Re: [PATCH v3 0/3] LoongArch: BPF: Refine move_imm() and optimize 32-bit operations

[Tiezhu Yang]

On 2026/10/16 下午4:10, Tiezhu Yang wrote:
> v3:
>    -- Add a prerequisite patch to detect CPUCFG2_DIV32 feature.
>    -- Fix a hardware compatibility bug by checking cpu_has_div32
>       before emitting native 32-bit div/mod instructions.
>
> This version is based on v7.3-rc7 and has been tested on Loongson-3A6000
> and Loongson-3A5000 physical machines.
>
> All of the testcases of test_bpf passed on Loongson-3A6000 (with DIV32)
> and Loongson-3A5000 (without DIV32), here are the test results:
>
> $ sudo modprobe test_bpf
> $ dmesg -t | grep Summary
> test_bpf: Summary: 1061 PASSED, 0 FAILED, [1049/1049 JIT'ed]
> test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [10/10 JIT'ed]
> test_bpf: test_skb_segment: Summary: 2 PASSED, 0 FAILED
>
> For the BPF selftests test_verifier and test_progs, there are no any
> regressions.
>
> Tiezhu Yang (3):
>    LoongArch: Add CPUCFG2 DIV32 feature detection
>    LoongArch: BPF: Clean up and decouple is32 parameter from move_imm()
>    LoongArch: BPF: Optimize 32-bit operations using native instructions

Hi Huacai, Hengqi,

A gentle ping on the last 2 patches of this series since patch 1
has been applied.

There are no any reports from bot+bpf-ci and sashiko-bot,
and also "test_bpf" and "./test_progs -t jit_insns" tests passed.

Just to clarify the testing status: the 3 failures mentioned in
the previous test report are entirely pre-existing on the clean
bpf-next tree and completely unrelated to this 32-bit optimization
series.

The core ALU32/JMP32 paths introduced here have been fully verified
and passed without any regressions on both 3A6000 and 3A5000 physical
machines.

Do you have any further comments or objections to patches 2 and 3?
If these look good to you, it would be great to have them merged to
avoid rebasing and resending these patches after this merge window.

Thanks,
Tiezhu