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 | 20 ++++++++++++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 2 ++ include/linux/coresight.h | 4 ++++ 3 files changed, 26 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 0a9380350fb5..eb7b83a7bfa2 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -365,6 +365,26 @@ 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 (!csdev || !coresight_is_percpu_source(csdev)) + return; + + if (source_ops(csdev)->pause) + source_ops(csdev)->pause(csdev); +} +EXPORT_SYMBOL_GPL(coresight_pause_source); + +void coresight_resume_source(struct coresight_device *csdev) +{ + if (!csdev || !coresight_is_percpu_source(csdev)) + return; + + if (source_ops(csdev)->resume) + source_ops(csdev)->resume(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 diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 76403530f33e..a9f14c075e91 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -247,5 +247,7 @@ 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); +void coresight_resume_source(struct coresight_device *csdev);
#endif diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 17276965ff1d..703e1b8dbe22 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -385,6 +385,8 @@ struct coresight_ops_link { * is associated to. * @enable: enables tracing for a source. * @disable: disables tracing for a source. + * @resume: resumes tracing for a source. + * @pause: pauses tracing for a source. */ struct coresight_ops_source { int (*cpu_id)(struct coresight_device *csdev); @@ -392,6 +394,8 @@ struct coresight_ops_source { enum cs_mode mode, struct coresight_trace_id_map *id_map); void (*disable)(struct coresight_device *csdev, struct perf_event *event); + int (*resume)(struct coresight_device *csdev); + void (*pause)(struct coresight_device *csdev); };
/**