Direct I/O virtualization method and device used for multi-root sharing system

Abstract

The invention discloses a direct I/O (Input/Output) virtualization method and device used for a multi-root I/O virtualization sharing system. The method comprises the following steps: 1, a logic virtualization function mirror is established through the logical abstraction of a physical I/O device function, the logic virtualization function mirror replaces the I/O device function to be used as a device placeholder of a slave root node, and each function in an I/O device is independently found and configured by a plurality of root nodes; 2, the mapping of the device function between the PCIe (peripheral component interconnect express) domain of the slave root node and a master control root node is realized in a hardware re-mapping mode, a pass-mode is provided for each root node when the operation shared physical I/O device is accessed, and at the same time isolation and protection are provided for the sharing of each root node; and 3, the I/O device function can be dynamically deleted and added to the root nodes under the condition that other jobs of the root nodes are not affected through the virtual hot plug control operation of a PCIe device, and each function in the I/O device is dynamically shared by the root nodes.

Description

technical field [0001] The invention relates to I / O virtualization technology, in particular to the sharing technology of I / O device virtualization by different virtual machines on multiple root nodes. Background technique [0002] In a traditional data center or cloud computing center, each blade server has independent I / O resources, such as network cards and HBA adapters. However, the tight coupling of computing and I / O resources makes the expansion of the two types of resources limited by the server space at the same time. In addition, high-performance I / O devices (such as 10GigE network cards) are only attached to one server, which undoubtedly reduces their utilization efficiency and increases the total system cost. In order to solve the above problems, it is necessary to release the tight coupling between computing and I / O resources, and the key is to realize the sharing of I / O devices among multiple servers. [0003] In recent years, the sharing technology of I / O dev...

AI Technical Summary

Problems solved by technology

However, due to the major changes to the original system by the MR-IOV protocol of PCI-SIG (including the modification of the PCIe basic protocol, PCIe device structure and PCIe switch structure), it is difficult to be accepted by the industry

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