From: Zachary Amsden Date: Fri, 20 Aug 2010 08:07:19 +0000 (-1000) Subject: KVM: x86: Move TSC reset out of vmcb_init X-Git-Tag: v2.6.36-rc8~11^2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=47008cd887c1836bcadda123ba73e1863de7a6c4;p=karo-tx-linux.git 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 Signed-off-by: Marcelo Tosatti --- 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; init_seg(&save->es); @@ -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; init_vmcb(svm); + svm->vmcb->control.tsc_offset = 0-native_read_tsc(); err = fx_init(&svm->vcpu); if (err)