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coresight: etm4x: Add missing API to set EL match on address filters

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TRCACATRn registers have match bits for secure and non-secure exception
levels which are not accessible by the sysfs API.
This adds a new sysfs parameter to enable this - addr_exlevel_s_ns.

Signed-off-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20191104181251.26732-7-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Leach 2019-11-04 11:12:43 -07:00 committed by Greg Kroah-Hartman
parent 2fe6899e36
commit 75198a7d4c
1 changed files with 42 additions and 0 deletions
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42
drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
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@ -1233,6 +1233,47 @@ static ssize_t addr_context_store(struct device *dev,
}
static DEVICE_ATTR_RW(addr_context);
static ssize_t addr_exlevel_s_ns_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u8 idx;
unsigned long val;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct etmv4_config *config = &drvdata->config;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
val = BMVAL(config->addr_acc[idx], 14, 8);
spin_unlock(&drvdata->spinlock);
return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);
}
static ssize_t addr_exlevel_s_ns_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
u8 idx;
unsigned long val;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
if (val & ~((GENMASK(14, 8) >> 8)))
return -EINVAL;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
/* clear Exlevel_ns & Exlevel_s bits[14:12, 11:8], bit[15] is res0 */
config->addr_acc[idx] &= ~(GENMASK(14, 8));
config->addr_acc[idx] |= (val << 8);
spin_unlock(&drvdata->spinlock);
return size;
}
static DEVICE_ATTR_RW(addr_exlevel_s_ns);
static ssize_t seq_idx_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@ -2038,6 +2079,7 @@ static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_addr_stop.attr,
&dev_attr_addr_ctxtype.attr,
&dev_attr_addr_context.attr,
&dev_attr_addr_exlevel_s_ns.attr,
&dev_attr_seq_idx.attr,
&dev_attr_seq_state.attr,
&dev_attr_seq_event.attr,