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s390x: allow cpu hotplug via device_add

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E.g. the following now works:
    device_add host-s390-cpu,id=cpu1,core-id=1

The system will perform the same checks as when using cpu_add:
- If the core_id is already in use
- If the next sequential core_id isn't used
- If core-id >= max_cpu is specified

In addition, mixed CPU models are checked. E.g. if starting with
-cpu host and trying to hotplug "qemu-s390-cpu":
    "Mixed CPU models are not supported on s390x."

Reviewed-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170913132417.24384-17-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2017-09-13 15:24:11 +02:00 committed by Cornelia Huck
parent 99aa6bf29b
commit 0347ab8469
1 changed files with 1 additions and 0 deletions
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target/s390x/cpu.c
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@ -467,6 +467,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
scc->parent_realize = dc->realize;
dc->realize = s390_cpu_realizefn;
dc->props = s390x_cpu_properties;
dc->user_creatable = true;
scc->parent_reset = cc->reset;
#if !defined(CONFIG_USER_ONLY)