Re: [Qemu-devel] [RFC V2 00/10] cpu: add device_add foo-x86_64-cpu and i386 cpu hot remove support

[Gu Zheng <guz.fnst@cn.fujitsu.com>]

Hi Igor,
As your hot-plug rework has been merged in upstream, and we need to respin
the i386 cpu hot remove a lot based on the latest tree.
So I want to split the series into two parts:
Part 1/2: add device_add foo-x86_64-cpu support.
Part 2/2: i386 cpu hot remove support.
, which will be easy to review.
The Part 1/2 will come soon, and Part 2/2 will be sent out once the rework
is done.
What's your opinion?

Thanks,
Gu 

On 08/28/2014 11:36 AM, Gu Zheng wrote:

> This series is based on the previous patchset from Chen Fan:
> https://lists.nongnu.org/archive/html/qemu-devel/2014-05/msg02360.html
> https://lists.nongnu.org/archive/html/qemu-devel/2013-12/msg04266.html
> 
> Patch 1~3: add device_add foo-x86_64-cpu support
> These three patches try to make cpu hotplug with device_add, and make
> "-device foo-x86_64-cpu" available，also we can set apic-id
> property with command line, if without setting apic-id property,
> we offer the first unoccupied apic id as the default new apic id.
> When hotplug cpu with device_add, additional check of APIC ID will be
> done after cpu object initialization which was different from
> 'cpu_add' command that check 'ids' at the beginning.
> 
> Patch 4~10: add i386 cpu hot remove support
> 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 'device_del' to remove vCPU from
> QEMU itself.
> 
> v2:
>  -fix the cpu index duplicated issue in the QMP/HMP command output.
> 
> Chen Fan (6):
>   cpu: introduce CpuTopoInfo structure for argument simplification
>   cpu: add device_add foo-x86_64-cpu support
>   x86: add x86_cpu_unrealizefn() for cpu apic remove
>   qom cpu: rename variable 'cpu_added_notifier' to
>     'cpu_hotplug_notifier'
>   i386: implement pc interface cpu_common_unrealizefn() in qom/cpu.c
>   cpu hotplug: implement function cpu_status_write() for vcpu ejection
> 
> Gu Zheng (4):
>   qom/cpu: move register_vmstate to common CPUClass.realizefn
>   i386: add cpu device_del support
>   qom cpu: add UNPLUG cpu notify support
>   cpus: reclaim allocated vCPU objects
> 
>  cpus.c                            |   48 +++++++++++++-
>  exec.c                            |   32 +++++----
>  hw/acpi/cpu_hotplug.c             |   55 +++++++++++++--
>  hw/acpi/ich9.c                    |   13 ++--
>  hw/acpi/piix4.c                   |   21 +++---
>  hw/i386/acpi-dsdt-cpu-hotplug.dsl |    6 ++-
>  hw/i386/kvm/apic.c                |    8 ++
>  hw/i386/pc.c                      |    2 +-
>  hw/intc/apic.c                    |   10 +++
>  hw/intc/apic_common.c             |   26 ++++++-
>  include/hw/acpi/cpu_hotplug.h     |   14 ++++-
>  include/hw/acpi/ich9.h            |    2 +-
>  include/hw/cpu/icc_bus.h          |    1 +
>  include/hw/i386/apic_internal.h   |    3 +
>  include/qom/cpu.h                 |   12 +++
>  include/sysemu/kvm.h              |    1 +
>  include/sysemu/sysemu.h           |    2 +-
>  kvm-all.c                         |   57 +++++++++++++++-
>  monitor.c                         |    4 +-
>  qdev-monitor.c                    |    1 +
>  qom/cpu.c                         |   29 +++++++--
>  target-i386/cpu-qom.h             |    1 +
>  target-i386/cpu.c                 |  138 ++++++++++++++++++++++++++++++++++++-
>  target-i386/topology.h            |   51 +++++++++----
>  24 files changed, 470 insertions(+), 67 deletions(-)
>