New kvm toy received. Totally virtio and managed by virsh from libvirt.

Converting kvm arguments to virsh xml while browsing through libvirt spaghetti code for hints.

shell command

/usr/bin/kvm -boot c -m 1024 -smp 3 -vnc :1 -k en \
-drive index=0,if=virtio,boot=on,file=/data/kvm/kvm-slave.qcow2 \
-net nic,model=virtio -net tap,ifname=tap0,script=no,downscript=no

to virsh xml

<domain type='kvm'>
<name>kvm-slave</name>
<uuid>8974f244-f27b-40f5-a25c-628b91c02e4b</uuid>
<memory>1048576</memory>
<currentMemory>1048576</currentMemory>
<vcpu>3</vcpu>
<os>
<type>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<source file='/data/kvm/kvm-slave.qcow2,boot=on'/>
<target dev='vda' bus='virtio'/>
</disk>
<interface type='ethernet'>
<target dev='tap0'/>
<model type='virtio'/>
<script path='no'/>
</interface>
<graphics type='vnc' port='5902' listen=':' keymap='en'/>
</devices>
</domain>

Notice:
1) tap0 should not created by virsh so using type=ethernet instead of type=bridge
2) if using disk virtio from file, libvirt 0.6.2 is not adding boot=on, be dirty and using filename as option field (spaghetti code)