Commit 96c3a239 authored by Dave Jiang's avatar Dave Jiang Committed by Ross Zwisler

libnvdimm: expose platform persistence attribute for nd_region

Providing a sysfs attribute for nd_region that shows the persistence
capabilities for the platform.
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Reviewed-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
parent 30e6d7bf
......@@ -528,6 +528,18 @@ static ssize_t resource_show(struct device *dev,
}
static DEVICE_ATTR_RO(resource);
static ssize_t persistence_domain_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
unsigned long flags = nd_region->flags;
return sprintf(buf, "%s%s\n",
flags & BIT(ND_REGION_PERSIST_CACHE) ? "cpu_cache " : "",
flags & BIT(ND_REGION_PERSIST_MEMCTRL) ? "memory_controller " : "");
}
static DEVICE_ATTR_RO(persistence_domain);
static struct attribute *nd_region_attributes[] = {
&dev_attr_size.attr,
&dev_attr_nstype.attr,
......@@ -543,6 +555,7 @@ static struct attribute *nd_region_attributes[] = {
&dev_attr_init_namespaces.attr,
&dev_attr_badblocks.attr,
&dev_attr_resource.attr,
&dev_attr_persistence_domain.attr,
NULL,
};
......
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