Sure, you could do that, but you'd still want to have a signature in
0x40SSSS00 to positively identify the chunk. And what if you wanted
more than 256 leaves?
"What hypervisor is this?" isn't a very interesting question; if you're
even asking it then it suggests that something has gone wrong. Its much
more useful to ask "what interfaces does this hypervisor support?", and
enumerating a smallish range of well-known leaves looking for signatures
is the simplest way to do that. (We could use signatures derived from
the PCI vendor IDs which would help with managing that namespace.)
J
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