Re: [Qemu-devel] [PATCH v2 1/3] cpu: make CPU_INTERRUPT_RESET available on all targets

[Paolo Bonzini]

Il 06/03/2013 03:02, Peter Crosthwaite ha scritto:
> If you truly have connectivity from device land to the CPU cluster
> should that be reflected by some sort of QOM linkage?

I think in real hardware what happens is that a single "wire" is
distributed to all CPUs.  Devices do not have direct links to all the
CPUs, they are agnostic of how many CPUs they control (at least on x86).
 In this sense, using first_cpu is the right modelling in my opinion.

Having qemu_irqs for all the reset requests would definitely be a good
thing to do.  In the meanwhile, however, having half of the reset
signals as qemu_irqs, and the other half as function calls would be
confusing.

Alternatively we could add some kind of "meta-device" that distributes
stuff to all CPUs, and hide the usage of first_cpu there.  Andreas, what
do you think?

Paolo