Methods for accessing multiple page tables in a computer system
US7490216B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Sep 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1036
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A virtual memory system implementing the invention provides concurrent access to translations for virtual addresses from multiple address spaces. One embodiment of the invention is implemented in a virtual computer system, in which a virtual machine monitor supports a virtual machine. In this embodiment, the invention provides concurrent access to translations for virtual addresses from the respective address spaces of both the virtual machine monitor and the virtual machine. Multiple page tables contain the translations for the multiple address spaces. Information about an operating state of the computer system, as well as an address space identifier, are used to determine whether, and under what circumstances, an attempted memory access is permissible. If the attempted memory access is permissible, the address space identifier is also used to determine which of the multiple page tables contains the translation for the attempted memory access.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.