Re: CPU reset vs DeviceState reset

[Peter Maydell]

Doh, I meant to cc Eduardo and Marcel but forgot...

On Mon, 2 Mar 2020 at 17:20, Peter Maydell <address@hidden> wrote:
>
> Hi; I've just noticed that although TYPE_CPU is a subclass of
> TYPE_DEVICE, it seems to implement its own reset method
> ('reset' field in CPUClass struct) rather than just using the
> DeviceClass's 'reset'.
>
> Is there a reason for doing this, or is it just historical legacy
> from TYPE_CPU originally not being a subclass of TYPE_DEVICE?
>
> I ask because I'd like to be able to use 3-phase reset in the Arm
> CPU, and I'm wondering whether it would be better to make TYPE_CPU
> just use Device's reset system, or to treat TYPE_CPU as its own
> base class and implement Resettable there. The former seems more
> straightforward, unless I'm missing something that means we
> really do need to have the reset method be different.
>
> thanks
> -- PMM