Non-unified cache coherency maintenance for virtual machines
US11210222B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jan 23, 2018 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Jan 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/152
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An example method of maintaining cache coherency in a virtualized computing system includes: trapping access to a memory page by guest software in a virtual machine at a hypervisor managing the virtual machine, where the memory page is not mapped in a second stage page table managed by the hypervisor; performing cache coherency maintenance for instruction and data caches of a central processing unit (CPU) in the virtualized computing system in response to the trap; mapping the memory page in the second stage page table with execute permission; and resuming execution of the virtual machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.