Virtual machine system based on the management technology of equipment access storage and equipment access control method thereof

Abstract

The invention provides a virtual machine system based on the management technology of equipment access storage and an equipment access control method thereof. The virtual machine system comprises a virtual machine monitor, an underlying hardware supporting the management technology of storage for equipment input and output, an equipment control module and a plurality of virtual machines; wherein the virtual machine monitor comprises a scheduling module which can schedule different virtual machines to run on a processor, a memory virtualization module used for completing memory management of the virtual system, an interrupt virtualization module, an instruction analyzer, a privilege calling interface used for providing services for privilege entity and a control module of a storage management unit of equipment input and output. In the virtual machine system, one equipment control module corresponds to physical equipment and is responsible for initiating privilege calling to the virtual machine monitor, receiving and executing an equipment port access instruction transmitted by the virtual machine monitor, detecting equipment state and hiding the virtualization equipment resources and the like. In the equipment access method provided by the invention, a client operating system in the virtual machine can access equipment data by a memory mapping mode; and the equipment utilizes the equipment access storage management technology to carry out direct storage access to virtual machine data. The virtual machine system and the equipment access control method lead the equipment performance to be improved greatly, relieve the system performance bottle-neck, and improve safety of equipment access control. The equipment access control method does not need to modify the client operating system, is easy to be realized and has wide application range.

Description

technical field [0001] The invention relates to a virtual machine system, in particular to a virtual machine system based on device access memory management technology and a device access control method thereof. Background technique [0002] With the development of computer systems, the computing power of modern computer systems can no longer be fully utilized, and virtualization technology has been widely used. Virtualization technology enables multiple virtual machines to run on one physical platform, and each virtual machine runs an independent operating system. However, the virtualization technology will bring performance loss, especially the access to the hardware device becomes the bottleneck of the whole system. Therefore, how to improve the performance of the virtual machine system, especially the efficiency of the virtual machine's access to the device is an urgent problem to be solved at present. [0003] The current mainstream device access control methods inclu...

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Since the target memory address needs to be embedded in the DMA request, all memo

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