From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: KVM PMU virtualization
Date: Fri, 26 Feb 2010 16:14:08 +0100
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Cc: Ingo Molnar <mingo@elte.hu>,
	Jes Sorensen <Jes.Sorensen@redhat.com>,
	Joerg Roedel <joro@8bytes.org>,
	KVM General <kvm@vger.kernel.org>,
	Zachary Amsden <zamsden@redhat.com>,
	Gleb Natapov <gleb@redhat.com>, ming.m.lin@intel.com,
	"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Arjan van de Ven <arjan@infradead.org>,
	Fr??d??ric Weisbecker <fweisbec@gmail.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
To: Avi Kivity <avi@redhat.com>
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On Fri, 2010-02-26 at 16:53 +0200, Avi Kivity wrote:
> > If you give a full PMU to a guest it's a whole different dimension and quality
> > of information. Literally hundreds of different events about all sorts of
> > aspects of the CPU and the hardware in general.
> >    
> 
> Well, we filter out the bad events then. 

Which requires trapping the MSR access, at which point a soft-PMU is
almost there, right?