Re: QEMU features useful for Xen development?

[Peter Maydell <peter.maydell@xxxxxxxxxx>]

On Thu, 31 Aug 2023 at 11:49, Alex Bennée <alex.bennee@xxxxxxxxxx> wrote:
> Peter Maydell <peter.maydell@xxxxxxxxxx> writes:
> > All our MPS2/MPS3 boards are M-profile. That means we have the
> > device models for all the interesting devices on the board, but
> > it would be simpler to write the an536 board model separately.
> > (In particular, the M-profile boards are wrappers around an
> > "ARMSSE" sort-of-like-an-SoC component; there's no equivalent
> > for the Cortex-R52.)
> >
> >>   https://developer.arm.com/documentation/dai0536/latest/
>
> It's not super clear from the design notes but it does mention the
> SSE-200 sub-system as the basis for peripherals. Specifically the blocks
> are:
>
>   Arm Cortex-R52 Processor
>   Arm CoreSight SoC-400 (n/a for QEMU)
>   Cortex-M System Design Kit
>   PL022 Serial Port
>   NIC-400 Network interconnect
>
> But if writing it from scratch is simpler so be it. The real question is
> what new hardware would we need to model to be able to bring something
> up that is useful to Xen?

Just the board, basically. The SSE-200 is specifically a
dual-Cortex-M33 block; all the references to it in the
AN536 appnote look like cases where text wasn't sufficiently
cleaned up when creating it based on the M-profile doc...

-- PMM