Avi Kivity wrote: > No, definitely not define a hypercall ABI. The feature bit should say > "this device understands a hypervisor-specific way of kicking. consult > your hypervisor manual and cpuid bits for further details. should you > not be satisfied with this method, port io is still available". ...unless you're lucky enough to be on s390 where pio is not available. I don't see why we'd have two different ways to talk to a virtio device. I think we should use a hypercall for interrupt injection, without support for grumpy old soldered pci features other than HPA-style Lguest PCI bus organization. There are no devices that we want to be backward compatible with.
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