diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 264bec8f1f1..bf32527fc92 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2878,6 +2878,17 @@ i915_gem_clflush_object(struct drm_i915_gem_object *obj) if (obj->pages == NULL) return; + /* If the GPU is snooping the contents of the CPU cache, + * we do not need to manually clear the CPU cache lines. However, + * the caches are only snooped when the render cache is + * flushed/invalidated. As we always have to emit invalidations + * and flushes when moving into and out of the RENDER domain, correct + * snooping behaviour occurs naturally as the result of our domain + * tracking. + */ + if (obj->cache_level != I915_CACHE_NONE) + return; + trace_i915_gem_object_clflush(obj); drm_clflush_pages(obj->pages, obj->base.size / PAGE_SIZE); |