From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755012Ab0IJPiQ (ORCPT ); Fri, 10 Sep 2010 11:38:16 -0400 Received: from tx2ehsobe003.messaging.microsoft.com ([65.55.88.13]:35586 "EHLO TX2EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753114Ab0IJPcl (ORCPT ); Fri, 10 Sep 2010 11:32:41 -0400 X-SpamScore: 1 X-BigFish: VS1(zzzz1202hzz8275bhz32i2a8h87h61h) X-Spam-TCS-SCL: 0:0 X-FB-DOMAIN-IP-MATCH: fail X-WSS-ID: 0L8JF40-02-JQ4-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: , , Joerg Roedel Subject: [PATCH 15/29] KVM: MMU: Make walk_addr_generic capable for two-level walking Date: Fri, 10 Sep 2010 17:30:52 +0200 Message-ID: <1284132667-18620-16-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1284132667-18620-1-git-send-email-joerg.roedel@amd.com> References: <1284132667-18620-1-git-send-email-joerg.roedel@amd.com> 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 uses kvm_read_guest_page_tdp to make the walk_addr_generic functions suitable for two-level page table walking. Signed-off-by: Joerg Roedel --- arch/x86/kvm/paging_tmpl.h | 30 +++++++++++++++++++++++------- 1 files changed, 23 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index eefe363..f4e09d3 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -124,6 +124,8 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker, unsigned index, pt_access, uninitialized_var(pte_access); gpa_t pte_gpa; bool eperm, present, rsvd_fault; + int offset; + u32 access = 0; trace_kvm_mmu_pagetable_walk(addr, write_fault, user_fault, fetch_fault); @@ -153,12 +155,14 @@ walk: index = PT_INDEX(addr, walker->level); table_gfn = gpte_to_gfn(pte); - pte_gpa = gfn_to_gpa(table_gfn); - pte_gpa += index * sizeof(pt_element_t); + offset = index * sizeof(pt_element_t); + pte_gpa = gfn_to_gpa(table_gfn) + offset; walker->table_gfn[walker->level - 1] = table_gfn; walker->pte_gpa[walker->level - 1] = pte_gpa; - if (kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte))) { + if (kvm_read_guest_page_mmu(vcpu, mmu, table_gfn, &pte, + offset, sizeof(pte), + PFERR_USER_MASK|PFERR_WRITE_MASK)) { present = false; break; } @@ -209,15 +213,27 @@ walk: is_large_pte(pte) && mmu->root_level == PT64_ROOT_LEVEL)) { int lvl = walker->level; + gpa_t real_gpa; + gfn_t gfn; - walker->gfn = gpte_to_gfn_lvl(pte, lvl); - walker->gfn += (addr & PT_LVL_OFFSET_MASK(lvl)) - >> PAGE_SHIFT; + gfn = gpte_to_gfn_lvl(pte, lvl); + gfn += (addr & PT_LVL_OFFSET_MASK(lvl)) >> PAGE_SHIFT; if (PTTYPE == 32 && walker->level == PT_DIRECTORY_LEVEL && is_cpuid_PSE36()) - walker->gfn += pse36_gfn_delta(pte); + gfn += pse36_gfn_delta(pte); + + access |= write_fault ? PFERR_WRITE_MASK : 0; + access |= fetch_fault ? PFERR_FETCH_MASK : 0; + access |= user_fault ? PFERR_USER_MASK : 0; + + real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn), + access); + if (real_gpa == UNMAPPED_GVA) + return 0; + + walker->gfn = real_gpa >> PAGE_SHIFT; break; } -- 1.7.0.4