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cxl/mem: Register CXL memX devices
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What:		/sys/bus/cxl/devices/memX/firmware_version
Date:		December, 2020
KernelVersion:	v5.12
Contact:	linux-cxl@vger.kernel.org
Description:
		(RO) "FW Revision" string as reported by the Identify
		Memory Device Output Payload in the CXL-2.0
		specification.

What:		/sys/bus/cxl/devices/memX/ram/size
Date:		December, 2020
KernelVersion:	v5.12
Contact:	linux-cxl@vger.kernel.org
Description:
		(RO) "Volatile Only Capacity" as bytes. Represents the
		identically named field in the Identify Memory Device Output
		Payload in the CXL-2.0 specification.

What:		/sys/bus/cxl/devices/memX/pmem/size
Date:		December, 2020
KernelVersion:	v5.12
Contact:	linux-cxl@vger.kernel.org
Description:
		(RO) "Persistent Only Capacity" as bytes. Represents the
		identically named field in the Identify Memory Device Output
		Payload in the CXL-2.0 specification.