Public bug reported:
On a machine with multiple processors, different steppings may have
different cpu features. So when the 'host cpu configuration' is copied,
required cpu features may not be supported on the other cpu's cores.
On the test machine, dual Intel Xeon E5420s have steppings 6 and 10.
Stepping 6 does not support 'xsave' (/proc/cpuinfo attached).
Perhaps the host cpu configuration should be per-physical id and vcpus
pinned to their respective host?
** Affects: virt-manager (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "/proc/cpuinfo"
https://bugs.launchpad.net/bugs/1093292/+attachment/3466533/+files/cpuinfo
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https://bugs.launchpad.net/bugs/1093292
Title:
vm won't start if host cpus are different steppings
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