| Message ID | 1444231603-26676-5-git-send-email-mathieu.poirier@linaro.org |
|---|---|
| State | Accepted |
| Commit | adfad8745c38d2bfe9e855f9d112a8583564112f |
| Headers | show |
On Wed, Oct 07, 2015 at 09:26:41AM -0600, Mathieu Poirier wrote: > 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> No documentation for this new attribute? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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);
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(+)