Commit e553a8ae authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Greg Kroah-Hartman
Browse files

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: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: default avatarLeo Yan <leo.yan@linaro.org>
Tested-by: default avatarRobert Walker <robert.walker@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 855ab61c

drivers/hwtracing/coresight/coresight-tmc-etr.c

+28 −1
Original line number Diff line number Diff line
@@ -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;

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