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2022-10-09qmp: add QMP command x-query-virtio-queue-elementLaurent Vivier
This new command shows the information of a VirtQueue element. [Note: Up until v10 of this patch series, virtio.json had many (15+) enums defined (e.g. decoded device features, statuses, etc.). In v10 most of these enums were removed and replaced with string literals. By doing this we get (1) simpler schema, (2) smaller generated code, and (3) less maintenance burden for when new things are added (e.g. devices, device features, etc.).] Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com> Message-Id: <1660220684-24909-6-git-send-email-jonah.palmer@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09qmp: add QMP commands for virtio/vhost queue-statusLaurent Vivier
These new commands show the internal status of a VirtIODevice's VirtQueue and a vhost device's vhost_virtqueue (if active). Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com> Message-Id: <1660220684-24909-5-git-send-email-jonah.palmer@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09qmp: add QMP command x-query-virtio-statusLaurent Vivier
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>
2022-10-09qmp: add QMP command x-query-virtioLaurent Vivier
This new command lists all the instances of VirtIODevices with their canonical QOM path and name. [Jonah: @virtio_list duplicates information that already exists in the QOM composition tree. However, extracting necessary information from this tree seems to be a bit convoluted. Instead, we still create our own list of realized virtio devices but use @qmp_qom_get with the device's canonical QOM path to confirm that the device exists and is realized. If the device exists but is actually not realized, then we remove it from our list (for synchronicity to the QOM composition tree). Also, the QMP command @x-query-virtio is redundant as @qom-list and @qom-get are sufficient to search '/machine/' for realized virtio devices. However, @x-query-virtio is much more convenient in listing realized virtio devices.] Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com> Message-Id: <1660220684-24909-2-git-send-email-jonah.palmer@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>