bpf: inline bpf_map_lookup_elem() helper for PERCPU_HASH map

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Using new per-CPU BPF instruction, partially inline
bpf_map_lookup_elem() helper for per-CPU hashmap BPF map. Just like for
normal HASH map, we still generate a call into __htab_map_lookup_elem(),
but after that we resolve per-CPU element address using a new
instruction, saving on extra functions calls.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20240402021307.1012571-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Andrii Nakryiko 2024-04-01 19:13:05 -07:00 • committed by Alexei Starovoitov

parent db69718b8e

commit 0b56e637f7

1 changed files with 21 additions and 0 deletions

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kernel/bpf/hashtab.c

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