Quoting Lionel Landwerlin (2019-07-01 12:34:33)
> struct i915_execbuffer {
> struct drm_i915_private *i915; /** i915 backpointer */
> struct drm_file *file; /** per-file lookup tables and limits */
> @@ -275,6 +282,7 @@ struct i915_execbuffer {
>
> struct {
> u64 flags; /** Available extensions parameters */
> + struct drm_i915_gem_execbuffer_ext_timeline_fences timeline_fences;
> } extensions;
> };
> +static int parse_timeline_fences(struct i915_user_extension __user *ext, void *data)
> +{
> + struct i915_execbuffer *eb = data;
> +
> + /* Timeline fences are incompatible with the fence array flag. */
> + if (eb->args->flags & I915_EXEC_FENCE_ARRAY)
> + return -EINVAL;
> +
> + if (eb->extensions.flags & BIT(DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES))
> + return -EINVAL;
flags is 64b, so wiser if we use BIT_ULL() from the start. You don't
want to copy my bugs ;)
-Chris
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