From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 4 May 2009 17:04:09 +0000 (+0200)
Subject: perf_counter: fix fixed-purpose counter support on v2 Intel-PERFMON
X-Git-Tag: v2.6.31-rc1~383^2~302
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=066d7dea32c9bffe6decc0abe465627656cdd84e;p=pandora-kernel.git

perf_counter: fix fixed-purpose counter support on v2 Intel-PERFMON

Fixed-purpose counters stopped working in a simple 'perf stat ls' run:

   <not counted>  cache references
   <not counted>  cache misses

Due to:

  ef7b3e0: perf_counter, x86: remove vendor check in fixed_mode_idx()

Which made x86_pmu.num_counters_fixed matter: if it's nonzero, the
fixed-purpose counters are utilized.

But on v2 perfmon this field is not set (despite there being
fixed-purpose PMCs). So add a quirk to set the number of fixed-purpose
counters to at least three.

[ Impact: add quirk for three fixed-purpose counters on certain Intel CPUs ]

Cc: Robert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-28-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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