kernelconfig_penguin
depends
CONFIG_ACPI
CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE
CONFIG_BLK_DEV_INITRD

Allow upgrading ACPI tables via initrd

configname: CONFIG_ACPI_TABLE_UPGRADE

Linux Kernel Configuration
└─> Power management and ACPI options
└─> ACPI (Advanced Configuration and Power Interface) Support
└─> Allow upgrading ACPI tables via initrd

This option provides functionality to upgrade arbitrary ACPI tables
via initrd. No functional change if no ACPI tables are passed via
initrd, therefore it's safe to say Y.
See Documentation/acpi/initrd_table_override.txt for details