selftests/bpf: Add tests for KF_IMPLICIT_ARGS

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Add trivial end-to-end tests to validate that KF_IMPLICIT_ARGS flag is
properly handled by both resolve_btfids and the verifier.

Declare kfuncs in bpf_testmod. Check that bpf_prog_aux pointer is set
in the kfunc implementation. Verify that calls with implicit args and
a legacy case all work.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260120222638.3976562-7-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Ihor Solodrai 2026-01-20 14:26:31 -08:00 • committed by Alexei Starovoitov

parent 9d19996599

commit e939f3d16d

3 changed files with 77 additions and 0 deletions

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10

tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c

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41

tools/testing/selftests/bpf/progs/kfunc_implicit_args.c

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26

tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

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