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authorKaixu Xia <xiakaixu@huawei.com>2015-08-06 07:02:32 +0000
committerDavid S. Miller <davem@davemloft.net>2015-08-09 22:50:05 -0700
commitffe8690c85b8426db7783064724d106702f1b1e8 (patch)
treebaf9499372ba05151d168ecf4aff23591ab981ba /kernel/bpf/core.c
parentf1d5ca434413b20cd3f8c18ff2b634b7782149a5 (diff)
downloadlinux-sh-ffe8690c85b8426db7783064724d106702f1b1e8.tar.gz
perf: add the necessary core perf APIs when accessing events counters in eBPF programs
This patch add three core perf APIs: - perf_event_attrs(): export the struct perf_event_attr from struct perf_event; - perf_event_get(): get the struct perf_event from the given fd; - perf_event_read_local(): read the events counters active on the current CPU; These APIs are needed when accessing events counters in eBPF programs. The API perf_event_read_local() comes from Peter and I add the corresponding SOB. Signed-off-by: Kaixu Xia <xiakaixu@huawei.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
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