linux-kernel - Re: [PATCH v5 11/14] dt-bindings: riscv: add MMU Standard Extensions support for Svpbmt

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Message-ID: <Yf2pxvmG0t6eugOz@robh.at.kernel.org>
Date:   Fri, 4 Feb 2022 16:33:42 -0600
From:   Rob Herring <robh@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        wefu@...hat.com, liush@...winnertech.com, guoren@...nel.org,
        atishp@...shpatra.org, anup@...infault.org, drew@...gleboard.org,
        hch@....de, arnd@...db.de, wens@...e.org, maxime@...no.tech,
        dlustig@...dia.com, gfavor@...tanamicro.com,
        andrea.mondelli@...wei.com, behrensj@....edu, xinhaoqu@...wei.com,
        huffman@...ence.com, mick@....forth.gr,
        allen.baum@...erantotech.com, jscheid@...tanamicro.com,
        rtrauben@...il.com, samuel@...lland.org, cmuellner@...ux.com,
        philipp.tomsich@...ll.eu
Subject: Re: [PATCH v5 11/14] dt-bindings: riscv: add MMU Standard Extensions
 support for Svpbmt

On Fri, Jan 21, 2022 at 05:36:15PM +0100, Heiko Stuebner wrote:
> From: Wei Fu <wefu@...hat.com>
> 
> Previous patch has added svpbmt in arch/riscv and add "riscv,svpmbt"
> in the DT mmu node. Update dt-bindings related property here.
> 
> Signed-off-by: Wei Fu <wefu@...hat.com>
> Co-developed-by: Guo Ren <guoren@...nel.org>
> Signed-off-by: Guo Ren <guoren@...nel.org>
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> Cc: Anup Patel <anup@...infault.org>
> Cc: Palmer Dabbelt <palmer@...belt.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
> index aa5fb64d57eb..3ad2593f1400 100644
> --- a/Documentation/devicetree/bindings/riscv/cpus.yaml
> +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
> @@ -63,6 +63,16 @@ properties:
>        - riscv,sv48
>        - riscv,none
>  
> +  mmu:

riscv,mmu

> +    description:
> +      Describes the CPU's MMU Standard Extensions support.
> +      These values originate from the RISC-V Privileged
> +      Specification document, available from
> +      https://riscv.org/specifications/
> +    $ref: '/schemas/types.yaml#/definitions/string'
> +    enum:
> +      - riscv,svpbmt

Are there per vendor MMU extensions? If not, drop the 'riscv,' part. 

> +
>    riscv,isa:
>      description:
>        Identifies the specific RISC-V instruction set architecture
> -- 
> 2.30.2
> 
>