Re: [PATCH v5 18/18] qapi: introduce DEVICE_ON event

[Michael S. Tsirkin]

On Thu, Feb 16, 2023 at 09:03:56PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> We have DEVICE_DELETED event, that signals that device_del command is
> actually completed. But we don't have a counter-part for device_add.
> Still it's sensible for SHPC and PCIe-native hotplug, as there are time
> when the device in some intermediate state. Let's add an event that say
> that the device is finally powered on, power indicator is on and
> everything is OK for next manipulation on that device.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
> ---
>  qapi/qdev.json | 10 ++++++++++
>  hw/pci/pcie.c  | 14 ++++++++++++++
>  hw/pci/shpc.c  | 12 ++++++++++++
>  3 files changed, 36 insertions(+)
> 
> diff --git a/qapi/qdev.json b/qapi/qdev.json
> index 6f2d8d6647..116a8a7de8 100644
> --- a/qapi/qdev.json
> +++ b/qapi/qdev.json
> @@ -348,3 +348,13 @@
>  { 'command': 'query-hotplug',
>    'data': { 'id': 'str' },
>    'returns': 'HotplugInfo' }
> +
> +##
> +# @DEVICE_ON:
> +#
> +# Emitted whenever the device insertion completion is acknowledged by the 
> guest.
> +# For now only emitted for SHPC and PCIe-native hotplug.
> +#
> +# Since: 8.0
> +##
> +{ 'event': 'DEVICE_ON', 'data': 'DeviceAndPath' }

Same as any event, this has to be accompanied by a query.
Which query returns the "ON" status?

-- 
MST