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 PPC32
  80         depends on PPC_E500MC || COMPILE_TEST
  81         select IOMMU_API
  82         select GENERIC_ALLOCATOR
  83         help
  84           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  85           PAMU can authorize memory access, remap the memory address, and remap I/O
  86           transaction types.
  87
  88 # MSM IOMMU support
  89 config MSM_IOMMU
  90         bool "MSM IOMMU Support"
  91         depends on ARM
  92         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  93         depends on BROKEN
  94         select IOMMU_API
  95         help
  96           Support for the IOMMUs found on certain Qualcomm SOCs.
  97           These IOMMUs allow virtualization of the address space used by most
  98           cores within the multimedia subsystem.
  99
 100           If unsure, say N here.
 101
 102 config IOMMU_PGTABLES_L2
 103         def_bool y
 104         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 105
 106 # AMD IOMMU support
 107 config AMD_IOMMU
 108         bool "AMD IOMMU support"
 109         select SWIOTLB
 110         select PCI_MSI
 111         select PCI_ATS
 112         select PCI_PRI
 113         select PCI_PASID
 114         select IOMMU_API
 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_STATS
 128         bool "Export AMD IOMMU statistics to debugfs"
 129         depends on AMD_IOMMU
 130         select DEBUG_FS
 131         ---help---
 132           This option enables code in the AMD IOMMU driver to collect various
 133           statistics about whats happening in the driver and exports that
 134           information to userspace via debugfs.
 135           If unsure, say N.
 136
 137 config AMD_IOMMU_V2
 138         tristate "AMD IOMMU Version 2 driver"
 139         depends on AMD_IOMMU
 140         select MMU_NOTIFIER
 141         ---help---
 142           This option enables support for the AMD IOMMUv2 features of the IOMMU
 143           hardware. Select this option if you want to use devices that support
 144           the PCI PRI and PASID interface.
 145
 146 # Intel IOMMU support
 147 config DMAR_TABLE
 148         bool
 149
 150 config INTEL_IOMMU
 151         bool "Support for Intel IOMMU using DMA Remapping Devices"
 152         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 153         select IOMMU_API
 154         select IOMMU_IOVA
 155         select DMAR_TABLE
 156         help
 157           DMA remapping (DMAR) devices support enables independent address
 158           translations for Direct Memory Access (DMA) from devices.
 159           These DMA remapping devices are reported via ACPI tables
 160           and include PCI device scope covered by these DMA
 161           remapping devices.
 162
 163 config INTEL_IOMMU_SVM
 164         bool "Support for Shared Virtual Memory with Intel IOMMU"
 165         depends on INTEL_IOMMU && X86
 166         select PCI_PASID
 167         select MMU_NOTIFIER
 168         help
 169           Shared Virtual Memory (SVM) provides a facility for devices
 170           to access DMA resources through process address space by
 171           means of a Process Address Space ID (PASID).
 172
 173 config INTEL_IOMMU_DEFAULT_ON
 174         def_bool y
 175         prompt "Enable Intel DMA Remapping Devices by default"
 176         depends on INTEL_IOMMU
 177         help
 178           Selecting this option will enable a DMAR device at boot time if
 179           one is found. If this option is not selected, DMAR support can
 180           be enabled by passing intel_iommu=on to the kernel.
 181
 182 config INTEL_IOMMU_BROKEN_GFX_WA
 183         bool "Workaround broken graphics drivers (going away soon)"
 184         depends on INTEL_IOMMU && BROKEN && X86
 185         ---help---
 186           Current Graphics drivers tend to use physical address
 187           for DMA and avoid using DMA APIs. Setting this config
 188           option permits the IOMMU driver to set a unity map for
 189           all the OS-visible memory. Hence the driver can continue
 190           to use physical addresses for DMA, at least until this
 191           option is removed in the 2.6.32 kernel.
 192
 193 config INTEL_IOMMU_FLOPPY_WA
 194         def_bool y
 195         depends on INTEL_IOMMU && X86
 196         ---help---
 197           Floppy disk drivers are known to bypass DMA API calls
 198           thereby failing to work when IOMMU is enabled. This
 199           workaround will setup a 1:1 mapping for the first
 200           16MiB to make floppy (an ISA device) work.
 201
 202 config IRQ_REMAP
 203         bool "Support for Interrupt Remapping"
 204         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 205         select DMAR_TABLE
 206         ---help---
 207           Supports Interrupt remapping for IO-APIC and MSI devices.
 208           To use x2apic mode in the CPU's which support x2APIC enhancements or
 209           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 210
 211 # OMAP IOMMU support
 212 config OMAP_IOMMU
 213         bool "OMAP IOMMU Support"
 214         depends on ARM && MMU
 215         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 216         select IOMMU_API
 217         ---help---
 218           The OMAP3 media platform drivers depend on iommu support,
 219           if you need them say Y here.
 220
 221 config OMAP_IOMMU_DEBUG
 222         bool "Export OMAP IOMMU internals in DebugFS"
 223         depends on OMAP_IOMMU && DEBUG_FS
 224         ---help---
 225           Select this to see extensive information about
 226           the internal state of OMAP IOMMU in debugfs.
 227
 228           Say N unless you know you need this.
 229
 230 config ROCKCHIP_IOMMU
 231         bool "Rockchip IOMMU Support"
 232         depends on ARM
 233         depends on ARCH_ROCKCHIP || COMPILE_TEST
 234         select IOMMU_API
 235         select ARM_DMA_USE_IOMMU
 236         help
 237           Support for IOMMUs found on Rockchip rk32xx SOCs.
 238           These IOMMUs allow virtualization of the address space used by most
 239           cores within the multimedia subsystem.
 240           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 241           device.
 242
 243 config TEGRA_IOMMU_GART
 244         bool "Tegra GART IOMMU Support"
 245         depends on ARCH_TEGRA_2x_SOC
 246         select IOMMU_API
 247         help
 248           Enables support for remapping discontiguous physical memory
 249           shared with the operating system into contiguous I/O virtual
 250           space through the GART (Graphics Address Relocation Table)
 251           hardware included on Tegra SoCs.
 252
 253 config TEGRA_IOMMU_SMMU
 254         bool "NVIDIA Tegra SMMU Support"
 255         depends on ARCH_TEGRA
 256         depends on TEGRA_AHB
 257         depends on TEGRA_MC
 258         select IOMMU_API
 259         help
 260           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 261           SoCs (Tegra30 up to Tegra210).
 262
 263 config EXYNOS_IOMMU
 264         bool "Exynos IOMMU Support"
 265         depends on ARCH_EXYNOS && MMU
 266         select IOMMU_API
 267         select ARM_DMA_USE_IOMMU
 268         help
 269           Support for the IOMMU (System MMU) of Samsung Exynos application
 270           processor family. This enables H/W multimedia accelerators to see
 271           non-linear physical memory chunks as linear memory in their
 272           address space.
 273
 274           If unsure, say N here.
 275
 276 config EXYNOS_IOMMU_DEBUG
 277         bool "Debugging log for Exynos IOMMU"
 278         depends on EXYNOS_IOMMU
 279         help
 280           Select this to see the detailed log message that shows what
 281           happens in the IOMMU driver.
 282
 283           Say N unless you need kernel log message for IOMMU debugging.
 284
 285 config IPMMU_VMSA
 286         bool "Renesas VMSA-compatible IPMMU"
 287         depends on ARM_LPAE
 288         depends on ARCH_RENESAS || COMPILE_TEST
 289         select IOMMU_API
 290         select IOMMU_IO_PGTABLE_LPAE
 291         select ARM_DMA_USE_IOMMU
 292         help
 293           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 294           R-Mobile APE6 and R-Car H2/M2 SoCs.
 295
 296           If unsure, say N.
 297
 298 config SPAPR_TCE_IOMMU
 299         bool "sPAPR TCE IOMMU Support"
 300         depends on PPC_POWERNV || PPC_PSERIES
 301         select IOMMU_API
 302         help
 303           Enables bits of IOMMU API required by VFIO. The iommu_ops
 304           is not implemented as it is not necessary for VFIO.
 305
 306 # ARM IOMMU support
 307 config ARM_SMMU
 308         bool "ARM Ltd. System MMU (SMMU) Support"
 309         depends on (ARM64 || ARM) && MMU
 310         select IOMMU_API
 311         select IOMMU_IO_PGTABLE_LPAE
 312         select ARM_DMA_USE_IOMMU if ARM
 313         help
 314           Support for implementations of the ARM System MMU architecture
 315           versions 1 and 2.
 316
 317           Say Y here if your SoC includes an IOMMU device implementing
 318           the ARM SMMU architecture.
 319
 320 config ARM_SMMU_V3
 321         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 322         depends on ARM64 && PCI
 323         select IOMMU_API
 324         select IOMMU_IO_PGTABLE_LPAE
 325         select GENERIC_MSI_IRQ_DOMAIN
 326         help
 327           Support for implementations of the ARM System MMU architecture
 328           version 3 providing translation support to a PCIe root complex.
 329
 330           Say Y here if your system includes an IOMMU device implementing
 331           the ARM SMMUv3 architecture.
 332
 333 config S390_IOMMU
 334         def_bool y if S390 && PCI
 335         depends on S390 && PCI
 336         select IOMMU_API
 337         help
 338           Support for the IOMMU API for s390 PCI devices.
 339
 340 config MTK_IOMMU
 341         bool "MTK IOMMU Support"
 342         depends on ARM || ARM64
 343         depends on ARCH_MEDIATEK || COMPILE_TEST
 344         select ARM_DMA_USE_IOMMU
 345         select IOMMU_API
 346         select IOMMU_DMA
 347         select IOMMU_IO_PGTABLE_ARMV7S
 348         select MEMORY
 349         select MTK_SMI
 350         help
 351           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
 352           Memory Management Unit. This option enables remapping of DMA memory
 353           accesses for the multimedia subsystem.
 354
 355           If unsure, say N here.
 356
 357 endif # IOMMU_SUPPORT