pasemi_mac: enable iommu support
pasemi_mac: enable iommu support
Enable IOMMU support for pasemi_mac, but avoid using it on non-partitioned
systems for performance reasons.
The user can override this by selecting the PPC_PASEMI_IOMMU_DMA_FORCE
configuration option.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/arch/powerpc/platforms/pasemi/Kconfig b/arch/powerpc/platforms/pasemi/Kconfig
index 95cd90f..e95261e 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -18,6 +18,16 @@
help
IOMMU support for PA6T-1682M
+config PPC_PASEMI_IOMMU_DMA_FORCE
+ bool "Force DMA engine to use IOMMU"
+ depends on PPC_PASEMI_IOMMU
+ help
+ This option forces the use of the IOMMU also for the
+ DMA engine. Otherwise the kernel will use it only when
+ running under a hypervisor.
+
+ If in doubt, say "N".
+
config PPC_PASEMI_MDIO
depends on PHYLIB
tristate "MDIO support via GPIO"