Re: [Qemu-devel] [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models

[Andreas Färber]

Am 08.06.2015 um 22:18 schrieb Jiri Denemark:
>> To help libvirt in the transition, a x86-cpu-model-dump script is provided,
>> that will generate a config file that can be loaded using -readconfig, based 
>> on
>> the -cpu and -machine options provided in the command-line.
> 
> Thanks Eduardo, I never was a big fan of moving (or copying) all the CPU
> configuration data to libvirt, but now I think it actually makes sense.
> We already have a partial copy of CPU model definitions in libvirt
> anyway, but as QEMU changes some CPU models in some machine types (and
> libvirt does not do that) we have no real control over the guest CPU
> configuration. While what we really want is full control to enforce
> stable guest ABI.

That sounds like FUD to me. Any concrete data points where QEMU does not
have a stable ABI for x86 CPUs? That's what we have the pc*-x.y machines
for.

Regards,
Andreas

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