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path: root/drivers/hwtracing/coresight
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Diffstat (limited to 'drivers/hwtracing/coresight')
-rw-r--r--drivers/hwtracing/coresight/coresight-etm4x-sysfs.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
index 6ea8181816fc..9cac848cffaf 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
@@ -2306,6 +2306,34 @@ static ssize_t cpu_show(struct device *dev,
}
static DEVICE_ATTR_RO(cpu);
+static ssize_t ts_source_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int val;
+ struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ if (!drvdata->trfcr) {
+ val = -1;
+ goto out;
+ }
+
+ switch (drvdata->trfcr & TRFCR_ELx_TS_MASK) {
+ case TRFCR_ELx_TS_VIRTUAL:
+ case TRFCR_ELx_TS_GUEST_PHYSICAL:
+ case TRFCR_ELx_TS_PHYSICAL:
+ val = FIELD_GET(TRFCR_ELx_TS_MASK, drvdata->trfcr);
+ break;
+ default:
+ val = -1;
+ break;
+ }
+
+out:
+ return sysfs_emit(buf, "%d\n", val);
+}
+static DEVICE_ATTR_RO(ts_source);
+
static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_nr_pe_cmp.attr,
&dev_attr_nr_addr_cmp.attr,
@@ -2360,6 +2388,7 @@ static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_vmid_val.attr,
&dev_attr_vmid_masks.attr,
&dev_attr_cpu.attr,
+ &dev_attr_ts_source.attr,
NULL,
};