powerpc/perf: BHRB filter configuration should follow the task

When the task moves around the system, the corresponding cpuhw
per cpu strcuture should be popullated with the BHRB filter
request value so that PMU could be configured appropriately with
that during the next call into power_pmu_enable().

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index a3985aee77fe..24a45f91c65f 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1252,8 +1252,11 @@ nocheck:
 
         ret = 0;
  out:
-        if (has_branch_stack(event))
+        if (has_branch_stack(event)) {
                 power_pmu_bhrb_enable(event);
+                cpuhw->bhrb_filter = ppmu->bhrb_filter_map(
+                                        event->attr.branch_sample_type);
+        }
 
         perf_pmu_enable(event->pmu);
         local_irq_restore(flags);