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| author |   Dave Jiang <dave.jiang@intel.com> | 2018-01-31 12:45:49 -0700 |
|---|---|---|
| committer |   Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-01 15:01:15 -0700 |
| commit | 96c3a239054a367d1a18581384985ab9e97c5ce7 (patch) | |
| tree | 37c8ddbba2da8a1f8f5c6c9394c340613633fae7 /drivers | |
| parent | acpi: nfit: add persistent memory control flag for nd_region (diff) | |
| download | linux-dev-96c3a239054a367d1a18581384985ab9e97c5ce7.tar.xz linux-dev-96c3a239054a367d1a18581384985ab9e97c5ce7.zip | |
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: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index abaf38c61220..e6d01911e092 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -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, }; |