1 files changed, 32 insertions, 0 deletions
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
new file mode 100644
index 000000000000..ba1e519c15b9
--- /dev/null
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_INTERNAL_MMAP_H
+#define __LIBPERF_INTERNAL_MMAP_H
+
+#include <linux/compiler.h>
+#include <linux/refcount.h>
+#include <linux/types.h>
+#include <stdbool.h>
+
+/* perf sample has 16 bits size limit */
+#define PERF_SAMPLE_MAX_SIZE (1 << 16)
+
+/**
+ * struct perf_mmap - perf's ring buffer mmap details
+ *
+ * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
+ */
+struct perf_mmap {
+	void		*base;
+	int		 mask;
+	int		 fd;
+	int		 cpu;
+	refcount_t	 refcnt;
+	u64		 prev;
+	u64		 start;
+	u64		 end;
+	bool		 overwrite;
+	u64		 flush;
+	char		 event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
+};
+
+#endif /* __LIBPERF_INTERNAL_MMAP_H */