Re: [PATCH v4 7/8] hw/arm/sbsa-ref: add ITS support in SBSA GIC

[Leif Lindholm]

On Thu, Jul 08, 2021 at 21:05:02 +0100, Peter Maydell wrote:
> On Thu, 8 Jul 2021 at 20:40, Leif Lindholm <leif@nuviainc.com> wrote:
> > I think my summary-summary would be:
> > - I think we will need to introduce a compatiblity-breaking change to
> >   sbsa-ref.
> > - I think we will need to have support for more than one ITS if we're
> >   going to be able to use QEMU to prototype real systems.
> > - I think we should then start versioning sbsa-ref (like many other
> >   platforms already are). And there are other reasons why I would want
> >   to do this.
> > - But I think it would be unfair to hold this set back for it.
> 
> FWIW, I do not currently expect this series to make 6.1, so we
> have some time to get things right.

Ah, ok.

Then I would ideally like to see this patch add the ITS block between
Distributor and Redistributors regions. I think it makes the most sense
for this version to match the GIC-600 layout.

I am also going to rework those two remaining gicv4-ish patches based
on my acquired understanding, to be sent out post v6.1.

And, I would like to switch the default CPU of sbsa-ref to "max" as
part of that platform versioning, now that is supported in TF-A
(from v2.5).

/
    Leif