linux-kernel - Re: [RFC PATCH 1/3] dt-bindings: Add ARM PSA FF binding for non-secure VM partitions

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Message-ID: <CAL_JsqKFDBmyAVjWR9ZxOjU6j2fcCOz32rnnUwBAQzzh-vMa_A@mail.gmail.com>
Date:   Wed, 10 Jun 2020 07:56:28 -0600
From:   Rob Herring <robh@...nel.org>
To:     Will Deacon <will@...nel.org>
Cc:     Sudeep Holla <sudeep.holla@....com>, devicetree@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: [RFC PATCH 1/3] dt-bindings: Add ARM PSA FF binding for
 non-secure VM partitions

On Wed, Jun 10, 2020 at 1:43 AM Will Deacon <will@...nel.org> wrote:
>
> On Tue, Jun 09, 2020 at 04:35:51PM -0600, Rob Herring wrote:
> > On Mon, Jun 01, 2020 at 10:45:10AM +0100, Sudeep Holla wrote:
> > > Add devicetree bindings for a Arm PSA FF-A compliant non-secure partition
> > > at virtual interface(VMs).
> > >
> > > Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> > > ---
> > >  .../devicetree/bindings/arm/arm,psa-ffa.txt   | 47 +++++++++++++++++++
> > >  1 file changed, 47 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/arm/arm,psa-ffa.txt
> >
> > I'm hoping this goes away if the firmware is discoverable, but if not DT
> > bindings are DT schema now.
>
> We'll need the binding for the kvm host side, because there are plenty
> of partition properties that are not discoverable (e.g. number of vCPUs).

BTW, there's already a partitioning binding for Power in ePAPR. I've
not paid much attention to it, but maybe it could be useful here.

Rob