5 This is a small set of sanity tests for the kernel livepatching.
7 The test suite loads and unloads several test kernel modules to verify
8 livepatch behavior. Debug information is logged to the kernel's message
9 buffer and parsed for expected messages. (Note: the tests will compare
10 the message buffer for only the duration of each individual test.)
16 Set CONFIG_LIVEPATCH=y option and it's prerequisites.
22 To only build the tests without running them, run:
24 % make -C tools/testing/selftests/livepatch
26 The command above will compile all test modules and test programs, making them
27 ready to be packaged if so desired.
32 Test kernel modules are built before running the livepatch selftests. The
33 modules are located under test_modules directory, and are built as out-of-tree
34 modules. This is specially useful since the same sources can be built and
35 tested on systems with different kABI, ensuring they the tests are backwards
36 compatible. The modules will be loaded by the test scripts using insmod.
38 To run the livepatch selftests, from the top of the kernel source tree:
40 % make -C tools/testing/selftests TARGETS=livepatch run_tests
44 % make kselftest TARGETS=livepatch
50 See the common functions.sh file for the existing collection of utility
51 functions, most importantly setup_config(), start_test() and
52 check_result(). The latter function greps the kernel's ring buffer for
53 "livepatch:" and "test_klp" strings, so tests be sure to include one of
54 those strings for result comparison. Other utility functions include
55 general module loading and livepatch loading helpers (waiting for patch
56 transitions, sysfs entries, etc.)