perf pmu: Add helper function is_pmu_core to detect PMU CORE devices

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On some platforms, PMU core devices sysfs name is not cpu.
Adding function is_pmu_core to detect PMU core devices using
core device specific hints in sysfs.

For arm64 platforms, all core devices have file "cpus" in sysfs.

Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Tested-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Tested-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/n/tip-y1woxt1k2pqqwpprhonnft2s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Ganapatrao Kulkarni 2017-08-24 16:30:58 +05:30 • committed by Arnaldo Carvalho de Melo

parent b57df28893

commit 14b22ae028

1 changed files with 35 additions and 4 deletions

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tools/perf/util/pmu.c

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