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 11:46:06 +0400
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Cc: "Yan, Zheng" <zheng.z.yan@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Sasha Levin <levinsasha928@gmail.com>,
	Asias He <asias.hejun@gmail.com>, Ingo Molnar <mingo@elte.hu>,
	KVM General <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>
To: Pekka Enberg <penberg@kernel.org>
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On Thu, Aug 16, 2012 at 10:41:53AM +0300, Pekka Enberg wrote:
> On 08/16/2012 03:19 PM, Peter Zijlstra wrote:
> >> On Thu, 2012-08-16 at 10:01 +0300, Pekka Enberg wrote:
> >>> 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.
> >>
> >> I think you're the first.. I don't normally use kvm if I can at all
> >> avoid it.
> >>
> >> But I think its a 'simple' matter of kvm not emulating the entire
> >> hardware. Afaik the uncore isn't enumerated and we simply assume MSR
> >> presence based on cpu model.
> 
> On Thu, Aug 16, 2012 at 10:38 AM, Yan, Zheng
> <zheng.z.yan@linux.intel.com> wrote:
> > The Intel uncore doc does not specify how to check if uncore exist.
> > How about disabling uncore on virtualized CPU?
> 
> (CC'ing Avi.)

Why not simply add bootline option for that? Would it be acceptible?

	Cyrill