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Re: [PATCH v5 1/8] qemu-options: New -compat to set policy for deprecate

From: Markus Armbruster
Subject: Re: [PATCH v5 1/8] qemu-options: New -compat to set policy for deprecated interfaces
Date: Mon, 21 Sep 2020 16:35:40 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

Peter Krempa <pkrempa@redhat.com> writes:

> On Mon, Sep 14, 2020 at 10:47:55 +0200, Markus Armbruster wrote:
>> Policy is separate for input and output.
>> Input policy can be "accept" (accept silently), or "reject" (reject
>> the request with an error).
>> Output policy can be "accept" (pass on unchanged), or "hide" (filter
>> out the deprecated parts).
>> Default is "accept".  Policies other than "accept" are implemented
>> later in this series.
>> For now, -compat covers only syntactic aspects of QMP, i.e. stuff
>> tagged with feature 'deprecated'.  We may want to extend it to cover
>> semantic aspects, CLI, and experimental features.
>> The option is experimental.
>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>> ---
> I wasn't able to find any good anchor point which would allow me to
> detect that this command line option/feature is present.
> Is there anything in e.g. in query-qmp-schema or query-command-line-options
> I could base this capability on?

You asked this in review of v4.  I didn't have a ready answer then, and
forgot to figure out a solution before I post v5.  Thanks for the

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