1.. SPDX-License-Identifier: GPL-2.0-only 2 3============================== 4WMI embedded Binary MOF driver 5============================== 6 7Introduction 8============ 9 10Many machines embed WMI Binary MOF (Managed Object Format) metadata used to 11describe the details of their ACPI WMI interfaces. The data can be decoded 12with tools like `bmfdec <https://github.com/pali/bmfdec>`_ to obtain a 13human readable WMI interface description, which is useful for developing 14new WMI drivers. 15 16The Binary MOF data can be retrieved from the ``bmof`` sysfs attribute of the 17associated WMI device. Please note that multiple WMI devices containing Binary 18MOF data can exist on a given system. 19 20WMI interface 21============= 22 23The Binary MOF WMI device is identified by the WMI GUID ``05901221-D566-11D1-B2F0-00A0C9062910``. 24The Binary MOF can be obtained by doing a WMI data block query. The result is 25then returned as an ACPI buffer with a variable size. 26