GICv3: RWP timeout, gone fishing

[Joakim Tjernlund]

After a 1 cluster reset(got 2 clusters with 2 A53 cores in each, only one core runs Linux) I se a bunch of
  GICv3: RWP timeout, gone fishing
when linux is booting up and IRQs aren't working, the console hangs when starting user space.

The cluster reset is impl. in linux reboot code so everything should shut down properly
before the cluster reset.

kernel 5.15.26

What can could be the cause? Where do I even begin to look?
 
 Jocke