Systems and methods for maintaining CRTM code
US8943491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2008 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Apr 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/2022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments comprise systems, methods and media for updating CRTM code in a computing machine. In one embodiment, the CRTM code initially resides in ROM and updated CRTM is stored in a staging area of the ROM. A logical partition of L2 cache may be created to store a heap and a stack and a data store. The data store holds updated CRTM code copied to the L2 cache. When a computing system is started, it first executes CRTM code. The CRTM code checks the staging area of the ROM to determine if there is updated CRTM code. If so, then CRTM code is copied into the L2 cache to be executed from there. The CRTM code loads the updated code into the cache and verifies its signature. The CRTM code then copies the updated code into the cache where the current CRTM code is located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.