Re: [PATCH] KVM: nVMX: Avoid one redundant vmcs_read in prepare_vmcs12

[Gleb Natapov <gleb@redhat.com>]

On Wed, Feb 20, 2013 at 02:02:23PM +0100, Jan Kiszka wrote:
> IDT_VECTORING_INFO_FIELD was already read right after vmexit.
> 
Applied, thanks.

> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>  arch/x86/kvm/vmx.c |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 7d2fbd2..d99a519 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -7368,8 +7368,7 @@ void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
>  
>  	vmcs12->vm_exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
>  	vmcs12->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
> -	vmcs12->idt_vectoring_info_field =
> -		vmcs_read32(IDT_VECTORING_INFO_FIELD);
> +	vmcs12->idt_vectoring_info_field = to_vmx(vcpu)->idt_vectoring_info;
>  	vmcs12->idt_vectoring_error_code =
>  		vmcs_read32(IDT_VECTORING_ERROR_CODE);
>  	vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
> -- 
> 1.7.3.4

--
			Gleb.