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Extended PSS ACPI 方法规范

更新日期: 4月 19日 2007年

Extended PSS (XPSS) 方法是一种 ACPI 方法,它允许平台固件描述基于 Model Specific Register (MSR) 的接口,使用此接口可以实现处理器性能状态控制。此方法可以使用 Windows 中包含的通用处理器驱动程序,无需使用由 Microsoft 开发的并特别为目标平台设计的特定 Windows 处理器驱动程序。

Windows Vista
Windows Server 2008

Windows 中的处理器驱动程序支持
扩展 _PSS 的基本原理
使用 XPSS 的要求
XPSS (Extended Performance States)
实现 XPSS 接口




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  1. Provided that you comply with all terms and conditions of this Agreement, Microsoft grants to you the following non-exclusive, worldwide, royalty-free, perpetual, non-transferable, non-sublicensable, limited license under any copyrights or patents that cover the Extended PSS (XPSS) ACPI method described in the Specification and that are owned or licensable by Microsoft without payment of consideration to third parties,

    1. to reproduce copies of the Specification for you and your contractor's internal use for the sole purpose of (1) modifying your firmware and/or BIOS for computing devices ("Firmware") so that it writes to memory the appropriate XPSS ACPI method in the Specification or (2) modifying your software so that it may read from memory the appropriate XPSS ACPI method (the "Purpose"),

    2. to implement the XPSS ACPI method in your firmware and/or BIOS,

    3. to license to third parties directly and indirectly the XPSS ACPI method as part of your Firmware (and any related documentation),

      The foregoing license is granted only to the extent necessary to accomplish the Purpose and to license and/or distribute your Firmware containing the XPSS ACPI method to third parties. The foregoing license shall not extend to any features of your Firmware that (i) are not required to comply with the Specification or (ii) to which there was a practicable alternative to infringing a patent.

  2. Microsoft reserves all other rights it may have in the Specification, its implementation and any intellectual property therein. The furnishing of this Specification does not give you or any other entity any license to any other Microsoft patents, trademarks, copyrights or other intellectual property rights. Microsoft does not grant to you or any other entity any implied licenses or rights whatsoever under this Agreement. Specifically, this Agreement does not grant any express or implied licenses or rights to any enabling technologies that may be necessary to fully utilize the XPSS ACPI method described in the Specification.


  1. You must implement XPSS Interface in its entirety (e.g., all fields) and without modification (e.g., parameter encoding and permissible values as described in the Specification).

  2. Your license rights to the Specification are conditioned upon you not creating, modify, or distributing your Firmware in a way that such creation, modification, or distribution may (a) create, or purport to create, obligations for Microsoft with respect to the Specification (or intellectual property therein) or (b) grant, or purport to grant, to any third party any rights or immunities to Microsoft's intellectual property or proprietary rights in the Specification.

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