CONFIG_CXL: Support for IBM Coherent Accelerators (CXL) (DEPRECATED)

General informations

The Linux kernel configuration item CONFIG_CXL has multiple definitions:

Support for IBM Coherent Accelerators (CXL) (DEPRECATED) found in drivers/misc/cxl/Kconfig

The configuration item CONFIG_CXL:

• prompt: Support for IBM Coherent Accelerators (CXL) (DEPRECATED)
• type: tristate
• depends on: CONFIG_PPC_POWERNV && CONFIG_PCI_MSI && CONFIG_EEH
• defined in drivers/misc/cxl/Kconfig
• found in Linux kernels: 6.14
• modules built: cxl, cxl_hw

Help text

The cxl driver is deprecated and will be removed in a future kernel release.

Select this option to enable driver support for IBM Coherent Accelerators (CXL). CXL is otherwise known as Coherent Accelerator Processor Interface (CAPI). CAPI allows accelerators in FPGAs to be coherently attached to a CPU via an MMU. This driver enables userspace programs to access these accelerators via /dev/cxl/afuM.N devices.

CAPI adapters are found in POWER8 based systems.

If unsure, say N.

Support for IBM Coherent Accelerators (CXL) found in drivers/misc/cxl/Kconfig

The configuration item CONFIG_CXL:

• prompt: Support for IBM Coherent Accelerators (CXL)
• type: tristate
• depends on: CONFIG_PPC_POWERNV && CONFIG_PCI_MSI && CONFIG_EEH
• defined in drivers/misc/cxl/Kconfig
• found in Linux kernels: 3.18–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.13
• modules built: cxl, cxl_hw

Help text

Select this option to enable driver support for IBM Coherent Accelerators (CXL). CXL is otherwise known as Coherent Accelerator Processor Interface (CAPI). CAPI allows accelerators in FPGAs to be coherently attached to a CPU via an MMU. This driver enables userspace programs to access these accelerators via /dev/cxl/afuM.N devices.

CAPI adapters are found in POWER8 based systems.

If unsure, say N.

Hardware

PCI

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

• class: 12 ("Processing accelerators"), subclass: 00 ("Processing accelerators"), prog-if: 00
• vendor: 1014 ("IBM"), device: 044b ("GenWQE Accelerator Adapter")
• vendor: 1014 ("IBM"), device: 0477
• vendor: 1014 ("IBM"), device: 04cf
• vendor: 1014 ("IBM"), device: 0601
• vendor: 1014 ("IBM"), device: 0623
• vendor: 1014 ("IBM"), device: 0628

LKDDb

Raw data from LKDDb:

• lkddb fs "cxl" : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/api.c # in 4.10–4.20, 5.0–5.19, 6.0–6.14
• lkddb module cxl CONFIG_CXL : drivers/misc/cxl/Kconfig : "Support for IBM Coherent Accelerators (CXL)" # in 3.18–3.19, 4.0–4.17
• lkddb module cxl_hw CONFIG_CXL : drivers/misc/cxl/Kconfig : "Support for IBM Coherent Accelerators (CXL) (DEPRECATED)" # in 4.18–4.20, 5.0–5.19, 6.0–6.14
• lkddb of "" "" "ibm,coherent-platform-facility" : CONFIG_CXL CONFIG_CXL_BASE CONFIG_PPC_PSERIES : drivers/misc/cxl/of.c # in 4.6–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci .... .... .... .... 120000 : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.3–4.15
• lkddb pci 1014 044b .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.3–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci 1014 0477 .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.3–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci 1014 04cf .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.3–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci 1014 0601 .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.5–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci 1014 0623 .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.12–4.20, 5.0–5.19, 6.0–6.14
• lkddb pci 1014 0628 .... .... ...... : CONFIG_CXL CONFIG_CXL_BASE : drivers/misc/cxl/pci.c # in 4.12–4.20, 5.0–5.19, 6.0–6.14
• lkddb platform "cxl_of" : CONFIG_CXL CONFIG_CXL_BASE CONFIG_PPC_PSERIES : drivers/misc/cxl/of.c # in 4.6–4.20, 5.0–5.19, 6.0–6.14

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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