1ab493a0fSOhad Ben-Cohen# IOMMU_API always gets selected by whoever wants it. 2ab493a0fSOhad Ben-Cohenconfig IOMMU_API 3ab493a0fSOhad Ben-Cohen bool 4b10f127eSOhad Ben-Cohen 568255b62SJoerg Roedelmenuconfig IOMMU_SUPPORT 668255b62SJoerg Roedel bool "IOMMU Hardware Support" 7e5144c93SArnd Bergmann depends on MMU 868255b62SJoerg Roedel default y 968255b62SJoerg Roedel ---help--- 1068255b62SJoerg Roedel Say Y here if you want to compile device drivers for IO Memory 1168255b62SJoerg Roedel Management Units into the kernel. These devices usually allow to 1268255b62SJoerg Roedel remap DMA requests and/or remap interrupts from other devices on the 1368255b62SJoerg Roedel system. 1468255b62SJoerg Roedel 1568255b62SJoerg Roedelif IOMMU_SUPPORT 1668255b62SJoerg Roedel 17fdb1d7beSWill Deaconmenu "Generic IOMMU Pagetable Support" 18fdb1d7beSWill Deacon 19fdb1d7beSWill Deacon# Selected by the actual pagetable implementations 20fdb1d7beSWill Deaconconfig IOMMU_IO_PGTABLE 21fdb1d7beSWill Deacon bool 22fdb1d7beSWill Deacon 23e1d3c0fdSWill Deaconconfig IOMMU_IO_PGTABLE_LPAE 24e1d3c0fdSWill Deacon bool "ARMv7/v8 Long Descriptor Format" 25e1d3c0fdSWill Deacon select IOMMU_IO_PGTABLE 26ffcb6d16SRobin Murphy depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) 27e1d3c0fdSWill Deacon help 28e1d3c0fdSWill Deacon Enable support for the ARM long descriptor pagetable format. 29e1d3c0fdSWill Deacon This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page 30e1d3c0fdSWill Deacon sizes at both stage-1 and stage-2, as well as address spaces 31e1d3c0fdSWill Deacon up to 48-bits in size. 32e1d3c0fdSWill Deacon 33fe4b991dSWill Deaconconfig IOMMU_IO_PGTABLE_LPAE_SELFTEST 34fe4b991dSWill Deacon bool "LPAE selftests" 35fe4b991dSWill Deacon depends on IOMMU_IO_PGTABLE_LPAE 36fe4b991dSWill Deacon help 37fe4b991dSWill Deacon Enable self-tests for LPAE page table allocator. This performs 38fe4b991dSWill Deacon a series of page-table consistency checks during boot. 39fe4b991dSWill Deacon 40fe4b991dSWill Deacon If unsure, say N here. 41fe4b991dSWill Deacon 42e5fc9753SRobin Murphyconfig IOMMU_IO_PGTABLE_ARMV7S 43e5fc9753SRobin Murphy bool "ARMv7/v8 Short Descriptor Format" 44e5fc9753SRobin Murphy select IOMMU_IO_PGTABLE 45e5fc9753SRobin Murphy depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) 46e5fc9753SRobin Murphy help 47e5fc9753SRobin Murphy Enable support for the ARM Short-descriptor pagetable format. 48e5fc9753SRobin Murphy This supports 32-bit virtual and physical addresses mapped using 49e5fc9753SRobin Murphy 2-level tables with 4KB pages/1MB sections, and contiguous entries 50e5fc9753SRobin Murphy for 64KB pages/16MB supersections if indicated by the IOMMU driver. 51e5fc9753SRobin Murphy 52e5fc9753SRobin Murphyconfig IOMMU_IO_PGTABLE_ARMV7S_SELFTEST 53e5fc9753SRobin Murphy bool "ARMv7s selftests" 54e5fc9753SRobin Murphy depends on IOMMU_IO_PGTABLE_ARMV7S 55e5fc9753SRobin Murphy help 56e5fc9753SRobin Murphy Enable self-tests for ARMv7s page table allocator. This performs 57e5fc9753SRobin Murphy a series of page-table consistency checks during boot. 58e5fc9753SRobin Murphy 59e5fc9753SRobin Murphy If unsure, say N here. 60e5fc9753SRobin Murphy 61fdb1d7beSWill Deaconendmenu 62fdb1d7beSWill Deacon 63114150d8SRobin Murphyconfig IOMMU_IOVA 6415bbdec3SSakari Ailus tristate 65114150d8SRobin Murphy 664e0ee78fSHiroshi Doyuconfig OF_IOMMU 674e0ee78fSHiroshi Doyu def_bool y 687eba1d51SWill Deacon depends on OF && IOMMU_API 694e0ee78fSHiroshi Doyu 700db2e5d1SRobin Murphy# IOMMU-agnostic DMA-mapping layer 710db2e5d1SRobin Murphyconfig IOMMU_DMA 720db2e5d1SRobin Murphy bool 730db2e5d1SRobin Murphy select IOMMU_API 740db2e5d1SRobin Murphy select IOMMU_IOVA 7559a68eb8SRobin Murphy select NEED_SG_DMA_LENGTH 760db2e5d1SRobin Murphy 77695093e3SVarun Sethiconfig FSL_PAMU 78695093e3SVarun Sethi bool "Freescale IOMMU support" 79a0d284d2SAndy Fleming depends on PPC_E500MC || (COMPILE_TEST && PPC) 80695093e3SVarun Sethi select IOMMU_API 81695093e3SVarun Sethi select GENERIC_ALLOCATOR 82695093e3SVarun Sethi help 83695093e3SVarun Sethi Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. 84695093e3SVarun Sethi PAMU can authorize memory access, remap the memory address, and remap I/O 85695093e3SVarun Sethi transaction types. 86695093e3SVarun Sethi 87b10f127eSOhad Ben-Cohen# MSM IOMMU support 88b10f127eSOhad Ben-Cohenconfig MSM_IOMMU 89b10f127eSOhad Ben-Cohen bool "MSM IOMMU Support" 90477ab7a1SJoerg Roedel depends on ARM 91477ab7a1SJoerg Roedel depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST 92a3f447a4SThierry Reding depends on BROKEN 93b10f127eSOhad Ben-Cohen select IOMMU_API 94b10f127eSOhad Ben-Cohen help 95b10f127eSOhad Ben-Cohen Support for the IOMMUs found on certain Qualcomm SOCs. 96b10f127eSOhad Ben-Cohen These IOMMUs allow virtualization of the address space used by most 97b10f127eSOhad Ben-Cohen cores within the multimedia subsystem. 98b10f127eSOhad Ben-Cohen 99b10f127eSOhad Ben-Cohen If unsure, say N here. 100b10f127eSOhad Ben-Cohen 101b10f127eSOhad Ben-Cohenconfig IOMMU_PGTABLES_L2 102b10f127eSOhad Ben-Cohen def_bool y 103b10f127eSOhad Ben-Cohen depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 10429b68415SOhad Ben-Cohen 10529b68415SOhad Ben-Cohen# AMD IOMMU support 10629b68415SOhad Ben-Cohenconfig AMD_IOMMU 10729b68415SOhad Ben-Cohen bool "AMD IOMMU support" 10829b68415SOhad Ben-Cohen select SWIOTLB 10929b68415SOhad Ben-Cohen select PCI_MSI 11052815b75SJoerg Roedel select PCI_ATS 11152815b75SJoerg Roedel select PCI_PRI 11252815b75SJoerg Roedel select PCI_PASID 11329b68415SOhad Ben-Cohen select IOMMU_API 1140dbc6078SThomas Petazzoni depends on X86_64 && PCI && ACPI 11529b68415SOhad Ben-Cohen ---help--- 11629b68415SOhad Ben-Cohen With this option you can enable support for AMD IOMMU hardware in 11729b68415SOhad Ben-Cohen your system. An IOMMU is a hardware component which provides 11829b68415SOhad Ben-Cohen remapping of DMA memory accesses from devices. With an AMD IOMMU you 11959bf8964SMasanari Iida can isolate the DMA memory of different devices and protect the 12029b68415SOhad Ben-Cohen system from misbehaving device drivers or hardware. 12129b68415SOhad Ben-Cohen 12229b68415SOhad Ben-Cohen You can find out if your system has an AMD IOMMU if you look into 12329b68415SOhad Ben-Cohen your BIOS for an option to enable it or if you have an IVRS ACPI 12429b68415SOhad Ben-Cohen table. 12529b68415SOhad Ben-Cohen 126e3c495c7SJoerg Roedelconfig AMD_IOMMU_V2 127a446e219SKees Cook tristate "AMD IOMMU Version 2 driver" 128e5cac32cSBorislav Petkov depends on AMD_IOMMU 1298736b2c3SJoerg Roedel select MMU_NOTIFIER 130e3c495c7SJoerg Roedel ---help--- 131e3c495c7SJoerg Roedel This option enables support for the AMD IOMMUv2 features of the IOMMU 132e3c495c7SJoerg Roedel hardware. Select this option if you want to use devices that support 13359bf8964SMasanari Iida the PCI PRI and PASID interface. 134e3c495c7SJoerg Roedel 135166e9278SOhad Ben-Cohen# Intel IOMMU support 136d3f13810SSuresh Siddhaconfig DMAR_TABLE 137d3f13810SSuresh Siddha bool 138d3f13810SSuresh Siddha 139d3f13810SSuresh Siddhaconfig INTEL_IOMMU 140d3f13810SSuresh Siddha bool "Support for Intel IOMMU using DMA Remapping Devices" 141166e9278SOhad Ben-Cohen depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 142166e9278SOhad Ben-Cohen select IOMMU_API 143114150d8SRobin Murphy select IOMMU_IOVA 144d3f13810SSuresh Siddha select DMAR_TABLE 145166e9278SOhad Ben-Cohen help 146166e9278SOhad Ben-Cohen DMA remapping (DMAR) devices support enables independent address 147166e9278SOhad Ben-Cohen translations for Direct Memory Access (DMA) from devices. 148166e9278SOhad Ben-Cohen These DMA remapping devices are reported via ACPI tables 149166e9278SOhad Ben-Cohen and include PCI device scope covered by these DMA 150166e9278SOhad Ben-Cohen remapping devices. 151166e9278SOhad Ben-Cohen 1528a94ade4SDavid Woodhouseconfig INTEL_IOMMU_SVM 1538a94ade4SDavid Woodhouse bool "Support for Shared Virtual Memory with Intel IOMMU" 1548a94ade4SDavid Woodhouse depends on INTEL_IOMMU && X86 155b16d0cb9SDavid Woodhouse select PCI_PASID 1562f26e0a9SDavid Woodhouse select MMU_NOTIFIER 1578a94ade4SDavid Woodhouse help 1588a94ade4SDavid Woodhouse Shared Virtual Memory (SVM) provides a facility for devices 1598a94ade4SDavid Woodhouse to access DMA resources through process address space by 1608a94ade4SDavid Woodhouse means of a Process Address Space ID (PASID). 1618a94ade4SDavid Woodhouse 162d3f13810SSuresh Siddhaconfig INTEL_IOMMU_DEFAULT_ON 163166e9278SOhad Ben-Cohen def_bool y 164d3f13810SSuresh Siddha prompt "Enable Intel DMA Remapping Devices by default" 165d3f13810SSuresh Siddha depends on INTEL_IOMMU 166166e9278SOhad Ben-Cohen help 167166e9278SOhad Ben-Cohen Selecting this option will enable a DMAR device at boot time if 168166e9278SOhad Ben-Cohen one is found. If this option is not selected, DMAR support can 169166e9278SOhad Ben-Cohen be enabled by passing intel_iommu=on to the kernel. 170166e9278SOhad Ben-Cohen 171d3f13810SSuresh Siddhaconfig INTEL_IOMMU_BROKEN_GFX_WA 172166e9278SOhad Ben-Cohen bool "Workaround broken graphics drivers (going away soon)" 173d3f13810SSuresh Siddha depends on INTEL_IOMMU && BROKEN && X86 174166e9278SOhad Ben-Cohen ---help--- 175166e9278SOhad Ben-Cohen Current Graphics drivers tend to use physical address 176166e9278SOhad Ben-Cohen for DMA and avoid using DMA APIs. Setting this config 177166e9278SOhad Ben-Cohen option permits the IOMMU driver to set a unity map for 178166e9278SOhad Ben-Cohen all the OS-visible memory. Hence the driver can continue 179166e9278SOhad Ben-Cohen to use physical addresses for DMA, at least until this 180166e9278SOhad Ben-Cohen option is removed in the 2.6.32 kernel. 181166e9278SOhad Ben-Cohen 182d3f13810SSuresh Siddhaconfig INTEL_IOMMU_FLOPPY_WA 183166e9278SOhad Ben-Cohen def_bool y 184d3f13810SSuresh Siddha depends on INTEL_IOMMU && X86 185166e9278SOhad Ben-Cohen ---help--- 186166e9278SOhad Ben-Cohen Floppy disk drivers are known to bypass DMA API calls 187166e9278SOhad Ben-Cohen thereby failing to work when IOMMU is enabled. This 188166e9278SOhad Ben-Cohen workaround will setup a 1:1 mapping for the first 189166e9278SOhad Ben-Cohen 16MiB to make floppy (an ISA device) work. 190166e9278SOhad Ben-Cohen 191d3f13810SSuresh Siddhaconfig IRQ_REMAP 192a446e219SKees Cook bool "Support for Interrupt Remapping" 193a446e219SKees Cook depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI 194d3f13810SSuresh Siddha select DMAR_TABLE 195166e9278SOhad Ben-Cohen ---help--- 196166e9278SOhad Ben-Cohen Supports Interrupt remapping for IO-APIC and MSI devices. 197166e9278SOhad Ben-Cohen To use x2apic mode in the CPU's which support x2APIC enhancements or 198166e9278SOhad Ben-Cohen to support platforms with CPU's having > 8 bit APIC ID, say Y. 19968255b62SJoerg Roedel 200fcf3a6efSOhad Ben-Cohen# OMAP IOMMU support 201fcf3a6efSOhad Ben-Cohenconfig OMAP_IOMMU 202fcf3a6efSOhad Ben-Cohen bool "OMAP IOMMU Support" 203477ab7a1SJoerg Roedel depends on ARM && MMU 204477ab7a1SJoerg Roedel depends on ARCH_OMAP2PLUS || COMPILE_TEST 205fcf3a6efSOhad Ben-Cohen select IOMMU_API 20606b718c0SGerd Hoffmann ---help--- 20706b718c0SGerd Hoffmann The OMAP3 media platform drivers depend on iommu support, 20806b718c0SGerd Hoffmann if you need them say Y here. 209fcf3a6efSOhad Ben-Cohen 210fcf3a6efSOhad Ben-Cohenconfig OMAP_IOMMU_DEBUG 21161c75352SSuman Anna bool "Export OMAP IOMMU internals in DebugFS" 212baaa7b5dSLaurent Pinchart depends on OMAP_IOMMU && DEBUG_FS 21361c75352SSuman Anna ---help--- 214fcf3a6efSOhad Ben-Cohen Select this to see extensive information about 215baaa7b5dSLaurent Pinchart the internal state of OMAP IOMMU in debugfs. 216fcf3a6efSOhad Ben-Cohen 217fcf3a6efSOhad Ben-Cohen Say N unless you know you need this. 218fcf3a6efSOhad Ben-Cohen 219c68a2921SDaniel Kurtzconfig ROCKCHIP_IOMMU 220c68a2921SDaniel Kurtz bool "Rockchip IOMMU Support" 22111175886SJoerg Roedel depends on ARM 22211175886SJoerg Roedel depends on ARCH_ROCKCHIP || COMPILE_TEST 223c68a2921SDaniel Kurtz select IOMMU_API 224c68a2921SDaniel Kurtz select ARM_DMA_USE_IOMMU 225c68a2921SDaniel Kurtz help 226c68a2921SDaniel Kurtz Support for IOMMUs found on Rockchip rk32xx SOCs. 227c68a2921SDaniel Kurtz These IOMMUs allow virtualization of the address space used by most 228c68a2921SDaniel Kurtz cores within the multimedia subsystem. 229c68a2921SDaniel Kurtz Say Y here if you are using a Rockchip SoC that includes an IOMMU 230c68a2921SDaniel Kurtz device. 231c68a2921SDaniel Kurtz 232d53e54b4SHiroshi DOYUconfig TEGRA_IOMMU_GART 233d53e54b4SHiroshi DOYU bool "Tegra GART IOMMU Support" 234d53e54b4SHiroshi DOYU depends on ARCH_TEGRA_2x_SOC 235d53e54b4SHiroshi DOYU select IOMMU_API 236d53e54b4SHiroshi DOYU help 237d53e54b4SHiroshi DOYU Enables support for remapping discontiguous physical memory 238d53e54b4SHiroshi DOYU shared with the operating system into contiguous I/O virtual 239d53e54b4SHiroshi DOYU space through the GART (Graphics Address Relocation Table) 240d53e54b4SHiroshi DOYU hardware included on Tegra SoCs. 241d53e54b4SHiroshi DOYU 2427a31f6f4SHiroshi DOYUconfig TEGRA_IOMMU_SMMU 24389184651SThierry Reding bool "NVIDIA Tegra SMMU Support" 24489184651SThierry Reding depends on ARCH_TEGRA 24589184651SThierry Reding depends on TEGRA_AHB 24689184651SThierry Reding depends on TEGRA_MC 2477a31f6f4SHiroshi DOYU select IOMMU_API 2487a31f6f4SHiroshi DOYU help 24989184651SThierry Reding This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra 250588c43a7SThierry Reding SoCs (Tegra30 up to Tegra210). 2517a31f6f4SHiroshi DOYU 2522a96536eSKyongHo Choconfig EXYNOS_IOMMU 2532a96536eSKyongHo Cho bool "Exynos IOMMU Support" 254740a01eeSMarek Szyprowski depends on ARCH_EXYNOS && MMU 2552a96536eSKyongHo Cho select IOMMU_API 2564802c1d0STushar Behera select ARM_DMA_USE_IOMMU 2572a96536eSKyongHo Cho help 2582a96536eSKyongHo Cho Support for the IOMMU (System MMU) of Samsung Exynos application 2595455d700SSachin Kamat processor family. This enables H/W multimedia accelerators to see 2605455d700SSachin Kamat non-linear physical memory chunks as linear memory in their 2615455d700SSachin Kamat address space. 2622a96536eSKyongHo Cho 2632a96536eSKyongHo Cho If unsure, say N here. 2642a96536eSKyongHo Cho 2652a96536eSKyongHo Choconfig EXYNOS_IOMMU_DEBUG 2662a96536eSKyongHo Cho bool "Debugging log for Exynos IOMMU" 2672a96536eSKyongHo Cho depends on EXYNOS_IOMMU 2682a96536eSKyongHo Cho help 2692a96536eSKyongHo Cho Select this to see the detailed log message that shows what 2705455d700SSachin Kamat happens in the IOMMU driver. 2712a96536eSKyongHo Cho 2725455d700SSachin Kamat Say N unless you need kernel log message for IOMMU debugging. 2732a96536eSKyongHo Cho 274d25a2a16SLaurent Pinchartconfig IPMMU_VMSA 275d25a2a16SLaurent Pinchart bool "Renesas VMSA-compatible IPMMU" 276d25a2a16SLaurent Pinchart depends on ARM_LPAE 2779015ba45SSimon Horman depends on ARCH_RENESAS || COMPILE_TEST 278d25a2a16SLaurent Pinchart select IOMMU_API 279f20ed39fSLaurent Pinchart select IOMMU_IO_PGTABLE_LPAE 280d25a2a16SLaurent Pinchart select ARM_DMA_USE_IOMMU 281d25a2a16SLaurent Pinchart help 282d25a2a16SLaurent Pinchart Support for the Renesas VMSA-compatible IPMMU Renesas found in the 283d25a2a16SLaurent Pinchart R-Mobile APE6 and R-Car H2/M2 SoCs. 284d25a2a16SLaurent Pinchart 285d25a2a16SLaurent Pinchart If unsure, say N. 286d25a2a16SLaurent Pinchart 2874e13c1acSAlexey Kardashevskiyconfig SPAPR_TCE_IOMMU 2884e13c1acSAlexey Kardashevskiy bool "sPAPR TCE IOMMU Support" 2895b25199eSAlexey Kardashevskiy depends on PPC_POWERNV || PPC_PSERIES 2904e13c1acSAlexey Kardashevskiy select IOMMU_API 2914e13c1acSAlexey Kardashevskiy help 2924e13c1acSAlexey Kardashevskiy Enables bits of IOMMU API required by VFIO. The iommu_ops 2934e13c1acSAlexey Kardashevskiy is not implemented as it is not necessary for VFIO. 2944e13c1acSAlexey Kardashevskiy 29548ec83bcSWill Deacon# ARM IOMMU support 29645ae7cffSWill Deaconconfig ARM_SMMU 29745ae7cffSWill Deacon bool "ARM Ltd. System MMU (SMMU) Support" 298a20cc76bSJoerg Roedel depends on (ARM64 || ARM) && MMU 29945ae7cffSWill Deacon select IOMMU_API 300518f7136SWill Deacon select IOMMU_IO_PGTABLE_LPAE 30145ae7cffSWill Deacon select ARM_DMA_USE_IOMMU if ARM 30245ae7cffSWill Deacon help 30345ae7cffSWill Deacon Support for implementations of the ARM System MMU architecture 304518f7136SWill Deacon versions 1 and 2. 30545ae7cffSWill Deacon 30645ae7cffSWill Deacon Say Y here if your SoC includes an IOMMU device implementing 30745ae7cffSWill Deacon the ARM SMMU architecture. 30845ae7cffSWill Deacon 30948ec83bcSWill Deaconconfig ARM_SMMU_V3 31048ec83bcSWill Deacon bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" 31148ec83bcSWill Deacon depends on ARM64 && PCI 31248ec83bcSWill Deacon select IOMMU_API 31348ec83bcSWill Deacon select IOMMU_IO_PGTABLE_LPAE 314166bdbd2SMarc Zyngier select GENERIC_MSI_IRQ_DOMAIN 31548ec83bcSWill Deacon help 31648ec83bcSWill Deacon Support for implementations of the ARM System MMU architecture 31748ec83bcSWill Deacon version 3 providing translation support to a PCIe root complex. 31848ec83bcSWill Deacon 31948ec83bcSWill Deacon Say Y here if your system includes an IOMMU device implementing 32048ec83bcSWill Deacon the ARM SMMUv3 architecture. 32148ec83bcSWill Deacon 3228128f23cSGerald Schaeferconfig S390_IOMMU 3238128f23cSGerald Schaefer def_bool y if S390 && PCI 3248128f23cSGerald Schaefer depends on S390 && PCI 3258128f23cSGerald Schaefer select IOMMU_API 3268128f23cSGerald Schaefer help 3278128f23cSGerald Schaefer Support for the IOMMU API for s390 PCI devices. 3288128f23cSGerald Schaefer 3290df4fabeSYong Wuconfig MTK_IOMMU 3300df4fabeSYong Wu bool "MTK IOMMU Support" 3310df4fabeSYong Wu depends on ARM || ARM64 3320df4fabeSYong Wu depends on ARCH_MEDIATEK || COMPILE_TEST 3331928832fSArnd Bergmann select ARM_DMA_USE_IOMMU 3340df4fabeSYong Wu select IOMMU_API 3350df4fabeSYong Wu select IOMMU_DMA 3360df4fabeSYong Wu select IOMMU_IO_PGTABLE_ARMV7S 3370df4fabeSYong Wu select MEMORY 3380df4fabeSYong Wu select MTK_SMI 3390df4fabeSYong Wu help 3400df4fabeSYong Wu Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia 3410df4fabeSYong Wu Memory Management Unit. This option enables remapping of DMA memory 3420df4fabeSYong Wu accesses for the multimedia subsystem. 3430df4fabeSYong Wu 3440df4fabeSYong Wu If unsure, say N here. 3450df4fabeSYong Wu 346b17336c5SHonghui Zhangconfig MTK_IOMMU_V1 347b17336c5SHonghui Zhang bool "MTK IOMMU Version 1 (M4U gen1) Support" 348b17336c5SHonghui Zhang depends on ARM 349b17336c5SHonghui Zhang depends on ARCH_MEDIATEK || COMPILE_TEST 350b17336c5SHonghui Zhang select ARM_DMA_USE_IOMMU 351b17336c5SHonghui Zhang select IOMMU_API 352b17336c5SHonghui Zhang select MEMORY 353b17336c5SHonghui Zhang select MTK_SMI 354b17336c5SHonghui Zhang select COMMON_CLK_MT2701_MMSYS 355b17336c5SHonghui Zhang select COMMON_CLK_MT2701_IMGSYS 356b17336c5SHonghui Zhang select COMMON_CLK_MT2701_VDECSYS 357b17336c5SHonghui Zhang help 358b17336c5SHonghui Zhang Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is 359b17336c5SHonghui Zhang Multimedia Memory Managememt Unit. This option enables remapping of 360b17336c5SHonghui Zhang DMA memory accesses for the multimedia subsystem. 361b17336c5SHonghui Zhang 362b17336c5SHonghui Zhang if unsure, say N here. 363b17336c5SHonghui Zhang 36468255b62SJoerg Roedelendif # IOMMU_SUPPORT 365