1# IOMMU_API always gets selected by whoever wants it. 2config IOMMU_API 3 bool 4 5menuconfig 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 15if IOMMU_SUPPORT 16 17menu "Generic IOMMU Pagetable Support" 18 19# Selected by the actual pagetable implementations 20config IOMMU_IO_PGTABLE 21 bool 22 23config 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 34config 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 43endmenu 44 45config IOMMU_IOVA 46 bool 47 48config OF_IOMMU 49 def_bool y 50 depends on OF && IOMMU_API 51 52config 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 64config 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 77config IOMMU_PGTABLES_L2 78 def_bool y 79 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 80 81# AMD IOMMU support 82config 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 102config 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 112config 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 122config DMAR_TABLE 123 bool 124 125config 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 138config 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 147config 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 158config 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 167config 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 177config 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 186config 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 195config 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 208config 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 218config 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 Tegra210). 227 228config 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 241config 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 250config SHMOBILE_IPMMU 251 bool 252 253config SHMOBILE_IPMMU_TLB 254 bool 255 256config 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 277choice 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 313endchoice 314 315config 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 325config 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 338config 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 347config 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 360config 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 372endif # IOMMU_SUPPORT 373