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Re: [Qemu-devel] [Patch 01/30] qmp: details about CPU definitions in que

From: Eric Blake
Subject: Re: [Qemu-devel] [Patch 01/30] qmp: details about CPU definitions in query-cpu-definitions
Date: Mon, 29 Aug 2016 09:47:01 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

On 08/29/2016 05:13 AM, David Hildenbrand wrote:
> It might be of interest for tooling whether a CPU definition can be safely
> used when migrating, or if e.g. CPU features might get lost during
> migration when migrationg from/to a different QEMU version or host, even if
> the same compatibility machine is used.
> Also, we want to know if a CPU definition is static and will never change.
> Beause these definitions can then be used independantly of a compatibility
> machine and will always have the same feature set, they can e.g. be used
> to indicate the "host" model in libvirt later on.
> Let's add two return values to query-cpu-definitions, stating for each
> returned CPU definition, if it is migration-safe and if it is static.
> While "migration-safe" is optional, "static" will be set to "false"
> automatically by all implementing architectures. If a model really was
> static all the time and will be in the future, this can simply be changed
> later.
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
>  qapi-schema.json | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)

Reviewed-by: Eric Blake <address@hidden>

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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