Re: [Qemu-devel] [RFC PATCH 0/7] i386: add cpu hot remove support

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

Hi Igor, Andreas,

How about this patchset? Could you please help to review it?
Any comment is welcome.

Regards,
Gu
On 07/11/2014 05:59 PM, Gu Zheng wrote:

> 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.
> 
> This job is based on Chen Fan's previous "cpu-del" patchset:
> https://lists.nongnu.org/archive/html/qemu-devel/2013-12/msg04266.html
> 
> And it depends on the previous "device_add foo-x86_64-cpu" patchset:
> https://lists.nongnu.org/archive/html/qemu-devel/2014-06/msg06690.html
> 
> Chen Fan (4):
>   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 (3):
>   i386: add cpu device_del support
>   qom cpu: add UNPLUG cpu notify support
>   cpus: reclaim allocated vCPU objects
> 
>  cpus.c                            |   44 ++++++++++++++++++++++++
>  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             |   23 ++++++++++++-
>  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   |    1 +
>  include/qom/cpu.h                 |    9 +++++
>  include/sysemu/kvm.h              |    1 +
>  include/sysemu/sysemu.h           |    2 +-
>  kvm-all.c                         |   57 +++++++++++++++++++++++++++++++-
>  qom/cpu.c                         |   27 ++++++++++++---
>  target-i386/cpu-qom.h             |    1 +
>  target-i386/cpu.c                 |   66 +++++++++++++++++++++++++++++++++++++
>  20 files changed, 332 insertions(+), 31 deletions(-)
>