Product : Oracle, Oracle VM/3.4, x86 Edition
Feature : Maintenance Mode, VM Mobility, VM Mobility and HA
Content Owner:  Roman Macek
Summary
Yes - Maintenance Mode
Details
It is possible to execute the Maintenance Mode and It is also possible to Lock some Servers to not receive this Offload of Virtual Machines from the Server that is entering in this State. More info on: http://docs.oracle.com/cd/E64076_01/