Method of accessing multiple virtual address spaces and computer system

A method according to clam 1, wherein the field for storing the machine identifier in the translation pair memory is also used for storing an identifier of a host computer.

A computer system operable as a virtual machine system capable of accessing multiple virtual address spaces in a computer system comprising a plurality of access registers, each for retaining a space identifier in correspondence with a general register usable as a base register;

• access register translation means for translating a space identifier, which is retained in an access register, into an origin address for use in virtual-physical address translation;
• and a translation pair memory accessible in response to a space identifier for storing translation pairs, each including a space identifier, which was subjected to translation by said access register translation means, and an origin address, and for supplying said origin address upon access by the space identifier of the translation pair, wherein each entry of the translation pair memory is exclusively used for a respective one of a plurality of guest virtual machines for supplying to a virtual-physical address translator an origin address accessed in response to an applied space identifier.

A computer system operable as a virtual machine system capable of accessing multiple virtual address spaces, the computer system comprising:

• (a) a plurality of access registers for retaining respective space identifiers, each access register being provided in association with a general register usable as a bass register;
• (b) access register translation means for translating a space identifier, which is retained in an access register, into an origin address for use in virtual-physical translation;
• (c) a translation pair memory, accessible in response to a space identifier received from an access register, for storing translation pairs, each including a translated space identifier and an associated origin address and for supplying an origin address when accessed by a space identifier, said translation pair memory also having storage areas each for storing a machine identifier of a guest virtual machine which is accessible in association with each translation pair.