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 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         bool
  46
  47 config OF_IOMMU
  48        def_bool y
  49        depends on OF && IOMMU_API
  50
  51 config FSL_PAMU
  52         bool "Freescale IOMMU support"
  53         depends on PPC32
  54         depends on PPC_E500MC || COMPILE_TEST
  55         select IOMMU_API
  56         select GENERIC_ALLOCATOR
  57         help
  58           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  59           PAMU can authorize memory access, remap the memory address, and remap I/O
  60           transaction types.
  61
  62 # MSM IOMMU support
  63 config MSM_IOMMU
  64         bool "MSM IOMMU Support"
  65         depends on ARM
  66         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  67         depends on BROKEN
  68         select IOMMU_API
  69         help
  70           Support for the IOMMUs found on certain Qualcomm SOCs.
  71           These IOMMUs allow virtualization of the address space used by most
  72           cores within the multimedia subsystem.
  73
  74           If unsure, say N here.
  75
  76 config IOMMU_PGTABLES_L2
  77         def_bool y
  78         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  79
  80 # AMD IOMMU support
  81 config AMD_IOMMU
  82         bool "AMD IOMMU support"
  83         select SWIOTLB
  84         select PCI_MSI
  85         select PCI_ATS
  86         select PCI_PRI
  87         select PCI_PASID
  88         select IOMMU_API
  89         depends on X86_64 && PCI && ACPI
  90         ---help---
  91           With this option you can enable support for AMD IOMMU hardware in
  92           your system. An IOMMU is a hardware component which provides
  93           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  94           can isolate the DMA memory of different devices and protect the
  95           system from misbehaving device drivers or hardware.
  96
  97           You can find out if your system has an AMD IOMMU if you look into
  98           your BIOS for an option to enable it or if you have an IVRS ACPI
  99           table.
 100
 101 config AMD_IOMMU_STATS
 102         bool "Export AMD IOMMU statistics to debugfs"
 103         depends on AMD_IOMMU
 104         select DEBUG_FS
 105         ---help---
 106           This option enables code in the AMD IOMMU driver to collect various
 107           statistics about whats happening in the driver and exports that
 108           information to userspace via debugfs.
 109           If unsure, say N.
 110
 111 config AMD_IOMMU_V2
 112         tristate "AMD IOMMU Version 2 driver"
 113         depends on AMD_IOMMU
 114         select MMU_NOTIFIER
 115         ---help---
 116           This option enables support for the AMD IOMMUv2 features of the IOMMU
 117           hardware. Select this option if you want to use devices that support
 118           the PCI PRI and PASID interface.
 119
 120 # Intel IOMMU support
 121 config DMAR_TABLE
 122         bool
 123
 124 config INTEL_IOMMU
 125         bool "Support for Intel IOMMU using DMA Remapping Devices"
 126         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 127         select IOMMU_API
 128         select IOMMU_IOVA
 129         select DMAR_TABLE
 130         help
 131           DMA remapping (DMAR) devices support enables independent address
 132           translations for Direct Memory Access (DMA) from devices.
 133           These DMA remapping devices are reported via ACPI tables
 134           and include PCI device scope covered by these DMA
 135           remapping devices.
 136
 137 config INTEL_IOMMU_DEFAULT_ON
 138         def_bool y
 139         prompt "Enable Intel DMA Remapping Devices by default"
 140         depends on INTEL_IOMMU
 141         help
 142           Selecting this option will enable a DMAR device at boot time if
 143           one is found. If this option is not selected, DMAR support can
 144           be enabled by passing intel_iommu=on to the kernel.
 145
 146 config INTEL_IOMMU_BROKEN_GFX_WA
 147         bool "Workaround broken graphics drivers (going away soon)"
 148         depends on INTEL_IOMMU && BROKEN && X86
 149         ---help---
 150           Current Graphics drivers tend to use physical address
 151           for DMA and avoid using DMA APIs. Setting this config
 152           option permits the IOMMU driver to set a unity map for
 153           all the OS-visible memory. Hence the driver can continue
 154           to use physical addresses for DMA, at least until this
 155           option is removed in the 2.6.32 kernel.
 156
 157 config INTEL_IOMMU_FLOPPY_WA
 158         def_bool y
 159         depends on INTEL_IOMMU && X86
 160         ---help---
 161           Floppy disk drivers are known to bypass DMA API calls
 162           thereby failing to work when IOMMU is enabled. This
 163           workaround will setup a 1:1 mapping for the first
 164           16MiB to make floppy (an ISA device) work.
 165
 166 config IRQ_REMAP
 167         bool "Support for Interrupt Remapping"
 168         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 169         select DMAR_TABLE
 170         ---help---
 171           Supports Interrupt remapping for IO-APIC and MSI devices.
 172           To use x2apic mode in the CPU's which support x2APIC enhancements or
 173           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 174
 175 # OMAP IOMMU support
 176 config OMAP_IOMMU
 177         bool "OMAP IOMMU Support"
 178         depends on ARM && MMU
 179         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 180         select IOMMU_API
 181         ---help---
 182           The OMAP3 media platform drivers depend on iommu support,
 183           if you need them say Y here.
 184
 185 config OMAP_IOMMU_DEBUG
 186         bool "Export OMAP IOMMU internals in DebugFS"
 187         depends on OMAP_IOMMU && DEBUG_FS
 188         ---help---
 189           Select this to see extensive information about
 190           the internal state of OMAP IOMMU in debugfs.
 191
 192           Say N unless you know you need this.
 193
 194 config ROCKCHIP_IOMMU
 195         bool "Rockchip IOMMU Support"
 196         depends on ARM
 197         depends on ARCH_ROCKCHIP || COMPILE_TEST
 198         select IOMMU_API
 199         select ARM_DMA_USE_IOMMU
 200         help
 201           Support for IOMMUs found on Rockchip rk32xx SOCs.
 202           These IOMMUs allow virtualization of the address space used by most
 203           cores within the multimedia subsystem.
 204           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 205           device.
 206
 207 config TEGRA_IOMMU_GART
 208         bool "Tegra GART IOMMU Support"
 209         depends on ARCH_TEGRA_2x_SOC
 210         select IOMMU_API
 211         help
 212           Enables support for remapping discontiguous physical memory
 213           shared with the operating system into contiguous I/O virtual
 214           space through the GART (Graphics Address Relocation Table)
 215           hardware included on Tegra SoCs.
 216
 217 config TEGRA_IOMMU_SMMU
 218         bool "NVIDIA Tegra SMMU Support"
 219         depends on ARCH_TEGRA
 220         depends on TEGRA_AHB
 221         depends on TEGRA_MC
 222         select IOMMU_API
 223         help
 224           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 225           SoCs (Tegra30 up to Tegra132).
 226
 227 config EXYNOS_IOMMU
 228         bool "Exynos IOMMU Support"
 229         depends on ARCH_EXYNOS && ARM && MMU
 230         select IOMMU_API
 231         select ARM_DMA_USE_IOMMU
 232         help
 233           Support for the IOMMU (System MMU) of Samsung Exynos application
 234           processor family. This enables H/W multimedia accelerators to see
 235           non-linear physical memory chunks as linear memory in their
 236           address space.
 237
 238           If unsure, say N here.
 239
 240 config EXYNOS_IOMMU_DEBUG
 241         bool "Debugging log for Exynos IOMMU"
 242         depends on EXYNOS_IOMMU
 243         help
 244           Select this to see the detailed log message that shows what
 245           happens in the IOMMU driver.
 246
 247           Say N unless you need kernel log message for IOMMU debugging.
 248
 249 config SHMOBILE_IPMMU
 250         bool
 251
 252 config SHMOBILE_IPMMU_TLB
 253         bool
 254
 255 config SHMOBILE_IOMMU
 256         bool "IOMMU for Renesas IPMMU/IPMMUI"
 257         default n
 258         depends on ARM && MMU
 259         depends on ARCH_SHMOBILE || COMPILE_TEST
 260         select IOMMU_API
 261         select ARM_DMA_USE_IOMMU
 262         select SHMOBILE_IPMMU
 263         select SHMOBILE_IPMMU_TLB
 264         help
 265           Support for Renesas IPMMU/IPMMUI. This option enables
 266           remapping of DMA memory accesses from all of the IP blocks
 267           on the ICB.
 268
 269           Warning: Drivers (including userspace drivers of UIO
 270           devices) of the IP blocks on the ICB *must* use addresses
 271           allocated from the IPMMU (iova) for DMA with this option
 272           enabled.
 273
 274           If unsure, say N.
 275
 276 choice
 277         prompt "IPMMU/IPMMUI address space size"
 278         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 279         depends on SHMOBILE_IOMMU
 280         help
 281           This option sets IPMMU/IPMMUI address space size by
 282           adjusting the 1st level page table size. The page table size
 283           is calculated as follows:
 284
 285               page table size = number of page table entries * 4 bytes
 286               number of page table entries = address space size / 1 MiB
 287
 288           For example, when the address space size is 2048 MiB, the
 289           1st level page table size is 8192 bytes.
 290
 291         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 292                 bool "2 GiB"
 293
 294         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 295                 bool "1 GiB"
 296
 297         config SHMOBILE_IOMMU_ADDRSIZE_512MB
 298                 bool "512 MiB"
 299
 300         config SHMOBILE_IOMMU_ADDRSIZE_256MB
 301                 bool "256 MiB"
 302
 303         config SHMOBILE_IOMMU_ADDRSIZE_128MB
 304                 bool "128 MiB"
 305
 306         config SHMOBILE_IOMMU_ADDRSIZE_64MB
 307                 bool "64 MiB"
 308
 309         config SHMOBILE_IOMMU_ADDRSIZE_32MB
 310                 bool "32 MiB"
 311
 312 endchoice
 313
 314 config SHMOBILE_IOMMU_L1SIZE
 315         int
 316         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 317         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 318         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 319         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 320         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 321         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 322         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 323
 324 config IPMMU_VMSA
 325         bool "Renesas VMSA-compatible IPMMU"
 326         depends on ARM_LPAE
 327         depends on ARCH_SHMOBILE || COMPILE_TEST
 328         select IOMMU_API
 329         select IOMMU_IO_PGTABLE_LPAE
 330         select ARM_DMA_USE_IOMMU
 331         help
 332           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 333           R-Mobile APE6 and R-Car H2/M2 SoCs.
 334
 335           If unsure, say N.
 336
 337 config SPAPR_TCE_IOMMU
 338         bool "sPAPR TCE IOMMU Support"
 339         depends on PPC_POWERNV || PPC_PSERIES
 340         select IOMMU_API
 341         help
 342           Enables bits of IOMMU API required by VFIO. The iommu_ops
 343           is not implemented as it is not necessary for VFIO.
 344
 345 # ARM IOMMU support
 346 config ARM_SMMU
 347         bool "ARM Ltd. System MMU (SMMU) Support"
 348         depends on (ARM64 || ARM) && MMU
 349         select IOMMU_API
 350         select IOMMU_IO_PGTABLE_LPAE
 351         select ARM_DMA_USE_IOMMU if ARM
 352         help
 353           Support for implementations of the ARM System MMU architecture
 354           versions 1 and 2.
 355
 356           Say Y here if your SoC includes an IOMMU device implementing
 357           the ARM SMMU architecture.
 358
 359 config ARM_SMMU_V3
 360         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 361         depends on ARM64 && PCI
 362         select IOMMU_API
 363         select IOMMU_IO_PGTABLE_LPAE
 364         help
 365           Support for implementations of the ARM System MMU architecture
 366           version 3 providing translation support to a PCIe root complex.
 367
 368           Say Y here if your system includes an IOMMU device implementing
 369           the ARM SMMUv3 architecture.
 370
 371 endif # IOMMU_SUPPORT