1// SPDX-License-Identifier: GPL-2.0-only
  2#include <errno.h>
  3#include <inttypes.h>
  4#include "cpumap.h"
  5#include "evlist.h"
  6#include "evsel.h"
  7#include "../perf.h"
  8#include "util/pmu-hybrid.h"
  9#include "util/evlist-hybrid.h"
 10#include "debug.h"
 11#include <unistd.h>
 12#include <stdlib.h>
 13#include <linux/err.h>
 14#include <linux/string.h>
 15#include <perf/evlist.h>
 16#include <perf/evsel.h>
 17#include <perf/cpumap.h>
 18
 19int evlist__add_default_hybrid(struct evlist *evlist, bool precise)
 20{
 21	struct evsel *evsel;
 22	struct perf_pmu *pmu;
 23	__u64 config;
 24	struct perf_cpu_map *cpus;
 25
 26	perf_pmu__for_each_hybrid_pmu(pmu) {
 27		config = PERF_COUNT_HW_CPU_CYCLES |
 28			 ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
 29		evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
 30					  config);
 31		if (!evsel)
 32			return -ENOMEM;
 33
 34		cpus = perf_cpu_map__get(pmu->cpus);
 35		evsel->core.cpus = cpus;
 36		evsel->core.own_cpus = perf_cpu_map__get(cpus);
 37		evsel->pmu_name = strdup(pmu->name);
 38		evlist__add(evlist, evsel);
 39	}
 40
 41	return 0;
 42}
 43
 44static bool group_hybrid_conflict(struct evsel *leader)
 45{
 46	struct evsel *pos, *prev = NULL;
 47
 48	for_each_group_evsel(pos, leader) {
 49		if (!evsel__is_hybrid(pos))
 50			continue;
 51
 52		if (prev && strcmp(prev->pmu_name, pos->pmu_name))
 53			return true;
 54
 55		prev = pos;
 56	}
 57
 58	return false;
 59}
 60
 61void evlist__warn_hybrid_group(struct evlist *evlist)
 62{
 63	struct evsel *evsel;
 64
 65	evlist__for_each_entry(evlist, evsel) {
 66		if (evsel__is_group_leader(evsel) &&
 67		    evsel->core.nr_members > 1 &&
 68		    group_hybrid_conflict(evsel)) {
 69			pr_warning("WARNING: events in group from "
 70				   "different hybrid PMUs!\n");
 71			return;
 72		}
 73	}
 74}
 75
 76bool evlist__has_hybrid(struct evlist *evlist)
 77{
 78	struct evsel *evsel;
 79
 80	evlist__for_each_entry(evlist, evsel) {
 81		if (evsel->pmu_name &&
 82		    perf_pmu__is_hybrid(evsel->pmu_name)) {
 83			return true;
 84		}
 85	}
 86
 87	return false;
 88}
 89
 90int evlist__fix_hybrid_cpus(struct evlist *evlist, const char *cpu_list)
 91{
 92	struct perf_cpu_map *cpus;
 93	struct evsel *evsel, *tmp;
 94	struct perf_pmu *pmu;
 95	int ret, unmatched_count = 0, events_nr = 0;
 96
 97	if (!perf_pmu__has_hybrid() || !cpu_list)
 98		return 0;
 99
100	cpus = perf_cpu_map__new(cpu_list);
101	if (!cpus)
102		return -1;
103
104	/*
105	 * The evsels are created with hybrid pmu's cpus. But now we
106	 * need to check and adjust the cpus of evsel by cpu_list because
107	 * cpu_list may cause conflicts with cpus of evsel. For example,
108	 * cpus of evsel is cpu0-7, but the cpu_list is cpu6-8, we need
109	 * to adjust the cpus of evsel to cpu6-7. And then propatate maps
110	 * in evlist__create_maps().
111	 */
112	evlist__for_each_entry_safe(evlist, tmp, evsel) {
113		struct perf_cpu_map *matched_cpus, *unmatched_cpus;
114		char buf1[128], buf2[128];
115
116		pmu = perf_pmu__find_hybrid_pmu(evsel->pmu_name);
117		if (!pmu)
118			continue;
119
120		ret = perf_pmu__cpus_match(pmu, cpus, &matched_cpus,
121					   &unmatched_cpus);
122		if (ret)
123			goto out;
124
125		events_nr++;
126
127		if (perf_cpu_map__nr(matched_cpus) > 0 &&
128		    (perf_cpu_map__nr(unmatched_cpus) > 0 ||
129		     perf_cpu_map__nr(matched_cpus) < perf_cpu_map__nr(cpus) ||
130		     perf_cpu_map__nr(matched_cpus) < perf_cpu_map__nr(pmu->cpus))) {
131			perf_cpu_map__put(evsel->core.cpus);
132			perf_cpu_map__put(evsel->core.own_cpus);
133			evsel->core.cpus = perf_cpu_map__get(matched_cpus);
134			evsel->core.own_cpus = perf_cpu_map__get(matched_cpus);
135
136			if (perf_cpu_map__nr(unmatched_cpus) > 0) {
137				cpu_map__snprint(matched_cpus, buf1, sizeof(buf1));
138				pr_warning("WARNING: use %s in '%s' for '%s', skip other cpus in list.\n",
139					   buf1, pmu->name, evsel->name);
140			}
141		}
142
143		if (perf_cpu_map__nr(matched_cpus) == 0) {
144			evlist__remove(evlist, evsel);
145			evsel__delete(evsel);
146
147			cpu_map__snprint(cpus, buf1, sizeof(buf1));
148			cpu_map__snprint(pmu->cpus, buf2, sizeof(buf2));
149			pr_warning("WARNING: %s isn't a '%s', please use a CPU list in the '%s' range (%s)\n",
150				   buf1, pmu->name, pmu->name, buf2);
151			unmatched_count++;
152		}
153
154		perf_cpu_map__put(matched_cpus);
155		perf_cpu_map__put(unmatched_cpus);
156	}
157	if (events_nr)
158		ret = (unmatched_count == events_nr) ? -1 : 0;
159out:
160	perf_cpu_map__put(cpus);
161	return ret;
162}