diff mbox series

[v2,1/7] lib: uuid: add partition type GUID for extended bootloader

Message ID 20260404152640.3297713-2-dario.binacchi@amarulasolutions.com
State New
Headers
Series Support metadata-driven A/B boot for STM32MP25 |

Commit Message

Dario Binacchi April 4, 2026, 3:23 p.m. UTC 
The Extended Boot Loader Partition (XBOOTLDR) is a standard defined by
the Discoverable Partitions Specification (DPS) to host boot loader
resources outside of the EFI System Partition ([1], [2]).

Defining this GUID (bc13c2ff-59e6-4262-a352-b275fd6f7172) allows U-Boot
to correctly identify and label these partitions using the "xbootldr"
shorthand.

[1] https://uapi-group.org/specifications/specs/discoverable_partitions_specification/#extended-boot-loader-partition:~:text=UEFI%20Specification.-,Extended%20Boot%20Loader%20Partition,-bc13c2ff%2D59e6%2D4262
[2] https://uapi-group.org/specifications/specs/boot_loader_specification/
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

Changes in v2:
- Add links to the XBOOTLDR specification in the commit message
- Add Reviewed-by tag of Simon Glass

 doc/README.gpt     | 2 ++
 include/part_efi.h | 3 +++
 lib/uuid.c         | 1 +
 3 files changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/doc/README.gpt b/doc/README.gpt
index 386ac2e0fc8f..a6e1fd7ce8d4 100644
--- a/doc/README.gpt
+++ b/doc/README.gpt
@@ -286,6 +286,8 @@  Some strings can be also used at the place of known GUID :
 	                    (E6D6D379-F507-44C2-A23C-238F2A3DF928)
 	"u-boot-env"      = PARTITION_U_BOOT_ENVIRONMENT
 	                    (3DE21764-95BD-54BD-A5C3-4ABE786F38A8)
+	"xbootldr"        = PARTITION_XBOOTLDR
+	                    (BC13C2FF-59E6-4262-A352-B275FD6F7172)
 
     "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 fb402df6f13e..afb21569c932 100644
--- a/include/part_efi.h
+++ b/include/part_efi.h
@@ -59,6 +59,9 @@ 
 #define PARTITION_U_BOOT_ENVIRONMENT \
 	EFI_GUID( 0x3de21764, 0x95bd, 0x54bd, \
 		0xa5, 0xc3, 0x4a, 0xbe, 0x78, 0x6f, 0x38, 0xa8)
+#define PARTITION_XBOOTLDR \
+	EFI_GUID( 0xbc13c2ff, 0x59e6, 0x4262, \
+		0xa3, 0x52, 0xb2, 0x75, 0xfd, 0x6f, 0x71, 0x72)
 
 /* Special ChromiumOS things */
 #define PARTITION_CROS_KERNEL \
diff --git a/lib/uuid.c b/lib/uuid.c
index 0a166320e077..cf5f8be48a32 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -86,6 +86,7 @@  static const struct {
 	{"swap",	NULL,	PARTITION_LINUX_SWAP_GUID},
 	{"lvm",		NULL,	PARTITION_LINUX_LVM_GUID},
 	{"u-boot-env",	NULL,	PARTITION_U_BOOT_ENVIRONMENT},
+	{"xbootldr",	NULL,	PARTITION_XBOOTLDR},
 	{"cros-kern",	NULL,	PARTITION_CROS_KERNEL},
 	{"cros-root",	NULL,	PARTITION_CROS_ROOT},
 	{"cros-fw",	NULL,	PARTITION_CROS_FIRMWARE},