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Subject[RFC PATCH v2 1/3] perf/core: Expose perf_event_{en,dis}able_local()
Date
KVM needs them to disable/enable an Intel PT perf event before
vm-entry/after vm-exit.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
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
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