grub: acpi
16.3.2 acpi
-----------
-- Command: acpi [-1|-2] [--exclude=table1,...|--load-only=table1,...]
[--oemid=id] [--oemtable=table] [--oemtablerev=rev]
[--oemtablecreator=creator] [--oemtablecreatorrev=rev]
[--no-ebda] filename ...
Modern BIOS systems normally implement the Advanced Configuration
and Power Interface (ACPI), and define various tables that describe
the interface between an ACPI-compliant operating system and the
firmware. In some cases, the tables provided by default only work
well with certain operating systems, and it may be necessary to
replace some of them.
Normally, this command will replace the Root System Description
Pointer (RSDP) in the Extended BIOS Data Area to point to the new
tables. If the '--no-ebda' option is used, the new tables will be
known only to GRUB, but may be used by GRUB's EFI emulation.
Note: The command is not allowed when lockdown is enforced (⇒
Lockdown). Otherwise an attacker can instruct the GRUB to load
an SSDT table to overwrite the kernel lockdown configuration and
later load and execute unsigned code.
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