Changes from v1->v2: * Remove cpu-add support. Instead use 'device_add s390-cpu' * Add unplug support via 'device_del'. * Pull in 2 patches from pseries set. Patch 1 just required some rebasing. Patch 2 required minor changes due to previous upstream review comments.
************** 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 (1): cpus: Add a sync version of cpu_remove() Matthew Rosato (8): cpus: Reclaim vCPU objects 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 s390x/cpu: Extra cleanup during CPU finalize s390/virtio-ccw: Add hotplug handler and prepare for unplug s390x/cpu: Allow hot plug/unplug of CPUs cpus.c | 53 +++++++++++++++++++++++++++++ hw/s390x/s390-virtio-ccw.c | 30 ++++++++++++++++- hw/s390x/s390-virtio.c | 66 ++++++++++++++++++++++++++---------- 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 | 83 +++++++++++++++++++++++++++++++++++++++++++--- target-s390x/cpu.h | 4 +++ 10 files changed, 295 insertions(+), 24 deletions(-) -- 1.9.1
