EBBR Notes 2026.01.14

Attendees

• Heinrich Schuchardt (Canonical)
• Ilias Apalodimas (Linaro)
• Vincent Stehlé (Arm)

Agenda

• Gather feedbacks on v2.4.0-pre1 and approve EBBR v2.4.0 (tentative)
• Pull request #155: chapter3-secureworld: correct RISC-V heading
• Pull request #157: Add version annotations

Notes

• EBBR v2.4.0 is not quite ready yet; pull #155 should go in, we can try to respin pull #157 but no guarantee it will reach consensus, and we are missing clarifications around the conformance profile GUIDs.

Raw notes

• Pull request #157: Add version annotations

  • Version annotations with in-line requirements following is not that nice. Forbid this format completely and use only "empty" annotations?
  • Useful, still.
  • -> Let's respin the formatting when we have a paragraph

• Pull request #155: chapter3-secureworld: correct RISC-V heading

  • -> approved for merge

• Gather feedbacks on v2.4.0-pre1 and approve EBBR v2.4.0 (tentative)

  • For release 2.4, clarify the changelog around RISC-V Platform specification reference change (now unused).

  • We could clarify about the conformance profile GUIDs; it would be nice if firmware could publish only one, but the OS might not be aware of more recent GUIDs.

    • Question arose twice this week it seems.

    • Recommend to publish all GUIDs supported. At least allow it explicitly.

    • -> Prepare a pull request

    • U-Boot has a single profile GUID at this point:

      config EFI_EBBR_2_1_CONFORMANCE
             bool "Add the EBBRv2.1 conformance entry to the ECPT table"
             depends on BOOTMETH_EFI_BOOTMGR
             depends on EFI_ECPT
             depends on EFI_LOADER_HII
             depends on EFI_RISCV_BOOT_PROTOCOL || !RISCV
             depends on EFI_RNG_PROTOCOL || !DM_RNG
             depends on EFI_UNICODE_COLLATION_PROTOCOL2
             default y
             help
               Enabling this option adds the EBBRv2.1 conformance entry to the ECPT UEFI table.

    • Who is actually using the GUIDs?

      • Arm wants to use it for testing at least.
      • Virtualbox mentions the GUIDs.
      • EDK II has it, too.

  • Otherwise, changelog looks fine.

Links

• https://github.com/ARM-software/ebbr/releases/tag/v2.4.0-pre1
• https://github.com/ARM-software/ebbr/pull/155
• https://github.com/ARM-software/ebbr/pull/157
• https://www.virtualbox.org/svn/vbox/trunk/src/VBox/Devices/EFI/Firmware/MdePkg/MdePkg.dec
• https://www.mail-archive.com/devel@edk2.groups.io/msg73589.html