Multiple partition adjunct instances interfacing multiple logical partitions to a self-virtualizing input/output device
US8645974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jan 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/1056
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Multiple logical partitions are provided access to a self-virtualizing input/output device of a data processing system via multiple dedicated partition adjunct instances. Access is established by: interfacing each logical partition to one or more associated partition adjunct instances, each partition adjunct instance coupling its associated logical partition to one of a virtual function or a queue pair of the self-virtualizing input/output device, and each partition adjunct instance being a separate dispatchable state and being created employing virtual address space donated from the respective logical partition or a hypervisor of the data processing system, and each partition adjunct instance including a device driver for the virtual function or queue pair of the self-virtualizing input/output device; and providing each logical partition with at least one virtual input/output which is interfaced through the logical partition's respective partition adjunct instance(s) to a virtual function or queue pair of the self-virtualizing input/output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.