On 12/02/2016 20:55, Suravee Suthikulpanit wrote: >> Is it just this, or is there anything else? > > For VM Migration, I meant the process of taking a snapshot of the VM and > later on loading it back to resume where it left off, and not necessary > to a different type of system. This would require saving off the VAPIC > backing page of each vCPU along with the rest of per-VM AVIC data > structures. IIUC, this might require changes in the QEmu as well.
It comes for free if you use regs for the backing page as I mentioned. QEMU then manipulates the registers as usual throgh KVM_GET_LAPIC/KVM_SET_LAPIC. Same for non-AVIC <-> AVIC migration. Paolo
