Prepare for supporting mutli vqs per virtio-blk device.
Signed-off-by: Ming Lei <ming....@canonical.com>
---
include/hw/virtio/virtio-blk.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 45f8894..ad70c9a 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -42,6 +42,12 @@
#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
#define VIRTIO_BLK_F_CONFIG_WCE 11 /* write cache configurable */
+/*
+ * support multi vqs, and virtio_blk_config.num_queues is only
+ * available when this feature is enabled
+ */
+#define VIRTIO_BLK_F_MQ 12
+
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
struct virtio_blk_config
@@ -58,6 +64,8 @@ struct virtio_blk_config
uint16_t min_io_size;
uint32_t opt_io_size;
uint8_t wce;
+ uint8_t unused;
+ uint16_t num_queues; /* must be at the end */
} QEMU_PACKED;
/* These two define direction. */
--
1.7.9.5
