linux-kernel - Re: [PATCH v2 03/19] riscv: hwprobe: add support for scalar crypto ISA extensions

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Message-ID: <CALs-HssE=denuwBqH4KtCr1QqTzPb9rELW1ZXR5Cr-nqQQWQoA@mail.gmail.com>
Date:   Wed, 18 Oct 2023 10:24:49 -0700
From:   Evan Green <evan@...osinc.com>
To:     Clément Léger <cleger@...osinc.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Palmer Dabbelt <palmer@...osinc.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jonathan Corbet <corbet@....net>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor@...nel.org>,
        Samuel Ortiz <sameo@...osinc.com>
Subject: Re: [PATCH v2 03/19] riscv: hwprobe: add support for scalar crypto
 ISA extensions

On Tue, Oct 17, 2023 at 6:15 AM Clément Léger <cleger@...osinc.com> wrote:
>
> Export the following scalar crypto extensions through hwprobe:
>
> - Zbkb
> - Zbkc
> - Zbkx
> - Zknd
> - Zkne
> - Zknh
> - Zksed
> - Zksh
> - Zkt
>
> Signed-off-by: Clément Léger <cleger@...osinc.com>
> ---
>  Documentation/riscv/hwprobe.rst       | 30 +++++++++++++++++++++++++++
>  arch/riscv/include/uapi/asm/hwprobe.h | 10 +++++++++
>  arch/riscv/kernel/sys_riscv.c         | 10 +++++++++
>  3 files changed, 50 insertions(+)
>
> diff --git a/Documentation/riscv/hwprobe.rst b/Documentation/riscv/hwprobe.rst
> index a52996b22f75..968895562d42 100644
> --- a/Documentation/riscv/hwprobe.rst
> +++ b/Documentation/riscv/hwprobe.rst
> @@ -77,6 +77,36 @@ The following keys are defined:
>    * :c:macro:`RISCV_HWPROBE_EXT_ZBS`: The Zbs extension is supported, as defined
>         in version 1.0 of the Bit-Manipulation ISA extensions.
>
> +  * :c:macro:`RISCV_HWPROBE_EXT_ZBC` The Zbc extension is supported, as defined
> +       in version 1.0 of the Scalar Crypto ISA extensions.

At least in my v1.0.1 version of the crypto scalar spec, I don't see
Zbc. That seems to be defined in the bit manipulation extensions.