linux-kernel - [tip:perf/urgent] perf/x86/p4: Add format attributes

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Message-ID: <tip-7b8e6da46b921d30ac1553cac56d8fb74f0b431d@git.kernel.org>
Date:	Tue, 3 Apr 2012 01:11:11 -0700
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com,
	bonbons@...ux-vserver.org, hpa@...or.com, mingo@...nel.org,
	gorcunov@...nvz.org, a.p.zijlstra@...llo.nl, jolsa@...hat.com,
	rostedt@...dmis.org, ming.m.lin@...el.com, tglx@...utronix.de
Subject: [tip:perf/urgent] perf/x86/p4: Add format attributes

Commit-ID:  7b8e6da46b921d30ac1553cac56d8fb74f0b431d
Gitweb:     http://git.kernel.org/tip/7b8e6da46b921d30ac1553cac56d8fb74f0b431d
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Tue, 27 Mar 2012 16:50:42 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 3 Apr 2012 08:33:38 +0200

perf/x86/p4: Add format attributes

Steven reported his P4 not booting properly, the missing format
attributes cause a NULL ptr deref. Cure this by adding the
missing format specification.

I took the format description out of the comment near
p4_config_pack*() and hope that comment is still relatively
accurate.

Reported-by: Steven Rostedt <rostedt@...dmis.org>
Reported-by: Bruno Prémont <bonbons@...ux-vserver.org>
Tested-by: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Cyrill Gorcunov <gorcunov@...nvz.org>
Cc: Lin Ming <ming.m.lin@...el.com>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1332859842.16159.227.camel@twins
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/perf_event_p4.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index ef484d9..a2dfacf 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -1271,6 +1271,17 @@ done:
 	return num ? -EINVAL : 0;
 }
 
+PMU_FORMAT_ATTR(cccr, "config:0-31" );
+PMU_FORMAT_ATTR(escr, "config:32-62");
+PMU_FORMAT_ATTR(ht,   "config:63"   );
+
+static struct attribute *intel_p4_formats_attr[] = {
+	&format_attr_cccr.attr,
+	&format_attr_escr.attr,
+	&format_attr_ht.attr,
+	NULL,
+};
+
 static __initconst const struct x86_pmu p4_pmu = {
 	.name			= "Netburst P4/Xeon",
 	.handle_irq		= p4_pmu_handle_irq,
@@ -1305,6 +1316,8 @@ static __initconst const struct x86_pmu p4_pmu = {
 	 * the former idea is taken from OProfile code
 	 */
 	.perfctr_second_write	= 1,
+
+	.format_attrs		= intel_p4_formats_attr,
 };
 
 __init int p4_pmu_init(void)
--
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