This document is not a guide nor a wiki; this is just for whenever I have doubts about the definition of XML for libvirt, I can use this example with VIRTIO and IDE disks.

<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
  virsh edit DebianServer
or other application using the libvirt API.
-->
 
<domain type="kvm"><name>DebianServer</name><uuid>793c72e4-f257-4669-809b-c3e5f5915940</uuid><memory unit="KiB">4194304</memory><currentmemory unit="KiB">2097152</currentmemory><vcpu current="4" placement="static">8</vcpu><os><type arch="x86_64" machine="pc-i440fx-2.1">hvm</type><boot dev="hd"></boot></os><features><acpi><apic><pae></pae></apic></acpi></features><cpu match="exact" mode="custom"><model fallback="allow">SandyBridge</model><vendor>Intel</vendor><feature name="pbe" policy="require"><feature name="tm2" policy="require"><feature name="est" policy="require"><feature name="monitor" policy="require"><feature name="osxsave" policy="require"><feature name="smx" policy="require"><feature name="ss" policy="require"><feature name="vme" policy="require"><feature name="dtes64" policy="require"><feature name="ht" policy="require"><feature name="ds" policy="require"><feature name="pcid" policy="require"><feature name="tm" policy="require"><feature name="pdcm" policy="require"><feature name="vmx" policy="require"><feature name="ds_cpl" policy="require"><feature name="xtpr" policy="require"><feature name="acpi" policy="require"><feature name="invtsc" policy="require"></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></feature></cpu><clock offset="utc"><timer name="rtc" tickpolicy="catchup"><timer name="pit" tickpolicy="delay"><timer name="hpet" present="no"></timer></timer></timer></clock><on_poweroff>destroy</on_poweroff><on_reboot>restart</on_reboot><on_crash>restart</on_crash><pm><suspend-to-mem enabled="no"><suspend-to-disk enabled="no"></suspend-to-disk></suspend-to-mem></pm><devices><emulator>/usr/bin/kvm</emulator><disk device="disk" type="file"><driver cache="writeback" name="qemu" type="qcow2"><source file="/var/lib/libvirt/images/Debian8-Server.qcow2"><target bus="virtio" dev="vda"><address bus="0x00" domain="0x0000" function="0x0" slot="0x07" type="pci">
     
    <disk device="cdrom" type="block"><driver name="qemu" type="raw"><target bus="ide" dev="hda"><readonly><address bus="0" controller="0" target="0" type="drive" unit="0">
     
    <controller index="0" model="ich9-ehci1" type="usb"><address bus="0x00" domain="0x0000" function="0x7" slot="0x05" type="pci">
     
    <controller index="0" model="ich9-uhci1" type="usb"><master startport="0"><address bus="0x00" domain="0x0000" function="0x0" multifunction="on" slot="0x05" type="pci">
     
    <controller index="0" model="ich9-uhci2" type="usb"><master startport="2"><address bus="0x00" domain="0x0000" function="0x1" slot="0x05" type="pci">
     
    <controller index="0" model="ich9-uhci3" type="usb"><master startport="4"><address bus="0x00" domain="0x0000" function="0x2" slot="0x05" type="pci">
     
    <controller index="0" model="pci-root" type="pci"><controller index="0" type="ide"><address bus="0x00" domain="0x0000" function="0x1" slot="0x01" type="pci">
     
    <controller index="0" type="virtio-serial"><address bus="0x00" domain="0x0000" function="0x0" slot="0x06" type="pci">
     
    <interface type="bridge"><mac address="52:54:00:e9:c7:8b"><source bridge="br0"><model type="virtio"><address bus="0x00" domain="0x0000" function="0x0" slot="0x03" type="pci">
     
    <serial type="pty"><target port="0"></target></serial><console type="pty"><target port="0" type="serial"></target></console><channel type="spicevmc"><target name="com.redhat.spice.0" type="virtio"><address bus="0" controller="0" port="1" type="virtio-serial">
     
    <input bus="usb" type="tablet"><input bus="ps2" type="mouse"><input bus="ps2" type="keyboard"><graphics autoport="yes" type="spice"><sound model="ich6"><address bus="0x00" domain="0x0000" function="0x0" slot="0x04" type="pci"><video><model heads="1" ram="65536" type="qxl" vram="65536"><address bus="0x00" domain="0x0000" function="0x0" slot="0x02" type="pci">
     
    <redirdev bus="usb" type="spicevmc"></redirdev><redirdev bus="usb" type="spicevmc"></redirdev><redirdev bus="usb" type="spicevmc"></redirdev><redirdev bus="usb" type="spicevmc"></redirdev><memballoon model="virtio"><address bus="0x00" domain="0x0000" function="0x0" slot="0x08" type="pci">
     
    <panic></panic></address></memballoon></address></model></video></address></sound></graphics></address></target></channel></address></model></mac></interface></address></controller></address></controller></controller></address></master></controller></address></master></controller></address></master></controller></address></controller></address></readonly></target></driver></disk></address></target></driver></disk></devices></domain>

Tianocore

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hvm/root/tianobios.bin