Bounded WMI subsystem ported from Linux 7.1 drivers/platform/wmi/core.c
and drivers/platform/x86/lg-laptop.c:
- wmi.rs: guid_block (20-byte _WDG entry) parser, PNP0C14 device discovery
(candidate-path _HID probe mirroring EC discovery), _WDG buffer read via
aml_eval (AmlSerdeValue::Buffer), event-GUID enumeration (flags &
ACPI_WMI_EVENT), _WED evaluation for eventcode decode, LG keymap
(0x70 control-panel / 0x74 touchpad-toggle / 0xf020000 read-mode /
0x10000000 kbd-backlight). 4 unit tests cover guid_block parsing,
event flag detection, short-input rejection, and keymap coverage.
- power_events.rs: WMI notify handling in the AML notification drain —
when a Notify fires on the WMI device, _WED is evaluated to decode the
eventcode, mapped to a key name, and emitted as PowerEvent::Wmi.
- main.rs: WMI discovery at init (after wake registry). PowerEvent::Wmi
logged in the main loop.
- acpi.rs: wmi_registry field on AcpiContext.
Works on any x86 WMI laptop (LG, Dell, HP, Lenovo, ASUS, etc.).
On QEMU (no PNP0C14) it is a no-op.
Red Bear OS