System and method for discovering and protecting allocated resources in a shared virtualized I/O device
US8312461B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Sep 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1441
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system includes a virtualized I/O device coupled to one or more processing units. The virtualized I/O device includes a storage for storing a resource discovery table, and programmed I/O (PIO) configuration registers corresponding to hardware resources. A system processor may allocate the plurality of hardware resources to one or more functions, and to populate each entry of the resource discovery table for each function. The processing units may execute one or more processes. Given processing units may further execute OS instructions to allocate space for an I/O mapping of a PIO configuration space in a system memory, and to assign a function to a respective process. Processing units may execute a device driver instance associated with a given process to discover allocated resources by requesting access to the resource discovery table. The virtualized I/O device protects the resources by checking access requests against the resource discovery table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.