Re: good progress on pci vga passthrough in xen-3.4-rc1

[Stefano Stabellini <stefano.stabellini@eu.citrix.com>]

Tim Moore wrote:

> Hi Bryan
> 
>  
> 
> I think my email to Peter along with emails from probably yourself and
> other people in the community is what prompted his reply to xen-users.
> 
>  
> 
> There seems to be a general reluctance to move this forwards within the
> Xen developers, I think this may be due to the current status of some of
> the commercial vendors that are working on the “next big thing” for
> Virtualisation. Neocleus and XCI seem to be the products that will bring
> this to market.. it seems that the open source community may be being
> left out at this stage!?
> 

Come on, XCI sources are fully open source and available on the web!

The plain truth is that graphic card passtrough doesn't always work at
the moment, most of the problems come from the rexecution of the vga
bios (or the lack of thereof).
You can read the workaround we have in place in XCI in
tools/libxc/xc_hvm_build.c:setup_vga_pt, but even that one doesn't work
all the times.