ubuntu_kvm_smoke_test: uvt-kvm: error: libvirt: XML error: No PCI buses available on s390x

02:56:35 DEBUG| stdout:
02:56:35 DEBUG| INFO: /dev/kvm exists
02:56:35 DEBUG| KVM acceleration can be used
02:56:35 DEBUG| stderr:
02:56:35 DEBUG| + SUT=bjf-test
02:56:35 DEBUG| + SSH_KEY=/home/ubuntu/.ssh/id_rsa
02:56:35 DEBUG| + SSH_OPTIONS='-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=quiet -i /home/ubuntu/.ssh/id_rsa'
02:56:35 DEBUG| ++ lsb_release -c
02:56:35 DEBUG| ++ awk '{print$2}'
02:56:35 DEBUG| + DISTRO=xenial
02:56:35 DEBUG| + ARCHITECTURE=s390x
02:56:35 DEBUG| + trap cleanup EXIT
02:56:35 DEBUG| + '[' -z s390x ']'
02:56:35 DEBUG| + kvm-ok
02:56:35 DEBUG| + '[' 0 '!=' 0 ']'
02:56:35 DEBUG| + set -e
02:56:35 DEBUG| + '[' '!' -f /home/ubuntu/.ssh/id_rsa ']'
02:56:35 DEBUG| + '[' s390x = ppc64el ']'
02:56:35 DEBUG| ++ uvt-simplestreams-libvirt query
02:56:35 DEBUG| ++ grep -P 'xenial.*s390x'
02:56:35 DEBUG| + image='release=xenial arch=s390x label=daily (20210203)'
02:56:35 DEBUG| + '[' -z 'release=xenial arch=s390x label=daily (20210203)' ']'
02:56:35 DEBUG| + uvt-kvm create bjf-test release=xenial arch=s390x
02:56:35 DEBUG| uvt-kvm: error: libvirt: XML error: No PCI buses available
02:56:35 DEBUG| + cleanup
02:56:35 DEBUG| + uvt-kvm destroy bjf-test
02:56:36 INFO | ERROR ubuntu_kvm_smoke_test.kvm_smoke_test ubuntu_kvm_smoke_test.kvm_smoke_test timestamp=1630983396 localtime=Sep 07 02:56:36 Command <sudo -u ubuntu /home/ubuntu/autotest/client/tests/ubuntu_kvm_smoke_test/the-test s390x> failed, rc=1, Command returned non-zero exit status