It ships with QEMU v2.6 and libvirt v1.3.3. Here is a list of highlights from a KVM on z perspective:
- Enhanced SCA support
Exploit up to 248 CPUs per KVM guest
- SIE capability
Expose SIE availability in /proc/cpuinfo as follows:
$ cat /proc/cpuinfo | grep features
features : esan3 zarch stfle msa ldisp eimm dfp edat etf3eh
highgprs te vx sie
- STP host toleration
Previously, Server Time Protocol (STP) had to be turned off in the host. In case of time differences, the TOD clock is adjusted in a smooth manner, avoiding jumps.
- Improved removable media support
Allow to boot KVM guests seamlessly from ISO9660 media.
- OASIS VIRTIO v1.0 support
Support OASIS OASIS standard for virtio devices.
- CPU hotplugging
Allow to add CPUs dynamically to a running guest
- STHYI support: Added the z/VM-defined Store Hypervisor Information instruction (STHYI) for KVM guests. See also here.