Apparatus, system and method for controlling access to facilities based on usage classes

A computer program product stored in a computer readable, recordable-type medium for controlling access to host channel adapter facilities, comprising:

• first instructions for receiving a request from a requestor for access to a host channel adapter facility, the request including an address;
• second instructions for identifying a page of memory associated with the address;
• third instructions for determining a usage class of the requestor based on the identification of the page of memory;
• and
• fourth instructions for controlling access to the host channel adapter facility based on the usage class of the requestor, wherein the usage class is a usage class from a hierarchical set of usage classes identifying increasing levels of access to host channel adapter facilities.

An apparatus for controlling access to host channel adapter facilities, comprising:

• means for receiving a request from a requestor for access to a host channel adapter facility, the request including an address;
• means for identifying a page of memory associated with the address;
• means for determining a usage class of the requestor based on the identification of the page of memory;
• and
• means for controlling access to the host channel adapter facility based on the usage class of the requestor, wherein the usage class is a usage class from a hierarchical set of usage classes identifying increasing levels of access to host channel adapter facilities.