Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1====================
2Livepatch Self Tests
3====================
4
5This is a small set of sanity tests for the kernel livepatching.
6
7The test suite loads and unloads several test kernel modules to verify
8livepatch behavior. Debug information is logged to the kernel's message
9buffer and parsed for expected messages. (Note: the tests will clear
10the message buffer between individual tests.)
11
12
13Config
14------
15
16Set these config options and their prerequisites:
17
18CONFIG_LIVEPATCH=y
19CONFIG_TEST_LIVEPATCH=m
20
21
22Running the tests
23-----------------
24
25Test kernel modules are built as part of lib/ (make modules) and need to
26be installed (make modules_install) as the test scripts will modprobe
27them.
28
29To run the livepatch selftests, from the top of the kernel source tree:
30
31 % make -C tools/testing/selftests TARGETS=livepatch run_tests
32
33
34Adding tests
35------------
36
37See the common functions.sh file for the existing collection of utility
38functions, most importantly set_dynamic_debug() and check_result(). The
39latter function greps the kernel's ring buffer for "livepatch:" and
40"test_klp" strings, so tests be sure to include one of those strings for
41result comparison. Other utility functions include general module
42loading and livepatch loading helpers (waiting for patch transitions,
43sysfs entries, etc.)