powerpc/perf: Factor out event_alternative function

Factor out the power8 event_alternative function to share
the code with power9.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 2 insertions, 33 deletions

diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
index d07186382f3a..ce15b19a7962 100644
--- a/arch/powerpc/perf/power8-pmu.c
+++ b/arch/powerpc/perf/power8-pmu.c
@@ -48,43 +48,12 @@ static const unsigned int event_alternatives[][MAX_ALT] = {
 	{ PM_RUN_INST_CMPL_ALT,		PM_RUN_INST_CMPL },
 };
 
-/*
- * Scan the alternatives table for a match and return the
- * index into the alternatives table if found, else -1.
- */
-static int find_alternative(u64 event)
-{
-	int i, j;
-
-	for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
-		if (event < event_alternatives[i][0])
-			break;
-
-		for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
-			if (event == event_alternatives[i][j])
-				return i;
-	}
-
-	return -1;
-}
-
 static int power8_get_alternatives(u64 event, unsigned int flags, u64 alt[])
 {
 	int i, j, num_alt = 0;
-	u64 alt_event;
-
-	alt[num_alt++] = event;
-
-	i = find_alternative(event);
-	if (i >= 0) {
-		/* Filter out the original event, it's already in alt[0] */
-		for (j = 0; j < MAX_ALT; ++j) {
-			alt_event = event_alternatives[i][j];
-			if (alt_event && alt_event != event)
-				alt[num_alt++] = alt_event;
-		}
-	}
 
+	num_alt = isa207_get_alternatives(event, alt, event_alternatives,
+					(int)ARRAY_SIZE(event_alternatives));
 	if (flags & PPMU_ONLY_COUNT_RUN) {
 		/*
 		 * We're only counting in RUN state, so PM_CYC is equivalent to