On Sun, 2013-06-23 at 17:07 +0300, Michael S. Tsirkin wrote: > Yes I think that's fine really. > > Basically devices all speak MSIMessage as they should - > this is what the PCI spec says. > On all normal systems guests also speak MSIMessage so > the API which uses these makes sense for kvm. > Except, ppc architecture in its wisdom decided to hide this > in firmware. QEMU does not have firmware so the translation > has to be maintained in QEMU powerpc code.
It is still not enough. There is nothing that says that an MSI address/message is unique. On pseries (among others I'm sure), this is a per-host-bridge concept since the MSIs are decoded by the PHB and turned into standard fabric interrupts there. So at least the bus needs to be passed as well. Cheers, Ben.
