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 # The IOASID library may also be used by non-IOMMU_API users
   7 config IOASID
   8         tristate
   9
  10 # IOMMU_API always gets selected by whoever wants it.
  11 config IOMMU_API
  12         bool
  13
  14 menuconfig IOMMU_SUPPORT
  15         bool "IOMMU Hardware Support"
  16         depends on MMU
  17         default y
  18         help
  19           Say Y here if you want to compile device drivers for IO Memory
  20           Management Units into the kernel. These devices usually allow to
  21           remap DMA requests and/or remap interrupts from other devices on the
  22           system.
  23
  24 if IOMMU_SUPPORT
  25
  26 menu "Generic IOMMU Pagetable Support"
  27
  28 # Selected by the actual pagetable implementations
  29 config IOMMU_IO_PGTABLE
  30         bool
  31
  32 config IOMMU_IO_PGTABLE_LPAE
  33         bool "ARMv7/v8 Long Descriptor Format"
  34         select IOMMU_IO_PGTABLE
  35         depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
  36         help
  37           Enable support for the ARM long descriptor pagetable format.
  38           This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
  39           sizes at both stage-1 and stage-2, as well as address spaces
  40           up to 48-bits in size.
  41
  42 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
  43         bool "LPAE selftests"
  44         depends on IOMMU_IO_PGTABLE_LPAE
  45         help
  46           Enable self-tests for LPAE page table allocator. This performs
  47           a series of page-table consistency checks during boot.
  48
  49           If unsure, say N here.
  50
  51 config IOMMU_IO_PGTABLE_ARMV7S
  52         bool "ARMv7/v8 Short Descriptor Format"
  53         select IOMMU_IO_PGTABLE
  54         depends on ARM || ARM64 || COMPILE_TEST
  55         help
  56           Enable support for the ARM Short-descriptor pagetable format.
  57           This supports 32-bit virtual and physical addresses mapped using
  58           2-level tables with 4KB pages/1MB sections, and contiguous entries
  59           for 64KB pages/16MB supersections if indicated by the IOMMU driver.
  60
  61 config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
  62         bool "ARMv7s selftests"
  63         depends on IOMMU_IO_PGTABLE_ARMV7S
  64         help
  65           Enable self-tests for ARMv7s page table allocator. This performs
  66           a series of page-table consistency checks during boot.
  67
  68           If unsure, say N here.
  69
  70 endmenu
  71
  72 config IOMMU_DEBUGFS
  73         bool "Export IOMMU internals in DebugFS"
  74         depends on DEBUG_FS
  75         help
  76           Allows exposure of IOMMU device internals. This option enables
  77           the use of debugfs by IOMMU drivers as required. Devices can,
  78           at initialization time, cause the IOMMU code to create a top-level
  79           debug/iommu directory, and then populate a subdirectory with
  80           entries as required.
  81
  82 config IOMMU_DEFAULT_PASSTHROUGH
  83         bool "IOMMU passthrough by default"
  84         depends on IOMMU_API
  85         help
  86           Enable passthrough by default, removing the need to pass in
  87           iommu.passthrough=on or iommu=pt through command line. If this
  88           is enabled, you can still disable with iommu.passthrough=off
  89           or iommu=nopt depending on the architecture.
  90
  91           If unsure, say N here.
  92
  93 config OF_IOMMU
  94         def_bool y
  95         depends on OF && IOMMU_API
  96
  97 # IOMMU-agnostic DMA-mapping layer
  98 config IOMMU_DMA
  99         bool
 100         select DMA_OPS
 101         select IOMMU_API
 102         select IOMMU_IOVA
 103         select IRQ_MSI_IOMMU
 104         select NEED_SG_DMA_LENGTH
 105
 106 # Shared Virtual Addressing library
 107 config IOMMU_SVA_LIB
 108         bool
 109         select IOASID
 110
 111 config FSL_PAMU
 112         bool "Freescale IOMMU support"
 113         depends on PCI
 114         depends on PHYS_64BIT
 115         depends on PPC_E500MC || (COMPILE_TEST && PPC)
 116         select IOMMU_API
 117         select GENERIC_ALLOCATOR
 118         help
 119           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 120           PAMU can authorize memory access, remap the memory address, and remap I/O
 121           transaction types.
 122
 123 # MSM IOMMU support
 124 config MSM_IOMMU
 125         bool "MSM IOMMU Support"
 126         depends on ARM
 127         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 128         select IOMMU_API
 129         select IOMMU_IO_PGTABLE_ARMV7S
 130         help
 131           Support for the IOMMUs found on certain Qualcomm SOCs.
 132           These IOMMUs allow virtualization of the address space used by most
 133           cores within the multimedia subsystem.
 134
 135           If unsure, say N here.
 136
 137 source "drivers/iommu/amd/Kconfig"
 138 source "drivers/iommu/intel/Kconfig"
 139
 140 config IRQ_REMAP
 141         bool "Support for Interrupt Remapping"
 142         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 143         select DMAR_TABLE
 144         help
 145           Supports Interrupt remapping for IO-APIC and MSI devices.
 146           To use x2apic mode in the CPU's which support x2APIC enhancements or
 147           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 148
 149 # OMAP IOMMU support
 150 config OMAP_IOMMU
 151         bool "OMAP IOMMU Support"
 152         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 153         select IOMMU_API
 154         help
 155           The OMAP3 media platform drivers depend on iommu support,
 156           if you need them say Y here.
 157
 158 config OMAP_IOMMU_DEBUG
 159         bool "Export OMAP IOMMU internals in DebugFS"
 160         depends on OMAP_IOMMU && DEBUG_FS
 161         help
 162           Select this to see extensive information about
 163           the internal state of OMAP IOMMU in debugfs.
 164
 165           Say N unless you know you need this.
 166
 167 config ROCKCHIP_IOMMU
 168         bool "Rockchip IOMMU Support"
 169         depends on ARCH_ROCKCHIP || COMPILE_TEST
 170         select IOMMU_API
 171         select ARM_DMA_USE_IOMMU
 172         help
 173           Support for IOMMUs found on Rockchip rk32xx SOCs.
 174           These IOMMUs allow virtualization of the address space used by most
 175           cores within the multimedia subsystem.
 176           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 177           device.
 178
 179 config SUN50I_IOMMU
 180         bool "Allwinner H6 IOMMU Support"
 181         depends on HAS_DMA
 182         depends on ARCH_SUNXI || COMPILE_TEST
 183         select ARM_DMA_USE_IOMMU
 184         select IOMMU_API
 185         help
 186           Support for the IOMMU introduced in the Allwinner H6 SoCs.
 187
 188 config TEGRA_IOMMU_GART
 189         bool "Tegra GART IOMMU Support"
 190         depends on ARCH_TEGRA_2x_SOC
 191         depends on TEGRA_MC
 192         select IOMMU_API
 193         help
 194           Enables support for remapping discontiguous physical memory
 195           shared with the operating system into contiguous I/O virtual
 196           space through the GART (Graphics Address Relocation Table)
 197           hardware included on Tegra SoCs.
 198
 199 config TEGRA_IOMMU_SMMU
 200         bool "NVIDIA Tegra SMMU Support"
 201         depends on ARCH_TEGRA
 202         depends on TEGRA_AHB
 203         depends on TEGRA_MC
 204         select IOMMU_API
 205         help
 206           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 207           SoCs (Tegra30 up to Tegra210).
 208
 209 config EXYNOS_IOMMU
 210         bool "Exynos IOMMU Support"
 211         depends on ARCH_EXYNOS || COMPILE_TEST
 212         depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
 213         select IOMMU_API
 214         select ARM_DMA_USE_IOMMU
 215         help
 216           Support for the IOMMU (System MMU) of Samsung Exynos application
 217           processor family. This enables H/W multimedia accelerators to see
 218           non-linear physical memory chunks as linear memory in their
 219           address space.
 220
 221           If unsure, say N here.
 222
 223 config EXYNOS_IOMMU_DEBUG
 224         bool "Debugging log for Exynos IOMMU"
 225         depends on EXYNOS_IOMMU
 226         help
 227           Select this to see the detailed log message that shows what
 228           happens in the IOMMU driver.
 229
 230           Say N unless you need kernel log message for IOMMU debugging.
 231
 232 config IPMMU_VMSA
 233         bool "Renesas VMSA-compatible IPMMU"
 234         depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
 235         select IOMMU_API
 236         select IOMMU_IO_PGTABLE_LPAE
 237         select ARM_DMA_USE_IOMMU
 238         help
 239           Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
 240           APE6, R-Car Gen{2,3} and RZ/G{1,2} SoCs.
 241
 242           If unsure, say N.
 243
 244 config SPAPR_TCE_IOMMU
 245         bool "sPAPR TCE IOMMU Support"
 246         depends on PPC_POWERNV || PPC_PSERIES
 247         select IOMMU_API
 248         help
 249           Enables bits of IOMMU API required by VFIO. The iommu_ops
 250           is not implemented as it is not necessary for VFIO.
 251
 252 # ARM IOMMU support
 253 config ARM_SMMU
 254         tristate "ARM Ltd. System MMU (SMMU) Support"
 255         depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64)
 256         select IOMMU_API
 257         select IOMMU_IO_PGTABLE_LPAE
 258         select ARM_DMA_USE_IOMMU if ARM
 259         help
 260           Support for implementations of the ARM System MMU architecture
 261           versions 1 and 2.
 262
 263           Say Y here if your SoC includes an IOMMU device implementing
 264           the ARM SMMU architecture.
 265
 266 config ARM_SMMU_LEGACY_DT_BINDINGS
 267         bool "Support the legacy \"mmu-masters\" devicetree bindings"
 268         depends on ARM_SMMU=y && OF
 269         help
 270           Support for the badly designed and deprecated "mmu-masters"
 271           devicetree bindings. This allows some DMA masters to attach
 272           to the SMMU but does not provide any support via the DMA API.
 273           If you're lucky, you might be able to get VFIO up and running.
 274
 275           If you say Y here then you'll make me very sad. Instead, say N
 276           and move your firmware to the utopian future that was 2016.
 277
 278 config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
 279         bool "Default to disabling bypass on ARM SMMU v1 and v2"
 280         depends on ARM_SMMU
 281         default y
 282         help
 283           Say Y here to (by default) disable bypass streams such that
 284           incoming transactions from devices that are not attached to
 285           an iommu domain will report an abort back to the device and
 286           will not be allowed to pass through the SMMU.
 287
 288           Any old kernels that existed before this KConfig was
 289           introduced would default to _allowing_ bypass (AKA the
 290           equivalent of NO for this config).  However the default for
 291           this option is YES because the old behavior is insecure.
 292
 293           There are few reasons to allow unmatched stream bypass, and
 294           even fewer good ones.  If saying YES here breaks your board
 295           you should work on fixing your board.  This KConfig option
 296           is expected to be removed in the future and we'll simply
 297           hardcode the bypass disable in the code.
 298
 299           NOTE: the kernel command line parameter
 300           'arm-smmu.disable_bypass' will continue to override this
 301           config.
 302
 303 config ARM_SMMU_V3
 304         tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 305         depends on ARM64
 306         select IOMMU_API
 307         select IOMMU_IO_PGTABLE_LPAE
 308         select GENERIC_MSI_IRQ_DOMAIN
 309         help
 310           Support for implementations of the ARM System MMU architecture
 311           version 3 providing translation support to a PCIe root complex.
 312
 313           Say Y here if your system includes an IOMMU device implementing
 314           the ARM SMMUv3 architecture.
 315
 316 config ARM_SMMU_V3_SVA
 317         bool "Shared Virtual Addressing support for the ARM SMMUv3"
 318         depends on ARM_SMMU_V3
 319         select IOMMU_SVA_LIB
 320         select MMU_NOTIFIER
 321         help
 322           Support for sharing process address spaces with devices using the
 323           SMMUv3.
 324
 325           Say Y here if your system supports SVA extensions such as PCIe PASID
 326           and PRI.
 327
 328 config S390_IOMMU
 329         def_bool y if S390 && PCI
 330         depends on S390 && PCI
 331         select IOMMU_API
 332         help
 333           Support for the IOMMU API for s390 PCI devices.
 334
 335 config S390_CCW_IOMMU
 336         bool "S390 CCW IOMMU Support"
 337         depends on S390 && CCW || COMPILE_TEST
 338         select IOMMU_API
 339         help
 340           Enables bits of IOMMU API required by VFIO. The iommu_ops
 341           is not implemented as it is not necessary for VFIO.
 342
 343 config S390_AP_IOMMU
 344         bool "S390 AP IOMMU Support"
 345         depends on S390 && ZCRYPT || COMPILE_TEST
 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 config MTK_IOMMU
 352         tristate "MediaTek IOMMU Support"
 353         depends on ARCH_MEDIATEK || COMPILE_TEST
 354         select ARM_DMA_USE_IOMMU
 355         select IOMMU_API
 356         select IOMMU_IO_PGTABLE_ARMV7S
 357         select MEMORY
 358         select MTK_SMI
 359         help
 360           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 361           Memory Management Unit. This option enables remapping of DMA memory
 362           accesses for the multimedia subsystem.
 363
 364           If unsure, say N here.
 365
 366 config MTK_IOMMU_V1
 367         tristate "MediaTek IOMMU Version 1 (M4U gen1) Support"
 368         depends on ARM
 369         depends on ARCH_MEDIATEK || COMPILE_TEST
 370         select ARM_DMA_USE_IOMMU
 371         select IOMMU_API
 372         select MEMORY
 373         select MTK_SMI
 374         help
 375           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
 376           Multimedia Memory Managememt Unit. This option enables remapping of
 377           DMA memory accesses for the multimedia subsystem.
 378
 379           if unsure, say N here.
 380
 381 config QCOM_IOMMU
 382         # Note: iommu drivers cannot (yet?) be built as modules
 383         bool "Qualcomm IOMMU Support"
 384         depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
 385         select IOMMU_API
 386         select IOMMU_IO_PGTABLE_LPAE
 387         select ARM_DMA_USE_IOMMU
 388         help
 389           Support for IOMMU on certain Qualcomm SoCs.
 390
 391 config HYPERV_IOMMU
 392         bool "Hyper-V x2APIC IRQ Handling"
 393         depends on HYPERV && X86
 394         select IOMMU_API
 395         default HYPERV
 396         help
 397           Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
 398           guests to run with x2APIC mode enabled.
 399
 400 config VIRTIO_IOMMU
 401         tristate "Virtio IOMMU driver"
 402         depends on VIRTIO
 403         depends on (ARM64 || X86)
 404         select IOMMU_API
 405         select IOMMU_DMA
 406         select INTERVAL_TREE
 407         select ACPI_VIOT if ACPI
 408         help
 409           Para-virtualised IOMMU driver with virtio.
 410
 411           Say Y here if you intend to run this kernel as a guest.
 412
 413 config SPRD_IOMMU
 414         tristate "Unisoc IOMMU Support"
 415         depends on ARCH_SPRD || COMPILE_TEST
 416         select IOMMU_API
 417         help
 418           Support for IOMMU on Unisoc's SoCs, this IOMMU can be used by
 419           Unisoc's multimedia devices, such as display, Image codec(jpeg)
 420           and a few signal processors, including VSP(video), GSP(graphic),
 421           ISP(image), and CPP(camera pixel processor), etc.
 422
 423           Say Y here if you want to use the multimedia devices listed above.
 424
 425 endif # IOMMU_SUPPORT