linux-kernel - Re: [PATCH -fixes v2 2/4] dt-bindings: riscv: Add ratified privileged ISA versions

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Date: Tue, 13 Feb 2024 17:03:46 +0000
From: Conor Dooley <conor@...nel.org>
To: Samuel Holland <samuel.holland@...ive.com>
Cc: Palmer Dabbelt <palmer@...belt.com>,
	Andrew Jones <ajones@...tanamicro.com>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stefan O'Rear <sorear@...tmail.com>
Subject: Re: [PATCH -fixes v2 2/4] dt-bindings: riscv: Add ratified
 privileged ISA versions

On Mon, Feb 12, 2024 at 07:37:33PM -0800, Samuel Holland wrote:
> The baseline for the RISC-V privileged ISA is version 1.10. Using
> features from newer versions of the privileged ISA requires the
> supported version to be reported by platform firmware, either in the ISA
> string (where the binding already accepts version numbers) or in the
> riscv,isa-extensions property. So far two newer versions are ratified.
> 
> Signed-off-by: Samuel Holland <samuel.holland@...ive.com>
> ---
> 
> Changes in v2:
>  - New patch for v2
> 
>  .../devicetree/bindings/riscv/extensions.yaml | 20 +++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index 63d81dc895e5..7faf22df01af 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -121,6 +121,16 @@ properties:
>              version of the privileged ISA specification.
>  
>          # multi-letter extensions, sorted alphanumerically

> +        - const: sm1p11

Why are we beholden to this "1p11" format of RVI's? We have free choice
of characters here, what's stopping us using "machine-v1.11", for
example?

Thanks,
Conor.

> +          description:
> +            The standard Machine ISA v1.11, as ratified in the 20190608
> +            version of the privileged ISA specification.
> +
> +        - const: sm1p12
> +          description:
> +            The standard Machine ISA v1.12, as ratified in the 20211203
> +            version of the privileged ISA specification.
> +
>          - const: smaia
>            description: |
>              The standard Smaia supervisor-level extension for the advanced
> @@ -134,6 +144,16 @@ properties:
>              added by other RISC-V extensions in H/S/VS/U/VU modes and as
>              ratified at commit a28bfae (Ratified (#7)) of riscv-state-enable.
>  
> +        - const: ss1p11
> +          description:
> +            The standard Supervisor ISA v1.11, as ratified in the 20190608
> +            version of the privileged ISA specification.
> +
> +        - const: ss1p12
> +          description:
> +            The standard Supervisor ISA v1.12, as ratified in the 20211203
> +            version of the privileged ISA specification.
> +
>          - const: ssaia
>            description: |
>              The standard Ssaia supervisor-level extension for the advanced
> -- 
> 2.43.0
> 
> 
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

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