Re: [PATCH for-6.0 1/6] qapi: Add query-accel command

[Eduardo Habkost]

On Wed, Nov 18, 2020 at 09:56:28AM -0600, Eric Blake wrote:
> On 11/18/20 9:45 AM, Eduardo Habkost wrote:
> > On Wed, Nov 18, 2020 at 02:53:26PM +0100, Markus Armbruster wrote:
> > [...]
> >> Another way to skin this cat:
> >>
> >>       {"available": {"kvm": { extra properties... },
> >>                      "tcg": ...,
> >>                      "xen": ...},
> >>        "active": "kvm"}
> > 
> > How would this structure be represented in the QAPI schema?
> > 
> > In other words, how do I say "Dict[str, AccelInfo]" in QAPIese?
> 
> {'type':'AvailAccel', 'data': {
>   '*kvm': 'KvmExtraProps',
>   '*tcg': 'TcgExtraProps',
>   '*xen': 'XenExtraProps',
>   '*hax': 'HaxExtraProps' } }
> {'command':'query-accel', 'returns': {
>    'available': 'AvailAccel', 'active': 'strOrEnum' } }
> 
> where adding a new accelerator then adds a new optional member to
> AvailAccel as well as possibly a new enum member if 'active' is driving
> by an enum instead of 'str'.

Is it possible to represent this if we don't enumerate all
possible dictionary keys in advance?  (I'm not suggesting we
should/shouldn't do that, just wondering if it's possible)

-- 
Eduardo