From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756132AbcAYJO3 (ORCPT ); Mon, 25 Jan 2016 04:14:29 -0500 Received: from mga01.intel.com ([192.55.52.88]:54785 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751452AbcAYJMt (ORCPT ); Mon, 25 Jan 2016 04:12:49 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,343,1449561600"; d="scan'208";a="888618359" From: Feng Wu To: pbonzini@redhat.com, rkrcmar@redhat.com Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Feng Wu Subject: [PATCH v4 1/4] KVM: Recover IRTE to remapped mode if the interrupt is not single-destination Date: Mon, 25 Jan 2016 16:53:32 +0800 Message-Id: <1453712015-3989-2-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1453712015-3989-1-git-send-email-feng.wu@intel.com> References: <1453712015-3989-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When the interrupt is not single destination any more, we need to change back IRTE to remapped mode explicitly. Signed-off-by: Feng Wu --- v4: - Don't need to Set SN before changing back to remapped mode arch/x86/kvm/vmx.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e2951b6..a4b4aa4 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10764,8 +10764,21 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq, */ kvm_set_msi_irq(e, &irq); - if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) + if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) { + /* + * Make sure the IRTE is in remapped mode if + * we don't handle it in posted mode. + */ + ret = irq_set_vcpu_affinity(host_irq, NULL); + if (ret < 0) { + printk(KERN_INFO + "failed to back to remapped mode, irq: %u\n", + host_irq); + goto out; + } + continue; + } vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu)); vcpu_info.vector = irq.vector; -- 2.1.0