Re: [PATCH v2] KVM: nVMX: Reset RFLAGS on VM-exit

[Gleb Natapov <gleb@redhat.com>]

On Sun, Mar 03, 2013 at 08:47:11PM +0100, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> Ouch, how could this work so well that far? We need to clear RFLAGS to
> the reset value as specified by the SDM. Particularly, IF must be off
> after VM-exit!
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>

> ---
> 
> Changes in v2:
>  - use symbolic constant for rflags reset value
> 
>  arch/x86/kvm/vmx.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 486078d..eece4c8 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -7454,6 +7454,7 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
>  
>  	kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
>  	kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
> +	vmx_set_rflags(vcpu, X86_EFLAGS_BIT1);
>  	/*
>  	 * Note that calling vmx_set_cr0 is important, even if cr0 hasn't
>  	 * actually changed, because it depends on the current state of
> -- 
> 1.7.3.4

--
			Gleb.