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Date: Sat, 22 Mar 2014 01:22:44 +0100
From: Andi Kleen <andi@firstfloor.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>, Peter Wu <peter@lekensteyn.nl>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>,
        linux-kernel@vger.kernel.org
Subject: Re: GPF in intel_pmu_lbr_reset() with qemu -cpu host
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> 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.

-Andi


-- 
ak@linux.intel.com -- Speaking for myself only.