x86: amd_iommu: move to drivers/iommu/

This should ease finding similarities with different platforms,
with the intention of solving problems once in a generic framework
which everyone can use.

Compile-tested on x86_64.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

5 files changed, 31 insertions, 29 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 460d57370016..1b6a2e212db4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -680,34 +680,6 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
           Calgary anyway, pass 'iommu=calgary' on the kernel command line.
           If unsure, say Y.
 
-config AMD_IOMMU
-        bool "AMD IOMMU support"
-        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
-          your system. An IOMMU is a hardware component which provides
-          remapping of DMA memory accesses from devices. With an AMD IOMMU you
-          can isolate the the DMA memory of different devices and protect the
-          system from misbehaving device drivers or hardware.
-
-          You can find out if your system has an AMD IOMMU if you look into
-          your BIOS for an option to enable it or if you have an IVRS ACPI
-          table.
-
-config AMD_IOMMU_STATS
-        bool "Export AMD IOMMU statistics to debugfs"
-        depends on AMD_IOMMU
-        select DEBUG_FS
-        ---help---
-          This option enables code in the AMD IOMMU driver to collect various
-          statistics about whats happening in the driver and exports that
-          information to userspace via debugfs.
-          If unsure, say N.
-
 # need this always selected by IOMMU for the VIA workaround
 config SWIOTLB
         def_bool y if X86_64
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 90b06d4daee2..aef02989c930 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -123,7 +123,7 @@ ifeq ($(CONFIG_X86_64),y)
 
         obj-$(CONFIG_GART_IOMMU)        += amd_gart_64.o aperture_64.o
         obj-$(CONFIG_CALGARY_IOMMU)     += pci-calgary_64.o tce_64.o
-        obj-$(CONFIG_AMD_IOMMU)         += amd_iommu_init.o amd_iommu.o
+        obj-$(CONFIG_AMD_IOMMU)         += amd_iommu_init.o
 
         obj-$(CONFIG_PCI_MMCONFIG)      += mmconf-fam10h_64.o
         obj-y                           += vsmp_64.o
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 21a80bfbdb52..9246c5bf25af 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -17,3 +17,32 @@ config MSM_IOMMU
 config IOMMU_PGTABLES_L2
         def_bool y
         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
+
+# AMD IOMMU support
+config AMD_IOMMU
+        bool "AMD IOMMU support"
+        select SWIOTLB
+        select PCI_MSI
+        select PCI_IOV
+        select IOMMU_API
+        depends on X86_64 && PCI && ACPI
+        ---help---
+          With this option you can enable support for AMD IOMMU hardware in
+          your system. An IOMMU is a hardware component which provides
+          remapping of DMA memory accesses from devices. With an AMD IOMMU you
+          can isolate the the DMA memory of different devices and protect the
+          system from misbehaving device drivers or hardware.
+
+          You can find out if your system has an AMD IOMMU if you look into
+          your BIOS for an option to enable it or if you have an IVRS ACPI
+          table.
+
+config AMD_IOMMU_STATS
+        bool "Export AMD IOMMU statistics to debugfs"
+        depends on AMD_IOMMU
+        select DEBUG_FS
+        ---help---
+          This option enables code in the AMD IOMMU driver to collect various
+          statistics about whats happening in the driver and exports that
+          information to userspace via debugfs.
+          If unsure, say N.
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 1a71c82b1af2..4237eaf84609 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_IOMMU_API) += iommu.o
 obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
+obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o
diff --git a/arch/x86/kernel/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 7c3a95e54ec5..7c3a95e54ec5 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c