I just tried again with two logical CPUs and the core set to "Westmere"
(I think that was the default), and didn't see the bug. So this seems
related specifically to "[x] Copy host CPU configuration" being checked.
Here's the /proc/cpuinfo from the "virtual Westmere" where it works:
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1524069
Title:
Xenial KVM: updating Trusty guest from 3.13.0-68 to
