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