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Re: [qvm86-devel] Re: [Qemu-devel] kqemu in 0.7.2 no longer boots Xen

From: qemu
Subject: Re: [qvm86-devel] Re: [Qemu-devel] kqemu in 0.7.2 no longer boots Xen
Date: Mon, 12 Sep 2005 22:08:11 -0700 (PDT)

On Tue, 13 Sep 2005, Paul Brook wrote:

> [redirected to the appropriate list]
> > FWIW, I've also tried to get Xen running under qvm86 with no success.
> > The accelerator module generates an error part-way into the Linux boot
> > sequence (right after disk probing).
> >
> > dmesg shows that shadow faulting the GDT is failing but that's occuring
> > a bit before it bails out (according to the timestamps).
> Hmm, interesting. This implies it's running ring3 code before the guest 
> kernel 
> finishes booting. I wonder if it's using the sgdt instruction. This will give 
> incorrect results under qvm86.
> > I can provide a script that can take a built Xen tree and launchs qemu
> > with Xen automatically (you could provide an empty disk since it dies
> > long before it mounts the disk).  It's not as simple as just passing a
> > -kernel because Xen needs to be booted via multiboot.
> I can't promise anything, but a script would be helpful.

Might this be a step toward a solution of the qvm86/kqemu problem of w2k 
booting a SESSION5_INITIALIZATION_FAILURE on amd64?  Interestingly, people 
have reported that the open-source ReactOS implementation of NT gives the 
same BSOD.


Eric Wheeler
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