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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/testing/selftests/vDSO/vdso_test_getcpu.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/vDSO/vdso_test_getcpu.c')
-rw-r--r--tools/testing/selftests/vDSO/vdso_test_getcpu.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/tools/testing/selftests/vDSO/vdso_test_getcpu.c b/tools/testing/selftests/vDSO/vdso_test_getcpu.c
new file mode 100644
index 0000000000..1df5d057d7
--- /dev/null
+++ b/tools/testing/selftests/vDSO/vdso_test_getcpu.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vdso_test_getcpu.c: Sample code to test parse_vdso.c and vDSO getcpu()
+ *
+ * Copyright (c) 2020 Arm Ltd
+ */
+
+#include <stdint.h>
+#include <elf.h>
+#include <stdio.h>
+#include <sys/auxv.h>
+#include <sys/time.h>
+
+#include "../kselftest.h"
+#include "parse_vdso.h"
+
+#if defined(__riscv)
+const char *version = "LINUX_4.15";
+#else
+const char *version = "LINUX_2.6";
+#endif
+const char *name = "__vdso_getcpu";
+
+struct getcpu_cache;
+typedef long (*getcpu_t)(unsigned int *, unsigned int *,
+ struct getcpu_cache *);
+
+int main(int argc, char **argv)
+{
+ unsigned long sysinfo_ehdr;
+ unsigned int cpu, node;
+ getcpu_t get_cpu;
+ long ret;
+
+ sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
+ if (!sysinfo_ehdr) {
+ printf("AT_SYSINFO_EHDR is not present!\n");
+ return KSFT_SKIP;
+ }
+
+ vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
+
+ get_cpu = (getcpu_t)vdso_sym(version, name);
+ if (!get_cpu) {
+ printf("Could not find %s\n", name);
+ return KSFT_SKIP;
+ }
+
+ ret = get_cpu(&cpu, &node, 0);
+ if (ret == 0) {
+ printf("Running on CPU %u node %u\n", cpu, node);
+ } else {
+ printf("%s failed\n", name);
+ return KSFT_FAIL;
+ }
+
+ return 0;
+}