Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru> writes:
> Send a new event when guest reads virtio-pci config after
> virtio_notify_config() call.
>
> That's useful to check that guest fetched modified config, for example
> after resizing disk backend.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru>
[...]
> diff --git a/qapi/qdev.json b/qapi/qdev.json
> index 6ece164172..ffc5e3be18 100644
> --- a/qapi/qdev.json
> +++ b/qapi/qdev.json
> @@ -179,3 +179,29 @@
> { 'command': 'device-sync-config',
> 'features': [ 'unstable' ],
> 'data': {'id': 'str'} }
> +
> +##
> +# @VIRTIO_CONFIG_READ:
> +#
> +# Emitted whenever guest reads virtio device config after config change.
Let's not abbreviate "configuration" to "config".
> +#
> +# @device: device name
> +#
> +# @path: device path
> +#
> +# Features:
> +#
> +# @unstable: The event is experimental.
> +#
> +# Since: 9.0
> +#
> +# Example:
> +#
> +# <- { "event": "VIRTIO_CONFIG_READ",
> +# "data": { "device": "virtio-net-pci-0",
> +# "path": "/machine/peripheral/virtio-net-pci-0" },
> +# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
> +##
As for PATCH 4, I'd like to see some guidance on intended use.
> +{ 'event': 'VIRTIO_CONFIG_READ',
> + 'features': [ 'unstable' ],
> + 'data': { '*device': 'str', 'path': 'str' } }
[...]
