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-rw-r--r--arch/powerpc/perf/isa207-common.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c
index 964437adec18..2848904df638 100644
--- a/arch/powerpc/perf/isa207-common.c
+++ b/arch/powerpc/perf/isa207-common.c
@@ -288,6 +288,15 @@ int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)
mask |= CNST_PMC_MASK(pmc);
value |= CNST_PMC_VAL(pmc);
+
+ /*
+ * PMC5 and PMC6 are used to count cycles and instructions and
+ * they do not support most of the constraint bits. Add a check
+ * to exclude PMC5/6 from most of the constraints except for
+ * EBB/BHRB.
+ */
+ if (pmc >= 5)
+ goto ebb_bhrb;
}
if (pmc <= 4) {
@@ -357,6 +366,7 @@ int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)
}
}
+ebb_bhrb:
if (!pmc && ebb)
/* EBB events must specify the PMC */
return -1;