Maximum payload value modification method and system, equipment and medium

Abstract

The invention discloses a maximum payload value modification method. The modification method comprises the following steps executed based on a BIOS: conducting initialization in response to receivinga starting instruction; obtaining a GPIO value of a mainboard; determining a maximum payload value to be obtained according to the value GPIO; judging whether hot plug is supported or not; in responseto the support hot plug, acquiring a maximum payload value corresponding to the support hot plug based on the maximum payload value to be obtained; and updating a corresponding variable by utilizingthe maximum payload value corresponding to the hot plug support. The invention further discloses a system, computer equipment and a readable storage medium. According to the scheme provided by the invention, the setting of PCIe Max Payload Size can be automatically and dynamically changed according to a project, manual modification of option default values and codes is not needed, recompilation isnot needed, it is possible that one BIOS code is compatible with all projects, multiple sets of codes do not need to be developed according to different projects, the code quality is improved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of BIOS, in particular to a modification method, system, device and storage medium of a maximum effective load value. Background technique [0002] The Max Payload Size parameter of PCIe determines the maximum payload that a TLP packet may use. For the PCIe ROOT PORT of IIO, there is an option on the BIOS setup page to set its Max Payload Size: "PCI-E Port Max Payload Size", the optional settings are: 128B, 256B, 512B and Auto. Among them, Auto means set to the maximum value that the device can support. Different customers have different requirements for this parameter. For example, customer A requires the default MaxPayload Size to be 256B, and the default setting for ports that support hot swap is 256B; while customer B requires the default Max Payload Size to be The port to be plugged and unplugged is set to 128B by default. [0003] The existing solution is to provide two different sets of codes to two customer...

AI Technical Summary

Problems solved by technology

However, when using the existing solution to customize the BIOS for different customers, the default setting of "PCI-E Port Max Payload Size" must be modified, and the code needs to be modified to determine whether the PCIe hot-swap function is enabled, and then recompile to generate a different BIOS files, provided to different clients

That is to say, the existing solution cannot be automatically adapted, and multiple sets of codes must be used, which cannot be applied to a set of BIOS codes compatible with all projects corresponding to different users

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