[PATCH V2 6/8] mdev: introduce virtio device and its device ops

[Jason Wang]

On 2019/9/26 下午4:21, Michael S. Tsirkin wrote:
> On Thu, Sep 26, 2019 at 12:04:46PM +0800, Jason Wang wrote:
>>>>> I'm not sure how stable above ops are.
>>>> It's the kernel internal API, so there's no strict requirement for this. We
>>>> will export a version value for userspace for compatibility.
>>> Given it's tied to virtio we probably want kernel+userspace
>>> feature bits?
>>
>> Yes, then I think we could probably have a version field inside e.g
>> device_ops structure. Then it could be fetched from both kernel and
>> userspace driver.
>>
>> Thanks
>>
>
> my point was feature bits not a version number.


Something like backend_feature that current vhost_net did?

Thanks


>