From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754862Ab0IJPeV (ORCPT ); Fri, 10 Sep 2010 11:34:21 -0400 Received: from tx2ehsobe003.messaging.microsoft.com ([65.55.88.13]:43632 "EHLO TX2EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754786Ab0IJPdE (ORCPT ); Fri, 10 Sep 2010 11:33:04 -0400 X-SpamScore: 1 X-BigFish: VS1(zzzz1202hzz8275bhz32i87h2a8h43h61h) X-Spam-TCS-SCL: 0:0 X-FB-DOMAIN-IP-MATCH: fail X-WSS-ID: 0L8JF42-01-7OW-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: , , Joerg Roedel Subject: [PATCH 14/29] KVM: X86: Add kvm_read_guest_page_mmu function Date: Fri, 10 Sep 2010 17:30:51 +0200 Message-ID: <1284132667-18620-15-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: unknown Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a function which can read from the guests physical memory or from the guest's guest physical memory. This will be used in the two-dimensional page table walker. Signed-off-by: Joerg Roedel --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/x86.c | 23 +++++++++++++++++++++++ 2 files changed, 26 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 10a5ddd..5d9e0bb 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -657,6 +657,9 @@ void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); void kvm_inject_page_fault(struct kvm_vcpu *vcpu); +int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, + gfn_t gfn, void *data, int offset, int len, + u32 access); bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); int kvm_pic_set_irq(void *opaque, int irq, int level); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1054519..34bc840 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -370,6 +370,29 @@ bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) EXPORT_SYMBOL_GPL(kvm_require_cpl); /* + * This function will be used to read from the physical memory of the currently + * running guest. The difference to kvm_read_guest_page is that this function + * can read from guest physical or from the guest's guest physical memory. + */ +int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, + gfn_t ngfn, void *data, int offset, int len, + u32 access) +{ + gfn_t real_gfn; + gpa_t ngpa; + + ngpa = gfn_to_gpa(ngfn); + real_gfn = mmu->translate_gpa(vcpu, ngpa, access); + if (real_gfn == UNMAPPED_GVA) + return -EFAULT; + + real_gfn = gpa_to_gfn(real_gfn); + + return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); +} +EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); + +/* * Load the pae pdptrs. Return true is they are all valid. */ int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) -- 1.7.0.4