Hi Bhupinder, On Tue, Feb 27, 2018 at 03:01:17PM +0530, bthakur@xxxxxxxxxxxxxx wrote: > I hope it is the right forum to post my query. > > > > I am currently looking at the possibility of adding a new VCPU to a running > guest VM in KVM/ARM. I see that currently, it is not allowed to add a new > VCPU to a guest VM, if it is already initialized. The first check in > kvm_arch_vcpu_create() returns failure if it is already initialized. > This would require a major rework of a lot of logic surrounding the GIC and other parts of KVM initialization. > > > There was some work done in QEMU to add support for VCPU hotplug: > https://lists.gnu.org/archive/html/qemu-arm/2017-05/msg00404.html > > > > But I am looking at the KVM side for enabling adding a new VCPU. If you can > point me to any relevant work/resources, which I can refer to then it will > help me. > I don't have any specific pointers, but I was always told that the way we were going to do CPU hotplug would be to instantiate a large number of VCPUs, and hotplug would be equivalent to turning on a VCPU which was previously powered off. Is this not still a feasible solution? How does VCPU hotplug work on x86? Thanks, -Christoffer _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
