linux-kernel - [PATCH 2/6] tools headers UAPI: Update tools' copy of linux/coresight-pmu.h

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Date:   Wed, 24 Feb 2021 09:48:31 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     acme@...nel.org
Cc:     mike.leach@...aro.org, leo.yan@...aro.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] tools headers UAPI: Update tools' copy of linux/coresight-pmu.h

From: Leo Yan <leo.yan@...aro.org>

To get the changes in the commit:

  "coresight: etm-perf: Clarify comment on perf options".

Signed-off-by: Leo Yan <leo.yan@...aro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Link: https://lore.kernel.org/r/20210213113220.292229-2-leo.yan@linaro.org
---
 tools/include/linux/coresight-pmu.h | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/tools/include/linux/coresight-pmu.h b/tools/include/linux/coresight-pmu.h
index b0e35eec6499..5dc47cfdcf07 100644
--- a/tools/include/linux/coresight-pmu.h
+++ b/tools/include/linux/coresight-pmu.h
@@ -10,11 +10,18 @@
 #define CORESIGHT_ETM_PMU_NAME "cs_etm"
 #define CORESIGHT_ETM_PMU_SEED  0x10
 
-/* ETMv3.5/PTM's ETMCR config bit */
-#define ETM_OPT_CYCACC  12
-#define ETM_OPT_CTXTID	14
-#define ETM_OPT_TS      28
-#define ETM_OPT_RETSTK	29
+/*
+ * Below are the definition of bit offsets for perf option, and works as
+ * arbitrary values for all ETM versions.
+ *
+ * Most of them are orignally from ETMv3.5/PTM's ETMCR config, therefore,
+ * ETMv3.5/PTM doesn't define ETMCR config bits with prefix "ETM3_" and
+ * directly use below macros as config bits.
+ */
+#define ETM_OPT_CYCACC		12
+#define ETM_OPT_CTXTID		14
+#define ETM_OPT_TS		28
+#define ETM_OPT_RETSTK		29
 
 /* ETMv4 CONFIGR programming bits for the ETM OPTs */
 #define ETM4_CFG_BIT_CYCACC	4
-- 
2.25.1