From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932736AbZHZKiz (ORCPT ); Wed, 26 Aug 2009 06:38:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932690AbZHZKin (ORCPT ); Wed, 26 Aug 2009 06:38:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34880 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757038AbZHZKaM (ORCPT ); Wed, 26 Aug 2009 06:30:12 -0400 From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 14/47] KVM: SVM: optimize nested vmrun Date: Wed, 26 Aug 2009 13:29:36 +0300 Message-Id: <1251282609-12835-15-git-send-email-avi@redhat.com> In-Reply-To: <1251282609-12835-1-git-send-email-avi@redhat.com> References: <1251282609-12835-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel Only copy the necessary parts of the vmcb save area on vmrun and save precious time. Signed-off-by: Joerg Roedel Acked-by: Alexander Graf Signed-off-by: Avi Kivity --- arch/x86/kvm/svm.c | 28 +++++++++++++++++++++------- 1 files changed, 21 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 2f5f223..f11f880 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1681,6 +1681,7 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, { struct vmcb *nested_vmcb = (struct vmcb *)arg1; struct vmcb *hsave = svm->hsave; + struct vmcb *vmcb = svm->vmcb; /* nested_vmcb is our indicator if nested SVM is activated */ svm->nested_vmcb = svm->vmcb->save.rax; @@ -1691,12 +1692,25 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, /* Save the old vmcb, so we don't need to pick what we save, but can restore everything when a VMEXIT occurs */ - memcpy(hsave, svm->vmcb, sizeof(struct vmcb)); - /* We need to remember the original CR3 in the SPT case */ - if (!npt_enabled) - hsave->save.cr3 = svm->vcpu.arch.cr3; - hsave->save.cr4 = svm->vcpu.arch.cr4; - hsave->save.rip = svm->next_rip; + hsave->save.es = vmcb->save.es; + hsave->save.cs = vmcb->save.cs; + hsave->save.ss = vmcb->save.ss; + hsave->save.ds = vmcb->save.ds; + hsave->save.gdtr = vmcb->save.gdtr; + hsave->save.idtr = vmcb->save.idtr; + hsave->save.efer = svm->vcpu.arch.shadow_efer; + hsave->save.cr0 = svm->vcpu.arch.cr0; + hsave->save.cr4 = svm->vcpu.arch.cr4; + hsave->save.rflags = vmcb->save.rflags; + hsave->save.rip = svm->next_rip; + hsave->save.rsp = vmcb->save.rsp; + hsave->save.rax = vmcb->save.rax; + if (npt_enabled) + hsave->save.cr3 = vmcb->save.cr3; + else + hsave->save.cr3 = svm->vcpu.arch.cr3; + + hsave->control = vmcb->control; if (svm->vmcb->save.rflags & X86_EFLAGS_IF) svm->vcpu.arch.hflags |= HF_HIF_MASK; @@ -1721,7 +1735,7 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); kvm_mmu_reset_context(&svm->vcpu); } - svm->vmcb->save.cr2 = nested_vmcb->save.cr2; + svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); -- 1.6.4.1