[PATCH v6 0/5] selftests/resctrl: Add non-contiguous CBMs in Intel CAT selftest

[Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>]

Non-contiguous CBM support for Intel CAT has been merged into the kernel
with Commit 0e3cd31f6e90 ("x86/resctrl: Enable non-contiguous CBMs in
Intel CAT") but there is no selftest that would validate if this feature
works correctly. The selftest needs to verify if writing non-contiguous
CBMs to the schemata file behaves as expected in comparison to the
information about non-contiguous CBMs support.

The patch series is based on a rework of resctrl selftests that's
currently in review [1]. The patch also implements a similar
functionality presented in the bash script included in the cover letter
of the original non-contiguous CBMs in Intel CAT series [3].

Changelog v6:
- Add Reinette's reviewed-by tag to patch 2/5.
- Fix ret type in noncont test.
- Add a check for bit_center value in noncont test.
- Add resource pointer check in resctrl_mon_feature_exists.
- Fix patch 4 leaking into patch 3 by mistake.

Changelog v5:
- Add a few reviewed-by tags.
- Make some minor text changes in patch messages and comments.
- Redo resctrl_mon_feature_exists() to be more generic and fix some of
  my errors in refactoring feature checking.

Changelog v4:
- Changes to error failure return values in non-contiguous test.
- Some minor text refactoring without functional changes.

Changelog v3:
- Rebase onto v4 of Ilpo's series [1].
- Split old patch 3/4 into two parts. One doing refactoring and one
  adding a new function.
- Some changes to all the patches after Reinette's review.

Changelog v2:
- Rebase onto v4 of Ilpo's series [2].
- Add two patches that prepare helpers for the new test.
- Move Ilpo's patch that adds test grouping to this series.
- Apply Ilpo's suggestion to the patch that adds a new test.

[1] https://lore.kernel.org/all/20231215150515.36983-1-ilpo.jarvinen@linux.intel.com/
[2] https://lore.kernel.org/all/20231211121826.14392-1-ilpo.jarvinen@linux.intel.com/
[3] https://lore.kernel.org/all/cover.1696934091.git.maciej.wieczor-retman@intel.com/

Older versions of this series:
[v1] https://lore.kernel.org/all/20231109112847.432687-1-maciej.wieczor-retman@intel.com/
[v2] https://lore.kernel.org/all/cover.1702392177.git.maciej.wieczor-retman@intel.com/
[v3] https://lore.kernel.org/all/cover.1706180726.git.maciej.wieczor-retman@intel.com/
[v4] https://lore.kernel.org/all/cover.1707130307.git.maciej.wieczor-retman@intel.com/
[v5] https://lore.kernel.org/all/cover.1707487039.git.maciej.wieczor-retman@intel.com/

Ilpo Järvinen (1):
  selftests/resctrl: Add test groups and name L3 CAT test L3_CAT

Maciej Wieczor-Retman (4):
  selftests/resctrl: Add a helper for the non-contiguous test
  selftests/resctrl: Split validate_resctrl_feature_request()
  selftests/resctrl: Add resource_info_file_exists()
  selftests/resctrl: Add non-contiguous CBMs CAT test

 tools/testing/selftests/resctrl/cat_test.c    | 92 +++++++++++++++++-
 tools/testing/selftests/resctrl/cmt_test.c    |  2 +-
 tools/testing/selftests/resctrl/mba_test.c    |  2 +-
 tools/testing/selftests/resctrl/mbm_test.c    |  6 +-
 tools/testing/selftests/resctrl/resctrl.h     | 10 +-
 .../testing/selftests/resctrl/resctrl_tests.c | 18 +++-
 tools/testing/selftests/resctrl/resctrlfs.c   | 96 ++++++++++++++++---
 7 files changed, 203 insertions(+), 23 deletions(-)

-- 
2.43.0