From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57877) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YDCqw-0001Vi-Jw for qemu-devel@nongnu.org; Mon, 19 Jan 2015 08:58:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YDCqt-0003KI-FL for qemu-devel@nongnu.org; Mon, 19 Jan 2015 08:58:50 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50257) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YDCqt-0003K5-85 for qemu-devel@nongnu.org; Mon, 19 Jan 2015 08:58:47 -0500 Date: Mon, 19 Jan 2015 15:58:40 +0200 From: "Michael S. Tsirkin" Message-ID: <20150119135840.GA2527@redhat.com> References: <1421659723-2496-1-git-send-email-tiejun.chen@intel.com> <1421659723-2496-8-git-send-email-tiejun.chen@intel.com> <1421668638.3610.23.camel@nilsson.home.kraxel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1421668638.3610.23.camel@nilsson.home.kraxel.org> Subject: Re: [Qemu-devel] [v6][PATCH 07/10] xen, gfx passthrough: register a isa bridge List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: allen.m.kay@intel.com, qemu-devel@nongnu.org, aliguori@amazon.com, pbonzini@redhat.com, yang.z.zhang@intel.com, Tiejun Chen , rth@twiddle.net On Mon, Jan 19, 2015 at 12:57:18PM +0100, Gerd Hoffmann wrote: > On Mo, 2015-01-19 at 17:28 +0800, Tiejun Chen wrote: > > Currently IGD drivers always need to access PCH by 1f.0. But we > > Obvious question: q35? > > q35 already has a isa bridge @ 0x1f.0. Guess that needs to be extended > for the pass-through then (simliar to the host bridge) instead of adding > a dummy bridge. > > Also: again xen naming here. > > cheers, > Gerd This hack probably doesn't have a chance to work well for q35 due to the above conflict. Happily future cards won't need it. -- MST