linux-kernel - [PATCH 2/2] powerpc, perf: BHRB filter configuration should follow the task

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Date:	Wed, 22 May 2013 11:17:47 +0530
From:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Cc:	michael@...erman.id.au, mikey@...ling.org
Subject: [PATCH 2/2] powerpc, perf: BHRB filter configuration should follow the task

When the task moves around the system, the corresponding cpuhw
per cpu strcuture should be popullated with the BHRB filter
request value so that PMU could be configured appropriately with
that during the next call into power_pmu_enable().

Signed-off-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/core-book3s.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 426180b..48c68a8 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1122,8 +1122,11 @@ nocheck:
 
 	ret = 0;
  out:
-	if (has_branch_stack(event))
+	if (has_branch_stack(event)) {
 		power_pmu_bhrb_enable(event);
+		cpuhw->bhrb_filter = ppmu->bhrb_filter_map(
+					event->attr.branch_sample_type);
+	}
 
 	perf_pmu_enable(event->pmu);
 	local_irq_restore(flags);
-- 
1.7.11.7

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