On 10/30/2017 01:42 PM, Cornelia Huck wrote: > On Mon, 30 Oct 2017 09:28:09 +0100 > Christian Borntraeger <borntrae...@de.ibm.com> wrote: > >> Now I thought about that for a while and I start to think that we cannot >> implement ais >> in QEMU and cover all cases. >> One aspect was certainly passthrough (like you handled in patch 4). >> Another aspect is that some interrupts might be injected from the kernel - >> even for >> emulated devices. e.g. virtio-pci together with vhost-net, will inject >> interrupts via >> the set_irq callback. I think disabling irqfd for these cases is not a good >> idea. > > Is there still a fallback for irqfd emulation?
it might disable dataplane or other things. (it once did). So I think we should not go down this path. > >> >> So what about adding a new KVM capability (for 4.14), fixup the other things >> in >> QEMU and then bind it to the new capability? > > For 4.15, surely? > > Probably the only way we can make this work correctly... >
