[PATCH v3 0/5] Add partition type GUID support for environment

[Sumit Garg]

On Sun, Apr 19, 2026 at 03:54:02PM +0530, Balaji Selvanathan wrote:
> This series adds support for locating partitions using GPT partition
> type GUID instead of unique partition UUID. This enables the saveenv
> command to work with partitions identified by their type rather than
> unique identifiers, providing flexibility for systems where partition
> UUIDs may vary across devices but types remain constant.

Why don't we rather rely on partition name/label instead? That can be
common across platforms too. I would rather prefer a config fragment for
eg. UFS based environment or eMMC based environment and so on.

-Sumit

> 
> Patch 1 adds part_get_info_by_type_guid() function support
> Patch 2 adds scsi_get_blk_by_type_guid() function support
> Patch 3 adds support for partition type GUID based environment
> Patch 4 enables partition type GUID configs for QCM6490 and QCS615
> Patch 5 adds unit test for the partition type GUID lookup functionality
> 
> Signed-off-by: Balaji Selvanathan <balaji.selvanathan at oss.qualcomm.com>
> ---
> Changes in v3:
> - Addressed minor corrections in Patch 1 in part_get_info_by_type_guid function
> - Refactor env_scsi_get_part and env_scsi_load functions based
>   on the choice configs in Patch 3
> - Add unit test for the partition type GUID lookup functionality in Patch 5
> - Link to v2: https://lore.kernel.org/u-boot/20260109070912.4106466-1-balaji.selvanathan@oss.qualcomm.com/
> 
> Changes in v2:
> - Compute blk_find_max_devnum(UCLASS_SCSI) only once in scsi_get_blk_by_type_guid()
> - Introduce a Kconfig choice config to select between UUID-based
> and type GUID-based partition lookup methods.
> - Enable above new config in qcom_qcs615_defconfig and qcm6490_defconfig
> - Link to v1: https://lore.kernel.org/u-boot/20260108064947.3237361-1-balaji.selvanathan@oss.qualcomm.com/
> 
> ---
> Balaji Selvanathan (5):
>       disk: Add partition lookup by type GUID functionality
>       scsi: Add partition lookup by type GUID for SCSI devices
>       env: scsi: Add support for partition type GUID based environment
>       configs: Enable partition type GUID for QCM6490 and QCS615 boards
>       test: dm: Add partition type GUID lookup test
> 
>  configs/qcm6490_defconfig     |  5 +++++
>  configs/qcom_qcs615_defconfig |  5 +++++
>  disk/part.c                   | 37 +++++++++++++++++++++++++++++++
>  drivers/scsi/scsi-uclass.c    | 28 ++++++++++++++++++++++--
>  env/Kconfig                   | 51 ++++++++++++++++++++++++++++++++++++-------
>  env/scsi.c                    | 45 +++++++++++++++++++++++---------------
>  include/part.h                | 21 ++++++++++++++++++
>  include/scsi.h                | 11 ++++++++++
>  test/dm/part.c                | 48 ++++++++++++++++++++++++++++++++++++++++
>  9 files changed, 223 insertions(+), 28 deletions(-)
> ---
> base-commit: e3405917a1806971d9e72a94186b299f05581e1a
> change-id: 20260419-type-c6a48a1c273d
> 
> Best regards,
> -- 
> Balaji Selvanathan <balaji.selvanathan at oss.qualcomm.com>
>