Method and device for memory virtualization

Abstract

The embodiment of the invention discloses a memory virtualization method and device, which relate to the field of electronic information technology, and can avoid using the kernel of a host machine to modify the mapping relationship when the mapping relationship needs to be modified. The method of the present invention includes: establishing a mapping relationship between the HVA layer and the storage space of the hard disk; assigning an address space in the HVA layer for the process of the client computer, and establishing a link between the GVA layer and the allocated address space in the HVA layer Mapping relationship; establish a mapping relationship between the address on the allocated address space in the HVA layer pointed to by the memory access instruction and the storage space of the hard disk; obtain the target data from the host computer. The present invention is applicable to the scene of virtualizing the memory of the computing device.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a memory virtualization method and device. Background technique [0002] At present, when using a virtual machine, it is necessary to make the memory space layout seen by the guest operating system the same as that in the real physical machine environment, which requires virtualization of the memory. After the memory is virtualized, it generally contains multi-level address space mapping and forms an address mapping layer, including GVA (Guest Virtual Address, client virtual address) layer, GPA (Guest Physical Address, client physical address) layer, HVA (Host Virtual Address, host virtual address) layer, HPA (Host Physical Address, host physical address) layer. Wherein, the mapping from the HVA layer to the HPA layer is maintained by the host operating system and recorded in the Host page table of the host. And in the prior art, shadow page table technology is c...

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, the operation of the shadow page table is a privileged operation that needs to use the system kernel of the host machine, and because different host machines often use different operating systems or architectures, different operating systems or architectures The way of privilege operation is also different. Therefore, it is difficult for a virtual machine based on shadow page table technology running on one host to run directly on another operating system or a host with a different architecture. It takes time and effort for technicians to Only by reformulating the way of privileged operation of the shadow page table technology for another operating system or architecture can the virtual machine based on the shadow page table technology be able to run on another host with a different operating system, which limits the virtual machine in Migration on different system platforms using

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