[Lguest] lguest: unhandled trap 13

[Rusty Russell]

On Thu, 11 Feb 2010 07:30:06 am Avi Kivity wrote:
> On 02/10/2010 04:33 AM, Rusty Russell wrote:
> > Note that lguest doesn't run under kvm (I should really file a kvm bug)
> 
> Yes please.
> 
> How does it fail?

I was hoping to get cycles to look at it myself.

Host (ie Linux inside kvm) doesn't see #GP when guest (lguest, Linux ring 1)
invokes KVM_HYPERCALL.  Guest continues execution after hypercall.

One solution would be to return to lguest-specific hypercall mechanism, but
the faux commonality is cute.

Ubuntu latest, 32 bit:
rusty at vivaldi:/var/log$ kvm --version
QEMU PC emulator version 0.11.0 (qemu-kvm-0.11.0), Copyright (c) 2003-2008 Fabrice Bellard
rusty at vivaldi:/var/log$ uname -a
Linux vivaldi 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 i686 GNU/Linux

Thanks,
Rusty.