3 files changed, 20 insertions, 0 deletions

diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 9c19f5b634..1e62f869b2 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -38,6 +38,7 @@ struct VirtIOBlkConf
     uint32_t request_merging;
     uint16_t num_queues;
     uint16_t queue_size;
+    bool seg_max_adjust;
     uint32_t max_discard_sectors;
     uint32_t max_write_zeroes_sectors;
     bool x_enable_wce_if_config_wce;
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 122f7c4b6f..24e768909d 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -48,6 +48,7 @@ typedef struct virtio_scsi_config VirtIOSCSIConfig;
 struct VirtIOSCSIConf {
     uint32_t num_queues;
     uint32_t virtqueue_size;
+    bool seg_max_adjust;
     uint32_t max_sectors;
     uint32_t cmd_per_lun;
 #ifdef CONFIG_VHOST_SCSI
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index c32a815303..b69d517496 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -100,6 +100,8 @@ struct VirtIODevice
     uint16_t device_id;
     bool vm_running;
     bool broken; /* device in invalid state, needs reset */
+    bool use_disabled_flag; /* allow use of 'disable' flag when needed */
+    bool disabled; /* device in temporarily disabled state */
     bool use_started;
     bool started;
     bool start_on_kick; /* when virtio 1.0 feature has not been negotiated */
@@ -183,6 +185,8 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
 
 void virtio_del_queue(VirtIODevice *vdev, int n);
 
+void virtio_delete_queue(VirtQueue *vq);
+
 void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
                     unsigned int len);
 void virtqueue_flush(VirtQueue *vq, unsigned int count);
@@ -224,6 +228,7 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id);
 
 void virtio_notify_config(VirtIODevice *vdev);
 
+bool virtio_queue_get_notification(VirtQueue *vq);
 void virtio_queue_set_notification(VirtQueue *vq, int enable);
 
 int virtio_queue_ready(VirtQueue *vq);
@@ -378,4 +383,17 @@ static inline void virtio_set_started(VirtIODevice *vdev, bool started)
         vdev->started = started;
     }
 }
+
+static inline void virtio_set_disabled(VirtIODevice *vdev, bool disable)
+{
+    if (vdev->use_disabled_flag) {
+        vdev->disabled = disable;
+    }
+}
+
+static inline bool virtio_device_disabled(VirtIODevice *vdev)
+{
+    return unlikely(vdev->disabled || vdev->broken);
+}
+
 #endif