System and method for regulating access to memory mapping information at a memory management unit
US9280491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2015 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | May 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/657
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A first storage location at a memory management unit stores physical address information mapping logical physical addresses to actual physical addresses. A second storage location stores an allowed address range of actual physical addresses. A memory management unit determines whether a write access to the first storage location is allowable. The access is to store memory mapping information relating to a first actual physical address. The memory management unit prevents the write access if the first actual physical address is not in the allowed address range, and does not prevent the write access if the first actual physical address is in the allowed address range. The memory management unit prevents a write access to the second storage location by a process that is not running in a hypervisor mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.