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Message-ID: <1404441362.25056.2.camel@concordia>
Subject: Re: [PATCH 3/3] powerpc/perf: Clear MMCR2 when enabling PMU
From: Michael Ellerman <mpe@ellerman.id.au>
To: Joel Stanley <joel@jms.id.au>
Date: Fri, 04 Jul 2014 12:36:02 +1000
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On Thu, 2014-07-03 at 15:42 +0930, Joel Stanley wrote:
> On POWER8 when switching to a KVM guest we set bits in MMCR2 to freeze
> the PMU counters. Aside from on boot they are then never reset,
> resulting in stuck perf counters for any user in the guest or host.

Cc: stable@vger.kernel.org
Fixes: e05b9b9e5c10 ("powerpc/perf: Power8 PMU support")
Acked-by: Michael Ellerman <mpe@ellerman.id.au>

cheers