[0/2] kunit: add boot time parameter to enable KUnit

Message

Joe Fradley Aug. 17, 2022, 4:48 p.m. UTC

There are some use cases where the kernel binary is desired to be the same
for both production and testing. This poses a problem for users of KUnit
as built-in tests will automatically run at startup and test modules
can still be loaded leaving the kernel in an unsafe state. There is a
"test" taint flag that gets set if a test runs but nothing to prevent
the execution.

This patch adds the kunit.enable module parameter that will need to be
set to true in addition to KUNIT being enabled for KUnit tests to run.
The default value is true giving backwards compatibility. However, for
the production+testing use case the new config option
KUNIT_ENABLE_DEFAULT_DISABLED can be enabled to default kunit.enable to
false requiring the tester to opt-in by passing kunit.enable=1 to
the kernel.

Joe Fradley (2):
  kunit: add kunit.enable to enable/disable KUnit test
  kunit: no longer call module_info(test, "Y") for kunit modules

 .../admin-guide/kernel-parameters.txt         |  6 ++++++
 include/kunit/test.h                          |  1 -
 lib/kunit/Kconfig                             |  8 ++++++++
 lib/kunit/test.c                              | 20 +++++++++++++++++++
 4 files changed, 34 insertions(+), 1 deletion(-)