powerpc/perf: Power8 PMU support
This patch adds support for the power8 PMU to perf. Work is ongoing to add generic cache events. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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