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x86, paravirt: don't compute pvclock adjustments if we trust the tsc

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If the HV told us we can fully trust the TSC, skip any
correction

Signed-off-by: Glauber Costa <glommer@redhat.com>
Acked-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Glauber Costa
2010-05-11 12:17:45 -04:00
committed by Avi Kivity
parent 838815a787
commit 3a0d7256a6
4 changed files with 13 additions and 0 deletions
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3
arch/x86/kernel/kvmclock.c
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@@ -215,4 +215,7 @@ void __init kvmclock_init(void)
clocksource_register(&kvm_clock);
pv_info.paravirt_enabled = 1;
pv_info.name = "KVM";
if (kvm_para_has_feature(KVM_FEATURE_CLOCKSOURCE_STABLE_BIT))
pvclock_set_flags(PVCLOCK_TSC_STABLE_BIT);
}