Realm identifiers for realms for memory access control
US11176061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2018 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Nov 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/1052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Memory access circuitry (26) enforces ownership rights for memory regions. A given memory region is associated with an owner realm specified from multiple realms, each realm corresponding to a portion of at least one software process executed by processing circuitry (8). The owner realm has a right to exclude other realms from accessing data within the memory region. Realm management circuitry (20) accesses a realm management tree storing realm management data for at least two realms in a tree structure having a variable number of levels. The realms are identified using a realm identifier which has a variable number of variable length bit portions each providing an index into a given level of the realm management tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.