Re: Xen bootup: issue with Raspberry Pi 5?

[Paul Leiber <paul@xxxxxxxxxxxxxxxx>]

Hi Sumit,

Unfortunately, I don't have a direct answer to the question (as is so 
often the case, due to my limited knowledge and experience). However, I 
am successfully running Xen on a RPi 4 (mostly, except for some VLAN 
related networking issues).
I used instructions in [1] to install vanilla Debian on the RPi, 
including UEFI boot and grub. I then compiled Xen with expert options 
and ACPI enabled.
I don't know if there are better solutions. For example, I suffer from 
the fact that I2C doesn't work when using UEFI boot on a RPi. Nowadays, 
Debian provides their own vanilla Debian images for RPi and with working 
I2C, but these images are using a different boot method that I didn't 
know how to use with Xen.  So far, the procedure described above seems 
to be the easiest solution for me.
Best regards

Paul


[1] https://forums.raspberrypi.com/viewtopic.php?t=282839

Am 30.06.2025 um 12:35 schrieb Sumit Semwal:
> Hello,
>
> Good <time of the day>!
>
> I've just begun to experiment with the Raspberry Pi 5, trying to run a
> simple xen + Dom0 setup, using uBoot, and the bookworm based Rpi
> distro.
>
> I've tried combinations of the following setup:
>
> 1. prebuilt Rpi5 kernel + dtbs, and have also tried to build them from
> source [1]
> 2. Xen from upstream [2] and xen-troops [3]
> 3. upstream uBoot from [4]
>
> but with the same result: [short log below; I can provide a fuller log
> if needed]
>
> (XEN) DT: ** translation for device /axi/msi-controller@1000130000 **
> (XEN) DT: bus is default (na=2, ns=2) on /axi
> (XEN) DT: translating address:<3> 000000ff<3> fffff000<3>
> (XEN) DT: parent bus is default (na=2, ns=1) on /
> (XEN) DT: walking ranges...
> (XEN) DT: default map, cp=0, s=1000000000, da=fffffff000
> (XEN) DT: default map, cp=1000000000, s=100000000, da=fffffff000
> (XEN) DT: default map, cp=1400000000, s=400000000, da=fffffff000
> (XEN) DT: default map, cp=1800000000, s=400000000, da=fffffff000
> (XEN) DT: default map, cp=1c00000000, s=400000000, da=fffffff000
> (XEN) DT: not found !
> (XEN) Unable to retrieve address 1 for /axi/msi-controller@1000130000
> (XEN) Device tree generation failed (-22).
> (XEN) debugtrace_dump() global buffer starting
> 1 cpupool_create(pool=0,sched=6)
> 2 Created cpupool 0 with scheduler SMP Credit Scheduler rev2 (credit2)
> 3 cpupool_add_domain(dom=0,pool=0) n_dom 1 rc 0
> (XEN) wrap: 0
> (XEN) debugtrace_dump() global buffer finished
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Could not set up DOM0 guest OS (rc = -22)
> (XEN) ****************************************
>
>
> I'm certain I'm missing something, but before I delve deeper, I just
> wanted to ask if this is a known issue, and if so, are there any
> workarounds or solutions available for this?
>
> Any help about this is highly appreciated!
>
> Thanks and Best regards,
> Sumit.
>
> [1]:  https://github.com/raspberrypi/linux rpi-6.12.y branch
> [2]: git://xenbits.xen.org/xen.git - main branch
> [3] xen-troops https://github.com/xen-troops/xen - rpi5_dev branch
> [4]: https://github.com/u-boot/u-boot.git master branch