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.