[eigenform]

Probably because it's very likely that both AMD and Intel have had engineers working on this sort of thing for a long time, and they're now deciding to collectively hash out whatever the solution is going to be for both of them.

[zdw]

Better to have this than two sets of instruction, as is currently the case for virtualization entry/exit points on amd64 platforms.

[DannyBee]

A lot of this sort of thing come from AMD/Intel clients, rather than internally.

In this particular case, it definitely does :)