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-rw-r--r--arch/powerpc/perf/power8-pmu.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
index 1d7c4428a55e..67aab104b9fe 100644
--- a/arch/powerpc/perf/power8-pmu.c
+++ b/arch/powerpc/perf/power8-pmu.c
@@ -270,18 +270,20 @@ static int power8_get_constraint(u64 event, unsigned long *maskp, unsigned long
cache = (event >> EVENT_CACHE_SEL_SHIFT) & EVENT_CACHE_SEL_MASK;
ebb = (event >> EVENT_EBB_SHIFT) & EVENT_EBB_MASK;
- /* Clear the EBB bit in the event, so event checks work below */
- event &= ~(EVENT_EBB_MASK << EVENT_EBB_SHIFT);
-
if (pmc) {
+ u64 base_event;
+
if (pmc > 6)
return -1;
- mask |= CNST_PMC_MASK(pmc);
- value |= CNST_PMC_VAL(pmc);
+ /* Ignore Linux defined bits when checking event below */
+ base_event = event & ~(EVENT_EBB_MASK << EVENT_EBB_SHIFT);
- if (pmc >= 5 && event != 0x500fa && event != 0x600f4)
+ if (pmc >= 5 && base_event != 0x500fa && base_event != 0x600f4)
return -1;
+
+ mask |= CNST_PMC_MASK(pmc);
+ value |= CNST_PMC_VAL(pmc);
}
if (pmc <= 4) {