2 files changed, 20 insertions, 0 deletions
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index e7a67260940c..7067b70c6f61 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -37,5 +37,7 @@ struct perf_mmap_param {
 size_t perf_mmap__mmap_len(struct perf_mmap *map);
 
 void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+		    int fd, int cpu);
 
 #endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index cc4284da4d99..b216a7db857f 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <sys/mman.h>
 #include <internal/mmap.h>
 #include <internal/lib.h>
 
@@ -13,3 +14,20 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map)
 {
 	return map->mask + 1 + page_size;
 }
+
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+		    int fd, int cpu)
+{
+	map->prev = 0;
+	map->mask = mp->mask;
+	map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
+			 MAP_SHARED, fd, 0);
+	if (map->base == MAP_FAILED) {
+		map->base = NULL;
+		return -1;
+	}
+
+	map->fd  = fd;
+	map->cpu = cpu;
+	return 0;
+}