[Bug 295077] ThunderX lost all NICs on PCI after upgrade from 13.5-RELEASE-p14 to 15.0-RELEASE-p8

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295077

            Bug ID: 295077
           Summary: ThunderX lost all NICs on PCI after upgrade from
                    13.5-RELEASE-p14 to 15.0-RELEASE-p8
           Product: Base System
           Version: 15.0-RELEASE
          Hardware: arm64
                OS: Any
            Status: New
          Keywords: ThunderX
          Severity: Affects Only Me
          Priority: ---
         Component: arm
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 270482
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=270482&action=edit
/boot/loader.conf, dmesg.boot, pciconf -l

Hi freebsd-arm@,

we were upgrading ThunderX systems from 13.5-RELEASE-p14 to 15.0-RELEASE-p8 via
freebsd-upgrade.

On 13.5-RELEASE-p14 vnicpf0 (with iovctl) was configured and the 40G interface
in use. A dual port NIC (igb0/igb1) is sitting in the PCIe port and worked as
well. 

After upgrading and booting into 15.0-RELEASE-p8, both NICs do not show up
anymore. It _seems_ as if the drivers do not attach to the devices, because the
PCI bus itself is not initialized as expected (see the attached dmesg.boot).

The ThunderX systems are those the initial armv8 development has been done on
(Gigabyte R120-T33).

I attached dmesg.boot, pciconf -l and loader.conf for a start. Any help is very
much appreciated.

Thanks!

Frank

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