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path: root/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
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Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c')
-rw-r--r--tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c22
1 files changed, 7 insertions, 15 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c b/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
index fa03c8d1ce4e..e710b6e7fb38 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
@@ -116,29 +116,21 @@ static void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_DONE();
}
-static void stable_tsc_check_supported(void)
+static bool system_has_stable_tsc(void)
{
+ bool tsc_is_stable;
FILE *fp;
char buf[4];
fp = fopen("/sys/devices/system/clocksource/clocksource0/current_clocksource", "r");
if (fp == NULL)
- goto skip_test;
+ return false;
- if (fgets(buf, sizeof(buf), fp) == NULL)
- goto close_fp;
+ tsc_is_stable = fgets(buf, sizeof(buf), fp) &&
+ !strncmp(buf, "tsc", sizeof(buf));
- if (strncmp(buf, "tsc", sizeof(buf)))
- goto close_fp;
-
- fclose(fp);
- return;
-
-close_fp:
fclose(fp);
-skip_test:
- print_skip("Kernel does not use TSC clocksource - assuming that host TSC is not stable");
- exit(KSFT_SKIP);
+ return tsc_is_stable;
}
int main(int argc, char *argv[])
@@ -156,7 +148,7 @@ int main(int argc, char *argv[])
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_TSC_CONTROL));
- stable_tsc_check_supported();
+ TEST_REQUIRE(system_has_stable_tsc());
/*
* We set L1's scale factor to be a random number from 2 to 10.