Re: [libvirt PATCH v3 5/5] qemu: enable asynchronous teardown on s390x hosts by default

Enable by default asynchronous teardown on S390 hosts and add tests for asynchronous teardown autogeneration support. On S390 hosts, Secure Execution guests can take a long time to shutdown, since the memory cleanup can take a long time. Since there is no practical way to determine whether a S390 guest is running in Secure Execution mode, and since the asynchronous teardown does not impact normal (not Secure Execution) guests or guests without large memory configurations, we enable asynchronous teardown by default on S390. A user can select to override the default in the guest domain XML. Signed-off-by: Boris Fiuczynski<fiuczy(a)linux.ibm.com> ---