Commit 452996fa authored by Dave Jiang's avatar Dave Jiang Committed by Dan Williams
Browse files

cxl/pmem: add provider name to cxl pmem dimm attribute group 



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: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983618174.2734609.15600031015423828810.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 18fa5563

Documentation/ABI/testing/sysfs-bus-nvdimm

+8 −0
Original line number Diff line number Diff line
@@ -47,3 +47,11 @@ Date: November 2022 
KernelVersion:	6.2

Contact:	Dave Jiang <dave.jiang@intel.com>

Description:	(RO) Show the id (serial) of the device. This is CXL specific.



What:		/sys/bus/nd/devices/nmemX/cxl/provider

Date:		November 2022

KernelVersion:	6.2

Contact:	Dave Jiang <dave.jiang@intel.com>

Description:	(RO) Shows the CXL bridge device that ties to a CXL memory device

		to this NVDIMM device. I.e. the parent of the device returned is

		a /sys/bus/cxl/devices/memX instance.

drivers/cxl/pmem.c

+10 −0
Original line number Diff line number Diff line
@@ -51,6 +51,15 @@ 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);
@@ -63,6 +72,7 @@ static DEVICE_ATTR_RO(id); 


static struct attribute *cxl_dimm_attributes[] = {

	&dev_attr_id.attr,

	&dev_attr_provider.attr,

	NULL

};