @@ struct drm_i915_gem_object {
         * Is the object to be mapped as read-only to the GPU
         * Only honoured if hardware has relevant pte bit
         */
-       unsigned long gt_ro:1;
        unsigned int cache_level:3;
        unsigned int cache_coherent:2;
 #define I915_BO_CACHE_COHERENT_FOR_READ BIT(0)
@@ -349,6 +348,18 @@ static inline void i915_gem_object_unlock(struct drm_i915_gem_object *obj)
        reservation_object_unlock(obj->resv);
 }
 
+static inline void
+i915_gem_object_set_readonly(struct drm_i915_gem_object *obj)
+{
+       obj->base.vma_node.readonly = true;
+}
+
+static inline bool
+i915_gem_object_is_readonly(const struct drm_i915_gem_object *obj)
+{
+       return obj->base.vma_node.readonly;
+}
+
 static inline bool
 i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
 {