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 depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) 27 help 28 Enable support for the ARM long descriptor pagetable format. 29 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page 30 sizes at both stage-1 and stage-2, as well as address spaces 31 up to 48-bits in size. 32 33config IOMMU_IO_PGTABLE_LPAE_SELFTEST 34 bool "LPAE selftests" 35 depends on IOMMU_IO_PGTABLE_LPAE 36 help 37 Enable self-tests for LPAE page table allocator. This performs 38 a series of page-table consistency checks during boot. 39 40 If unsure, say N here. 41 42config IOMMU_IO_PGTABLE_ARMV7S 43 bool "ARMv7/v8 Short Descriptor Format" 44 select IOMMU_IO_PGTABLE 45 depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) 46 help 47 Enable support for the ARM Short-descriptor pagetable format. 48 This supports 32-bit virtual and physical addresses mapped using 49 2-level tables with 4KB pages/1MB sections, and contiguous entries 50 for 64KB pages/16MB supersections if indicated by the IOMMU driver. 51 52config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST 53 bool "ARMv7s selftests" 54 depends on IOMMU_IO_PGTABLE_ARMV7S 55 help 56 Enable self-tests for ARMv7s page table allocator. This performs 57 a series of page-table consistency checks during boot. 58 59 If unsure, say N here. 60 61endmenu 62 63config IOMMU_IOVA 64 tristate 65 66config OF_IOMMU 67 def_bool y 68 depends on OF && IOMMU_API 69 70# IOMMU-agnostic DMA-mapping layer 71config IOMMU_DMA 72 bool 73 select IOMMU_API 74 select IOMMU_IOVA 75 select NEED_SG_DMA_LENGTH 76 77config FSL_PAMU 78 bool "Freescale IOMMU support" 79 depends on PPC_E500MC || (COMPILE_TEST && PPC) 80 select IOMMU_API 81 select GENERIC_ALLOCATOR 82 help 83 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 84 PAMU can authorize memory access, remap the memory address, and remap I/O 85 transaction types. 86 87# MSM IOMMU support 88config MSM_IOMMU 89 bool "MSM IOMMU Support" 90 depends on ARM 91 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 92 depends on BROKEN 93 select IOMMU_API 94 help 95 Support for the IOMMUs found on certain Qualcomm SOCs. 96 These IOMMUs allow virtualization of the address space used by most 97 cores within the multimedia subsystem. 98 99 If unsure, say N here. 100 101config IOMMU_PGTABLES_L2 102 def_bool y 103 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 104 105# AMD IOMMU support 106config AMD_IOMMU 107 bool "AMD IOMMU support" 108 select SWIOTLB 109 select PCI_MSI 110 select PCI_ATS 111 select PCI_PRI 112 select PCI_PASID 113 select IOMMU_API 114 depends on X86_64 && PCI && ACPI 115 ---help--- 116 With this option you can enable support for AMD IOMMU hardware in 117 your system. An IOMMU is a hardware component which provides 118 remapping of DMA memory accesses from devices. With an AMD IOMMU you 119 can isolate the DMA memory of different devices and protect the 120 system from misbehaving device drivers or hardware. 121 122 You can find out if your system has an AMD IOMMU if you look into 123 your BIOS for an option to enable it or if you have an IVRS ACPI 124 table. 125 126config AMD_IOMMU_V2 127 tristate "AMD IOMMU Version 2 driver" 128 depends on AMD_IOMMU 129 select MMU_NOTIFIER 130 ---help--- 131 This option enables support for the AMD IOMMUv2 features of the IOMMU 132 hardware. Select this option if you want to use devices that support 133 the PCI PRI and PASID interface. 134 135# Intel IOMMU support 136config DMAR_TABLE 137 bool 138 139config INTEL_IOMMU 140 bool "Support for Intel IOMMU using DMA Remapping Devices" 141 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 142 select IOMMU_API 143 select IOMMU_IOVA 144 select DMAR_TABLE 145 help 146 DMA remapping (DMAR) devices support enables independent address 147 translations for Direct Memory Access (DMA) from devices. 148 These DMA remapping devices are reported via ACPI tables 149 and include PCI device scope covered by these DMA 150 remapping devices. 151 152config INTEL_IOMMU_SVM 153 bool "Support for Shared Virtual Memory with Intel IOMMU" 154 depends on INTEL_IOMMU && X86 155 select PCI_PASID 156 select MMU_NOTIFIER 157 help 158 Shared Virtual Memory (SVM) provides a facility for devices 159 to access DMA resources through process address space by 160 means of a Process Address Space ID (PASID). 161 162config INTEL_IOMMU_DEFAULT_ON 163 def_bool y 164 prompt "Enable Intel DMA Remapping Devices by default" 165 depends on INTEL_IOMMU 166 help 167 Selecting this option will enable a DMAR device at boot time if 168 one is found. If this option is not selected, DMAR support can 169 be enabled by passing intel_iommu=on to the kernel. 170 171config INTEL_IOMMU_BROKEN_GFX_WA 172 bool "Workaround broken graphics drivers (going away soon)" 173 depends on INTEL_IOMMU && BROKEN && X86 174 ---help--- 175 Current Graphics drivers tend to use physical address 176 for DMA and avoid using DMA APIs. Setting this config 177 option permits the IOMMU driver to set a unity map for 178 all the OS-visible memory. Hence the driver can continue 179 to use physical addresses for DMA, at least until this 180 option is removed in the 2.6.32 kernel. 181 182config INTEL_IOMMU_FLOPPY_WA 183 def_bool y 184 depends on INTEL_IOMMU && X86 185 ---help--- 186 Floppy disk drivers are known to bypass DMA API calls 187 thereby failing to work when IOMMU is enabled. This 188 workaround will setup a 1:1 mapping for the first 189 16MiB to make floppy (an ISA device) work. 190 191config IRQ_REMAP 192 bool "Support for Interrupt Remapping" 193 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 194 select DMAR_TABLE 195 ---help--- 196 Supports Interrupt remapping for IO-APIC and MSI devices. 197 To use x2apic mode in the CPU's which support x2APIC enhancements or 198 to support platforms with CPU's having > 8 bit APIC ID, say Y. 199 200# OMAP IOMMU support 201config OMAP_IOMMU 202 bool "OMAP IOMMU Support" 203 depends on ARM && MMU 204 depends on ARCH_OMAP2PLUS || COMPILE_TEST 205 select IOMMU_API 206 ---help--- 207 The OMAP3 media platform drivers depend on iommu support, 208 if you need them say Y here. 209 210config OMAP_IOMMU_DEBUG 211 bool "Export OMAP IOMMU internals in DebugFS" 212 depends on OMAP_IOMMU && DEBUG_FS 213 ---help--- 214 Select this to see extensive information about 215 the internal state of OMAP IOMMU in debugfs. 216 217 Say N unless you know you need this. 218 219config ROCKCHIP_IOMMU 220 bool "Rockchip IOMMU Support" 221 depends on ARM 222 depends on ARCH_ROCKCHIP || COMPILE_TEST 223 select IOMMU_API 224 select ARM_DMA_USE_IOMMU 225 help 226 Support for IOMMUs found on Rockchip rk32xx SOCs. 227 These IOMMUs allow virtualization of the address space used by most 228 cores within the multimedia subsystem. 229 Say Y here if you are using a Rockchip SoC that includes an IOMMU 230 device. 231 232config TEGRA_IOMMU_GART 233 bool "Tegra GART IOMMU Support" 234 depends on ARCH_TEGRA_2x_SOC 235 select IOMMU_API 236 help 237 Enables support for remapping discontiguous physical memory 238 shared with the operating system into contiguous I/O virtual 239 space through the GART (Graphics Address Relocation Table) 240 hardware included on Tegra SoCs. 241 242config TEGRA_IOMMU_SMMU 243 bool "NVIDIA Tegra SMMU Support" 244 depends on ARCH_TEGRA 245 depends on TEGRA_AHB 246 depends on TEGRA_MC 247 select IOMMU_API 248 help 249 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 250 SoCs (Tegra30 up to Tegra210). 251 252config EXYNOS_IOMMU 253 bool "Exynos IOMMU Support" 254 depends on ARCH_EXYNOS && MMU 255 select IOMMU_API 256 select ARM_DMA_USE_IOMMU 257 help 258 Support for the IOMMU (System MMU) of Samsung Exynos application 259 processor family. This enables H/W multimedia accelerators to see 260 non-linear physical memory chunks as linear memory in their 261 address space. 262 263 If unsure, say N here. 264 265config EXYNOS_IOMMU_DEBUG 266 bool "Debugging log for Exynos IOMMU" 267 depends on EXYNOS_IOMMU 268 help 269 Select this to see the detailed log message that shows what 270 happens in the IOMMU driver. 271 272 Say N unless you need kernel log message for IOMMU debugging. 273 274config IPMMU_VMSA 275 bool "Renesas VMSA-compatible IPMMU" 276 depends on ARM_LPAE 277 depends on ARCH_RENESAS || COMPILE_TEST 278 select IOMMU_API 279 select IOMMU_IO_PGTABLE_LPAE 280 select ARM_DMA_USE_IOMMU 281 help 282 Support for the Renesas VMSA-compatible IPMMU Renesas found in the 283 R-Mobile APE6 and R-Car H2/M2 SoCs. 284 285 If unsure, say N. 286 287config SPAPR_TCE_IOMMU 288 bool "sPAPR TCE IOMMU Support" 289 depends on PPC_POWERNV || PPC_PSERIES 290 select IOMMU_API 291 help 292 Enables bits of IOMMU API required by VFIO. The iommu_ops 293 is not implemented as it is not necessary for VFIO. 294 295# ARM IOMMU support 296config ARM_SMMU 297 bool "ARM Ltd. System MMU (SMMU) Support" 298 depends on (ARM64 || ARM) && MMU 299 select IOMMU_API 300 select IOMMU_IO_PGTABLE_LPAE 301 select ARM_DMA_USE_IOMMU if ARM 302 help 303 Support for implementations of the ARM System MMU architecture 304 versions 1 and 2. 305 306 Say Y here if your SoC includes an IOMMU device implementing 307 the ARM SMMU architecture. 308 309config ARM_SMMU_V3 310 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" 311 depends on ARM64 && PCI 312 select IOMMU_API 313 select IOMMU_IO_PGTABLE_LPAE 314 select GENERIC_MSI_IRQ_DOMAIN 315 help 316 Support for implementations of the ARM System MMU architecture 317 version 3 providing translation support to a PCIe root complex. 318 319 Say Y here if your system includes an IOMMU device implementing 320 the ARM SMMUv3 architecture. 321 322config S390_IOMMU 323 def_bool y if S390 && PCI 324 depends on S390 && PCI 325 select IOMMU_API 326 help 327 Support for the IOMMU API for s390 PCI devices. 328 329config MTK_IOMMU 330 bool "MTK IOMMU Support" 331 depends on ARM || ARM64 332 depends on ARCH_MEDIATEK || COMPILE_TEST 333 select ARM_DMA_USE_IOMMU 334 select IOMMU_API 335 select IOMMU_DMA 336 select IOMMU_IO_PGTABLE_ARMV7S 337 select MEMORY 338 select MTK_SMI 339 help 340 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia 341 Memory Management Unit. This option enables remapping of DMA memory 342 accesses for the multimedia subsystem. 343 344 If unsure, say N here. 345 346endif # IOMMU_SUPPORT 347