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s390x/sclp: mark sclp-cpu-hotplug as non-usercreatable 

A TYPE_SCLP_CPU_HOTPLUG device for handling cpu hotplug events
is already created by the sclp event facility. Adding a second
TYPE_SCLP_CPU_HOTPLUG device via -device sclp-cpu-hotplug creates
an ambiguity in raise_irq_cpu_hotplug(), leading to a crash once
a cpu is hotplugged.

To fix this, disallow creating a sclp-cpu-hotplug device manually.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Cornelia Huck 2017-10-04 17:34:23 +02:00
parent e6cb60bf15
commit 7aa4d85d29
1 changed files with 6 additions and 0 deletions
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6
hw/s390x/sclpcpu.c
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@ -82,6 +82,12 @@ static void cpu_class_init(ObjectClass *oc, void *data)
k->get_receive_mask = receive_mask;
k->read_event_data = read_event_data;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
/*
* Reason: raise_irq_cpu_hotplug() depends on an unique
* TYPE_SCLP_CPU_HOTPLUG device, which is already created
* by the sclp event facility
*/
dc->user_creatable = false;
}
static const TypeInfo sclp_cpu_info = {