On Mon, 2012-06-18 at 13:14 +0300, Avi Kivity wrote: > On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote: > > >> (vhost, > >> msi-less ivshmem clone)? > > > > I guess vhost can poll eventfd and reinject an interrupt. > > Of course to bypass qemu completely we also need to support reads over > > ioeventfd somehow. > > > > eventfd is not suitable for level triggered interrupts as far as I can > tell. It's about passing edges, and level interrupts aren't. We need > something like a pipe for communicating state (or just use KVM_IRQ_LINE). Isn't level just two edges with a state in between? Sure we may be unnecessarily de-asserting for brief periods, but for an external assigned device, we don't know whether it's unnecessary. Thanks, Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
