linux-kernel - [PATCH v2 04/10] coresight: trbe: Ensure the format flag is set on truncation

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Date:   Fri, 23 Jul 2021 13:46:05 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     coresight@...ts.linaro.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        tamas.zsoldos@....com, al.grant@....com, leo.yan@...aro.org,
        mike.leach@...aro.org, mathieu.poirier@...aro.org,
        suzuki.poulose@....com, anshuman.khandual@....com,
        jinlmao@....qualcomm.com
Subject: [PATCH v2 04/10] coresight: trbe: Ensure the format flag is set on truncation

When the TRBE is stopped on truncating an event, we may not
set the FORMAT flag, even though the size of the record is 0.
Let us be consistent and not confuse the user. Always set the
format flag for TRBE generated records.

Cc: Anshuman Khandual <anshuman.khandual@....com>
Cc: Leo Yan <leo.yan@...aro.org>
Cc: Mike Leach <mike.leach@...aro.org>
Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 176868496879..446f080f8320 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -132,7 +132,8 @@ static void trbe_stop_and_truncate_event(struct perf_output_handle *handle)
 	 * the update_buffer() to return a 0 size.
 	 */
 	trbe_drain_and_disable_local();
-	perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED);
+	perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED |
+				     PERF_AUX_FLAG_CORESIGHT_FORMAT_RAW);
 	*this_cpu_ptr(buf->cpudata->drvdata->handle) = NULL;
 }
 
-- 
2.24.1