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CONFIG_CXL_MEM: CXL: Memory Expansion

General informations

The Linux kernel configuration item CONFIG_CXL_MEM has multiple definitions:

CXL: Memory Expansion found in drivers/cxl/Kconfig

The 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 were attached to the typical CPU memory controller. This is known as HDM "Host-managed Device Memory".

Say 'y/m' to enable a driver that will attach to CXL.mem devices for memory expansion and control of HDM. See Chapter 9.13 in the CXL 2.0 specification for a detailed description of HDM.

If unsure say 'm'.

CXL.mem: Memory Devices found in drivers/cxl/Kconfig

The 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 that will attach to CXL.mem devices for configuration and management primarily via the mailbox interface. See Chapter 2.3 Type 3 CXL Device in the CXL 2.0 specification for more details.

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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