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authorSuzuki K Poulose <suzuki.poulose@arm.com>2021-10-19 17:31:44 +0100
committerMathieu Poirier <mathieu.poirier@linaro.org>2021-10-27 11:45:49 -0600
commit4585481af322e3ae53dfb78e3ec046ddfdf8902a (patch)
treef9c75c470b2b43989ae76d9047b24dea6123e6c5 /drivers/hwtracing
parent41c0e5b7a35392c90a467a9a085178642a131324 (diff)
coresight: trbe: Add a helper to pad a given buffer area
Refactor the helper to pad a given AUX buffer area to allow "filling" ignore packets, without moving any handle pointers. This will be useful in working around errata, where we may have to fill the buffer after a session. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Leo Yan <leo.yan@linaro.org> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20211019163153.3692640-7-suzuki.poulose@arm.com Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-trbe.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 54f5d61ee9fb..e3767f21ee68 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -199,12 +199,18 @@ static void trbe_stop_and_truncate_event(struct perf_output_handle *handle)
* consumed from the user space. The enabled TRBE buffer area is a moving subset of
* the allocated perf auxiliary buffer.
*/
+
+static void __trbe_pad_buf(struct trbe_buf *buf, u64 offset, int len)
+{
+ memset((void *)buf->trbe_base + offset, ETE_IGNORE_PACKET, len);
+}
+
static void trbe_pad_buf(struct perf_output_handle *handle, int len)
{
struct trbe_buf *buf = etm_perf_sink_config(handle);
u64 head = PERF_IDX2OFF(handle->head, buf);
- memset((void *)buf->trbe_base + head, ETE_IGNORE_PACKET, len);
+ __trbe_pad_buf(buf, head, len);
if (!buf->snapshot)
perf_aux_output_skip(handle, len);
}