Re: [libvirt] [PATCH] libvirt: xen: do not use ioemu type for any emulated NIC

Unfortunately not true. You always get the enulated NIC, whatever you do with type=ioemu.

From what I see (and at least from Xen side expect) is that you always get both. Whether you use default or a specific NIC type. The only way for your guest not to get an emulated device is to disable the pci-platform device in the config. Otherwise the Xen approach is to always present both and let the guest decide whether it is capable of using the pv devices (which are faster). Then the guest unplugs the emulated devices so there is no confusion. The goal there is to have one configuration on the hosting side which allows the guest to switch as it is capable. So currently with the default setting for the NIC, you get the implicit model or rtl8139 and the paravirt NIC. Newer Linux guests will, if they think they can handle paravirt devices, unplug the emulated interfaces (NICs and disks). I would expect a similar behavior from the Windows drivers. So with the default, there should be no need to change the model. However with the current libvirt, when you do select something like e1000, then the Xen configuration gets a type=ioemu added. But that does _not_ prevent the paravirt interface to be present, its "just" unusable because it does not have a MAC address.