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.me...@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.me...@opnsrc.net> Cc: Xiaojuan Yang <yangxiaoj...@loongson.cn> Cc: Song Gao <gaos...@loongson.cn> Cc: "Michael S. Tsirkin" <m...@redhat.com> Cc: Igor Mammedov <imamm...@redhat.com> Cc: Ani Sinha <anisi...@redhat.com> Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Richard Henderson <richard.hender...@linaro.org> Cc: Eduardo Habkost <edua...@habkost.net> Cc: Marcel Apfelbaum <marcel.apfelb...@gmail.com> Cc: "Philippe Mathieu-Daudé" <phi...@linaro.org> Cc: Yanan Wang <wangyana...@huawei.com> Cc: "Daniel P. Berrangé" <berra...@redhat.com> Cc: Peter Xu <pet...@redhat.com> Cc: David Hildenbrand <da...@redhat.com> Cc: Bibo Mao <maob...@loongson.cn> Cc: Xianglai li <lixiang...@loongson.cn> -- 2.39.1