Collapsed Address Translation With Multiple Page Sizes

A method of caching address translations in a memory architecture, comprising:

• storing translations between a first address domain and a second address domain to a first logical portion of a first storage unit;
• storing translations between the second addressing domain and a third address domain to a second logical portion of the first storage unit;
• storing translations between the first address domain and the third address domain, based on entries in the first storage unit, to a second storage unit;
• and
• matching an address request against the second storage unit and outputting a corresponding address result.

A circuit comprising:

• a translation lookaside buffer (TLB) configured to store translations between address domains, the TLB addressable as a guest TLB and a root TLB, the guest TLB configured to store translations between a guest virtual address (GVA) domain and a guest physical address (GPA) domain, the root TLB configured to store translations between the GPA domain and a root physical address (RPA) domain;
• a collapsed TLB configured to store translations between the GVA domain and the RPA domain based on entries in the TLB;
• and
• a processor configured to match an address request against the collapsed TLB and output a corresponding address result.

A circuit comprising:

• a first storage unit configured to store translations between a plurality of address domains, the first storage unit including a plurality of logical portions, each of the plurality of logical portion configured to store translations between two of the plurality of address domains, the plurality of address domains including at least a first address domain and a final address domain;
• a second storage unit configured to store translations between the first address domain and at least one of an intermediate and the final address domain based on entries in the first storage unit;
• and
• a processor configured to match an address request against the second storage unit and output a corresponding address result.