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The cxl driver is no longer actively maintained and we intend to remove it in a future kernel release. cxl has received minimal maintenance for several years, and is not supported on the Power10 processor. We aren't aware of any users who are likely to be using recent kernels. Change its MAINTAINERS status to obsolete, update the sysfs ABI documentation accordingly, add a warning message on device probe, change the Kconfig options to label it as deprecated, and don't build it by default. Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> Acked-by: Frederic Barrat <fbarrat@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20241210054055.144813-2-ajd@linux.ibm.com
29 lines
827 B
Plaintext
29 lines
827 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# IBM Coherent Accelerator (CXL) compatible devices
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#
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config CXL_BASE
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bool
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select PPC_COPRO_BASE
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select PPC_64S_HASH_MMU
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config CXL
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tristate "Support for IBM Coherent Accelerators (CXL) (DEPRECATED)"
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depends on PPC_POWERNV && PCI_MSI && EEH
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select CXL_BASE
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help
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The cxl driver is deprecated and will be removed in a future
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kernel release.
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Select this option to enable driver support for IBM Coherent
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Accelerators (CXL). CXL is otherwise known as Coherent Accelerator
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Processor Interface (CAPI). CAPI allows accelerators in FPGAs to be
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coherently attached to a CPU via an MMU. This driver enables
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userspace programs to access these accelerators via /dev/cxl/afuM.N
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devices.
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CAPI adapters are found in POWER8 based systems.
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If unsure, say N.
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