From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Graphics pass-through Date: Wed, 11 May 2011 14:23:51 +0300 Message-ID: <4DCA71C7.4070502@redhat.com> References: <4D415D70.8070105@web.de> <1296175554.2891.29.camel@x201> <4DC264CD.9080700@siemens.com> <1304608642.3081.35.camel@x201> <4DC7CCB3.8030607@siemens.com> <4DC807E3.4080706@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Prasad Joshi , Alex Williamson , =?ISO-8859-1?Q?Andr=E9_Weidemann?= , "kvm@vger.kernel.org" , Oswaldo Cadenas , Maxim Nikolaev To: Jan Kiszka Return-path: Received: from mx1.redhat.com ([209.132.183.28]:35488 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753890Ab1EKQR0 (ORCPT ); Wed, 11 May 2011 12:17:26 -0400 In-Reply-To: <4DC807E3.4080706@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: On 05/09/2011 06:27 PM, Jan Kiszka wrote: > To avoid having to deal with legacy I/O forwarding, we started with a > dual adapter setup in the hope to leave the primary guest adapter at > know-to-work cirrus-vga. But already in a native setup with on-board > primary + NVIDIA secondary, the NVIDIA Windows drivers refused to talk > to its hardware in this constellation. IIRC one issue with nvidia is that it uses non-BAR registers to move its PCI BAR around, which causes cpu writes to hit empty space. One way to see if this is the problem is to trace mmio that misses both kvm internal devices and qemu devices. -- error compiling committee.c: too many arguments to function