Re: [Qemu-devel] [PATCH 09/16] Enable message delivery via IRQs

[Paul Brook]

> This patch allows to optionally attach a message to an IRQ event. The
> message can contain a payload reference and a callback that the IRQ
> handler may invoke to report the delivery result. The former can be used
> to model message signaling interrupts, the latter to cleanly implement
> IRQ de-coalescing logics.

I don't like this. qemu_irq is a level triggered interface. Redundant calls to 
qemu_set_irq should (in principle) be a no-op.  If you want message passing 
then IMO you should be using something else.

Paul