[RFC 02/10] vhost: add 3 commands for vhost-vdpa

[Longpeng(Mike)]

From: Longpeng <longpeng2@huawei.com>

To support generic vdpa deivce, we need add the following ioctls:
- GET_VECTORS_NUM: the count of vectors that supported
- GET_CONFIG_SIZE: the size of the virtio config space
- GET_VQS_NUM: the count of virtqueues that exported

Signed-off-by: Longpeng <longpeng2@huawei.com>
---
 linux-headers/linux/vhost.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h
index c998860d7b..c5edd75d15 100644
--- a/linux-headers/linux/vhost.h
+++ b/linux-headers/linux/vhost.h
@@ -150,4 +150,14 @@
 /* Get the valid iova range */
 #define VHOST_VDPA_GET_IOVA_RANGE      _IOR(VHOST_VIRTIO, 0x78, \
                                             struct vhost_vdpa_iova_range)
+
+/* Get the number of vectors */
+#define VHOST_VDPA_GET_VECTORS_NUM     _IOR(VHOST_VIRTIO, 0x79, int)
+
+/* Get the virtio config size */
+#define VHOST_VDPA_GET_CONFIG_SIZE     _IOR(VHOST_VIRTIO, 0x80, int)
+
+/* Get the number of virtqueues */
+#define VHOST_VDPA_GET_VQS_NUM         _IOR(VHOST_VIRTIO, 0x81, int)
+
 #endif
-- 
2.23.0