linux-kernel - Re: [PATCH v2] dt-bindings: riscv: Add SiFive vendor extensions description

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Message-ID: <20250801-lunar-stream-0fdb3f0febec@spud>
Date: Fri, 1 Aug 2025 20:31:28 +0100
From: Conor Dooley <conor@...nel.org>
To: Nick Hu <nick.hu@...ive.com>
Cc: Alexandre Ghiti <alex@...ti.fr>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...ive.com>, devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Samuel Holland <samuel.holland@...ive.com>
Subject: Re: [PATCH v2] dt-bindings: riscv: Add SiFive vendor extensions
 description

On Fri, Aug 01, 2025 at 03:01:12PM +0800, Nick Hu wrote:
> Add description for SiFive vendor extensions "xsfcflushdlone",
> "xsfpgflushdlone" and "xsfcease". This is used in the SBI
> implementation [1].
> 
> [1] https://lore.kernel.org/opensbi/20250708074940.10904-1-nick.hu@sifive.com/
> 

> Changes in v2:
> - Update the message to indicate the user of the extensions.

This should be below the --- line.
With that,
Acked-by: Conor Dooley <conor.dooley@...rochip.com>
although I suppose it'll be me taking this and I can fix it up on
application?

> 
> Signed-off-by: Nick Hu <nick.hu@...ive.com>
> ---
>  .../devicetree/bindings/riscv/extensions.yaml  | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index ede6a58ccf53..5638297759df 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -663,6 +663,24 @@ properties:
>              https://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf
>  
>          # SiFive
> +        - const: xsfcease
> +          description:
> +            SiFive CEASE Instruction Extensions Specification.
> +            See more details in
> +            https://www.sifive.com/document-file/freedom-u740-c000-manual
> +
> +        - const: xsfcflushdlone
> +          description:
> +            SiFive L1D Cache Flush Instruction Extensions Specification.
> +            See more details in
> +            https://www.sifive.com/document-file/freedom-u740-c000-manual
> +
> +        - const: xsfpgflushdlone
> +          description:
> +            SiFive PGFLUSH Instruction Extensions for the power management. The
> +            CPU will flush the L1D and enter the cease state after executing
> +            the instruction.
> +
>          - const: xsfvqmaccdod
>            description:
>              SiFive Int8 Matrix Multiplication Extensions Specification.
> -- 
> 2.17.1
> 

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