linux-kernel - Re: GPF in intel_pmu_lbr_reset() with qemu -cpu host

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Message-ID: <532CD8A9.5080603@zytor.com>
Date:	Fri, 21 Mar 2014 17:26:17 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Peter Wu <peter@...ensteyn.nl>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: GPF in intel_pmu_lbr_reset() with qemu -cpu host

On 03/21/2014 05:22 PM, Andi Kleen wrote:
>> Actually, Ingo, Borislav and I have been discussing making rdmsr_safe()
>> more of the default, especially for things like this where the error
>> handling is obvious (doesn't work?  Disable the PMU.)
> 
> That would be completely wrong. KVM has a full architectural perfmon PMU,
> just no model specific extensions like LBR.
> 

s/PMU/PMU extension in question/

	-hpa


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