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

drivers/nvdimm/region_devs.c

+13 −0
Original line number Diff line number Diff line
@@ -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,

};