linux-kernel - Re: [RFC PATCH 0/4] riscv: Add Zalasr ISA exntesion support

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Message-ID: <20250826-dullness-seventy-c93e7c8479d0@spud>
Date: Tue, 26 Aug 2025 18:46:13 +0100
From: Conor Dooley <conor@...nel.org>
To: Xu Lu <luxu.kernel@...edance.com>
Cc: paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu,
	alex@...ti.fr, ajones@...tanamicro.com, brs@...osinc.com,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 0/4] riscv: Add Zalasr ISA exntesion support

On Tue, Aug 26, 2025 at 10:57:36PM +0800, Xu Lu wrote:
> This patch adds support for the Zalasr ISA extension, which supplies the
> real load acquire/store release instructions.
> 
> The specification can be found here:
> https://github.com/riscv/riscv-zalasr/blob/main/chapter2.adoc

Why is this an RFC?
Is the RFC tag related to how you have not CCed all relevant mailing
lists and maintainers?

Cheers,
Conor.

> 
> Xu Lu (4):
>   riscv: add ISA extension parsing for Zalasr
>   dt-bindings: riscv: Add Zalasr ISA extension description
>   riscv: Instroduce Zalasr instructions
>   riscv: Use Zalasr for smp_load_acquire/smp_store_release
> 
>  .../devicetree/bindings/riscv/extensions.yaml |  5 ++
>  arch/riscv/include/asm/barrier.h              | 79 ++++++++++++++++---
>  arch/riscv/include/asm/hwcap.h                |  1 +
>  arch/riscv/include/asm/insn-def.h             | 79 +++++++++++++++++++
>  arch/riscv/kernel/cpufeature.c                |  1 +
>  5 files changed, 154 insertions(+), 11 deletions(-)
> 
> -- 
> 2.20.1
> 

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