On 01/27/2016 05:53 PM, Matthew Rosato wrote: > 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(-)
Acked-by: Christian Borntraeger <borntrae...@de.ibm.com> Alexander, if you are too busy at the moment, we could carry these patches via the s390/kvm tree? We want these patches merged, since we have to libvirt as well to use device_add instead of cpu_add (sigh). Christian
