linux-kernel - [PATCH 1/1] Change IBS PMU to use perf_hw

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Date:	Fri, 14 Dec 2012 14:57:42 -0600
From:	<suravee.suthikulpanit@....com>
To:	<a.p.zijlstra@...llo.nl>, <paulus@...ba.org>, <mingo@...hat.com>,
	<acme@...stprotocols.net>, <tglx@...utronix.de>, <hpa@...or.com>,
	<rric@...nel.org>, <x86@...nel.org>, <linux-kernel@...r.kernel.org>
CC:	<suravee.suthikulpanit@....com>, <jacob.shin@....com>
Subject: [PATCH 1/1] Change IBS PMU to use perf_hw_context

From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>

Currently, the AMD IBS PMU initialize pmu.task_ctx_nr to perf_invalid_context
which only allows IBS to be running only in system-wide mode (e.g. perf record -a).
IBS hardware is available in each core and should be per-context.  
This patch modifies the task_ctx_nr to use the perf_hw_context (default) instead.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>

diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
index 6336bcb..08fa71a 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
@@ -466,8 +466,6 @@ static struct attribute *ibs_op_format_attrs[] = {
 
 static struct perf_ibs perf_ibs_fetch = {
 	.pmu = {
-		.task_ctx_nr	= perf_invalid_context,
-
 		.event_init	= perf_ibs_init,
 		.add		= perf_ibs_add,
 		.del		= perf_ibs_del,
@@ -490,8 +488,6 @@ static struct perf_ibs perf_ibs_fetch = {
 
 static struct perf_ibs perf_ibs_op = {
 	.pmu = {
-		.task_ctx_nr	= perf_invalid_context,
-
 		.event_init	= perf_ibs_init,
 		.add		= perf_ibs_add,
 		.del		= perf_ibs_del,
-- 
1.7.10.4


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