Qubes OS 4.1 under the Heads

[Norbert Kaminski <norbert.kaminski@xxxxxxxxx>]

Hi all,

I'm trying to boot Qubes 4.1 under the Heads (http://osresearch.net/).
The Heads uses kexec to run the Xen 4.13 with Qubes kernel. During the
boot process on the screen appear colorful artifacts, which are shown in
this issue:

https://github.com/osresearch/heads/issues/789

The installation media booted properly when I replaced the hypervisor to
the stable-4.11. So I've bisected Xen from the 4.11 to 4.13 version and
I found out that problems start with:

https://github.com/xen-project/xen/commit/dcf4179

This is the first commit where Qubes OS doesn't boot properly. The Qubes
kernel cannot find the LUKS UUID and boot ends in the emergency mode.
The colorful artifacts appear in this commit:

https://github.com/xen-project/xen/commit/07c181c

Here is the dump of the DMAR table:

DMAR @ 0x0000000000000000
  0000: 44 4D 41 52 A8 00 00 00 01 E8 43 4F 52 45 20 20 DMAR......CORE
  0010: 43 4F 52 45 42 4F 4F 54 00 00 00 00 43 4F 52 45 COREBOOT....CORE
  0020: 00 00 00 00 23 01 00 00 00 00 00 00 00 00 00 00 ....#...........
  0030: 00 00 20 00 00 00 00 00 00 00 D9 FE 00 00 00 00 .. .............
  0040: 01 08 00 00 00 00 02 00 01 08 00 00 00 00 02 01 ................
  0050: 00 00 58 00 01 00 00 00 00 10 D9 FE 00 00 00 00 ..X.............
  0060: 03 08 00 00 02 FA 1F 00 04 08 00 00 00 FA 0F 00 ................
  0070: 04 08 00 00 00 FA 0F 01 04 08 00 00 00 FA 0F 02 ................
  0080: 04 08 00 00 00 FA 0F 03 04 08 00 00 00 FA 0F 04 ................
  0090: 04 08 00 00 00 FA 0F 05 04 08 00 00 00 FA 0F 06 ................
  00A0: 04 08 00 00 00 FA 0F 07                         ........

I wasn't able to dump the Xen dmesg due to a mismatch between
xen-tools (4.13) and hypervisor (4.12).

I'd appreciate any help on this subject.

---
Best Regards,
Norbert Kamiński
Embedded Systems Engineer
GPG key ID: 9E9F90AFE10F466A
3mdeb.com