iommu: Allow building iova.c independently

In preparation for sharing the IOVA allocator, split it out under its
own Kconfig symbol.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 325188eef1c1..a839ca93376b 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -13,6 +13,9 @@ menuconfig IOMMU_SUPPORT
 
 if IOMMU_SUPPORT
 
+config IOMMU_IOVA
+        bool
+
 config OF_IOMMU
        def_bool y
        depends on OF && IOMMU_API
@@ -91,6 +94,7 @@ config INTEL_IOMMU
         bool "Support for Intel IOMMU using DMA Remapping Devices"
         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
         select IOMMU_API
+        select IOMMU_IOVA
         select DMAR_TABLE
         help
           DMA remapping (DMAR) devices support enables independent address