Das notwendige Paket heißt qemu-kvm, nicht kvm
$ apt-cache policy qemu-kvm
qemu-kvm:
Installiert: 1:2.8+dfsg-3~bpo8+1A~4.2.0.201703271321
Installationskandidat: 1:2.8+dfsg-3~bpo8+1A~4.2.0.201703271321
Versionstabelle:
*** 1:2.8+dfsg-3~bpo8+1A~4.2.0.201703271321 0
500 https://updates.software-univention.de/4.2/maintained/ 4.2-0/amd64/ Packages
100 /var/lib/dpkg/status
1.1.2+dfsg-6.55.201708152029 0
500 https://updates.software-univention.de/4.1/maintained/ 4.1-5/amd64/ Packages
1.1.2+dfsg-6.51.201605111106 0
500 https://updates.software-univention.de/4.1/maintained/ 4.1-3/amd64/ Packages
1.1.2+dfsg-6.50.201605111104 0
500 https://updates.software-univention.de/4.0/maintained/component/ 4.0-4-errata/amd64/ Packages
1.1.2+dfsg-6.48.201510271706 0
500 https://updates.software-univention.de/4.0/maintained/ 4.0-4/amd64/ Packages
1.1.2+dfsg-6.47.201506231351 0
500 https://updates.software-univention.de/4.0/maintained/ 4.0-3/amd64/ Packages
1.1.2+dfsg-6.43.201501191249 0
500 https://updates.software-univention.de/4.0/maintained/ 4.0-1/amd64/ Packages
1.1.2+dfsg-6.36.201411131534 0
500 https://updates.software-univention.de/4.0/maintained/ 4.0-0/amd64/ Packages
Ansonsten sollte der Artikel helfen:
https://help.univention.com/t/qemu-suspend-to-disk-and-live-migration-issues-with-ucs-4-2/6498