1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LIBPERF_INTERNAL_CPUMAP_H
3 #define __LIBPERF_INTERNAL_CPUMAP_H
4
5 #include <linux/refcount.h>
6 #include <perf/cpumap.h>
7 #include <internal/rc_check.h>
8
9 /**
10 * A sized, reference counted, sorted array of integers representing CPU
11 * numbers. This is commonly used to capture which CPUs a PMU is associated
12 * with. The indices into the cpumap are frequently used as they avoid having
13 * gaps if CPU numbers were used. For events associated with a pid, rather than
14 * a CPU, a single dummy map with an entry of -1 is used.
15 */
16 DECLARE_RC_STRUCT(perf_cpu_map) {
17 refcount_t refcnt;
18 /** Length of the map array. */
19 int nr;
20 /** The CPU values. */
21 struct perf_cpu map[];
22 };
23
24 #ifndef MAX_NR_CPUS
25 #define MAX_NR_CPUS 2048
26 #endif
27
28 struct perf_cpu_map *perf_cpu_map__alloc(int nr_cpus);
29 int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu);
30 bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b);
31
32 void perf_cpu_map__set_nr(struct perf_cpu_map *map, int nr_cpus);
33
34 static inline refcount_t *perf_cpu_map__refcnt(struct perf_cpu_map *map)
35 {
36 return &RC_CHK_ACCESS(map)->refcnt;
37 }
38 #endif /* __LIBPERF_INTERNAL_CPUMAP_H */
39
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