Re: [PATCH 1/2] KVM: device: add simple registration mechanism for kvm_device_ops

[Will Deacon <will.deacon@arm.com>]

On Fri, Jun 27, 2014 at 03:17:57PM +0100, Paolo Bonzini wrote:
> Il 26/06/2014 19:30, Will Deacon ha scritto:
> > kvm_ioctl_create_device currently has knowledge of all the device types
> > and their associated ops. This is fairly inflexible when adding support
> > for new in-kernel device emulations, so move what we currently have out
> > into a table, which can support dynamic registration of ops by new
> > drivers for virtual hardware.
> >
> > I didn't try to port all current drivers over, as it's not always clear
> > which initialisation hook the ops should be registered from.
> 
> Conny, Alex (Graf & Williamson),
> 
> can you help Will here?  The idea looks sane, but I'd rather merge it 
> with all devices converted.

Also, if we want to use an IDR instead of an array then dynamic registration
will be required, since I can't initialise the former statically.

I can convert kvm_vfio_ops with an initcall, but the others (mpic, xics and
flic) should probably hang off the host irqchip initialisation, no?

All help appreciated! I'm happy to collate diffs :) Failing that, I'll have
a crack at it myself, but I've got no way of testing the result.

Will