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authorMathieu Poirier <mathieu.poirier@linaro.org>2016-02-17 17:52:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-02-20 14:11:01 -0800
commit17534ceb835a1a96eb921a2a80df168723d6570a (patch)
tree6cbfd344150ab19190bf415ef4c328ccbf9dcf3d /drivers/hwtracing
parent0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4 (diff)
downloadop-kernel-dev-17534ceb835a1a96eb921a2a80df168723d6570a.zip
op-kernel-dev-17534ceb835a1a96eb921a2a80df168723d6570a.tar.gz
coresight: introducing a global trace ID function
TraceID values have to be unique for all tracers and consistent between drivers and user space. As such introducing a central function to be used whenever a traceID value is required. The patch also account for data traceIDs, which are usually I(N) + 1. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-etm3x.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index 77b3741..0ba1a39 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -27,6 +27,7 @@
#include <linux/cpu.h>
#include <linux/of.h>
#include <linux/coresight.h>
+#include <linux/coresight-pmu.h>
#include <linux/amba/bus.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
@@ -740,11 +741,7 @@ static void etm_init_arch_data(void *info)
static void etm_init_trace_id(struct etm_drvdata *drvdata)
{
- /*
- * 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.
- */
- drvdata->traceid = 0x10 + drvdata->cpu;
+ drvdata->traceid = coresight_get_trace_id(drvdata->cpu);
}
static int etm_probe(struct amba_device *adev, const struct amba_id *id)
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