This series is an attempt to provide CPU hotplug support on ARM virt platform. This is based on ACPI GED device. We should enable ACPI support, and use vGICv3 and 64bit CPU to support CPU hotplug. Under KVM accel, the KVM vCPUs is pre-created. Besides, vGIC IRIs is pre-created too. However, QEMU vCPU objects are defer-created. Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
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