linux-kernel - Re: [PATCH bpf-next v4 2/2] riscv, bpf: Introduce shift add helper with Zba optimization

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Date: Wed, 29 May 2024 11:41:28 +0200
From: Björn Töpel <bjorn@...nel.org>
To: Xiao Wang <xiao.w.wang@...el.com>, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, luke.r.nels@...il.com,
 xi.wang@...il.com, daniel@...earbox.net
Cc: ast@...nel.org, andrii@...nel.org, martin.lau@...ux.dev,
 eddyz87@...il.com, song@...nel.org, yonghong.song@...ux.dev,
 john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
 haoluo@...gle.com, jolsa@...nel.org, linux-riscv@...ts.infradead.org,
 linux-kernel@...r.kernel.org, bpf@...r.kernel.org, pulehui@...wei.com,
 puranjay@...nel.org, haicheng.li@...el.com, Xiao Wang
 <xiao.w.wang@...el.com>
Subject: Re: [PATCH bpf-next v4 2/2] riscv, bpf: Introduce shift add helper
 with Zba optimization

Xiao,

Xiao Wang <xiao.w.wang@...el.com> writes:

> Zba extension is very useful for generating addresses that index into array
> of basic data types. This patch introduces sh2add and sh3add helpers for
> RV32 and RV64 respectively, to accelerate addressing for array of unsigned
> long data.

This patched slipped! Apologies for the slow reply.

Acked-by: Björn Töpel <bjorn@...nel.org>