linux-kernel - Re: [PATCH v2 3/7] virt: geniezone: Introduce GenieZone hypervisor support

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Date:   Fri, 12 May 2023 10:59:40 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     "Yi-De Wu (吳一德)" 
        <Yi-De.Wu@...iatek.com>
Cc:     "corbet@....net" <corbet@....net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
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        <angelogioacchino.delregno@...labora.com>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "MY Chuang (莊明躍)" 
        <MY.Chuang@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
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        "Shawn Hsiao (蕭志祥)" 
        <shawn.hsiao@...iatek.com>,
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        <linux-arm-kernel@...ts.infradead.org>,
        "Yingshiuan Pan (潘穎軒)" 
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        "Ivan Tseng (曾志軒)" 
        <ivan.tseng@...iatek.com>
Subject: Re: [PATCH v2 3/7] virt: geniezone: Introduce GenieZone hypervisor support

On Fri, 12 May 2023 08:17:58 +0100,
"Yi-De Wu (吳一德)" <Yi-De.Wu@...iatek.com> wrote:
> 
> On Fri, 2023-04-28 at 23:12 +0100, Marc Zyngier wrote:
> > External email : Please do not click links or open attachments until
> > you have verified the sender or the content.
> > 
> > 
> > On 2023-04-28 11:36, Yi-De Wu wrote:
> > > From: "Yingshiuan Pan" <yingshiuan.pan@...iatek.com>
> > > 
> > > +config MTK_GZVM
> > > +     tristate "GenieZone Hypervisor driver for guest VM operation"
> > > +     depends on ARM64
> > > +     depends on KVM
> > 
> > NAK.
> > 
> > Either this is KVM, and this code serves no purpose, or it is a
> > standalone
> > hypervisor, and it *cannot* have a dependency on KVM.
> > 
> > [...]
> > 
> 
> In order to be self-contained and avoid dependency like with KVM, may
> we leverage KVM's symbol, macro e.g. VGIC_NR_SGIS,
> VGIC_NR_PRIVATE_IRQS...etc, and copy or rename the related part to
> */geniezone/?

Again, these are architected constants. You can have your own. You can
already consider any use of a KVM structure or symbol as a bug.

	M.

-- 
Without deviation from the norm, progress is not possible.