linux-kernel - Re: [PATCH v4 6/6] dt-bindings: riscv: document vector crypto requirements

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Message-ID: <0788826e-4b96-49ca-94ac-1d5b92f9ee64@ghiti.fr>
Date: Tue, 25 Mar 2025 14:51:28 +0100
From: Alexandre Ghiti <alex@...ti.fr>
To: Conor Dooley <conor@...nel.org>, linux-riscv@...ts.infradead.org
Cc: Conor Dooley <conor.dooley@...rochip.com>,
 Eric Biggers <ebiggers@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Clément Léger
 <cleger@...osinc.com>, Andy Chiu <andybnac@...il.com>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v4 6/6] dt-bindings: riscv: document vector crypto
 requirements

On 12/03/2025 14:11, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
>
> The Unpriv spec states:
> | The Zvknhb and Zvbc Vector Crypto Extensions --and accordingly the
> | composite extensions Zvkn, Zvknc, Zvkng, and Zvksc-- require a Zve64x
> | base, or application ("V") base Vector Extension. All of the other
> | Vector Crypto Extensions can be built on any embedded (Zve*) or
> | application ("V") base Vector Extension.
>
> Enforce the minimum requirement via schema.
>
> Link: https://github.com/riscv/riscv-isa-manual/blob/main/src/vector-crypto.adoc#extensions-overview
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>   .../devicetree/bindings/riscv/extensions.yaml | 33 +++++++++++++++++++
>   1 file changed, 33 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index 02065664f819..9aeb9d4731ca 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -726,6 +726,39 @@ properties:
>               - contains:
>                   const: zve64f
>   
> +      - if:
> +          contains:
> +            anyOf:
> +              - const: zvbc
> +              - const: zvkn
> +              - const: zvknc
> +              - const: zvkng
> +              - const: zvknhb
> +              - const: zvksc
> +        then:
> +          contains:
> +            anyOf:
> +              - const: v
> +              - const: zve64x
> +
> +      - if:
> +          contains:
> +            anyOf:
> +              - const: zvbb
> +              - const: zvkb
> +              - const: zvkg
> +              - const: zvkned
> +              - const: zvknha
> +              - const: zvksed
> +              - const: zvksh
> +              - const: zvks
> +              - const: zvkt
> +        then:
> +          contains:
> +            anyOf:
> +              - const: v
> +              - const: zve32x
> +
>   allOf:
>     # Zcf extension does not exist on rv64
>     - if:


Ok I see now where you enforce the right dependencies, you can ignore my 
question in patch 2.

Thanks,

Alex