[libvirt] [PATCH 0/4] qemu: Use host-model CPU on s390 by default

Christian Borntraeger borntraeger at de.ibm.com
Fri Nov 15 14:55:04 UTC 2019

On 15.11.19 15:47, Jiri Denemark wrote:
> On Fri, Nov 15, 2019 at 15:12:18 +0100, Boris Fiuczynski wrote:
>> Just a heads up.
>> After installing libvirt rpms of this branch all my existing kvm s390 
>> domains ended up with
>>    <cpu mode='custom' match='exact' check='none'>
>>      <model fallback='forbid'>qemu</model>
>>    </cpu>
>> Newly defined domains without specified cpu do so as well.
> Unless the domains are all TCG, it seems your QEMU is too old. You need
> a fairly recent one which contains commit v4.1.0-1683-gde60a92ea7
> (s390x/kvm: Set default cpu model for all machine classes)
> I the domains all use KVM and you have new enough QEMU, there might be a
> bug somewhere. Which should not happen :=)

So shouldnt libvirt fence this rework (add default model) to qemu 4.2 and newer?

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