Does Xen dom0 count as a VM?

[Jim Fehlig]

On 7/19/23 09:50, Daniel P. Berrangé wrote:
> On Wed, Jul 19, 2023 at 10:12:07AM +0000, Sergio Gelato wrote:
>> Does this project share the view expressed in
>> https://github.com/systemd/systemd/issues/28113#issuecomment-1621986461
>> that "when it comes to systemd's PoV xen dom0 is not a VM. i.e. the VM
>> that owns the hardware is not a VM in our eyes"?
> 
> That is correct. Domain 0 in a Xen-like hypervisor is special, it
> is the equivalent of the Lnux host OS in KVM world and clearly
> should not be considered a VM.

The libvirt libxl driver shows 'Domain-0' in the output of 'virsh list' and does 
allow some operations like changing vcpu count and memory ballooning, but most 
operations like shutdown, reboot, save, migrate, etc are obviously not supported.

Regards,
Jim