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

[Paul Brook]

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> 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.

Paul