[PATCH v2 00/10] Adds CPU hot-plug support to Loongarch

[xianglai li]

Hello everyone, We refer to the implementation of ARM CPU
Hot-Plug to add GED-based CPU Hot-Plug support to Loongarch.

The first 4 patches are changes to the QEMU common code,
including adding GED support for CPU Hot-Plug, updating
the ACPI table creation process, and adding qdev_disconnect_gpio_out_named
and cpu_address_space_destroy interfaces to release resources
when CPU un-plug.

For the modification of the public part of the code, we refer to the
arm-related patch, and the link address of the corresponding patch is
as follows:
https://lore.kernel.org/all/20200613213629.21984-1-salil.mehta@huawei.com/

In order to respect the work of "Salil Mehta", we will rebase the first
4 patches in the final patch, which are referenced here to ensure that
the loongarch cpu hotplug can work properly.

The last 6 patches are Loongarch architecture-related,
and the modifications include the definition of the hook
function related to the CPU Hot-(UN)Plug, the allocation
and release of CPU resources when CPU Hot-(UN)Plug,
the creation process of updating the ACPI table,
and finally the custom switch for the CPU Hot-Plug.

V2:
- Fix formatting and spelling errors
- Split large patches into smaller patches
  - Split the original patch
    <<Add basic CPU hot-(un)plug support for Loongarch>> into
    <<Added CPU topology support for Loongarch>>
    <<Optimize loongarch_irq_init function implementation >>
    <<Add basic CPU hot-(un)plug support for Loongarch>>.
  - Split the original patch
    <<Update the ACPI table for the Loongarch CPU>> into
    <<Add generic event device for Loongarch>>
    <<Update the ACPI table for the Loongarch CPU>>
- Added loongarch cpu topology calculation method.
- Change the position of the cpu topology patch.
- Change unreasonable variable and function names.



xianglai li (10):
  Update ACPI GED framework to support vcpu hot-(un)plug
  Update CPUs AML with cpu-(ctrl)dev change
  make qdev_disconnect_gpio_out_named() public
  Introduce the CPU address space destruction function
  Added CPU topology support for Loongarch
  Optimize loongarch_irq_init function implementation
  Add basic CPU hot-(un)plug support for Loongarch
  Add support of *unrealize* for Loongarch cpu
  Add generic event device for Loongarch
  Update the ACPI table for the Loongarch CPU

 .../devices/loongarch64-softmmu/default.mak   |   1 +
 docs/system/loongarch/virt.rst                |  31 ++
 hw/acpi/acpi-cpu-hotplug-stub.c               |  15 +
 hw/acpi/cpu.c                                 |  27 +-
 hw/acpi/generic_event_device.c                |  33 ++
 hw/core/gpio.c                                |   4 +-
 hw/i386/acpi-build.c                          |   2 +-
 hw/loongarch/acpi-build.c                     |  33 +-
 hw/loongarch/generic_event_device_loongarch.c |  36 ++
 hw/loongarch/meson.build                      |   2 +-
 hw/loongarch/virt.c                           | 424 +++++++++++++++---
 include/exec/cpu-common.h                     |   8 +
 include/hw/acpi/cpu.h                         |   5 +-
 include/hw/acpi/cpu_hotplug.h                 |  10 +
 include/hw/acpi/generic_event_device.h        |   6 +
 include/hw/core/cpu.h                         |   1 +
 include/hw/loongarch/virt.h                   |  10 +-
 include/hw/qdev-core.h                        |   2 +
 softmmu/physmem.c                             |  24 +
 target/loongarch/cpu.c                        |  35 +-
 target/loongarch/cpu.h                        |  13 +-
 21 files changed, 635 insertions(+), 87 deletions(-)
 create mode 100644 hw/loongarch/generic_event_device_loongarch.c

Cc: "Salil Mehta" <salil.mehta@opnsrc.net>
Cc: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Cc: Song Gao <gaosong@loongson.cn>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Ani Sinha <anisinha@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Eduardo Habkost <eduardo@habkost.net>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: "Philippe Mathieu-Daudé" <philmd@linaro.org>
Cc: Yanan Wang <wangyanan55@huawei.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Bibo Mao <maobibo@loongson.cn>
Cc: Xianglai li <lixianglai@loongson.cn>
--
2.39.1