iommu/amd: Add driver stub for AMD IOMMUv2 support

Add a Kconfig option for the optional driver. Since it is
optional it can be compiled as a module and will only be
loaded when required by another driver.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 220dfc24b311..e608a36bb0b1 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -60,6 +60,14 @@ config AMD_IOMMU_STATS
           information to userspace via debugfs.
           If unsure, say N.
 
+config AMD_IOMMU_V2
+        tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
+        depends on AMD_IOMMU && EXPERIMENTAL
+        ---help---
+          This option enables support for the AMD IOMMUv2 features of the IOMMU
+          hardware. Select this option if you want to use devices that support
+          the the PCI PRI and PASID interface.
+
 # Intel IOMMU support
 config DMAR_TABLE
         bool