Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754285AbaLVLEd (ORCPT ); Mon, 22 Dec 2014 06:04:33 -0500 Received: from mga11.intel.com ([192.55.52.93]:58665 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754051AbaLVLEc convert rfc822-to-8bit (ORCPT ); Mon, 22 Dec 2014 06:04:32 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,623,1413270000"; d="scan'208";a="627642311" From: "Wu, Feng" To: Paolo Bonzini , "Zhang, Yang Z" , 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 , "Wu, Feng" Subject: RE: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Thread-Topic: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Thread-Index: AQHQHcm59RgV+7h/5Ui6lHzT31JJLZybcbcw Date: Mon, 22 Dec 2014 11:04:25 +0000 Message-ID: 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> <549576C7.4030800@redhat.com> <5497E41F.50301@redhat.com> In-Reply-To: <5497E41F.50301@redhat.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Paolo Bonzini [mailto:pbonzini@redhat.com] > Sent: Monday, December 22, 2014 5:28 PM > To: Wu, Feng; Zhang, Yang Z; 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 > > > > On 22/12/2014 05:48, Wu, Feng wrote: > > Do you mean we don't support Lowest priority interrupts? As I mentioned > before, > > Lowest priority interrupts is widely used in Linux, so I think supporting lowest > priority > > interrupts is very important for Linux guest OS. Do you have any > ideas/suggestions about > > how to support Lowest priority interrupts for PI? Thanks a lot! > > Can you support them only if the destination is a single CPU? Sorry, I am not quite understand this. I still don't understand the "single CPU" here. Lowest priority interrupts always have a cpumask which contains multiple CPU. Thanks, Feng > > 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/