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Re: [Xen-devel] [PATCH] Calculate correct instruction length for data-fa

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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