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    • Andreas Färber's avatar
      cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState" · 14a10fc3
      Andreas Färber authored
      Commit c643bed9 moved qemu_init_vcpu() calls to common CPUState code.
      This causes x86 cpu-add to fail with "KVM: setting VAPIC address failed".
      
      The reason for the failure is that CPUClass::kvm_fd is not yet
      initialized in the following call graph:
      ->x86_cpu_realizefn
       ->x86_cpu_apic_realize
        ->qdev_init
         ->device_set_realized
          ->device_reset (hotplugged == 1)
           ->apic_reset_common
            ->vapic_base_update
             ->kvm_apic_vapic_base_update
      This causes attempted KVM vCPU ioctls to fail.
      
      By contrast, in the non-hotplug case the APIC is reset much later, when
      the vCPU is already initialized.
      
      As a quick and safe solution, move the qemu_init_vcpu() call back into
      the targets' realize functions.
      Reported-by: default avatarChen Fan <chen.fan.fnst@cn.fujitsu.com>
      Acked-by: Igor Mammedov <imammedo@redhat.com> (for i386)
      Tested-by: Jia Liu <proljc@gmail.com> (for openrisc)
      Signed-off-by: default avatarAndreas Färber <afaerber@suse.de>
      14a10fc3
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