[Qemu-devel] [RFC qom-next v5 0/8] i386: add cpu hot remove support

[Chen Fan <chen.fan.fnst@cn.fujitsu.com>]

Via implementing ACPI standard methods _EJ0 in ACPI table, after Guest OS remove
one vCPU online, the fireware will store removed bitmap to QEMU, then QEMU could
know to notify the assigned vCPU of exiting. meanwhile, intruduce the QOM command
'cpu-del' to remove vCPU from QEMU itself. currently, this patches only support
the cpu deleted sequentially from the last one, and command 'cpu-del' would always
delete the last cpu every time. in libvirt, command 'virsh set-vcpus' always add/delete
vcpu sequentially, so I think this patches will be OK.

this work is based on Andreas Färber's qom-next branch tree.
    git://github.com/afaerber/qemu-next.git

this series patches must be used with KVM patch together.

for KVM patches:
    http://comments.gmane.org/gmane.comp.emulators.kvm.devel/114347


v4-v5: delete command 'cpu-del' argument to remove cpu from the last one
rather than specify vcpuid and fix migration bug.

Chen Fan (8):
  x86: move apic_state field from CPUX86State to X86CPU
  x86: add x86_cpu_unrealizefn() for cpu apic remove
  qmp: add 'cpu-del' command support
  qom cpu: rename variable 'cpu_added_notifier' to
    'cpu_hotplug_notifier'
  qom cpu: add UNPLUG cpu notifier support
  i386: implement pc interface cpu_common_unrealizefn() in qom/cpu.c
  piix4: implement function cpu_status_write() for vcpu ejection
  cpus: reclaim allocated vCPU objects

 cpu-exec.c                        |  2 +-
 cpus.c                            | 51 ++++++++++++++++++++++++++++--
 hw/acpi/piix4.c                   | 66 ++++++++++++++++++++++++++++++++-------
 hw/i386/acpi-dsdt-cpu-hotplug.dsl |  6 +++-
 hw/i386/kvm/apic.c                |  8 +++++
 hw/i386/kvmvapic.c                |  8 ++---
 hw/i386/pc.c                      | 38 ++++++++++++++++------
 hw/i386/pc_piix.c                 |  3 +-
 hw/intc/apic.c                    | 10 ++++++
 hw/intc/apic_common.c             | 23 +++++++++++++-
 hw/xen/xen_apic.c                 |  8 +++++
 include/hw/boards.h               |  2 ++
 include/hw/cpu/icc_bus.h          |  1 +
 include/hw/i386/apic_internal.h   |  1 +
 include/hw/i386/pc.h              |  1 +
 include/qom/cpu.h                 | 21 +++++++++++++
 include/sysemu/kvm.h              |  1 +
 include/sysemu/sysemu.h           |  2 +-
 kvm-all.c                         | 25 +++++++++++++++
 qapi-schema.json                  | 10 ++++++
 qmp-commands.hx                   | 21 +++++++++++++
 qmp.c                             |  9 ++++++
 qom/cpu.c                         | 26 ++++++++++++---
 target-i386/cpu-qom.h             |  5 +++
 target-i386/cpu.c                 | 66 ++++++++++++++++++++++++++++++++-------
 target-i386/cpu.h                 |  4 ---
 target-i386/helper.c              |  9 +++---
 target-i386/kvm.c                 | 23 ++++++--------
 target-i386/misc_helper.c         |  8 ++---
 29 files changed, 380 insertions(+), 78 deletions(-)

-- 
1.8.1.4