[PATCH bpf-next 00/10] Add support arena atomics for RV64

[Pu Lehui]

On 2025/8/5 14:38, Björn Töpel wrote:
> Pu Lehui <pulehui at huaweicloud.com> writes:
> 
>> From: Pu Lehui <pulehui at huawei.com>
>>
>> patch 1-3 refactor redundant load and store operations.
>> patch 4-7 add Zacas instructions for cmpxchg.
>> patch 8 optimizes exception table handling.
>> patch 9-10 add support arena atomics for RV64.
>>
>> Tests `test_progs -t atomic,arena` have passed as shown bellow,
>> as well as `test_verifier` and `test_bpf.ko` have passed.
> 
> [...]
> 
>> Pu Lehui (10):
>>    riscv, bpf: Extract emit_stx() helper
>>    riscv, bpf: Extract emit_st() helper
>>    riscv, bpf: Extract emit_ldx() helper
>>    riscv: Separate toolchain support dependency from RISCV_ISA_ZACAS
>>    riscv, bpf: Add rv_ext_enabled macro for runtime detection extentsion
>>    riscv, bpf: Add Zacas instructions
>>    riscv, bpf: Optimize cmpxchg insn with Zacas support
>>    riscv, bpf: Add ex_insn_off and ex_jmp_off for exception table
>>      handling
>>    riscv, bpf: Add support arena atomics for RV64
>>    selftests/bpf: Enable arena atomics tests for RV64
>>
>>   arch/riscv/Kconfig                            |   1 -
>>   arch/riscv/include/asm/cmpxchg.h              |   6 +-
>>   arch/riscv/kernel/setup.c                     |   1 +
>>   arch/riscv/net/bpf_jit.h                      |  70 ++-
>>   arch/riscv/net/bpf_jit_comp64.c               | 516 +++++-------------
>>   .../selftests/bpf/progs/arena_atomics.c       |   9 +-
>>   6 files changed, 214 insertions(+), 389 deletions(-)
> 
> What a nice series! The best kind of changeset -- new feature, less
> code! Thank you, Lehui! Again, apologies for the horrible SLA. The
> weather in Sweden was simply Too Good this summer!

Sounds like a great vacation!

> 
> Tested-by: Björn Töpel <bjorn at rivosinc.com> # QEMU only
> Acked-by: Björn Töpel <bjorn at kernel.org>