Re: Installation of Windows 8 hangs with KVM

[Gleb Natapov <gleb@redhat.com>]

On Mon, Jan 07, 2013 at 09:13:37AM +0000, Ren, Yongjie wrote:
> > -----Original Message-----
> > From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org]
> > On Behalf Of Gleb Natapov
> > Sent: Monday, January 07, 2013 4:54 PM
> > To: Ren, Yongjie
> > Cc: Stefan Pietsch; kvm@vger.kernel.org
> > Subject: Re: Installation of Windows 8 hangs with KVM
> > 
> > On Mon, Jan 07, 2013 at 08:38:59AM +0000, Ren, Yongjie wrote:
> > > > -----Original Message-----
> > > > From: kvm-owner@vger.kernel.org
> > [mailto:kvm-owner@vger.kernel.org]
> > > > On Behalf Of Stefan Pietsch
> > > > Sent: Monday, January 07, 2013 2:25 AM
> > > > To: Gleb Natapov
> > > > Cc: kvm@vger.kernel.org
> > > > Subject: Re: Installation of Windows 8 hangs with KVM
> > > >
> > > > * Gleb Natapov <gleb@redhat.com> [2013-01-06 11:11]:
> > > > > On Fri, Jan 04, 2013 at 10:58:33PM +0100, Stefan Pietsch wrote:
> > > > > > Hi all,
> > > > > >
> > > > > > when I run KVM with this command the Windows 8 installation
> > stops
> > > > with
> > > > > > error code 0x0000005D:
> > > > > > kvm -m 1024 -hda win8.img -cdrom windows_8_x86.iso
> > > > > >
> > > > > > After adding the option "-cpu host" the installation proceeds to a
> > black
> > > > > > screen and hangs.
> > > > > >
> > > > > > With Virtualbox the installation succeeds.
> > > > > > The host CPU is an Intel Core Duo L2400.
> > > > > >
> > > > > > Do you have any suggestions?
> > > > > >
> > > > > >
> > > > > What is your kernel/qemu version?
> > > >
> > > > I'm using Debian unstable.
> > > >
> > > > qemu-kvm 1.1.2+dfsg-3
> > > > Linux version 3.2.0-4-686-pae (debian-kernel@lists.debian.org) (gcc
> > > > version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.35-2
> > > >
> > > you met issue only for 32bit Win8 (not 64 bit Win8), right?
> > > I think it's the same issue as the below bug I reported.
> > > https://bugs.launchpad.net/qemu/+bug/1007269
> > > You can try with '-cpu coreduo' or '-cpu core2duo' in qemu-kvm command
> > line.
> > >
> > > This should be a known issue which is caused by missing 'SEP' CPU flag.
> > > See another bug in Redhat bugzilla.
> > > https://bugzilla.redhat.com/show_bug.cgi?id=821741
> > >
> > That was RHEL kernel bug. Doubt Debian one has it.
> > 
> I don't think so. It should be a qemu bug (also described in that RHEL bugzilla).
https://bugzilla.redhat.com/show_bug.cgi?id=821463 is the kernel one.

> In my SandyBridge platform, 32bit Win8 guest can boot up with '-cpu SandyBridge,+sep' in qemu-kvm CLI.
> But it can't boot up with '-cpu SandyBridge'.
> 
Which qemu version? Master has sep in SandyBridge definition. In any
case -cpu host should have sep enabled.

--
			Gleb.