linux-kernel - Re: [PATCH 3/3] riscv: dts: thead: add zfh for th1520

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJF2gTQN71ekFURQLNEMjhcKQbYhpHU1vcNwm+Rx7eONPjz9Jg@mail.gmail.com>
Date: Sat, 13 Sep 2025 13:04:17 +0800
From: Guo Ren <guoren@...nel.org>
To: Han Gao <rabenda.cn@...il.com>
Cc: devicetree@...r.kernel.org, Drew Fustini <fustini@...nel.org>, 
	Fu Wei <wefu@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, linux-riscv@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Han Gao <gaohan@...as.ac.cn>
Subject: Re: [PATCH 3/3] riscv: dts: thead: add zfh for th1520

On Fri, Sep 12, 2025 at 2:46 AM Han Gao <rabenda.cn@...il.com> wrote:
>
> th1520 support Zfh ISA extension [1].
>
> Link: https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource//1737721869472/%E7%8E%84%E9%93%81C910%E4%B8%8EC920R1S6%E7%94%A8%E6%88%B7%E6%89%8B%E5%86%8C%28xrvm%29_20250124.pdf [1]
Agree with Conor's advice.

Linus just had some comment about the Link tag usage:
https://www.phoronix.com/news/Linus-Torvalds-No-Link-Tags

We should be careful :-P

>
> Signed-off-by: Han Gao <rabenda.cn@...il.com>
> Signed-off-by: Han Gao <gaohan@...as.ac.cn>
> ---
>  arch/riscv/boot/dts/thead/th1520.dtsi | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> index 7f07688aa964..2075bb969c2f 100644
> --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> @@ -26,7 +26,7 @@ c910_0: cpu@0 {
>                         riscv,isa-base = "rv64i";
>                         riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
>                                                "ziccrse", "zicntr", "zicsr",
> -                                              "zifencei", "zihpm",
> +                                              "zifencei", "zihpm", "zfh",
>                                                "xtheadvector";
>                         thead,vlenb = <16>;
>                         reg = <0>;
> @@ -53,7 +53,7 @@ c910_1: cpu@1 {
>                         riscv,isa-base = "rv64i";
>                         riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
>                                                "ziccrse", "zicntr", "zicsr",
> -                                              "zifencei", "zihpm",
> +                                              "zifencei", "zihpm", "zfh",
>                                                "xtheadvector";
>                         thead,vlenb = <16>;
>                         reg = <1>;
> @@ -80,7 +80,7 @@ c910_2: cpu@2 {
>                         riscv,isa-base = "rv64i";
>                         riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
>                                                "ziccrse", "zicntr", "zicsr",
> -                                              "zifencei", "zihpm",
> +                                              "zifencei", "zihpm", "zfh",
>                                                "xtheadvector";
>                         thead,vlenb = <16>;
>                         reg = <2>;
> @@ -107,7 +107,7 @@ c910_3: cpu@3 {
>                         riscv,isa-base = "rv64i";
>                         riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
>                                                "ziccrse", "zicntr", "zicsr",
> -                                              "zifencei", "zihpm",
> +                                              "zifencei", "zihpm", "zfh",
>                                                "xtheadvector";
>                         thead,vlenb = <16>;
>                         reg = <3>;
> --
> 2.47.3
>


-- 
Best Regards
 Guo Ren