| # SPDX-License-Identifier: GPL-2.0-only |
| # The IOVA library may also be used by non-IOMMU_API users |
| config IOMMU_IOVA |
| tristate |
| |
| # The IOASID library may also be used by non-IOMMU_API users |
| config IOASID |
| tristate |
| |
| # 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 ARM || ARM64 || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for cpmxchg64() |
| 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 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. |
| |
| config IOMMU_IO_PGTABLE_DART |
| bool "Apple DART Formats" |
| select IOMMU_IO_PGTABLE |
| depends on ARM64 || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for cpmxchg64() |
| help |
| Enable support for the Apple DART pagetable formats. These include |
| the t8020 and t6000/t8110 DART formats used in Apple M1/M2 family |
| SoCs. |
| |
| If unsure, say N here. |
| |
| endmenu |
| |
| config IOMMU_DEBUGFS |
| bool "Export IOMMU internals in DebugFS" |
| depends on DEBUG_FS |
| help |
| Allows exposure of IOMMU device internals. This option enables |
| the use of debugfs by IOMMU drivers as required. Devices can, |
| at initialization time, cause the IOMMU code to create a top-level |
| debug/iommu directory, and then populate a subdirectory with |
| entries as required. |
| |
| choice |
| prompt "IOMMU default domain type" |
| depends on IOMMU_API |
| default IOMMU_DEFAULT_DMA_LAZY if X86 || IA64 |
| default IOMMU_DEFAULT_DMA_STRICT |
| help |
| Choose the type of IOMMU domain used to manage DMA API usage by |
| device drivers. The options here typically represent different |
| levels of tradeoff between robustness/security and performance, |
| depending on the IOMMU driver. Not all IOMMUs support all options. |
| This choice can be overridden at boot via the command line, and for |
| some devices also at runtime via sysfs. |
| |
| If unsure, keep the default. |
| |
| config IOMMU_DEFAULT_DMA_STRICT |
| bool "Translated - Strict" |
| help |
| Trusted devices use translation to restrict their access to only |
| DMA-mapped pages, with strict TLB invalidation on unmap. Equivalent |
| to passing "iommu.passthrough=0 iommu.strict=1" on the command line. |
| |
| Untrusted devices always use this mode, with an additional layer of |
| bounce-buffering such that they cannot gain access to any unrelated |
| data within a mapped page. |
| |
| config IOMMU_DEFAULT_DMA_LAZY |
| bool "Translated - Lazy" |
| help |
| Trusted devices use translation to restrict their access to only |
| DMA-mapped pages, but with "lazy" batched TLB invalidation. This |
| mode allows higher performance with some IOMMUs due to reduced TLB |
| flushing, but at the cost of reduced isolation since devices may be |
| able to access memory for some time after it has been unmapped. |
| Equivalent to passing "iommu.passthrough=0 iommu.strict=0" on the |
| command line. |
| |
| If this mode is not supported by the IOMMU driver, the effective |
| runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT. |
| |
| config IOMMU_DEFAULT_PASSTHROUGH |
| bool "Passthrough" |
| help |
| Trusted devices are identity-mapped, giving them unrestricted access |
| to memory with minimal performance overhead. Equivalent to passing |
| "iommu.passthrough=1" (historically "iommu=pt") on the command line. |
| |
| If this mode is not supported by the IOMMU driver, the effective |
| runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT. |
| |
| endchoice |
| |
| config OF_IOMMU |
| def_bool y |
| depends on OF && IOMMU_API |
| |
| # IOMMU-agnostic DMA-mapping layer |
| config IOMMU_DMA |
| def_bool ARM64 || IA64 || X86 |
| select DMA_OPS |
| select IOMMU_API |
| select IOMMU_IOVA |
| select IRQ_MSI_IOMMU |
| select NEED_SG_DMA_LENGTH |
| |
| # Shared Virtual Addressing |
| config IOMMU_SVA |
| bool |
| select IOASID |
| |
| config FSL_PAMU |
| bool "Freescale IOMMU support" |
| depends on PCI |
| depends on PHYS_64BIT |
| 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. |
| |
| source "drivers/iommu/amd/Kconfig" |
| source "drivers/iommu/intel/Kconfig" |
| source "drivers/iommu/iommufd/Kconfig" |
| |
| 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 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 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 SUN50I_IOMMU |
| bool "Allwinner H6 IOMMU Support" |
| depends on HAS_DMA |
| depends on ARCH_SUNXI || COMPILE_TEST |
| select ARM_DMA_USE_IOMMU |
| select IOMMU_API |
| help |
| Support for the IOMMU introduced in the Allwinner H6 SoCs. |
| |
| config TEGRA_IOMMU_GART |
| bool "Tegra GART IOMMU Support" |
| depends on ARCH_TEGRA_2x_SOC |
| depends on TEGRA_MC |
| 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 || COMPILE_TEST |
| depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes |
| 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 ARCH_RENESAS || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE |
| select IOMMU_API |
| select IOMMU_IO_PGTABLE_LPAE |
| select ARM_DMA_USE_IOMMU |
| help |
| Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile |
| APE6, R-Car Gen{2,3} and RZ/G{1,2} 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. |
| |
| config APPLE_DART |
| tristate "Apple DART IOMMU Support" |
| depends on ARCH_APPLE || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_DART |
| select IOMMU_API |
| select IOMMU_IO_PGTABLE_DART |
| default ARCH_APPLE |
| help |
| Support for Apple DART (Device Address Resolution Table) IOMMUs |
| found in Apple ARM SoCs like the M1. |
| This IOMMU is required for most peripherals using DMA to access |
| the main memory. |
| |
| Say Y here if you are using an Apple SoC. |
| |
| # ARM IOMMU support |
| config ARM_SMMU |
| tristate "ARM Ltd. System MMU (SMMU) Support" |
| depends on ARM64 || ARM || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE |
| 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_LEGACY_DT_BINDINGS |
| bool "Support the legacy \"mmu-masters\" devicetree bindings" |
| depends on ARM_SMMU=y && OF |
| help |
| Support for the badly designed and deprecated "mmu-masters" |
| devicetree bindings. This allows some DMA masters to attach |
| to the SMMU but does not provide any support via the DMA API. |
| If you're lucky, you might be able to get VFIO up and running. |
| |
| If you say Y here then you'll make me very sad. Instead, say N |
| and move your firmware to the utopian future that was 2016. |
| |
| config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT |
| bool "Default to disabling bypass on ARM SMMU v1 and v2" |
| depends on ARM_SMMU |
| default y |
| help |
| Say Y here to (by default) disable bypass streams such that |
| incoming transactions from devices that are not attached to |
| an iommu domain will report an abort back to the device and |
| will not be allowed to pass through the SMMU. |
| |
| Any old kernels that existed before this KConfig was |
| introduced would default to _allowing_ bypass (AKA the |
| equivalent of NO for this config). However the default for |
| this option is YES because the old behavior is insecure. |
| |
| There are few reasons to allow unmatched stream bypass, and |
| even fewer good ones. If saying YES here breaks your board |
| you should work on fixing your board. This KConfig option |
| is expected to be removed in the future and we'll simply |
| hardcode the bypass disable in the code. |
| |
| NOTE: the kernel command line parameter |
| 'arm-smmu.disable_bypass' will continue to override this |
| config. |
| |
| config ARM_SMMU_QCOM |
| def_tristate y |
| depends on ARM_SMMU && ARCH_QCOM |
| select QCOM_SCM |
| help |
| When running on a Qualcomm platform that has the custom variant |
| of the ARM SMMU, this needs to be built into the SMMU driver. |
| |
| config ARM_SMMU_QCOM_DEBUG |
| bool "ARM SMMU QCOM implementation defined debug support" |
| depends on ARM_SMMU_QCOM |
| help |
| Support for implementation specific debug features in ARM SMMU |
| hardware found in QTI platforms. |
| |
| Say Y here to enable debug for issues such as TLB sync timeouts |
| which requires implementation defined register dumps. |
| |
| config ARM_SMMU_V3 |
| tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support" |
| depends on ARM64 |
| select IOMMU_API |
| select IOMMU_IO_PGTABLE_LPAE |
| select GENERIC_MSI_IRQ |
| 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 ARM_SMMU_V3_SVA |
| bool "Shared Virtual Addressing support for the ARM SMMUv3" |
| depends on ARM_SMMU_V3 |
| select IOMMU_SVA |
| select MMU_NOTIFIER |
| help |
| Support for sharing process address spaces with devices using the |
| SMMUv3. |
| |
| Say Y here if your system supports SVA extensions such as PCIe PASID |
| and PRI. |
| |
| 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 S390_CCW_IOMMU |
| bool "S390 CCW IOMMU Support" |
| depends on S390 && CCW || COMPILE_TEST |
| 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. |
| |
| config S390_AP_IOMMU |
| bool "S390 AP IOMMU Support" |
| depends on S390 && ZCRYPT || COMPILE_TEST |
| 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. |
| |
| config MTK_IOMMU |
| tristate "MediaTek IOMMU Support" |
| depends on ARCH_MEDIATEK || COMPILE_TEST |
| select ARM_DMA_USE_IOMMU |
| select IOMMU_API |
| 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 |
| tristate "MediaTek 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 |
| 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. |
| |
| config QCOM_IOMMU |
| # Note: iommu drivers cannot (yet?) be built as modules |
| bool "Qualcomm IOMMU Support" |
| depends on ARCH_QCOM || COMPILE_TEST |
| depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE |
| select QCOM_SCM |
| select IOMMU_API |
| select IOMMU_IO_PGTABLE_LPAE |
| select ARM_DMA_USE_IOMMU |
| help |
| Support for IOMMU on certain Qualcomm SoCs. |
| |
| config HYPERV_IOMMU |
| bool "Hyper-V IRQ Handling" |
| depends on HYPERV && X86 |
| select IOMMU_API |
| default HYPERV |
| help |
| Stub IOMMU driver to handle IRQs to support Hyper-V Linux |
| guest and root partitions. |
| |
| config VIRTIO_IOMMU |
| tristate "Virtio IOMMU driver" |
| depends on VIRTIO |
| depends on (ARM64 || X86) |
| select IOMMU_API |
| select INTERVAL_TREE |
| select ACPI_VIOT if ACPI |
| help |
| Para-virtualised IOMMU driver with virtio. |
| |
| Say Y here if you intend to run this kernel as a guest. |
| |
| config SPRD_IOMMU |
| tristate "Unisoc IOMMU Support" |
| depends on ARCH_SPRD || COMPILE_TEST |
| select IOMMU_API |
| help |
| Support for IOMMU on Unisoc's SoCs, this IOMMU can be used by |
| Unisoc's multimedia devices, such as display, Image codec(jpeg) |
| and a few signal processors, including VSP(video), GSP(graphic), |
| ISP(image), and CPP(camera pixel processor), etc. |
| |
| Say Y here if you want to use the multimedia devices listed above. |
| |
| endif # IOMMU_SUPPORT |
