(In reply to Takashi Iwai from comment #8) > Created attachment 875916 [details] > dmesg from the v2 patched 6.9.7 kernel Thanks, this is making things much more clear. Seems as if the kernel is trying to map part of the MSI space (physical address range 0xfee00000 - 0xfeeff000). When running as dom0 this should not happen, as the hypervisor is owning this region and will deny mapping it. Seems as if the ucsi driver needs to be made Xen aware.