Re: [PATCH v4 01/26] dt-bindings: interrupt-controller: Add Arm GICv5

Peter Maydell
2025-06-03T08:49:28Z

On Tue, 3 Jun 2025 at 08:48, Lorenzo Pieralisi <lpieralisi@kernel.org> wrote:
>
> On Thu, May 29, 2025 at 02:17:26PM +0100, Peter Maydell wrote:
> > The dt bindings do allow for describing Secure-world devices:
> > Documentation/devicetree/bindings/arm/secure.txt has the
> > details. We use this in QEMU so we can provide a DTB to
> > guest EL3 firmware that tells it where the hardware is
> > (and which EL3 can then pass on to an NS kernel). It would
> > be helpful for the GICv5 binding to be defined in a way that
> > we can do this for a GICv5 system too.
>
> It would be good to understand what DT {should/should not} describe and
> whether this DT usage to configure firmware is under the DT maintainers
> radar or it is an attempt at reusing it to avoid implementing a
> configuration scheme.

It is definitely on the radar, not under it -- that is the whole
reason that we went to the effort to agree and document secure.txt
in the upstream binding documentation :-)

-- PMM