diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c
index 177de814286fca3006aad90bee1199f899c3387d..6a2f65d3d088cf964a4c61d3e6e64891354eed05 100644
--- a/arch/powerpc/perf/isa207-common.c
+++ b/arch/powerpc/perf/isa207-common.c
@@ -226,8 +226,13 @@ void isa207_get_mem_weight(u64 *weight)
 	u64 mmcra = mfspr(SPRN_MMCRA);
 	u64 exp = MMCRA_THR_CTR_EXP(mmcra);
 	u64 mantissa = MMCRA_THR_CTR_MANT(mmcra);
+	u64 sier = mfspr(SPRN_SIER);
+	u64 val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT;
 
-	*weight = mantissa << (2 * exp);
+	if (val == 0 || val == 7)
+		*weight = 0;
+	else
+		*weight = mantissa << (2 * exp);
 }
 
 int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)