diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 58ac6c7c690b0736bc025966cab6a1e57f48af5c..25e229b609a74f1ed5bd28e757ae09bb45b8765b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6090,6 +6090,7 @@ enum skl_disp_power_wells {
 
 #define GEN8_L3SQCREG1				_MMIO(0xB100)
 #define  BDW_WA_L3SQCREG1_DEFAULT		0x784000
+#define  BXT_WA_L3SQCREG1_DEFAULT		0xF84000
 
 #define GEN7_L3CNTLREG1				_MMIO(0xB01C)
 #define  GEN7_WA_FOR_GEN7_L3_CONTROL			0x3C47FF8C
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 245386e20c52dd2848c484d2a3ceb5fe7c6e1fa0..f6e8e7e69ad5504e012742f8ce3359c02254ceff 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1180,6 +1180,10 @@ static int bxt_init_workarounds(struct intel_engine_cs *engine)
 			return ret;
 	}
 
+	/* WaProgramL3SqcReg1DefaultForPerf:bxt */
+	if (IS_BXT_REVID(dev, BXT_REVID_B0, REVID_FOREVER))
+		I915_WRITE(GEN8_L3SQCREG1, BXT_WA_L3SQCREG1_DEFAULT);
+
 	return 0;
 }