diff options
| author | Will Deacon <will.deacon@arm.com> | 2010-02-26 10:46:15 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-03-13 10:50:29 +0000 |
| commit | d10fca9f39238b07cc670b441d2b423de30359d2 (patch) | |
| tree | d5b988628ad269d4d3f39b76ec55d9855a223988 | |
| parent | ddee87f208b6229d2910dd5930c87089dc56c87e (diff) | |
| download | linux-d10fca9f39238b07cc670b441d2b423de30359d2.tar.bz2 | |
ARM: 5960/1: ARM: perf-events: fix v7 event selection mask
The event selection mask for ARMv7 cores [ARMV7_EVTSEL_MASK]
is incorrectly set to 0x7f. This means that the top bit of an
event ID is ignored, so counting branch misses (id=0x10) and
ISBs (id=0x90) give the same results.
This patch sets the event selection mask to the correct value
of 0xff.
Signed-off-by: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index b44d15948b56..c45a155a73dc 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -1625,7 +1625,7 @@ enum armv7_counters { /* * EVTSEL: Event selection reg */ -#define ARMV7_EVTSEL_MASK 0x7f /* Mask for writable bits */ +#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */ /* * SELECT: Counter selection reg |