Re: [v3 0/5] plumb kvm/vfio to allow getting kvm from vfio_group

[Xiao Guangrong <guangrong.xiao@linux.intel.com>]

On 10/31/2016 02:35 PM, Jike Song wrote:
> So far KVM and VFIO are mostly transparent to each other.
> However, there are users who would rely on them both. For
> example, KVMGT relies on VFIO to mediate device operations,
> and it also relies on KVM for features such as guest page
> tracking. To do that, it needs to know which KVM instance
> a vfio_group is attached to.
>
> There is already a kvm_vfio device serving for similar purpose,
> this patchset extend it to allow external usrs like KVMGT to
> get KVM instance from the vfio_group.
>
>
> I picked one of Kirti's patchset from:
>
> 	https://lkml.org/lkml/2016/10/26/1119
>
> for the function to get the vfio_group from a given device.
>
>
> Changes v3:
> 	- don't touch kvm_put_kvm, vfio won't need it

Do not understand. vfio does not use it indeed, however, the
user of udata, i.e, KVMGT, should put kvm after vfio_group_get_kvm().