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>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 460d573..1b6a2e2 100644 (file)
--- 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 90b06d4..aef0298 100644 (file)
--- 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 21a80bf..9246c5b 100644 (file)
--- 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 1a71c82..4237eaf 100644 (file)
--- 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
similarity index 100%
rename from arch/x86/kernel/amd_iommu.c
rename to drivers/iommu/amd_iommu.c