From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754785Ab0D0KjI (ORCPT ); Tue, 27 Apr 2010 06:39:08 -0400 Received: from va3ehsobe001.messaging.microsoft.com ([216.32.180.11]:3909 "EHLO VA3EHSOBE001.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754698Ab0D0KjE (ORCPT ); Tue, 27 Apr 2010 06:39:04 -0400 X-SpamScore: 0 X-BigFish: VPS0(zz10d1Iab9bhzz1202hzz6ff19hz32i2a8h87h64h) X-Spam-TCS-SCL: 3:0 X-FB-DOMAIN-IP-MATCH: fail X-WSS-ID: 0L1J6WQ-01-32Y-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Joerg Roedel Subject: [PATCH 19/22] KVM: MMU: Introduce init_kvm_nested_mmu() Date: Tue, 27 Apr 2010 12:38:29 +0200 Message-ID: <1272364712-17425-20-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1272364712-17425-1-git-send-email-joerg.roedel@amd.com> References: <1272364712-17425-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 27 Apr 2010 10:38:36.0183 (UTC) FILETIME=[CA928A70:01CAE5F5] MIME-Version: 1.0 Content-Type: text/plain X-Reverse-DNS: ausb3extmailp02.amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch introduces the init_kvm_nested_mmu() function which is used to re-initialize the nested mmu when the l2 guest changes its paging mode. Signed-off-by: Joerg Roedel --- arch/x86/kvm/mmu.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 54 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 8bd40b5..af89e71 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2136,6 +2136,25 @@ static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 *error) return gpa; } +static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 *error) +{ + gpa_t t_gpa; + u32 access; + u32 err; + + BUG_ON(!vcpu->arch.mmu.nested); + + /* NPT walks are treated as user writes */ + access = PFERR_WRITE_MASK | PFERR_USER_MASK; + t_gpa = vcpu->arch.nested_mmu.gva_to_gpa(vcpu, gpa, access, &err); + if (t_gpa == UNMAPPED_GVA) { + vcpu->arch.fault_address = gpa; + vcpu->arch.fault_error_code = err | PFERR_NESTED_MASK; + } + + return t_gpa; +} + static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access, u32 *error) { @@ -2465,11 +2484,45 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu) return r; } +static int init_kvm_nested_mmu(struct kvm_vcpu *vcpu) +{ + struct kvm_mmu *g_context = &vcpu->arch.nested_mmu; + struct kvm_mmu *h_context = &vcpu->arch.mmu; + + g_context->get_cr3 = get_cr3; + g_context->translate_gpa = translate_nested_gpa; + g_context->inject_page_fault = kvm_inject_page_fault; + + /* + * Note that arch.mmu.gva_to_gpa translates l2_gva to l1_gpa. The + * translation of l2_gpa to l1_gpa addresses is done using the + * arch.nested_mmu.gva_to_gpa function. Basically the gva_to_gpa + * functions between mmu and nested_mmu are swapped. + */ + if (!is_paging(vcpu)) { + g_context->root_level = 0; + h_context->gva_to_gpa = nonpaging_gva_to_gpa_nested; + } else if (is_long_mode(vcpu)) { + g_context->root_level = PT64_ROOT_LEVEL; + h_context->gva_to_gpa = paging64_gva_to_gpa_nested; + } else if (is_pae(vcpu)) { + g_context->root_level = PT32E_ROOT_LEVEL; + h_context->gva_to_gpa = paging64_gva_to_gpa_nested; + } else { + g_context->root_level = PT32_ROOT_LEVEL; + h_context->gva_to_gpa = paging32_gva_to_gpa_nested; + } + + return 0; +} + static int init_kvm_mmu(struct kvm_vcpu *vcpu) { vcpu->arch.update_pte.pfn = bad_pfn; - if (tdp_enabled) + if (vcpu->arch.mmu.nested) + return init_kvm_nested_mmu(vcpu); + else if (tdp_enabled) return init_kvm_tdp_mmu(vcpu); else return init_kvm_softmmu(vcpu); -- 1.7.0.4