From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Subject: Re: [PATCH] KVM: PPC: emulate dcbst
Date: Wed, 10 Apr 2013 11:03:33 -0500
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Cc: "agraf@suse.de" <agraf@suse.de>,
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To: Yoder Stuart-B08248 <B08248@freescale.com>
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In-Reply-To: <9F6FE96B71CF29479FF1CDC8046E15035A6DD9@039-SN1MPN1-003.039d.mgd.msft.net>
	(from B08248@freescale.com on Tue Apr  9 22:20:41 2013)
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On 04/09/2013 10:20:41 PM, Yoder Stuart-B08248 wrote:
> > -----Original Message-----
> > From: Yoder Stuart-B08248
> > Sent: Tuesday, April 09, 2013 3:36 PM
> > To: agraf@suse.de
> > Cc: kvm-ppc@vger.kernel.org; kvm@vger.kernel.org; Yoder  
> Stuart-B08248
> > Subject: [PATCH] KVM: PPC: emulate dcbst
> >
> > From: Stuart Yoder <stuart.yoder@freescale.com>
> >
> > Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
> > ---
> 
> One thing I should have mentioned...without this patch
> on the host 64-bit guest kernels are currently broken
> when using -smp.  Not sure how far back things are broken,
> the oldest kernel I had a chance to try was like 3.8-rc3.

It's due to dcbst being used on the spin table, which is treated as  
emulated MMIO under QEMU.

-Scott