perf/POWER7: Create a sysfs format entry for Power7 events

Create a sysfs entry, '/sys/bus/event_source/devices/cpu/format/event'
which describes the format of the POWER7 PMU events.

This code is based on corresponding code in x86.

Changelog[v4]:  [Michael Ellerman, Paul Mckerras] The event format is different
		for other POWER cpus. So move the code to POWER7-specific,
		power7-pmu.c Also, the POWER7 format uses bits 0-19 not 0-20.

Changelog[v2]: [Jiri Osla] Use PMU_FORMAT_ATTR rather than duplicating code.

Signed-off-by: Sukadev Bhattiprolu <[email protected]>
Acked-by: Paul Mackerras <[email protected]>
Tested-by: Michael Ellerman <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Anton Blanchard <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Robert Richter <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/powerpc/perf/power7-pmu.c b/arch/powerpc/perf/power7-pmu.c
index b554879bd31e..3c475d6267c7 100644
--- a/arch/powerpc/perf/power7-pmu.c
+++ b/arch/powerpc/perf/power7-pmu.c
@@ -420,7 +420,20 @@ static struct attribute_group power7_pmu_events_group = {
 	.attrs = power7_events_attr,
 };
 
+PMU_FORMAT_ATTR(event, "config:0-19");
+
+static struct attribute *power7_pmu_format_attr[] = {
+	&format_attr_event.attr,
+	NULL,
+};
+
+struct attribute_group power7_pmu_format_group = {
+	.name = "format",
+	.attrs = power7_pmu_format_attr,
+};
+
 static const struct attribute_group *power7_pmu_attr_groups[] = {
+	&power7_pmu_format_group,
 	&power7_pmu_events_group,
 	NULL,
 };