Patent ID: 7490216
Filing Date: 2009-02-10
Classification: G06F

Abstract:
1. In a virtual computer system comprising a system hardware, a virtual machine monitor and a virtual machine, the virtual computer system having at least a first operating state and a second operating state, a method for providing access to address translations for multiple virtual address spaces, the method comprising: providing a first page table having address translations from a first virtual address space to a physical address space, the first virtual address space being used by software within the virtual machine monitor during the first operating state; providing a second page table having address translations from a second virtual address space to the same physical address space, the second virtual address space being used by software within the virtual machine during the second operating state; causing the system hardware to use the first page table during the first operating state and the second page table during the second operating state; and in response to an attempted memory access for which the system hardware does not find a translation for a virtual address: