[one-users] How use all cpu flags with KVM (-cpu host)

Paulo A L Rego pauloalr.alu at gmail.com
Fri Sep 9 07:42:19 PDT 2011


Using *cat /proc/cpuinfo* on KVM virtual machines, appears the following
result for model name: QEMU Virtual CPU.

It is possible to use the argument *-cpu host* to force KVM using all cpu
flags [1]
Then, using *cat /proc/cpuinfo* appears the real cpu: Intel(R) Core(TM) i7
CPU 930  @ 2.80GHz with all its flags.

I would like to know if there is any way to setting up this at VM's template
or direct at deployment xml.

I am able to use just by command line: "kvm -cpu host ....".

I know it can mess up the live migration, but I would like to test.

Thanks a lot

[1] http://www.linux-kvm.org/page/Tuning_KVM
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