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Tip revision: 4ef7675344d687a0ef5b0d7c0cee12da005870c0 authored by Linus Torvalds on 21 December 2015, 00:06:09 UTC
Linux 4.4-rc6
Tip revision: 4ef7675
efivarfs.txt

efivarfs - a (U)EFI variable filesystem

The efivarfs filesystem was created to address the shortcomings of
using entries in sysfs to maintain EFI variables. The old sysfs EFI
variables code only supported variables of up to 1024 bytes. This
limitation existed in version 0.99 of the EFI specification, but was
removed before any full releases. Since variables can now be larger
than a single page, sysfs isn't the best interface for this.

Variables can be created, deleted and modified with the efivarfs
filesystem.

efivarfs is typically mounted like this,

	mount -t efivarfs none /sys/firmware/efi/efivars
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