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| author | Matthew Garrett <mjg@redhat.com> | 2012-10-05 13:54:56 +0800 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2012-10-30 10:39:16 +0000 |
| commit | 5d9db883761ad1bc2245fd3018715549b974203d (patch) | |
| tree | f014ebfff596b735ad9b7628035cf830be632ff0 /include/linux/efi.h | |
| parent | ddffeb8c4d0331609ef2581d84de4d763607bd37 (diff) | |
| download | linux-5d9db883761ad1bc2245fd3018715549b974203d.tar.gz linux-5d9db883761ad1bc2245fd3018715549b974203d.tar.bz2 linux-5d9db883761ad1bc2245fd3018715549b974203d.zip | |
efi: Add support for a UEFI variable filesystem
The existing EFI variables code only supports 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. So,
instead, let's add a filesystem. Variables can be read, written and
created, with the first 4 bytes of each variable representing its UEFI
attributes. The create() method doesn't actually commit to flash since
zero-length variables can't exist per-spec.
Updates from Jeremy Kerr <jeremy.kerr@canonical.com>.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'include/linux/efi.h')
| -rw-r--r-- | include/linux/efi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h index 8670eb1eb8cd..b2af1571592b 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -29,7 +29,12 @@ #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) +#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) +#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) +#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) +#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) +#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) typedef unsigned long efi_status_t; typedef u8 efi_bool_t; |