path: root/arch
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authorZachary Amsden <zamsden@redhat.com>2010-08-19 22:07:19 -1000
committerAvi Kivity <avi@redhat.com>2010-10-11 12:36:07 +0200
commit47008cd887c1836bcadda123ba73e1863de7a6c4 (patch)
treeea0bbcd104b7c882d008486de2fc725d0396fbf1 /arch
parent58877679fd393d3ef71aa383031ac7817561463d (diff)
KVM: x86: Move TSC reset out of vmcb_init
The VMCB is reset whenever we receive a startup IPI, so Linux is setting TSC back to zero happens very late in the boot process and destabilizing the TSC. Instead, just set TSC to zero once at VCPU creation time. Why the separate patch? So git-bisect is your friend. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 12b502de1369..81ed28cb36e6 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -766,7 +766,6 @@ static void init_vmcb(struct vcpu_svm *svm)
control->iopm_base_pa = iopm_base;
control->msrpm_base_pa = __pa(svm->msrpm);
- control->tsc_offset = 0-native_read_tsc();
control->int_ctl = V_INTR_MASKING_MASK;
@@ -902,6 +901,7 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
svm->asid_generation = 0;
+ svm->vmcb->control.tsc_offset = 0-native_read_tsc();
err = fx_init(&svm->vcpu);
if (err)

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