From: Xiaochen Shen Date: Wed, 17 Dec 2025 03:04:56 +0000 (+0800) Subject: selftests/resctrl: Fix non-contiguous CBM check for Hygon X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86063a2568b8f2eeb68da1411b320c0ff778f852;p=thirdparty%2Flinux.git selftests/resctrl: Fix non-contiguous CBM check for Hygon 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(). Link: https://lore.kernel.org/r/20251217030456.3834956-5-shenxiaochen@open-hieco.net Signed-off-by: Xiaochen Shen Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu Signed-off-by: Shuah Khan --- diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 94cfdba5308d8..f00b622c14608 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 */