@@ -367,6 +367,28 @@ void coresight_disable_source(struct coresight_device *csdev, void *data)
}
EXPORT_SYMBOL_GPL(coresight_disable_source);
+void coresight_pause_source(struct coresight_device *csdev)
+{
+ if (!coresight_is_percpu_source(csdev))
+ return;
+
+ if (source_ops(csdev)->pause_perf)
+ source_ops(csdev)->pause_perf(csdev);
+}
+EXPORT_SYMBOL_GPL(coresight_pause_source);
+
+int coresight_resume_source(struct coresight_device *csdev)
+{
+ if (!coresight_is_percpu_source(csdev))
+ return -EOPNOTSUPP;
+
+ if (!source_ops(csdev)->resume_perf)
+ return -EOPNOTSUPP;
+
+ return source_ops(csdev)->resume_perf(csdev);
+}
+EXPORT_SYMBOL_GPL(coresight_resume_source);
+
/*
* coresight_disable_path_from : Disable components in the given path beyond
* @nd in the list. If @nd is NULL, all the components, except the SOURCE are
@@ -249,5 +249,7 @@ void coresight_add_helper(struct coresight_device *csdev,
void coresight_set_percpu_sink(int cpu, struct coresight_device *csdev);
struct coresight_device *coresight_get_percpu_sink(int cpu);
void coresight_disable_source(struct coresight_device *csdev, void *data);
+void coresight_pause_source(struct coresight_device *csdev);
+int coresight_resume_source(struct coresight_device *csdev);
#endif
@@ -398,6 +398,8 @@ struct coresight_ops_link {
* is associated to.
* @enable: enables tracing for a source.
* @disable: disables tracing for a source.
+ * @resume_perf: resumes tracing for a source in perf session.
+ * @pause_perf: pauses tracing for a source in perf session.
*/
struct coresight_ops_source {
int (*cpu_id)(struct coresight_device *csdev);
@@ -405,6 +407,8 @@ struct coresight_ops_source {
enum cs_mode mode, struct coresight_path *path);
void (*disable)(struct coresight_device *csdev,
struct perf_event *event);
+ int (*resume_perf)(struct coresight_device *csdev);
+ void (*pause_perf)(struct coresight_device *csdev);
};
/**
Introduce APIs for pausing and resuming trace source and export as GPL symbols. Signed-off-by: Leo Yan <leo.yan@arm.com> --- drivers/hwtracing/coresight/coresight-core.c | 22 ++++++++++++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 2 ++ include/linux/coresight.h | 4 ++++ 3 files changed, 28 insertions(+)