drivers/iommu/Kconfig

   1 # IOMMU_API always gets selected by whoever wants it.
   2 config IOMMU_API
   3         bool
   4
   5 menuconfig IOMMU_SUPPORT
   6         bool "IOMMU Hardware Support"
   7         default y
   8         ---help---
   9           Say Y here if you want to compile device drivers for IO Memory
  10           Management Units into the kernel. These devices usually allow to
  11           remap DMA requests and/or remap interrupts from other devices on the
  12           system.
  13
  14 if IOMMU_SUPPORT
  15
  16 # MSM IOMMU support
  17 config MSM_IOMMU
  18         bool "MSM IOMMU Support"
  19         depends on ARCH_MSM8X60 || ARCH_MSM8960
  20         select IOMMU_API
  21         help
  22           Support for the IOMMUs found on certain Qualcomm SOCs.
  23           These IOMMUs allow virtualization of the address space used by most
  24           cores within the multimedia subsystem.
  25
  26           If unsure, say N here.
  27
  28 config IOMMU_PGTABLES_L2
  29         def_bool y
  30         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  31
  32 # AMD IOMMU support
  33 config AMD_IOMMU
  34         bool "AMD IOMMU support"
  35         select SWIOTLB
  36         select PCI_MSI
  37         select PCI_ATS
  38         select PCI_PRI
  39         select PCI_PASID
  40         select IOMMU_API
  41         depends on X86_64 && PCI && ACPI
  42         ---help---
  43           With this option you can enable support for AMD IOMMU hardware in
  44           your system. An IOMMU is a hardware component which provides
  45           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  46           can isolate the the DMA memory of different devices and protect the
  47           system from misbehaving device drivers or hardware.
  48
  49           You can find out if your system has an AMD IOMMU if you look into
  50           your BIOS for an option to enable it or if you have an IVRS ACPI
  51           table.
  52
  53 config AMD_IOMMU_STATS
  54         bool "Export AMD IOMMU statistics to debugfs"
  55         depends on AMD_IOMMU
  56         select DEBUG_FS
  57         ---help---
  58           This option enables code in the AMD IOMMU driver to collect various
  59           statistics about whats happening in the driver and exports that
  60           information to userspace via debugfs.
  61           If unsure, say N.
  62
  63 config AMD_IOMMU_V2
  64         tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
  65         depends on AMD_IOMMU && PROFILING && EXPERIMENTAL
  66         select MMU_NOTIFIER
  67         ---help---
  68           This option enables support for the AMD IOMMUv2 features of the IOMMU
  69           hardware. Select this option if you want to use devices that support
  70           the the PCI PRI and PASID interface.
  71
  72 # Intel IOMMU support
  73 config DMAR_TABLE
  74         bool
  75
  76 config INTEL_IOMMU
  77         bool "Support for Intel IOMMU using DMA Remapping Devices"
  78         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
  79         select IOMMU_API
  80         select DMAR_TABLE
  81         help
  82           DMA remapping (DMAR) devices support enables independent address
  83           translations for Direct Memory Access (DMA) from devices.
  84           These DMA remapping devices are reported via ACPI tables
  85           and include PCI device scope covered by these DMA
  86           remapping devices.
  87
  88 config INTEL_IOMMU_DEFAULT_ON
  89         def_bool y
  90         prompt "Enable Intel DMA Remapping Devices by default"
  91         depends on INTEL_IOMMU
  92         help
  93           Selecting this option will enable a DMAR device at boot time if
  94           one is found. If this option is not selected, DMAR support can
  95           be enabled by passing intel_iommu=on to the kernel.
  96
  97 config INTEL_IOMMU_BROKEN_GFX_WA
  98         bool "Workaround broken graphics drivers (going away soon)"
  99         depends on INTEL_IOMMU && BROKEN && X86
 100         ---help---
 101           Current Graphics drivers tend to use physical address
 102           for DMA and avoid using DMA APIs. Setting this config
 103           option permits the IOMMU driver to set a unity map for
 104           all the OS-visible memory. Hence the driver can continue
 105           to use physical addresses for DMA, at least until this
 106           option is removed in the 2.6.32 kernel.
 107
 108 config INTEL_IOMMU_FLOPPY_WA
 109         def_bool y
 110         depends on INTEL_IOMMU && X86
 111         ---help---
 112           Floppy disk drivers are known to bypass DMA API calls
 113           thereby failing to work when IOMMU is enabled. This
 114           workaround will setup a 1:1 mapping for the first
 115           16MiB to make floppy (an ISA device) work.
 116
 117 config IRQ_REMAP
 118         bool "Support for Interrupt Remapping (EXPERIMENTAL)"
 119         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
 120         select DMAR_TABLE
 121         ---help---
 122           Supports Interrupt remapping for IO-APIC and MSI devices.
 123           To use x2apic mode in the CPU's which support x2APIC enhancements or
 124           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 125
 126 # OMAP IOMMU support
 127 config OMAP_IOMMU
 128         bool "OMAP IOMMU Support"
 129         depends on ARCH_OMAP
 130         select IOMMU_API
 131
 132 config OMAP_IOVMM
 133         tristate "OMAP IO Virtual Memory Manager Support"
 134         depends on OMAP_IOMMU
 135
 136 config OMAP_IOMMU_DEBUG
 137        tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
 138        depends on OMAP_IOVMM && DEBUG_FS
 139        help
 140          Select this to see extensive information about
 141          the internal state of OMAP IOMMU/IOVMM in debugfs.
 142
 143          Say N unless you know you need this.
 144
 145 config TEGRA_IOMMU_GART
 146         bool "Tegra GART IOMMU Support"
 147         depends on ARCH_TEGRA_2x_SOC
 148         select IOMMU_API
 149         help
 150           Enables support for remapping discontiguous physical memory
 151           shared with the operating system into contiguous I/O virtual
 152           space through the GART (Graphics Address Relocation Table)
 153           hardware included on Tegra SoCs.
 154
 155 config TEGRA_IOMMU_SMMU
 156         bool "Tegra SMMU IOMMU Support"
 157         depends on ARCH_TEGRA_3x_SOC
 158         select IOMMU_API
 159         help
 160           Enables support for remapping discontiguous physical memory
 161           shared with the operating system into contiguous I/O virtual
 162           space through the SMMU (System Memory Management Unit)
 163           hardware included on Tegra SoCs.
 164
 165 endif # IOMMU_SUPPORT