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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LIBPERF_INTERNAL_MMAP_H
3#define __LIBPERF_INTERNAL_MMAP_H
4
5#include <linux/compiler.h>
6#include <linux/refcount.h>
7#include <linux/types.h>
8#include <stdbool.h>
9
10/* perf sample has 16 bits size limit */
11#define PERF_SAMPLE_MAX_SIZE (1 << 16)
12
13/**
14 * struct perf_mmap - perf's ring buffer mmap details
15 *
16 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
17 */
18struct perf_mmap {
19 void *base;
20 int mask;
21 int fd;
22 int cpu;
23 refcount_t refcnt;
24 u64 prev;
25 u64 start;
26 u64 end;
27 bool overwrite;
28 u64 flush;
29 char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
30};
31
32#endif /* __LIBPERF_INTERNAL_MMAP_H */