Merge tag 'v4.4.12' into linux-linaro-lsk-v4.4

[firefly-linux-kernel-4.4.55.git] / include / linux / coresight-pmu.h

diff --git a/include/linux/coresight-pmu.h b/include/linux/coresight-pmu.h
index 6c5386b23b10970ad29fa508bd8a032eb12b1221..7d410260661bf0794fb9d9e9b9cb5df8b63bf51e 100644 (file)
--- a/include/linux/coresight-pmu.h
+++ b/include/linux/coresight-pmu.h
@@ -19,9 +19,21 @@
 #define _LINUX_CORESIGHT_PMU_H
 
 #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_TS      28
 
+static inline int coresight_get_trace_id(int cpu)
+{
+       /*
+        * A trace ID of value 0 is invalid, so let's start at some
+        * random value that fits in 7 bits and go from there.  Since
+        * the common convention is to have data trace IDs be I(N) + 1,
+        * set instruction trace IDs as a function of the CPU number.
+        */
+       return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
+}
+
 #endif