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qmp: add QMP command x-query-virtio-status

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This new command shows the status of a VirtIODevice, including
its corresponding vhost device's status (if active).

Next patch will improve output by decoding feature bits, including
vhost device's feature bits (backend, protocol, acked, and features).
Also will decode status bits of a VirtIODevice.

[Jonah: From patch v12; added a check to @virtio_device_find to ensure
 synchronicity between @virtio_list and the devices in the QOM
 composition tree.]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-3-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Laurent Vivier 2022-08-11 08:24:40 -04:00 • committed by Michael S. Tsirkin
parent a5ebce3857
commit 90c066cd68
3 changed files with 331 additions and 0 deletions
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5
hw/virtio/virtio-stub.c
View file

@ -12,3 +12,8 @@ VirtioInfoList *qmp_x_query_virtio(Error **errp)
{
return qmp_virtio_unsupported(errp);
}
VirtioStatus *qmp_x_query_virtio_status(const char *path, Error **errp)
{
return qmp_virtio_unsupported(errp);
}