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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: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983618174.2734609.15600031015423828810.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2022-11-30 12:23:01 -07:00 committed by Dan Williams
parent 18fa556375
commit 452996fa07
2 changed files with 18 additions and 0 deletions
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8
Documentation/ABI/testing/sysfs-bus-nvdimm
View File

@ -47,3 +47,11 @@ Date: November 2022
KernelVersion: 6.2 KernelVersion: 6.2
Contact: Dave Jiang <dave.jiang@intel.com> Contact: Dave Jiang <dave.jiang@intel.com>
Description: (RO) Show the id (serial) of the device. This is CXL specific. 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.

10
drivers/cxl/pmem.c
View File

@ -51,6 +51,15 @@ static void unregister_nvdimm(void *nvdimm)
cxl_nvd->bridge = NULL; 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) static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
{ {
struct nvdimm *nvdimm = to_nvdimm(dev); struct nvdimm *nvdimm = to_nvdimm(dev);
@ -63,6 +72,7 @@ static DEVICE_ATTR_RO(id);
static struct attribute *cxl_dimm_attributes[] = { static struct attribute *cxl_dimm_attributes[] = {
&dev_attr_id.attr, &dev_attr_id.attr,
&dev_attr_provider.attr,
NULL NULL
}; };