1 files changed, 96 insertions, 0 deletions

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index d41caeb35cf6..44ef28302fc7 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -597,6 +597,7 @@ static struct perf_cpu_map *__pmu_cpumask(const char *path)
  * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
  * may have a "cpus" file.
  */
+#define SYS_TEMPLATE_ID	"./bus/event_source/devices/%s/identifier"
 #define CPUS_TEMPLATE_UNCORE	"%s/bus/event_source/devices/%s/cpumask"
 #define CPUS_TEMPLATE_CPU	"%s/bus/event_source/devices/%s/cpus"
 
@@ -635,6 +636,21 @@ static bool pmu_is_uncore(const char *name)
 	return file_available(path);
 }
 
+static char *pmu_id(const char *name)
+{
+	char path[PATH_MAX], *str;
+	size_t len;
+
+	snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name);
+
+	if (sysfs__read_str(path, &str, &len) < 0)
+		return NULL;
+
+	str[len - 1] = 0; /* remove line feed */
+
+	return str;
+}
+
 /*
  *  PMU CORE devices have different name other than cpu in sysfs on some
  *  platforms.
@@ -796,6 +812,83 @@ static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
 	pmu_add_cpu_aliases_map(head, pmu, map);
 }
 
+void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data)
+{
+	int i = 0;
+
+	while (1) {
+		struct pmu_sys_events *event_table;
+		int j = 0;
+
+		event_table = &pmu_sys_event_tables[i++];
+
+		if (!event_table->table)
+			break;
+
+		while (1) {
+			struct pmu_event *pe = &event_table->table[j++];
+			int ret;
+
+			if (!pe->name && !pe->metric_group && !pe->metric_name)
+				break;
+
+			ret = fn(pe, data);
+			if (ret)
+				break;
+		}
+	}
+}
+
+struct pmu_sys_event_iter_data {
+	struct list_head *head;
+	struct perf_pmu *pmu;
+};
+
+static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data)
+{
+	struct pmu_sys_event_iter_data *idata = data;
+	struct perf_pmu *pmu = idata->pmu;
+
+	if (!pe->name) {
+		if (pe->metric_group || pe->metric_name)
+			return 0;
+		return -EINVAL;
+	}
+
+	if (!pe->compat || !pe->pmu)
+		return 0;
+
+	if (!strcmp(pmu->id, pe->compat) &&
+	    pmu_uncore_alias_match(pe->pmu, pmu->name)) {
+		__perf_pmu__new_alias(idata->head, NULL,
+				      (char *)pe->name,
+				      (char *)pe->desc,
+				      (char *)pe->event,
+				      (char *)pe->long_desc,
+				      (char *)pe->topic,
+				      (char *)pe->unit,
+				      (char *)pe->perpkg,
+				      (char *)pe->metric_expr,
+				      (char *)pe->metric_name,
+				      (char *)pe->deprecated);
+	}
+
+	return 0;
+}
+
+static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu)
+{
+	struct pmu_sys_event_iter_data idata = {
+		.head = head,
+		.pmu = pmu,
+	};
+
+	if (!pmu->id)
+		return;
+
+	pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata);
+}
+
 struct perf_event_attr * __weak
 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
 {
@@ -847,8 +940,11 @@ static struct perf_pmu *pmu_lookup(const char *name)
 	pmu->name = strdup(name);
 	pmu->type = type;
 	pmu->is_uncore = pmu_is_uncore(name);
+	if (pmu->is_uncore)
+		pmu->id = pmu_id(name);
 	pmu->max_precise = pmu_max_precise(name);
 	pmu_add_cpu_aliases(&aliases, pmu);
+	pmu_add_sys_aliases(&aliases, pmu);
 
 	INIT_LIST_HEAD(&pmu->format);
 	INIT_LIST_HEAD(&pmu->aliases);