[Qemu-devel] [PATCH v4 1/7] virtio-blk: add VirtIOBlockConf->num_queues

[Stefan Hajnoczi <stefanha@redhat.com>]

The num_queues field is always 1 for the time being.  A later patch will
make it a configurable device property so that multiqueue can be
enabled.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/block/virtio-blk.c          | 1 +
 include/hw/virtio/virtio-blk.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 284e646..0df7b35 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -888,6 +888,7 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     s->rq = NULL;
     s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1;
 
+    conf->num_queues = 1;
     s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
     virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err);
     if (err != NULL) {
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 8f2b056..9b03b6a 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -38,6 +38,7 @@ struct VirtIOBlkConf
     uint32_t scsi;
     uint32_t config_wce;
     uint32_t request_merging;
+    uint16_t num_queues;
 };
 
 struct VirtIOBlockDataPlane;
-- 
2.5.5