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Message-Id: <20210409103722.26290-7-mike.leach@linaro.org>
Date: Fri, 9 Apr 2021 11:37:18 +0100
From: Mike Leach <mike.leach@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
mathieu.poirier@...aro.org, linux-doc@...r.kernel.org,
suzuki.poulose@....com
Cc: yabinc@...gle.com, leo.yan@...aro.org,
alexander.shishkin@...ux.intel.com, tingwei@...eaurora.org,
gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
Mike Leach <mike.leach@...aro.org>
Subject: [PATCH v6 06/10] coresight: etm-perf: Update to activate selected configuration
Add calls to activate the selected configuration as perf starts
and stops the tracing session.
Signed-off-by: Mike Leach <mike.leach@...aro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
drivers/hwtracing/coresight/coresight-etm-perf.c | 14 +++++++++++++-
drivers/hwtracing/coresight/coresight-etm-perf.h | 2 ++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 26b4bca156aa..560baefdfed8 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -215,6 +215,10 @@ static void free_event_data(struct work_struct *work)
/* Free the sink buffers, if there are any */
free_sink_buffer(event_data);
+ /* clear any configuration we were using */
+ if (event_data->cfg_hash)
+ cscfg_deactivate_config(event_data->cfg_hash);
+
for_each_cpu(cpu, mask) {
struct list_head **ppath;
@@ -292,7 +296,7 @@ static bool sinks_compatible(struct coresight_device *a,
static void *etm_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool overwrite)
{
- u32 id;
+ u32 id, cfg_hash;
int cpu = event->cpu;
cpumask_t *mask;
struct coresight_device *sink = NULL;
@@ -310,6 +314,14 @@ static void *etm_setup_aux(struct perf_event *event, void **pages,
sink = user_sink = coresight_get_sink_by_id(id);
}
+ /* check if user wants a coresight configuration selected */
+ cfg_hash = (u32)((event->attr.config2 & GENMASK_ULL(63, 32)) >> 32);
+ if (cfg_hash) {
+ if (cscfg_activate_config(cfg_hash))
+ goto err;
+ event_data->cfg_hash = cfg_hash;
+ }
+
mask = &event_data->mask;
/*
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h
index ba617fe2217e..468f7799ab4f 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.h
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.h
@@ -49,12 +49,14 @@ struct etm_filters {
* @work: Handle to free allocated memory outside IRQ context.
* @mask: Hold the CPU(s) this event was set for.
* @snk_config: The sink configuration.
+ * @cfg_hash: The hash id of any coresight config selected.
* @path: An array of path, each slot for one CPU.
*/
struct etm_event_data {
struct work_struct work;
cpumask_t mask;
void *snk_config;
+ u32 cfg_hash;
struct list_head * __percpu *path;
};
--
2.17.1
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