[libvirt] [PATCH 0/6] qemu: Fix "Property '.pconfig' not found" error

[Daniel P. Berrangé]

On Mon, Nov 11, 2019 at 09:35:31PM +0100, Jiri Denemark wrote:
> The pconfig feature was enabled in QEMU by accident in 3.1.0. All other
> newer versions do not support it and it was removed from the
> Icelake-Server CPU model in QEMU.
> 
> We don't normally change our CPU models even when QEMU does so to avoid
> breaking migrations between different versions of libvirt. But we can
> safely do so in this specific case. QEMU never supported enabling
> pconfig so any domain which was able to start has pconfig disabled.
> 
> With a small compatibility hack which explicitly disables pconfig when
> CPU model equals Icelake-Server in migratable domain definition, only
> one migration scenario stays broken (and there's nothing we can do about
> it): from any host to a host with libvirt < 5.10.0 and QEMU > 3.1.0.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1749672
> 
> Jiri Denemark (6):
>   cpu_conf: Pass policy to CPU feature filtering callbacks
>   qemuxml2*test: Add tests for Icelake-Server,-pconfig
>   qemu: Drop disabled CPU features unknown to QEMU
>   cpu_map: Drop comments about ospke
>   cputest: Add data for Ice Lake Server CPU
>   cpu_map: Drop pconfig from Icelake-Server CPU model

Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>


Regards,
Daniel
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