diff mbox

KVM: nVMX: Avoid one redundant vmcs_read in prepare_vmcs12

Message ID 5124C95F.1090704@siemens.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jan Kiszka Feb. 20, 2013, 1:02 p.m. UTC 
IDT_VECTORING_INFO_FIELD was already read right after vmexit.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 arch/x86/kvm/vmx.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

Comments

Gleb Natapov Feb. 28, 2013, 8:20 a.m. UTC | #1 
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.
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diff mbox

Patch

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);