Re: [PATCH v11 11/12] vduse: Introduce VDUSE - vDPA Device in Userspace

[Yongji Xie <xieyongji@bytedance.com>]

On Wed, Aug 25, 2021 at 2:10 AM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Wed, Aug 18, 2021 at 08:06:41PM +0800, Xie Yongji wrote:
> > This VDUSE driver enables implementing software-emulated vDPA
> > devices in userspace. The vDPA device is created by
> > ioctl(VDUSE_CREATE_DEV) on /dev/vduse/control. Then a char device
> > interface (/dev/vduse/$NAME) is exported to userspace for device
> > emulation.
> >
> > In order to make the device emulation more secure, the device's
> > control path is handled in kernel. A message mechnism is introduced
> > to forward some dataplane related control messages to userspace.
> >
> > And in the data path, the DMA buffer will be mapped into userspace
> > address space through different ways depending on the vDPA bus to
> > which the vDPA device is attached. In virtio-vdpa case, the MMU-based
> > software IOTLB is used to achieve that. And in vhost-vdpa case, the
> > DMA buffer is reside in a userspace memory region which can be shared
> > to the VDUSE userspace processs via transferring the shmfd.
> >
> > For more details on VDUSE design and usage, please see the follow-on
> > Documentation commit.
> >
> > Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
>
> Build bot seems unhappy with this patch.
>

Yes, this is because the series relies on the unmerged patch:

https://lore.kernel.org/lkml/20210705071910.31965-1-jasowang@redhat.com/

Do I need to remove this dependency in the next version?

Thanks,
Yongji