From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757808Ab0BRLj4 (ORCPT ); Thu, 18 Feb 2010 06:39:56 -0500 Received: from va3ehsobe005.messaging.microsoft.com ([216.32.180.15]:33446 "EHLO VA3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757897Ab0BRLi5 (ORCPT ); Thu, 18 Feb 2010 06:38:57 -0500 X-SpamScore: -2 X-BigFish: VPS-2(zz936eMab9bhzz1202hzzz32i87h6bh43j61h) X-Spam-TCS-SCL: 0:0 X-FB-DOMAIN-IP-MATCH: fail X-WSS-ID: 0KY1CCD-01-N2L-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Joerg Roedel , stable@kernel.org Subject: [PATCH 02/10] KVM: SVM: Fix wrong interrupt injection in enable_irq_windows Date: Thu, 18 Feb 2010 12:38:27 +0100 Message-ID: <1266493115-28386-3-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.6.6 In-Reply-To: <1266493115-28386-1-git-send-email-joerg.roedel@amd.com> References: <1266493115-28386-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 18 Feb 2010 11:38:37.0358 (UTC) FILETIME=[E8F33CE0:01CAB08E] 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 The nested_svm_intr() function does not execute the vmexit anymore. Therefore we may still be in the nested state after that function ran. This patch changes the nested_svm_intr() function to return wether the irq window could be enabled. Cc: stable@kernel.org Signed-off-by: Joerg Roedel --- arch/x86/kvm/svm.c | 17 ++++++++--------- 1 files changed, 8 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 041ef6f..7c96b8b 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1389,16 +1389,17 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, return nested_svm_exit_handled(svm); } -static inline int nested_svm_intr(struct vcpu_svm *svm) +/* This function returns true if it is save to enable the irq window */ +static inline bool nested_svm_intr(struct vcpu_svm *svm) { if (!is_nested(svm)) - return 0; + return true; if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) - return 0; + return true; if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) - return 0; + return false; svm->vmcb->control.exit_code = SVM_EXIT_INTR; @@ -1411,10 +1412,10 @@ static inline int nested_svm_intr(struct vcpu_svm *svm) */ svm->nested.exit_required = true; trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); - return 1; + return false; } - return 0; + return true; } static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa) @@ -2562,13 +2563,11 @@ static void enable_irq_window(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); - nested_svm_intr(svm); - /* In case GIF=0 we can't rely on the CPU to tell us when * GIF becomes 1, because that's a separate STGI/VMRUN intercept. * The next time we get that intercept, this function will be * called again though and we'll get the vintr intercept. */ - if (gif_set(svm)) { + if (gif_set(svm) && nested_svm_intr(svm)) { svm_set_vintr(svm); svm_inject_irq(svm, 0x0); } -- 1.6.6