Re: regression in v3.9? a guest stuck in BIOS if emulate_invalid_guest_state=Y

[Gleb Natapov <gleb@redhat.com>]

On Tue, May 07, 2013 at 04:46:22PM +0200, Paolo Bonzini wrote:
> Il 07/05/2013 14:06, Gleb Natapov ha scritto:
> > On Tue, May 07, 2013 at 08:05:27PM +0900, Jun'ichi Nomura wrote:
> >> On 05/07/13 19:35, Gleb Natapov wrote:
> >>> On Tue, May 07, 2013 at 06:55:23PM +0900, Jun'ichi Nomura wrote:
> >>>> Hello,
> >>>>
> >>>> With v3.9 kernel and Nehalem CPU (i.e. unrestricted_guest=N),
> >>>> a guest stuck during boot (seemingly in BIOS).
> >>>> When setting emulate_invalid_guest_state=0, it does boot.
> >>>> (With v3.8 kernel and older, the guest used to boot fine by default.)
> >>>>
> >>>> The userspace is qemu-kvm of RHEL6.
> >>>> It seems the guest boots up fine with upstream qemu 1.4.1.
> >>>>
> >>>> Is this a kernel bug? Or is the userspace just too old to run on v3.9?
> >>>>
> >>>>
> >>> It should work. What seabios version are you using?
> >>
> >> It's seabios-0.6.1.2-26.el6.
> >> (and qemu-kvm-0.12.1.2-2.355.el6)
> >>
> > Works for me, but it looks like in your case the bios is in option rom.
> 
> What version of vgabios, too?
> 
Heh, good call, actually he uses sgabios. It is right there in the output :). Need
to try that.

> > What are you booting from? What's the qemu command line?
> > 
> > What is the output of "virsh qemu-monitor-command vm12 --hmp x/i $pc"
> > when it hangs?
> 
> Paolo

--
			Gleb.