On Thu, Aug 21, 2025 at 5:16 AM Hengqi Chen <hengqi.chen@xxxxxxxxx> wrote: > > The following two selftest cases triggers oops on LoongArch: > > $ ./test_progs -a ns_bpf_qdisc -a tracing_struct > I tested this patch series by running bpf selftests as below to bypass the tests that would hang up the loongarch kernel, I also denied the tracing_struct that I think is related to module_attach and subprogs_extable, these three tests I think is related to fentry/fexit on kernel module functions and that would hang up loongarch kernel. The rest of bpf selftests failed report for the loongarch kernel is here [0]. ./test_progs \ --deny=module_attach \ --deny=struct_ops \ --deny=subprogs_extable \ --deny=tracing_struct \ --deny=timer_lockup \ --json-summary="./ns_bpf_qdisc.json" ... #213/1 ns_bpf_qdisc/fifo:OK #213/2 ns_bpf_qdisc/fq:OK #213/3 ns_bpf_qdisc/attach to mq:OK #213/4 ns_bpf_qdisc/attach to non root:OK #213/5 ns_bpf_qdisc/incompl_ops:OK #213 ns_bpf_qdisc:OK ... [0]: https://www.bpfire.net/download/ns_bpf_qdisc.json.txt Tested-by: Vincent Li <vincent.mc.li@xxxxxxxxx> > This small series tries to fix/workaround these issues. > See individual commit for details. > > While at it, remove a duplicated flags check in __arch_prepare_bpf_trampoline(). > > Hengqi Chen (3): > LoongArch: BPF: Remove duplicated flags check > LoongArch: BPF: Sign extend struct ops return values properly > LoongArch: BPF: No support of struct argument in trampoline programs > > arch/loongarch/net/bpf_jit.c | 54 +++++++++++++++++++++++++++++------- > 1 file changed, 44 insertions(+), 10 deletions(-) > > -- > 2.43.5
