From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38698) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wzhse-0001pA-BI for qemu-devel@nongnu.org; Wed, 25 Jun 2014 03:44:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WzhsT-00024d-V3 for qemu-devel@nongnu.org; Wed, 25 Jun 2014 03:44:32 -0400 Received: from mail-wg0-x231.google.com ([2a00:1450:400c:c00::231]:48522) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzhsT-00024T-OU for qemu-devel@nongnu.org; Wed, 25 Jun 2014 03:44:21 -0400 Received: by mail-wg0-f49.google.com with SMTP id y10so1540662wgg.8 for ; Wed, 25 Jun 2014 00:44:20 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <53AA7DCE.2030100@redhat.com> Date: Wed, 25 Jun 2014 09:44:14 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1403662641-28526-1-git-send-email-tiejun.chen@intel.com> <53AA69E7.8050406@redhat.com> <53AA7BD7.1080309@intel.com> In-Reply-To: <53AA7BD7.1080309@intel.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: "Chen, Tiejun" , anthony.perard@citrix.com, stefano.stabellini@eu.citrix.com, mst@redhat.com, Kelly.Zytaruk@amd.com Cc: peter.maydell@linaro.org, xen-devel@lists.xensource.com, allen.m.kay@intel.com, qemu-devel@nongnu.org, anthony@codemonkey.ws, yang.z.zhang@intel.com 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