Oracle has a unique position in the virtualization market as an Enterprise application, operating system and hardware vendor that delivers technologies across the stack. Owning the entire stack has various advantages:

Oracle VM support is an add-on component of Oracle's enterprise support package that offers an end-to-end single vendor support solution from the application to the disk. A single support call covers the entire Oracle stack which expedites problem resolution. Using Oracle support allows an Oracle support service request (SR) to transition between support teams with issues that require cross stack collaboration. For example, if you open a service request for an application issue and the root cause is at the virtualization layer then the service request will transition between the application and virtualization teams.