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Age	Commit message (Collapse)	Author
2026-09-13	selftests/bpf: Add test for indirect struct_ops trampoline	Tiezhu Yang
	Add a test case to verify that arguments passed on the stack are correctly read by an indirect struct_ops trampoline. This test ensures the correctness of stack offsets across various architectures. It is particularly critical for architectures like LoongArch, RISC-V, ARM64, and PowerPC where arguments beyond the first 8 registers are passed on the stack, as well as x86_64 and s390x which have lower register argument limits. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/20260908073506.29734-1-yangtiezhu@loongson.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24	selftests/bpf: Add test for struct_ops __ref argument in any position	Varun R Mallya
	Add a selftest to verify that the verifier correctly identifies refcounted arguments in struct_ops programs, even when they are not the first argument. This ensures that the restriction on tail calls for programs with __ref arguments is properly enforced regardless of which argument they appear in. This test verifies the fix for check_struct_ops_btf_id() proposed by Keisuke Nishimura [0], which corrected a bug where only the first argument was checked for the refcounted flag. The test includes: - An update to bpf_testmod to add 'test_refcounted_multi', an operator with three arguments where the third is tagged with "__ref". - A BPF program 'test_refcounted_multi' that attempts a tail call. - A test runner that asserts the verifier rejects the program with "program with __ref argument cannot tail call". [0]: https://lore.kernel.org/bpf/20260320130219.63711-1-keisuke.nishimura@inria.fr/ Signed-off-by: Varun R Mallya <varunrmallya@gmail.com> Link: https://lore.kernel.org/r/20260321214038.80479-1-varunrmallya@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>