drm/i915/skl: Implement WaDisableLSQCROPERFforOCL

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b610764..0fb6a4f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5259,6 +5259,9 @@
 #define GEN7_L3SQCREG4				0xb034
 #define  L3SQ_URB_READ_CAM_MATCH_DISABLE	(1<<27)
 
+#define GEN8_L3SQCREG4				0xb118
+#define  GEN8_LQSC_RO_PERF_DIS			(1<<27)
+
 /* GEN8 chicken */
 #define HDC_CHICKEN0				0x7300
 #define  HDC_FENCE_DEST_SLM_DISABLE		(1<<14)