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by Sintendo 3466 days ago
I thought so too at first, but I'd expect non-x86 host systems running x86 guests to be vulnerable if that were the case. The advisory seems to indicate otherwise.

Anyway, I've done some digging and found an explanation here: https://insinuator.net/2015/02/the-dangers-of-x86-emulation-...

tl;dr: it falls back to emulation for very specific cases that cannot be handled by hardware-assisted virtualization