A KVM virtual machine network card pass-through method and device for a host

Abstract

The invention discloses a kvm virtual machine network card pass-through method and a device thereof for a host, including receiving a network card pass-through request sent by a virtual machine, determining the number of network cards required by the virtual machine, and controlling the hardware virtualization function of the host and the opening state of Intel_iommu ;According to the number of network cards required by the virtual machine, select the corresponding number of physical network cards from the PCI address list of the physical network cards in the host, and obtain the PCI addresses of the selected physical network cards; The xml configuration file of the physical network card; call the connection interface between the host and the virtual machine, and send the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the NIC pass-through request, for the virtual machine to use the selected physical network card. The invention enables the virtual machine to directly use the physical network card of the host, simplifies the signal transmission process, and optimizes the performance of the virtual machine.

Description

technical field [0001] The invention relates to the technical field of virtualization, in particular to a KVM virtual machine network card pass-through method and device for a host. Background technique [0002] Virtualization refers to virtualizing a computer into multiple logical computers (virtual machines) through virtualization technology. Run multiple logical computers on one computer at the same time, each logical computer can run a different operating system, and the application programs can run in independent spaces without affecting each other, thereby significantly improving the work efficiency of the computer. Among them, a physical computer is called a host, and multiple logical computers are called clients. [0003] At present, the network card used by the virtual machine is a virtual network card, which is obtained by virtualizing the physical network card on the host. The virtual machine cannot directly use the physical network card on the host, which makes ...

AI Technical Summary

Problems solved by technology

[0003] At present, the network card used by the virtual machine is a virtual network card, which is obtained by virtualizing the physical network card on the host. The virtual machine cannot directly use the physical network card on the host, which makes the performance of the network card of the virtual machine poor and the speed of signal transmission slower

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