Domain identifier and device identifier translation by an input-output memory management unit
US11494211B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 22, 2019 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Dec 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/45583
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic device includes a processor that executes a guest operating system and a hypervisor, an input-output (IO) device, and an input-output memory management unit (IOMMU). The IOMMU handles communications between the IOMMU and the guest operating system by: replacing, in communications received from the guest operating system, guest domain identifiers (domainIDs) with corresponding host domainIDs and/or guest device identifiers (deviceIDs) with corresponding host deviceIDs before further processing the communications; replacing, in communications received from the IO device, host deviceIDs with guest deviceIDs before providing the communications to the guest operating system; and placing, into communications generated in the IOMMU and destined for the guest operating system, guest domainIDs and/or guest deviceIDs before providing the communications to the guest operating system. The IOMMU handles the communications without intervention by the hypervisor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.