linux-kernel - Re: [PATCH v3 05/20] dt-bindings: riscv: add scalar crypto ISA extensions description

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Message-ID: <c5766c6b-5a85-48ab-89c5-9bc43aeb20bd@rivosinc.com>
Date:   Wed, 8 Nov 2023 16:11:39 +0100
From:   Clément Léger <cleger@...osinc.com>
To:     Conor Dooley <conor@...nel.org>
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>,
        Evan Green <evan@...osinc.com>,
        Samuel Ortiz <sameo@...osinc.com>
Subject: Re: [PATCH v3 05/20] dt-bindings: riscv: add scalar crypto ISA
 extensions description



On 08/11/2023 15:57, Conor Dooley wrote:
> Yo,
> 
> On Tue, Nov 07, 2023 at 11:55:41AM +0100, Clément Léger wrote:
>> +        - const: zkr
>> +          description:
>> +            The standard Zkr entropy source extension as ratified in version
>> +            1.0 of RISC-V Cryptography Extensions Volume I specification.
> 
> So the topic of the seed CSR came up on the U-Boot ML in the last few
> days:
> https://lore.kernel.org/u-boot/20231107212431.GP6601@bill-the-cat
> I think we need to document that having zkr in riscv,isa-extensions
> means that the CSR is accessible at the privilege level to which that
> devicetree has been provided.

Hi Conor,

Indeed, seems like a good idea.

Thanks,

Clément