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 PPC32 80 depends on PPC_E500MC || COMPILE_TEST 81 select IOMMU_API 82 select GENERIC_ALLOCATOR 83 help 84 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 85 PAMU can authorize memory access, remap the memory address, and remap I/O 86 transaction types. 87 88# MSM IOMMU support 89config MSM_IOMMU 90 bool "MSM IOMMU Support" 91 depends on ARM 92 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 93 depends on BROKEN 94 select IOMMU_API 95 help 96 Support for the IOMMUs found on certain Qualcomm SOCs. 97 These IOMMUs allow virtualization of the address space used by most 98 cores within the multimedia subsystem. 99 100 If unsure, say N here. 101 102config IOMMU_PGTABLES_L2 103 def_bool y 104 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 105 106# AMD IOMMU support 107config AMD_IOMMU 108 bool "AMD IOMMU support" 109 select SWIOTLB 110 select PCI_MSI 111 select PCI_ATS 112 select PCI_PRI 113 select PCI_PASID 114 select IOMMU_API 115 depends on X86_64 && PCI && ACPI 116 ---help--- 117 With this option you can enable support for AMD IOMMU hardware in 118 your system. An IOMMU is a hardware component which provides 119 remapping of DMA memory accesses from devices. With an AMD IOMMU you 120 can isolate the DMA memory of different devices and protect the 121 system from misbehaving device drivers or hardware. 122 123 You can find out if your system has an AMD IOMMU if you look into 124 your BIOS for an option to enable it or if you have an IVRS ACPI 125 table. 126 127config AMD_IOMMU_STATS 128 bool "Export AMD IOMMU statistics to debugfs" 129 depends on AMD_IOMMU 130 select DEBUG_FS 131 ---help--- 132 This option enables code in the AMD IOMMU driver to collect various 133 statistics about whats happening in the driver and exports that 134 information to userspace via debugfs. 135 If unsure, say N. 136 137config AMD_IOMMU_V2 138 tristate "AMD IOMMU Version 2 driver" 139 depends on AMD_IOMMU 140 select MMU_NOTIFIER 141 ---help--- 142 This option enables support for the AMD IOMMUv2 features of the IOMMU 143 hardware. Select this option if you want to use devices that support 144 the PCI PRI and PASID interface. 145 146# Intel IOMMU support 147config DMAR_TABLE 148 bool 149 150config INTEL_IOMMU 151 bool "Support for Intel IOMMU using DMA Remapping Devices" 152 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 153 select IOMMU_API 154 select IOMMU_IOVA 155 select DMAR_TABLE 156 help 157 DMA remapping (DMAR) devices support enables independent address 158 translations for Direct Memory Access (DMA) from devices. 159 These DMA remapping devices are reported via ACPI tables 160 and include PCI device scope covered by these DMA 161 remapping devices. 162 163config INTEL_IOMMU_SVM 164 bool "Support for Shared Virtual Memory with Intel IOMMU" 165 depends on INTEL_IOMMU && X86 166 select PCI_PASID 167 select MMU_NOTIFIER 168 help 169 Shared Virtual Memory (SVM) provides a facility for devices 170 to access DMA resources through process address space by 171 means of a Process Address Space ID (PASID). 172 173config INTEL_IOMMU_DEFAULT_ON 174 def_bool y 175 prompt "Enable Intel DMA Remapping Devices by default" 176 depends on INTEL_IOMMU 177 help 178 Selecting this option will enable a DMAR device at boot time if 179 one is found. If this option is not selected, DMAR support can 180 be enabled by passing intel_iommu=on to the kernel. 181 182config INTEL_IOMMU_BROKEN_GFX_WA 183 bool "Workaround broken graphics drivers (going away soon)" 184 depends on INTEL_IOMMU && BROKEN && X86 185 ---help--- 186 Current Graphics drivers tend to use physical address 187 for DMA and avoid using DMA APIs. Setting this config 188 option permits the IOMMU driver to set a unity map for 189 all the OS-visible memory. Hence the driver can continue 190 to use physical addresses for DMA, at least until this 191 option is removed in the 2.6.32 kernel. 192 193config INTEL_IOMMU_FLOPPY_WA 194 def_bool y 195 depends on INTEL_IOMMU && X86 196 ---help--- 197 Floppy disk drivers are known to bypass DMA API calls 198 thereby failing to work when IOMMU is enabled. This 199 workaround will setup a 1:1 mapping for the first 200 16MiB to make floppy (an ISA device) work. 201 202config IRQ_REMAP 203 bool "Support for Interrupt Remapping" 204 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 205 select DMAR_TABLE 206 ---help--- 207 Supports Interrupt remapping for IO-APIC and MSI devices. 208 To use x2apic mode in the CPU's which support x2APIC enhancements or 209 to support platforms with CPU's having > 8 bit APIC ID, say Y. 210 211# OMAP IOMMU support 212config OMAP_IOMMU 213 bool "OMAP IOMMU Support" 214 depends on ARM && MMU 215 depends on ARCH_OMAP2PLUS || COMPILE_TEST 216 select IOMMU_API 217 ---help--- 218 The OMAP3 media platform drivers depend on iommu support, 219 if you need them say Y here. 220 221config OMAP_IOMMU_DEBUG 222 bool "Export OMAP IOMMU internals in DebugFS" 223 depends on OMAP_IOMMU && DEBUG_FS 224 ---help--- 225 Select this to see extensive information about 226 the internal state of OMAP IOMMU in debugfs. 227 228 Say N unless you know you need this. 229 230config ROCKCHIP_IOMMU 231 bool "Rockchip IOMMU Support" 232 depends on ARM 233 depends on ARCH_ROCKCHIP || COMPILE_TEST 234 select IOMMU_API 235 select ARM_DMA_USE_IOMMU 236 help 237 Support for IOMMUs found on Rockchip rk32xx SOCs. 238 These IOMMUs allow virtualization of the address space used by most 239 cores within the multimedia subsystem. 240 Say Y here if you are using a Rockchip SoC that includes an IOMMU 241 device. 242 243config TEGRA_IOMMU_GART 244 bool "Tegra GART IOMMU Support" 245 depends on ARCH_TEGRA_2x_SOC 246 select IOMMU_API 247 help 248 Enables support for remapping discontiguous physical memory 249 shared with the operating system into contiguous I/O virtual 250 space through the GART (Graphics Address Relocation Table) 251 hardware included on Tegra SoCs. 252 253config TEGRA_IOMMU_SMMU 254 bool "NVIDIA Tegra SMMU Support" 255 depends on ARCH_TEGRA 256 depends on TEGRA_AHB 257 depends on TEGRA_MC 258 select IOMMU_API 259 help 260 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 261 SoCs (Tegra30 up to Tegra210). 262 263config EXYNOS_IOMMU 264 bool "Exynos IOMMU Support" 265 depends on ARCH_EXYNOS && MMU 266 select IOMMU_API 267 select ARM_DMA_USE_IOMMU 268 help 269 Support for the IOMMU (System MMU) of Samsung Exynos application 270 processor family. This enables H/W multimedia accelerators to see 271 non-linear physical memory chunks as linear memory in their 272 address space. 273 274 If unsure, say N here. 275 276config EXYNOS_IOMMU_DEBUG 277 bool "Debugging log for Exynos IOMMU" 278 depends on EXYNOS_IOMMU 279 help 280 Select this to see the detailed log message that shows what 281 happens in the IOMMU driver. 282 283 Say N unless you need kernel log message for IOMMU debugging. 284 285config IPMMU_VMSA 286 bool "Renesas VMSA-compatible IPMMU" 287 depends on ARM_LPAE 288 depends on ARCH_RENESAS || COMPILE_TEST 289 select IOMMU_API 290 select IOMMU_IO_PGTABLE_LPAE 291 select ARM_DMA_USE_IOMMU 292 help 293 Support for the Renesas VMSA-compatible IPMMU Renesas found in the 294 R-Mobile APE6 and R-Car H2/M2 SoCs. 295 296 If unsure, say N. 297 298config SPAPR_TCE_IOMMU 299 bool "sPAPR TCE IOMMU Support" 300 depends on PPC_POWERNV || PPC_PSERIES 301 select IOMMU_API 302 help 303 Enables bits of IOMMU API required by VFIO. The iommu_ops 304 is not implemented as it is not necessary for VFIO. 305 306# ARM IOMMU support 307config ARM_SMMU 308 bool "ARM Ltd. System MMU (SMMU) Support" 309 depends on (ARM64 || ARM) && MMU 310 select IOMMU_API 311 select IOMMU_IO_PGTABLE_LPAE 312 select ARM_DMA_USE_IOMMU if ARM 313 help 314 Support for implementations of the ARM System MMU architecture 315 versions 1 and 2. 316 317 Say Y here if your SoC includes an IOMMU device implementing 318 the ARM SMMU architecture. 319 320config ARM_SMMU_V3 321 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" 322 depends on ARM64 && PCI 323 select IOMMU_API 324 select IOMMU_IO_PGTABLE_LPAE 325 select GENERIC_MSI_IRQ_DOMAIN 326 help 327 Support for implementations of the ARM System MMU architecture 328 version 3 providing translation support to a PCIe root complex. 329 330 Say Y here if your system includes an IOMMU device implementing 331 the ARM SMMUv3 architecture. 332 333config S390_IOMMU 334 def_bool y if S390 && PCI 335 depends on S390 && PCI 336 select IOMMU_API 337 help 338 Support for the IOMMU API for s390 PCI devices. 339 340config MTK_IOMMU 341 bool "MTK IOMMU Support" 342 depends on ARM || ARM64 343 depends on ARCH_MEDIATEK || COMPILE_TEST 344 select ARM_DMA_USE_IOMMU 345 select IOMMU_API 346 select IOMMU_DMA 347 select IOMMU_IO_PGTABLE_ARMV7S 348 select MEMORY 349 select MTK_SMI 350 help 351 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia 352 Memory Management Unit. This option enables remapping of DMA memory 353 accesses for the multimedia subsystem. 354 355 If unsure, say N here. 356 357endif # IOMMU_SUPPORT 358