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=?utf-8?B?NG83UUY4SktDY0FDRlhYYmRQcUl5aTRGQ04zUGhIOE5ZbkMvUmdrcU5DQTY5?= =?utf-8?B?Z3c9PQ==?= X-MS-Exchange-CrossTenant-Network-Message-Id: ab0027fb-e379-42c7-26d7-08de3445808d X-MS-Exchange-CrossTenant-AuthSource: SJ2PR11MB7573.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Dec 2025 21:30:24.8556 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: CbHnpTRS3eveIW9lUg9+o8eiNozC/aHPNYFyUEL3RD+MxG+8T4UwuY55ODVCTp7tlvsCFlDsx8Fb2Rtc9HvPMxFmIB2N+crhB8ZfgpPS/jc= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR11MB8707 X-OriginatorOrg: intel.com Hi Fenghua, On 12/5/25 11:39 AM, Fenghua Yu wrote: > > > On 12/5/25 01:25, Xiaochen Shen wrote: >> 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 >> Reviewed-by: Reinette Chatre >> --- >> 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 | 4 ++-- >>   1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c >> index 94cfdba5308d..59a0f80fdc5a 100644 >> --- a/tools/testing/selftests/resctrl/cat_test.c >> +++ b/tools/testing/selftests/resctrl/cat_test.c >> @@ -290,8 +290,8 @@ 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) >> +    /* AMD and Hygon always supports non-contiguous CBM. */ >> +    if (get_vendor() == ARCH_AMD || get_vendor() == ARCH_HYGON) > > nit. Better to avoid call get_vendor() twice (or even more in the future)? Are you perhaps referring to detect_vendor()? detect_vendor() does the actual digging to determine the vendor ID and is indeed called just once by get_vendor(). In subsequent calls get_vendor() just returns the static ID. Reinette