Hang booting Dom0: nvme timeout, completion polled

[Jan Kellermann <jan.kellermann@xxxxxxxxx>]

Hi,

we are working with Ubuntu 22.04 (Ubuntu Kernel 5.15.0-67) and xen 4.16 
(latest commit from stable) and cannot not boot into dom0 on a new 
server. The NVMEs are in software raid 1.
With same kernel without xen we can boot the server without problems.

The host is hanging on:
nvme nvme0: I/O 0 QID 0 timeout, completion polled
nvme nvme1: I/O 8 QID 0 timeout, completion polled

Some specs:

Motherboard:
      description: Motherboard
       product: Pro WS 565-ACE
       vendor: ASUSTeK COMPUTER INC.
       physical id: 0
       version: Rev X.0x
       serial: 221112256701775
       slot: Default string
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: 9901
          date: 10/13/2022
          size: 64KiB
          capacity: 16MiB
          capabilities: pci apm upgrade shadowing cdboot bootselect 
socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 
int5printscreen int9keyboard int14serial int17printer acpi usb 
biosbootspecification uefi

PCI / NVME:
        *-pci:1
             description: PCI bridge
             product: Starship/Matisse GPP Bridge
             vendor: Advanced Micro Devices, Inc. [AMD]
             physical id: 3.1
             bus info: pci@0000:00:03.1
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm pciexpress msi ht normal_decode 
bus_master cap_list
             configuration: driver=pcieport
             resources: irq:27 memory:fc900000-fc9fffff
           *-nvme
                description: NVMe device
                product: SAMSUNG MZQL23T8HCLS-00A07
                vendor: Samsung Electronics Co Ltd
                physical id: 0
                bus info: pci@0000:08:00.0
                logical name: /dev/nvme0
                version: GDC5802Q
                serial: S64HNJ0T643797
                width: 64 bits
                clock: 33MHz
                capabilities: nvme pm msi pciexpress msix nvm_express 
bus_master cap_list rom
                configuration: driver=nvme latency=0 
nqn=nqn.1994-11.com.samsung:nvme:PM9A3:2.5-inch:S64HNJ0T643797 state=live
                resources: irq:41 memory:fc910000-fc913fff 
memory:fc900000-fc90ffff
Can anyone give hints for solving this problem?

Best regards and thank you in advance,
Jan Kellermann