Hello:
This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Mon, 26 Aug 2024 15:16:22 +0800 you wrote:
> From: Xu Kuohai <xukuohai@xxxxxxxxxx>
>
> The arm64 jit blindly saves/restores all callee-saved registers, making
> the jited result looks a bit too compliated. For example, for an empty
> prog, the jited result is:
>
> 0: bti jc
> 4: mov x9, lr
> 8: nop
> c: paciasp
> 10: stp fp, lr, [sp, #-16]!
> 14: mov fp, sp
> 18: stp x19, x20, [sp, #-16]!
> 1c: stp x21, x22, [sp, #-16]!
> 20: stp x26, x25, [sp, #-16]!
> 24: mov x26, #0
> 28: stp x26, x25, [sp, #-16]!
> 2c: mov x26, sp
> 30: stp x27, x28, [sp, #-16]!
> 34: mov x25, sp
> 38: bti j // tailcall target
> 3c: sub sp, sp, #0
> 40: mov x7, #0
> 44: add sp, sp, #0
> 48: ldp x27, x28, [sp], #16
> 4c: ldp x26, x25, [sp], #16
> 50: ldp x26, x25, [sp], #16
> 54: ldp x21, x22, [sp], #16
> 58: ldp x19, x20, [sp], #16
> 5c: ldp fp, lr, [sp], #16
> 60: mov x0, x7
> 64: autiasp
> 68: ret
>
> [...]
Here is the summary with links:
- [bpf-next,1/2] bpf, arm64: Get rid of fpb
https://git.kernel.org/bpf/bpf-next/c/bd737fcb6485
- [bpf-next,2/2] bpf, arm64: Avoid blindly saving/restoring all callee-saved registers
https://git.kernel.org/bpf/bpf-next/c/5d4fa9ec5643
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
