Runtime modification of property names in advanced configuration and power interface (ACPI) tables

摘要

A system and method are disclosed for efficient runtime modification of device property names in Advanced Configuration and Power Interface (ACPI) tables. In accordance with one embodiment, a computer system determines whether a device supports a device property, and when the device does not support the device property, a device property name corresponding to the device name is modified in a particular entry of an ACPI table, such that a checksum for that entry remains unchanged. The modified device property name indicates to the computer system that the device does not support the device property.

主权项

1. A method comprising:
determining, by a computer system, whether a device identified in a system table supports a device property; and when the device does not support the device property, modifying, in an entry of the system table, a device property name corresponding to the device property; wherein the system table comprises a plurality of entries, each entry associating a respective device name with a respective device property name, and each entry comprising a respective checksum in view of the respective device name and the respective device property name; and wherein the modified device property name indicates to the computer system that the device does not support the device property; and wherein the modified device property name does not impact the checksum of the corresponding entry.