linux-kernel - [RFC PATCH 1/5] kselftests/resctrl: Detect the ARM architecture

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Message-ID: <20260123044034.141247-2-tan.shaopeng@fujitsu.com>
Date: Fri, 23 Jan 2026 13:40:27 +0900
From: Shaopeng Tan <tan.shaopeng@...itsu.com>
To: fenghuay@...dia.com,
	reinette.chatre@...el.com,
	ben.horgan@....com,
	james.morse@....com,
	shuah@...nel.org
Cc: linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	tan.shaopeng@...itsu.com
Subject: [RFC PATCH 1/5] kselftests/resctrl: Detect the ARM architecture

The resctrl test is not enabled for MPAM (ARM Memory System Resource
Partitioning and Monitoring)
Add processing to detect the ARM architecture.

Signed-off-by: Shaopeng Tan <tan.shaopeng@...itsu.com>
---
 tools/testing/selftests/resctrl/resctrl.h       | 1 +
 tools/testing/selftests/resctrl/resctrl_tests.c | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 3c51bdac2dfa..492d2a1c4033 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_ARM       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..662968d38eca 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -8,6 +8,7 @@
  *    Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>,
  *    Fenghua Yu <fenghua.yu@...el.com>
  */
+#include <sys/utsname.h>
 #include "resctrl.h"
 
 /* Volatile memory sink to prevent compiler optimizations */
@@ -26,6 +27,7 @@ static struct resctrl_test *resctrl_tests[] = {
 static int detect_vendor(void)
 {
 	FILE *inf = fopen("/proc/cpuinfo", "r");
+	struct utsname system_info;
 	int vendor_id = 0;
 	char *s = NULL;
 	char *res;
@@ -42,6 +44,11 @@ static int detect_vendor(void)
 		vendor_id = ARCH_INTEL;
 	else if (s && !strcmp(s, ": AuthenticAMD\n"))
 		vendor_id = ARCH_AMD;
+	else {
+		uname(&system_info);
+		if (strstr(system_info.machine, "aarch64") != NULL)
+			vendor_id = ARCH_ARM;
+	}
 
 	fclose(inf);
 	free(res);
-- 
2.47.3