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coresight: etm-perf: Update to activate selected configuration

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Add calls to activate the selected configuration as perf starts
and stops the tracing session.

Link: https://lore.kernel.org/r/20210723165444.1048-7-mike.leach@linaro.org
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210818194022.379573-7-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Leach 2021-08-18 13:40:17 -06:00 committed by Greg Kroah-Hartman
parent f8cce2ff3c
commit a0114b4740
2 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/hwtracing/coresight/coresight-etm-perf.c
View File

@ -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;
/*

2
drivers/hwtracing/coresight/coresight-etm-perf.h
View File

@ -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;
};