1# SPDX-License-Identifier: GPL-2.0-only 2# The IOVA library may also be used by non-IOMMU_API users 3config IOMMU_IOVA 4 tristate 5 6# IOMMU_API always gets selected by whoever wants it. 7config IOMMU_API 8 bool 9 10config IOMMUFD_DRIVER 11 bool 12 default n 13 14menuconfig IOMMU_SUPPORT 15 bool "IOMMU Hardware Support" 16 depends on MMU 17 default y 18 help 19 Say Y here if you want to compile device drivers for IO Memory 20 Management Units into the kernel. These devices usually allow to 21 remap DMA requests and/or remap interrupts from other devices on the 22 system. 23 24if IOMMU_SUPPORT 25 26menu "Generic IOMMU Pagetable Support" 27 28# Selected by the actual pagetable implementations 29config IOMMU_IO_PGTABLE 30 bool 31 32config IOMMU_IO_PGTABLE_LPAE 33 bool "ARMv7/v8 Long Descriptor Format" 34 select IOMMU_IO_PGTABLE 35 depends on ARM || ARM64 || COMPILE_TEST 36 depends on !GENERIC_ATOMIC64 # for cmpxchg64() 37 help 38 Enable support for the ARM long descriptor pagetable format. 39 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page 40 sizes at both stage-1 and stage-2, as well as address spaces 41 up to 48-bits in size. 42 43config IOMMU_IO_PGTABLE_LPAE_KUNIT_TEST 44 tristate "KUnit tests for LPAE" 45 depends on IOMMU_IO_PGTABLE_LPAE && KUNIT 46 default KUNIT_ALL_TESTS 47 help 48 Enable kunit tests for LPAE page table allocator. This performs 49 a series of page-table consistency checks. 50 51 If unsure, say N here. 52 53config IOMMU_IO_PGTABLE_ARMV7S 54 bool "ARMv7/v8 Short Descriptor Format" 55 select IOMMU_IO_PGTABLE 56 depends on ARM || ARM64 || COMPILE_TEST 57 help 58 Enable support for the ARM Short-descriptor pagetable format. 59 This supports 32-bit virtual and physical addresses mapped using 60 2-level tables with 4KB pages/1MB sections, and contiguous entries 61 for 64KB pages/16MB supersections if indicated by the IOMMU driver. 62 63config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST 64 bool "ARMv7s selftests" 65 depends on IOMMU_IO_PGTABLE_ARMV7S 66 help 67 Enable self-tests for ARMv7s page table allocator. This performs 68 a series of page-table consistency checks during boot. 69 70 If unsure, say N here. 71 72config IOMMU_IO_PGTABLE_DART 73 bool "Apple DART Formats" 74 select IOMMU_IO_PGTABLE 75 depends on ARM64 || COMPILE_TEST 76 depends on !GENERIC_ATOMIC64 # for cmpxchg64() 77 help 78 Enable support for the Apple DART pagetable formats. These include 79 the t8020 and t6000/t8110 DART formats used in Apple M1/M2 family 80 SoCs. 81 82 If unsure, say N here. 83 84endmenu 85 86config IOMMU_DEBUGFS 87 bool "Export IOMMU internals in DebugFS" 88 depends on DEBUG_FS 89 help 90 Allows exposure of IOMMU device internals. This option enables 91 the use of debugfs by IOMMU drivers as required. Devices can, 92 at initialization time, cause the IOMMU code to create a top-level 93 debug/iommu directory, and then populate a subdirectory with 94 entries as required. 95 96choice 97 prompt "IOMMU default domain type" 98 depends on IOMMU_API 99 default IOMMU_DEFAULT_DMA_LAZY if X86 || S390 100 default IOMMU_DEFAULT_DMA_STRICT 101 help 102 Choose the type of IOMMU domain used to manage DMA API usage by 103 device drivers. The options here typically represent different 104 levels of tradeoff between robustness/security and performance, 105 depending on the IOMMU driver. Not all IOMMUs support all options. 106 This choice can be overridden at boot via the command line, and for 107 some devices also at runtime via sysfs. 108 109 If unsure, keep the default. 110 111config IOMMU_DEFAULT_DMA_STRICT 112 bool "Translated - Strict" 113 help 114 Trusted devices use translation to restrict their access to only 115 DMA-mapped pages, with strict TLB invalidation on unmap. Equivalent 116 to passing "iommu.passthrough=0 iommu.strict=1" on the command line. 117 118 Untrusted devices always use this mode, with an additional layer of 119 bounce-buffering such that they cannot gain access to any unrelated 120 data within a mapped page. 121 122config IOMMU_DEFAULT_DMA_LAZY 123 bool "Translated - Lazy" 124 help 125 Trusted devices use translation to restrict their access to only 126 DMA-mapped pages, but with "lazy" batched TLB invalidation. This 127 mode allows higher performance with some IOMMUs due to reduced TLB 128 flushing, but at the cost of reduced isolation since devices may be 129 able to access memory for some time after it has been unmapped. 130 Equivalent to passing "iommu.passthrough=0 iommu.strict=0" on the 131 command line. 132 133 If this mode is not supported by the IOMMU driver, the effective 134 runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT. 135 136config IOMMU_DEFAULT_PASSTHROUGH 137 bool "Passthrough" 138 help 139 Trusted devices are identity-mapped, giving them unrestricted access 140 to memory with minimal performance overhead. Equivalent to passing 141 "iommu.passthrough=1" (historically "iommu=pt") on the command line. 142 143 If this mode is not supported by the IOMMU driver, the effective 144 runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT. 145 146endchoice 147 148config OF_IOMMU 149 def_bool y 150 depends on OF && IOMMU_API 151 152# IOMMU-agnostic DMA-mapping layer 153config IOMMU_DMA 154 def_bool ARM64 || X86 || S390 155 select DMA_OPS_HELPERS 156 select IOMMU_API 157 select IOMMU_IOVA 158 select NEED_SG_DMA_LENGTH 159 select NEED_SG_DMA_FLAGS if SWIOTLB 160 161# Shared Virtual Addressing 162config IOMMU_SVA 163 select IOMMU_MM_DATA 164 bool 165 166config IOMMU_IOPF 167 bool 168 169config FSL_PAMU 170 bool "Freescale IOMMU support" 171 depends on PCI 172 depends on PHYS_64BIT 173 depends on PPC_E500MC || (COMPILE_TEST && PPC) 174 select IOMMU_API 175 select GENERIC_ALLOCATOR 176 help 177 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 178 PAMU can authorize memory access, remap the memory address, and remap I/O 179 transaction types. 180 181# MSM IOMMU support 182config MSM_IOMMU 183 bool "MSM IOMMU Support" 184 depends on ARM 185 depends on ARCH_QCOM || COMPILE_TEST 186 select IOMMU_API 187 select IOMMU_IO_PGTABLE_ARMV7S 188 help 189 Support for the IOMMUs found on certain Qualcomm SOCs. 190 These IOMMUs allow virtualization of the address space used by most 191 cores within the multimedia subsystem. 192 193 If unsure, say N here. 194 195source "drivers/iommu/amd/Kconfig" 196source "drivers/iommu/arm/Kconfig" 197source "drivers/iommu/intel/Kconfig" 198source "drivers/iommu/iommufd/Kconfig" 199source "drivers/iommu/riscv/Kconfig" 200 201config IRQ_REMAP 202 bool "Support for Interrupt Remapping" 203 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 204 select IRQ_MSI_LIB 205 help 206 Supports Interrupt remapping for IO-APIC and MSI devices. 207 To use x2apic mode in the CPU's which support x2APIC enhancements or 208 to support platforms with CPU's having > 8 bit APIC ID, say Y. 209 210# OMAP IOMMU support 211config OMAP_IOMMU 212 bool "OMAP IOMMU Support" 213 depends on ARCH_OMAP2PLUS || COMPILE_TEST 214 select IOMMU_API 215 help 216 The OMAP3 media platform drivers depend on iommu support, 217 if you need them say Y here. 218 219config OMAP_IOMMU_DEBUG 220 bool "Export OMAP IOMMU internals in DebugFS" 221 depends on OMAP_IOMMU && DEBUG_FS 222 help 223 Select this to see extensive information about 224 the internal state of OMAP IOMMU in debugfs. 225 226 Say N unless you know you need this. 227 228config ROCKCHIP_IOMMU 229 bool "Rockchip IOMMU Support" 230 depends on ARCH_ROCKCHIP || COMPILE_TEST 231 select IOMMU_API 232 select ARM_DMA_USE_IOMMU 233 help 234 Support for IOMMUs found on Rockchip rk32xx SOCs. 235 These IOMMUs allow virtualization of the address space used by most 236 cores within the multimedia subsystem. 237 Say Y here if you are using a Rockchip SoC that includes an IOMMU 238 device. 239 240config SUN50I_IOMMU 241 bool "Allwinner H6 IOMMU Support" 242 depends on HAS_DMA 243 depends on ARCH_SUNXI || COMPILE_TEST 244 select ARM_DMA_USE_IOMMU 245 select IOMMU_API 246 help 247 Support for the IOMMU introduced in the Allwinner H6 SoCs. 248 249config TEGRA_IOMMU_SMMU 250 bool "NVIDIA Tegra SMMU Support" 251 depends on ARCH_TEGRA || COMPILE_TEST 252 depends on TEGRA_AHB 253 depends on TEGRA_MC 254 select IOMMU_API 255 help 256 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 257 SoCs (Tegra30 up to Tegra210). 258 259config EXYNOS_IOMMU 260 bool "Exynos IOMMU Support" 261 depends on ARCH_EXYNOS || COMPILE_TEST 262 depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes 263 select IOMMU_API 264 select ARM_DMA_USE_IOMMU 265 help 266 Support for the IOMMU (System MMU) of Samsung Exynos application 267 processor family. This enables H/W multimedia accelerators to see 268 non-linear physical memory chunks as linear memory in their 269 address space. 270 271 If unsure, say N here. 272 273config EXYNOS_IOMMU_DEBUG 274 bool "Debugging log for Exynos IOMMU" 275 depends on EXYNOS_IOMMU 276 help 277 Select this to see the detailed log message that shows what 278 happens in the IOMMU driver. 279 280 Say N unless you need kernel log message for IOMMU debugging. 281 282config IPMMU_VMSA 283 bool "Renesas VMSA-compatible IPMMU" 284 depends on ARCH_RENESAS || COMPILE_TEST 285 depends on ARM || ARM64 || COMPILE_TEST 286 depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE 287 select IOMMU_API 288 select IOMMU_IO_PGTABLE_LPAE 289 select ARM_DMA_USE_IOMMU 290 help 291 Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile 292 APE6, R-Car Gen{2,3} and RZ/G{1,2} SoCs. 293 294 If unsure, say N. 295 296config SPAPR_TCE_IOMMU 297 bool "sPAPR TCE IOMMU Support" 298 depends on PPC_POWERNV || PPC_PSERIES 299 select IOMMU_API 300 help 301 Enables bits of IOMMU API required by VFIO. The iommu_ops 302 is not implemented as it is not necessary for VFIO. 303 304config APPLE_DART 305 tristate "Apple DART IOMMU Support" 306 depends on ARCH_APPLE || COMPILE_TEST 307 depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_DART 308 select IOMMU_API 309 select IOMMU_IO_PGTABLE_DART 310 help 311 Support for Apple DART (Device Address Resolution Table) IOMMUs 312 found in Apple ARM SoCs like the M1. 313 This IOMMU is required for most peripherals using DMA to access 314 the main memory. 315 316 Say Y here if you are using an Apple SoC. 317 318config S390_IOMMU 319 def_bool y if S390 && PCI 320 depends on S390 && PCI 321 select IOMMU_API 322 help 323 Support for the IOMMU API for s390 PCI devices. 324 325config MTK_IOMMU 326 tristate "MediaTek IOMMU Support" 327 depends on ARCH_MEDIATEK || COMPILE_TEST 328 select ARM_DMA_USE_IOMMU 329 select IOMMU_API 330 select IOMMU_IO_PGTABLE_ARMV7S 331 select MEMORY 332 select MTK_SMI 333 help 334 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia 335 Memory Management Unit. This option enables remapping of DMA memory 336 accesses for the multimedia subsystem. 337 338 If unsure, say N here. 339 340config MTK_IOMMU_V1 341 tristate "MediaTek IOMMU Version 1 (M4U gen1) Support" 342 depends on (ARCH_MEDIATEK && ARM) || COMPILE_TEST 343 select ARM_DMA_USE_IOMMU 344 select IOMMU_API 345 select MEMORY 346 select MTK_SMI 347 help 348 Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is 349 Multimedia Memory Managememt Unit. This option enables remapping of 350 DMA memory accesses for the multimedia subsystem. 351 352 if unsure, say N here. 353 354config HYPERV_IOMMU 355 bool "Hyper-V IRQ Handling" 356 depends on HYPERV && X86 357 select IOMMU_API 358 default HYPERV 359 help 360 Stub IOMMU driver to handle IRQs to support Hyper-V Linux 361 guest and root partitions. 362 363config VIRTIO_IOMMU 364 tristate "Virtio IOMMU driver" 365 depends on VIRTIO 366 depends on (ARM64 || X86) 367 select IOMMU_API 368 select INTERVAL_TREE 369 select ACPI_VIOT if ACPI 370 help 371 Para-virtualised IOMMU driver with virtio. 372 373 Say Y here if you intend to run this kernel as a guest. 374 375config SPRD_IOMMU 376 tristate "Unisoc IOMMU Support" 377 depends on ARCH_SPRD || COMPILE_TEST 378 select IOMMU_API 379 help 380 Support for IOMMU on Unisoc's SoCs, this IOMMU can be used by 381 Unisoc's multimedia devices, such as display, Image codec(jpeg) 382 and a few signal processors, including VSP(video), GSP(graphic), 383 ISP(image), and CPP(camera pixel processor), etc. 384 385 Say Y here if you want to use the multimedia devices listed above. 386 387endif # IOMMU_SUPPORT 388 389source "drivers/iommu/generic_pt/Kconfig" 390