powerpc/perf: Clear MMCR2 when enabling PMU

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / perf / core-book3s.c

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index a2ff1bda706a9e25eb95e95e9dbc982df28f58fe..bae697cd592510cb320eb091fb5a930000944a02 100644 (file)
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1300,6 +1300,9 @@ static void power_pmu_enable(struct pmu *pmu)
 
        write_mmcr0(cpuhw, mmcr0);
 
+       if (ppmu->flags & PPMU_ARCH_207S)
+               mtspr(SPRN_MMCR2, 0);
+
        /*
         * Enable instruction sampling if necessary
         */