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