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Re: A question about Dom0.

Is Dom0 part of the Xen hypervisor or is the OS?

On Tue, Jul 20, 2021 at 7:29 PM, Pierre-Philipp Braun
<pbraun@xxxxxxxxxxxx> wrote:
> When Dom0 is kind of a VM, then Xen Hypervisor running in a VM???

XEN is the hypervisor, some kind of micro-kernel, which boots first
(type I hypervisor).  Then comes the dom0 kernel, be it Linux or NetBSD.
  XEN tools are the userland utilities to control the hypervisor from
within the dom0.  Yes, the "control domain" or the "service console", as
VMware used to call it at some time, is indeed some kind of a VM, but it
has access to network and disk devices, to then share those to the
unprivileged guests (domU).

When you setup a bootloader manually (ideally MULTIBOOT2 capable), it
becomes perfectly clear.  Try to have a look at your boot-loader setup,
you will see something gets loaded before the main system kernel.

Pierre-Philipp Braun
SMTP Health Campaign: enforce STARTTLS and verify MX certificates



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