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From: Jan Kiszka <jan.kiszka@siemens.com>
To: Gleb Natapov <gleb@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm <kvm@vger.kernel.org>,
	"Nadav Har'El" <nyh@math.technion.ac.il>,
	"Nakajima, Jun" <jun.nakajima@intel.com>
Subject: [PATCH] KVM: nVMX: Avoid one redundant vmcs_read in prepare_vmcs12
Date: Wed, 20 Feb 2013 14:02:23 +0100	[thread overview]
Message-ID: <5124C95F.1090704@siemens.com> (raw)

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(-)

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

             reply	other threads:[~2013-02-20 13:02 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-20 13:02 Jan Kiszka [this message]
2013-02-28  8:20 ` [PATCH] KVM: nVMX: Avoid one redundant vmcs_read in prepare_vmcs12 Gleb Natapov

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