Multi-virtual-domain-facing customized PCIe (peripheral component interface express) periphery equipment tree generating method

Abstract

The invention discloses a multi-virtual-domain-facing customized PCIe (peripheral component interface express) periphery equipment tree generating method which includes the steps of firstly, configuring equipment access authority, and assigning a service virtual domain; secondly, by the service virtual domain, executing the third step, and by a common virtual domain, executing the sixth step when equipment tree data exists in a VMM (virtual machine manager); thirdly, by the service virtual domain, scanning to generate a equipment tree; fourthly, by the service virtual domain, writing the equipment tree data into the VMM; fifthly, by the service virtual domain, deleting equipment tree nodes which do not belong to the service virtual domain and starting an operating system; sixthly, by the common virtual domain, generating equipment nodes according to equipment access authority, and loading drivers; and seventhly, common virtual domain, starting the operating system. By the method, multi-virtual-domain customized hardware view is supported, consistency of bottom hardware configuration is guaranteed, conflicts caused by hardware scanning / accessing by multiple virtual domains is avoided, transparent firmware virtualization support to the upper operating system is achieved, and compatibility and safety of a Feiteng server are increased.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method for generating a customizable PCIe peripheral device tree oriented to multiple virtual domains. Background technique [0002] Phytium server is a computer platform developed by National University of Defense Technology and based on Phytium processor FT1000. The FT1000 processor is a general-purpose 64-bit processor developed by National University of Defense Technology and compatible with the sparc instruction set. Each chip contains 8 computing cores and supports Up to 64 hardware threads. For peripherals, the Feiteng server expands the PCIe bus through the PCI-Express Unit integrated on the FT1000 processor (implements the root complex in the PCIe bus) on the hardware, PCI-Express Unit and PCIe switching unit (PCIe switch) The PCIe switch is connected with a PCIe slot or a specific PCIe device behind it. In terms of software, the biggest difference between the Phytium platfo...

AI Technical Summary

Problems solved by technology

Secondly, it is required that the configuration of the device must be unified and consistent in each virtual domain, because all peripherals are on the same hardware platform, inconsistent configuration will lead to access conflicts

However, the existing device tree generation method obtains the device tree by scanning the PCIe bus through the firmware, which cannot meet the above requirements

First of all, the device tree generated in this way is a complete device tree, which cannot realize the peripheral view control of different virtual domains

Exposing the entire device to the operating system in this way can lead to potential access violations and security risks

What's more serious is that since the firmware of each virtual domain scans and operates the PCIe bus independently, and the configuration of each device on the bus must be modified during the scanning process (for example, when obtaining the size information of the bar), this modification will inevitably affect Access to the peripheral from other virtual domains, causing peripheral access failures

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