| # IOMMU_API always gets selected by whoever wants it. | |
| config IOMMU_API | |
| bool | |
| menuconfig IOMMU_SUPPORT | |
| bool "IOMMU Hardware Support" | |
| depends on MMU | |
| default y | |
| ---help--- | |
| Say Y here if you want to compile device drivers for IO Memory | |
| Management Units into the kernel. These devices usually allow to | |
| remap DMA requests and/or remap interrupts from other devices on the | |
| system. | |
| if IOMMU_SUPPORT | |
| menu "Generic IOMMU Pagetable Support" | |
| # Selected by the actual pagetable implementations | |
| config IOMMU_IO_PGTABLE | |
| bool | |
| config IOMMU_IO_PGTABLE_LPAE | |
| bool "ARMv7/v8 Long Descriptor Format" | |
| select IOMMU_IO_PGTABLE | |
| depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) | |
| help | |
| Enable support for the ARM long descriptor pagetable format. | |
| This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page | |
| sizes at both stage-1 and stage-2, as well as address spaces | |
| up to 48-bits in size. | |
| config IOMMU_IO_PGTABLE_LPAE_SELFTEST | |
| bool "LPAE selftests" | |
| depends on IOMMU_IO_PGTABLE_LPAE | |
| help | |
| Enable self-tests for LPAE page table allocator. This performs | |
| a series of page-table consistency checks during boot. | |
| If unsure, say N here. | |
| config IOMMU_IO_PGTABLE_ARMV7S | |
| bool "ARMv7/v8 Short Descriptor Format" | |
| select IOMMU_IO_PGTABLE | |
| depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST) | |
| help | |
| Enable support for the ARM Short-descriptor pagetable format. | |
| This supports 32-bit virtual and physical addresses mapped using | |
| 2-level tables with 4KB pages/1MB sections, and contiguous entries | |
| for 64KB pages/16MB supersections if indicated by the IOMMU driver. | |
| config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST | |
| bool "ARMv7s selftests" | |
| depends on IOMMU_IO_PGTABLE_ARMV7S | |
| help | |
| Enable self-tests for ARMv7s page table allocator. This performs | |
| a series of page-table consistency checks during boot. | |
| If unsure, say N here. | |
| endmenu | |
| config IOMMU_IOVA | |
| tristate | |
| config OF_IOMMU | |
| def_bool y | |
| depends on OF && IOMMU_API | |
| # IOMMU-agnostic DMA-mapping layer | |
| config IOMMU_DMA | |
| bool | |
| select IOMMU_API | |
| select IOMMU_IOVA | |
| select NEED_SG_DMA_LENGTH | |
| config FSL_PAMU | |
| bool "Freescale IOMMU support" | |
| depends on PPC_E500MC || (COMPILE_TEST && PPC) | |
| select IOMMU_API | |
| select GENERIC_ALLOCATOR | |
| help | |
| Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. | |
| PAMU can authorize memory access, remap the memory address, and remap I/O | |
| transaction types. | |
| # MSM IOMMU support | |
| config MSM_IOMMU | |
| bool "MSM IOMMU Support" | |
| depends on ARM | |
| depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST | |
| select IOMMU_API | |
| select IOMMU_IO_PGTABLE_ARMV7S | |
| help | |
| Support for the IOMMUs found on certain Qualcomm SOCs. | |
| These IOMMUs allow virtualization of the address space used by most | |
| cores within the multimedia subsystem. | |
| If unsure, say N here. | |
| config IOMMU_PGTABLES_L2 | |
| def_bool y | |
| depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n | |
| # AMD IOMMU support | |
| config AMD_IOMMU | |
| bool "AMD IOMMU support" | |
| select SWIOTLB | |
| select PCI_MSI | |
| select PCI_ATS | |
| select PCI_PRI | |
| select PCI_PASID | |
| select IOMMU_API | |
| select IOMMU_IOVA | |
| depends on X86_64 && PCI && ACPI | |
| ---help--- | |
| With this option you can enable support for AMD IOMMU hardware in | |
| your system. An IOMMU is a hardware component which provides | |
| remapping of DMA memory accesses from devices. With an AMD IOMMU you | |
| can isolate the DMA memory of different devices and protect the | |
| system from misbehaving device drivers or hardware. | |
| You can find out if your system has an AMD IOMMU if you look into | |
| your BIOS for an option to enable it or if you have an IVRS ACPI | |
| table. | |
| config AMD_IOMMU_V2 | |
| tristate "AMD IOMMU Version 2 driver" | |
| depends on AMD_IOMMU | |
| select MMU_NOTIFIER | |
| ---help--- | |
| This option enables support for the AMD IOMMUv2 features of the IOMMU | |
| hardware. Select this option if you want to use devices that support | |
| the PCI PRI and PASID interface. | |
| # Intel IOMMU support | |
| config DMAR_TABLE | |
| bool | |
| config INTEL_IOMMU | |
| bool "Support for Intel IOMMU using DMA Remapping Devices" | |
| depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) | |
| select IOMMU_API | |
| select IOMMU_IOVA | |
| select DMAR_TABLE | |
| help | |
| DMA remapping (DMAR) devices support enables independent address | |
| translations for Direct Memory Access (DMA) from devices. | |
| These DMA remapping devices are reported via ACPI tables | |
| and include PCI device scope covered by these DMA | |
| remapping devices. | |
| config INTEL_IOMMU_SVM | |
| bool "Support for Shared Virtual Memory with Intel IOMMU" | |
| depends on INTEL_IOMMU && X86 | |
| select PCI_PASID | |
| select MMU_NOTIFIER | |
| help | |
| Shared Virtual Memory (SVM) provides a facility for devices | |
| to access DMA resources through process address space by | |
| means of a Process Address Space ID (PASID). | |
| config INTEL_IOMMU_DEFAULT_ON | |
| def_bool y | |
| prompt "Enable Intel DMA Remapping Devices by default" | |
| depends on INTEL_IOMMU | |
| help | |
| Selecting this option will enable a DMAR device at boot time if | |
| one is found. If this option is not selected, DMAR support can | |
| be enabled by passing intel_iommu=on to the kernel. | |
| config INTEL_IOMMU_BROKEN_GFX_WA | |
| bool "Workaround broken graphics drivers (going away soon)" | |
| depends on INTEL_IOMMU && BROKEN && X86 | |
| ---help--- | |
| Current Graphics drivers tend to use physical address | |
| for DMA and avoid using DMA APIs. Setting this config | |
| option permits the IOMMU driver to set a unity map for | |
| all the OS-visible memory. Hence the driver can continue | |
| to use physical addresses for DMA, at least until this | |
| option is removed in the 2.6.32 kernel. | |
| config INTEL_IOMMU_FLOPPY_WA | |
| def_bool y | |
| depends on INTEL_IOMMU && X86 | |
| ---help--- | |
| Floppy disk drivers are known to bypass DMA API calls | |
| thereby failing to work when IOMMU is enabled. This | |
| workaround will setup a 1:1 mapping for the first | |
| 16MiB to make floppy (an ISA device) work. | |
| config IRQ_REMAP | |
| bool "Support for Interrupt Remapping" | |
| depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI | |
| select DMAR_TABLE | |
| ---help--- | |
| Supports Interrupt remapping for IO-APIC and MSI devices. | |
| To use x2apic mode in the CPU's which support x2APIC enhancements or | |
| to support platforms with CPU's having > 8 bit APIC ID, say Y. | |
| # OMAP IOMMU support | |
| config OMAP_IOMMU | |
| bool "OMAP IOMMU Support" | |
| depends on ARM && MMU | |
| depends on ARCH_OMAP2PLUS || COMPILE_TEST | |
| select IOMMU_API | |
| ---help--- | |
| The OMAP3 media platform drivers depend on iommu support, | |
| if you need them say Y here. | |
| config OMAP_IOMMU_DEBUG | |
| bool "Export OMAP IOMMU internals in DebugFS" | |
| depends on OMAP_IOMMU && DEBUG_FS | |
| ---help--- | |
| Select this to see extensive information about | |
| the internal state of OMAP IOMMU in debugfs. | |
| Say N unless you know you need this. | |
| config ROCKCHIP_IOMMU | |
| bool "Rockchip IOMMU Support" | |
| depends on ARM | |
| depends on ARCH_ROCKCHIP || COMPILE_TEST | |
| select IOMMU_API | |
| select ARM_DMA_USE_IOMMU | |
| help | |
| Support for IOMMUs found on Rockchip rk32xx SOCs. | |
| These IOMMUs allow virtualization of the address space used by most | |
| cores within the multimedia subsystem. | |
| Say Y here if you are using a Rockchip SoC that includes an IOMMU | |
| device. | |
| config TEGRA_IOMMU_GART | |
| bool "Tegra GART IOMMU Support" | |
| depends on ARCH_TEGRA_2x_SOC | |
| select IOMMU_API | |
| help | |
| Enables support for remapping discontiguous physical memory | |
| shared with the operating system into contiguous I/O virtual | |
| space through the GART (Graphics Address Relocation Table) | |
| hardware included on Tegra SoCs. | |
| config TEGRA_IOMMU_SMMU | |
| bool "NVIDIA Tegra SMMU Support" | |
| depends on ARCH_TEGRA | |
| depends on TEGRA_AHB | |
| depends on TEGRA_MC | |
| select IOMMU_API | |
| help | |
| This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra | |
| SoCs (Tegra30 up to Tegra210). | |
| config EXYNOS_IOMMU | |
| bool "Exynos IOMMU Support" | |
| depends on ARCH_EXYNOS && MMU | |
| select IOMMU_API | |
| select ARM_DMA_USE_IOMMU | |
| help | |
| Support for the IOMMU (System MMU) of Samsung Exynos application | |
| processor family. This enables H/W multimedia accelerators to see | |
| non-linear physical memory chunks as linear memory in their | |
| address space. | |
| If unsure, say N here. | |
| config EXYNOS_IOMMU_DEBUG | |
| bool "Debugging log for Exynos IOMMU" | |
| depends on EXYNOS_IOMMU | |
| help | |
| Select this to see the detailed log message that shows what | |
| happens in the IOMMU driver. | |
| Say N unless you need kernel log message for IOMMU debugging. | |
| config IPMMU_VMSA | |
| bool "Renesas VMSA-compatible IPMMU" | |
| depends on ARM_LPAE | |
| depends on ARCH_RENESAS || COMPILE_TEST | |
| select IOMMU_API | |
| select IOMMU_IO_PGTABLE_LPAE | |
| select ARM_DMA_USE_IOMMU | |
| help | |
| Support for the Renesas VMSA-compatible IPMMU Renesas found in the | |
| R-Mobile APE6 and R-Car H2/M2 SoCs. | |
| If unsure, say N. | |
| config SPAPR_TCE_IOMMU | |
| bool "sPAPR TCE IOMMU Support" | |
| depends on PPC_POWERNV || PPC_PSERIES | |
| select IOMMU_API | |
| help | |
| Enables bits of IOMMU API required by VFIO. The iommu_ops | |
| is not implemented as it is not necessary for VFIO. | |
| # ARM IOMMU support | |
| config ARM_SMMU | |
| bool "ARM Ltd. System MMU (SMMU) Support" | |
| depends on (ARM64 || ARM) && MMU | |
| select IOMMU_API | |
| select IOMMU_IO_PGTABLE_LPAE | |
| select ARM_DMA_USE_IOMMU if ARM | |
| help | |
| Support for implementations of the ARM System MMU architecture | |
| versions 1 and 2. | |
| Say Y here if your SoC includes an IOMMU device implementing | |
| the ARM SMMU architecture. | |
| config ARM_SMMU_V3 | |
| bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" | |
| depends on ARM64 | |
| select IOMMU_API | |
| select IOMMU_IO_PGTABLE_LPAE | |
| select GENERIC_MSI_IRQ_DOMAIN | |
| help | |
| Support for implementations of the ARM System MMU architecture | |
| version 3 providing translation support to a PCIe root complex. | |
| Say Y here if your system includes an IOMMU device implementing | |
| the ARM SMMUv3 architecture. | |
| config S390_IOMMU | |
| def_bool y if S390 && PCI | |
| depends on S390 && PCI | |
| select IOMMU_API | |
| help | |
| Support for the IOMMU API for s390 PCI devices. | |
| config MTK_IOMMU | |
| bool "MTK IOMMU Support" | |
| depends on ARM || ARM64 | |
| depends on ARCH_MEDIATEK || COMPILE_TEST | |
| select ARM_DMA_USE_IOMMU | |
| select IOMMU_API | |
| select IOMMU_DMA | |
| select IOMMU_IO_PGTABLE_ARMV7S | |
| select MEMORY | |
| select MTK_SMI | |
| help | |
| Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia | |
| Memory Management Unit. This option enables remapping of DMA memory | |
| accesses for the multimedia subsystem. | |
| If unsure, say N here. | |
| config MTK_IOMMU_V1 | |
| bool "MTK IOMMU Version 1 (M4U gen1) Support" | |
| depends on ARM | |
| depends on ARCH_MEDIATEK || COMPILE_TEST | |
| select ARM_DMA_USE_IOMMU | |
| select IOMMU_API | |
| select MEMORY | |
| select MTK_SMI | |
| select COMMON_CLK_MT2701_MMSYS | |
| select COMMON_CLK_MT2701_IMGSYS | |
| select COMMON_CLK_MT2701_VDECSYS | |
| help | |
| Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is | |
| Multimedia Memory Managememt Unit. This option enables remapping of | |
| DMA memory accesses for the multimedia subsystem. | |
| if unsure, say N here. | |
| endif # IOMMU_SUPPORT |