[PATCH v4 1/5] tools headers UAPI: Update tools' copy of linux/coresight-pmu.h

From: Leo Yan
Date: Sat Feb 13 2021 - 06:33:40 EST


To get the changes in the commit:

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

Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
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