From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [Xen-devel] [PATCH 2/2] xen:i386:pc_piix: create isa bridge specific to IGD passthrough Date: Mon, 03 Nov 2014 12:35:10 +0100 Message-ID: <5457686E.7020601@redhat.com> References: <20140901060506.GA20186@redhat.com> <54042514.6090206@intel.com> <003AAFE53969E14CB1F09B6FD68C3CD478F16D2A@ORSMSX101.amr.corp.intel.com> <54277979.7070408@intel.com> <20140929100111.GA32459@redhat.com> <542A18BD.2060008@intel.com> <20141007072653.GB2424@redhat.com> <543622CC.6050807@intel.com> <20141012095021.GC9567@redhat.com> <544A0174.7000003@intel.com> <20141024134747.GA6024@redhat.com> <5451ED1E.1000300@intel.com> <5457335B.1000308@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5457335B.1000308@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org To: "Chen, Tiejun" , "Michael S. Tsirkin" Cc: "xen-devel@lists.xensource.com" , "qemu-devel@nongnu.org" List-Id: xen-devel@lists.xenproject.org On 03/11/2014 08:48, Chen, Tiejun wrote: >>>>> I think the point was mostly to reserve 1f to prevent >>>>> devices from using it. >>>>> As we populate slots in order it doesn't seem to important ... >>>> >>>> If we populate slot at !1f GFX driver can't find this ISA bridge. >>> >>> Right, but I mean if no special options are used, 1f will typically >>> stay free without any effort on our side. >> >> Yeah. >> >> Actually based on current info we know, seems 1f is just specific to our >> scenario :) So I always think we can occupy that. But Paolo and you can >> really determine this point. > > What's your idea? I do not have any objection to always occupying 1f for Xen IGD passthrough. Paolo