[PATCH v8 0/2] Improve disk image detection in efi_bootmgr

[Javier Tia]

Enhances the process for identifying disk images within the EFI boot
manager. Utilize part_driver_lookup_type() to verify the validity of a
downloaded file as a disk image, rather than depending on file
extensions.

part_driver_lookup_type() is now used in the prepare_loaded_image()
function in the EFI boot manager to detect partitions on a block device
created from a downloaded image. This allows the boot manager to boot
from any disk image that can be recognized by a partition driver, not
just ISO and IMG images.

Update prepare_loaded_image() to create the ramdisk block device
internally, obtain the blk_desc and use part_driver_lookup_type() to
detect a valid partition table.

In try_load_from_uri_path(), try prepare_loaded_image() first to detect
disk images, and fall back to PE-COFF detection only if that fails.

Include part.h in the EFI loader and export part_driver_lookup_type and
add its prototype and documentation in include/part.h. This makes the
partition-driver lookup available to other code paths that need to
detect partition tables on a block descriptor.

---
Changes in v8:
- Cleanup part_driver_lookup_type history after being removed and added
  again.
- Passing CI: https://github.com/u-boot/u-boot/pull/816

- v7 link: https://lore.kernel.org/u-boot/20250925224838.567562-1-javier.tia@linaro.org/
- v6 link: https://lore.kernel.org/u-boot/20250924233120.454116-1-javier.tia@linaro.org/
- v5 link: https://lore.kernel.org/u-boot/20250905172330.135550-1-javier.tia@linaro.org/
- v4 link: https://lore.kernel.org/u-boot/20250903214417.431985-1-javier.tia@linaro.org/
- v3 link: https://lore.kernel.org/u-boot/20250829155415.90634-1-javier.tia@linaro.org/
- v2 link: https://lore.kernel.org/u-boot/20250808213627.649669-1-javier.tia@linaro.org/
- v1 link: https://lore.kernel.org/u-boot/20250805162158.117876-1-javier.tia@linaro.org/

Signed-off-by: Javier Tia <javier.tia at linaro.org>

---
Javier Tia (2):
      part: Export part_driver_lookup_type for external use
      efi_loader: Improve disk image detection in efi_bootmgr

 disk/part.c                  | 18 +---------------
 include/part.h               | 21 +++++++++++++++++++
 lib/efi_loader/efi_bootmgr.c | 49 +++++++++++++++++++++++++++++++-------------
 3 files changed, 57 insertions(+), 31 deletions(-)
---
base-commit: 0ee639ff5af33342c6c2f4579e210d707abc9bc2
change-id: 20251008-detect_disk_image_type-4f04a2a8d989

Best regards,
-- 
Javier Tia <javier.tia at linaro.org>