cpu: Partially revert "cpu: Change qemu_init_vcpu() argument to CPUState"

Commit c643bed99 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: Chen 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: Andreas Färber <afaerber@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/target-moxie/cpu.c b/target-moxie/cpu.c
index 6550be5..d97a091 100644
--- a/target-moxie/cpu.c
+++ b/target-moxie/cpu.c
@@ -45,10 +45,11 @@ static void moxie_cpu_reset(CPUState *s)
 
 static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
 {
-    MoxieCPU *cpu = MOXIE_CPU(dev);
+    CPUState *cs = CPU(dev);
     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
 
-    cpu_reset(CPU(cpu));
+    qemu_init_vcpu(cs);
+    cpu_reset(cs);
 
     mcc->parent_realize(dev, errp);
 }