Re: Disaggregated (Xoar) Dom0 Building

[Lonnie Cumberland <lonnie@xxxxxxxxxxx>]

    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
>       
>