From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: regression in v3.9? a guest stuck in BIOS if emulate_invalid_guest_state=Y Date: Tue, 7 May 2013 18:04:15 +0300 Message-ID: <20130507150415.GC7899@redhat.com> References: <5188CF8B.8040809@ce.jp.nec.com> <20130507103520.GL12349@redhat.com> <5188DFF7.1090808@ce.jp.nec.com> <20130507120611.GM12349@redhat.com> <518913BE.8060300@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Jun'ichi Nomura" , kvm@vger.kernel.org To: Paolo Bonzini Return-path: Received: from mx1.redhat.com ([209.132.183.28]:3954 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752781Ab3EGPET (ORCPT ); Tue, 7 May 2013 11:04:19 -0400 Content-Disposition: inline In-Reply-To: <518913BE.8060300@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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.