Changes from v2->v3: * Call cpu_remove_sync rather than cpu_remove(). * Pull latest version of patches from pseries set (v6). Trivial change to "Reclaim VCPU objects" to fix checkpatch error. * Add object_unparent during s390_cpu_release to accomodate changes in Patch 4 "Reclaim VCPU objects." * Remove a cleanup patch in favor of 2 patches from pseries set.
************** The following patchset enables hotplug of s390 CPUs. The standard interface is used -- to configure a guest with 2 CPUs online at boot and 4 maximum: qemu -smp 2,maxcpus=4 To subsequently hotplug a CPU: Issue 'device_add s390-cpu,id=<id>' from monitor. At this point, the guest must bring the CPU online for use -- This can be achieved via "echo 1 > /sys/devices/system/cpu/cpuX/online" or via a management tool like cpuplugd. Hot unplug support is provided via 'device_del <id>', however s390 does not have a mechanism for gracefully handling a CPU that has been removed, so this event triggers a reset of the guest in order to force recognition. This patch set is based on work previously done by Jason Herne. Bharata B Rao (3): exec: Remove cpu from cpus list during cpu_exec_exit() exec: Do vmstate unregistration from cpu_exec_exit() cpu: Add a sync version of cpu_remove() Gu Zheng (1): cpu: Reclaim vCPU objects Matthew Rosato (6): s390x/cpu: Cleanup init in preparation for hotplug s390x/cpu: Set initial CPU state in common routine s390x/cpu: Move some CPU initialization into realize s390x/cpu: Add functions to (un)register CPU state s390/virtio-ccw: Add hotplug handler and prepare for unplug s390x/cpu: Allow hot plug/unplug of CPUs cpus.c | 50 +++++++++++++++++++++++++++++++++ exec.c | 30 ++++++++++++++++++++ hw/s390x/s390-virtio-ccw.c | 30 +++++++++++++++++++- hw/s390x/s390-virtio.c | 64 +++++++++++++++++++++++++++++++----------- hw/s390x/s390-virtio.h | 2 +- include/qom/cpu.h | 18 ++++++++++++ include/sysemu/kvm.h | 1 + kvm-all.c | 57 ++++++++++++++++++++++++++++++++++++- kvm-stub.c | 5 ++++ target-s390x/cpu.c | 70 +++++++++++++++++++++++++++++++++++++++++++--- target-s390x/cpu.h | 4 +++ 11 files changed, 308 insertions(+), 23 deletions(-) -- 1.9.1