Re: [Xen-users] xen0 under bochs

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Thanks Mark. I might try that. One other thing I considered was that
> the default Bochs compile uses a cpu-level of 5 (rather than a
> possible 6). Could this be relevant, I wonder?

As in an i586?  Absolutely - that won't work.  I'm surprised it got as far as 
it did, Xen shouldn't boot on pre i686 CPUs.  Maybe Bochs produces weird Cpu 
info.

I half-suspected this problem, hence my mention of switching CPU emulation - 
can you try this?  If you can emulate an i686 that *ought* to work.

Cheers,
Mark

> jon.
>
> On 8/2/05, Mark Williamson <mark.williamson@xxxxxxxxxxxx> wrote:
> > > I realise that this isn't an optimal configuration, but I have been
> > > trying to boot the
> > > Xen demo CD (2.0.6) under Bochs over Windows XP SP1.
> > >
> > > This is what happens:
> > >
> > > The Dom0 boot seems to proceed a fair way, then:
> > >
> > > (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
> > > input to Xen).
> > > (XEN) Domain 0 shutdown: rebooting machine.
> > >
> > > Can anyone give me some hints about why this might be happening or
> > > what I can do to get more diagnostics out of either Bochs or Xen?
> >
> > It seems likely that Bochs emulation isn't sufficient to cope with the
> > tricks Xen uses...  You might want to look at switches to get different
> > CPU emulations from Bochs.  You might also want to look at a debug build
> > of Xen (cd xen; make clean && make debug=y; cp xen.gz /boot/).  Report a
> > bug to the Bochs people if it really won't work.  Finally, if you're
> > completely stuck you might like to try QEmu - it should boot the Bochs
> > image happily.
> >
> > Cheers,
> > Mark

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