linux-kernel - Re: [PATCH] RISC-V: cpu.c: remove nonexistent ext from cpuinfo

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Date:   Wed, 18 May 2022 16:40:18 +0800
From:   "Hongren (Zenithal) Zheng" <i@...ithal.me>
To:     Atish Patra <atishp@...osinc.com>,
        Palmer Dabbelt <palmer@...osinc.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RISC-V: cpu.c: remove nonexistent ext from cpuinfo

On Tue, Apr 26, 2022 at 06:08:01AM +0800, Hongren (Zenithal) Zheng wrote:
> There are no single-letter B/K/J extentions,
> as they are never ratified. For P, it is still in
> progress and not ratified.
> 
> The ordering constraint of these placerholders is now removed
> from the spec. By commit ("Delete more nonexistent
> extensions from the naming constraints") of riscv/riscv-isa-manual

Hi, is there any further update on this patch?

> 
> Signed-off-by: Hongren (Zenithal) Zheng <i@...ithal.me>
> ---
>  arch/riscv/kernel/cpu.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
> index ccb617791e56..53a061ab0743 100644
> --- a/arch/riscv/kernel/cpu.c
> +++ b/arch/riscv/kernel/cpu.c
> @@ -113,10 +113,8 @@ static void print_isa_ext(struct seq_file *f)
>  /*
>   * These are the only valid base (single letter) ISA extensions as per the spec.
>   * It also specifies the canonical order in which it appears in the spec.
> - * Some of the extension may just be a place holder for now (B, K, P, J).
> - * This should be updated once corresponding extensions are ratified.
>   */
> -static const char base_riscv_exts[13] = "imafdqcbkjpvh";
> +static const char base_riscv_exts[9] = "imafdqcvh";

The base_riscv_exts "imafdqcvh" is exactly the spec now, as
https://github.com/riscv/riscv-isa-manual/commit/db7a4a0dad0e99d1ec1fc67b582624fc0aeae98e
(Add single-letter "H" extension to the table)
has shown

>  
>  static void print_isa(struct seq_file *f, const char *isa)
>  {
> -- 
> 2.35.1
>