CONFIG_CXL_BUS: CXL (Compute Express Link) Devices Support

General informations

The Linux kernel configuration item CONFIG_CXL_BUS:

• prompt: CXL (Compute Express Link) Devices Support
• type: tristate
• depends on: CONFIG_PCI
• defined in drivers/cxl/Kconfig
• found in Linux kernels: 5.12–5.19, 6.0–6.12
• modules built: cxl_bus, cxl_core

Help text

CXL is a bus that is electrically compatible with PCI Express, but layers three protocols on that signalling (CXL.io, CXL.cache, and CXL.mem). The CXL.cache protocol allows devices to hold cachelines locally, the CXL.mem protocol allows devices to be fully coherent memory targets, the CXL.io protocol is equivalent to PCI Express. Say 'y' to enable support for the configuration and management of devices supporting these protocols.

Hardware

PCI

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

• class: 05 ("Memory controller"), subclass: 02 ("CXL"), prog-if: 10 ("CXL Memory Device (CXL 2.x)")
• class: 05 ("Memory controller"), subclass: 02 ("CXL"), prog-if: 10 ("CXL Memory Device (CXL 2.x)")
• class: 05 ("Memory controller"), subclass: 02 ("CXL"), prog-if: 10 ("CXL Memory Device (CXL 2.x)")

LKDDb

Raw data from LKDDb:

• lkddb acpi "ACPI0017" : CONFIG_CXL_ACPI CONFIG_CXL_BUS : drivers/cxl/acpi.c # in 5.14–5.18, 5.18+HEAD
• lkddb module cxl_bus CONFIG_CXL_BUS : drivers/cxl/Kconfig : "CXL (Compute Express Link) Devices Support" # in 5.12–5.13
• lkddb module cxl_core CONFIG_CXL_BUS : drivers/cxl/Kconfig : "CXL (Compute Express Link) Devices Support" # in 5.14–5.19, 6.0–6.12
• lkddb pci .... .... .... .... 050210 : CONFIG_CXL_BUS CONFIG_CXL_MEM : drivers/cxl/mem.c # in 5.12–5.13
• lkddb pci .... .... .... .... 050210 : CONFIG_CXL_BUS CONFIG_CXL_MEM : drivers/cxl/pci.c # in 5.14–5.17, 5.17+HEAD
• lkddb pci .... .... .... .... 050210 : CONFIG_CXL_BUS CONFIG_CXL_PCI : drivers/cxl/pci.c # in 5.18, 5.18+HEAD
• lkddb platform "" : CONFIG_CXL_ACPI CONFIG_CXL_BUS : drivers/cxl/acpi.c # in 5.14–5.18, 5.18+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)
• The Linux PCI ID Repository.

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