linux-kernel - [tip:perf/core] perf, x86: Small fix to cpuid10

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Message-ID: <tip-e768aee89c687a50e6a2110e30c5cae1fbf0d2da@git.kernel.org>
Date:	Tue, 8 Jun 2010 20:55:50 GMT
From:	tip-bot for Livio Soares <livio@...g.toronto.edu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, hpa@...or.com,
	mingo@...hat.com, arjan@...ux.intel.com, a.p.zijlstra@...llo.nl,
	livio@...g.toronto.edu, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] perf, x86: Small fix to cpuid10_edx

Commit-ID:  e768aee89c687a50e6a2110e30c5cae1fbf0d2da
Gitweb:     http://git.kernel.org/tip/e768aee89c687a50e6a2110e30c5cae1fbf0d2da
Author:     Livio Soares <livio@...g.toronto.edu>
AuthorDate: Thu, 3 Jun 2010 15:00:31 -0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 8 Jun 2010 20:27:04 +0200

perf, x86: Small fix to cpuid10_edx

Fixes to 'cpuid10_edx' to comply with Intel documentation.
According to the Intel Manual, Volume 2A, Table 3-12, the cpuid for
architecture performance monitoring returns, in EDX, two pieces of
information:

  1) Number of fixed-function counters (5 bits, not 4)
  2) Width of fixed-function counters (8 bits)

Signed-off-by: Livio Soares <livio@...g.toronto.edu>
Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Arjan van de Ven <arjan@...ux.intel.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/include/asm/perf_event.h |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 254883d..6ed3ae4 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -68,8 +68,9 @@ union cpuid10_eax {
 
 union cpuid10_edx {
 	struct {
-		unsigned int num_counters_fixed:4;
-		unsigned int reserved:28;
+		unsigned int num_counters_fixed:5;
+		unsigned int bit_width_fixed:8;
+		unsigned int reserved:19;
 	} split;
 	unsigned int full;
 };
--
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