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