test if xen is enabled only once
Signed-off-by:Juan Quintela <quintela@redhat.com> Signed-off-by:
Anthony Liguori <aliguori@us.ibm.com>
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Signed-off-by:Juan Quintela <quintela@redhat.com> Signed-off-by:
Anthony Liguori <aliguori@us.ibm.com>