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Re: Disaggregated (Xoar) Dom0 Building
- To: Juergen Gross <jgross@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Lonnie Cumberland <lonnie@xxxxxxxxxxx>
- Date: Thu, 27 Jun 2024 05:33:44 -0400
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- Delivery-date: Thu, 27 Jun 2024 09:34:25 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Thanks for your
suggestions and information as I will definitely look into these
more.
I have a very brief introduction to Dom0less and it is definitely
something of interest for me to review as well.
On the QubesOS side, I also read up a little on it and while it
has a number of similarities to what I am trying to do on the
functional side, it seems to be a whole distro release that comes
in a 6GB ISO download to install where as the project I am working
towards is to have everything as a RAM-based ultra-lightweight
thin hypervisor. I looked over ACRN, the NOVA Microhypervisor
(Headron, Beadrock Udo), Rust-Shyper, Bareflank-MicroV, and many
other development efforts but it seems that Xen is the most
advanced for my purposes here.
Thanks again and I will dig into everything much more as well.
Have a great day,
Lonnie
On 6/27/2024 1:54 AM, Juergen Gross
wrote:
On
26.06.24 18:47, Lonnie Cumberland wrote:
Hello All,
I hope that everyone is doing well today.
Currently, I am investigating and researching the ideas of
"Disaggregating" Dom0 and have the Xoar Xen patches ("Breaking
Up is Hard to Do: Security and Functionality in a Commodity
Hypervisor" 2011) available which were developed against version
22155 of xen-unstable. The Linux patches are against Linux with
pvops 2.6.31.13 and developed on a standard Ubuntu 10.04
install. My effort would also be up update these patches.
I have been able to locate the Xen "Dom0 Disaggregation"
(https://wiki.xenproject.org/wiki/Dom0_Disaggregation) am
reading up on things now but wanted to ask the developers list
about any experience you may have had in this area since the
research objective is to integrate Xoar with the latest Xen
4.20, if possible, and to take it further to basically eliminate
Dom0 all together with individual Mini-OS or Unikernel "Service
and Driver VM's" instead that are loaded at UEFI boot time.
Any guidance, thoughts, or ideas would be greatly appreciated,
Just some pointers, this is not an exhaustive list:
- you should have a look at dom0less (see
docs/features/dom0less.pandoc in
the Xen source tree) and hyperlauch (see
docs/designs/launch/hyperlaunch.rst
in the Xen source tree)
- Xenstore in a stub-domain is working fine, it is the default in
openSUSE and
SLE
- QubesOS has a lot of the disaggregation you are looking for
implemented
- I'm pretty sure only very few changes should be needed for the
Linux kernel,
if any.
Juergen
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