Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753118AbaLTNRJ (ORCPT ); Sat, 20 Dec 2014 08:17:09 -0500 Received: from mail-wi0-f170.google.com ([209.85.212.170]:47781 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753054AbaLTNRG (ORCPT ); Sat, 20 Dec 2014 08:17:06 -0500 Message-ID: <549576C7.4030800@redhat.com> Date: Sat, 20 Dec 2014 14:16:55 +0100 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 Newsgroups: gmane.comp.emulators.kvm.devel To: "Wu, Feng" , Paolo Bonzini , Yang Zhang , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "x86@kernel.org" , Gleb Natapov , "dwmw2@infradead.org" , "joro@8bytes.org" , Alex Williamson , Jiang Liu CC: "iommu@lists.linux-foundation.org" , "linux-kernel@vger.kernel.org" , KVM list , Eric Auger Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI References: <1418397300-10870-1-git-send-email-feng.wu@intel.com> <1418397300-10870-14-git-send-email-feng.wu@intel.com> <549307A5.3060305@redhat.com> <5494131E.9030505@redhat.com> In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20/12/2014 00:48, Wu, Feng wrote: > In my understanding, lowest priority interrupts are always delivered to a > Single CPU, we need to find the right destination CPU from the cpumask. Yes, but which CPU however differs every time the interrupt is delivered. So the emulation here is a bit poor. For now, please limit PI to fixed interrupts. > Actually, we don't support posting broadcast/multicast interrupts, because > the interrupt is associated with one Posted-interrupts descriptor, then one > vCPU. Understood. Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/