On Thu, Aug 09, 2018 at 11:57:53AM +1000, Benjamin Herrenschmidt wrote: > Note: We will still need to implement some custom variant of this > for our secure VMs ... > > Basically we'll need to use the existing bounce bufferring as-is but > the condition will be different, it won't be whether the address is > below a certain limit, it will be *always*.
The conditions are in the dma_capable() helper that the architecture can override (and which powerpc already does override).
