On Fri, May 29, 2026 at 10:23:48AM +0800, Richard Cheng wrote:
> This series fixes numerous issues in the resctrl selftests on aarch64,
> where they currently misreport failures.
>
> Patch 1 skips L3_CAT at feature-check time when MPAM legitimately
> reports every CBM bit as shareable, instead of failing the test.
>
> Patch 2 adds aarch64 implementations of cl_flush() and sb() in
> fill_buf.c so cache flushes are no longer silent no-ops.
>
> Patch 3 teaches detect_vendor() about aarch64 (which exposes no
> vendor_id in /proc/cpuinfo) and lets arch_supports_noncont_cat()
> return true for ARM, fixing spurious L3_NONCONT_CAT failures.
>
> Changes since v2:
> - Patch 1: add Ilpo's Reviewed-by.
> - Patch 3: factor the aarch64 check into a detect_aarch64() helper
> instead of an inline #ifdef in detect_vendor().
> - Fix the patch ordering in this cover letter to match the series.
>
> Richard Cheng (3):
> selftests/resctrl: Skip L3_CAT when no exclusive cache portion exists
> selftests/resctrl: Implement cl_flush() and sb() for aarch64
> selftests/resctrl: Recognise aarch64 as a vendor for L3_NONCONT_CAT
>
> tools/testing/selftests/resctrl/cat_test.c | 32 +++++++++++++++++--
> tools/testing/selftests/resctrl/fill_buf.c | 6 ++++
> tools/testing/selftests/resctrl/resctrl.h | 1 +
> .../testing/selftests/resctrl/resctrl_tests.c | 21 ++++++++++++
> 4 files changed, 57 insertions(+), 3 deletions(-)
>
> --
> 2.43.0
>
Sorry forgot to cc Ilpo.
+Cc. Ilpo Järvinen
Best regards,
Richard Cheng.