linux-kernel - [PATCH 1/3] selftests/resctrl: Add CPU vendor detection for Hygon

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Message-ID: <20251204123816.2802393-2-shenxiaochen@open-hieco.net>
Date: Thu,  4 Dec 2025 20:38:14 +0800
From: Xiaochen Shen <shenxiaochen@...n-hieco.net>
To: tony.luck@...el.com,
	reinette.chatre@...el.com,
	bp@...en8.de,
	fenghuay@...dia.com
Cc: babu.moger@....com,
	james.morse@....com,
	Dave.Martin@....com,
	x86@...nel.org,
	linux-kernel@...r.kernel.org,
	shenxiaochen@...n-hieco.net
Subject: [PATCH 1/3] selftests/resctrl: Add CPU vendor detection for Hygon

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@...n-hieco.net>
---
 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 cd3adfc14969..df2a59e0141e 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -38,6 +38,7 @@
  */
 #define ARCH_INTEL     1
 #define ARCH_AMD       2
+#define ARCH_HYGON     3
 
 #define END_OF_TESTS	1
 
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 5154ffd821c4..9bf35f3beb6b 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -42,6 +42,8 @@ static 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