From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [v2 24/25] KVM: Suppress posted-interrupt when 'SN' is set Date: Wed, 3 Dec 2014 15:39:53 +0800 Message-ID: <1417592394-24343-25-git-send-email-feng.wu@intel.com> References: <1417592394-24343-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org Currently, we don't support urgent interrupt, all interrupts are recognized as non-urgent interrupt, so we cannot send posted-interrupt when 'SN' is set. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 11 +++++++++-- 1 files changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index dc6fd84..6b2f3e7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4306,15 +4306,22 @@ static int vmx_vm_has_apicv(struct kvm *kvm) static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { struct vcpu_vmx *vmx = to_vmx(vcpu); - int r; + int r, sn; if (pi_test_and_set_pir(vector, &vmx->pi_desc)) return; + /* + * Currently, we don't support urgent interrupt, all interrupts + * are recognized as non-urgent interrupt, so we cannot send + * posted-interrupt when 'SN' is set. + */ + sn = pi_test_sn(&vmx->pi_desc); + r = pi_test_and_set_on(&vmx->pi_desc); kvm_make_request(KVM_REQ_EVENT, vcpu); #ifdef CONFIG_SMP - if (!r && (vcpu->mode == IN_GUEST_MODE)) + if (!r && !sn && (vcpu->mode == IN_GUEST_MODE)) apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), POSTED_INTR_VECTOR); else -- 1.7.1