Virtual machine monitor, virtual machine system and its internal memory processing method

Abstract

The invention provides a virtual machine monitor, a virtual machine system and a memory treatment method, wherein the virtual machine monitor comprises a distribution module, a first setting module and a first mapping module, the distribution module is used to respectively distribute physical memory for each client operating system in a plurality of client operating systems, the first setting module is used to arrange available physical memory in the physical memory which corresponds to each client operating system, the addresses of the available physical memory which corresponds to each client operating system do not cross. The first mapping module is used to build a corresponding first mapping relation between the available physical memory which corresponds to each client operating system and a first machine memory, and the address of the first machine memory is same to the address of the available physical memory which corresponds to each client operating system. The invention achieves the DMA visiting of a plurality of GOS.

Description

technical field [0001] The invention relates to virtual machine technology, in particular to a virtual machine monitor, a virtual machine system and a memory processing method thereof. Background technique [0002] In the existing virtualization process, there is a common virtual device platform, including a virtual sound card, a virtual graphics card, etc., and a virtual machine monitor (Virtual Machine Monitor, VMM) converts the guest operating system (Guest OS, GOS) to the virtual Virtual devices in the device platform are accessed to real hardware through a service operating system (Service OS, SOS) or a host operating system (Host OS). [0003] The above architecture cannot solve the problem of multiple GOS sharing real hardware. Therefore, in the above-mentioned general virtualization platform, no matter what the real hardware platform is, the virtualized devices are the same, although this is applicable to all guest operating systems , but the following problems will...

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Problems solved by technology

[0003] The above architecture cannot solve the problem of multiple GOS sharing real hardware. Therefore, in the above-mentioned general virtualization platform, no matter what the real hardware platform is, the virtualized devices are the same, although this is applicable to all guest operating systems , but the following problems will occur:

[0008] However, the above-mentioned virtual machine system and its hardware device access method can only solve the DMA transmission problem of one GOS. When there are multiple GOSs in the virtual machine system, the DMA transmission problem of all GOSs cannot be realized.

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