
Version 5.0 of the Advanced Configuration and Power Interface (ACPI) brings most notably 64-bit ARM (ARMv8 / AArch64) support. There's additionally a new Collaborative Processor Performance Control (CPPC) extension, new device-specific data control support, and other improvements to the specification.
More details on ACPI 5.1 can be found via the UEFI Forum press release.
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