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CONFIG_CXL_MEM: CXL.mem: Memory Devices

General informations

The Linux kernel configuration item CONFIG_CXL_MEM:

Help text

The CXL.mem protocol allows a device to act as a provider of "System RAM" and/or "Persistent Memory" that is fully coherent as if the memory was attached to the typical CPU memory controller.

Say 'y/m' to enable a driver (named "cxl_mem.ko" when built as a module) that will attach to CXL.mem devices for configuration, provisioning, and health monitoring. This driver is required for dynamic provisioning of CXL.mem attached memory which is a prerequisite for persistent memory support. Typically volatile memory is mapped by platform firmware and included in the platform memory map, but in some cases the OS is responsible for mapping that memory. See Chapter 2.3 Type 3 CXL Device in the CXL 2.0 specification.

If unsure say 'm'.

Hardware

PCI

Numeric ID (from LKDDb) and names (from pci.ids) of recognized devices:

LKDDb

Raw data from LKDDb:

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Automatically generated (in year 2021). See also LKDDb sources on GitLab