select IOMMU_API when DMAR and/or AMD_IOMMU is selected

These two IOMMUs can implement the current version of this API. So
select the API if one or both of these IOMMU drivers is selected.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

3 files changed, 7 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 7fa8f615ba6e..3d31636cbafb 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -687,3 +687,6 @@ config IRQ_PER_CPU
 
 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 249d1e0824b5..4737435b00d4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -599,6 +599,9 @@ 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 "Configure Maximum number of SMP Processors and NUMA Nodes"
         depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index c66637392bbc..b5b8ba512b28 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -11,6 +11,7 @@ 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