xref: /linux-6.15/Documentation/ABI/testing/sysfs-kernel-livepatch (revision d83a7cb3)

What:		/sys/kernel/livepatch
Date:		Nov 2014
KernelVersion:	3.19.0
Contact:	[email protected]
Description:
		Interface for kernel live patching

		The /sys/kernel/livepatch directory contains subdirectories for
		each loaded live patch module.

What:		/sys/kernel/livepatch/<patch>
Date:		Nov 2014
KernelVersion:	3.19.0
Contact:	[email protected]
Description:
		The patch directory contains subdirectories for each kernel
		object (vmlinux or a module) in which it patched functions.

What:		/sys/kernel/livepatch/<patch>/enabled
Date:		Nov 2014
KernelVersion:	3.19.0
Contact:	[email protected]
Description:
		A writable attribute that indicates whether the patched
		code is currently applied.  Writing 0 will disable the patch
		while writing 1 will re-enable the patch.

What:		/sys/kernel/livepatch/<patch>/transition
Date:		Feb 2017
KernelVersion:	4.12.0
Contact:	[email protected]
Description:
		An attribute which indicates whether the patch is currently in
		transition.

What:		/sys/kernel/livepatch/<patch>/<object>
Date:		Nov 2014
KernelVersion:	3.19.0
Contact:	[email protected]
Description:
		The object directory contains subdirectories for each function
		that is patched within the object.

What:		/sys/kernel/livepatch/<patch>/<object>/<function,sympos>
Date:		Nov 2014
KernelVersion:	3.19.0
Contact:	[email protected]
Description:
		The function directory contains attributes regarding the
		properties and state of the patched function.

		The directory name contains the patched function name and a
		sympos number corresponding to the nth occurrence of the symbol
		name in kallsyms for the patched object.

		There are currently no such attributes.