[PATCH] vhost: introduce vDPA based backend

Jason Gunthorpe
Wed, 05 Feb 2020 12:56:48 -0000

On Wed, Feb 05, 2020 at 03:50:14PM +0800, Jason Wang
wrote:
> > Would it be better for the map/umnap logic to happen inside each
device ?
> > Devices that needs the IOMMU will call iommu APIs from inside the
driver callback.
>
> Technically, this can work. But if it can be done by vhost-vpda it will
make
> the vDPA driver more compact and easier to be implemented.

Generally speaking, in the kernel, it is normal to not hoist code of
out drivers into subsystems until 2-3 drivers are duplicating that
code. It helps ensure the right design is used

Jason