Re: [Qemu-devel] [PATCH 3/5] hw/arm/pxa2xx: Add reset method for pxa2xx_ssp

[Peter Maydell]

On 6 June 2015 at 00:06, Peter Crosthwaite <address@hidden> wrote:
> But I have some follow up design questions, mainly in that I have
> started using individual device resets that back onto the ->reset hook
> to implement reset controllers. This means an IRQ source should reset
> its IRQ pin to notify its sinks of the state change as those sinks
> will not get a reset callback.
>
> I know its not supported by the current reset semantic but can we
> start doing this going forward?

Device reset is a sink and a quagmire. Note incidentally that what
we call "reset" in QEMU is actually "we hard powercycled the simulation",
not an emulated reset. If you can propose some coherent and workable
semantics I think it would be nice if we could clean things up.
(You may find you need two-phase reset by analogy with two-phase init...)

-- PMM