From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754430Ab0IJPdB (ORCPT ); Fri, 10 Sep 2010 11:33:01 -0400 Received: from tx2ehsobe002.messaging.microsoft.com ([65.55.88.12]:39675 "EHLO TX2EHSOBE004.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754755Ab0IJPc7 (ORCPT ); Fri, 10 Sep 2010 11:32:59 -0400 X-SpamScore: 1 X-BigFish: VS1(zzzz1202hzz8275bhz32i2a8h87h43h) X-FB-DOMAIN-IP-MATCH: fail X-WSS-ID: 0L8JF40-02-JPW-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: , , Joerg Roedel Subject: [PATCH 18/29] KVM: MMU: Propagate the right fault back to the guest after gva_to_gpa Date: Fri, 10 Sep 2010 17:30:55 +0200 Message-ID: <1284132667-18620-19-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 implements logic to make sure that either a page-fault/page-fault-vmexit or a nested-page-fault-vmexit is propagated back to the guest. Signed-off-by: Joerg Roedel --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/x86.c | 18 +++++++++++++++++- 2 files changed, 18 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 87734cc..7d3adb8 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -660,6 +660,7 @@ 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); +void kvm_propagate_fault(struct kvm_vcpu *vcpu); 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 307599d..2816e5a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -338,6 +338,22 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu) kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); } +void kvm_propagate_fault(struct kvm_vcpu *vcpu) +{ + u32 nested, error; + + error = vcpu->arch.fault.error_code; + nested = error & PFERR_NESTED_MASK; + error = error & ~PFERR_NESTED_MASK; + + vcpu->arch.fault.error_code = error; + + if (mmu_is_nested(vcpu) && !nested) + vcpu->arch.nested_mmu.inject_page_fault(vcpu); + else + vcpu->arch.mmu.inject_page_fault(vcpu); +} + void kvm_inject_nmi(struct kvm_vcpu *vcpu) { vcpu->arch.nmi_pending = 1; @@ -4126,7 +4142,7 @@ static void inject_emulated_exception(struct kvm_vcpu *vcpu) { struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; if (ctxt->exception == PF_VECTOR) - kvm_inject_page_fault(vcpu); + kvm_propagate_fault(vcpu); else if (ctxt->error_code_valid) kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code); else -- 1.7.0.4