From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [v5][PATCH 0/5] xen: add Intel IGD passthrough support Date: Wed, 25 Jun 2014 15:53:30 +0200 Message-ID: <53AAD45A.5090905@redhat.com> References: <53AA8E7D.809@intel.com> <20140625090925.GH32652@redhat.com> <53AA9480.1010005@intel.com> <53AA96DF.6070501@redhat.com> <53AA9B58.6050803@intel.com> <20140625095533.GE6357@redhat.com> <53AA9D79.3080003@redhat.com> <53AA9F3A.5030004@intel.com> <20140625102119.GJ6357@redhat.com> <53AABC81.2090206@redhat.com> <20140625134727.GB14578@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140625134727.GB14578@redhat.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: "Michael S. Tsirkin" 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, anthony.perard@citrix.com, anthony@codemonkey.ws, yang.z.zhang@intel.com, "Chen, Tiejun" List-Id: xen-devel@lists.xenproject.org Il 25/06/2014 15:47, Michael S. Tsirkin ha scritto: > OK, so how about doing this: either for the ISA > bridge, or for the VGA card itself: > > set subsystem vendor id to PCI_VENDOR_ID_XEN, > set subsystem device id to PCH device id That would work, but the same problem would then arise for the MCH. The driver there is banging at random places in the configuration space. This is why I asked for a solution that is future-proof, and since you can make one that works for both MCH and PCH it is nice to do the work just once. Paolo