QEMU v4.0 released

QEMU v4.0 is out. Besides a number of small enhancements, some items that we would like to highlight from a KVM on Z perspective:

• CPU models for z14 GA2 as follows:
     $ qemu-system-s390x -cpu help -enable-kvm | grep z14.2
     s390 z14.2-base      IBM z14 GA2           (static, migration-safe)
     s390 z14.2           IBM z14 GA2           (migration-safe)
• vfio-ap now supports hotplugging of vfio-ap devices.