From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cyrill Gorcunov <gorcunov@openvz.org>
Subject: Re: perf uncore & lkvm woes
Date: Thu, 16 Aug 2012 11:16:33 +0400
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Cc: Sasha Levin <levinsasha928@gmail.com>,
	Asias He <asias.hejun@gmail.com>, Ingo Molnar <mingo@elte.hu>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	KVM General <kvm@vger.kernel.org>
To: Pekka Enberg <penberg@kernel.org>
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On Thu, Aug 16, 2012 at 11:07:43AM +0400, Cyrill Gorcunov wrote:
> On Thu, Aug 16, 2012 at 10:01:58AM +0300, Pekka Enberg wrote:
> > Hello,
> > [    0.248962] Pid: 0, comm: swapper/0 Not tainted 3.6.0-rc1+ #24
> > [penberg@tux ~]$ cat perf-kvmtool-issue
> > Hello,
> > 
> > Has anyone seen this? It's kvmtool/next with 3.6.0-rc1. Looks like we
> > are doing uncore_init() on virtualized CPU which breaks boot.
> 
> Hi, I guess some cpuid/msr bit is not cleared again ;) I'll take a look
> once time permit.

If only I'm not missing something we've two options 1) either tune up
cpu model via cpuid interception in lkvm (which is bad I think)
2) provide some new kernel boot line option to not use unboxed pmu.

	Cyrill