On 20/06/13 19:32, Christoffer Dall wrote: >> So there is just one thing we absolutely need to make sure here: no vcpu >> can run before they've all had their timer restored, and hence a stable >> cntvoff. Otherwise two vcpus will have a different view of time. >> >> Can we guarantee this? >> > > Do we need to? User space is free to modify time and all sort of other > registers at any point during VM execution - it will just break the > guest that it's running. > > I think the key here is that we expect the VM to be stopped for all > save/restore operations (we can enforce it if we want to, which I am > going to for the VGIC state, because we don't want to interfere with > consistent state being written to the hardware). If that's what we expect, then it's fine by me. M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
