The resctrl selftest currently fails on Hygon CPUs that always supports non-contiguous CBM, printing the error:
"# Hardware and kernel differ on non-contiguous CBM support!"
This occurs because the arch_supports_noncont_cat() function lacks vendor detection for Hygon CPUs, preventing proper identification of their non-contiguous CBM capability.
Fix this by adding Hygon vendor ID detection to arch_supports_noncont_cat().
Signed-off-by: Xiaochen Shen shenxiaochen@open-hieco.net Reviewed-by: Reinette Chatre reinette.chatre@intel.com Reviewed-by: Fenghua Yu fenghuay@nvidia.com --- Maintainer note: Even though this is a fix it is not a candidate for backport since it is based on another patch series (x86/resctrl: Fix Platform QoS issues for Hygon) which is in process of being added to resctrl.
tools/testing/selftests/resctrl/cat_test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 94cfdba5308d..f00b622c1460 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -290,8 +290,10 @@ static int cat_run_test(const struct resctrl_test *test, const struct user_param
static bool arch_supports_noncont_cat(const struct resctrl_test *test) { - /* AMD always supports non-contiguous CBM. */ - if (get_vendor() == ARCH_AMD) + unsigned int vendor_id = get_vendor(); + + /* AMD and Hygon always support non-contiguous CBM. */ + if (vendor_id == ARCH_AMD || vendor_id == ARCH_HYGON) return true;
#if defined(__i386__) || defined(__x86_64__) /* arch */