Messages in this thread Patch in this message | | | From | Mathieu Poirier <> | Subject | [PATCH] coresight: etm3x: adding cpu affinity to sysFS interface | Date | Fri, 18 Sep 2015 08:47:41 -0600 |
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Without access to the device tree, it is impossible to know what CPU a tracer is affined to. As such adding a new sysFS interface to convey the information.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- drivers/hwtracing/coresight/coresight-etm3x.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index bf2476ed9356..4797f56e7f13 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -1545,6 +1545,18 @@ static ssize_t status_show(struct device *dev, } static DEVICE_ATTR_RO(status); +static ssize_t cpu_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int val; + struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->cpu; + return scnprintf(buf, PAGE_SIZE, "%d\n", val); + +} +static DEVICE_ATTR_RO(cpu); + static ssize_t traceid_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1621,6 +1633,7 @@ static struct attribute *coresight_etm_attrs[] = { &dev_attr_timestamp_event.attr, &dev_attr_status.attr, &dev_attr_traceid.attr, + &dev_attr_cpu.attr, NULL, }; ATTRIBUTE_GROUPS(coresight_etm); -- 1.9.1
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