drivers/iommu/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 # The IOVA library may also be used by non-IOMMU_API users
   3 config IOMMU_IOVA
   4         tristate
   5
   6 # IOMMU_API always gets selected by whoever wants it.
   7 config IOMMU_API
   8         bool
   9
  10 menuconfig IOMMU_SUPPORT
  11         bool "IOMMU Hardware Support"
  12         depends on MMU
  13         default y
  14         ---help---
  15           Say Y here if you want to compile device drivers for IO Memory
  16           Management Units into the kernel. These devices usually allow to
  17           remap DMA requests and/or remap interrupts from other devices on the
  18           system.
  19
  20 if IOMMU_SUPPORT
  21
  22 menu "Generic IOMMU Pagetable Support"
  23
  24 # Selected by the actual pagetable implementations
  25 config IOMMU_IO_PGTABLE
  26         bool
  27
  28 config IOMMU_IO_PGTABLE_LPAE
  29         bool "ARMv7/v8 Long Descriptor Format"
  30         select IOMMU_IO_PGTABLE
  31         depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
  32         help
  33           Enable support for the ARM long descriptor pagetable format.
  34           This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
  35           sizes at both stage-1 and stage-2, as well as address spaces
  36           up to 48-bits in size.
  37
  38 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
  39         bool "LPAE selftests"
  40         depends on IOMMU_IO_PGTABLE_LPAE
  41         help
  42           Enable self-tests for LPAE page table allocator. This performs
  43           a series of page-table consistency checks during boot.
  44
  45           If unsure, say N here.
  46
  47 config IOMMU_IO_PGTABLE_ARMV7S
  48         bool "ARMv7/v8 Short Descriptor Format"
  49         select IOMMU_IO_PGTABLE
  50         depends on ARM || ARM64 || COMPILE_TEST
  51         help
  52           Enable support for the ARM Short-descriptor pagetable format.
  53           This supports 32-bit virtual and physical addresses mapped using
  54           2-level tables with 4KB pages/1MB sections, and contiguous entries
  55           for 64KB pages/16MB supersections if indicated by the IOMMU driver.
  56
  57 config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
  58         bool "ARMv7s selftests"
  59         depends on IOMMU_IO_PGTABLE_ARMV7S
  60         help
  61           Enable self-tests for ARMv7s page table allocator. This performs
  62           a series of page-table consistency checks during boot.
  63
  64           If unsure, say N here.
  65
  66 endmenu
  67
  68 config IOMMU_DEBUGFS
  69         bool "Export IOMMU internals in DebugFS"
  70         depends on DEBUG_FS
  71         help
  72           Allows exposure of IOMMU device internals. This option enables
  73           the use of debugfs by IOMMU drivers as required. Devices can,
  74           at initialization time, cause the IOMMU code to create a top-level
  75           debug/iommu directory, and then populate a subdirectory with
  76           entries as required.
  77
  78 config IOMMU_DEFAULT_PASSTHROUGH
  79         bool "IOMMU passthrough by default"
  80         depends on IOMMU_API
  81         help
  82           Enable passthrough by default, removing the need to pass in
  83           iommu.passthrough=on or iommu=pt through command line. If this
  84           is enabled, you can still disable with iommu.passthrough=off
  85           or iommu=nopt depending on the architecture.
  86
  87           If unsure, say N here.
  88
  89 config OF_IOMMU
  90        def_bool y
  91        depends on OF && IOMMU_API
  92
  93 # IOMMU-agnostic DMA-mapping layer
  94 config IOMMU_DMA
  95         bool
  96         select IOMMU_API
  97         select IOMMU_IOVA
  98         select IRQ_MSI_IOMMU
  99         select NEED_SG_DMA_LENGTH
 100
 101 config FSL_PAMU
 102         bool "Freescale IOMMU support"
 103         depends on PCI
 104         depends on PHYS_64BIT
 105         depends on PPC_E500MC || (COMPILE_TEST && PPC)
 106         select IOMMU_API
 107         select GENERIC_ALLOCATOR
 108         help
 109           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 110           PAMU can authorize memory access, remap the memory address, and remap I/O
 111           transaction types.
 112
 113 # MSM IOMMU support
 114 config MSM_IOMMU
 115         bool "MSM IOMMU Support"
 116         depends on ARM
 117         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 118         select IOMMU_API
 119         select IOMMU_IO_PGTABLE_ARMV7S
 120         help
 121           Support for the IOMMUs found on certain Qualcomm SOCs.
 122           These IOMMUs allow virtualization of the address space used by most
 123           cores within the multimedia subsystem.
 124
 125           If unsure, say N here.
 126
 127 config IOMMU_PGTABLES_L2
 128         def_bool y
 129         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 130
 131 # AMD IOMMU support
 132 config AMD_IOMMU
 133         bool "AMD IOMMU support"
 134         select SWIOTLB
 135         select PCI_MSI
 136         select PCI_ATS
 137         select PCI_PRI
 138         select PCI_PASID
 139         select IOMMU_API
 140         select IOMMU_IOVA
 141         depends on X86_64 && PCI && ACPI
 142         ---help---
 143           With this option you can enable support for AMD IOMMU hardware in
 144           your system. An IOMMU is a hardware component which provides
 145           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 146           can isolate the DMA memory of different devices and protect the
 147           system from misbehaving device drivers or hardware.
 148
 149           You can find out if your system has an AMD IOMMU if you look into
 150           your BIOS for an option to enable it or if you have an IVRS ACPI
 151           table.
 152
 153 config AMD_IOMMU_V2
 154         tristate "AMD IOMMU Version 2 driver"
 155         depends on AMD_IOMMU
 156         select MMU_NOTIFIER
 157         ---help---
 158           This option enables support for the AMD IOMMUv2 features of the IOMMU
 159           hardware. Select this option if you want to use devices that support
 160           the PCI PRI and PASID interface.
 161
 162 config AMD_IOMMU_DEBUGFS
 163         bool "Enable AMD IOMMU internals in DebugFS"
 164         depends on AMD_IOMMU && IOMMU_DEBUGFS
 165         ---help---
 166           !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!
 167
 168           DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
 169           Exposes AMD IOMMU device internals in DebugFS.
 170
 171           This option is -NOT- intended for production environments, and should
 172           not generally be enabled.
 173
 174 # Intel IOMMU support
 175 config DMAR_TABLE
 176         bool
 177
 178 config INTEL_IOMMU
 179         bool "Support for Intel IOMMU using DMA Remapping Devices"
 180         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 181         select IOMMU_API
 182         select IOMMU_IOVA
 183         select NEED_DMA_MAP_STATE
 184         select DMAR_TABLE
 185         help
 186           DMA remapping (DMAR) devices support enables independent address
 187           translations for Direct Memory Access (DMA) from devices.
 188           These DMA remapping devices are reported via ACPI tables
 189           and include PCI device scope covered by these DMA
 190           remapping devices.
 191
 192 config INTEL_IOMMU_DEBUGFS
 193         bool "Export Intel IOMMU internals in Debugfs"
 194         depends on INTEL_IOMMU && IOMMU_DEBUGFS
 195         help
 196           !!!WARNING!!!
 197
 198           DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!
 199
 200           Expose Intel IOMMU internals in Debugfs.
 201
 202           This option is -NOT- intended for production environments, and should
 203           only be enabled for debugging Intel IOMMU.
 204
 205 config INTEL_IOMMU_SVM
 206         bool "Support for Shared Virtual Memory with Intel IOMMU"
 207         depends on INTEL_IOMMU && X86
 208         select PCI_PASID
 209         select MMU_NOTIFIER
 210         help
 211           Shared Virtual Memory (SVM) provides a facility for devices
 212           to access DMA resources through process address space by
 213           means of a Process Address Space ID (PASID).
 214
 215 config INTEL_IOMMU_DEFAULT_ON
 216         def_bool y
 217         prompt "Enable Intel DMA Remapping Devices by default"
 218         depends on INTEL_IOMMU
 219         help
 220           Selecting this option will enable a DMAR device at boot time if
 221           one is found. If this option is not selected, DMAR support can
 222           be enabled by passing intel_iommu=on to the kernel.
 223
 224 config INTEL_IOMMU_BROKEN_GFX_WA
 225         bool "Workaround broken graphics drivers (going away soon)"
 226         depends on INTEL_IOMMU && BROKEN && X86
 227         ---help---
 228           Current Graphics drivers tend to use physical address
 229           for DMA and avoid using DMA APIs. Setting this config
 230           option permits the IOMMU driver to set a unity map for
 231           all the OS-visible memory. Hence the driver can continue
 232           to use physical addresses for DMA, at least until this
 233           option is removed in the 2.6.32 kernel.
 234
 235 config INTEL_IOMMU_FLOPPY_WA
 236         def_bool y
 237         depends on INTEL_IOMMU && X86
 238         ---help---
 239           Floppy disk drivers are known to bypass DMA API calls
 240           thereby failing to work when IOMMU is enabled. This
 241           workaround will setup a 1:1 mapping for the first
 242           16MiB to make floppy (an ISA device) work.
 243
 244 config IRQ_REMAP
 245         bool "Support for Interrupt Remapping"
 246         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 247         select DMAR_TABLE
 248         ---help---
 249           Supports Interrupt remapping for IO-APIC and MSI devices.
 250           To use x2apic mode in the CPU's which support x2APIC enhancements or
 251           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 252
 253 # OMAP IOMMU support
 254 config OMAP_IOMMU
 255         bool "OMAP IOMMU Support"
 256         depends on ARM && MMU
 257         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 258         select IOMMU_API
 259         ---help---
 260           The OMAP3 media platform drivers depend on iommu support,
 261           if you need them say Y here.
 262
 263 config OMAP_IOMMU_DEBUG
 264         bool "Export OMAP IOMMU internals in DebugFS"
 265         depends on OMAP_IOMMU && DEBUG_FS
 266         ---help---
 267           Select this to see extensive information about
 268           the internal state of OMAP IOMMU in debugfs.
 269
 270           Say N unless you know you need this.
 271
 272 config ROCKCHIP_IOMMU
 273         bool "Rockchip IOMMU Support"
 274         depends on ARM || ARM64
 275         depends on ARCH_ROCKCHIP || COMPILE_TEST
 276         select IOMMU_API
 277         select ARM_DMA_USE_IOMMU
 278         help
 279           Support for IOMMUs found on Rockchip rk32xx SOCs.
 280           These IOMMUs allow virtualization of the address space used by most
 281           cores within the multimedia subsystem.
 282           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 283           device.
 284
 285 config TEGRA_IOMMU_GART
 286         bool "Tegra GART IOMMU Support"
 287         depends on ARCH_TEGRA_2x_SOC
 288         depends on TEGRA_MC
 289         select IOMMU_API
 290         help
 291           Enables support for remapping discontiguous physical memory
 292           shared with the operating system into contiguous I/O virtual
 293           space through the GART (Graphics Address Relocation Table)
 294           hardware included on Tegra SoCs.
 295
 296 config TEGRA_IOMMU_SMMU
 297         bool "NVIDIA Tegra SMMU Support"
 298         depends on ARCH_TEGRA
 299         depends on TEGRA_AHB
 300         depends on TEGRA_MC
 301         select IOMMU_API
 302         help
 303           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 304           SoCs (Tegra30 up to Tegra210).
 305
 306 config EXYNOS_IOMMU
 307         bool "Exynos IOMMU Support"
 308         depends on ARCH_EXYNOS && MMU
 309         depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
 310         select IOMMU_API
 311         select ARM_DMA_USE_IOMMU
 312         help
 313           Support for the IOMMU (System MMU) of Samsung Exynos application
 314           processor family. This enables H/W multimedia accelerators to see
 315           non-linear physical memory chunks as linear memory in their
 316           address space.
 317
 318           If unsure, say N here.
 319
 320 config EXYNOS_IOMMU_DEBUG
 321         bool "Debugging log for Exynos IOMMU"
 322         depends on EXYNOS_IOMMU
 323         help
 324           Select this to see the detailed log message that shows what
 325           happens in the IOMMU driver.
 326
 327           Say N unless you need kernel log message for IOMMU debugging.
 328
 329 config IPMMU_VMSA
 330         bool "Renesas VMSA-compatible IPMMU"
 331         depends on ARM || IOMMU_DMA
 332         depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
 333         select IOMMU_API
 334         select IOMMU_IO_PGTABLE_LPAE
 335         select ARM_DMA_USE_IOMMU
 336         help
 337           Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
 338           APE6, R-Car Gen2, and R-Car Gen3 SoCs.
 339
 340           If unsure, say N.
 341
 342 config SPAPR_TCE_IOMMU
 343         bool "sPAPR TCE IOMMU Support"
 344         depends on PPC_POWERNV || PPC_PSERIES
 345         select IOMMU_API
 346         help
 347           Enables bits of IOMMU API required by VFIO. The iommu_ops
 348           is not implemented as it is not necessary for VFIO.
 349
 350 # ARM IOMMU support
 351 config ARM_SMMU
 352         bool "ARM Ltd. System MMU (SMMU) Support"
 353         depends on (ARM64 || ARM) && MMU
 354         select IOMMU_API
 355         select IOMMU_IO_PGTABLE_LPAE
 356         select ARM_DMA_USE_IOMMU if ARM
 357         help
 358           Support for implementations of the ARM System MMU architecture
 359           versions 1 and 2.
 360
 361           Say Y here if your SoC includes an IOMMU device implementing
 362           the ARM SMMU architecture.
 363
 364 config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
 365         bool "Default to disabling bypass on ARM SMMU v1 and v2"
 366         depends on ARM_SMMU
 367         default y
 368         help
 369           Say Y here to (by default) disable bypass streams such that
 370           incoming transactions from devices that are not attached to
 371           an iommu domain will report an abort back to the device and
 372           will not be allowed to pass through the SMMU.
 373
 374           Any old kernels that existed before this KConfig was
 375           introduced would default to _allowing_ bypass (AKA the
 376           equivalent of NO for this config).  However the default for
 377           this option is YES because the old behavior is insecure.
 378
 379           There are few reasons to allow unmatched stream bypass, and
 380           even fewer good ones.  If saying YES here breaks your board
 381           you should work on fixing your board.  This KConfig option
 382           is expected to be removed in the future and we'll simply
 383           hardcode the bypass disable in the code.
 384
 385           NOTE: the kernel command line parameter
 386           'arm-smmu.disable_bypass' will continue to override this
 387           config.
 388
 389 config ARM_SMMU_V3
 390         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 391         depends on ARM64
 392         select IOMMU_API
 393         select IOMMU_IO_PGTABLE_LPAE
 394         select GENERIC_MSI_IRQ_DOMAIN
 395         help
 396           Support for implementations of the ARM System MMU architecture
 397           version 3 providing translation support to a PCIe root complex.
 398
 399           Say Y here if your system includes an IOMMU device implementing
 400           the ARM SMMUv3 architecture.
 401
 402 config S390_IOMMU
 403         def_bool y if S390 && PCI
 404         depends on S390 && PCI
 405         select IOMMU_API
 406         help
 407           Support for the IOMMU API for s390 PCI devices.
 408
 409 config S390_CCW_IOMMU
 410         bool "S390 CCW IOMMU Support"
 411         depends on S390 && CCW
 412         select IOMMU_API
 413         help
 414           Enables bits of IOMMU API required by VFIO. The iommu_ops
 415           is not implemented as it is not necessary for VFIO.
 416
 417 config S390_AP_IOMMU
 418         bool "S390 AP IOMMU Support"
 419         depends on S390 && ZCRYPT
 420         select IOMMU_API
 421         help
 422           Enables bits of IOMMU API required by VFIO. The iommu_ops
 423           is not implemented as it is not necessary for VFIO.
 424
 425 config MTK_IOMMU
 426         bool "MTK IOMMU Support"
 427         depends on ARM || ARM64
 428         depends on ARCH_MEDIATEK || COMPILE_TEST
 429         select ARM_DMA_USE_IOMMU
 430         select IOMMU_API
 431         select IOMMU_DMA
 432         select IOMMU_IO_PGTABLE_ARMV7S
 433         select MEMORY
 434         select MTK_SMI
 435         help
 436           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 437           Memory Management Unit. This option enables remapping of DMA memory
 438           accesses for the multimedia subsystem.
 439
 440           If unsure, say N here.
 441
 442 config MTK_IOMMU_V1
 443         bool "MTK IOMMU Version 1 (M4U gen1) Support"
 444         depends on ARM
 445         depends on ARCH_MEDIATEK || COMPILE_TEST
 446         select ARM_DMA_USE_IOMMU
 447         select IOMMU_API
 448         select MEMORY
 449         select MTK_SMI
 450         help
 451           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
 452           Multimedia Memory Managememt Unit. This option enables remapping of
 453           DMA memory accesses for the multimedia subsystem.
 454
 455           if unsure, say N here.
 456
 457 config QCOM_IOMMU
 458         # Note: iommu drivers cannot (yet?) be built as modules
 459         bool "Qualcomm IOMMU Support"
 460         depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
 461         select IOMMU_API
 462         select IOMMU_IO_PGTABLE_LPAE
 463         select ARM_DMA_USE_IOMMU
 464         help
 465           Support for IOMMU on certain Qualcomm SoCs.
 466
 467 config HYPERV_IOMMU
 468         bool "Hyper-V x2APIC IRQ Handling"
 469         depends on HYPERV
 470         select IOMMU_API
 471         default HYPERV
 472         help
 473           Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
 474           guests to run with x2APIC mode enabled.
 475
 476 config VIRTIO_IOMMU
 477         bool "Virtio IOMMU driver"
 478         depends on VIRTIO=y
 479         depends on ARM64
 480         select IOMMU_API
 481         select INTERVAL_TREE
 482         help
 483           Para-virtualised IOMMU driver with virtio.
 484
 485           Say Y here if you intend to run this kernel as a guest.
 486
 487 endif # IOMMU_SUPPORT