Hello, for meltdown mitigation and performance it's important to have the pcid flag passed down to the guest (f.e. https://groups.google.com/forum/m/#!topic/mechanical-sympathy/L9mHTbeQLNU).
My host shows the flag: # grep ' pcid ' /proc/cpuinfo | wc -l 56 But the guest does not: # grep pcid /proc/cpuinfo # Guest was started with: -cpu IvyBridge,+kvm_pv_unhalt,+kvm_pv_eoi,enforce,vendor=GenuineIntel Qemu is 2.9.1 Thanks! Greets, Stefan