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# The IOASID library may also be used by non-IOMMU_API users 7config IOASID 8 tristate 9 10# IOMMU_API always gets selected by whoever wants it. 11config IOMMU_API 12 bool 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 && !GENERIC_ATOMIC64) 36 help 37 Enable support for the ARM long descriptor pagetable format. 38 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page 39 sizes at both stage-1 and stage-2, as well as address spaces 40 up to 48-bits in size. 41 42config IOMMU_IO_PGTABLE_LPAE_SELFTEST 43 bool "LPAE selftests" 44 depends on IOMMU_IO_PGTABLE_LPAE 45 help 46 Enable self-tests for LPAE page table allocator. This performs 47 a series of page-table consistency checks during boot. 48 49 If unsure, say N here. 50 51config IOMMU_IO_PGTABLE_ARMV7S 52 bool "ARMv7/v8 Short Descriptor Format" 53 select IOMMU_IO_PGTABLE 54 depends on ARM || ARM64 || COMPILE_TEST 55 help 56 Enable support for the ARM Short-descriptor pagetable format. 57 This supports 32-bit virtual and physical addresses mapped using 58 2-level tables with 4KB pages/1MB sections, and contiguous entries 59 for 64KB pages/16MB supersections if indicated by the IOMMU driver. 60 61config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST 62 bool "ARMv7s selftests" 63 depends on IOMMU_IO_PGTABLE_ARMV7S 64 help 65 Enable self-tests for ARMv7s page table allocator. This performs 66 a series of page-table consistency checks during boot. 67 68 If unsure, say N here. 69 70endmenu 71 72config IOMMU_DEBUGFS 73 bool "Export IOMMU internals in DebugFS" 74 depends on DEBUG_FS 75 help 76 Allows exposure of IOMMU device internals. This option enables 77 the use of debugfs by IOMMU drivers as required. Devices can, 78 at initialization time, cause the IOMMU code to create a top-level 79 debug/iommu directory, and then populate a subdirectory with 80 entries as required. 81 82config IOMMU_DEFAULT_PASSTHROUGH 83 bool "IOMMU passthrough by default" 84 depends on IOMMU_API 85 help 86 Enable passthrough by default, removing the need to pass in 87 iommu.passthrough=on or iommu=pt through command line. If this 88 is enabled, you can still disable with iommu.passthrough=off 89 or iommu=nopt depending on the architecture. 90 91 If unsure, say N here. 92 93config OF_IOMMU 94 def_bool y 95 depends on OF && IOMMU_API 96 97# IOMMU-agnostic DMA-mapping layer 98config IOMMU_DMA 99 bool 100 select DMA_OPS 101 select IOMMU_API 102 select IOMMU_IOVA 103 select IRQ_MSI_IOMMU 104 select NEED_SG_DMA_LENGTH 105 106# Shared Virtual Addressing library 107config IOMMU_SVA_LIB 108 bool 109 select IOASID 110 111config FSL_PAMU 112 bool "Freescale IOMMU support" 113 depends on PCI 114 depends on PHYS_64BIT 115 depends on PPC_E500MC || (COMPILE_TEST && PPC) 116 select IOMMU_API 117 select GENERIC_ALLOCATOR 118 help 119 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 120 PAMU can authorize memory access, remap the memory address, and remap I/O 121 transaction types. 122 123# MSM IOMMU support 124config MSM_IOMMU 125 bool "MSM IOMMU Support" 126 depends on ARM 127 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 128 select IOMMU_API 129 select IOMMU_IO_PGTABLE_ARMV7S 130 help 131 Support for the IOMMUs found on certain Qualcomm SOCs. 132 These IOMMUs allow virtualization of the address space used by most 133 cores within the multimedia subsystem. 134 135 If unsure, say N here. 136 137source "drivers/iommu/amd/Kconfig" 138source "drivers/iommu/intel/Kconfig" 139 140config IRQ_REMAP 141 bool "Support for Interrupt Remapping" 142 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 143 select DMAR_TABLE 144 help 145 Supports Interrupt remapping for IO-APIC and MSI devices. 146 To use x2apic mode in the CPU's which support x2APIC enhancements or 147 to support platforms with CPU's having > 8 bit APIC ID, say Y. 148 149# OMAP IOMMU support 150config OMAP_IOMMU 151 bool "OMAP IOMMU Support" 152 depends on ARCH_OMAP2PLUS || COMPILE_TEST 153 select IOMMU_API 154 help 155 The OMAP3 media platform drivers depend on iommu support, 156 if you need them say Y here. 157 158config OMAP_IOMMU_DEBUG 159 bool "Export OMAP IOMMU internals in DebugFS" 160 depends on OMAP_IOMMU && DEBUG_FS 161 help 162 Select this to see extensive information about 163 the internal state of OMAP IOMMU in debugfs. 164 165 Say N unless you know you need this. 166 167config ROCKCHIP_IOMMU 168 bool "Rockchip IOMMU Support" 169 depends on ARCH_ROCKCHIP || COMPILE_TEST 170 select IOMMU_API 171 select ARM_DMA_USE_IOMMU 172 help 173 Support for IOMMUs found on Rockchip rk32xx SOCs. 174 These IOMMUs allow virtualization of the address space used by most 175 cores within the multimedia subsystem. 176 Say Y here if you are using a Rockchip SoC that includes an IOMMU 177 device. 178 179config SUN50I_IOMMU 180 bool "Allwinner H6 IOMMU Support" 181 depends on HAS_DMA 182 depends on ARCH_SUNXI || COMPILE_TEST 183 select ARM_DMA_USE_IOMMU 184 select IOMMU_API 185 help 186 Support for the IOMMU introduced in the Allwinner H6 SoCs. 187 188config TEGRA_IOMMU_GART 189 bool "Tegra GART IOMMU Support" 190 depends on ARCH_TEGRA_2x_SOC 191 depends on TEGRA_MC 192 select IOMMU_API 193 help 194 Enables support for remapping discontiguous physical memory 195 shared with the operating system into contiguous I/O virtual 196 space through the GART (Graphics Address Relocation Table) 197 hardware included on Tegra SoCs. 198 199config TEGRA_IOMMU_SMMU 200 bool "NVIDIA Tegra SMMU Support" 201 depends on ARCH_TEGRA 202 depends on TEGRA_AHB 203 depends on TEGRA_MC 204 select IOMMU_API 205 help 206 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 207 SoCs (Tegra30 up to Tegra210). 208 209config EXYNOS_IOMMU 210 bool "Exynos IOMMU Support" 211 depends on ARCH_EXYNOS || COMPILE_TEST 212 depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes 213 select IOMMU_API 214 select ARM_DMA_USE_IOMMU 215 help 216 Support for the IOMMU (System MMU) of Samsung Exynos application 217 processor family. This enables H/W multimedia accelerators to see 218 non-linear physical memory chunks as linear memory in their 219 address space. 220 221 If unsure, say N here. 222 223config EXYNOS_IOMMU_DEBUG 224 bool "Debugging log for Exynos IOMMU" 225 depends on EXYNOS_IOMMU 226 help 227 Select this to see the detailed log message that shows what 228 happens in the IOMMU driver. 229 230 Say N unless you need kernel log message for IOMMU debugging. 231 232config IPMMU_VMSA 233 bool "Renesas VMSA-compatible IPMMU" 234 depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64) 235 select IOMMU_API 236 select IOMMU_IO_PGTABLE_LPAE 237 select ARM_DMA_USE_IOMMU 238 help 239 Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile 240 APE6, R-Car Gen{2,3} and RZ/G{1,2} SoCs. 241 242 If unsure, say N. 243 244config SPAPR_TCE_IOMMU 245 bool "sPAPR TCE IOMMU Support" 246 depends on PPC_POWERNV || PPC_PSERIES 247 select IOMMU_API 248 help 249 Enables bits of IOMMU API required by VFIO. The iommu_ops 250 is not implemented as it is not necessary for VFIO. 251 252# ARM IOMMU support 253config ARM_SMMU 254 tristate "ARM Ltd. System MMU (SMMU) Support" 255 depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64) 256 select IOMMU_API 257 select IOMMU_IO_PGTABLE_LPAE 258 select ARM_DMA_USE_IOMMU if ARM 259 help 260 Support for implementations of the ARM System MMU architecture 261 versions 1 and 2. 262 263 Say Y here if your SoC includes an IOMMU device implementing 264 the ARM SMMU architecture. 265 266config ARM_SMMU_LEGACY_DT_BINDINGS 267 bool "Support the legacy \"mmu-masters\" devicetree bindings" 268 depends on ARM_SMMU=y && OF 269 help 270 Support for the badly designed and deprecated "mmu-masters" 271 devicetree bindings. This allows some DMA masters to attach 272 to the SMMU but does not provide any support via the DMA API. 273 If you're lucky, you might be able to get VFIO up and running. 274 275 If you say Y here then you'll make me very sad. Instead, say N 276 and move your firmware to the utopian future that was 2016. 277 278config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT 279 bool "Default to disabling bypass on ARM SMMU v1 and v2" 280 depends on ARM_SMMU 281 default y 282 help 283 Say Y here to (by default) disable bypass streams such that 284 incoming transactions from devices that are not attached to 285 an iommu domain will report an abort back to the device and 286 will not be allowed to pass through the SMMU. 287 288 Any old kernels that existed before this KConfig was 289 introduced would default to _allowing_ bypass (AKA the 290 equivalent of NO for this config). However the default for 291 this option is YES because the old behavior is insecure. 292 293 There are few reasons to allow unmatched stream bypass, and 294 even fewer good ones. If saying YES here breaks your board 295 you should work on fixing your board. This KConfig option 296 is expected to be removed in the future and we'll simply 297 hardcode the bypass disable in the code. 298 299 NOTE: the kernel command line parameter 300 'arm-smmu.disable_bypass' will continue to override this 301 config. 302 303config ARM_SMMU_V3 304 tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support" 305 depends on ARM64 306 select IOMMU_API 307 select IOMMU_IO_PGTABLE_LPAE 308 select GENERIC_MSI_IRQ_DOMAIN 309 help 310 Support for implementations of the ARM System MMU architecture 311 version 3 providing translation support to a PCIe root complex. 312 313 Say Y here if your system includes an IOMMU device implementing 314 the ARM SMMUv3 architecture. 315 316config ARM_SMMU_V3_SVA 317 bool "Shared Virtual Addressing support for the ARM SMMUv3" 318 depends on ARM_SMMU_V3 319 select IOMMU_SVA_LIB 320 select MMU_NOTIFIER 321 help 322 Support for sharing process address spaces with devices using the 323 SMMUv3. 324 325 Say Y here if your system supports SVA extensions such as PCIe PASID 326 and PRI. 327 328config S390_IOMMU 329 def_bool y if S390 && PCI 330 depends on S390 && PCI 331 select IOMMU_API 332 help 333 Support for the IOMMU API for s390 PCI devices. 334 335config S390_CCW_IOMMU 336 bool "S390 CCW IOMMU Support" 337 depends on S390 && CCW || COMPILE_TEST 338 select IOMMU_API 339 help 340 Enables bits of IOMMU API required by VFIO. The iommu_ops 341 is not implemented as it is not necessary for VFIO. 342 343config S390_AP_IOMMU 344 bool "S390 AP IOMMU Support" 345 depends on S390 && ZCRYPT || COMPILE_TEST 346 select IOMMU_API 347 help 348 Enables bits of IOMMU API required by VFIO. The iommu_ops 349 is not implemented as it is not necessary for VFIO. 350 351config MTK_IOMMU 352 bool "MTK IOMMU Support" 353 depends on ARCH_MEDIATEK || COMPILE_TEST 354 select ARM_DMA_USE_IOMMU 355 select IOMMU_API 356 select IOMMU_IO_PGTABLE_ARMV7S 357 select MEMORY 358 select MTK_SMI 359 help 360 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia 361 Memory Management Unit. This option enables remapping of DMA memory 362 accesses for the multimedia subsystem. 363 364 If unsure, say N here. 365 366config MTK_IOMMU_V1 367 bool "MTK IOMMU Version 1 (M4U gen1) Support" 368 depends on ARM 369 depends on ARCH_MEDIATEK || COMPILE_TEST 370 select ARM_DMA_USE_IOMMU 371 select IOMMU_API 372 select MEMORY 373 select MTK_SMI 374 help 375 Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is 376 Multimedia Memory Managememt Unit. This option enables remapping of 377 DMA memory accesses for the multimedia subsystem. 378 379 if unsure, say N here. 380 381config QCOM_IOMMU 382 # Note: iommu drivers cannot (yet?) be built as modules 383 bool "Qualcomm IOMMU Support" 384 depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64) 385 select IOMMU_API 386 select IOMMU_IO_PGTABLE_LPAE 387 select ARM_DMA_USE_IOMMU 388 help 389 Support for IOMMU on certain Qualcomm SoCs. 390 391config HYPERV_IOMMU 392 bool "Hyper-V x2APIC IRQ Handling" 393 depends on HYPERV && X86 394 select IOMMU_API 395 default HYPERV 396 help 397 Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux 398 guests to run with x2APIC mode enabled. 399 400config VIRTIO_IOMMU 401 tristate "Virtio IOMMU driver" 402 depends on VIRTIO 403 depends on ARM64 404 select IOMMU_API 405 select INTERVAL_TREE 406 help 407 Para-virtualised IOMMU driver with virtio. 408 409 Say Y here if you intend to run this kernel as a guest. 410 411endif # IOMMU_SUPPORT 412