Re: [PATCH v3 0/4] Fix and optimize BPF tailcall for LoongArch

[Daniel Borkmann]

On 7/7/26 12:15 PM, Tiezhu Yang wrote:
> Based on 7.2-rc2, tested on a Loongson-3A6000 physical machine.
>
> Here are the test results:
>
>    $ sudo modprobe test_bpf test_suite=test_tail_calls
>    $ dmesg -t | tail -1
>    test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [10/10 JIT'ed]
>
>    $ sudo ./test_progs -t tailcalls | tail -1
>    Summary: 1/37 PASSED, 0 SKIPPED, 0 FAILED
>
> v2 -> v3:
>    -- Patch 1: Add Fixes tag.
>    -- Patch 2: Update the commit message and add Fixes tag.
>    -- Patch 3: Update the commit message and add Fixes tag.
>    -- Patch 4: Condense the code comments and update the commit message.
>
> No code changes.

Tiezhu/Huacai, do you want us to route these via bpf-next tree?

> Tiezhu Yang (4):
>    LoongArch: BPF: Optimize redundant TCC loads in epilogue
>    LoongArch: BPF: Move arena register slot below TCC context
>    LoongArch: BPF: Refactor jump offset calculation in tail call
>    LoongArch: BPF: Implement branchless conditional move for TCC
>
>   arch/loongarch/include/asm/inst.h |  6 +++
>   arch/loongarch/net/bpf_jit.c      | 85 +++++++++++--------------------
>   2 files changed, 36 insertions(+), 55 deletions(-)