Messages in this thread | | | Subject | Re: [PATCH] KVM: x86: fix eflags state following processor init/reset | From | Wanpeng Li <> | Date | Wed, 28 Oct 2015 11:24:15 +0800 |
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Ping, :-) On 10/21/15 2:28 PM, Wanpeng Li wrote: > Reference SDM 3.4.3: > > Following initialization of the processor (either by asserting the > RESET pin or the INIT pin), the state of the EFLAGS register is > 00000002H. > > However, the eflags fixed bit is not set and other bits are also not > cleared during the init/reset in kvm. > > This patch fix it by set eflags register to 00000002H following > initialization of the processor. > > Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> > --- > arch/x86/kvm/vmx.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c > index b680c2e..326f6ea 100644 > --- a/arch/x86/kvm/vmx.c > +++ b/arch/x86/kvm/vmx.c > @@ -4935,6 +4935,7 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) > vmx_set_efer(vcpu, 0); > vmx_fpu_activate(vcpu); > update_exception_bitmap(vcpu); > + vmx_set_rflags(vcpu, X86_EFLAGS_FIXED); > > vpid_sync_context(vmx->vpid); > }
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