<p>Thanks - virtio devices may be configured to expose both I/O and memory BARs, with either type being enough to drive the device. It is basically a back-compat setup where older drivers can still use I/O ports and newer may choose to use the so called "modern" interface.</p>

<p>We would like to avoid enabling PCI_COMMAND_IO / PCI_COMMAND_MEM if the driver is not going to use it.</p>

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