[RFC PATCH v2 1/3] perf/core: Expose perf_event_{en,dis}able_local()

[Xiaoyao Li]

KVM needs them to disable/enable an Intel PT perf event before
vm-entry/after vm-exit.

Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
---
 include/linux/perf_event.h | 1 +
 kernel/events/core.c       | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index ee8b9ecdc03b..fc5f3952d6a2 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1472,6 +1472,7 @@ extern int perf_swevent_get_recursion_context(void);
 extern void perf_swevent_put_recursion_context(int rctx);
 extern u64 perf_swevent_set_period(struct perf_event *event);
 extern void perf_event_enable(struct perf_event *event);
+extern void perf_event_enable_local(struct perf_event *event);
 extern void perf_event_disable(struct perf_event *event);
 extern void perf_event_disable_local(struct perf_event *event);
 extern void perf_event_disable_inatomic(struct perf_event *event);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2621fd24ad26..8324bb99c6bf 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2446,6 +2446,7 @@ void perf_event_disable_local(struct perf_event *event)
 {
 	event_function_local(event, __perf_event_disable, NULL);
 }
+EXPORT_SYMBOL_GPL(perf_event_disable_local);
 
 /*
  * Strictly speaking kernel users cannot create groups and therefore this
@@ -2984,6 +2985,12 @@ static void _perf_event_enable(struct perf_event *event)
 	event_function_call(event, __perf_event_enable, NULL);
 }
 
+void perf_event_enable_local(struct perf_event *event)
+{
+	event_function_local(event, __perf_event_enable, NULL);
+}
+EXPORT_SYMBOL_GPL(perf_event_enable_local);
+
 /*
  * See perf_event_disable();
  */
-- 
2.27.0