[PATCH RFC 1/3] dt-bindings: riscv: Add Svukte entry

[Conor Dooley]

On Fri, Sep 20, 2024 at 03:39:03PM +0800, Max Hsu wrote:
> Add an entry for the Svukte extension to the riscv,isa-extensions
> property.
> 
> Reviewed-by: Samuel Holland <samuel.holland at sifive.com>
> Signed-off-by: Max Hsu <max.hsu at sifive.com>
> ---
>  Documentation/devicetree/bindings/riscv/extensions.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index a06dbc6b4928958704855c8993291b036e3d1a63..df96aea5e53a70b0cb8905332464a42a264e56e6 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -171,6 +171,13 @@ properties:
>              memory types as ratified in the 20191213 version of the privileged
>              ISA specification.
>  
> +        - const: svukte
> +          description:
> +            The standard Svukte supervisor-level extensions for making user-mode
> +            accesses to supervisor memory raise page faults in constant time,
> +            mitigating attacks that attempt to discover the supervisor
> +            software's address-space layout, as PR#1564 of riscv-isa-manual.

I'm surprised this doesn't fail dt_binding_check, with the # in it. I'd
like to see a commit hash here though, in the same format as the other
extensions using them.

> +
>          - const: zacas
>            description: |
>              The Zacas extension for Atomic Compare-and-Swap (CAS) instructions
> 
> -- 
> 2.43.2
> 
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