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Re: [Xen-devel] [PATCH v2 00/21] dom0less step1: boot multiple domains from device tree

On Mon, 23 Jul 2018, Andrii Anisov wrote:
> Hello Stefano,
> On 07.07.18 02:11, Stefano Stabellini wrote:
> > The device tree based boot protocol is extended to carry information
> > about DomUs. Based on that information, Xen creates and starts one or
> > more DomUs.
> Please consider also status monitoring and restarting for those domains.

It is possible to monitor these domains from Dom0. It is not possible to
restart them at the moment. However, with the appropriate configuration
in Dom0, it would certainly be possible to shutdown the domains started
at boot, and create them anew with xl. Of course to do that, the xl
configurations and related files in dom0 would have to be provided.

> >   DomUs created this way don't have access to xenstore for the
> > moment. This is actually OK, because this is meant for mission critical
> > applications that typically only access directly assigned devices. They
> > cannot tolerate interference or increased IRQ latency due to PV
> > protocols.
> But even a mission critical application does exchange some information with
> other entities in the system. So they would need interdomain communication
> anyway (i.e. built with event channels and shared pages, etc.)

It is on my todo list.

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