[PATCH i-g-t v2 0/4] Add support for KUnit tests

[Isabella Basso <isabbasso@riseup.net>]

This patch series was first developed as part of the LKCamp hackathon
that happened last year[1], mainly focusing on refactoring DRM tests to
use KUnit.

KUnit[2][3] is a unified test framework that provides helper tools,
simplifying their development and execution. Using an x86-64 machine
it's possible to run tests in the host's kernel natively using user-mode
Linux[4] (aka UML), which simplifies usage in a wide variety of
scenarios, including integration to CI.

As the tool's adoption widens into graphics testing territory, I and
LKCamp members figured it would be important to support it in IGT, as
it's a core tool for GPU drivers maintainers.

I have then added KUnit support into IGT mainly following the KTAP
specs, and it can be tested using patch 4/4 in this series together with
a DRM selftests patch series available at [5].

Changes since v1:
- Major rework of parsing function structure:
  - It is not longer recursive
  - Adapt kselftests functions and structs to be used with KUnit
- Switch DRM selftests to KUnit parsing as they're updated in the kernel
- Replace AMD KUnit tests by DRM selftests

[1]: https://groups.google.com/g/kunit-dev/c/YqFR1q2uZvk/m/IbvItSfHBAAJ
[2]: https://kunit.dev
[3]: https://docs.kernel.org/dev-tools/kunit/index.html
[4]: http://user-mode-linux.sourceforge.net
[5]: https://lore.kernel.org/all/20220708203052.236290-1-maira.canal@usp.br/

Isabella Basso (4):
  lib/igt_kmod: rename kselftest functions to ktest
  lib/igt_kmod.c: check if module is builtin before attempting to unload
    it
  lib/igt_kmod: add compatibility for KUnit
  tests: DRM selftests: switch to KUnit

 lib/igt_kmod.c       | 315 +++++++++++++++++++++++++++++++++++++++++--
 lib/igt_kmod.h       |  14 +-
 tests/drm_buddy.c    |   7 +-
 tests/drm_mm.c       |   7 +-
 tests/kms_selftest.c |  12 +-
 5 files changed, 329 insertions(+), 26 deletions(-)

-- 
2.37.2