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KVM: selftests: Use generic sys_clocksource_is_tsc() in vmx_nested_tsc_scaling_test

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Despite its name, system_has_stable_tsc() just checks that system
clocksource is 'tsc'; this can now be done with generic
sys_clocksource_is_tsc().

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20240109141121.1619463-3-vkuznets@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Vitaly Kuznetsov 2024-01-09 15:11:18 +01:00 committed by Sean Christopherson
parent e440c5f2e3
commit 410cb01ead
1 changed files with 1 additions and 18 deletions
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19
tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
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@ -116,23 +116,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_DONE();
}
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)
return false;
tsc_is_stable = fgets(buf, sizeof(buf), fp) &&
!strncmp(buf, "tsc", sizeof(buf));
fclose(fp);
return tsc_is_stable;
}
int main(int argc, char *argv[])
{
struct kvm_vcpu *vcpu;
@ -148,7 +131,7 @@ int main(int argc, char *argv[])
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_TSC_CONTROL));
TEST_REQUIRE(system_has_stable_tsc());
TEST_REQUIRE(sys_clocksource_is_tsc());
/*
* We set L1's scale factor to be a random number from 2 to 10.