Re: [PATCH 1/1] hw/arm/sbsa-ref: use XHCI to replace EHCI

[Peter Maydell]

On Thu, 1 Jun 2023 at 16:30, Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> W dniu 1.06.2023 o 17:01, Peter Maydell pisze:
> > On Wed, 31 May 2023 at 17:37, Leif Lindholm <quic_llindhol@quicinc.com> 
> > wrote:
>
> >> Ah, thanks! That explains why we did the thing that made no sense :)
> >>
> >> To skip the migration hazard, my prefernece is we just leave the EHCI
> >> device in for now, and add a separate XHCI on PCIe. We can drop the
> >> EHCI device at some point in the future.
> >
> > Why PCIe for the XHCI and not sysbus? At the time the board
> > was originally added the argument was in favour of using
> > a sysbus USB controller (you can see Ard making that point
> > in the linked archive thread).
>
> So something like below? I only tested does system boot into Debian.
> To make it work also changes to EDK2 would be needed to list XHCI
> controller in DSDT.

Yes, and you also want to drop the useless EHCI controller,
and (as you note) both these things mean firmware changes
so presumably that's a version-bump event?

-- PMM