DL360p gen 8 reboots on boot

[cirr%sdf.org@localhost]

Hello, I'm attempting to get Xen running on an HP DL360p gen 8 and am
using configurations based on several successful supermicro instances.

* NetBSD-9.2
* xentools-4.11
* xenkernel-4.15 (tried xenkernel-4.11 and xenkernel-4.13 as well)

Processor Options are:

* No-Execute Memory Protection - disabled
* Intel(R) Virtualization Technology - enabled
* Intel(R) Hyperthreading Options - (tried both enabled and disabled)

First issue was "Heap Full" which was improved by uncompressing
netbsd-XEN3_DOM0.gz and updating /boot.cfg based on a previous post to the
list.

That resulted in the system booting, but then almost immediately rebooting.

Second issue was warnings about L1TF-vulnerable hardware with
SMT/Hyperthreading enabled.  Added 'smt=1' to /boot.cfg in the multiboot
section for the 'xen.gz' kernel.

The system boots up to no errors, with the last portion being in regard to
VIRTUAL MEMORY ARRANGEMENT and finally '(XEN) Dom0 has maximum 1VCPU(s)'
which is what is set in boot.cfg.  However, it then immediately reboots
after:

(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Scrubbing Free RAM on 1 nodes using 6 CPUs
(XEN) .....


boot.cfg looks like this:

menu=Xen:load /netbsd-XEN3_DOM0;multiboot /xen.gz allow_unsafe=true
dom0_mem=1024M dom0_max_vcpus=1 dom0_vcpus_pin smt=1
menu=Boot normally:rndseed /var/db/entropy-file;boot netbsd
menu=Boot single user:rndseed /var/db/entropy-file;boot netbsd -s
menu=Disable ACPI:rndseed /var/db/entropy-file;boot netbsd -2
menu=Disable ACPI and SMP:rndseed /var/db/entropy-file;boot netbsd -12
menu=Drop to boot prompt:prompt