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 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 42endmenu 43 44config IOMMU_IOVA 45 bool 46 47config OF_IOMMU 48 def_bool y 49 depends on OF && IOMMU_API 50 51config FSL_PAMU 52 bool "Freescale IOMMU support" 53 depends on PPC32 54 depends on PPC_E500MC || COMPILE_TEST 55 select IOMMU_API 56 select GENERIC_ALLOCATOR 57 help 58 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 59 PAMU can authorize memory access, remap the memory address, and remap I/O 60 transaction types. 61 62# MSM IOMMU support 63config MSM_IOMMU 64 bool "MSM IOMMU Support" 65 depends on ARM 66 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 67 depends on BROKEN 68 select IOMMU_API 69 help 70 Support for the IOMMUs found on certain Qualcomm SOCs. 71 These IOMMUs allow virtualization of the address space used by most 72 cores within the multimedia subsystem. 73 74 If unsure, say N here. 75 76config IOMMU_PGTABLES_L2 77 def_bool y 78 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 79 80# AMD IOMMU support 81config AMD_IOMMU 82 bool "AMD IOMMU support" 83 select SWIOTLB 84 select PCI_MSI 85 select PCI_ATS 86 select PCI_PRI 87 select PCI_PASID 88 select IOMMU_API 89 depends on X86_64 && PCI && ACPI 90 ---help--- 91 With this option you can enable support for AMD IOMMU hardware in 92 your system. An IOMMU is a hardware component which provides 93 remapping of DMA memory accesses from devices. With an AMD IOMMU you 94 can isolate the DMA memory of different devices and protect the 95 system from misbehaving device drivers or hardware. 96 97 You can find out if your system has an AMD IOMMU if you look into 98 your BIOS for an option to enable it or if you have an IVRS ACPI 99 table. 100 101config AMD_IOMMU_STATS 102 bool "Export AMD IOMMU statistics to debugfs" 103 depends on AMD_IOMMU 104 select DEBUG_FS 105 ---help--- 106 This option enables code in the AMD IOMMU driver to collect various 107 statistics about whats happening in the driver and exports that 108 information to userspace via debugfs. 109 If unsure, say N. 110 111config AMD_IOMMU_V2 112 tristate "AMD IOMMU Version 2 driver" 113 depends on AMD_IOMMU 114 select MMU_NOTIFIER 115 ---help--- 116 This option enables support for the AMD IOMMUv2 features of the IOMMU 117 hardware. Select this option if you want to use devices that support 118 the PCI PRI and PASID interface. 119 120# Intel IOMMU support 121config DMAR_TABLE 122 bool 123 124config INTEL_IOMMU 125 bool "Support for Intel IOMMU using DMA Remapping Devices" 126 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 127 select IOMMU_API 128 select IOMMU_IOVA 129 select DMAR_TABLE 130 help 131 DMA remapping (DMAR) devices support enables independent address 132 translations for Direct Memory Access (DMA) from devices. 133 These DMA remapping devices are reported via ACPI tables 134 and include PCI device scope covered by these DMA 135 remapping devices. 136 137config INTEL_IOMMU_DEFAULT_ON 138 def_bool y 139 prompt "Enable Intel DMA Remapping Devices by default" 140 depends on INTEL_IOMMU 141 help 142 Selecting this option will enable a DMAR device at boot time if 143 one is found. If this option is not selected, DMAR support can 144 be enabled by passing intel_iommu=on to the kernel. 145 146config INTEL_IOMMU_BROKEN_GFX_WA 147 bool "Workaround broken graphics drivers (going away soon)" 148 depends on INTEL_IOMMU && BROKEN && X86 149 ---help--- 150 Current Graphics drivers tend to use physical address 151 for DMA and avoid using DMA APIs. Setting this config 152 option permits the IOMMU driver to set a unity map for 153 all the OS-visible memory. Hence the driver can continue 154 to use physical addresses for DMA, at least until this 155 option is removed in the 2.6.32 kernel. 156 157config INTEL_IOMMU_FLOPPY_WA 158 def_bool y 159 depends on INTEL_IOMMU && X86 160 ---help--- 161 Floppy disk drivers are known to bypass DMA API calls 162 thereby failing to work when IOMMU is enabled. This 163 workaround will setup a 1:1 mapping for the first 164 16MiB to make floppy (an ISA device) work. 165 166config IRQ_REMAP 167 bool "Support for Interrupt Remapping" 168 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 169 select DMAR_TABLE 170 ---help--- 171 Supports Interrupt remapping for IO-APIC and MSI devices. 172 To use x2apic mode in the CPU's which support x2APIC enhancements or 173 to support platforms with CPU's having > 8 bit APIC ID, say Y. 174 175# OMAP IOMMU support 176config OMAP_IOMMU 177 bool "OMAP IOMMU Support" 178 depends on ARM && MMU 179 depends on ARCH_OMAP2PLUS || COMPILE_TEST 180 select IOMMU_API 181 182config OMAP_IOMMU_DEBUG 183 bool "Export OMAP IOMMU internals in DebugFS" 184 depends on OMAP_IOMMU && DEBUG_FS 185 ---help--- 186 Select this to see extensive information about 187 the internal state of OMAP IOMMU in debugfs. 188 189 Say N unless you know you need this. 190 191config ROCKCHIP_IOMMU 192 bool "Rockchip IOMMU Support" 193 depends on ARM 194 depends on ARCH_ROCKCHIP || COMPILE_TEST 195 select IOMMU_API 196 select ARM_DMA_USE_IOMMU 197 help 198 Support for IOMMUs found on Rockchip rk32xx SOCs. 199 These IOMMUs allow virtualization of the address space used by most 200 cores within the multimedia subsystem. 201 Say Y here if you are using a Rockchip SoC that includes an IOMMU 202 device. 203 204config TEGRA_IOMMU_GART 205 bool "Tegra GART IOMMU Support" 206 depends on ARCH_TEGRA_2x_SOC 207 select IOMMU_API 208 help 209 Enables support for remapping discontiguous physical memory 210 shared with the operating system into contiguous I/O virtual 211 space through the GART (Graphics Address Relocation Table) 212 hardware included on Tegra SoCs. 213 214config TEGRA_IOMMU_SMMU 215 bool "NVIDIA Tegra SMMU Support" 216 depends on ARCH_TEGRA 217 depends on TEGRA_AHB 218 depends on TEGRA_MC 219 select IOMMU_API 220 help 221 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 222 SoCs (Tegra30 up to Tegra124). 223 224config EXYNOS_IOMMU 225 bool "Exynos IOMMU Support" 226 depends on ARCH_EXYNOS && ARM && MMU 227 select IOMMU_API 228 select ARM_DMA_USE_IOMMU 229 help 230 Support for the IOMMU (System MMU) of Samsung Exynos application 231 processor family. This enables H/W multimedia accelerators to see 232 non-linear physical memory chunks as linear memory in their 233 address space. 234 235 If unsure, say N here. 236 237config EXYNOS_IOMMU_DEBUG 238 bool "Debugging log for Exynos IOMMU" 239 depends on EXYNOS_IOMMU 240 help 241 Select this to see the detailed log message that shows what 242 happens in the IOMMU driver. 243 244 Say N unless you need kernel log message for IOMMU debugging. 245 246config SHMOBILE_IPMMU 247 bool 248 249config SHMOBILE_IPMMU_TLB 250 bool 251 252config SHMOBILE_IOMMU 253 bool "IOMMU for Renesas IPMMU/IPMMUI" 254 default n 255 depends on ARM && MMU 256 depends on ARCH_SHMOBILE || COMPILE_TEST 257 select IOMMU_API 258 select ARM_DMA_USE_IOMMU 259 select SHMOBILE_IPMMU 260 select SHMOBILE_IPMMU_TLB 261 help 262 Support for Renesas IPMMU/IPMMUI. This option enables 263 remapping of DMA memory accesses from all of the IP blocks 264 on the ICB. 265 266 Warning: Drivers (including userspace drivers of UIO 267 devices) of the IP blocks on the ICB *must* use addresses 268 allocated from the IPMMU (iova) for DMA with this option 269 enabled. 270 271 If unsure, say N. 272 273choice 274 prompt "IPMMU/IPMMUI address space size" 275 default SHMOBILE_IOMMU_ADDRSIZE_2048MB 276 depends on SHMOBILE_IOMMU 277 help 278 This option sets IPMMU/IPMMUI address space size by 279 adjusting the 1st level page table size. The page table size 280 is calculated as follows: 281 282 page table size = number of page table entries * 4 bytes 283 number of page table entries = address space size / 1 MiB 284 285 For example, when the address space size is 2048 MiB, the 286 1st level page table size is 8192 bytes. 287 288 config SHMOBILE_IOMMU_ADDRSIZE_2048MB 289 bool "2 GiB" 290 291 config SHMOBILE_IOMMU_ADDRSIZE_1024MB 292 bool "1 GiB" 293 294 config SHMOBILE_IOMMU_ADDRSIZE_512MB 295 bool "512 MiB" 296 297 config SHMOBILE_IOMMU_ADDRSIZE_256MB 298 bool "256 MiB" 299 300 config SHMOBILE_IOMMU_ADDRSIZE_128MB 301 bool "128 MiB" 302 303 config SHMOBILE_IOMMU_ADDRSIZE_64MB 304 bool "64 MiB" 305 306 config SHMOBILE_IOMMU_ADDRSIZE_32MB 307 bool "32 MiB" 308 309endchoice 310 311config SHMOBILE_IOMMU_L1SIZE 312 int 313 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB 314 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB 315 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB 316 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB 317 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB 318 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB 319 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB 320 321config IPMMU_VMSA 322 bool "Renesas VMSA-compatible IPMMU" 323 depends on ARM_LPAE 324 depends on ARCH_SHMOBILE || COMPILE_TEST 325 select IOMMU_API 326 select IOMMU_IO_PGTABLE_LPAE 327 select ARM_DMA_USE_IOMMU 328 help 329 Support for the Renesas VMSA-compatible IPMMU Renesas found in the 330 R-Mobile APE6 and R-Car H2/M2 SoCs. 331 332 If unsure, say N. 333 334config SPAPR_TCE_IOMMU 335 bool "sPAPR TCE IOMMU Support" 336 depends on PPC_POWERNV || PPC_PSERIES 337 select IOMMU_API 338 help 339 Enables bits of IOMMU API required by VFIO. The iommu_ops 340 is not implemented as it is not necessary for VFIO. 341 342config ARM_SMMU 343 bool "ARM Ltd. System MMU (SMMU) Support" 344 depends on (ARM64 || ARM) && MMU 345 select IOMMU_API 346 select IOMMU_IO_PGTABLE_LPAE 347 select ARM_DMA_USE_IOMMU if ARM 348 help 349 Support for implementations of the ARM System MMU architecture 350 versions 1 and 2. 351 352 Say Y here if your SoC includes an IOMMU device implementing 353 the ARM SMMU architecture. 354 355endif # IOMMU_SUPPORT 356