diff options
Diffstat (limited to 'Documentation/filesystems/efivarfs.txt')
| -rw-r--r-- | Documentation/filesystems/efivarfs.txt | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/Documentation/filesystems/efivarfs.txt b/Documentation/filesystems/efivarfs.txt deleted file mode 100644 index 686a64bba775..000000000000 --- a/Documentation/filesystems/efivarfs.txt +++ /dev/null @@ -1,23 +0,0 @@ - -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 - -Due to the presence of numerous firmware bugs where removing non-standard -UEFI variables causes the system firmware to fail to POST, efivarfs -files that are not well-known standardized variables are created -as immutable files. This doesn't prevent removal - "chattr -i" will work - -but it does prevent this kind of failure from being accomplished -accidentally. |