diff options
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig new file mode 100644 index 000000000..6e07bd694 --- /dev/null +++ b/drivers/iommu/Kconfig @@ -0,0 +1,410 @@ +# SPDX-License-Identifier: GPL-2.0-only +# The IOVA library may also be used by non-IOMMU_API users +config IOMMU_IOVA + tristate + +# IOMMU_API always gets selected by whoever wants it. +config IOMMU_API + bool + +config IOMMUFD_DRIVER + bool + default n + +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 cmpxchg64() + 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_KUNIT_TEST + tristate "KUnit tests for LPAE" + depends on IOMMU_IO_PGTABLE_LPAE && KUNIT + default KUNIT_ALL_TESTS + help + Enable kunit tests for LPAE page table allocator. This performs + a series of page-table consistency checks. + + 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 cmpxchg64() + 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 || S390 + 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 || X86 || S390 + select DMA_OPS_HELPERS + select IOMMU_API + select IOMMU_IOVA + select NEED_SG_DMA_LENGTH + select NEED_SG_DMA_FLAGS if SWIOTLB + +# Shared Virtual Addressing +config IOMMU_SVA + select IOMMU_MM_DATA + bool + +config IOMMU_IOPF + bool + +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_QCOM || 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/arm/Kconfig" +source "drivers/iommu/intel/Kconfig" +source "drivers/iommu/iommufd/Kconfig" +source "drivers/iommu/riscv/Kconfig" + +config IRQ_REMAP + bool "Support for Interrupt Remapping" + depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI + select IRQ_MSI_LIB + 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_SMMU + bool "NVIDIA Tegra SMMU Support" + depends on ARCH_TEGRA || COMPILE_TEST + 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 ARM || ARM64 || 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 + 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. + +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 + 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 (ARCH_MEDIATEK && ARM) || 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 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. + +config VSI_IOMMU + tristate "Verisilicon IOMMU Support" + depends on (ARCH_ROCKCHIP && ARM64) || COMPILE_TEST + select IOMMU_API + help + Support for IOMMUs used by Verisilicon sub-systems like video + decoders or encoder hardware blocks. + + Say Y here if you want to use this IOMMU in front of these + hardware blocks. + +config IOMMU_DEBUG_PAGEALLOC + bool "Debug IOMMU mappings against page allocations" + depends on DEBUG_PAGEALLOC && IOMMU_API && PAGE_EXTENSION + help + This enables a consistency check between the kernel page allocator and + the IOMMU subsystem. It verifies that pages being allocated or freed + are not currently mapped in any IOMMU domain. + + This helps detect DMA use-after-free bugs where a driver frees a page + but forgets to unmap it from the IOMMU, potentially allowing a device + to overwrite memory that the kernel has repurposed. + + These checks are best-effort and may not detect all problems. + + Due to performance overhead, this feature is disabled by default. + You must enable "iommu.debug_pagealloc" from the kernel command + line to activate the runtime checks. + + If unsure, say N. +endif # IOMMU_SUPPORT + +source "drivers/iommu/generic_pt/Kconfig" |