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.) 44