Re: [Xen-devel] Boot dom0 and mini-OS guest in parallel

[Christopher Clark <christopher.w.clark@xxxxxxxxx>]

It's not implemented now, as far as I can tell from a quick scan of
the unstable source, but it's doable if you're up for a project.

Xen does relocation of modules passed at boot which is how the dom0
kernel and its initrd are loaded.

You could specify another module to grub that Xen will relocate and
then construct a domain around it within Xen, in a similar fashion to
the way dom0 is constructed.

See the dom0 construction code in:

xen/arch/x86/domain_build.c : construct_dom0
and
xen/arch/x86/setup.c : __start_xen

I'm not familar enough with ia64 to pass similar pointers there, and
I'm not sure what it'd take to build a neat enough implementation that
it'd be considered for merge.

Christopher


On Mon, Jul 6, 2009 at 1:40 PM, Lucio Maciel<luciofm@xxxxxxxxx> wrote:
> Hi,
>
> I'm using xen virtualization, and I writing a very security sensitive
> software that I want to run completely isolated, running it on a
> mini-OS or a very small/tight Linux guest.
>
> That's OK, but I also want it to boot in parallel with dom0, directly
> from the xen hypervisor, avoiding the need to first boot the dom0 and
> then boot my small self-contained guest.
>
> Is that possible? Or what should I know before trying to add this
> functionality to the xen hypervisor?
>
> Thanks in advance,
> Lúcio Maciel
> luciofm@xxxxxxxxx
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>

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