3 files changed, 31 insertions, 7 deletions

diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 9a7df8d01296..21ebe0f47e64 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -87,14 +87,26 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 
 	rec_argv[i++] = "record";
 
-	if (mem->operation & MEM_OPERATION_LOAD) {
-		e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
-		e->record = true;
-	}
+	e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD_STORE);
 
-	if (mem->operation & MEM_OPERATION_STORE) {
-		e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE);
+	/*
+	 * The load and store operations are required, use the event
+	 * PERF_MEM_EVENTS__LOAD_STORE if it is supported.
+	 */
+	if (e->tag &&
+	    (mem->operation & MEM_OPERATION_LOAD) &&
+	    (mem->operation & MEM_OPERATION_STORE)) {
 		e->record = true;
+	} else {
+		if (mem->operation & MEM_OPERATION_LOAD) {
+			e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
+			e->record = true;
+		}
+
+		if (mem->operation & MEM_OPERATION_STORE) {
+			e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE);
+			e->record = true;
+		}
 	}
 
 	e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 7a5a0d699e27..19007e463b8a 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -20,6 +20,7 @@ unsigned int perf_mem_events__loads_ldlat = 30;
 static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
 	E("ldlat-loads",	"cpu/mem-loads,ldlat=%u/P",	"cpu/events/mem-loads"),
 	E("ldlat-stores",	"cpu/mem-stores/P",		"cpu/events/mem-stores"),
+	E(NULL,			NULL,				NULL),
 };
 #undef E
 
@@ -75,6 +76,9 @@ int perf_mem_events__parse(const char *str)
 		for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
 			struct perf_mem_event *e = perf_mem_events__ptr(j);
 
+			if (!e->tag)
+				continue;
+
 			if (strstr(e->tag, tok))
 				e->record = found = true;
 		}
@@ -105,6 +109,13 @@ int perf_mem_events__init(void)
 		struct perf_mem_event *e = perf_mem_events__ptr(j);
 		struct stat st;
 
+		/*
+		 * If the event entry isn't valid, skip initialization
+		 * and "e->supported" will keep false.
+		 */
+		if (!e->tag)
+			continue;
+
 		scnprintf(path, PATH_MAX, "%s/devices/%s",
 			  mnt, e->sysfs_name);
 
@@ -123,7 +134,7 @@ void perf_mem_events__list(void)
 		struct perf_mem_event *e = perf_mem_events__ptr(j);
 
 		fprintf(stderr, "%-13s%-*s%s\n",
-			e->tag,
+			e->tag ?: "",
 			verbose > 0 ? 25 : 0,
 			verbose > 0 ? perf_mem_events__name(j) : "",
 			e->supported ? ": available" : "");
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index 726a9c8103e4..5ef178278909 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -28,6 +28,7 @@ struct mem_info {
 enum {
 	PERF_MEM_EVENTS__LOAD,
 	PERF_MEM_EVENTS__STORE,
+	PERF_MEM_EVENTS__LOAD_STORE,
 	PERF_MEM_EVENTS__MAX,
 };