linux-kernel - Re: [PATCH v1 2/6] dt-bindings: hypervisor: Add binding for MediaTek GenieZone hypervisor

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Date:   Thu, 13 Apr 2023 15:05:05 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Yi-De Wu <yi-de.wu@...iatek.com>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Yingshiuan Pan <yingshiuan.pan@...iatek.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Jades Shih <jades.shih@...iatek.com>,
        Miles Chen <miles.chen@...iatek.com>,
        Ivan Tseng <ivan.tseng@...iatek.com>,
        My Chuang <my.chuang@...iatek.com>,
        Shawn Hsiao <shawn.hsiao@...iatek.com>,
        PeiLun Suei <peilun.suei@...iatek.com>,
        Ze-Yu Wang <ze-yu.wang@...iatek.com>,
        Liju Chen <liju-clr.chen@...iatek.com>
Subject: Re: [PATCH v1 2/6] dt-bindings: hypervisor: Add binding for MediaTek
 GenieZone hypervisor

On 13/04/2023 11:07, Yi-De Wu wrote:
> From: "Yingshiuan Pan" <yingshiuan.pan@...iatek.com>
> 
> Add documentation for GenieZone(gzvm) node. This node informs gzvm
> driver to start probing if geniezone hypervisor is available and

Subject: drop second/last, redundant "binding for". The "dt-bindings"
prefix is already stating that these are bindings.

> able to do virtual machine operations.
> 
> Signed-off-by: Yingshiuan Pan <yingshiuan.pan@...iatek.com>
> Signed-off-by: Yi-De Wu <yi-de.wu@...iatek.com>
> ---
>  .../bindings/hypervisor/mediatek,gzvm.yaml    | 30 +++++++++++++++++++
>  1 file changed, 30 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hypervisor/mediatek,gzvm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hypervisor/mediatek,gzvm.yaml b/Documentation/devicetree/bindings/hypervisor/mediatek,gzvm.yaml
> new file mode 100644
> index 000000000000..35e1e5b18e47
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hypervisor/mediatek,gzvm.yaml
> @@ -0,0 +1,30 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hypervisor/mediatek,gzvm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek GenieZone hypervisor
> +
> +maintainers:
> +  - Yingshiuan Pan <yingshiuan.pan@...iatek.com>
> +
> +description:
> +  GenieZone is MediaTek proprietary hypervisor. This device node informs its
> +  driver, gzvm, to probe if platform supports running virtual machines.

Do not describe Linux, we all know how driver binding works, but
hardware/firmware/hypervisor.

I don't know if we actually want to support proprietary hypervisors.
There can be hundreds of them, one per each SoC manufacturer, and they
can come with many ridiculous ideas.

> +
> +properties:
> +  compatible:
> +    const: mediatek,gzvm
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    hypervisor {
> +        compatible = "mediatek,gzvm";
> +        status = "okay";

Drop status.

Best regards,
Krzysztof