of element ``vcpu`` is not specified, the vCPU is pinned to all the physical
CPUs by default. It contains two required attributes, the attribute ``vcpu``
specifies vCPU id, and the attribute ``cpuset`` is same as attribute
- ``cpuset`` of element ``vcpu``. (NB: Only qemu driver support) :since:`Since
- 0.9.0`
+ ``cpuset`` of element ``vcpu``.
+ :since:`QEMU driver support since 0.9.0, Xen driver support since 0.9.1`
``emulatorpin``
The optional ``emulatorpin`` element specifies which of host physical CPUs
the "emulator", a subset of a domain not including vCPU or iothreads will be