Processor with protection of an isolated memory and protection method for the isolated memory accessible only by a trusted core
US12013782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2022 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Dec 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7209
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processor with protection of an isolated memory and protection method for the isolated memory accessible only by a trusted core are shown. A processor has a trusted core with a right to access an isolated memory planned on a system memory, a normal core prohibited from accessing the isolated memory, and a last-level cache shared by the trusted core and the normal core. The in-core cache structure of the normal core and the last-level cache are included in a hierarchical cache system. In response to a memory access request issued by the normal core, the hierarchical cache system determines whether the memory access request hits the isolated memory and, if yes, the hierarchical cache system rejects the memory access request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.