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 endmenu
  43
  44 config IOMMU_IOVA
  45         tristate
  46
  47 config OF_IOMMU
  48        def_bool y
  49        depends on OF && IOMMU_API
  50
  51 # IOMMU-agnostic DMA-mapping layer
  52 config IOMMU_DMA
  53         bool
  54         depends on NEED_SG_DMA_LENGTH
  55         select IOMMU_API
  56         select IOMMU_IOVA
  57
  58 config FSL_PAMU
  59         bool "Freescale IOMMU support"
  60         depends on PPC32
  61         depends on PPC_E500MC || COMPILE_TEST
  62         select IOMMU_API
  63         select GENERIC_ALLOCATOR
  64         help
  65           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  66           PAMU can authorize memory access, remap the memory address, and remap I/O
  67           transaction types.
  68
  69 # MSM IOMMU support
  70 config MSM_IOMMU
  71         bool "MSM IOMMU Support"
  72         depends on ARM
  73         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  74         depends on BROKEN
  75         select IOMMU_API
  76         help
  77           Support for the IOMMUs found on certain Qualcomm SOCs.
  78           These IOMMUs allow virtualization of the address space used by most
  79           cores within the multimedia subsystem.
  80
  81           If unsure, say N here.
  82
  83 config IOMMU_PGTABLES_L2
  84         def_bool y
  85         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  86
  87 # AMD IOMMU support
  88 config AMD_IOMMU
  89         bool "AMD IOMMU support"
  90         select SWIOTLB
  91         select PCI_MSI
  92         select PCI_ATS
  93         select PCI_PRI
  94         select PCI_PASID
  95         select IOMMU_API
  96         depends on X86_64 && PCI && ACPI
  97         ---help---
  98           With this option you can enable support for AMD IOMMU hardware in
  99           your system. An IOMMU is a hardware component which provides
 100           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 101           can isolate the DMA memory of different devices and protect the
 102           system from misbehaving device drivers or hardware.
 103
 104           You can find out if your system has an AMD IOMMU if you look into
 105           your BIOS for an option to enable it or if you have an IVRS ACPI
 106           table.
 107
 108 config AMD_IOMMU_STATS
 109         bool "Export AMD IOMMU statistics to debugfs"
 110         depends on AMD_IOMMU
 111         select DEBUG_FS
 112         ---help---
 113           This option enables code in the AMD IOMMU driver to collect various
 114           statistics about whats happening in the driver and exports that
 115           information to userspace via debugfs.
 116           If unsure, say N.
 117
 118 config AMD_IOMMU_V2
 119         tristate "AMD IOMMU Version 2 driver"
 120         depends on AMD_IOMMU
 121         select MMU_NOTIFIER
 122         ---help---
 123           This option enables support for the AMD IOMMUv2 features of the IOMMU
 124           hardware. Select this option if you want to use devices that support
 125           the PCI PRI and PASID interface.
 126
 127 # Intel IOMMU support
 128 config DMAR_TABLE
 129         bool
 130
 131 config INTEL_IOMMU
 132         bool "Support for Intel IOMMU using DMA Remapping Devices"
 133         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 134         select IOMMU_API
 135         select IOMMU_IOVA
 136         select DMAR_TABLE
 137         help
 138           DMA remapping (DMAR) devices support enables independent address
 139           translations for Direct Memory Access (DMA) from devices.
 140           These DMA remapping devices are reported via ACPI tables
 141           and include PCI device scope covered by these DMA
 142           remapping devices.
 143
 144 config INTEL_IOMMU_SVM
 145         bool "Support for Shared Virtual Memory with Intel IOMMU"
 146         depends on INTEL_IOMMU && X86
 147         select PCI_PASID
 148         select MMU_NOTIFIER
 149         help
 150           Shared Virtual Memory (SVM) provides a facility for devices
 151           to access DMA resources through process address space by
 152           means of a Process Address Space ID (PASID).
 153
 154 config INTEL_IOMMU_DEFAULT_ON
 155         def_bool y
 156         prompt "Enable Intel DMA Remapping Devices by default"
 157         depends on INTEL_IOMMU
 158         help
 159           Selecting this option will enable a DMAR device at boot time if
 160           one is found. If this option is not selected, DMAR support can
 161           be enabled by passing intel_iommu=on to the kernel.
 162
 163 config INTEL_IOMMU_BROKEN_GFX_WA
 164         bool "Workaround broken graphics drivers (going away soon)"
 165         depends on INTEL_IOMMU && BROKEN && X86
 166         ---help---
 167           Current Graphics drivers tend to use physical address
 168           for DMA and avoid using DMA APIs. Setting this config
 169           option permits the IOMMU driver to set a unity map for
 170           all the OS-visible memory. Hence the driver can continue
 171           to use physical addresses for DMA, at least until this
 172           option is removed in the 2.6.32 kernel.
 173
 174 config INTEL_IOMMU_FLOPPY_WA
 175         def_bool y
 176         depends on INTEL_IOMMU && X86
 177         ---help---
 178           Floppy disk drivers are known to bypass DMA API calls
 179           thereby failing to work when IOMMU is enabled. This
 180           workaround will setup a 1:1 mapping for the first
 181           16MiB to make floppy (an ISA device) work.
 182
 183 config IRQ_REMAP
 184         bool "Support for Interrupt Remapping"
 185         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 186         select DMAR_TABLE
 187         ---help---
 188           Supports Interrupt remapping for IO-APIC and MSI devices.
 189           To use x2apic mode in the CPU's which support x2APIC enhancements or
 190           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 191
 192 # OMAP IOMMU support
 193 config OMAP_IOMMU
 194         bool "OMAP IOMMU Support"
 195         depends on ARM && MMU
 196         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 197         select IOMMU_API
 198         ---help---
 199           The OMAP3 media platform drivers depend on iommu support,
 200           if you need them say Y here.
 201
 202 config OMAP_IOMMU_DEBUG
 203         bool "Export OMAP IOMMU internals in DebugFS"
 204         depends on OMAP_IOMMU && DEBUG_FS
 205         ---help---
 206           Select this to see extensive information about
 207           the internal state of OMAP IOMMU in debugfs.
 208
 209           Say N unless you know you need this.
 210
 211 config ROCKCHIP_IOMMU
 212         bool "Rockchip IOMMU Support"
 213         depends on ARM
 214         depends on ARCH_ROCKCHIP || COMPILE_TEST
 215         select IOMMU_API
 216         select ARM_DMA_USE_IOMMU
 217         help
 218           Support for IOMMUs found on Rockchip rk32xx SOCs.
 219           These IOMMUs allow virtualization of the address space used by most
 220           cores within the multimedia subsystem.
 221           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 222           device.
 223
 224 config TEGRA_IOMMU_GART
 225         bool "Tegra GART IOMMU Support"
 226         depends on ARCH_TEGRA_2x_SOC
 227         select IOMMU_API
 228         help
 229           Enables support for remapping discontiguous physical memory
 230           shared with the operating system into contiguous I/O virtual
 231           space through the GART (Graphics Address Relocation Table)
 232           hardware included on Tegra SoCs.
 233
 234 config TEGRA_IOMMU_SMMU
 235         bool "NVIDIA Tegra SMMU Support"
 236         depends on ARCH_TEGRA
 237         depends on TEGRA_AHB
 238         depends on TEGRA_MC
 239         select IOMMU_API
 240         help
 241           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 242           SoCs (Tegra30 up to Tegra210).
 243
 244 config EXYNOS_IOMMU
 245         bool "Exynos IOMMU Support"
 246         depends on ARCH_EXYNOS && ARM && MMU
 247         select IOMMU_API
 248         select ARM_DMA_USE_IOMMU
 249         help
 250           Support for the IOMMU (System MMU) of Samsung Exynos application
 251           processor family. This enables H/W multimedia accelerators to see
 252           non-linear physical memory chunks as linear memory in their
 253           address space.
 254
 255           If unsure, say N here.
 256
 257 config EXYNOS_IOMMU_DEBUG
 258         bool "Debugging log for Exynos IOMMU"
 259         depends on EXYNOS_IOMMU
 260         help
 261           Select this to see the detailed log message that shows what
 262           happens in the IOMMU driver.
 263
 264           Say N unless you need kernel log message for IOMMU debugging.
 265
 266 config IPMMU_VMSA
 267         bool "Renesas VMSA-compatible IPMMU"
 268         depends on ARM_LPAE
 269         depends on ARCH_SHMOBILE || COMPILE_TEST
 270         select IOMMU_API
 271         select IOMMU_IO_PGTABLE_LPAE
 272         select ARM_DMA_USE_IOMMU
 273         help
 274           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 275           R-Mobile APE6 and R-Car H2/M2 SoCs.
 276
 277           If unsure, say N.
 278
 279 config SPAPR_TCE_IOMMU
 280         bool "sPAPR TCE IOMMU Support"
 281         depends on PPC_POWERNV || PPC_PSERIES
 282         select IOMMU_API
 283         help
 284           Enables bits of IOMMU API required by VFIO. The iommu_ops
 285           is not implemented as it is not necessary for VFIO.
 286
 287 # ARM IOMMU support
 288 config ARM_SMMU
 289         bool "ARM Ltd. System MMU (SMMU) Support"
 290         depends on (ARM64 || ARM) && MMU
 291         select IOMMU_API
 292         select IOMMU_IO_PGTABLE_LPAE
 293         select ARM_DMA_USE_IOMMU if ARM
 294         help
 295           Support for implementations of the ARM System MMU architecture
 296           versions 1 and 2.
 297
 298           Say Y here if your SoC includes an IOMMU device implementing
 299           the ARM SMMU architecture.
 300
 301 config ARM_SMMU_V3
 302         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 303         depends on ARM64 && PCI
 304         select IOMMU_API
 305         select IOMMU_IO_PGTABLE_LPAE
 306         select GENERIC_MSI_IRQ_DOMAIN
 307         help
 308           Support for implementations of the ARM System MMU architecture
 309           version 3 providing translation support to a PCIe root complex.
 310
 311           Say Y here if your system includes an IOMMU device implementing
 312           the ARM SMMUv3 architecture.
 313
 314 config S390_IOMMU
 315         def_bool y if S390 && PCI
 316         depends on S390 && PCI
 317         select IOMMU_API
 318         help
 319           Support for the IOMMU API for s390 PCI devices.
 320
 321 endif # IOMMU_SUPPORT