HYBRID VIRTUALIZATION METHOD FOR INTERRUPT CONTROLLER IN NESTED VIRTUALIZATION ENVIRONMENT

摘要

Disclosed is a hybrid virtualization method for an interrupt controller in nested virtualized environment, which can reduce guest interrupt latency. A hybrid virtualization method includes operating a Virtual Machine Manager (VMM) which enables a program executed on a host and a program executed on a guest to be simultaneously used, providing, by the VMM, a virtual interrupt configuration register to the guest, and selectively utilizing full virtualization and partial virtualization. Full virtualization is used when guests which are running simultaneously request the same interrupt. In this case, the interrupt is trapped by the VMM before being injected to the different guests. Partial virtualization allows a guest to directly handle incoming interrupt and avoids expensive traps to the hypervisor to reduce the latency. This virtualization technique can be used by any kind of VMM which is physical hypervisor or virtual hypervisor for processing interrupts of their respective guests.