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         # SWIOTLB guarantees a dma_to_phys() implementation
  27         depends on ARM || ARM64 || (COMPILE_TEST && SWIOTLB)
  28         help
  29           Enable support for the ARM long descriptor pagetable format.
  30           This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
  31           sizes at both stage-1 and stage-2, as well as address spaces
  32           up to 48-bits in size.
  33
  34 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
  35         bool "LPAE selftests"
  36         depends on IOMMU_IO_PGTABLE_LPAE
  37         help
  38           Enable self-tests for LPAE page table allocator. This performs
  39           a series of page-table consistency checks during boot.
  40
  41           If unsure, say N here.
  42
  43 endmenu
  44
  45 config IOMMU_IOVA
  46         bool
  47
  48 config OF_IOMMU
  49        def_bool y
  50        depends on OF && IOMMU_API
  51
  52 config FSL_PAMU
  53         bool "Freescale IOMMU support"
  54         depends on PPC32
  55         depends on PPC_E500MC || COMPILE_TEST
  56         select IOMMU_API
  57         select GENERIC_ALLOCATOR
  58         help
  59           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  60           PAMU can authorize memory access, remap the memory address, and remap I/O
  61           transaction types.
  62
  63 # MSM IOMMU support
  64 config MSM_IOMMU
  65         bool "MSM IOMMU Support"
  66         depends on ARM
  67         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  68         depends on BROKEN
  69         select IOMMU_API
  70         help
  71           Support for the IOMMUs found on certain Qualcomm SOCs.
  72           These IOMMUs allow virtualization of the address space used by most
  73           cores within the multimedia subsystem.
  74
  75           If unsure, say N here.
  76
  77 config IOMMU_PGTABLES_L2
  78         def_bool y
  79         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  80
  81 # AMD IOMMU support
  82 config AMD_IOMMU
  83         bool "AMD IOMMU support"
  84         select SWIOTLB
  85         select PCI_MSI
  86         select PCI_ATS
  87         select PCI_PRI
  88         select PCI_PASID
  89         select IOMMU_API
  90         depends on X86_64 && PCI && ACPI
  91         ---help---
  92           With this option you can enable support for AMD IOMMU hardware in
  93           your system. An IOMMU is a hardware component which provides
  94           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  95           can isolate the DMA memory of different devices and protect the
  96           system from misbehaving device drivers or hardware.
  97
  98           You can find out if your system has an AMD IOMMU if you look into
  99           your BIOS for an option to enable it or if you have an IVRS ACPI
 100           table.
 101
 102 config AMD_IOMMU_STATS
 103         bool "Export AMD IOMMU statistics to debugfs"
 104         depends on AMD_IOMMU
 105         select DEBUG_FS
 106         ---help---
 107           This option enables code in the AMD IOMMU driver to collect various
 108           statistics about whats happening in the driver and exports that
 109           information to userspace via debugfs.
 110           If unsure, say N.
 111
 112 config AMD_IOMMU_V2
 113         tristate "AMD IOMMU Version 2 driver"
 114         depends on AMD_IOMMU
 115         select MMU_NOTIFIER
 116         ---help---
 117           This option enables support for the AMD IOMMUv2 features of the IOMMU
 118           hardware. Select this option if you want to use devices that support
 119           the PCI PRI and PASID interface.
 120
 121 # Intel IOMMU support
 122 config DMAR_TABLE
 123         bool
 124
 125 config INTEL_IOMMU
 126         bool "Support for Intel IOMMU using DMA Remapping Devices"
 127         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 128         select IOMMU_API
 129         select IOMMU_IOVA
 130         select DMAR_TABLE
 131         help
 132           DMA remapping (DMAR) devices support enables independent address
 133           translations for Direct Memory Access (DMA) from devices.
 134           These DMA remapping devices are reported via ACPI tables
 135           and include PCI device scope covered by these DMA
 136           remapping devices.
 137
 138 config INTEL_IOMMU_DEFAULT_ON
 139         def_bool y
 140         prompt "Enable Intel DMA Remapping Devices by default"
 141         depends on INTEL_IOMMU
 142         help
 143           Selecting this option will enable a DMAR device at boot time if
 144           one is found. If this option is not selected, DMAR support can
 145           be enabled by passing intel_iommu=on to the kernel.
 146
 147 config INTEL_IOMMU_BROKEN_GFX_WA
 148         bool "Workaround broken graphics drivers (going away soon)"
 149         depends on INTEL_IOMMU && BROKEN && X86
 150         ---help---
 151           Current Graphics drivers tend to use physical address
 152           for DMA and avoid using DMA APIs. Setting this config
 153           option permits the IOMMU driver to set a unity map for
 154           all the OS-visible memory. Hence the driver can continue
 155           to use physical addresses for DMA, at least until this
 156           option is removed in the 2.6.32 kernel.
 157
 158 config INTEL_IOMMU_FLOPPY_WA
 159         def_bool y
 160         depends on INTEL_IOMMU && X86
 161         ---help---
 162           Floppy disk drivers are known to bypass DMA API calls
 163           thereby failing to work when IOMMU is enabled. This
 164           workaround will setup a 1:1 mapping for the first
 165           16MiB to make floppy (an ISA device) work.
 166
 167 config IRQ_REMAP
 168         bool "Support for Interrupt Remapping"
 169         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 170         select DMAR_TABLE
 171         ---help---
 172           Supports Interrupt remapping for IO-APIC and MSI devices.
 173           To use x2apic mode in the CPU's which support x2APIC enhancements or
 174           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 175
 176 # OMAP IOMMU support
 177 config OMAP_IOMMU
 178         bool "OMAP IOMMU Support"
 179         depends on ARM && MMU
 180         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 181         select IOMMU_API
 182         ---help---
 183           The OMAP3 media platform drivers depend on iommu support,
 184           if you need them say Y here.
 185
 186 config OMAP_IOMMU_DEBUG
 187         bool "Export OMAP IOMMU internals in DebugFS"
 188         depends on OMAP_IOMMU && DEBUG_FS
 189         ---help---
 190           Select this to see extensive information about
 191           the internal state of OMAP IOMMU in debugfs.
 192
 193           Say N unless you know you need this.
 194
 195 config ROCKCHIP_IOMMU
 196         bool "Rockchip IOMMU Support"
 197         depends on ARM
 198         depends on ARCH_ROCKCHIP || COMPILE_TEST
 199         select IOMMU_API
 200         select ARM_DMA_USE_IOMMU
 201         help
 202           Support for IOMMUs found on Rockchip rk32xx SOCs.
 203           These IOMMUs allow virtualization of the address space used by most
 204           cores within the multimedia subsystem.
 205           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 206           device.
 207
 208 config TEGRA_IOMMU_GART
 209         bool "Tegra GART IOMMU Support"
 210         depends on ARCH_TEGRA_2x_SOC
 211         select IOMMU_API
 212         help
 213           Enables support for remapping discontiguous physical memory
 214           shared with the operating system into contiguous I/O virtual
 215           space through the GART (Graphics Address Relocation Table)
 216           hardware included on Tegra SoCs.
 217
 218 config TEGRA_IOMMU_SMMU
 219         bool "NVIDIA Tegra SMMU Support"
 220         depends on ARCH_TEGRA
 221         depends on TEGRA_AHB
 222         depends on TEGRA_MC
 223         select IOMMU_API
 224         help
 225           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 226           SoCs (Tegra30 up to Tegra132).
 227
 228 config EXYNOS_IOMMU
 229         bool "Exynos IOMMU Support"
 230         depends on ARCH_EXYNOS && ARM && MMU
 231         select IOMMU_API
 232         select ARM_DMA_USE_IOMMU
 233         help
 234           Support for the IOMMU (System MMU) of Samsung Exynos application
 235           processor family. This enables H/W multimedia accelerators to see
 236           non-linear physical memory chunks as linear memory in their
 237           address space.
 238
 239           If unsure, say N here.
 240
 241 config EXYNOS_IOMMU_DEBUG
 242         bool "Debugging log for Exynos IOMMU"
 243         depends on EXYNOS_IOMMU
 244         help
 245           Select this to see the detailed log message that shows what
 246           happens in the IOMMU driver.
 247
 248           Say N unless you need kernel log message for IOMMU debugging.
 249
 250 config SHMOBILE_IPMMU
 251         bool
 252
 253 config SHMOBILE_IPMMU_TLB
 254         bool
 255
 256 config SHMOBILE_IOMMU
 257         bool "IOMMU for Renesas IPMMU/IPMMUI"
 258         default n
 259         depends on ARM && MMU
 260         depends on ARCH_SHMOBILE || COMPILE_TEST
 261         select IOMMU_API
 262         select ARM_DMA_USE_IOMMU
 263         select SHMOBILE_IPMMU
 264         select SHMOBILE_IPMMU_TLB
 265         help
 266           Support for Renesas IPMMU/IPMMUI. This option enables
 267           remapping of DMA memory accesses from all of the IP blocks
 268           on the ICB.
 269
 270           Warning: Drivers (including userspace drivers of UIO
 271           devices) of the IP blocks on the ICB *must* use addresses
 272           allocated from the IPMMU (iova) for DMA with this option
 273           enabled.
 274
 275           If unsure, say N.
 276
 277 choice
 278         prompt "IPMMU/IPMMUI address space size"
 279         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 280         depends on SHMOBILE_IOMMU
 281         help
 282           This option sets IPMMU/IPMMUI address space size by
 283           adjusting the 1st level page table size. The page table size
 284           is calculated as follows:
 285
 286               page table size = number of page table entries * 4 bytes
 287               number of page table entries = address space size / 1 MiB
 288
 289           For example, when the address space size is 2048 MiB, the
 290           1st level page table size is 8192 bytes.
 291
 292         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 293                 bool "2 GiB"
 294
 295         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 296                 bool "1 GiB"
 297
 298         config SHMOBILE_IOMMU_ADDRSIZE_512MB
 299                 bool "512 MiB"
 300
 301         config SHMOBILE_IOMMU_ADDRSIZE_256MB
 302                 bool "256 MiB"
 303
 304         config SHMOBILE_IOMMU_ADDRSIZE_128MB
 305                 bool "128 MiB"
 306
 307         config SHMOBILE_IOMMU_ADDRSIZE_64MB
 308                 bool "64 MiB"
 309
 310         config SHMOBILE_IOMMU_ADDRSIZE_32MB
 311                 bool "32 MiB"
 312
 313 endchoice
 314
 315 config SHMOBILE_IOMMU_L1SIZE
 316         int
 317         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 318         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 319         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 320         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 321         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 322         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 323         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 324
 325 config IPMMU_VMSA
 326         bool "Renesas VMSA-compatible IPMMU"
 327         depends on ARM_LPAE
 328         depends on ARCH_SHMOBILE || COMPILE_TEST
 329         select IOMMU_API
 330         select IOMMU_IO_PGTABLE_LPAE
 331         select ARM_DMA_USE_IOMMU
 332         help
 333           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 334           R-Mobile APE6 and R-Car H2/M2 SoCs.
 335
 336           If unsure, say N.
 337
 338 config SPAPR_TCE_IOMMU
 339         bool "sPAPR TCE IOMMU Support"
 340         depends on PPC_POWERNV || PPC_PSERIES
 341         select IOMMU_API
 342         help
 343           Enables bits of IOMMU API required by VFIO. The iommu_ops
 344           is not implemented as it is not necessary for VFIO.
 345
 346 # ARM IOMMU support
 347 config ARM_SMMU
 348         bool "ARM Ltd. System MMU (SMMU) Support"
 349         depends on (ARM64 || ARM) && MMU
 350         select IOMMU_API
 351         select IOMMU_IO_PGTABLE_LPAE
 352         select ARM_DMA_USE_IOMMU if ARM
 353         help
 354           Support for implementations of the ARM System MMU architecture
 355           versions 1 and 2.
 356
 357           Say Y here if your SoC includes an IOMMU device implementing
 358           the ARM SMMU architecture.
 359
 360 config ARM_SMMU_V3
 361         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
 362         depends on ARM64 && PCI
 363         select IOMMU_API
 364         select IOMMU_IO_PGTABLE_LPAE
 365         help
 366           Support for implementations of the ARM System MMU architecture
 367           version 3 providing translation support to a PCIe root complex.
 368
 369           Say Y here if your system includes an IOMMU device implementing
 370           the ARM SMMUv3 architecture.
 371
 372 endif # IOMMU_SUPPORT