Re: [PATCH bpf-next 0/8] bpf, riscv64: Support load-acquire and store-release instructions

[Peilin Ye <yepeilin@google.com>]

Hi Lehui,

On Wed, Apr 30, 2025 at 11:56:03AM +0800, Pu Lehui wrote:
> On 2025/4/30 8:48, Peilin Ye wrote:
> > Andrea Parri (2):
> >    bpf, riscv64: Introduce emit_load_*() and emit_store_*()
> >    bpf, riscv64: Support load-acquire and store-release instructions
> > 
> > Peilin Ye (6):
> >    bpf/verifier: Handle BPF_LOAD_ACQ instructions in insn_def_regno()
> >    bpf, riscv64: Skip redundant zext instruction after load-acquire
> >    selftests/bpf: Use CAN_USE_LOAD_ACQ_STORE_REL when appropriate
> >    selftests/bpf: Avoid passing out-of-range values to __retval()
> >    selftests/bpf: Verify zero-extension behavior in load-acquire tests
> >    selftests/bpf: Enable non-arena load-acquire/store-release selftests
> >      for riscv64
> > 
> >   arch/riscv/net/bpf_jit.h                      |  15 +
> >   arch/riscv/net/bpf_jit_comp64.c               | 334 ++++++++++++------
> >   arch/riscv/net/bpf_jit_core.c                 |   3 +-
> >   kernel/bpf/verifier.c                         |  11 +-
> >   tools/testing/selftests/bpf/progs/bpf_misc.h  |   5 +-
> >   .../bpf/progs/verifier_load_acquire.c         |  48 ++-
> >   .../selftests/bpf/progs/verifier_precision.c  |   5 +-
> >   .../bpf/progs/verifier_store_release.c        |  39 +-
> >   8 files changed, 314 insertions(+), 146 deletions(-)
> 
> Hi Peilin, good to see the implementation of load-acquire and store-release
> instructions on RV64! But I'm about to start my vacation, so I'll test it
> once I'm back.

Thanks for the reviews, and have a great vacation!

Peilin Ye


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