Re: [PATCH bpf-next v2 0/9] Introduce load-acquire and store-release BPF instructions

[Peilin Ye]

On Fri, Feb 07, 2025 at 02:04:54AM +0000, Peilin Ye wrote:
> Peilin Ye (9):
>   bpf/verifier: Factor out atomic_ptr_type_ok()
>   bpf/verifier: Factor out check_atomic_rmw()
>   bpf/verifier: Factor out check_load_mem() and check_store_reg()
>   bpf: Introduce load-acquire and store-release instructions
>   arm64: insn: Add BIT(23) to {load,store}_ex's mask
>   arm64: insn: Add load-acquire and store-release instructions
>   bpf, arm64: Support load-acquire and store-release instructions
>   selftests/bpf: Add selftests for load-acquire and store-release
>     instructions
>   bpf, docs: Update instruction-set.rst for load-acquire and
>     store-release instructions
> 
>  .../bpf/standardization/instruction-set.rst   | 114 ++++++--
>  arch/arm64/include/asm/insn.h                 |  12 +-
>  arch/arm64/lib/insn.c                         |  29 ++
>  arch/arm64/net/bpf_jit.h                      |  20 ++
>  arch/arm64/net/bpf_jit_comp.c                 |  87 +++++-
>  arch/s390/net/bpf_jit_comp.c                  |  14 +-
>  arch/x86/net/bpf_jit_comp.c                   |   4 +
>  include/linux/bpf.h                           |  11 +
>  include/linux/filter.h                        |   2 +
>  include/uapi/linux/bpf.h                      |  13 +
>  kernel/bpf/core.c                             |  63 ++++-
>  kernel/bpf/disasm.c                           |  12 +
>  kernel/bpf/verifier.c                         | 234 +++++++++++-----
>  tools/include/uapi/linux/bpf.h                |  13 +
>  .../selftests/bpf/prog_tests/arena_atomics.c  |  50 ++++
>  .../selftests/bpf/prog_tests/verifier.c       |   4 +
>  .../selftests/bpf/progs/arena_atomics.c       |  88 ++++++
>  .../bpf/progs/verifier_load_acquire.c         | 190 +++++++++++++
>  .../selftests/bpf/progs/verifier_precision.c  |  47 ++++
>  .../bpf/progs/verifier_store_release.c        | 262 ++++++++++++++++++
>  20 files changed, 1164 insertions(+), 105 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/progs/verifier_load_acquire.c
>  create mode 100644 tools/testing/selftests/bpf/progs/verifier_store_release.c

Looks like the llvm-18 CI job passed but the llvm-17/gcc ones failed.
I'll debug with llvm-17 and see if I need different #ifdef guards for
the new tests.

Thanks,
Peilin Ye