On 2019/9/25 上午7:06, Alex Williamson wrote:

On Tue, 24 Sep 2019 21:53:30 +0800
Jason Wang[off-list ref]  wrote:

quoted

This patch implements basic support for mdev driver that supports
virtio transport for kernel virtio driver.

Signed-off-by: Jason Wang<jasowang@redhat.com>
---
  include/linux/mdev.h        |   2 +
  include/linux/virtio_mdev.h | 145 ++++++++++++++++++++++++++++++++++++
  2 files changed, 147 insertions(+)
  create mode 100644 include/linux/virtio_mdev.h

diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 3414307311f1..73ac27b3b868 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h

@@ -126,6 +126,8 @@ struct mdev_device *mdev_from_dev(struct device *dev);
  
  enum {
  	MDEV_ID_VFIO = 1,
+	MDEV_ID_VIRTIO = 2,
+	MDEV_ID_VHOST = 3,

MDEV_ID_VHOST isn't used yet here.  Also, given the strong
interdependence between the class_id and the ops structure, we might
wand to define them in the same place.  Thanks,

Alex

Rethink about this, consider we may have more types of devices supported 
in the future, moving all device_ops to mdev.h seems unnecessary. I 
prefer to keep the device_ops into their own headers.

Thanks