Solaris 11 hangs during boot in OVM 3.3.3

If after upgrading Oracle VM to version 3.3.3 your Solaris 11 VMs with more than 2 CPUs don’t boot anymore, you should read this article:

https://docs.oracle.com/cd/E50245_01/E63729/html/vmrns-solaris11-hangs-boot-2CPU.html

Oracle incompatible with Oracle? It seems like it.