Perf for only one VM?

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Is it possible to get perf kvm record to record only what's going on
on a single VM?  The options seem to be --host (all host data) and
--guest (all VM data).

I'm getting "    74.86%  qemu-kvm  [unknown]                [u]
0x7f3795bc408d", and I think that's because I've got kallsyms loaded
from a particular guest, but not the others.

-Robin
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