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KVM: x86: Tell the guest we'll warn it about tsc stability

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This patch puts up the flag that tells the guest that we'll warn it
about the tsc being trustworthy or not. By now, we also say
it is not.

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 12:17:46 -04:00 committed by Avi Kivity
parent 3a0d7256a6
commit 371bcf646d
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kvm/x86.c
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@ -857,6 +857,8 @@ static void kvm_write_guest_time(struct kvm_vcpu *v)
vcpu->hv_clock.system_time = ts.tv_nsec +
(NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;
vcpu->hv_clock.flags = 0;
/*
* The interface expects us to write an even number signaling that the
* update is finished. Since the guest won't see the intermediate
@ -1984,7 +1986,8 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
case KVM_CPUID_FEATURES:
entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) |
(1 << KVM_FEATURE_NOP_IO_DELAY) |
(1 << KVM_FEATURE_CLOCKSOURCE2);
(1 << KVM_FEATURE_CLOCKSOURCE2) |
(1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);
entry->ebx = 0;
entry->ecx = 0;
entry->edx = 0;