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)
 181         select IOMMU_API
 182         select IOMMU_IOVA
 183         select NEED_DMA_MAP_STATE
 184         select DMAR_TABLE
 185         select SWIOTLB
 186         help
 187           DMA remapping (DMAR) devices support enables independent address
 188           translations for Direct Memory Access (DMA) from devices.
 189           These DMA remapping devices are reported via ACPI tables
 190           and include PCI device scope covered by these DMA
 191           remapping devices.
 192
 193 config INTEL_IOMMU_DEBUGFS
 194         bool "Export Intel IOMMU internals in Debugfs"
 195         depends on INTEL_IOMMU && IOMMU_DEBUGFS
 196         help
 197           !!!WARNING!!!
 198
 199           DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!
 200
 201           Expose Intel IOMMU internals in Debugfs.
 202
 203           This option is -NOT- intended for production environments, and should
 204           only be enabled for debugging Intel IOMMU.
 205
 206 config INTEL_IOMMU_SVM
 207         bool "Support for Shared Virtual Memory with Intel IOMMU"
 208         depends on INTEL_IOMMU && X86
 209         select PCI_PASID
 210         select MMU_NOTIFIER
 211         help
 212           Shared Virtual Memory (SVM) provides a facility for devices
 213           to access DMA resources through process address space by
 214           means of a Process Address Space ID (PASID).
 215
 216 config INTEL_IOMMU_DEFAULT_ON
 217         def_bool y
 218         prompt "Enable Intel DMA Remapping Devices by default"
 219         depends on INTEL_IOMMU
 220         help
 221           Selecting this option will enable a DMAR device at boot time if
 222           one is found. If this option is not selected, DMAR support can
 223           be enabled by passing intel_iommu=on to the kernel.
 224
 225 config INTEL_IOMMU_BROKEN_GFX_WA
 226         bool "Workaround broken graphics drivers (going away soon)"
 227         depends on INTEL_IOMMU && BROKEN && X86
 228         ---help---
 229           Current Graphics drivers tend to use physical address
 230           for DMA and avoid using DMA APIs. Setting this config
 231           option permits the IOMMU driver to set a unity map for
 232           all the OS-visible memory. Hence the driver can continue
 233           to use physical addresses for DMA, at least until this
 234           option is removed in the 2.6.32 kernel.
 235
 236 config INTEL_IOMMU_FLOPPY_WA
 237         def_bool y
 238         depends on INTEL_IOMMU && X86
 239         ---help---
 240           Floppy disk drivers are known to bypass DMA API calls
 241           thereby failing to work when IOMMU is enabled. This
 242           workaround will setup a 1:1 mapping for the first
 243           16MiB to make floppy (an ISA device) work.
 244
 245 config IRQ_REMAP
 246         bool "Support for Interrupt Remapping"
 247         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 248         select DMAR_TABLE
 249         ---help---
 250           Supports Interrupt remapping for IO-APIC and MSI devices.
 251           To use x2apic mode in the CPU's which support x2APIC enhancements or
 252           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 253
 254 # OMAP IOMMU support
 255 config OMAP_IOMMU
 256         bool "OMAP IOMMU Support"
 257         depends on ARM && MMU
 258         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 259         select IOMMU_API
 260         ---help---
 261           The OMAP3 media platform drivers depend on iommu support,
 262           if you need them say Y here.
 263
 264 config OMAP_IOMMU_DEBUG
 265         bool "Export OMAP IOMMU internals in DebugFS"
 266         depends on OMAP_IOMMU && DEBUG_FS
 267         ---help---
 268           Select this to see extensive information about
 269           the internal state of OMAP IOMMU in debugfs.
 270
 271           Say N unless you know you need this.
 272
 273 config ROCKCHIP_IOMMU
 274         bool "Rockchip IOMMU Support"
 275         depends on ARM || ARM64
 276         depends on ARCH_ROCKCHIP || COMPILE_TEST
 277         select IOMMU_API
 278         select ARM_DMA_USE_IOMMU
 279         help
 280           Support for IOMMUs found on Rockchip rk32xx SOCs.
 281           These IOMMUs allow virtualization of the address space used by most
 282           cores within the multimedia subsystem.
 283           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 284           device.
 285
 286 config TEGRA_IOMMU_GART
 287         bool "Tegra GART IOMMU Support"
 288         depends on ARCH_TEGRA_2x_SOC
 289         depends on TEGRA_MC
 290         select IOMMU_API
 291         help
 292           Enables support for remapping discontiguous physical memory
 293           shared with the operating system into contiguous I/O virtual
 294           space through the GART (Graphics Address Relocation Table)
 295           hardware included on Tegra SoCs.
 296
 297 config TEGRA_IOMMU_SMMU
 298         bool "NVIDIA Tegra SMMU Support"
 299         depends on ARCH_TEGRA
 300         depends on TEGRA_AHB
 301         depends on TEGRA_MC
 302         select IOMMU_API
 303         help
 304           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 305           SoCs (Tegra30 up to Tegra210).
 306
 307 config EXYNOS_IOMMU
 308         bool "Exynos IOMMU Support"
 309         depends on ARCH_EXYNOS && MMU
 310         depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
 311         select IOMMU_API
 312         select ARM_DMA_USE_IOMMU
 313         help
 314           Support for the IOMMU (System MMU) of Samsung Exynos application
 315           processor family. This enables H/W multimedia accelerators to see
 316           non-linear physical memory chunks as linear memory in their
 317           address space.
 318
 319           If unsure, say N here.
 320
 321 config EXYNOS_IOMMU_DEBUG
 322         bool "Debugging log for Exynos IOMMU"
 323         depends on EXYNOS_IOMMU
 324         help
 325           Select this to see the detailed log message that shows what
 326           happens in the IOMMU driver.
 327
 328           Say N unless you need kernel log message for IOMMU debugging.
 329
 330 config IPMMU_VMSA
 331         bool "Renesas VMSA-compatible IPMMU"
 332         depends on ARM || IOMMU_DMA
 333         depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
 334         select IOMMU_API
 335         select IOMMU_IO_PGTABLE_LPAE
 336         select ARM_DMA_USE_IOMMU
 337         help
 338           Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
 339           APE6, R-Car Gen2, and R-Car Gen3 SoCs.
 340
 341           If unsure, say N.
 342
 343 config SPAPR_TCE_IOMMU
 344         bool "sPAPR TCE IOMMU Support"
 345         depends on PPC_POWERNV || PPC_PSERIES
 346         select IOMMU_API
 347         help
 348           Enables bits of IOMMU API required by VFIO. The iommu_ops
 349           is not implemented as it is not necessary for VFIO.
 350
 351 # ARM IOMMU support
 352 config ARM_SMMU
 353         bool "ARM Ltd. System MMU (SMMU) Support"
 354         depends on (ARM64 || ARM) && MMU
 355         select IOMMU_API
 356         select IOMMU_IO_PGTABLE_LPAE
 357         select ARM_DMA_USE_IOMMU if ARM
 358         help
 359           Support for implementations of the ARM System MMU architecture
 360           versions 1 and 2.
 361
 362           Say Y here if your SoC includes an IOMMU device implementing
 363           the ARM SMMU architecture.
 364
 365 config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
 366         bool "Default to disabling bypass on ARM SMMU v1 and v2"
 367         depends on ARM_SMMU
 368         default y
 369         help
 370           Say Y here to (by default) disable bypass streams such that
 371           incoming transactions from devices that are not attached to
 372           an iommu domain will report an abort back to the device and
 373           will not be allowed to pass through the SMMU.
 374
 375           Any old kernels that existed before this KConfig was
 376           introduced would default to _allowing_ bypass (AKA the
 377           equivalent of NO for this config).  However the default for
 378           this option is YES because the old behavior is insecure.
 379
 380           There are few reasons to allow unmatched stream bypass, and
 381           even fewer good ones.  If saying YES here breaks your board
 382           you should work on fixing your board.  This KConfig option
 383           is expected to be removed in the future and we'll simply
 384           hardcode the bypass disable in the code.
 385
 386           NOTE: the kernel command line parameter
 387           'arm-smmu.disable_bypass' will continue to override this
 388           config.
 389
 390 config ARM_SMMU_V3
 391         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 392         depends on ARM64
 393         select IOMMU_API
 394         select IOMMU_IO_PGTABLE_LPAE
 395         select GENERIC_MSI_IRQ_DOMAIN
 396         help
 397           Support for implementations of the ARM System MMU architecture
 398           version 3 providing translation support to a PCIe root complex.
 399
 400           Say Y here if your system includes an IOMMU device implementing
 401           the ARM SMMUv3 architecture.
 402
 403 config S390_IOMMU
 404         def_bool y if S390 && PCI
 405         depends on S390 && PCI
 406         select IOMMU_API
 407         help
 408           Support for the IOMMU API for s390 PCI devices.
 409
 410 config S390_CCW_IOMMU
 411         bool "S390 CCW IOMMU Support"
 412         depends on S390 && CCW
 413         select IOMMU_API
 414         help
 415           Enables bits of IOMMU API required by VFIO. The iommu_ops
 416           is not implemented as it is not necessary for VFIO.
 417
 418 config S390_AP_IOMMU
 419         bool "S390 AP IOMMU Support"
 420         depends on S390 && ZCRYPT
 421         select IOMMU_API
 422         help
 423           Enables bits of IOMMU API required by VFIO. The iommu_ops
 424           is not implemented as it is not necessary for VFIO.
 425
 426 config MTK_IOMMU
 427         bool "MTK IOMMU Support"
 428         depends on ARM || ARM64
 429         depends on ARCH_MEDIATEK || COMPILE_TEST
 430         select ARM_DMA_USE_IOMMU
 431         select IOMMU_API
 432         select IOMMU_DMA
 433         select IOMMU_IO_PGTABLE_ARMV7S
 434         select MEMORY
 435         select MTK_SMI
 436         help
 437           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 438           Memory Management Unit. This option enables remapping of DMA memory
 439           accesses for the multimedia subsystem.
 440
 441           If unsure, say N here.
 442
 443 config MTK_IOMMU_V1
 444         bool "MTK IOMMU Version 1 (M4U gen1) Support"
 445         depends on ARM
 446         depends on ARCH_MEDIATEK || COMPILE_TEST
 447         select ARM_DMA_USE_IOMMU
 448         select IOMMU_API
 449         select MEMORY
 450         select MTK_SMI
 451         help
 452           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
 453           Multimedia Memory Managememt Unit. This option enables remapping of
 454           DMA memory accesses for the multimedia subsystem.
 455
 456           if unsure, say N here.
 457
 458 config QCOM_IOMMU
 459         # Note: iommu drivers cannot (yet?) be built as modules
 460         bool "Qualcomm IOMMU Support"
 461         depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
 462         select IOMMU_API
 463         select IOMMU_IO_PGTABLE_LPAE
 464         select ARM_DMA_USE_IOMMU
 465         help
 466           Support for IOMMU on certain Qualcomm SoCs.
 467
 468 config HYPERV_IOMMU
 469         bool "Hyper-V x2APIC IRQ Handling"
 470         depends on HYPERV
 471         select IOMMU_API
 472         default HYPERV
 473         help
 474           Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
 475           guests to run with x2APIC mode enabled.
 476
 477 config VIRTIO_IOMMU
 478         bool "Virtio IOMMU driver"
 479         depends on VIRTIO=y
 480         depends on ARM64
 481         select IOMMU_API
 482         select INTERVAL_TREE
 483         help
 484           Para-virtualised IOMMU driver with virtio.
 485
 486           Say Y here if you intend to run this kernel as a guest.
 487
 488 endif # IOMMU_SUPPORT