From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37866) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTCXL-0003Kd-66 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 12:57:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aTCXI-0004Ga-12 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 12:57:15 -0500 Received: from mail-wm0-x241.google.com ([2a00:1450:400c:c09::241]:33962) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTCXH-0004GW-R1 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 12:57:11 -0500 Received: by mail-wm0-x241.google.com with SMTP id p63so4852772wmp.1 for ; Tue, 09 Feb 2016 09:57:11 -0800 (PST) Sender: Paolo Bonzini References: <1436938670-7677-1-git-send-email-tiejun.chen@intel.com> <1436938670-7677-4-git-send-email-tiejun.chen@intel.com> <20160208203235.69088310@t450s.home> <20160209104332.775b88f8@t450s.home> From: Paolo Bonzini Message-ID: <56BA286B.2050603@redhat.com> Date: Tue, 9 Feb 2016 18:56:59 +0100 MIME-Version: 1.0 In-Reply-To: <20160209104332.775b88f8@t450s.home> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [v10][PATCH 03/10] piix: create host bridge to passthrough List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alex Williamson Cc: ehabkost@redhat.com, stefano.stabellini@eu.citrix.com, mst@redhat.com, "Kay, Allen M" , qemu-devel@nongnu.org, rth@twiddle.net On 09/02/2016 18:43, Alex Williamson wrote: > Tiejun's email bounced, so adding Allen for comment. Host bridge > registers 52h, a4h, and a8h seem to be for versions of IGD prior to > SandyBridge or just wrong. Even the GMCH (50h) doesn't seem to be > necessary for the VM host bridge, so I'm thinking about dropping all of > these for vfio-based IGD assignment. Do we know which guest drivers > have specific dependencies on which host bridge and LPC bridge > registers? It would even be nice to document the standard > registers for future maintainability. Thanks, I remember asking Tiejun for the same, but that was a year ago or more. :( Paolo