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The resctrl selftest currently fails on Hygon CPUs that support Platform QoS features, printing the error: "# Can not get vendor info..." This occurs because vendor detection is missing for Hygon CPUs. Fix this by extending the CPU vendor detection logic to include Hygon's vendor ID. Link: https://lore.kernel.org/r/20251217030456.3834956-4-shenxiaochen@open-hieco.net Signed-off-by: Xiaochen Shen <shenxiaochen@open-hieco.net> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>