linux-kernel - Re: [PATCH v2 2/7] dt-bindings: hypervisor: Add MediaTek GenieZone hypervisor

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Date:   Fri, 28 Apr 2023 16:24:11 -0500
From:   Rob Herring <robh@...nel.org>
To:     Yi-De Wu <yi-de.wu@...iatek.com>
Cc:     Yingshiuan Pan <yingshiuan.pan@...iatek.com>,
        Ze-Yu Wang <ze-yu.wang@...iatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arch@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        David Bradil <dbrazdil@...gle.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Jade 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>,
        Liju Chen <liju-clr.chen@...iatek.com>
Subject: Re: [PATCH v2 2/7] dt-bindings: hypervisor: Add MediaTek GenieZone
 hypervisor

On Fri, Apr 28, 2023 at 06:36:17PM +0800, 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
> able to do virtual machine operations.

Why can't the driver just try and do virtual machine operations to see 
if the hypervisor is there? IOW, make your software interfaces 
discoverable. DT is for non-discoverable hardware.

Rob