3 ms·

You'll have EL2 on Snapdragon X Elite. If it's using the design that I prototyped while at Qualcomm, it's jumping to EL2 at ExitBootServices when the boot to L

by my123 2y ago

You'll have EL2 on Snapdragon X Elite. If it's using the design that I prototyped while at Qualcomm, it's jumping to EL2 at ExitBootServices when the boot to Linux at EL2 option is enabled. Didn't look at a release firmware yet to see what was the final impl, but was told that it did ship :)

sidkshatriya 2y ago
The boot flow diagram on the article indicates the user gets dropped off into EL1 and not EL2, sadly though. The article is from Qualcomm so I would assume this the current official situation.
- my123 2y ago
  Out of the box that's true. The system firmware will ship with 3 boot modes selectable via the setup interface: - Windows (this one has the Windows tcblauncher escalated to EL2 through Secure Launch) - Linux (this one stays at EL1) - Linux w/ KVM (which jumps to EL2 before kernel handover)
  - sidkshatriya 2y ago
    This would be wonderful. However one would need to verify when these laptops actually start shipping. Let’s hope for the best !
  - moondev 2y ago
    Is this a "arm system ready " uefi firmware? Curious if you tested ESXi for aarch64 edition.
    - my123 2y ago
      Arm SystemReady SR/ES assumes sane ACPI tables. That's something that Snapdragon X (1st-gen) very much doesn't have. The ACPI tables present there are pretty much only usable for Windows if you want full functionality. Yeah ESXi-Arm is bootable, but a number of patches were required.