Virtualization system for computers with a region-based memory architecture
US7089377B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2002 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Mar 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1036
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a computer system with a non-segmented, region-based memory architecture, such as Intel IA-64 systems, two or more sub-systems share a resource, such as a virtual-to-physical address mapping and need to have overlapping regions of the virtual address space for accessing different physical addresses. Virtual addresses include a portion that is used to identify which region the issuing sub-system wants to access. For example, the region-identifying portion of virtual addresses may select a region register whose contents point to a virtual-to-physical address mapping for the corresponding region. To protect a second sub-system S2 from a first S1, whenever the S1 issues an address in a region occupied by S2, the region for the S2 is changed. This allows S1 to issue its addresses without change. In a preferred embodiment of the invention, S2 is a virtual machine monitor (VMM) and S1 is a virtual machine running on the VMM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.