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

[Richard W.M. Jones]

On Mon, Sep 14, 2020 at 10:08:50AM -0500, Eric Blake wrote:
> On 9/14/20 3:47 AM, 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>
> >---
> 
> Reviewed-by: Eric Blake <eblake@redhat.com>
> 
> But as Peter points out, where is the introspection for whether this
> command line argument exists?

FWIW libguestfs still tests some qemu features by grepping -help
output.  That's actually what I'm intending to do with this one, at
least for now.

Rich.

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