[PATCH v2 02/16] perf mem-events: Expose PMU init and name formatting helpers

[Ian Rogers <irogers@google.com>]

Export perf_pmu__mem_events_init_pmu() and perf_pmu__mem_events_name()
so callers can initialize and format per-PMU memory profiling events.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/mem-events.c | 12 ++++++------
 tools/perf/util/mem-events.h | 20 ++++++++++++++++++++
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 62543df0dca1..932efcfd82f7 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -82,12 +82,12 @@ int perf_pmu__mem_events_num_mem_pmus(struct perf_pmu *pmu)
 	return num;
 }
 
-static const char *perf_pmu__mem_events_name(struct perf_pmu *pmu, int i,
-					     char *buf, size_t buf_size)
+const char *perf_pmu__mem_events_name(struct perf_pmu *pmu, int i,
+				      char *buf, size_t buf_size)
 {
 	struct perf_mem_event *e;
 
-	if (i >= PERF_MEM_EVENTS__MAX || !pmu)
+	if (i >= PERF_MEM_EVENTS__MAX || !pmu || !pmu->mem_events)
 		return NULL;
 
 	e = &pmu->mem_events[i];
@@ -196,13 +196,13 @@ static bool perf_pmu__mem_events_supported(const char *mnt, struct perf_pmu *pmu
 	return !stat(path, &st);
 }
 
-static int __perf_pmu__mem_events_init(struct perf_pmu *pmu)
+int perf_pmu__mem_events_init_pmu(struct perf_pmu *pmu)
 {
 	const char *mnt = sysfs__mount();
 	bool found = false;
 	int j;
 
-	if (!mnt)
+	if (!mnt || !pmu || pmu->from_env || !pmu->mem_events)
 		return -ENOENT;
 
 	for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
@@ -228,7 +228,7 @@ int perf_pmu__mem_events_init(void)
 	struct perf_pmu *pmu = NULL;
 
 	while ((pmu = perf_pmus__scan_mem(pmu)) != NULL) {
-		if (__perf_pmu__mem_events_init(pmu))
+		if (perf_pmu__mem_events_init_pmu(pmu))
 			return -ENOENT;
 	}
 
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index 38b14c03392c..f2e622a048c8 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -31,8 +31,28 @@ extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
 extern bool perf_mem_record[PERF_MEM_EVENTS__MAX];
 
 int perf_pmu__mem_events_parse(struct perf_pmu *pmu, const char *str);
+
+/**
+ * perf_pmu__mem_events_init_pmu() - Initialize memory event table for @pmu.
+ * @pmu: The PMU to check for memory event support.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int perf_pmu__mem_events_init_pmu(struct perf_pmu *pmu);
 int perf_pmu__mem_events_init(void);
 
+/**
+ * perf_pmu__mem_events_name() - Format the event string for a memory event.
+ * @pmu: The PMU providing the memory event.
+ * @i: Memory event index (PERF_MEM_EVENTS__LOAD, etc.).
+ * @buf: Output buffer to format the event string into.
+ * @buf_size: Size of @buf in bytes.
+ *
+ * Return: Pointer to @buf on success, or NULL if invalid/unsupported.
+ */
+const char *perf_pmu__mem_events_name(struct perf_pmu *pmu, int i,
+				      char *buf, size_t buf_size);
+
 struct perf_mem_event *perf_pmu__mem_events_ptr(struct perf_pmu *pmu, int i);
 struct perf_pmu *perf_mem_events_find_pmu(void);
 int perf_pmu__mem_events_num_mem_pmus(struct perf_pmu *pmu);
-- 
2.56.1.703.gf848ed807c-goog