Re: [Xen-devel] [PATCH] Calculate correct instruction length for data-fault VM exits on VT-x systems

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30 Apr 2006, at 00:24, Leendert van Doorn wrote:

> > Xen-emulated devices could have their state fetched on demand -- it
> > ought to be rare that qemu-dm ends up emulating an access to such a
> > device. Or have qemu call down into Xen to emulate those accesses.
> > Having a device model duplicated in both Xen and qemu, and
> > synchronising between the two, sounds a bit sketchy.
> In the BIOS (realmode) these devices are initialized and the subsequent
> 32-bit code depends on the proper initialization. For the common I/O
> emulation case this should hopefully be rare.
How does this work now? Do we really have two copies of each device 
model? I doubt that's implemented safely.
 -- Keir


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