Native Windows 11 on Duo S?

Duo
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I managed to port U-Boot 2025.01 with ACPI enabled to cv181x target, as well as made a custom DSDT (.asl ACPI table).

Don’t ask me why, I’m just having some fun ;D

That was enough to get Windows Boot Manager running and being able to control it over serial connection:

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I haven’t been able to go further (for now), but that’s a great start.

In case anyone for some random reason wants to repeat this, you can download this fip.bin and put it on an SD card’s boot partition after you’ve installed Windows on ARM on it (make sure to do that on MBR, not GPT), use bcdboot to create UEFI boot files.

If you want to access advanced boot options (the only thing that works!), use bcdedit command to enable it:
bcdedit /store R:\EFI\Microsoft\Boot\BCD /set {globalsettings} advancedoptions yes

In U-Boot over serial, you can use eficonfig to add Windows Boot Manager and make it first in boot order, then use bootefi bootmgr to actually boot, good luck.

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do you have your ported u-boot source code somewhere on git or similar?

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I quickly published the code, I’ll warn you that this code is definitely not production-ready or something, AI was used to help with porting, DSDT is not guaranteed to be fully correct, as well as the code has been modified since above fip-acpi.bin has been compiled, so it’s a little bit different (SPI/DTS were changed since then).

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