9 files changed, 9 insertions, 10 deletions

diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 1516896e8d17..efb7b7dfc20b 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -205,9 +205,6 @@ config MSM_GPIOMUX
 config MSM_V2_TLMM
         bool
 
-config IOMMU_API
-        bool
-
 config MSM_SCM
         bool
 endif
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 38280ef4a2af..9929e4e11ea0 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -681,6 +681,3 @@ source "lib/Kconfig"
 
 config IOMMU_HELPER
         def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
-
-config IOMMU_API
-        def_bool (DMAR)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index da349723d411..460d57370016 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -685,6 +685,7 @@ config AMD_IOMMU
         select SWIOTLB
         select PCI_MSI
         select PCI_IOV
+        select IOMMU_API
         depends on X86_64 && PCI && ACPI
         ---help---
           With this option you can enable support for AMD IOMMU hardware in
@@ -720,9 +721,6 @@ config SWIOTLB
 config IOMMU_HELPER
         def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
 
-config IOMMU_API
-        def_bool (AMD_IOMMU || DMAR)
-
 config MAXSMP
         bool "Enable Maximum number of SMP Processors and NUMA Nodes"
         depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
@@ -1945,6 +1943,7 @@ config PCI_CNB20LE_QUIRK
 config DMAR
         bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
         depends on PCI_MSI && ACPI && EXPERIMENTAL
+        select IOMMU_API
         help
           DMA remapping (DMAR) devices support enables independent address
           translations for Direct Memory Access (DMA) from devices.
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 3bb154d8c8cc..9d513188b47a 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -126,4 +126,6 @@ source "drivers/hwspinlock/Kconfig"
 
 source "drivers/clocksource/Kconfig"
 
+source "drivers/iommu/Kconfig"
+
 endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index 09f3232bcdcd..2f7a71a933de 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -122,3 +122,4 @@ obj-y				+= ieee802154/
 obj-y                           += clk/
 
 obj-$(CONFIG_HWSPINLOCK)        += hwspinlock/
+obj-$(CONFIG_IOMMU_API)         += iommu/
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 4c5701c15f53..5ab0d07c4578 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -13,7 +13,6 @@ obj-$(CONFIG_FW_LOADER)	+= firmware_class.o
 obj-$(CONFIG_NUMA)      += node.o
 obj-$(CONFIG_MEMORY_HOTPLUG_SPARSE) += memory.o
 obj-$(CONFIG_SMP)       += topology.o
-obj-$(CONFIG_IOMMU_API) += iommu.o
 ifeq ($(CONFIG_SYSFS),y)
 obj-$(CONFIG_MODULES)   += module.o
 endif
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
new file mode 100644
index 000000000000..2c5dfb48a22a
--- /dev/null
+++ b/drivers/iommu/Kconfig
@@ -0,0 +1,3 @@
+# IOMMU_API always gets selected by whoever wants it.
+config IOMMU_API
+        bool
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
new file mode 100644
index 000000000000..241ba4c46a19
--- /dev/null
+++ b/drivers/iommu/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_IOMMU_API) += iommu.o
diff --git a/drivers/base/iommu.c b/drivers/iommu/iommu.c
index 6e6b6a11b3ce..6e6b6a11b3ce 100644
--- a/drivers/base/iommu.c
+++ b/drivers/iommu/iommu.c