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         help
  27           Enable support for the ARM long descriptor pagetable format.
  28           This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
  29           sizes at both stage-1 and stage-2, as well as address spaces
  30           up to 48-bits in size.
  31
  32 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
  33         bool "LPAE selftests"
  34         depends on IOMMU_IO_PGTABLE_LPAE
  35         help
  36           Enable self-tests for LPAE page table allocator. This performs
  37           a series of page-table consistency checks during boot.
  38
  39           If unsure, say N here.
  40
  41 endmenu
  42
  43 config IOMMU_IOVA
  44         bool
  45
  46 config OF_IOMMU
  47        def_bool y
  48        depends on OF && IOMMU_API
  49
  50 config FSL_PAMU
  51         bool "Freescale IOMMU support"
  52         depends on PPC32
  53         depends on PPC_E500MC || COMPILE_TEST
  54         select IOMMU_API
  55         select GENERIC_ALLOCATOR
  56         help
  57           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  58           PAMU can authorize memory access, remap the memory address, and remap I/O
  59           transaction types.
  60
  61 # MSM IOMMU support
  62 config MSM_IOMMU
  63         bool "MSM IOMMU Support"
  64         depends on ARM
  65         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
  66         select IOMMU_API
  67         help
  68           Support for the IOMMUs found on certain Qualcomm SOCs.
  69           These IOMMUs allow virtualization of the address space used by most
  70           cores within the multimedia subsystem.
  71
  72           If unsure, say N here.
  73
  74 config IOMMU_PGTABLES_L2
  75         def_bool y
  76         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  77
  78 # AMD IOMMU support
  79 config AMD_IOMMU
  80         bool "AMD IOMMU support"
  81         select SWIOTLB
  82         select PCI_MSI
  83         select PCI_ATS
  84         select PCI_PRI
  85         select PCI_PASID
  86         select IOMMU_API
  87         depends on X86_64 && PCI && ACPI
  88         ---help---
  89           With this option you can enable support for AMD IOMMU hardware in
  90           your system. An IOMMU is a hardware component which provides
  91           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  92           can isolate the DMA memory of different devices and protect the
  93           system from misbehaving device drivers or hardware.
  94
  95           You can find out if your system has an AMD IOMMU if you look into
  96           your BIOS for an option to enable it or if you have an IVRS ACPI
  97           table.
  98
  99 config AMD_IOMMU_STATS
 100         bool "Export AMD IOMMU statistics to debugfs"
 101         depends on AMD_IOMMU
 102         select DEBUG_FS
 103         ---help---
 104           This option enables code in the AMD IOMMU driver to collect various
 105           statistics about whats happening in the driver and exports that
 106           information to userspace via debugfs.
 107           If unsure, say N.
 108
 109 config AMD_IOMMU_V2
 110         tristate "AMD IOMMU Version 2 driver"
 111         depends on AMD_IOMMU
 112         select MMU_NOTIFIER
 113         ---help---
 114           This option enables support for the AMD IOMMUv2 features of the IOMMU
 115           hardware. Select this option if you want to use devices that support
 116           the PCI PRI and PASID interface.
 117
 118 # Intel IOMMU support
 119 config DMAR_TABLE
 120         bool
 121
 122 config INTEL_IOMMU
 123         bool "Support for Intel IOMMU using DMA Remapping Devices"
 124         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 125         select IOMMU_API
 126         select IOMMU_IOVA
 127         select DMAR_TABLE
 128         help
 129           DMA remapping (DMAR) devices support enables independent address
 130           translations for Direct Memory Access (DMA) from devices.
 131           These DMA remapping devices are reported via ACPI tables
 132           and include PCI device scope covered by these DMA
 133           remapping devices.
 134
 135 config INTEL_IOMMU_DEFAULT_ON
 136         def_bool y
 137         prompt "Enable Intel DMA Remapping Devices by default"
 138         depends on INTEL_IOMMU
 139         help
 140           Selecting this option will enable a DMAR device at boot time if
 141           one is found. If this option is not selected, DMAR support can
 142           be enabled by passing intel_iommu=on to the kernel.
 143
 144 config INTEL_IOMMU_BROKEN_GFX_WA
 145         bool "Workaround broken graphics drivers (going away soon)"
 146         depends on INTEL_IOMMU && BROKEN && X86
 147         ---help---
 148           Current Graphics drivers tend to use physical address
 149           for DMA and avoid using DMA APIs. Setting this config
 150           option permits the IOMMU driver to set a unity map for
 151           all the OS-visible memory. Hence the driver can continue
 152           to use physical addresses for DMA, at least until this
 153           option is removed in the 2.6.32 kernel.
 154
 155 config INTEL_IOMMU_FLOPPY_WA
 156         def_bool y
 157         depends on INTEL_IOMMU && X86
 158         ---help---
 159           Floppy disk drivers are known to bypass DMA API calls
 160           thereby failing to work when IOMMU is enabled. This
 161           workaround will setup a 1:1 mapping for the first
 162           16MiB to make floppy (an ISA device) work.
 163
 164 config IRQ_REMAP
 165         bool "Support for Interrupt Remapping"
 166         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 167         select DMAR_TABLE
 168         ---help---
 169           Supports Interrupt remapping for IO-APIC and MSI devices.
 170           To use x2apic mode in the CPU's which support x2APIC enhancements or
 171           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 172
 173 # OMAP IOMMU support
 174 config OMAP_IOMMU
 175         bool "OMAP IOMMU Support"
 176         depends on ARM && MMU
 177         depends on ARCH_OMAP2PLUS || COMPILE_TEST
 178         select IOMMU_API
 179
 180 config OMAP_IOMMU_DEBUG
 181         bool "Export OMAP IOMMU internals in DebugFS"
 182         depends on OMAP_IOMMU && DEBUG_FS
 183         ---help---
 184           Select this to see extensive information about
 185           the internal state of OMAP IOMMU in debugfs.
 186
 187           Say N unless you know you need this.
 188
 189 config ROCKCHIP_IOMMU
 190         bool "Rockchip IOMMU Support"
 191         depends on ARM
 192         depends on ARCH_ROCKCHIP || COMPILE_TEST
 193         select IOMMU_API
 194         select ARM_DMA_USE_IOMMU
 195         help
 196           Support for IOMMUs found on Rockchip rk32xx SOCs.
 197           These IOMMUs allow virtualization of the address space used by most
 198           cores within the multimedia subsystem.
 199           Say Y here if you are using a Rockchip SoC that includes an IOMMU
 200           device.
 201
 202 config TEGRA_IOMMU_GART
 203         bool "Tegra GART IOMMU Support"
 204         depends on ARCH_TEGRA_2x_SOC
 205         select IOMMU_API
 206         help
 207           Enables support for remapping discontiguous physical memory
 208           shared with the operating system into contiguous I/O virtual
 209           space through the GART (Graphics Address Relocation Table)
 210           hardware included on Tegra SoCs.
 211
 212 config TEGRA_IOMMU_SMMU
 213         bool "NVIDIA Tegra SMMU Support"
 214         depends on ARCH_TEGRA
 215         depends on TEGRA_AHB
 216         depends on TEGRA_MC
 217         select IOMMU_API
 218         help
 219           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 220           SoCs (Tegra30 up to Tegra124).
 221
 222 config EXYNOS_IOMMU
 223         bool "Exynos IOMMU Support"
 224         depends on ARCH_EXYNOS && ARM && MMU
 225         select IOMMU_API
 226         select ARM_DMA_USE_IOMMU
 227         help
 228           Support for the IOMMU (System MMU) of Samsung Exynos application
 229           processor family. This enables H/W multimedia accelerators to see
 230           non-linear physical memory chunks as linear memory in their
 231           address space.
 232
 233           If unsure, say N here.
 234
 235 config EXYNOS_IOMMU_DEBUG
 236         bool "Debugging log for Exynos IOMMU"
 237         depends on EXYNOS_IOMMU
 238         help
 239           Select this to see the detailed log message that shows what
 240           happens in the IOMMU driver.
 241
 242           Say N unless you need kernel log message for IOMMU debugging.
 243
 244 config SHMOBILE_IPMMU
 245         bool
 246
 247 config SHMOBILE_IPMMU_TLB
 248         bool
 249
 250 config SHMOBILE_IOMMU
 251         bool "IOMMU for Renesas IPMMU/IPMMUI"
 252         default n
 253         depends on ARM && MMU
 254         depends on ARCH_SHMOBILE || COMPILE_TEST
 255         select IOMMU_API
 256         select ARM_DMA_USE_IOMMU
 257         select SHMOBILE_IPMMU
 258         select SHMOBILE_IPMMU_TLB
 259         help
 260           Support for Renesas IPMMU/IPMMUI. This option enables
 261           remapping of DMA memory accesses from all of the IP blocks
 262           on the ICB.
 263
 264           Warning: Drivers (including userspace drivers of UIO
 265           devices) of the IP blocks on the ICB *must* use addresses
 266           allocated from the IPMMU (iova) for DMA with this option
 267           enabled.
 268
 269           If unsure, say N.
 270
 271 choice
 272         prompt "IPMMU/IPMMUI address space size"
 273         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 274         depends on SHMOBILE_IOMMU
 275         help
 276           This option sets IPMMU/IPMMUI address space size by
 277           adjusting the 1st level page table size. The page table size
 278           is calculated as follows:
 279
 280               page table size = number of page table entries * 4 bytes
 281               number of page table entries = address space size / 1 MiB
 282
 283           For example, when the address space size is 2048 MiB, the
 284           1st level page table size is 8192 bytes.
 285
 286         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 287                 bool "2 GiB"
 288
 289         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 290                 bool "1 GiB"
 291
 292         config SHMOBILE_IOMMU_ADDRSIZE_512MB
 293                 bool "512 MiB"
 294
 295         config SHMOBILE_IOMMU_ADDRSIZE_256MB
 296                 bool "256 MiB"
 297
 298         config SHMOBILE_IOMMU_ADDRSIZE_128MB
 299                 bool "128 MiB"
 300
 301         config SHMOBILE_IOMMU_ADDRSIZE_64MB
 302                 bool "64 MiB"
 303
 304         config SHMOBILE_IOMMU_ADDRSIZE_32MB
 305                 bool "32 MiB"
 306
 307 endchoice
 308
 309 config SHMOBILE_IOMMU_L1SIZE
 310         int
 311         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 312         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 313         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 314         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 315         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 316         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 317         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 318
 319 config IPMMU_VMSA
 320         bool "Renesas VMSA-compatible IPMMU"
 321         depends on ARM_LPAE
 322         depends on ARCH_SHMOBILE || COMPILE_TEST
 323         select IOMMU_API
 324         select IOMMU_IO_PGTABLE_LPAE
 325         select ARM_DMA_USE_IOMMU
 326         help
 327           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 328           R-Mobile APE6 and R-Car H2/M2 SoCs.
 329
 330           If unsure, say N.
 331
 332 config SPAPR_TCE_IOMMU
 333         bool "sPAPR TCE IOMMU Support"
 334         depends on PPC_POWERNV || PPC_PSERIES
 335         select IOMMU_API
 336         help
 337           Enables bits of IOMMU API required by VFIO. The iommu_ops
 338           is not implemented as it is not necessary for VFIO.
 339
 340 config ARM_SMMU
 341         bool "ARM Ltd. System MMU (SMMU) Support"
 342         depends on (ARM64 || ARM) && MMU
 343         select IOMMU_API
 344         select IOMMU_IO_PGTABLE_LPAE
 345         select ARM_DMA_USE_IOMMU if ARM
 346         help
 347           Support for implementations of the ARM System MMU architecture
 348           versions 1 and 2.
 349
 350           Say Y here if your SoC includes an IOMMU device implementing
 351           the ARM SMMU architecture.
 352
 353 endif # IOMMU_SUPPORT