04 June 2021. Summary of changes for version 20210604:
This release is available at https://acpica.org/downloads
1) ACPICA kernel-resident subsystem:
Cleaned up (delete) the context mutex during local address handler object deletion.
Fixed a memory leak caused by the _CID repair function.
Added support for PlatformRtMechanism OperationRegion handler. Adds a new utility function, AcpiUtConvertUuidToString. Writing a buffer to a PlatformRtMechanism fieldunit invokes a bidirectional transaction. The input buffer contains 26 bytes containing 9 bytes of status, a command byte and a 16-byte UUID. This change will simply pass this incoming buffer to a handler registered by the OS.
2) iASL Compiler/Disassembler and ACPICA tools:
Added full support for the PRMT ACPI table (Platform Runtime Mechanism Table). Includes support in the iASL compiler, the disassembler, and the template generator.
Added full support for the BDAT (BIOS Data ACPI Table) ACPI table.
Added full support for the RGRT (Regulatory Graphics Resource Table) ACPI table.
Added full support for the SVKL (Storage Volume Key Location Table) ACPI table. Header file support from Kuppuswamy Sathyanarayanan .
Completed full support for the IVRS (I/O Virtualization Reporting Structure) ACPI table. Added compiler support for IVRS, updated disassembler support. Adds a new utility, UtIsIdInteger, to determine if a HID/CID is an integer or a string.
Headers: Added more structs to the CEDT table: CXL fixed memory window structure.
ACPI 6.4: MADT: added Multiprocessor Wakeup Mailbox Structure.