From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Guyader Subject: Re: Xen 4.0.0 first release candidate / graphics passthru Date: Thu, 21 Jan 2010 09:18:48 +0000 Message-ID: References: <20100112093245.GZ25902@reaktio.net> <20100121085407.GJ2861@reaktio.net> <20100121091215.GL2861@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20100121091215.GL2861@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: =?ISO-8859-1?Q?Pasi_K=E4rkk=E4inen?= Cc: "Mr. Teo En Ming (Zhang Enming)" , "xen-devel@lists.xensource.com" , weidong.han@intel.com, Keir Fraser List-Id: xen-devel@lists.xenproject.org 2010/1/21 Pasi K=E4rkk=E4inen : > On Thu, Jan 21, 2010 at 09:09:35AM +0000, Jean Guyader wrote: >> 2010/1/21 Pasi K=E4rkk=E4inen : >> > On Tue, Jan 12, 2010 at 10:05:12AM +0000, Keir Fraser wrote: >> >> On 12/01/2010 09:32, "Pasi K=E4rkk=E4inen" wrote: >> >> >> >> >>> Does 4.0 include gpu passthru features? If not are there any upda= ted >> >> >>> patches to try gpu passthru with 4.x? >> >> >> >> >> >> There is support (c/s 20144). >> >> >> >> >> > >> >> > Btw is it possible now to specify a file to load the VGA bios from? >> >> > earlier it was required to hardcode it into some header file or so. >> >> >> >> I think it is hardcoded that qemu will take a copy of the host system= 's BIOS >> >> (i.e., for the primary host VGA). Other options would be easy to impl= ement >> >> I'm sure, if someone's interested. >> >> >> > >> > I was just looking at same older mails, and it seems for example Teo E= n Ming >> > and others who got Xen VGA passthrough working had to copy the vgabios= -pt.bin >> > to tools/firmware/vgabios/ before building Xen. >> > >> > That's not very practical.. >> > >> >> Right now the code copy the bios from 0xC0000. So if you want to pass th= rough >> a secondary display adapter with the vga bios you are not copying the ri= ght one, >> that why this hack was for. >> Surely the code could be modified to add an option to copy the bios of >> the right card. >> > > Ok, thanks for the info. > > Do I remember correctly that there was a problem with copying the BIOS fr= om some cards, > or on some setups? And that's why the patch to load it from a file was ma= de? > Yes, I think that was because of that, and I'm not sure about the intel IGD but I think that was causing some issue. The code could have a cleanup and use sysfs to get the rombios, if I works with the intel graphic card I think we should do that. Jean