From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: vga passthrough // questions about pci passthrough Date: Thu, 27 Sep 2012 14:46:51 -0600 Message-ID: <1348778811.2320.248.camel@ul30vt.home> References: <50064D87.2090809@adiumentum.com> <50068134.4060306@siemens.com> <5006A72D.3080408@adiumentum.com> <5006ADF3.9030304@adiumentum.com> <1342621405.2229.194.camel@bling.home> <50081FBC.7060208@adiumentum.com> <1342714590.3142.4.camel@ul30vt> <5064364E.7050508@adiumentum.com> <1348768586.2320.204.camel@ul30vt.home> <50649E5C.6020808@adiumentum.com> <1348773491.2320.217.camel@ul30vt.home> <5064AB09.9030402@adiumentum.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Martin Wolf Return-path: Received: from mx1.redhat.com ([209.132.183.28]:19395 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751704Ab2I0Uqy (ORCPT ); Thu, 27 Sep 2012 16:46:54 -0400 In-Reply-To: <5064AB09.9030402@adiumentum.com> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, 2012-09-27 at 21:37 +0200, Martin Wolf wrote: > when will that support be implemented? > how do i enable debug support for the "pci-assign" driver? I believe the target is qemu 1.3 for q35. Debug is enabled by uncommenting the DEVICE_ASSIGNMENT_DEBUG define in hw/kvm/pci-assign.c (or hw/device-assignment.c on qemu-kvm in an older tree) and rebuilding. Thanks, Alex > Am 27.09.2012 21:18, schrieb Alex Williamson: > > On Thu, 2012-09-27 at 20:43 +0200, Martin Wolf wrote: > >> thank you for the information. > >> > >> i will try what you mentioned... > >> do you have some additional information about rebooting a VM with a > >> passed through videocard? > >> (amd / ati 7870) > > I don't. Is the bsod on reboot only or does it also happen on shutdown? > > There's a slim chance it could be traced by enabling debug in the > > pci-assign driver and analyzing what the guest driver is trying to do. > > I'm hoping that q35 chipset support might resolve some issues with vga > > assignment as it exposes a topology that looks a bit more like one that > > a driver would expect on physical hardware. Thanks, > > > > Alex > > > > -- > > To unsubscribe from this list: send the line "unsubscribe kvm" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > >