From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49315) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wzibz-0001O4-6e for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:31:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wzibq-0001Yg-To for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:31:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1378) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wzibq-0001YH-Mk for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:31:14 -0400 Date: Wed, 25 Jun 2014 11:31:21 +0300 From: "Michael S. Tsirkin" Message-ID: <20140625083121.GC32652@redhat.com> References: <1403662641-28526-1-git-send-email-tiejun.chen@intel.com> <53AA69E7.8050406@redhat.com> <53AA7BD7.1080309@intel.com> <53AA7DCE.2030100@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53AA7DCE.2030100@redhat.com> Subject: Re: [Qemu-devel] [v5][PATCH 0/5] xen: add Intel IGD passthrough support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: peter.maydell@linaro.org, xen-devel@lists.xensource.com, stefano.stabellini@eu.citrix.com, allen.m.kay@intel.com, Kelly.Zytaruk@amd.com, qemu-devel@nongnu.org, yang.z.zhang@intel.com, anthony@codemonkey.ws, anthony.perard@citrix.com, "Chen, Tiejun" On Wed, Jun 25, 2014 at 09:44:14AM +0200, Paolo Bonzini wrote: > Il 25/06/2014 09:35, Chen, Tiejun ha scritto: > >>How are you going to make this work for Q35 or another PCIe machine that > >>already has an ISA bridge at 00:1f.0? > >> > > > >Could we simply pass the vendor/device ids of the host ISA bridge here? > > No, because the firmware then would not recognize the host ISA bridge and > would fail to initialize the ACPI PMBASE, the PCI interrupt routing, etc. > > Paolo It might be possible to move the Q35 bridge elsewhere. seabios doesn't care where the host bridge is. ACPI tables in QEMU can be adjusted. From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [v5][PATCH 0/5] xen: add Intel IGD passthrough support Date: Wed, 25 Jun 2014 11:31:21 +0300 Message-ID: <20140625083121.GC32652@redhat.com> References: <1403662641-28526-1-git-send-email-tiejun.chen@intel.com> <53AA69E7.8050406@redhat.com> <53AA7BD7.1080309@intel.com> <53AA7DCE.2030100@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <53AA7DCE.2030100@redhat.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Paolo Bonzini Cc: peter.maydell@linaro.org, xen-devel@lists.xensource.com, stefano.stabellini@eu.citrix.com, allen.m.kay@intel.com, Kelly.Zytaruk@amd.com, qemu-devel@nongnu.org, yang.z.zhang@intel.com, anthony@codemonkey.ws, anthony.perard@citrix.com, "Chen, Tiejun" List-Id: xen-devel@lists.xenproject.org On Wed, Jun 25, 2014 at 09:44:14AM +0200, Paolo Bonzini wrote: > Il 25/06/2014 09:35, Chen, Tiejun ha scritto: > >>How are you going to make this work for Q35 or another PCIe machine that > >>already has an ISA bridge at 00:1f.0? > >> > > > >Could we simply pass the vendor/device ids of the host ISA bridge here? > > No, because the firmware then would not recognize the host ISA bridge and > would fail to initialize the ACPI PMBASE, the PCI interrupt routing, etc. > > Paolo It might be possible to move the Q35 bridge elsewhere. seabios doesn't care where the host bridge is. ACPI tables in QEMU can be adjusted.