Messages in this thread | | | Subject | Re: [PATCH V6 6/6] kvm: add fast mmio capabilitiy | From | Paolo Bonzini <> | Date | Tue, 15 Sep 2015 18:47:21 +0200 |
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On 15/09/2015 18:44, Cornelia Huck wrote: >> > Can you explain why? If there is any non-zero valid length, "wildcard >> > length" (represented by zero) would also make sense. > What is a wildcard match supposed to mean in this case? The datamatch > field contains the queue index for the device specified in the address > field. The hypercall interface associated with the eventfd always has > device + queue index in its parameters; there is no interface for > "notify device with all its queues".
Ah, I see. Because all valid virtio-ccw ioeventfds are datamatch, no valid virtio-ccw ioeventfd is wildcard-length.
Paolo
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