1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __LIBPERF_INTERNAL_EVSEL_H
 3#define __LIBPERF_INTERNAL_EVSEL_H
 4
 5#include <linux/types.h>
 6#include <linux/perf_event.h>
 7#include <stdbool.h>
 8#include <sys/types.h>
 9
10struct perf_cpu_map;
11struct perf_thread_map;
12struct xyarray;
13
14/*
15 * Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
16 * more than one entry in the evlist.
17 */
18struct perf_sample_id {
19	struct hlist_node	 node;
20	u64			 id;
21	struct perf_evsel	*evsel;
22       /*
23	* 'idx' will be used for AUX area sampling. A sample will have AUX area
24	* data that will be queued for decoding, where there are separate
25	* queues for each CPU (per-cpu tracing) or task (per-thread tracing).
26	* The sample ID can be used to lookup 'idx' which is effectively the
27	* queue number.
28	*/
29	int			 idx;
30	int			 cpu;
31	pid_t			 tid;
32
33	/* Holds total ID period value for PERF_SAMPLE_READ processing. */
34	u64			 period;
35};
36
37struct perf_evsel {
38	struct list_head	 node;
39	struct perf_event_attr	 attr;
40	struct perf_cpu_map	*cpus;
41	struct perf_cpu_map	*own_cpus;
42	struct perf_thread_map	*threads;
43	struct xyarray		*fd;
44	struct xyarray		*sample_id;
45	u64			*id;
46	u32			 ids;
47
48	/* parse modifier helper */
49	int			 nr_members;
50	bool			 system_wide;
51};
52
53int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
54void perf_evsel__close_fd(struct perf_evsel *evsel);
55void perf_evsel__free_fd(struct perf_evsel *evsel);
56int perf_evsel__read_size(struct perf_evsel *evsel);
57int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter);
58
59int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
60void perf_evsel__free_id(struct perf_evsel *evsel);
61
62#endif /* __LIBPERF_INTERNAL_EVSEL_H */