[Qemu-devel] [RFC 00/12] target-i386: CPU hot-add with cpu_set QMP command

[Igor Mammedov]

Implements alternative way for hot-adding CPU using cpu_set QMP command,
wich could be useful until it would be possible to add CPUs via device_add.

Patches 
  1-10 are common to both approaches
  11-12 are specific to adding CPU using cpu_set

To hot-add CPU use following command from qmp-shell:
 cpu_set in=[apic id] status=online

git tree for testing: https://github.com/imammedo/qemu/tree/cpu_set

Igor Mammedov (12):
  target-i386: consolidate error propagation in x86_cpu_realizefn()
  target-i386: split APIC creation from initialization in
    x86_cpu_realizefn()
  target-i386: split out CPU creation and features parsing into
    cpu_x86_create()
  target-i386: introduce apic-id property
  target-i386: push hot-plugged VCPU state to KVM and unstop it
  target-i386: replace FROM_SYSBUS() with QOM type cast
  target-i386: Add ICC_BUS and attach apic, kvmvapic and cpu to it
  introduce CPU hot-plug notifier
  rtc: update rtc_cmos on CPU hot-plug
  acpi_piix4: add infrastructure to send CPU hot-plug GPE to guest
  qmp: add cpu_set qmp command
  target-i386: implement CPU hot-add

 cpus.c                                  |   11 ++-
 hw/acpi_piix4.c                         |  107 ++++++++++++++++++++-
 hw/apic_common.c                        |   14 ++-
 hw/apic_internal.h                      |    6 +-
 hw/i386/Makefile.objs                   |    2 +-
 hw/i386/kvmvapic.c                      |   22 +++--
 hw/i386/pc.c                            |   47 +++++++++-
 hw/icc_bus.c                            |   75 ++++++++++++++
 hw/icc_bus.h                            |   47 +++++++++
 hw/mc146818rtc.c                        |   12 +++
 include/sysemu/cpus.h                   |    3 +
 include/sysemu/sysemu.h                 |    6 +
 qapi-schema.json                        |    9 ++
 qmp-commands.hx                         |   26 +++++
 qmp.c                                   |   12 +++
 stubs/Makefile.objs                     |    4 +
 stubs/do_cpu_hot_add.c                  |    7 ++
 stubs/get_icc_bus.c                     |    6 +
 stubs/qemu_system_cpu_hotplug_request.c |    5 +
 stubs/resume_vcpu.c                     |    6 +
 target-i386/cpu.c                       |  164 ++++++++++++++++++++++++++-----
 target-i386/cpu.h                       |    3 +
 vl.c                                    |   14 +++
 23 files changed, 561 insertions(+), 47 deletions(-)
 create mode 100644 hw/icc_bus.c
 create mode 100644 hw/icc_bus.h
 create mode 100644 stubs/do_cpu_hot_add.c
 create mode 100644 stubs/get_icc_bus.c
 create mode 100644 stubs/qemu_system_cpu_hotplug_request.c
 create mode 100644 stubs/resume_vcpu.c