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#include <internal/cpumap.h>
10
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	struct perf_cpu		 cpu;
31	pid_t			 tid;
32
33	/* Guest machine pid and VCPU, valid only if machine_pid is non-zero */
34	pid_t			 machine_pid;
35	struct perf_cpu		 vcpu;
36
37	/* Holds total ID period value for PERF_SAMPLE_READ processing. */
38	u64			 period;
39};
40
41struct perf_evsel {
42	struct list_head	 node;
43	struct perf_event_attr	 attr;
44	/** The commonly used cpu map of CPUs the event should be opened upon, etc. */
45	struct perf_cpu_map	*cpus;
46	/**
47	 * The cpu map read from the PMU. For core PMUs this is the list of all
48	 * CPUs the event can be opened upon. For other PMUs this is the default
49	 * cpu map for opening the event on, for example, the first CPU on a
50	 * socket for an uncore event.
51	 */
52	struct perf_cpu_map	*own_cpus;
53	struct perf_thread_map	*threads;
54	struct xyarray		*fd;
55	struct xyarray		*mmap;
56	struct xyarray		*sample_id;
57	u64			*id;
58	u32			 ids;
59	struct perf_evsel	*leader;
60
61	/* parse modifier helper */
62	int			 nr_members;
63	/*
64	 * system_wide is for events that need to be on every CPU, irrespective
65	 * of user requested CPUs or threads. Tha main example of this is the
66	 * dummy event. Map propagation will set cpus for this event to all CPUs
67	 * as software PMU events like dummy, have a CPU map that is empty.
68	 */
69	bool			 system_wide;
70	/*
71	 * Some events, for example uncore events, require a CPU.
72	 * i.e. it cannot be the 'any CPU' value of -1.
73	 */
74	bool			 requires_cpu;
75	/** Is the PMU for the event a core one? Effects the handling of own_cpus. */
76	bool			 is_pmu_core;
77	int			 idx;
78};
79
80void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr,
81		      int idx);
82int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
83void perf_evsel__close_fd(struct perf_evsel *evsel);
84void perf_evsel__free_fd(struct perf_evsel *evsel);
85int perf_evsel__read_size(struct perf_evsel *evsel);
86int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter);
87
88int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
89void perf_evsel__free_id(struct perf_evsel *evsel);
90
91#endif /* __LIBPERF_INTERNAL_EVSEL_H */