diff options
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 51fbda837026..e44cc8464134 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -932,6 +932,101 @@ static ssize_t bb_ctrl_store(struct device *dev, } static DEVICE_ATTR_RW(bb_ctrl); +static ssize_t event_vinst_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->vinst_ctrl & ETMv4_EVENT_MASK; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t event_vinst_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + val &= ETMv4_EVENT_MASK; + drvdata->vinst_ctrl &= ~ETMv4_EVENT_MASK; + drvdata->vinst_ctrl |= val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(event_vinst); + +static ssize_t s_exlevel_vinst_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = BMVAL(drvdata->vinst_ctrl, 16, 19); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t s_exlevel_vinst_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + /* clear all EXLEVEL_S bits (bit[18] is never implemented) */ + drvdata->vinst_ctrl &= ~(BIT(16) | BIT(17) | BIT(19)); + /* enable instruction tracing for corresponding exception level */ + val &= drvdata->s_ex_level; + drvdata->vinst_ctrl |= (val << 16); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(s_exlevel_vinst); + +static ssize_t ns_exlevel_vinst_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + /* EXLEVEL_NS, bits[23:20] */ + val = BMVAL(drvdata->vinst_ctrl, 20, 23); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t ns_exlevel_vinst_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + /* clear EXLEVEL_NS bits (bit[23] is never implemented */ + drvdata->vinst_ctrl &= ~(BIT(20) | BIT(21) | BIT(22)); + /* enable instruction tracing for corresponding exception level */ + val &= drvdata->ns_ex_level; + drvdata->vinst_ctrl |= (val << 20); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(ns_exlevel_vinst); + static ssize_t cpu_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -963,6 +1058,9 @@ static struct attribute *coresight_etmv4_attrs[] = { &dev_attr_syncfreq.attr, &dev_attr_cyc_threshold.attr, &dev_attr_bb_ctrl.attr, + &dev_attr_event_vinst.attr, + &dev_attr_s_exlevel_vinst.attr, + &dev_attr_ns_exlevel_vinst.attr, &dev_attr_cpu.attr, NULL, }; |