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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>
This commit is contained in:
Anshuman Khandual 2013-06-10 11:23:29 +05:30 committed by Benjamin Herrenschmidt
parent 7689bdcab1
commit ff3d79dc12
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/perf/core-book3s.c
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@ -1252,8 +1252,11 @@ static int power_pmu_add(struct perf_event *event, int ef_flags)
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);