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coresight: tmc-etr: Create per-thread buffer allocation function 

Buffer allocation is different when dealing with per-thread and
CPU-wide sessions.  In preparation to support CPU-wide trace scenarios
simplify things by keeping allocation functions for both type separate.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2019-04-25 13:53:03 -06:00 committed by Greg Kroah-Hartman
parent 855ab61c16
commit e553a8aef4
1 changed files with 28 additions and 1 deletions
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29
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -1207,6 +1207,33 @@ done:
return etr_buf;
}
static struct etr_buf *
get_perf_etr_buf_per_thread(struct tmc_drvdata *drvdata,
struct perf_event *event, int nr_pages,
void **pages, bool snapshot)
{
struct etr_buf *etr_buf;
/*
* In per-thread mode the etr_buf isn't shared, so just go ahead
* with memory allocation.
*/
etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
return etr_buf;
}
static struct etr_buf *
get_perf_etr_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
int nr_pages, void **pages, bool snapshot)
{
if (event->cpu == -1)
return get_perf_etr_buf_per_thread(drvdata, event, nr_pages,
pages, snapshot);
return ERR_PTR(-ENOENT);
}
static struct etr_perf_buffer *
tmc_etr_setup_perf_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
int nr_pages, void **pages, bool snapshot)
@ -1223,7 +1250,7 @@ tmc_etr_setup_perf_buf(struct tmc_drvdata *drvdata, struct perf_event *event,
if (!etr_perf)
return ERR_PTR(-ENOMEM);
etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
etr_buf = get_perf_etr_buf(drvdata, event, nr_pages, pages, snapshot);
if (!IS_ERR(etr_buf))
goto done;