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| author | Rasmus Villemoes <rasmus.villemoes@prevas.dk> | 2020-11-20 11:45:36 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-01-16 14:49:09 -0500 |
| commit | c0364ce1c6957c5295e933b95802e6966e00b08f (patch) | |
| tree | 807348d08237642047a57d3c75b43b82c27d5ad8 | |
| parent | 31ce367cd10087b532431c023e4a95513ecdee5d (diff) | |
| download | u-boot-c0364ce1c6957c5295e933b95802e6966e00b08f.tar.gz | |
doc/README.gpt: define partition type GUID for U-Boot environment
When setting aside a GPT partition for holding the U-Boot environment,
having a partition type GUID [1] indicating "Linux filesystem" (as
most tools default to) is somewhat misleading - and there's no other
well-known type GUID that is better suited. So to have a canonical
value to put into the type field, define
3de21764-95bd-54bd-a5c3-4abe786f38a8
to mean a partition holding a U-Boot environment.
This is a v5 namespace-name GUID [2], generated [3] from a namespace
of "25cbcde0-8642-47c6-a298-1a3a57cd256b" and name "U-Boot
environment".
Should future type GUIDs be defined in the context of U-Boot, it's
sensible to use that same namespace GUID.
[1] https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
[2] https://en.wikipedia.org/wiki/Universally_unique_identifier#Versions_3_and_5_(namespace_name-based)
[3] https://www.uuidtools.com/v5
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
| -rw-r--r-- | doc/README.gpt | 2 | ||||
| -rw-r--r-- | include/part_efi.h | 3 | ||||
| -rw-r--r-- | lib/uuid.c | 3 |
3 files changed, 7 insertions, 1 deletions
diff --git a/doc/README.gpt b/doc/README.gpt index facd7afc3a..9e0d2221ef 100644 --- a/doc/README.gpt +++ b/doc/README.gpt @@ -267,6 +267,8 @@ Some strings can be also used at the place of known GUID : (0657FD6D-A4AB-43C4-84E5-0933C84B4F4F) "lvm" = PARTITION_LINUX_LVM_GUID (E6D6D379-F507-44C2-A23C-238F2A3DF928) + "u-boot-env" = PARTITION_U_BOOT_ENVIRONMENT + (3DE21764-95BD-54BD-A5C3-4ABE786F38A8) "uuid_disk=...;name=u-boot,size=60MiB,uuid=...; name=kernel,size=60MiB,uuid=...,type=linux;" diff --git a/include/part_efi.h b/include/part_efi.h index 1929e4400f..c68529b4da 100644 --- a/include/part_efi.h +++ b/include/part_efi.h @@ -56,6 +56,9 @@ #define PARTITION_LINUX_LVM_GUID \ EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) +#define PARTITION_U_BOOT_ENVIRONMENT \ + EFI_GUID( 0x3de21764, 0x95bd, 0x54bd, \ + 0xa5, 0xc3, 0x4a, 0xbe, 0x78, 0x6f, 0x38, 0xa8) /* linux/include/efi.h */ typedef u16 efi_char16_t; diff --git a/lib/uuid.c b/lib/uuid.c index 6cfb6cd449..54a93aacc9 100644 --- a/lib/uuid.c +++ b/lib/uuid.c @@ -96,7 +96,8 @@ static const struct { {"linux", PARTITION_LINUX_FILE_SYSTEM_DATA_GUID}, {"raid", PARTITION_LINUX_RAID_GUID}, {"swap", PARTITION_LINUX_SWAP_GUID}, - {"lvm", PARTITION_LINUX_LVM_GUID} + {"lvm", PARTITION_LINUX_LVM_GUID}, + {"u-boot-env", PARTITION_U_BOOT_ENVIRONMENT}, }; /* |