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         default y
   8         ---help---
   9           Say Y here if you want to compile device drivers for IO Memory
  10           Management Units into the kernel. These devices usually allow to
  11           remap DMA requests and/or remap interrupts from other devices on the
  12           system.
  13
  14 if IOMMU_SUPPORT
  15
  16 config OF_IOMMU
  17        def_bool y
  18        depends on OF
  19
  20 config FSL_PAMU
  21         bool "Freescale IOMMU support"
  22         depends on PPC_E500MC
  23         select IOMMU_API
  24         select GENERIC_ALLOCATOR
  25         help
  26           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  27           PAMU can authorize memory access, remap the memory address, and remap I/O
  28           transaction types.
  29
  30 # MSM IOMMU support
  31 config MSM_IOMMU
  32         bool "MSM IOMMU Support"
  33         depends on ARCH_MSM8X60 || ARCH_MSM8960
  34         select IOMMU_API
  35         help
  36           Support for the IOMMUs found on certain Qualcomm SOCs.
  37           These IOMMUs allow virtualization of the address space used by most
  38           cores within the multimedia subsystem.
  39
  40           If unsure, say N here.
  41
  42 config IOMMU_PGTABLES_L2
  43         def_bool y
  44         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  45
  46 # AMD IOMMU support
  47 config AMD_IOMMU
  48         bool "AMD IOMMU support"
  49         select SWIOTLB
  50         select PCI_MSI
  51         select PCI_ATS
  52         select PCI_PRI
  53         select PCI_PASID
  54         select IOMMU_API
  55         depends on X86_64 && PCI && ACPI
  56         ---help---
  57           With this option you can enable support for AMD IOMMU hardware in
  58           your system. An IOMMU is a hardware component which provides
  59           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  60           can isolate the DMA memory of different devices and protect the
  61           system from misbehaving device drivers or hardware.
  62
  63           You can find out if your system has an AMD IOMMU if you look into
  64           your BIOS for an option to enable it or if you have an IVRS ACPI
  65           table.
  66
  67 config AMD_IOMMU_STATS
  68         bool "Export AMD IOMMU statistics to debugfs"
  69         depends on AMD_IOMMU
  70         select DEBUG_FS
  71         ---help---
  72           This option enables code in the AMD IOMMU driver to collect various
  73           statistics about whats happening in the driver and exports that
  74           information to userspace via debugfs.
  75           If unsure, say N.
  76
  77 config AMD_IOMMU_V2
  78         tristate "AMD IOMMU Version 2 driver"
  79         depends on AMD_IOMMU
  80         select MMU_NOTIFIER
  81         ---help---
  82           This option enables support for the AMD IOMMUv2 features of the IOMMU
  83           hardware. Select this option if you want to use devices that support
  84           the PCI PRI and PASID interface.
  85
  86 # Intel IOMMU support
  87 config DMAR_TABLE
  88         bool
  89
  90 config INTEL_IOMMU
  91         bool "Support for Intel IOMMU using DMA Remapping Devices"
  92         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
  93         select IOMMU_API
  94         select DMAR_TABLE
  95         help
  96           DMA remapping (DMAR) devices support enables independent address
  97           translations for Direct Memory Access (DMA) from devices.
  98           These DMA remapping devices are reported via ACPI tables
  99           and include PCI device scope covered by these DMA
 100           remapping devices.
 101
 102 config INTEL_IOMMU_DEFAULT_ON
 103         def_bool y
 104         prompt "Enable Intel DMA Remapping Devices by default"
 105         depends on INTEL_IOMMU
 106         help
 107           Selecting this option will enable a DMAR device at boot time if
 108           one is found. If this option is not selected, DMAR support can
 109           be enabled by passing intel_iommu=on to the kernel.
 110
 111 config INTEL_IOMMU_BROKEN_GFX_WA
 112         bool "Workaround broken graphics drivers (going away soon)"
 113         depends on INTEL_IOMMU && BROKEN && X86
 114         ---help---
 115           Current Graphics drivers tend to use physical address
 116           for DMA and avoid using DMA APIs. Setting this config
 117           option permits the IOMMU driver to set a unity map for
 118           all the OS-visible memory. Hence the driver can continue
 119           to use physical addresses for DMA, at least until this
 120           option is removed in the 2.6.32 kernel.
 121
 122 config INTEL_IOMMU_FLOPPY_WA
 123         def_bool y
 124         depends on INTEL_IOMMU && X86
 125         ---help---
 126           Floppy disk drivers are known to bypass DMA API calls
 127           thereby failing to work when IOMMU is enabled. This
 128           workaround will setup a 1:1 mapping for the first
 129           16MiB to make floppy (an ISA device) work.
 130
 131 config IRQ_REMAP
 132         bool "Support for Interrupt Remapping"
 133         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 134         select DMAR_TABLE
 135         ---help---
 136           Supports Interrupt remapping for IO-APIC and MSI devices.
 137           To use x2apic mode in the CPU's which support x2APIC enhancements or
 138           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 139
 140 # OMAP IOMMU support
 141 config OMAP_IOMMU
 142         bool "OMAP IOMMU Support"
 143         depends on ARCH_OMAP2PLUS
 144         select IOMMU_API
 145
 146 config OMAP_IOMMU_DEBUG
 147        tristate "Export OMAP IOMMU internals in DebugFS"
 148        depends on OMAP_IOMMU && DEBUG_FS
 149        help
 150          Select this to see extensive information about
 151          the internal state of OMAP IOMMU in debugfs.
 152
 153          Say N unless you know you need this.
 154
 155 config TEGRA_IOMMU_GART
 156         bool "Tegra GART IOMMU Support"
 157         depends on ARCH_TEGRA_2x_SOC
 158         select IOMMU_API
 159         help
 160           Enables support for remapping discontiguous physical memory
 161           shared with the operating system into contiguous I/O virtual
 162           space through the GART (Graphics Address Relocation Table)
 163           hardware included on Tegra SoCs.
 164
 165 config TEGRA_IOMMU_SMMU
 166         bool "NVIDIA Tegra SMMU Support"
 167         depends on ARCH_TEGRA
 168         depends on TEGRA_AHB
 169         depends on TEGRA_MC
 170         select IOMMU_API
 171         help
 172           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
 173           SoCs (Tegra30 up to Tegra124).
 174
 175 config EXYNOS_IOMMU
 176         bool "Exynos IOMMU Support"
 177         depends on ARCH_EXYNOS && ARM
 178         select IOMMU_API
 179         select ARM_DMA_USE_IOMMU
 180         help
 181           Support for the IOMMU (System MMU) of Samsung Exynos application
 182           processor family. This enables H/W multimedia accelerators to see
 183           non-linear physical memory chunks as linear memory in their
 184           address space.
 185
 186           If unsure, say N here.
 187
 188 config EXYNOS_IOMMU_DEBUG
 189         bool "Debugging log for Exynos IOMMU"
 190         depends on EXYNOS_IOMMU
 191         help
 192           Select this to see the detailed log message that shows what
 193           happens in the IOMMU driver.
 194
 195           Say N unless you need kernel log message for IOMMU debugging.
 196
 197 config SHMOBILE_IPMMU
 198         bool
 199
 200 config SHMOBILE_IPMMU_TLB
 201         bool
 202
 203 config SHMOBILE_IOMMU
 204         bool "IOMMU for Renesas IPMMU/IPMMUI"
 205         default n
 206         depends on ARM
 207         depends on ARCH_SHMOBILE || COMPILE_TEST
 208         select IOMMU_API
 209         select ARM_DMA_USE_IOMMU
 210         select SHMOBILE_IPMMU
 211         select SHMOBILE_IPMMU_TLB
 212         help
 213           Support for Renesas IPMMU/IPMMUI. This option enables
 214           remapping of DMA memory accesses from all of the IP blocks
 215           on the ICB.
 216
 217           Warning: Drivers (including userspace drivers of UIO
 218           devices) of the IP blocks on the ICB *must* use addresses
 219           allocated from the IPMMU (iova) for DMA with this option
 220           enabled.
 221
 222           If unsure, say N.
 223
 224 choice
 225         prompt "IPMMU/IPMMUI address space size"
 226         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 227         depends on SHMOBILE_IOMMU
 228         help
 229           This option sets IPMMU/IPMMUI address space size by
 230           adjusting the 1st level page table size. The page table size
 231           is calculated as follows:
 232
 233               page table size = number of page table entries * 4 bytes
 234               number of page table entries = address space size / 1 MiB
 235
 236           For example, when the address space size is 2048 MiB, the
 237           1st level page table size is 8192 bytes.
 238
 239         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 240                 bool "2 GiB"
 241
 242         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 243                 bool "1 GiB"
 244
 245         config SHMOBILE_IOMMU_ADDRSIZE_512MB
 246                 bool "512 MiB"
 247
 248         config SHMOBILE_IOMMU_ADDRSIZE_256MB
 249                 bool "256 MiB"
 250
 251         config SHMOBILE_IOMMU_ADDRSIZE_128MB
 252                 bool "128 MiB"
 253
 254         config SHMOBILE_IOMMU_ADDRSIZE_64MB
 255                 bool "64 MiB"
 256
 257         config SHMOBILE_IOMMU_ADDRSIZE_32MB
 258                 bool "32 MiB"
 259
 260 endchoice
 261
 262 config SHMOBILE_IOMMU_L1SIZE
 263         int
 264         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 265         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 266         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 267         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 268         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 269         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 270         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 271
 272 config IPMMU_VMSA
 273         bool "Renesas VMSA-compatible IPMMU"
 274         depends on ARM_LPAE
 275         depends on ARCH_SHMOBILE || COMPILE_TEST
 276         select IOMMU_API
 277         select ARM_DMA_USE_IOMMU
 278         help
 279           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
 280           R-Mobile APE6 and R-Car H2/M2 SoCs.
 281
 282           If unsure, say N.
 283
 284 config SPAPR_TCE_IOMMU
 285         bool "sPAPR TCE IOMMU Support"
 286         depends on PPC_POWERNV || PPC_PSERIES
 287         select IOMMU_API
 288         help
 289           Enables bits of IOMMU API required by VFIO. The iommu_ops
 290           is not implemented as it is not necessary for VFIO.
 291
 292 config ARM_SMMU
 293         bool "ARM Ltd. System MMU (SMMU) Support"
 294         depends on ARM64 || (ARM_LPAE && OF)
 295         select IOMMU_API
 296         select ARM_DMA_USE_IOMMU if ARM
 297         help
 298           Support for implementations of the ARM System MMU architecture
 299           versions 1 and 2. The driver supports both v7l and v8l table
 300           formats with 4k and 64k page sizes.
 301
 302           Say Y here if your SoC includes an IOMMU device implementing
 303           the ARM SMMU architecture.
 304
 305 endif # IOMMU_SUPPORT