Providing copies of input-output memory management unit registers to guest operating systems
US10909053B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 27, 2019 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | May 27, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/151
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic device includes a processor that executes a guest operating system, an input-output memory management unit (IOMMU), and a main memory that stores an IOMMU backing store. The IOMMU backing store includes a separate copy of a set of IOMMU memory-mapped input-output (MMIO) registers for each guest operating system in a set of supported guest operating systems. The IOMMU receives, from the guest operating system, a communication that accesses data in a given IOMMU MMIO register. The IOMMU then performs a corresponding access of the data in a copy of the given IOMMU MMIO register in the IOMMU backing store associated with the guest operating system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.