From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754830AbZG2M5N (ORCPT ); Wed, 29 Jul 2009 08:57:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754806AbZG2M5M (ORCPT ); Wed, 29 Jul 2009 08:57:12 -0400 Received: from tx2ehsobe001.messaging.microsoft.com ([65.55.88.11]:43995 "EHLO TX2EHSOBE002.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754669AbZG2M47 (ORCPT ); Wed, 29 Jul 2009 08:56:59 -0400 X-SpamScore: 3 X-BigFish: VPS3(zzzz1202hzzz32i203h43j62h) X-Spam-TCS-SCL: 1:0 X-FB-SS: 5,8, X-WSS-ID: 0KNJNYG-03-5SR-01 From: Joerg Roedel To: Avi Kivity CC: Alexander Graf , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Joerg Roedel Subject: [PATCH 04/12] kvm/svm: optimize nested vmrun Date: Wed, 29 Jul 2009 14:56:24 +0200 Message-ID: <1248872192-30881-5-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1248872192-30881-1-git-send-email-joerg.roedel@amd.com> References: <1248872192-30881-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 29 Jul 2009 12:56:36.0999 (UTC) FILETIME=[01F6C970:01CA104C] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Only copy the necessary parts of the vmcb save area on vmrun and save precious time. Signed-off-by: Joerg Roedel --- arch/x86/kvm/svm.c | 26 ++++++++++++++++++++------ 1 files changed, 20 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 3e794f0..b85da3f 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1688,6 +1688,7 @@ 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; @@ -1698,12 +1699,25 @@ 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; -- 1.6.3.3