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 && !GENERIC_ATOMIC64))
  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 PCI
  80         depends on PHYS_64BIT
  81         depends on PPC_E500MC || (COMPILE_TEST && PPC)
  82         select IOMMU_API
  83         select GENERIC_ALLOCATOR
  84         help
  85           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  86           PAMU can authorize memory access, remap the memory address, and remap I/O
  87           transaction types.
  88
  89 # MSM IOMMU support
  90 config MSM_IOMMU
  91         bool "MSM IOMMU Support"
  92         depends on ARM
  93         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  94         select IOMMU_API
  95         select IOMMU_IO_PGTABLE_ARMV7S
  96         help
  97           Support for the IOMMUs found on certain Qualcomm SOCs.
  98           These IOMMUs allow virtualization of the address space used by most
  99           cores within the multimedia subsystem.
 100
 101           If unsure, say N here.
 102
 103 config IOMMU_PGTABLES_L2
 104         def_bool y
 105         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 106
 107 # AMD IOMMU support
 108 config AMD_IOMMU
 109         bool "AMD IOMMU support"
 110         select SWIOTLB
 111         select PCI_MSI
 112         select PCI_ATS
 113         select PCI_PRI
 114         select PCI_PASID
 115         select IOMMU_API
 116         select IOMMU_IOVA
 117         depends on X86_64 && PCI && ACPI
 118         ---help---
 119           With this option you can enable support for AMD IOMMU hardware in
 120           your system. An IOMMU is a hardware component which provides
 121           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 122           can isolate the DMA memory of different devices and protect the
 123           system from misbehaving device drivers or hardware.
 124
 125           You can find out if your system has an AMD IOMMU if you look into
 126           your BIOS for an option to enable it or if you have an IVRS ACPI
 127           table.
 128
 129 config AMD_IOMMU_V2
 130         tristate "AMD IOMMU Version 2 driver"
 131         depends on AMD_IOMMU
 132         select MMU_NOTIFIER
 133         ---help---
 134           This option enables support for the AMD IOMMUv2 features of the IOMMU
 135           hardware. Select this option if you want to use devices that support
 136           the PCI PRI and PASID interface.
 137
 138 # Intel IOMMU support
 139 config DMAR_TABLE
 140         bool
 141
 142 config INTEL_IOMMU
 143         bool "Support for Intel IOMMU using DMA Remapping Devices"
 144         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 145         select IOMMU_API
 146         select IOMMU_IOVA
 147         select DMAR_TABLE
 148         help
 149           DMA remapping (DMAR) devices support enables independent address
 150           translations for Direct Memory Access (DMA) from devices.
 151           These DMA remapping devices are reported via ACPI tables
 152           and include PCI device scope covered by these DMA
 153           remapping devices.
 154
 155 config INTEL_IOMMU_SVM
 156         bool "Support for Shared Virtual Memory with Intel IOMMU"
 157         depends on INTEL_IOMMU && X86
 158         select PCI_PASID
 159         select MMU_NOTIFIER
 160         help
 161           Shared Virtual Memory (SVM) provides a facility for devices
 162           to access DMA resources through process address space by
 163           means of a Process Address Space ID (PASID).
 164
 165 config INTEL_IOMMU_DEFAULT_ON
 166         def_bool y
 167         prompt "Enable Intel DMA Remapping Devices by default"
 168         depends on INTEL_IOMMU
 169         help
 170           Selecting this option will enable a DMAR device at boot time if
 171           one is found. If this option is not selected, DMAR support can
 172           be enabled by passing intel_iommu=on to the kernel.
 173
 174 config INTEL_IOMMU_BROKEN_GFX_WA
 175         bool "Workaround broken graphics drivers (going away soon)"
 176         depends on INTEL_IOMMU && BROKEN && X86
 177         ---help---
 178           Current Graphics drivers tend to use physical address
 179           for DMA and avoid using DMA APIs. Setting this config
 180           option permits the IOMMU driver to set a unity map for
 181           all the OS-visible memory. Hence the driver can continue
 182           to use physical addresses for DMA, at least until this
 183           option is removed in the 2.6.32 kernel.
 184
 185 config INTEL_IOMMU_FLOPPY_WA
 186         def_bool y
 187         depends on INTEL_IOMMU && X86
 188         ---help---
 189           Floppy disk drivers are known to bypass DMA API calls
 190           thereby failing to work when IOMMU is enabled. This
 191           workaround will setup a 1:1 mapping for the first
 192           16MiB to make floppy (an ISA device) work.
 193
 194 config IRQ_REMAP
 195         bool "Support for Interrupt Remapping"
 196         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 197         select DMAR_TABLE
 198         ---help---
 199           Supports Interrupt remapping for IO-APIC and MSI devices.
 200           To use x2apic mode in the CPU's which support x2APIC enhancements or
 201           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 202
 203 # OMAP IOMMU support
 204 config OMAP_IOMMU
 205         bool "OMAP IOMMU Support"
 206         depends on ARM && MMU
 207         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 208         select IOMMU_API
 209         ---help---
 210           The OMAP3 media platform drivers depend on iommu support,
 211           if you need them say Y here.
 212
 213 config OMAP_IOMMU_DEBUG
 214         bool "Export OMAP IOMMU internals in DebugFS"
 215         depends on OMAP_IOMMU && DEBUG_FS
 216         ---help---
 217           Select this to see extensive information about
 218           the internal state of OMAP IOMMU in debugfs.
 219
 220           Say N unless you know you need this.
 221
 222 config ROCKCHIP_IOMMU
 223         bool "Rockchip IOMMU Support"
 224         depends on ARM || ARM64
 225         depends on ARCH_ROCKCHIP || COMPILE_TEST
 226         select IOMMU_API
 227         select ARM_DMA_USE_IOMMU
 228         help
 229           Support for IOMMUs found on Rockchip rk32xx SOCs.
 230           These IOMMUs allow virtualization of the address space used by most
 231           cores within the multimedia subsystem.
 232           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 233           device.
 234
 235 config TEGRA_IOMMU_GART
 236         bool "Tegra GART IOMMU Support"
 237         depends on ARCH_TEGRA_2x_SOC
 238         select IOMMU_API
 239         help
 240           Enables support for remapping discontiguous physical memory
 241           shared with the operating system into contiguous I/O virtual
 242           space through the GART (Graphics Address Relocation Table)
 243           hardware included on Tegra SoCs.
 244
 245 config TEGRA_IOMMU_SMMU
 246         bool "NVIDIA Tegra SMMU Support"
 247         depends on ARCH_TEGRA
 248         depends on TEGRA_AHB
 249         depends on TEGRA_MC
 250         select IOMMU_API
 251         help
 252           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 253           SoCs (Tegra30 up to Tegra210).
 254
 255 config EXYNOS_IOMMU
 256         bool "Exynos IOMMU Support"
 257         depends on ARCH_EXYNOS && MMU
 258         depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
 259         select IOMMU_API
 260         select ARM_DMA_USE_IOMMU
 261         help
 262           Support for the IOMMU (System MMU) of Samsung Exynos application
 263           processor family. This enables H/W multimedia accelerators to see
 264           non-linear physical memory chunks as linear memory in their
 265           address space.
 266
 267           If unsure, say N here.
 268
 269 config EXYNOS_IOMMU_DEBUG
 270         bool "Debugging log for Exynos IOMMU"
 271         depends on EXYNOS_IOMMU
 272         help
 273           Select this to see the detailed log message that shows what
 274           happens in the IOMMU driver.
 275
 276           Say N unless you need kernel log message for IOMMU debugging.
 277
 278 config IPMMU_VMSA
 279         bool "Renesas VMSA-compatible IPMMU"
 280         depends on ARM || IOMMU_DMA
 281         depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
 282         select IOMMU_API
 283         select IOMMU_IO_PGTABLE_LPAE
 284         select ARM_DMA_USE_IOMMU
 285         help
 286           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 287           R-Mobile APE6 and R-Car H2/M2 SoCs.
 288
 289           If unsure, say N.
 290
 291 config SPAPR_TCE_IOMMU
 292         bool "sPAPR TCE IOMMU Support"
 293         depends on PPC_POWERNV || PPC_PSERIES
 294         select IOMMU_API
 295         help
 296           Enables bits of IOMMU API required by VFIO. The iommu_ops
 297           is not implemented as it is not necessary for VFIO.
 298
 299 # ARM IOMMU support
 300 config ARM_SMMU
 301         bool "ARM Ltd. System MMU (SMMU) Support"
 302         depends on (ARM64 || ARM) && MMU
 303         select IOMMU_API
 304         select IOMMU_IO_PGTABLE_LPAE
 305         select ARM_DMA_USE_IOMMU if ARM
 306         help
 307           Support for implementations of the ARM System MMU architecture
 308           versions 1 and 2.
 309
 310           Say Y here if your SoC includes an IOMMU device implementing
 311           the ARM SMMU architecture.
 312
 313 config ARM_SMMU_V3
 314         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 315         depends on ARM64
 316         select IOMMU_API
 317         select IOMMU_IO_PGTABLE_LPAE
 318         select GENERIC_MSI_IRQ_DOMAIN
 319         help
 320           Support for implementations of the ARM System MMU architecture
 321           version 3 providing translation support to a PCIe root complex.
 322
 323           Say Y here if your system includes an IOMMU device implementing
 324           the ARM SMMUv3 architecture.
 325
 326 config S390_IOMMU
 327         def_bool y if S390 && PCI
 328         depends on S390 && PCI
 329         select IOMMU_API
 330         help
 331           Support for the IOMMU API for s390 PCI devices.
 332
 333 config S390_CCW_IOMMU
 334         bool "S390 CCW IOMMU Support"
 335         depends on S390 && CCW
 336         select IOMMU_API
 337         help
 338           Enables bits of IOMMU API required by VFIO. The iommu_ops
 339           is not implemented as it is not necessary for VFIO.
 340
 341 config MTK_IOMMU
 342         bool "MTK IOMMU Support"
 343         depends on ARM || ARM64
 344         depends on ARCH_MEDIATEK || COMPILE_TEST
 345         select ARM_DMA_USE_IOMMU
 346         select IOMMU_API
 347         select IOMMU_DMA
 348         select IOMMU_IO_PGTABLE_ARMV7S
 349         select MEMORY
 350         select MTK_SMI
 351         help
 352           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 353           Memory Management Unit. This option enables remapping of DMA memory
 354           accesses for the multimedia subsystem.
 355
 356           If unsure, say N here.
 357
 358 config MTK_IOMMU_V1
 359         bool "MTK IOMMU Version 1 (M4U gen1) Support"
 360         depends on ARM
 361         depends on ARCH_MEDIATEK || COMPILE_TEST
 362         select ARM_DMA_USE_IOMMU
 363         select IOMMU_API
 364         select MEMORY
 365         select MTK_SMI
 366         help
 367           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
 368           Multimedia Memory Managememt Unit. This option enables remapping of
 369           DMA memory accesses for the multimedia subsystem.
 370
 371           if unsure, say N here.
 372
 373 config QCOM_IOMMU
 374         # Note: iommu drivers cannot (yet?) be built as modules
 375         bool "Qualcomm IOMMU Support"
 376         depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
 377         depends on HAS_DMA
 378         select IOMMU_API
 379         select IOMMU_IO_PGTABLE_LPAE
 380         select ARM_DMA_USE_IOMMU
 381         help
 382           Support for IOMMU on certain Qualcomm SoCs.
 383
 384 endif # IOMMU_SUPPORT