diff options
| author | Leo Yan <leo.yan@linaro.org> | 2018-03-29 23:00:55 +0800 |
|---|---|---|
| committer | Leo Yan <leo.yan@linaro.org> | 2018-03-30 10:13:05 +0800 |
| commit | 1dfc95a8ad96a9b87c3d02346d4bd410fbb83559 (patch) | |
| tree | 07ee01c893c3be5f8580d10d798f9d4e55e5f72e | |
| parent | 81949a865018190dcae9eac5588534823099c3f9 (diff) | |
coresight: Set and clear sink device handler for kdump node
If Coresight path is enabled for specific CPU, the sink device handler
need to be set to kdump node; on the other hand we also need to clear
sink device handler when path is disabled.
This patch sets sink devices handler for kdump node for two separate
Coresight enabling modes: CS_MODE_SYSFS and CS_MODE_PERF; and clear the
handler when Coresight is disabled.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm-perf.c | 5 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight.c | 16 |
2 files changed, 19 insertions, 2 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 8a0ad77574e73..f8b159c37dd60 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -139,6 +139,8 @@ static void free_event_data(struct work_struct *work) for_each_cpu(cpu, mask) { if (!(IS_ERR_OR_NULL(event_data->path[cpu]))) coresight_release_path(event_data->path[cpu]); + + coresight_kdump_sink(cpu, NULL); } kfree(event_data->path); @@ -238,6 +240,9 @@ static void *etm_setup_aux(int event_cpu, void **pages, event_data->path[cpu] = coresight_build_path(csdev, sink); if (IS_ERR(event_data->path[cpu])) goto err; + + if (coresight_kdump_sink(cpu, sink)) + goto err; } if (!sink_ops(sink)->alloc_buffer) diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 389c4baeca9d2..483a1f78465f1 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -272,6 +272,7 @@ static int coresight_enable_source(struct coresight_device *csdev, u32 mode) static bool coresight_disable_source(struct coresight_device *csdev) { if (atomic_dec_return(csdev->refcnt) == 0) { + if (source_ops(csdev)->disable) source_ops(csdev)->disable(csdev, NULL); csdev->enable = false; @@ -612,6 +613,13 @@ int coresight_enable(struct coresight_device *csdev) if (ret) goto err_source; + cpu = source_ops(csdev)->cpu_id(csdev); + + /* Set sink device handler into kdump node */ + ret = coresight_kdump_sink(cpu, sink); + if (ret) + goto err_kdump; + switch (subtype) { case CORESIGHT_DEV_SUBTYPE_SOURCE_PROC: /* @@ -621,7 +629,6 @@ int coresight_enable(struct coresight_device *csdev) * be a single session per tracer (when working from sysFS) * a per-cpu variable will do just fine. */ - cpu = source_ops(csdev)->cpu_id(csdev); per_cpu(tracer_path, cpu) = path; break; case CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE: @@ -636,6 +643,9 @@ out: mutex_unlock(&coresight_mutex); return ret; +err_kdump: + coresight_disable_source(csdev); + err_source: coresight_disable_path(path); @@ -659,9 +669,10 @@ void coresight_disable(struct coresight_device *csdev) if (!csdev->enable || !coresight_disable_source(csdev)) goto out; + cpu = source_ops(csdev)->cpu_id(csdev); + switch (csdev->subtype.source_subtype) { case CORESIGHT_DEV_SUBTYPE_SOURCE_PROC: - cpu = source_ops(csdev)->cpu_id(csdev); path = per_cpu(tracer_path, cpu); per_cpu(tracer_path, cpu) = NULL; break; @@ -674,6 +685,7 @@ void coresight_disable(struct coresight_device *csdev) break; } + coresight_kdump_sink(cpu, NULL); coresight_disable_path(path); coresight_release_path(path); |