0001 What: /sys/kernel/livepatch
0002 Date: Nov 2014
0003 KernelVersion: 3.19.0
0004 Contact: live-patching@vger.kernel.org
0005 Description:
0006 Interface for kernel live patching
0007
0008 The /sys/kernel/livepatch directory contains subdirectories for
0009 each loaded live patch module.
0010
0011 What: /sys/kernel/livepatch/<patch>
0012 Date: Nov 2014
0013 KernelVersion: 3.19.0
0014 Contact: live-patching@vger.kernel.org
0015 Description:
0016 The patch directory contains subdirectories for each kernel
0017 object (vmlinux or a module) in which it patched functions.
0018
0019 What: /sys/kernel/livepatch/<patch>/enabled
0020 Date: Nov 2014
0021 KernelVersion: 3.19.0
0022 Contact: live-patching@vger.kernel.org
0023 Description:
0024 A writable attribute that indicates whether the patched
0025 code is currently applied. Writing 0 will disable the patch
0026 while writing 1 will re-enable the patch.
0027
0028 What: /sys/kernel/livepatch/<patch>/transition
0029 Date: Feb 2017
0030 KernelVersion: 4.12.0
0031 Contact: live-patching@vger.kernel.org
0032 Description:
0033 An attribute which indicates whether the patch is currently in
0034 transition.
0035
0036 What: /sys/kernel/livepatch/<patch>/force
0037 Date: Nov 2017
0038 KernelVersion: 4.15.0
0039 Contact: live-patching@vger.kernel.org
0040 Description:
0041 A writable attribute that allows administrator to affect the
0042 course of an existing transition. Writing 1 clears
0043 TIF_PATCH_PENDING flag of all tasks and thus forces the tasks to
0044 the patched or unpatched state. Administrator should not
0045 use this feature without a clearance from a patch
0046 distributor. Removal (rmmod) of patch modules is permanently
0047 disabled when the feature is used. See
0048 Documentation/livepatch/livepatch.rst for more information.
0049
0050 What: /sys/kernel/livepatch/<patch>/<object>
0051 Date: Nov 2014
0052 KernelVersion: 3.19.0
0053 Contact: live-patching@vger.kernel.org
0054 Description:
0055 The object directory contains subdirectories for each function
0056 that is patched within the object.
0057
0058 What: /sys/kernel/livepatch/<patch>/<object>/<function,sympos>
0059 Date: Nov 2014
0060 KernelVersion: 3.19.0
0061 Contact: live-patching@vger.kernel.org
0062 Description:
0063 The function directory contains attributes regarding the
0064 properties and state of the patched function.
0065
0066 The directory name contains the patched function name and a
0067 sympos number corresponding to the nth occurrence of the symbol
0068 name in kallsyms for the patched object.
0069
0070 There are currently no such attributes.
