From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sheng Yang Subject: Re: PCI pass-through: guest can't map memory Date: Mon, 12 Jan 2009 15:54:46 +0800 Message-ID: <200901121554.47609.sheng@linux.intel.com> References: <20090111011242.38870e46@sbs173> <20090111043512.GA23652@yukikaze> <20090111145915.08d296bc@sbs173> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Cc: Harald Braumann , Sheng Yang , Joerg Rodel To: kvm@vger.kernel.org Return-path: Received: from mga12.intel.com ([143.182.124.36]:13660 "EHLO azsmga102.ch.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751468AbZALHyx (ORCPT ); Mon, 12 Jan 2009 02:54:53 -0500 In-Reply-To: <20090111145915.08d296bc@sbs173> Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: On Sunday 11 January 2009 21:59:15 Harald Braumann wrote: > On Sun, 11 Jan 2009 12:35:12 +0800 > > Sheng Yang wrote: > > On Sun, Jan 11, 2009 at 01:12:42AM +0100, Harald Braumann wrote: > > > Hi! > > > > > > (please CC me, as I'm not subscribed) > > > > > > I try to give the guest (Windows XP) direct access to one of the > > > graphics adaptors. > > > [...] > > > > Hi Harry > > > > I think we at least have one issue here: currently we can't support > > graphics card assignment... Graphics card is more complex than others > > due to video bios we must support. So it's not mature now (for both > > KVM and Xen). Please wait for our future releases(though I have no > > idea when it would be supported, maybe several monthes or > > longer... :( ). > > Hi, > > thanks for the reply. I've found this on that matter: > http://thread.gmane.org/gmane.comp.emulators.kvm.devel/26785/focus=26971 > (device-assignment code doesn't update the cards BAR). Is that the > problem, you're talking about? Or is there something else that's still > missing? So I know what to look for in the changelogs. > Hi Harry The thread is talking about option ROM, which offer extra function on some PCI card, but not video BIOS which is basic component for the graphics card... Currently we are using emulated Cirrus 54xx by default, as well as it's video BIOS. Device assignment's video BIOS support would still miss in a period... We would say explicit that we have supported graphics card after we enable it. :) -- regards Yang, Sheng