Re: [qemu-s390x] [Qemu-devel] [PATCH v4 09/14] spapr: handle cpu core unplug via hotplug handler chain

[Igor Mammedov]

On Thu, 17 May 2018 10:15:22 +0200
David Hildenbrand <address@hidden> wrote:

> Let's handle it via hotplug_handler_unplug().
> 
> Signed-off-by: David Hildenbrand <address@hidden>
Acked-by: Igor Mammedov <address@hidden>

> ---
>  hw/ppc/spapr.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 286c38c842..13d153b5a6 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -3412,7 +3412,16 @@ static void *spapr_populate_hotplug_cpu_dt(CPUState 
> *cs, int *fdt_offset,
>  /* Callback to be called during DRC release. */
>  void spapr_core_release(DeviceState *dev)
>  {
> -    MachineState *ms = MACHINE(qdev_get_hotplug_handler(dev));
> +    HotplugHandler *hotplug_ctrl = qdev_get_hotplug_handler(dev);
> +
> +    /* Call the unplug handler chain. This can never fail. */
> +    hotplug_handler_unplug(hotplug_ctrl, dev, &error_abort);
> +}
> +
> +static void spapr_core_unplug(HotplugHandler *hotplug_dev, DeviceState *dev,
> +                              Error **errp)
> +{
> +    MachineState *ms = MACHINE(hotplug_dev);
>      sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
>      CPUCore *cc = CPU_CORE(dev);
>      CPUArchId *core_slot = spapr_find_cpu_slot(ms, cc->core_id, NULL);
> @@ -3623,6 +3632,8 @@ static void spapr_machine_device_unplug(HotplugHandler 
> *hotplug_dev,
>      /* final stage hotplug handler */
>      if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
>          spapr_memory_unplug(hotplug_dev, dev, &local_err);
> +    } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) {
> +        spapr_core_unplug(hotplug_dev, dev, &local_err);
>      } else if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
>          hotplug_handler_unplug(dev->parent_bus->hotplug_handler, dev,
>                                 &local_err);