1. A method of performing a translation from a guest virtual address to a host physical address in a virtual machine environment, the method comprising: receiving a guest virtual address from a host computer executing a guest virtual machine program; determining a guest physical address, the guest physical address being determined using the guest virtual address and a first level address translation executed on the host computer; performing a second level address translation using at least one table and the guest physical address as an index; reading a host physical address and an access override information from the at least one table; and providing the host physical address and access override information to the host computer; wherein, the access override information performs access control over the host physical address, the access control overriding a guest-defined access protection on the guest physical address, and wherein the translation from the guest virtual address to the host physical address is performed without intervention by the host computer.