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xen-devel
Re: [Xen-devel] Accessing the hypervisor from VMs
On Wednesday 09 March 2005 21:17, Diwaker Gupta wrote:
> > You could add one or more hypercalls to do this. Alternatively, you can
> > put the information you want to pass up into a shared memory page so that
> > dom0 can read it directly.
> >
> > > Is it possible to access the hypervisor through a VM other than dom0?
>
> Sure, I can do all this from dom0, but I want to be able to do it from
> guests other than dom0 -- how does that work?
You could add a new type of hypercall that is available to any dom and returns
the data you require. For starters, take a look at the hypercall table in
xen/arch/x86/x86_32/entry.S
All you need to do to make it work with unpriv domains is to not check the
domains privileges ;-)
Setting up Xen <-> domU shared memory would be a bit more involved.
Cheers,
Mark
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