metag: perf: prepare for use by oprofile
To allow our perf_events code to work with oprofile the PERF_TYPE_RAW
event type attribute is implemented, which allows the internal encoding
of events to be used externally (this requires some tweaks so that it
handles invalid event types more gracefully), and perf_pmu_name() is
adjusted to return metag_pmu->name instead of metag_pmu->pmu.name (which
is changed to "meta2").
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Robert Richter <rric@kernel.org>
Cc: oprofile-list@lists.sf.net
diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index a1eff36..3665694 100644
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -40,10 +40,10 @@
/* PMU admin */
const char *perf_pmu_name(void)
{
- if (metag_pmu)
- return metag_pmu->pmu.name;
+ if (!metag_pmu)
+ return NULL;
- return NULL;
+ return metag_pmu->name;
}
EXPORT_SYMBOL_GPL(perf_pmu_name);
@@ -171,6 +171,7 @@
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
case PERF_TYPE_HW_CACHE:
+ case PERF_TYPE_RAW:
err = _hw_perf_event_init(event);
break;
@@ -556,6 +557,10 @@
if (err)
return err;
break;
+
+ case PERF_TYPE_RAW:
+ mapping = attr->config;
+ break;
}
/* Return early if the event is unsupported */
@@ -623,7 +628,7 @@
/* Check for a core internal or performance channel event. */
if (tmp) {
- void *perf_addr = (void *)PERF_COUNT(idx);
+ void *perf_addr;
/*
* Anything other than a cycle count will write the low-
@@ -637,9 +642,14 @@
case 0xf0:
perf_addr = (void *)PERF_CHAN(idx);
break;
+
+ default:
+ perf_addr = NULL;
+ break;
}
- metag_out32((config & 0x0f), perf_addr);
+ if (perf_addr)
+ metag_out32((config & 0x0f), perf_addr);
/*
* Now we use the high nibble as the performance event to
@@ -848,7 +858,7 @@
metag_pmu->max_period = 0;
}
- metag_pmu->name = "Meta 2";
+ metag_pmu->name = "meta2";
metag_pmu->version = version;
metag_pmu->pmu = pmu;
}
