Re: [Qemu-devel] [Qemu-ppc] [PATCH] RFCv3 kvm irqfd: support msimessage to irq translation in PHB

[Benjamin Herrenschmidt]

On Sun, 2013-06-30 at 10:59 +1000, Alexey Kardashevskiy wrote:
> > 1) A PCI bus function to do the MSI -> virq mapping
> > 2) On x86 (and e500), this is implemented by calling 
> > kvm_irqchip_add_msi_route()
> > 3) On pseries, this just returns msi->data
> > 
> > Perhaps (2) can just be the default PCI bus implementation to simplify 
> > things.
> 
> 
> hw/pci/pci.c does not have any kvm code yet and I would like not to be the
> first person who tries adding this there :)
> But ok, I'll do it.

Unless I'm confused (which is very possible) I seem to remember that there was
duplication of that MSI / KVM mapping between virtio-pci and vfio as well,
so it makes sense to move it to the PCI code.

Cheers,
Ben.