linux/drivers/iommu/Kconfig
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   1# IOMMU_API always gets selected by whoever wants it.
   2config IOMMU_API
   3        bool
   4
   5menuconfig 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
  14if IOMMU_SUPPORT
  15
  16config OF_IOMMU
  17       def_bool y
  18       depends on OF
  19
  20config FSL_PAMU
  21        bool "Freescale IOMMU support"
  22        depends on PPC_E500MC
  23        select IOMMU_API
  24        select GENERIC_ALLOCATOR
  25        help
  26          Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  27          PAMU can authorize memory access, remap the memory address, and remap I/O
  28          transaction types.
  29
  30# MSM IOMMU support
  31config MSM_IOMMU
  32        bool "MSM IOMMU Support"
  33        depends on ARCH_MSM8X60 || ARCH_MSM8960
  34        select IOMMU_API
  35        help
  36          Support for the IOMMUs found on certain Qualcomm SOCs.
  37          These IOMMUs allow virtualization of the address space used by most
  38          cores within the multimedia subsystem.
  39
  40          If unsure, say N here.
  41
  42config IOMMU_PGTABLES_L2
  43        def_bool y
  44        depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  45
  46# AMD IOMMU support
  47config AMD_IOMMU
  48        bool "AMD IOMMU support"
  49        select SWIOTLB
  50        select PCI_MSI
  51        select PCI_ATS
  52        select PCI_PRI
  53        select PCI_PASID
  54        select IOMMU_API
  55        depends on X86_64 && PCI && ACPI
  56        ---help---
  57          With this option you can enable support for AMD IOMMU hardware in
  58          your system. An IOMMU is a hardware component which provides
  59          remapping of DMA memory accesses from devices. With an AMD IOMMU you
  60          can isolate the DMA memory of different devices and protect the
  61          system from misbehaving device drivers or hardware.
  62
  63          You can find out if your system has an AMD IOMMU if you look into
  64          your BIOS for an option to enable it or if you have an IVRS ACPI
  65          table.
  66
  67config AMD_IOMMU_STATS
  68        bool "Export AMD IOMMU statistics to debugfs"
  69        depends on AMD_IOMMU
  70        select DEBUG_FS
  71        ---help---
  72          This option enables code in the AMD IOMMU driver to collect various
  73          statistics about whats happening in the driver and exports that
  74          information to userspace via debugfs.
  75          If unsure, say N.
  76
  77config AMD_IOMMU_V2
  78        tristate "AMD IOMMU Version 2 driver"
  79        depends on AMD_IOMMU && PROFILING
  80        select MMU_NOTIFIER
  81        ---help---
  82          This option enables support for the AMD IOMMUv2 features of the IOMMU
  83          hardware. Select this option if you want to use devices that support
  84          the PCI PRI and PASID interface.
  85
  86# Intel IOMMU support
  87config DMAR_TABLE
  88        bool
  89
  90config INTEL_IOMMU
  91        bool "Support for Intel IOMMU using DMA Remapping Devices"
  92        depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
  93        select IOMMU_API
  94        select DMAR_TABLE
  95        help
  96          DMA remapping (DMAR) devices support enables independent address
  97          translations for Direct Memory Access (DMA) from devices.
  98          These DMA remapping devices are reported via ACPI tables
  99          and include PCI device scope covered by these DMA
 100          remapping devices.
 101
 102config INTEL_IOMMU_DEFAULT_ON
 103        def_bool y
 104        prompt "Enable Intel DMA Remapping Devices by default"
 105        depends on INTEL_IOMMU
 106        help
 107          Selecting this option will enable a DMAR device at boot time if
 108          one is found. If this option is not selected, DMAR support can
 109          be enabled by passing intel_iommu=on to the kernel.
 110
 111config INTEL_IOMMU_BROKEN_GFX_WA
 112        bool "Workaround broken graphics drivers (going away soon)"
 113        depends on INTEL_IOMMU && BROKEN && X86
 114        ---help---
 115          Current Graphics drivers tend to use physical address
 116          for DMA and avoid using DMA APIs. Setting this config
 117          option permits the IOMMU driver to set a unity map for
 118          all the OS-visible memory. Hence the driver can continue
 119          to use physical addresses for DMA, at least until this
 120          option is removed in the 2.6.32 kernel.
 121
 122config INTEL_IOMMU_FLOPPY_WA
 123        def_bool y
 124        depends on INTEL_IOMMU && X86
 125        ---help---
 126          Floppy disk drivers are known to bypass DMA API calls
 127          thereby failing to work when IOMMU is enabled. This
 128          workaround will setup a 1:1 mapping for the first
 129          16MiB to make floppy (an ISA device) work.
 130
 131config IRQ_REMAP
 132        bool "Support for Interrupt Remapping"
 133        depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 134        select DMAR_TABLE
 135        ---help---
 136          Supports Interrupt remapping for IO-APIC and MSI devices.
 137          To use x2apic mode in the CPU's which support x2APIC enhancements or
 138          to support platforms with CPU's having > 8 bit APIC ID, say Y.
 139
 140# OMAP IOMMU support
 141config OMAP_IOMMU
 142        bool "OMAP IOMMU Support"
 143        depends on ARCH_OMAP2PLUS
 144        select IOMMU_API
 145
 146config OMAP_IOVMM
 147        tristate "OMAP IO Virtual Memory Manager Support"
 148        depends on OMAP_IOMMU
 149
 150config OMAP_IOMMU_DEBUG
 151       tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
 152       depends on OMAP_IOVMM && DEBUG_FS
 153       help
 154         Select this to see extensive information about
 155         the internal state of OMAP IOMMU/IOVMM in debugfs.
 156
 157         Say N unless you know you need this.
 158
 159config TEGRA_IOMMU_GART
 160        bool "Tegra GART IOMMU Support"
 161        depends on ARCH_TEGRA_2x_SOC
 162        select IOMMU_API
 163        help
 164          Enables support for remapping discontiguous physical memory
 165          shared with the operating system into contiguous I/O virtual
 166          space through the GART (Graphics Address Relocation Table)
 167          hardware included on Tegra SoCs.
 168
 169config TEGRA_IOMMU_SMMU
 170        bool "Tegra SMMU IOMMU Support"
 171        depends on ARCH_TEGRA && TEGRA_AHB
 172        select IOMMU_API
 173        help
 174          Enables support for remapping discontiguous physical memory
 175          shared with the operating system into contiguous I/O virtual
 176          space through the SMMU (System Memory Management Unit)
 177          hardware included on Tegra SoCs.
 178
 179config EXYNOS_IOMMU
 180        bool "Exynos IOMMU Support"
 181        depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
 182        select IOMMU_API
 183        help
 184          Support for the IOMMU(System MMU) of Samsung Exynos application
 185          processor family. This enables H/W multimedia accellerators to see
 186          non-linear physical memory chunks as a linear memory in their
 187          address spaces
 188
 189          If unsure, say N here.
 190
 191config EXYNOS_IOMMU_DEBUG
 192        bool "Debugging log for Exynos IOMMU"
 193        depends on EXYNOS_IOMMU
 194        help
 195          Select this to see the detailed log message that shows what
 196          happens in the IOMMU driver
 197
 198          Say N unless you need kernel log message for IOMMU debugging
 199
 200config SHMOBILE_IPMMU
 201        bool
 202
 203config SHMOBILE_IPMMU_TLB
 204        bool
 205
 206config SHMOBILE_IOMMU
 207        bool "IOMMU for Renesas IPMMU/IPMMUI"
 208        default n
 209        depends on (ARM && ARCH_SHMOBILE)
 210        select IOMMU_API
 211        select ARM_DMA_USE_IOMMU
 212        select SHMOBILE_IPMMU
 213        select SHMOBILE_IPMMU_TLB
 214        help
 215          Support for Renesas IPMMU/IPMMUI. This option enables
 216          remapping of DMA memory accesses from all of the IP blocks
 217          on the ICB.
 218
 219          Warning: Drivers (including userspace drivers of UIO
 220          devices) of the IP blocks on the ICB *must* use addresses
 221          allocated from the IPMMU (iova) for DMA with this option
 222          enabled.
 223
 224          If unsure, say N.
 225
 226choice
 227        prompt "IPMMU/IPMMUI address space size"
 228        default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 229        depends on SHMOBILE_IOMMU
 230        help
 231          This option sets IPMMU/IPMMUI address space size by
 232          adjusting the 1st level page table size. The page table size
 233          is calculated as follows:
 234
 235              page table size = number of page table entries * 4 bytes
 236              number of page table entries = address space size / 1 MiB
 237
 238          For example, when the address space size is 2048 MiB, the
 239          1st level page table size is 8192 bytes.
 240
 241        config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 242                bool "2 GiB"
 243
 244        config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 245                bool "1 GiB"
 246
 247        config SHMOBILE_IOMMU_ADDRSIZE_512MB
 248                bool "512 MiB"
 249
 250        config SHMOBILE_IOMMU_ADDRSIZE_256MB
 251                bool "256 MiB"
 252
 253        config SHMOBILE_IOMMU_ADDRSIZE_128MB
 254                bool "128 MiB"
 255
 256        config SHMOBILE_IOMMU_ADDRSIZE_64MB
 257                bool "64 MiB"
 258
 259        config SHMOBILE_IOMMU_ADDRSIZE_32MB
 260                bool "32 MiB"
 261
 262endchoice
 263
 264config SHMOBILE_IOMMU_L1SIZE
 265        int
 266        default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 267        default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 268        default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 269        default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 270        default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 271        default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 272        default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 273
 274config SPAPR_TCE_IOMMU
 275        bool "sPAPR TCE IOMMU Support"
 276        depends on PPC_POWERNV || PPC_PSERIES
 277        select IOMMU_API
 278        help
 279          Enables bits of IOMMU API required by VFIO. The iommu_ops
 280          is not implemented as it is not necessary for VFIO.
 281
 282config ARM_SMMU
 283        bool "ARM Ltd. System MMU (SMMU) Support"
 284        depends on ARM64 || (ARM_LPAE && OF)
 285        select IOMMU_API
 286        select ARM_DMA_USE_IOMMU if ARM
 287        help
 288          Support for implementations of the ARM System MMU architecture
 289          versions 1 and 2. The driver supports both v7l and v8l table
 290          formats with 4k and 64k page sizes.
 291
 292          Say Y here if your SoC includes an IOMMU device implementing
 293          the ARM SMMU architecture.
 294
 295endif # IOMMU_SUPPORT
 296
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