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Re: Disaggregated (Xoar) Dom0 Building
- To: Lonnie Cumberland <lonnie@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Thu, 27 Jun 2024 07:54:32 +0200
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- Delivery-date: Thu, 27 Jun 2024 05:54:56 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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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