Thomas Gleixner wrote:
> Once you are there, you are near the point where you created a virtual
> architecture, which could run on any real architecture which gets
> supported by a hypervisor backend.
>
> I'd love that :)
>
Sure. But not even hypervisors. Once we sort out pv_ops's SMP support,
it will be this >< close to covering everything in the subarch
interface. So we can drop all that goo in favour of paravirt_ops, and
make a single kernel that will boot on everything from voyager to
numa-q! How's that for world peace?
> I know it is tricky to combine this with the upcoming hardware
> virtualization support. But it's at least a worthwhile thought
> experiment.
>
Well, in many ways that's a step backwards. The upside is that its
easier to get away with simply emulating the some particular piece
hardware, but it does lose a lot of opportunities for interesting
flexibility and optimisations.
But I anticipate we'll get a xen-hvm pv_ops backend, for running under
Xen with a virtualizing cpu. It will probably look a lot like kvm's
pv_ops backend.
J
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