diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 4b1161dcb15c62ed6f02710fcfcda107d8f8333f..900ffd044db80049c47d0e976e59d406466de0c7 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -189,8 +189,15 @@ i915_gem_alloc_context_obj(struct drm_device *dev, size_t size) * shouldn't touch the cache level, especially as that * would make the object snooped which might have a * negative performance impact. + * + * Snooping is required on non-llc platforms in execlist + * mode, but since all GGTT accesses use PAT entry 0 we + * get snooping anyway regardless of cache_level. + * + * This is only applicable for Ivy Bridge devices since + * later platforms don't have L3 control bits in the PTE. */ - if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev)) { + if (IS_IVYBRIDGE(dev)) { ret = i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC); /* Failure shouldn't ever happen this early */ if (WARN_ON(ret)) {