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| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2015-10-07 09:26:41 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-07 17:54:09 +0100 |
| commit | adfad8745c38d2bfe9e855f9d112a8583564112f (patch) | |
| tree | 17371e83eddfc28d34b5cfab0cc1c6242ed35470 /drivers/hwtracing | |
| parent | 58b8d51b841eff6473df4d25959a2ec335b7cb85 (diff) | |
| download | linux-0-day-adfad8745c38d2bfe9e855f9d112a8583564112f.tar.gz linux-0-day-adfad8745c38d2bfe9e855f9d112a8583564112f.tar.xz | |
coresight: etm3x: adding cpu affinity to sysFS interface
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm3x.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index bf2476ed9356a..4797f56e7f133 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); |