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 help 27 Enable support for the ARM long descriptor pagetable format. 28 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page 29 sizes at both stage-1 and stage-2, as well as address spaces 30 up to 48-bits in size. 31 32config IOMMU_IO_PGTABLE_LPAE_SELFTEST 33 bool "LPAE selftests" 34 depends on IOMMU_IO_PGTABLE_LPAE 35 help 36 Enable self-tests for LPAE page table allocator. This performs 37 a series of page-table consistency checks during boot. 38 39 If unsure, say N here. 40 41endmenu 42 43config IOMMU_IOVA 44 bool 45 46config OF_IOMMU 47 def_bool y 48 depends on OF && IOMMU_API 49 50config FSL_PAMU 51 bool "Freescale IOMMU support" 52 depends on PPC32 53 depends on PPC_E500MC || COMPILE_TEST 54 select IOMMU_API 55 select GENERIC_ALLOCATOR 56 help 57 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 58 PAMU can authorize memory access, remap the memory address, and remap I/O 59 transaction types. 60 61# MSM IOMMU support 62config MSM_IOMMU 63 bool "MSM IOMMU Support" 64 depends on ARM 65 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 66 select IOMMU_API 67 help 68 Support for the IOMMUs found on certain Qualcomm SOCs. 69 These IOMMUs allow virtualization of the address space used by most 70 cores within the multimedia subsystem. 71 72 If unsure, say N here. 73 74config IOMMU_PGTABLES_L2 75 def_bool y 76 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 77 78# AMD IOMMU support 79config AMD_IOMMU 80 bool "AMD IOMMU support" 81 select SWIOTLB 82 select PCI_MSI 83 select PCI_ATS 84 select PCI_PRI 85 select PCI_PASID 86 select IOMMU_API 87 depends on X86_64 && PCI && ACPI 88 ---help--- 89 With this option you can enable support for AMD IOMMU hardware in 90 your system. An IOMMU is a hardware component which provides 91 remapping of DMA memory accesses from devices. With an AMD IOMMU you 92 can isolate the DMA memory of different devices and protect the 93 system from misbehaving device drivers or hardware. 94 95 You can find out if your system has an AMD IOMMU if you look into 96 your BIOS for an option to enable it or if you have an IVRS ACPI 97 table. 98 99config AMD_IOMMU_STATS 100 bool "Export AMD IOMMU statistics to debugfs" 101 depends on AMD_IOMMU 102 select DEBUG_FS 103 ---help--- 104 This option enables code in the AMD IOMMU driver to collect various 105 statistics about whats happening in the driver and exports that 106 information to userspace via debugfs. 107 If unsure, say N. 108 109config AMD_IOMMU_V2 110 tristate "AMD IOMMU Version 2 driver" 111 depends on AMD_IOMMU 112 select MMU_NOTIFIER 113 ---help--- 114 This option enables support for the AMD IOMMUv2 features of the IOMMU 115 hardware. Select this option if you want to use devices that support 116 the PCI PRI and PASID interface. 117 118# Intel IOMMU support 119config DMAR_TABLE 120 bool 121 122config INTEL_IOMMU 123 bool "Support for Intel IOMMU using DMA Remapping Devices" 124 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 125 select IOMMU_API 126 select IOMMU_IOVA 127 select DMAR_TABLE 128 help 129 DMA remapping (DMAR) devices support enables independent address 130 translations for Direct Memory Access (DMA) from devices. 131 These DMA remapping devices are reported via ACPI tables 132 and include PCI device scope covered by these DMA 133 remapping devices. 134 135config INTEL_IOMMU_DEFAULT_ON 136 def_bool y 137 prompt "Enable Intel DMA Remapping Devices by default" 138 depends on INTEL_IOMMU 139 help 140 Selecting this option will enable a DMAR device at boot time if 141 one is found. If this option is not selected, DMAR support can 142 be enabled by passing intel_iommu=on to the kernel. 143 144config INTEL_IOMMU_BROKEN_GFX_WA 145 bool "Workaround broken graphics drivers (going away soon)" 146 depends on INTEL_IOMMU && BROKEN && X86 147 ---help--- 148 Current Graphics drivers tend to use physical address 149 for DMA and avoid using DMA APIs. Setting this config 150 option permits the IOMMU driver to set a unity map for 151 all the OS-visible memory. Hence the driver can continue 152 to use physical addresses for DMA, at least until this 153 option is removed in the 2.6.32 kernel. 154 155config INTEL_IOMMU_FLOPPY_WA 156 def_bool y 157 depends on INTEL_IOMMU && X86 158 ---help--- 159 Floppy disk drivers are known to bypass DMA API calls 160 thereby failing to work when IOMMU is enabled. This 161 workaround will setup a 1:1 mapping for the first 162 16MiB to make floppy (an ISA device) work. 163 164config IRQ_REMAP 165 bool "Support for Interrupt Remapping" 166 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 167 select DMAR_TABLE 168 ---help--- 169 Supports Interrupt remapping for IO-APIC and MSI devices. 170 To use x2apic mode in the CPU's which support x2APIC enhancements or 171 to support platforms with CPU's having > 8 bit APIC ID, say Y. 172 173# OMAP IOMMU support 174config OMAP_IOMMU 175 bool "OMAP IOMMU Support" 176 depends on ARM && MMU 177 depends on ARCH_OMAP2PLUS || COMPILE_TEST 178 select IOMMU_API 179 180config OMAP_IOMMU_DEBUG 181 bool "Export OMAP IOMMU internals in DebugFS" 182 depends on OMAP_IOMMU && DEBUG_FS 183 ---help--- 184 Select this to see extensive information about 185 the internal state of OMAP IOMMU in debugfs. 186 187 Say N unless you know you need this. 188 189config ROCKCHIP_IOMMU 190 bool "Rockchip IOMMU Support" 191 depends on ARM 192 depends on ARCH_ROCKCHIP || COMPILE_TEST 193 select IOMMU_API 194 select ARM_DMA_USE_IOMMU 195 help 196 Support for IOMMUs found on Rockchip rk32xx SOCs. 197 These IOMMUs allow virtualization of the address space used by most 198 cores within the multimedia subsystem. 199 Say Y here if you are using a Rockchip SoC that includes an IOMMU 200 device. 201 202config TEGRA_IOMMU_GART 203 bool "Tegra GART IOMMU Support" 204 depends on ARCH_TEGRA_2x_SOC 205 select IOMMU_API 206 help 207 Enables support for remapping discontiguous physical memory 208 shared with the operating system into contiguous I/O virtual 209 space through the GART (Graphics Address Relocation Table) 210 hardware included on Tegra SoCs. 211 212config TEGRA_IOMMU_SMMU 213 bool "NVIDIA Tegra SMMU Support" 214 depends on ARCH_TEGRA 215 depends on TEGRA_AHB 216 depends on TEGRA_MC 217 select IOMMU_API 218 help 219 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 220 SoCs (Tegra30 up to Tegra124). 221 222config EXYNOS_IOMMU 223 bool "Exynos IOMMU Support" 224 depends on ARCH_EXYNOS && ARM && MMU 225 select IOMMU_API 226 select ARM_DMA_USE_IOMMU 227 help 228 Support for the IOMMU (System MMU) of Samsung Exynos application 229 processor family. This enables H/W multimedia accelerators to see 230 non-linear physical memory chunks as linear memory in their 231 address space. 232 233 If unsure, say N here. 234 235config EXYNOS_IOMMU_DEBUG 236 bool "Debugging log for Exynos IOMMU" 237 depends on EXYNOS_IOMMU 238 help 239 Select this to see the detailed log message that shows what 240 happens in the IOMMU driver. 241 242 Say N unless you need kernel log message for IOMMU debugging. 243 244config SHMOBILE_IPMMU 245 bool 246 247config SHMOBILE_IPMMU_TLB 248 bool 249 250config SHMOBILE_IOMMU 251 bool "IOMMU for Renesas IPMMU/IPMMUI" 252 default n 253 depends on ARM && MMU 254 depends on ARCH_SHMOBILE || COMPILE_TEST 255 select IOMMU_API 256 select ARM_DMA_USE_IOMMU 257 select SHMOBILE_IPMMU 258 select SHMOBILE_IPMMU_TLB 259 help 260 Support for Renesas IPMMU/IPMMUI. This option enables 261 remapping of DMA memory accesses from all of the IP blocks 262 on the ICB. 263 264 Warning: Drivers (including userspace drivers of UIO 265 devices) of the IP blocks on the ICB *must* use addresses 266 allocated from the IPMMU (iova) for DMA with this option 267 enabled. 268 269 If unsure, say N. 270 271choice 272 prompt "IPMMU/IPMMUI address space size" 273 default SHMOBILE_IOMMU_ADDRSIZE_2048MB 274 depends on SHMOBILE_IOMMU 275 help 276 This option sets IPMMU/IPMMUI address space size by 277 adjusting the 1st level page table size. The page table size 278 is calculated as follows: 279 280 page table size = number of page table entries * 4 bytes 281 number of page table entries = address space size / 1 MiB 282 283 For example, when the address space size is 2048 MiB, the 284 1st level page table size is 8192 bytes. 285 286 config SHMOBILE_IOMMU_ADDRSIZE_2048MB 287 bool "2 GiB" 288 289 config SHMOBILE_IOMMU_ADDRSIZE_1024MB 290 bool "1 GiB" 291 292 config SHMOBILE_IOMMU_ADDRSIZE_512MB 293 bool "512 MiB" 294 295 config SHMOBILE_IOMMU_ADDRSIZE_256MB 296 bool "256 MiB" 297 298 config SHMOBILE_IOMMU_ADDRSIZE_128MB 299 bool "128 MiB" 300 301 config SHMOBILE_IOMMU_ADDRSIZE_64MB 302 bool "64 MiB" 303 304 config SHMOBILE_IOMMU_ADDRSIZE_32MB 305 bool "32 MiB" 306 307endchoice 308 309config SHMOBILE_IOMMU_L1SIZE 310 int 311 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB 312 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB 313 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB 314 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB 315 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB 316 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB 317 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB 318 319config IPMMU_VMSA 320 bool "Renesas VMSA-compatible IPMMU" 321 depends on ARM_LPAE 322 depends on ARCH_SHMOBILE || COMPILE_TEST 323 select IOMMU_API 324 select IOMMU_IO_PGTABLE_LPAE 325 select ARM_DMA_USE_IOMMU 326 help 327 Support for the Renesas VMSA-compatible IPMMU Renesas found in the 328 R-Mobile APE6 and R-Car H2/M2 SoCs. 329 330 If unsure, say N. 331 332config SPAPR_TCE_IOMMU 333 bool "sPAPR TCE IOMMU Support" 334 depends on PPC_POWERNV || PPC_PSERIES 335 select IOMMU_API 336 help 337 Enables bits of IOMMU API required by VFIO. The iommu_ops 338 is not implemented as it is not necessary for VFIO. 339 340config ARM_SMMU 341 bool "ARM Ltd. System MMU (SMMU) Support" 342 depends on (ARM64 || ARM) && MMU 343 select IOMMU_API 344 select IOMMU_IO_PGTABLE_LPAE 345 select ARM_DMA_USE_IOMMU if ARM 346 help 347 Support for implementations of the ARM System MMU architecture 348 versions 1 and 2. 349 350 Say Y here if your SoC includes an IOMMU device implementing 351 the ARM SMMU architecture. 352 353endif # IOMMU_SUPPORT 354