illumos won't boot on Xen 4.8 HVM in DomU because o APIC
illlumos (e.g. current OpenIndiana hipster) stuck booting on Xen 4.8 HVM in DomU if APIC is enabled, with APIC removed from the VM guest (e.g. remove
<features> in guest's libvirt XML description) it boots fine.
Traces with APIC present and w/o APIC attached.