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         depends on MMU
   8         default y
   9         ---help---
  10           Say Y here if you want to compile device drivers for IO Memory
  11           Management Units into the kernel. These devices usually allow to
  12           remap DMA requests and/or remap interrupts from other devices on the
  13           system.
  14
  15 if IOMMU_SUPPORT
  16
  17 menu "Generic IOMMU Pagetable Support"
  18
  19 # Selected by the actual pagetable implementations
  20 config IOMMU_IO_PGTABLE
  21         bool
  22
  23 config IOMMU_IO_PGTABLE_LPAE
  24         bool "ARMv7/v8 Long Descriptor Format"
  25         select IOMMU_IO_PGTABLE
  26         depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST)
  27         help
  28           Enable support for the ARM long descriptor pagetable format.
  29           This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
  30           sizes at both stage-1 and stage-2, as well as address spaces
  31           up to 48-bits in size.
  32
  33 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
  34         bool "LPAE selftests"
  35         depends on IOMMU_IO_PGTABLE_LPAE
  36         help
  37           Enable self-tests for LPAE page table allocator. This performs
  38           a series of page-table consistency checks during boot.
  39
  40           If unsure, say N here.
  41
  42 config IOMMU_IO_PGTABLE_ARMV7S
  43         bool "ARMv7/v8 Short Descriptor Format"
  44         select IOMMU_IO_PGTABLE
  45         depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST)
  46         help
  47           Enable support for the ARM Short-descriptor pagetable format.
  48           This supports 32-bit virtual and physical addresses mapped using
  49           2-level tables with 4KB pages/1MB sections, and contiguous entries
  50           for 64KB pages/16MB supersections if indicated by the IOMMU driver.
  51
  52 config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
  53         bool "ARMv7s selftests"
  54         depends on IOMMU_IO_PGTABLE_ARMV7S
  55         help
  56           Enable self-tests for ARMv7s page table allocator. This performs
  57           a series of page-table consistency checks during boot.
  58
  59           If unsure, say N here.
  60
  61 endmenu
  62
  63 config IOMMU_IOVA
  64         tristate
  65
  66 config OF_IOMMU
  67        def_bool y
  68        depends on OF && IOMMU_API
  69
  70 # IOMMU-agnostic DMA-mapping layer
  71 config IOMMU_DMA
  72         bool
  73         select IOMMU_API
  74         select IOMMU_IOVA
  75         select NEED_SG_DMA_LENGTH
  76
  77 config FSL_PAMU
  78         bool "Freescale IOMMU support"
  79         depends on PPC_E500MC || (COMPILE_TEST && PPC)
  80         select IOMMU_API
  81         select GENERIC_ALLOCATOR
  82         help
  83           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  84           PAMU can authorize memory access, remap the memory address, and remap I/O
  85           transaction types.
  86
  87 # MSM IOMMU support
  88 config MSM_IOMMU
  89         bool "MSM IOMMU Support"
  90         depends on ARM
  91         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  92         select IOMMU_API
  93         select IOMMU_IO_PGTABLE_ARMV7S
  94         help
  95           Support for the IOMMUs found on certain Qualcomm SOCs.
  96           These IOMMUs allow virtualization of the address space used by most
  97           cores within the multimedia subsystem.
  98
  99           If unsure, say N here.
 100
 101 config IOMMU_PGTABLES_L2
 102         def_bool y
 103         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 104
 105 # AMD IOMMU support
 106 config AMD_IOMMU
 107         bool "AMD IOMMU support"
 108         select SWIOTLB
 109         select PCI_MSI
 110         select PCI_ATS
 111         select PCI_PRI
 112         select PCI_PASID
 113         select IOMMU_API
 114         select IOMMU_IOVA
 115         depends on X86_64 && PCI && ACPI
 116         ---help---
 117           With this option you can enable support for AMD IOMMU hardware in
 118           your system. An IOMMU is a hardware component which provides
 119           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 120           can isolate the DMA memory of different devices and protect the
 121           system from misbehaving device drivers or hardware.
 122
 123           You can find out if your system has an AMD IOMMU if you look into
 124           your BIOS for an option to enable it or if you have an IVRS ACPI
 125           table.
 126
 127 config AMD_IOMMU_V2
 128         tristate "AMD IOMMU Version 2 driver"
 129         depends on AMD_IOMMU
 130         select MMU_NOTIFIER
 131         ---help---
 132           This option enables support for the AMD IOMMUv2 features of the IOMMU
 133           hardware. Select this option if you want to use devices that support
 134           the PCI PRI and PASID interface.
 135
 136 # Intel IOMMU support
 137 config DMAR_TABLE
 138         bool
 139
 140 config INTEL_IOMMU
 141         bool "Support for Intel IOMMU using DMA Remapping Devices"
 142         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 143         select IOMMU_API
 144         select IOMMU_IOVA
 145         select DMAR_TABLE
 146         help
 147           DMA remapping (DMAR) devices support enables independent address
 148           translations for Direct Memory Access (DMA) from devices.
 149           These DMA remapping devices are reported via ACPI tables
 150           and include PCI device scope covered by these DMA
 151           remapping devices.
 152
 153 config INTEL_IOMMU_SVM
 154         bool "Support for Shared Virtual Memory with Intel IOMMU"
 155         depends on INTEL_IOMMU && X86
 156         select PCI_PASID
 157         select MMU_NOTIFIER
 158         help
 159           Shared Virtual Memory (SVM) provides a facility for devices
 160           to access DMA resources through process address space by
 161           means of a Process Address Space ID (PASID).
 162
 163 config INTEL_IOMMU_DEFAULT_ON
 164         def_bool y
 165         prompt "Enable Intel DMA Remapping Devices by default"
 166         depends on INTEL_IOMMU
 167         help
 168           Selecting this option will enable a DMAR device at boot time if
 169           one is found. If this option is not selected, DMAR support can
 170           be enabled by passing intel_iommu=on to the kernel.
 171
 172 config INTEL_IOMMU_BROKEN_GFX_WA
 173         bool "Workaround broken graphics drivers (going away soon)"
 174         depends on INTEL_IOMMU && BROKEN && X86
 175         ---help---
 176           Current Graphics drivers tend to use physical address
 177           for DMA and avoid using DMA APIs. Setting this config
 178           option permits the IOMMU driver to set a unity map for
 179           all the OS-visible memory. Hence the driver can continue
 180           to use physical addresses for DMA, at least until this
 181           option is removed in the 2.6.32 kernel.
 182
 183 config INTEL_IOMMU_FLOPPY_WA
 184         def_bool y
 185         depends on INTEL_IOMMU && X86
 186         ---help---
 187           Floppy disk drivers are known to bypass DMA API calls
 188           thereby failing to work when IOMMU is enabled. This
 189           workaround will setup a 1:1 mapping for the first
 190           16MiB to make floppy (an ISA device) work.
 191
 192 config IRQ_REMAP
 193         bool "Support for Interrupt Remapping"
 194         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 195         select DMAR_TABLE
 196         ---help---
 197           Supports Interrupt remapping for IO-APIC and MSI devices.
 198           To use x2apic mode in the CPU's which support x2APIC enhancements or
 199           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 200
 201 # OMAP IOMMU support
 202 config OMAP_IOMMU
 203         bool "OMAP IOMMU Support"
 204         depends on ARM && MMU
 205         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 206         select IOMMU_API
 207         ---help---
 208           The OMAP3 media platform drivers depend on iommu support,
 209           if you need them say Y here.
 210
 211 config OMAP_IOMMU_DEBUG
 212         bool "Export OMAP IOMMU internals in DebugFS"
 213         depends on OMAP_IOMMU && DEBUG_FS
 214         ---help---
 215           Select this to see extensive information about
 216           the internal state of OMAP IOMMU in debugfs.
 217
 218           Say N unless you know you need this.
 219
 220 config ROCKCHIP_IOMMU
 221         bool "Rockchip IOMMU Support"
 222         depends on ARM
 223         depends on ARCH_ROCKCHIP || COMPILE_TEST
 224         select IOMMU_API
 225         select ARM_DMA_USE_IOMMU
 226         help
 227           Support for IOMMUs found on Rockchip rk32xx SOCs.
 228           These IOMMUs allow virtualization of the address space used by most
 229           cores within the multimedia subsystem.
 230           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 231           device.
 232
 233 config TEGRA_IOMMU_GART
 234         bool "Tegra GART IOMMU Support"
 235         depends on ARCH_TEGRA_2x_SOC
 236         select IOMMU_API
 237         help
 238           Enables support for remapping discontiguous physical memory
 239           shared with the operating system into contiguous I/O virtual
 240           space through the GART (Graphics Address Relocation Table)
 241           hardware included on Tegra SoCs.
 242
 243 config TEGRA_IOMMU_SMMU
 244         bool "NVIDIA Tegra SMMU Support"
 245         depends on ARCH_TEGRA
 246         depends on TEGRA_AHB
 247         depends on TEGRA_MC
 248         select IOMMU_API
 249         help
 250           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 251           SoCs (Tegra30 up to Tegra210).
 252
 253 config EXYNOS_IOMMU
 254         bool "Exynos IOMMU Support"
 255         depends on ARCH_EXYNOS && MMU
 256         select IOMMU_API
 257         select ARM_DMA_USE_IOMMU
 258         help
 259           Support for the IOMMU (System MMU) of Samsung Exynos application
 260           processor family. This enables H/W multimedia accelerators to see
 261           non-linear physical memory chunks as linear memory in their
 262           address space.
 263
 264           If unsure, say N here.
 265
 266 config EXYNOS_IOMMU_DEBUG
 267         bool "Debugging log for Exynos IOMMU"
 268         depends on EXYNOS_IOMMU
 269         help
 270           Select this to see the detailed log message that shows what
 271           happens in the IOMMU driver.
 272
 273           Say N unless you need kernel log message for IOMMU debugging.
 274
 275 config IPMMU_VMSA
 276         bool "Renesas VMSA-compatible IPMMU"
 277         depends on ARM_LPAE
 278         depends on ARCH_RENESAS || COMPILE_TEST
 279         select IOMMU_API
 280         select IOMMU_IO_PGTABLE_LPAE
 281         select ARM_DMA_USE_IOMMU
 282         help
 283           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 284           R-Mobile APE6 and R-Car H2/M2 SoCs.
 285
 286           If unsure, say N.
 287
 288 config SPAPR_TCE_IOMMU
 289         bool "sPAPR TCE IOMMU Support"
 290         depends on PPC_POWERNV || PPC_PSERIES
 291         select IOMMU_API
 292         help
 293           Enables bits of IOMMU API required by VFIO. The iommu_ops
 294           is not implemented as it is not necessary for VFIO.
 295
 296 # ARM IOMMU support
 297 config ARM_SMMU
 298         bool "ARM Ltd. System MMU (SMMU) Support"
 299         depends on (ARM64 || ARM) && MMU
 300         select IOMMU_API
 301         select IOMMU_IO_PGTABLE_LPAE
 302         select ARM_DMA_USE_IOMMU if ARM
 303         help
 304           Support for implementations of the ARM System MMU architecture
 305           versions 1 and 2.
 306
 307           Say Y here if your SoC includes an IOMMU device implementing
 308           the ARM SMMU architecture.
 309
 310 config ARM_SMMU_V3
 311         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 312         depends on ARM64
 313         select IOMMU_API
 314         select IOMMU_IO_PGTABLE_LPAE
 315         select GENERIC_MSI_IRQ_DOMAIN
 316         help
 317           Support for implementations of the ARM System MMU architecture
 318           version 3 providing translation support to a PCIe root complex.
 319
 320           Say Y here if your system includes an IOMMU device implementing
 321           the ARM SMMUv3 architecture.
 322
 323 config S390_IOMMU
 324         def_bool y if S390 && PCI
 325         depends on S390 && PCI
 326         select IOMMU_API
 327         help
 328           Support for the IOMMU API for s390 PCI devices.
 329
 330 config S390_CCW_IOMMU
 331         bool "S390 CCW IOMMU Support"
 332         depends on S390 && CCW
 333         select IOMMU_API
 334         help
 335           Enables bits of IOMMU API required by VFIO. The iommu_ops
 336           is not implemented as it is not necessary for VFIO.
 337
 338 config MTK_IOMMU
 339         bool "MTK IOMMU Support"
 340         depends on ARM || ARM64
 341         depends on ARCH_MEDIATEK || COMPILE_TEST
 342         select ARM_DMA_USE_IOMMU
 343         select IOMMU_API
 344         select IOMMU_DMA
 345         select IOMMU_IO_PGTABLE_ARMV7S
 346         select MEMORY
 347         select MTK_SMI
 348         help
 349           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 350           Memory Management Unit. This option enables remapping of DMA memory
 351           accesses for the multimedia subsystem.
 352
 353           If unsure, say N here.
 354
 355 config MTK_IOMMU_V1
 356         bool "MTK IOMMU Version 1 (M4U gen1) Support"
 357         depends on ARM
 358         depends on ARCH_MEDIATEK || COMPILE_TEST
 359         select ARM_DMA_USE_IOMMU
 360         select IOMMU_API
 361         select MEMORY
 362         select MTK_SMI
 363         help
 364           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
 365           Multimedia Memory Managememt Unit. This option enables remapping of
 366           DMA memory accesses for the multimedia subsystem.
 367
 368           if unsure, say N here.
 369
 370 endif # IOMMU_SUPPORT