linux-kernel - Re: [PATCH v2 3/4] docs: riscv: Document hwprobe for Zicbop

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Message-ID: <20251009-27aafc23cb2a92c1c9b324b2@orel>
Date: Thu, 9 Oct 2025 11:46:21 -0500
From: Andrew Jones <ajones@...tanamicro.com>
To: Yao Zihong <zihong.plct@...c.iscas.ac.cn>
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	alexghiti@...osinc.com, shuah@...nel.org, samuel.holland@...ive.com, evan@...osinc.com, 
	cleger@...osinc.com, zihongyao@...look.com, zhangyin2018@...as.ac.cn, 
	Jonathan Corbet <corbet@....net>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Charlie Jenkins <charlie@...osinc.com>, 
	Cyan Yang <cyan.yang@...ive.com>, Jesse Taube <jesse@...osinc.com>, 
	Yunhui Cui <cuiyunhui@...edance.com>, Nam Cao <namcao@...utronix.de>, 
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v2 3/4] docs: riscv: Document hwprobe for Zicbop

On Thu, Oct 09, 2025 at 09:41:53PM +0800, Yao Zihong wrote:
> Update hwprobe.rst to include documentation of the new
> :c:macro:`RISCV_HWPROBE_EXT_ZICBOP` and
> :c:macro:`RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE`, following the same
> style as the Zicbom and Zicboz entries.
> 
> The extension bit records support for the Zicbop extension, and
> the block size key reports the block size in bytes.
> 
> Signed-off-by: Yao Zihong <zihong.plct@...c.iscas.ac.cn>
> ---
>  Documentation/arch/riscv/hwprobe.rst | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
> index 2f449c9b15bd..3b9c9d7e1409 100644
> --- a/Documentation/arch/riscv/hwprobe.rst
> +++ b/Documentation/arch/riscv/hwprobe.rst
> @@ -275,6 +275,9 @@ The following keys are defined:
>         ratified in commit 49f49c842ff9 ("Update to Rafified state") of
>         riscv-zabha.
>  
> +  * :c:macro:`RISCV_HWPROBE_EXT_ZICBOP`: The Zicbop extension is supported, as
> +       ratified in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs.
> +
>  * :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: Deprecated.  Returns similar values to
>       :c:macro:`RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF`, but the key was
>       mistakenly classified as a bitmask rather than a value.
> @@ -369,4 +372,7 @@ The following keys are defined:
>  
>      * :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XSFVFWMACCQQQ`: The Xsfvfwmaccqqq
>          vendor extension is supported in version 1.0 of Matrix Multiply Accumulate
> -	Instruction Extensions Specification.
> \ No newline at end of file
> +	Instruction Extensions Specification.
> +
> +* :c:macro:`RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE`: An unsigned int which
> +  represents the size of the Zicbop block in bytes.
> \ No newline at end of file

Please ensure this file has a newline so the last line doesn't have
to change every time we add new keys.

Thanks,
drew