From patchwork Sun Aug 16 09:29:47 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 41721 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n7G9ghTv009526 for ; Sun, 16 Aug 2009 09:42:44 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754727AbZHPJfj (ORCPT ); Sun, 16 Aug 2009 05:35:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754410AbZHPJfj (ORCPT ); Sun, 16 Aug 2009 05:35:39 -0400 Received: from mx2.redhat.com ([66.187.237.31]:45357 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754050AbZHPJaN (ORCPT ); Sun, 16 Aug 2009 05:30:13 -0400 Received: from int-mx2.corp.redhat.com (int-mx2.corp.redhat.com [172.16.27.26]) by mx2.redhat.com (8.13.8/8.13.8) with ESMTP id n7G9UFqF032043; Sun, 16 Aug 2009 05:30:15 -0400 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n7G9UDnw023486; Sun, 16 Aug 2009 05:30:13 -0400 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id n7G9UC6q005108; Sun, 16 Aug 2009 05:30:12 -0400 Received: from localhost.localdomain (cleopatra.tlv.redhat.com [10.35.255.11]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 253D3250AD7; Sun, 16 Aug 2009 12:30:10 +0300 (IDT) From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 27/48] KVM: VMX: Simplify pdptr and cr3 management Date: Sun, 16 Aug 2009 12:29:47 +0300 Message-Id: <1250415008-17175-28-git-send-email-avi@redhat.com> In-Reply-To: <1250415008-17175-1-git-send-email-avi@redhat.com> References: <1250415008-17175-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.58 on 172.16.27.26 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Instead of reading the PDPTRs from memory after every exit (which is slow and wrong, as the PDPTRs are stored on the cpu), sync the PDPTRs from memory to the VMCS before entry, and from the VMCS to memory after exit. Do the same for cr3. Signed-off-by: Avi Kivity --- arch/x86/kvm/vmx.c | 21 +++++++++++++++------ 1 files changed, 15 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ea0e1d5..752465f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1547,10 +1547,6 @@ static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) static void ept_load_pdptrs(struct kvm_vcpu *vcpu) { if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { - if (!load_pdptrs(vcpu, vcpu->arch.cr3)) { - printk(KERN_ERR "EPT: Fail to load pdptrs!\n"); - return; - } vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]); vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]); vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]); @@ -1558,6 +1554,16 @@ static void ept_load_pdptrs(struct kvm_vcpu *vcpu) } } +static void ept_save_pdptrs(struct kvm_vcpu *vcpu) +{ + if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { + vcpu->arch.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); + vcpu->arch.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); + vcpu->arch.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); + vcpu->arch.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); + } +} + static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, @@ -1651,7 +1657,6 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) if (enable_ept) { eptp = construct_eptp(cr3); vmcs_write64(EPT_POINTER, eptp); - ept_load_pdptrs(vcpu); guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 : VMX_EPT_IDENTITY_PAGETABLE_ADDR; } @@ -3252,7 +3257,7 @@ static int vmx_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) * to sync with guest real CR3. */ if (enable_ept && is_paging(vcpu)) { vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); - ept_load_pdptrs(vcpu); + ept_save_pdptrs(vcpu); } if (unlikely(vmx->fail)) { @@ -3437,6 +3442,10 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { struct vcpu_vmx *vmx = to_vmx(vcpu); + if (enable_ept && is_paging(vcpu)) { + vmcs_writel(GUEST_CR3, vcpu->arch.cr3); + ept_load_pdptrs(vcpu); + } /* Record the guest's net vcpu time for enforced NMI injections. */ if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) vmx->entry_time = ktime_get();