diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 0b56e7383092384e2a767877b7ce07609b940395..33bdc13b81cb8bf2ae93298bb8f0d26fe39a064c 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -1101,10 +1101,11 @@ enum perf_callchain_context {
 /**
  * PERF_RECORD_AUX::flags bits
  */
-#define PERF_AUX_FLAG_TRUNCATED		0x01	/* record was truncated to fit */
-#define PERF_AUX_FLAG_OVERWRITE		0x02	/* snapshot from overwrite mode */
-#define PERF_AUX_FLAG_PARTIAL		0x04	/* record contains gaps */
-#define PERF_AUX_FLAG_COLLISION		0x08	/* sample collided with another */
+#define PERF_AUX_FLAG_TRUNCATED			0x01	/* record was truncated to fit */
+#define PERF_AUX_FLAG_OVERWRITE			0x02	/* snapshot from overwrite mode */
+#define PERF_AUX_FLAG_PARTIAL			0x04	/* record contains gaps */
+#define PERF_AUX_FLAG_COLLISION			0x08	/* sample collided with another */
+#define PERF_AUX_FLAG_PMU_FORMAT_TYPE_MASK	0xff00	/* PMU specific trace format type */
 
 /* CoreSight PMU AUX buffer formats */
 #define PERF_AUX_FLAG_CORESIGHT_FORMAT_CORESIGHT	0x0000 /* Default for backward compatibility */