[Qemu-devel] [PATCH v4 0/9] Core based CPU hotplug for PowerPC sPAPR

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

Hi,

This is the next version of the CPU hotplug patchset for PowerPC
sPAPR target. The hotplug semantics looks like this:

(qemu) device_add POWER8E-spapr-cpu-core,id=core2,core-id=16[,threads=4]
(qemu) device_add host-spapr-cpu-core,id=core2,core-id=16[,threads=4]
(qemu) device_add POWER8E_v2.1-spapr-cpu-core,id=core2,core-id=16[,threads=4]

Changes in v4
-------------
- Rebased against David Gibson's ppc-cpu-hotplug and hence dropped those
  patches that are already part of that tree.
- We were assuming the CPU thread to be always of type PowerPCCPU which
  needn't be true. Hence use actual CPU type's instance_size when
  object_initialize'ing the threads as per David's suggestion. This requires
  us to know the instance_size for a given type for which a new QOM API
  object_type_get_size() has been introduced in this version.
- Consolidate CPU init related routines in spapr_cpu_core.c. As part of this
  move spapr_cpu_init() and its dependencies to spapr_cpu_core.c.
- Got rid of the temporary unplug list when removing CPU cores.
- Folded spapr_cpu_core_create_threads() into spapr_cpu_core_realize() and
  fixed the error path in in spapr_cpu_core_realize().
- Add support for -cpu host.

TODOs remaining
---------------
- Work on David's suggestion of intializing CPU's ObjectClass in
  class_init rather than instance_init.
- Use object_initialize_with_type instead of object_initialize when
  creating CPU threads of a core.
- Use vcpu_dt_id logic when populating core id in
  spapr_query_hotpluggable_cpus().
- Handle CPU compat properly (-cpu host,compat=POWER7)

v3: https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg01829.html

Bharata B Rao (7):
  qom: API to get instance_size of a type
  spapr: Abstract CPU core device and type specific core devices
  spapr: Move spapr_cpu_init() to spapr_cpu_core.c
  spapr: convert boot CPUs into CPU core devices
  spapr: CPU hotplug support
  spapr: CPU hot unplug support
  hmp: Add 'info hotpluggable-cpus' HMP command

Igor Mammedov (2):
  QMP: Add query-hotpluggable-cpus
  spapr: implement query-hotpluggable-cpus callback

 hmp-commands-info.hx            |  14 ++
 hmp.c                           |  41 ++++
 hmp.h                           |   1 +
 hw/ppc/Makefile.objs            |   1 +
 hw/ppc/spapr.c                  | 215 +++++++++++++++------
 hw/ppc/spapr_cpu_core.c         | 405 ++++++++++++++++++++++++++++++++++++++++
 hw/ppc/spapr_events.c           |   3 +
 hw/ppc/spapr_rtas.c             |  24 +++
 include/hw/boards.h             |   5 +
 include/hw/ppc/spapr.h          |   7 +
 include/hw/ppc/spapr_cpu_core.h |  36 ++++
 include/qom/object.h            |   8 +-
 monitor.c                       |  13 ++
 qapi-schema.json                |  55 ++++++
 qmp-commands.hx                 |  23 +++
 qom/object.c                    |   8 +
 target-ppc/kvm.c                |  28 +++
 17 files changed, 828 insertions(+), 59 deletions(-)
 create mode 100644 hw/ppc/spapr_cpu_core.c
 create mode 100644 include/hw/ppc/spapr_cpu_core.h

-- 
2.1.0