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xen-devel
Re: [Xen-devel] Xen inside Xen with VMX?
On Thu, 2008-01-31 at 07:07 -0500, Ben Guthro wrote:
> Current VT implementations do not have this ability, AFAIK.
Indeed. There's only one root mode, and the processor has no concept of
recursively stacking roots and accompanying protection levels on top of
each other.
Nonetheless, root mode could be emulated, i.e. via shadow VMCBs,
optional shadow NPTs and emulation of the respective instruction subset.
Would suffer from the same (most probably solvable) problems regarding
privilege compression and the like, but probably an interesting
excercise.
Maybe one should put it on some (nonexisting) list for interesting
[academic] projects.
regards,
daniel
--
Daniel Stodden
LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München D-85748 Garching
http://www.lrr.in.tum.de/~stodden mailto:stodden@xxxxxxxxxx
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B
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