perf pmu-events: Avoid passing pmu_events_map

Preparation for hiding pmu_events_map as an implementation detail. While
the map is passed, the table of events is all that is normally wanted.

While modifying the function's types, rename pmu_events_map__find to
pmu_events_table__find to match later encapsulation. Similarly rename
pmu_add_cpu_aliases_map to pmu_add_cpu_aliases_table.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220812230949.683239-7-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/arm64/util/pmu.c

@@ -3,7 +3,7 @@
 #include "../../../util/cpumap.h"
 #include "../../../util/pmu.h"
 
-const struct pmu_events_map *pmu_events_map__find(void)
+const struct pmu_event *pmu_events_table__find(void)
 {
 	struct perf_pmu *pmu = NULL;
 
@@ -18,7 +18,7 @@ const struct pmu_events_map *pmu_events_map__find(void)
 		if (pmu->cpus->nr != cpu__max_cpu().cpu)
 			return NULL;
 
-		return perf_pmu__find_map(pmu);
+		return perf_pmu__find_table(pmu);
 	}
 
 	return NULL;

tools/perf/tests/expand-cgroup.c

@@ -195,16 +195,12 @@ static int expand_metric_events(void)
 			.metric_name	= NULL,
 		},
 	};
-	const struct pmu_events_map ev_map = {
-		.cpuid		= "test",
-		.table		= pme_test,
-	};
 
 	evlist = evlist__new();
 	TEST_ASSERT_VAL("failed to get evlist", evlist);
 
 	rblist__init(&metric_events);
-	ret = metricgroup__parse_groups_test(evlist, &ev_map, metric_str,
+	ret = metricgroup__parse_groups_test(evlist, pme_test, metric_str,
 					     false, false, &metric_events);
 	if (ret < 0) {
 		pr_debug("failed to parse '%s' metric\n", metric_str);

tools/perf/tests/parse-metric.c

@@ -79,11 +79,6 @@ static struct pmu_event pme_test[] = {
 }
 };
 
-static const struct pmu_events_map map = {
-	.cpuid		= "test",
-	.table		= pme_test,
-};
-
 struct value {
 	const char	*event;
 	u64		 val;
@@ -166,7 +161,7 @@ static int __compute_metric(const char *name, struct value *vals,
 	runtime_stat__init(&st);
 
 	/* Parse the metric into metric_events list. */
-	err = metricgroup__parse_groups_test(evlist, &map, name,
+	err = metricgroup__parse_groups_test(evlist, pme_test, name,
 					     false, false,
 					     &metric_events);
 	if (err)

tools/perf/tests/pmu-events.c

@@ -272,13 +272,11 @@ static bool is_same(const char *reference, const char *test)
 	return !strcmp(reference, test);
 }
 
-static const struct pmu_events_map *__test_pmu_get_events_map(void)
+static const struct pmu_event *__test_pmu_get_events_table(void)
 {
-	const struct pmu_events_map *map;
-
-	for (map = &pmu_events_map[0]; map->cpuid; map++) {
+	for (const struct pmu_events_map *map = &pmu_events_map[0]; map->cpuid; map++) {
 		if (!strcmp(map->cpuid, "testcpu"))
-			return map;
+			return map->table;
 	}
 
 	pr_err("could not find test events map\n");
@@ -440,8 +438,7 @@ static int test__pmu_event_table(struct test_suite *test __maybe_unused,
 				 int subtest __maybe_unused)
 {
 	const struct pmu_event *sys_event_tables = find_sys_events_table("pme_test_soc_sys");
-	const struct pmu_events_map *map = __test_pmu_get_events_map();
-	const struct pmu_event *table;
+	const struct pmu_event *table = __test_pmu_get_events_table();
 	int map_events = 0, expected_events;
 
 	/* ignore 3x sentinels */
@@ -449,10 +446,10 @@ static int test__pmu_event_table(struct test_suite *test __maybe_unused,
 			  ARRAY_SIZE(uncore_events) +
 			  ARRAY_SIZE(sys_events) - 3;
 
-	if (!map || !sys_event_tables)
+	if (!table || !sys_event_tables)
 		return -1;
 
-	for (table = map->table; table->name; table++) {
+	for (; table->name; table++) {
 		struct perf_pmu_test_event const **test_event_table;
 		bool found = false;
 
@@ -537,10 +534,10 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count)
 	struct perf_pmu *pmu;
 	LIST_HEAD(aliases);
 	int res = 0;
-	const struct pmu_events_map *map = __test_pmu_get_events_map();
+	const struct pmu_event *table = __test_pmu_get_events_table();
 	struct perf_pmu_alias *a, *tmp;
 
-	if (!map)
+	if (!table)
 		return -1;
 
 	test_event_table = &core_events[0];
@@ -551,7 +548,7 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count)
 
 	pmu->name = pmu_name;
 
-	pmu_add_cpu_aliases_map(&aliases, pmu, map);
+	pmu_add_cpu_aliases_table(&aliases, pmu, table);
 
 	for (; *test_event_table; test_event_table++) {
 		struct perf_pmu_test_event const *test_event = *test_event_table;
@@ -590,14 +587,14 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
 	struct perf_pmu *pmu = &test_pmu->pmu;
 	const char *pmu_name = pmu->name;
 	struct perf_pmu_alias *a, *tmp, *alias;
-	const struct pmu_events_map *map;
+	const struct pmu_event *events_table;
 	LIST_HEAD(aliases);
 	int res = 0;
 
-	map = __test_pmu_get_events_map();
-	if (!map)
+	events_table = __test_pmu_get_events_table();
+	if (!events_table)
 		return -1;
-	pmu_add_cpu_aliases_map(&aliases, pmu, map);
+	pmu_add_cpu_aliases_table(&aliases, pmu, events_table);
 	pmu_add_sys_aliases(&aliases, pmu);
 
 	/* Count how many aliases we generated */
@@ -848,13 +845,9 @@ static int check_parse_fake(const char *id)
 	return ret;
 }
 
-static void expr_failure(const char *msg,
-			 const struct pmu_events_map *map,
-			 const struct pmu_event *pe)
+static void expr_failure(const char *msg, const struct pmu_event *pe)
 {
-	pr_debug("%s for map %s %s\n", msg, map->arch, map->cpuid);
-	pr_debug("On metric %s\n", pe->metric_name);
-	pr_debug("On expression %s\n", pe->metric_expr);
+	pr_debug("%s\nOn metric %s\nOn expression %s\n", msg, pe->metric_name, pe->metric_expr);
 }
 
 struct metric {
@@ -864,7 +857,7 @@ struct metric {
 
 static int resolve_metric_simple(struct expr_parse_ctx *pctx,
 				 struct list_head *compound_list,
-				 const struct pmu_events_map *map,
+				 const struct pmu_event *map,
 				 const char *metric_name)
 {
 	struct hashmap_entry *cur, *cur_tmp;
@@ -925,8 +918,7 @@ static int resolve_metric_simple(struct expr_parse_ctx *pctx,
 static int test__parsing(struct test_suite *test __maybe_unused,
 			 int subtest __maybe_unused)
 {
-	const struct pmu_events_map *cpus_map = pmu_events_map__find();
-	const struct pmu_events_map *map;
+	const struct pmu_event *cpus_table = pmu_events_table__find();
 	const struct pmu_event *pe;
 	int i, j, k;
 	int ret = 0;
@@ -940,7 +932,8 @@ static int test__parsing(struct test_suite *test __maybe_unused,
 	}
 	i = 0;
 	for (;;) {
-		map = &pmu_events_map[i++];
+		const struct pmu_events_map *map = &pmu_events_map[i++];
+
 		if (!map->table)
 			break;
 		j = 0;
@@ -957,14 +950,14 @@ static int test__parsing(struct test_suite *test __maybe_unused,
 				continue;
 			expr__ctx_clear(ctx);
 			if (expr__find_ids(pe->metric_expr, NULL, ctx) < 0) {
-				expr_failure("Parse find ids failed", map, pe);
+				expr_failure("Parse find ids failed", pe);
 				ret++;
 				continue;
 			}
 
-			if (resolve_metric_simple(ctx, &compound_list, map,
+			if (resolve_metric_simple(ctx, &compound_list, map->table,
 						  pe->metric_name)) {
-				expr_failure("Could not resolve metrics", map, pe);
+				expr_failure("Could not resolve metrics", pe);
 				ret++;
 				goto exit; /* Don't tolerate errors due to severity */
 			}
@@ -979,7 +972,7 @@ static int test__parsing(struct test_suite *test __maybe_unused,
 				expr__add_id_val(ctx, strdup(cur->key), k++);
 
 			hashmap__for_each_entry(ctx->ids, cur, bkt) {
-				if (check_parse_cpu(cur->key, map == cpus_map,
+				if (check_parse_cpu(cur->key, map->table == cpus_table,
 						   pe))
 					ret++;
 			}
@@ -999,7 +992,7 @@ static int test__parsing(struct test_suite *test __maybe_unused,
 				hashmap__for_each_entry(ctx->ids, cur, bkt)
 					expr__add_id_val(ctx, strdup(cur->key), k--);
 				if (expr__parse(&result, ctx, pe->metric_expr)) {
-					expr_failure("Parse failed", map, pe);
+					expr_failure("Parse failed", pe);
 					ret++;
 				}
 			}
@@ -1088,8 +1081,6 @@ static int metric_parse_fake(const char *str)
 static int test__parsing_fake(struct test_suite *test __maybe_unused,
 			      int subtest __maybe_unused)
 {
-	const struct pmu_events_map *map;
-	const struct pmu_event *pe;
 	unsigned int i, j;
 	int err = 0;
 
@@ -1101,12 +1092,14 @@ static int test__parsing_fake(struct test_suite *test __maybe_unused,
 
 	i = 0;
 	for (;;) {
-		map = &pmu_events_map[i++];
+		const struct pmu_events_map *map = &pmu_events_map[i++];
+
 		if (!map->table)
 			break;
 		j = 0;
 		for (;;) {
-			pe = &map->table[j++];
+			const struct pmu_event *pe = &map->table[j++];
+
 			if (!pe->name && !pe->metric_group && !pe->metric_name)
 				break;
 			if (!pe->metric_expr)

tools/perf/util/metricgroup.h

@@ -71,9 +71,9 @@ int metricgroup__parse_groups(const struct option *opt,
 			      bool metric_no_merge,
 			      struct rblist *metric_events);
 const struct pmu_event *metricgroup__find_metric(const char *metric,
-						 const struct pmu_events_map *map);
+						 const struct pmu_event *table);
 int metricgroup__parse_groups_test(struct evlist *evlist,
-				   const struct pmu_events_map *map,
+				   const struct pmu_event *table,
 				   const char *str,
 				   bool metric_no_group,
 				   bool metric_no_merge,

tools/perf/util/pmu.c

@@ -710,9 +710,9 @@ static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
 	return cpuid;
 }
 
-const struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
+const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu)
 {
-	const struct pmu_events_map *map;
+	const struct pmu_event *table = NULL;
 	char *cpuid = perf_pmu__getcpuid(pmu);
 	int i;
 
@@ -724,22 +724,23 @@ const struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
 
 	i = 0;
 	for (;;) {
-		map = &pmu_events_map[i++];
-		if (!map->table) {
-			map = NULL;
+		const struct pmu_events_map *map = &pmu_events_map[i++];
+
+		if (!map->table)
 			break;
-		}
 
-		if (!strcmp_cpuid_str(map->cpuid, cpuid))
+		if (!strcmp_cpuid_str(map->cpuid, cpuid)) {
+			table = map->table;
 			break;
+		}
 	}
 	free(cpuid);
-	return map;
+	return table;
 }
 
-const struct pmu_events_map *__weak pmu_events_map__find(void)
+__weak const struct pmu_event *pmu_events_table__find(void)
 {
-	return perf_pmu__find_map(NULL);
+	return perf_pmu__find_table(NULL);
 }
 
 /*
@@ -823,8 +824,8 @@ bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
  * to the current running CPU. Then, add all PMU events from that table
  * as aliases.
  */
-void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
-			     const struct pmu_events_map *map)
+void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
+			       const struct pmu_event *table)
 {
 	int i;
 	const char *name = pmu->name;
@@ -834,7 +835,7 @@ void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
 	i = 0;
 	while (1) {
 		const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu";
-		const struct pmu_event *pe = &map->table[i++];
+		const struct pmu_event *pe = &table[i++];
 		const char *pname = pe->pmu ? pe->pmu : cpu_name;
 
 		if (!pe->name) {
@@ -859,13 +860,13 @@ void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
 
 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
 {
-	const struct pmu_events_map *map;
+	const struct pmu_event *table;
 
-	map = perf_pmu__find_map(pmu);
-	if (!map)
+	table = perf_pmu__find_table(pmu);
+	if (!table)
 		return;
 
-	pmu_add_cpu_aliases_map(head, pmu, map);
+	pmu_add_cpu_aliases_table(head, pmu, table);
 }
 
 struct pmu_sys_event_iter_data {

tools/perf/util/pmu.h

@@ -125,11 +125,11 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
 int perf_pmu__test(void);
 
 struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
-void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
-			     const struct pmu_events_map *map);
+void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
+			       const struct pmu_event *table);
 
-const struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu);
-const struct pmu_events_map *pmu_events_map__find(void);
+const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu);
+const struct pmu_event *pmu_events_table__find(void);
 bool pmu_uncore_alias_match(const char *pmu_name, const char *name);
 void perf_pmu_free_alias(struct perf_pmu_alias *alias);
 

tools/perf/util/s390-sample-raw.c

@@ -135,12 +135,12 @@ static int get_counterset_start(int setnr)
  * the name of this counter.
  * If no match is found a NULL pointer is returned.
  */
-static const char *get_counter_name(int set, int nr, const struct pmu_events_map *map)
+static const char *get_counter_name(int set, int nr, const struct pmu_event *table)
 {
 	int rc, event_nr, wanted = get_counterset_start(set) + nr;
 
-	if (map) {
-		const struct pmu_event *evp = map->table;
+	if (table) {
+		const struct pmu_event *evp = table;
 
 		for (; evp->name || evp->event || evp->desc; ++evp) {
 			if (evp->name == NULL || evp->event == NULL)
@@ -159,10 +159,10 @@ static void s390_cpumcfdg_dump(struct perf_sample *sample)
 	unsigned char *buf = sample->raw_data;
 	const char *color = PERF_COLOR_BLUE;
 	struct cf_ctrset_entry *cep, ce;
-	const struct pmu_events_map *map;
+	const struct pmu_event *table;
 	u64 *p;
 
-	map = pmu_events_map__find();
+	table = pmu_events_table__find();
 	while (offset < len) {
 		cep = (struct cf_ctrset_entry *)(buf + offset);
 
@@ -180,7 +180,7 @@ static void s390_cpumcfdg_dump(struct perf_sample *sample)
 		color_fprintf(stdout, color, "    [%#08zx] Counterset:%d"
 			      " Counters:%d\n", offset, ce.set, ce.ctr);
 		for (i = 0, p = (u64 *)(cep + 1); i < ce.ctr; ++i, ++p) {
-			const char *ev_name = get_counter_name(ce.set, i, map);
+			const char *ev_name = get_counter_name(ce.set, i, table);
 
 			color_fprintf(stdout, color,
 				      "\tCounter:%03d %s Value:%#018lx\n", i,