diff --git a/services/std_svc/sdei/sdei_event.c b/services/std_svc/sdei/sdei_event.c
index 0b608e1..e0c7971 100644
--- a/services/std_svc/sdei/sdei_event.c
+++ b/services/std_svc/sdei/sdei_event.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -99,3 +99,24 @@
 
 	return NULL;
 }
+
+/*
+ * Return the total number of currently registered SDEI events.
+ */
+int sdei_get_registered_event_count(void)
+{
+	const sdei_mapping_t *mapping;
+	sdei_ev_map_t *map;
+	unsigned int i;
+	unsigned int j;
+	int count = 0;
+
+	/* Add up reg counts for each mapping. */
+	for_each_mapping_type(i, mapping) {
+		iterate_mapping(mapping, j, map) {
+			count += map->reg_count;
+		}
+	}
+
+	return count;
+}