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[v4,16/18] cxl/pmem: add provider name to cxl pmem dimm attribute group

Message ID 166845807706.2496228.28014749187387664.stgit@djiang5-desk3.ch.intel.com (mailing list archive)
State Superseded
Headers show
Series Introduce security commands for CXL pmem device | expand

Commit Message

Dave Jiang Nov. 14, 2022, 8:34 p.m. UTC 
Add provider name in order to associate cxl test dimm from cxl_test to the
cxl pmem device when going through sysfs for security testing.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 Documentation/ABI/testing/sysfs-bus-nvdimm |    6 ++++++
 drivers/cxl/pmem.c                         |   10 ++++++++++
 2 files changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/ABI/testing/sysfs-bus-nvdimm b/Documentation/ABI/testing/sysfs-bus-nvdimm
index 91945211e53b..d78e4553d9af 100644
--- a/Documentation/ABI/testing/sysfs-bus-nvdimm
+++ b/Documentation/ABI/testing/sysfs-bus-nvdimm
@@ -47,3 +47,9 @@  Date:		November 2022
 KernelVersion:	6.2
 Contact:	Dave Jiang <dave.jiang@intel.com>
 Description:	(RO) Show the id (serial) of the device.
+
+What:		/sys/bus/nd/devices/nmemX/provider
+Date:		November 2022
+KernelVersion:	6.2
+Contact:	Dave Jiang <dave.jiang@intel.com>
+Description:	(RO) Shows the provider for the device. (i.e. ACPI.NFIT, ACPI.CXL)
diff --git a/drivers/cxl/pmem.c b/drivers/cxl/pmem.c
index 9209c7dd72d0..322f834cc27d 100644
--- a/drivers/cxl/pmem.c
+++ b/drivers/cxl/pmem.c
@@ -48,6 +48,15 @@  static void unregister_nvdimm(void *nvdimm)
 	cxl_nvd->bridge = NULL;
 }
 
+static ssize_t provider_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
+
+	return sysfs_emit(buf, "%s\n", dev_name(&cxl_nvd->dev));
+}
+static DEVICE_ATTR_RO(provider);
+
 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct nvdimm *nvdimm = to_nvdimm(dev);
@@ -60,6 +69,7 @@  static DEVICE_ATTR_RO(id);
 
 static struct attribute *cxl_dimm_attributes[] = {
 	&dev_attr_id.attr,
+	&dev_attr_provider.attr,
 	NULL
 };