From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 9/9] KVM: Simplify test for interrupt window Date: Fri, 05 Jan 2007 07:58:45 -0000 Message-ID: <20070105075845.EAFEA250048@il.qumranet.com> References: <459E02E7.5020407@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: akpm-3NddpPZAyC0@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org In-Reply-To: <459E02E7.5020407-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org No need to test for rflags.if as both VT and SVM specs assure us that on exit caused from interrupt window opening, 'if' is set. Signed-off-by: Dor Laor Signed-off-by: Avi Kivity Index: linux-2.6/drivers/kvm/svm.c =================================================================== --- linux-2.6.orig/drivers/kvm/svm.c +++ linux-2.6/drivers/kvm/svm.c @@ -1206,8 +1206,7 @@ static int interrupt_window_interception * possible */ if (kvm_run->request_interrupt_window && - !vcpu->irq_summary && - (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF)) { + !vcpu->irq_summary) { ++kvm_stat.irq_window_exits; kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; return 0; Index: linux-2.6/drivers/kvm/vmx.c =================================================================== --- linux-2.6.orig/drivers/kvm/vmx.c +++ linux-2.6/drivers/kvm/vmx.c @@ -1604,8 +1604,7 @@ static int handle_interrupt_window(struc * possible */ if (kvm_run->request_interrupt_window && - !vcpu->irq_summary && - (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF)) { + !vcpu->irq_summary) { kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; ++kvm_stat.irq_window_exits; return 0; ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV