On 2012-01-26 16:15, Avi Kivity wrote: > The changes to kvm-apic are so drastic, that merging them into qemu-kvm > in the normal way won't work. I can consider just dropping the existing > implementation and switching to the new one, but the comment at the end > > Make the basic in-kernel irqchip support selectable via > -machine ...,kernel_irqchip=on. Leave it off by default until it can > fully replace user space models. > > suggests that things are still missing. > > Jan, what's still missing?
- in-kernel PIT (patches done, waiting for some upstream bits to be merged first) - TPR acceleration via VAPIC (WIP) - MSI support The latter is the big chunk. It requires quite some refactoring/enhancement of the MSI layer. I posted the first version last year. We need to agree on the design, then probably switch qemu-kvm over while pushing generic bits upstream. And then we can extend the upstream in-kernel *PIC using that new interfaces. Once upstream works with MSI, we can switch qemu-kvm over, leaving basically only device-assignment as the last missing bit. > Any idea on how to proceed? I had a qemu-kvm branch here that disables the upstream in-kernel *PIC in favor of its current version. I still need to refresh that work (was based on an earlier revision), but it was not that horrible. Let me check... Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux
