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| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-03-14 02:27:17 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-15 21:57:25 -0400 |
| commit | c04167ce2ca0ecaeaafef006cb0d65cf01b68e42 (patch) | |
| tree | ef0c4dc4642696d84bd56c4f409dd32507981bb0 /kernel/kprobes.c | |
| parent | 03e69b508b6f7c51743055c9f61d1dfeadf4b635 (diff) | |
| download | blackbird-op-linux-c04167ce2ca0ecaeaafef006cb0d65cf01b68e42.tar.gz blackbird-op-linux-c04167ce2ca0ecaeaafef006cb0d65cf01b68e42.zip | |
ebpf: add helper for obtaining current processor id
This patch adds the possibility to obtain raw_smp_processor_id() in
eBPF. Currently, this is only possible in classic BPF where commit
da2033c28226 ("filter: add SKF_AD_RXHASH and SKF_AD_CPU") has added
facilities for this.
Perhaps most importantly, this would also allow us to track per CPU
statistics with eBPF maps, or to implement a poor-man's per CPU data
structure through eBPF maps.
Example function proto-type looks like:
u32 (*smp_processor_id)(void) = (void *)BPF_FUNC_get_smp_processor_id;
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/kprobes.c')
0 files changed, 0 insertions, 0 deletions
