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2eeb0d457d
Inspired by commit f131d9edc2 ("selftests/lkdtm: Don't clear dmesg
when running tests"), keep a reference dmesg copy when beginning each
test. This way check_result() can compare against the initial copy
rather than relying upon an empty log.
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Reviewed-by: Yannick Cote <ycote@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200618181040.21132-2-joe.lawrence@redhat.com
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
====================
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Livepatch Self Tests
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====================
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This is a small set of sanity tests for the kernel livepatching.
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The test suite loads and unloads several test kernel modules to verify
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livepatch behavior. Debug information is logged to the kernel's message
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buffer and parsed for expected messages. (Note: the tests will compare
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the message buffer for only the duration of each individual test.)
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Config
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------
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Set these config options and their prerequisites:
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CONFIG_LIVEPATCH=y
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CONFIG_TEST_LIVEPATCH=m
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Running the tests
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-----------------
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Test kernel modules are built as part of lib/ (make modules) and need to
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be installed (make modules_install) as the test scripts will modprobe
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them.
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To run the livepatch selftests, from the top of the kernel source tree:
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% make -C tools/testing/selftests TARGETS=livepatch run_tests
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Adding tests
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------------
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See the common functions.sh file for the existing collection of utility
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functions, most importantly setup_config(), start_test() and
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check_result(). The latter function greps the kernel's ring buffer for
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"livepatch:" and "test_klp" strings, so tests be sure to include one of
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those strings for result comparison. Other utility functions include
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general module loading and livepatch loading helpers (waiting for patch
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transitions, sysfs entries, etc.)
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