EBBR Notes 2023.06.05 - ARM-software/ebbr GitHub Wiki

Attendees

  • Etienne Carrière (STMicroelectronics)
  • Ahmad Fatoum (Pengutronix)
  • Vincent Stehlé (Arm)

Agenda

  • Continue reviewing pull request #106: Recommend usage of partition type GUIDs to find firmware (Heinrich)
  • Issues scrub?

Notes

  • Heinrich excused, updated pull request #106.
    • Pull request has been rebased.
  • Discussed part type GUID, partition GUID and filesystem GUID.
  • Discussed what it would take to help building a unique image containing boot firmware, booting on multiple SoCs. Often conflict with each others. Part type GUID, size limit.
  • Etienne: FIP partitions have a GUID per SoC "family" (ex: STM32MP1). FIP contains all BL3*. BL2 different while same BL3* for example.
  • Ahmad: eMMC boot partition solves the problem.
    • Could mention in the pull request.
  • ESP FAT filesystem seen as a weakness during capsule update when we have a power cut.
    • Are we actually requiring FAT de-facto? Could we recommend ext instead?
    • Same problem when updating the UEFI Variables when the are stored in e.g. ubootefi.var.
    • GRUB has its fs implementations, but systemd-boot going toward "more ESP" for boot.
    • Another way: pstore to contain UEFI variables.
  • Next call will be on Sep 11.

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