linux-kernel - [ 21/82] ARM: 7663/1: perf: fix ARMv7 EVTYPE

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Message-Id: <20130318042146.360540879@decadent.org.uk>
Date:	Mon, 18 Mar 2013 04:22:05 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, Will Deacon <will.deacon@....com>,
	Christoffer Dall <cdall@...columbia.edu>,
	Russell King <rmk+kernel@....linux.org.uk>
Subject: [ 21/82] ARM: 7663/1: perf: fix ARMv7 EVTYPE_MASK to include NSH bit

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Will Deacon <will.deacon@....com>

commit f2fe09b055e2549de41fb107b34c60bac4a1b0cf upstream.

Masked out PMXEVTYPER.NSH means that we can't enable profiling at PL2,
regardless of the settings in the HDCR.

This patch fixes the broken mask.

Reported-by: Christoffer Dall <cdall@...columbia.edu>
Signed-off-by: Will Deacon <will.deacon@....com>
Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/arm/kernel/perf_event_v7.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -720,7 +720,7 @@ static const unsigned armv7_a15_perf_cac
 /*
  * PMXEVTYPER: Event selection reg
  */
-#define	ARMV7_EVTYPE_MASK	0xc00000ff	/* Mask for writable bits */
+#define	ARMV7_EVTYPE_MASK	0xc80000ff	/* Mask for writable bits */
 #define	ARMV7_EVTYPE_EVENT	0xff		/* Mask for EVENT bits */
 
 /*


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