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| author | Leo Yan <leo.yan@arm.com> | 2025-04-01 19:07:03 +0100 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2025-05-14 11:56:17 +0100 |
| commit | 5fa96c83b81e50833274f3b450ee9a8c0b2172bc (patch) | |
| tree | 918c80215d6eb892729c38e8c3da98b863e99583 /drivers/hwtracing | |
| parent | coresight: etm4x: Extract the trace unit controlling (diff) | |
| download | linux-5fa96c83b81e50833274f3b450ee9a8c0b2172bc.tar.gz linux-5fa96c83b81e50833274f3b450ee9a8c0b2172bc.zip | |
coresight: Introduce pause and resume APIs for source
Introduce APIs for pausing and resuming trace source and export as GPL
symbols.
Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250401180708.385396-3-leo.yan@arm.com
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-core.c | 22 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-priv.h | 2 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 5632bcb8feb6..fa758cc21827 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -392,6 +392,28 @@ 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 diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index ce91e0fbb497..33e22b1ba043 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -251,5 +251,7 @@ 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 |