tree 05c7376a7be9a41de27ac60a6b412807c0f09adb
parent 8e0861fa3c4edfc2f30dd4cf4d58d3929f7c1b23
author Alexey Kardashevskiy <aik@ozlabs.ru> 1377679063 +1000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1381472680 +1100

powerpc: add real mode support for dma operations on powernv

The existing TCE machine calls (tce_build and tce_free) only support
virtual mode as they call __raw_writeq for TCE invalidation what
fails in real mode.

This introduces tce_build_rm and tce_free_rm real mode versions
which do mostly the same but use "Store Doubleword Caching Inhibited
Indexed" instruction for TCE invalidation.

This new feature is going to be utilized by real mode support of VFIO.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>