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.

Signed-off-by: Xiaochen Shen <shenxiaochen@open-hieco.net>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
---
 tools/testing/selftests/resctrl/resctrl.h       | 1 +
 tools/testing/selftests/resctrl/resctrl_tests.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 4f9c7d04c98d..afe635b6e48d 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -39,6 +39,7 @@
  */
 #define ARCH_INTEL	BIT(0)
 #define ARCH_AMD	BIT(1)
+#define ARCH_HYGON	BIT(2)
 
 #define END_OF_TESTS	1
 
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 980ecf2bcf10..78626bbae976 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -50,6 +50,8 @@ static unsigned int detect_vendor(void)
 		vendor_id = ARCH_INTEL;
 	else if (s && !strcmp(s, ": AuthenticAMD\n"))
 		vendor_id = ARCH_AMD;
+	else if (s && !strcmp(s, ": HygonGenuine\n"))
+		vendor_id = ARCH_HYGON;
 
 	fclose(inf);
 	free(res);
-- 
2.47.3