drm/i915/gvt: set guest display buffer as readonly

We shouldn't allow write for exposed guest display buffer which doesn't make sense. So explicitly set read only flag for display dmabuf allocated object. Fixes: e546e28 ("drm/i915/gvt: Dmabuf support for GVT-g") Cc: Tina Zhang <[email protected]> Acked-by: Tina Zhang <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
kawasaki · Dec 13, 2019 · 4fc0a3c · 4fc0a3c
1 parent 6d44694
commit 4fc0a3c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/gpu/drm/i915/gvt/dmabuf.c b/drivers/gpu/drm/i915/gvt/dmabuf.c
@@ -163,6 +163,7 @@ static struct drm_i915_gem_object *vgpu_create_gem(struct drm_device *dev,
 	drm_gem_private_object_init(dev, &obj->base,
 		roundup(info->size, PAGE_SIZE));
 	i915_gem_object_init(obj, &intel_vgpu_gem_ops, &lock_class);
+	i915_gem_object_set_readonly(obj);
 
 	obj->read_domains = I915_GEM_DOMAIN_GTT;
 	obj->write_domain = 0;