From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Tramnitz <chris.ace@gmx.net>
Subject: Re: Xen VGA graphics passthrough for secondary adapters, vBAR=pBAR
 etc
Date: Mon, 12 Apr 2010 11:44:45 +0200
Message-ID: <hpuq4h$mg4$1@dough.gmane.org>
References: <20100412072119.GW1878@reaktio.net>
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12.04.2010 09:21, Pasi K=E4rkk=E4inen wrote:
> Hello,
>
> Now that Xen 4.0.0 is out and has support for primary graphics passthru
> and many people have been using it already and asking for a status upda=
te
> for secondary adapter passthru I thought of opening a new thread about =
this.
>
> What are the actual issues that need to be resolved to get the
> secondary graphics passthru working? Probably related to VGA BIOS execu=
tion
> in the guest?
>
> How about the vBAR=3DpBAR stuff required for some (Nvidia) cards?
> How do we get that functionality integrated so people don't need additi=
onal patches?
>
> Was there also a problem that a working VGA BIOS cannot be copied from =
some cards
> and they need to use/load it from a file?
>
> Thanks!
>
> -- Pasi
>
> btw. I've created a wiki page where we can list all the tested/working =
graphics adapters:
> http://wiki.xensource.com/xenwiki/XenVGAPassthroughTestedAdapters


I already added that suggestion to the 4.1 suggested features some days=20
ago and planned to rebase the patches to 4.0 if they need any adjustments=
.
One major change I'd like to see is dynamic (and thus optional)=20
configuration of the mem space to be mapped and the BIOS file to be used=20
(instead of configuration at compile time).
Also afair the previous patch set also had a maximum size (correct me if=20
I'm wrong) for the BIOS size that was to small for recent (HD4800+) ATI=20
devices.


Best regards,
    Christian