Re: [Xen-users] A port of Windows XP was developed for an earlier version of Xen

[Anthony Liguori <aliguori@xxxxxxxxxx>]

colinux runs linux as essentially a thread within the windows kernel.  
Both execute in ring 0 and there is no protection.  It's fundamentally 
incompatible with Xen.
An interesting thing to do would be to port qvm86 to Xen and create a 
domU initrd that just contained qemu.  This would let you run Windows 
(albiet with a performance impact) on Xen without VT/SVM.
Regards,

Anthony Liguori

Wesley Parish wrote:

> In relation to this, has anyone considered using the colinux hacks?  They're 
> essentially a set of XP device drivers, IIRC.
> Wesley Parish
>
> On Mon, 30 Jan 2006 14:37, Mark Williamson wrote:
>  
>
> > > Following on from the previous discussions about Microsoft
> > > products working under Xen, what is the status of the work
> > > done on the XP port?
> > >      
> > The XP port was written for Xen 1.0, which was quite different in a number
> > of respects.
> >
> >    
> >
> > > Clearly the full port would not be available but I presume
> > > that some driver support may have been developed for the port
> > > to work.
> > >      
> > I've not seen the code, but I imagine there is driver code that could be
> > reused.  Exactly how useful it'd be is not clear: the Xen driver interfaces
> > have changed a bit since then, although there would still be some
> > commonality.
> >
> >    
> >
> > > What is that status and availability of the driver support
> > > to enable it under Xen?
> > >      
> > Work is underway to make the paravirtualised device drivers run under
> > otherwise fully-virtualised Linux.  Once the implementation approach has
> > been agreed upon and completed, somebody should (in principle) be able to
> > apply the same approach to Windows.  This could usefully employ the drivers
> > from the original port, but there's still going to be a load of work
> > implementing stuff like a XenStore interface, grant tables support, etc.
> >
> > Cheers,
> > Mark
> >    
>  

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