482 lines
14 KiB
Plaintext
482 lines
14 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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# The IOVA library may also be used by non-IOMMU_API users
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config IOMMU_IOVA
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tristate
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# The IOASID library may also be used by non-IOMMU_API users
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config IOASID
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tristate
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config IOASID_USER
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tristate
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depends on IOASID
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default n
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# IOMMU_API always gets selected by whoever wants it.
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config IOMMU_API
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bool
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menuconfig IOMMU_SUPPORT
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bool "IOMMU Hardware Support"
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depends on MMU
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default y
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---help---
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Say Y here if you want to compile device drivers for IO Memory
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Management Units into the kernel. These devices usually allow to
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remap DMA requests and/or remap interrupts from other devices on the
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system.
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if IOMMU_SUPPORT
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menu "Generic IOMMU Pagetable Support"
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# Selected by the actual pagetable implementations
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config IOMMU_IO_PGTABLE
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bool
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config IOMMU_IO_PGTABLE_LPAE
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bool "ARMv7/v8 Long Descriptor Format"
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select IOMMU_IO_PGTABLE
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depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
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help
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Enable support for the ARM long descriptor pagetable format.
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This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
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sizes at both stage-1 and stage-2, as well as address spaces
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up to 48-bits in size.
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config IOMMU_IO_PGTABLE_LPAE_SELFTEST
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bool "LPAE selftests"
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depends on IOMMU_IO_PGTABLE_LPAE
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help
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Enable self-tests for LPAE page table allocator. This performs
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a series of page-table consistency checks during boot.
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If unsure, say N here.
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config IOMMU_IO_PGTABLE_ARMV7S
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bool "ARMv7/v8 Short Descriptor Format"
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select IOMMU_IO_PGTABLE
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depends on ARM || ARM64 || COMPILE_TEST
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help
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Enable support for the ARM Short-descriptor pagetable format.
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This supports 32-bit virtual and physical addresses mapped using
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2-level tables with 4KB pages/1MB sections, and contiguous entries
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for 64KB pages/16MB supersections if indicated by the IOMMU driver.
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config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
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bool "ARMv7s selftests"
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depends on IOMMU_IO_PGTABLE_ARMV7S
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help
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Enable self-tests for ARMv7s page table allocator. This performs
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a series of page-table consistency checks during boot.
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If unsure, say N here.
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endmenu
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config IOMMU_DEBUGFS
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bool "Export IOMMU internals in DebugFS"
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depends on DEBUG_FS
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help
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Allows exposure of IOMMU device internals. This option enables
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the use of debugfs by IOMMU drivers as required. Devices can,
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at initialization time, cause the IOMMU code to create a top-level
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debug/iommu directory, and then populate a subdirectory with
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entries as required.
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choice
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prompt "IOMMU default domain type"
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depends on IOMMU_API
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default IOMMU_DEFAULT_DMA_LAZY if AMD_IOMMU || INTEL_IOMMU
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default IOMMU_DEFAULT_DMA_STRICT
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help
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Choose the type of IOMMU domain used to manage DMA API usage by
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device drivers. The options here typically represent different
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levels of tradeoff between robustness/security and performance,
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depending on the IOMMU driver. Not all IOMMUs support all options.
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This choice can be overridden at boot via the command line, and for
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some devices also at runtime via sysfs.
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If unsure, keep the default.
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config IOMMU_DEFAULT_DMA_STRICT
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bool "Translated - Strict"
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help
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Trusted devices use translation to restrict their access to only
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DMA-mapped pages, with strict TLB invalidation on unmap. Equivalent
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to passing "iommu.passthrough=0 iommu.strict=1" on the command line.
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Untrusted devices always use this mode, with an additional layer of
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bounce-buffering such that they cannot gain access to any unrelated
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data within a mapped page.
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config IOMMU_DEFAULT_DMA_LAZY
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bool "Translated - Lazy"
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help
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Trusted devices use translation to restrict their access to only
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DMA-mapped pages, but with "lazy" batched TLB invalidation. This
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mode allows higher performance with some IOMMUs due to reduced TLB
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flushing, but at the cost of reduced isolation since devices may be
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able to access memory for some time after it has been unmapped.
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Equivalent to passing "iommu.passthrough=0 iommu.strict=0" on the
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command line.
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If this mode is not supported by the IOMMU driver, the effective
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runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT.
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config IOMMU_DEFAULT_PASSTHROUGH
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bool "Passthrough"
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help
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Trusted devices are identity-mapped, giving them unrestricted access
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to memory with minimal performance overhead. Equivalent to passing
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"iommu.passthrough=1" (historically "iommu=pt") on the command line.
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If this mode is not supported by the IOMMU driver, the effective
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runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT.
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endchoice
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config OF_IOMMU
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def_bool y
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depends on OF && IOMMU_API
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# IOMMU-agnostic DMA-mapping layer
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config IOMMU_DMA
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bool
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select IOMMU_API
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select IOMMU_IOVA
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select IRQ_MSI_IOMMU
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select NEED_SG_DMA_LENGTH
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# Shared Virtual Addressing
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config IOMMU_SVA
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bool
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select IOASID
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config FSL_PAMU
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bool "Freescale IOMMU support"
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depends on PCI
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depends on PHYS_64BIT
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depends on PPC_E500MC || (COMPILE_TEST && PPC)
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select IOMMU_API
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select GENERIC_ALLOCATOR
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help
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Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
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PAMU can authorize memory access, remap the memory address, and remap I/O
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transaction types.
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# MSM IOMMU support
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config MSM_IOMMU
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bool "MSM IOMMU Support"
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depends on ARM
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depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
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select IOMMU_API
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select IOMMU_IO_PGTABLE_ARMV7S
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help
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Support for the IOMMUs found on certain Qualcomm SOCs.
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These IOMMUs allow virtualization of the address space used by most
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cores within the multimedia subsystem.
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If unsure, say N here.
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config IOMMU_PGTABLES_L2
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def_bool y
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depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
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# AMD IOMMU support
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config AMD_IOMMU
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bool "AMD IOMMU support"
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select SWIOTLB
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select PCI_MSI
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select PCI_ATS
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select PCI_PRI
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select PCI_PASID
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select IOMMU_API
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select IOMMU_IOVA
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select IOMMU_DMA
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depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
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---help---
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With this option you can enable support for AMD IOMMU hardware in
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your system. An IOMMU is a hardware component which provides
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remapping of DMA memory accesses from devices. With an AMD IOMMU you
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can isolate the DMA memory of different devices and protect the
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system from misbehaving device drivers or hardware.
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You can find out if your system has an AMD IOMMU if you look into
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your BIOS for an option to enable it or if you have an IVRS ACPI
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table.
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config AMD_IOMMU_V2
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tristate "AMD IOMMU Version 2 driver"
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depends on AMD_IOMMU
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select MMU_NOTIFIER
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---help---
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This option enables support for the AMD IOMMUv2 features of the IOMMU
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hardware. Select this option if you want to use devices that support
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the PCI PRI and PASID interface.
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config AMD_IOMMU_DEBUGFS
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bool "Enable AMD IOMMU internals in DebugFS"
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depends on AMD_IOMMU && IOMMU_DEBUGFS
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---help---
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!!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!!
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DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
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Exposes AMD IOMMU device internals in DebugFS.
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This option is -NOT- intended for production environments, and should
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not generally be enabled.
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source "drivers/iommu/intel/Kconfig"
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config IRQ_REMAP
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bool "Support for Interrupt Remapping"
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depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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select DMAR_TABLE
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---help---
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Supports Interrupt remapping for IO-APIC and MSI devices.
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To use x2apic mode in the CPU's which support x2APIC enhancements or
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to support platforms with CPU's having > 8 bit APIC ID, say Y.
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# OMAP IOMMU support
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config OMAP_IOMMU
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bool "OMAP IOMMU Support"
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depends on ARM && MMU
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depends on ARCH_OMAP2PLUS || COMPILE_TEST
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select IOMMU_API
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---help---
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The OMAP3 media platform drivers depend on iommu support,
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if you need them say Y here.
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config OMAP_IOMMU_DEBUG
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bool "Export OMAP IOMMU internals in DebugFS"
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depends on OMAP_IOMMU && DEBUG_FS
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---help---
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Select this to see extensive information about
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the internal state of OMAP IOMMU in debugfs.
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Say N unless you know you need this.
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config ROCKCHIP_IOMMU
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bool "Rockchip IOMMU Support"
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depends on ARM || ARM64
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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select IOMMU_API
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select ARM_DMA_USE_IOMMU
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help
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Support for IOMMUs found on Rockchip rk32xx SOCs.
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These IOMMUs allow virtualization of the address space used by most
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cores within the multimedia subsystem.
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Say Y here if you are using a Rockchip SoC that includes an IOMMU
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device.
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config TEGRA_IOMMU_GART
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bool "Tegra GART IOMMU Support"
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depends on ARCH_TEGRA_2x_SOC
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depends on TEGRA_MC
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select IOMMU_API
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help
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Enables support for remapping discontiguous physical memory
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shared with the operating system into contiguous I/O virtual
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space through the GART (Graphics Address Relocation Table)
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hardware included on Tegra SoCs.
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config TEGRA_IOMMU_SMMU
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bool "NVIDIA Tegra SMMU Support"
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depends on ARCH_TEGRA
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depends on TEGRA_AHB
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depends on TEGRA_MC
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select IOMMU_API
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help
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This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
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SoCs (Tegra30 up to Tegra210).
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config EXYNOS_IOMMU
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bool "Exynos IOMMU Support"
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depends on ARCH_EXYNOS && MMU
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depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
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select IOMMU_API
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select ARM_DMA_USE_IOMMU
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help
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Support for the IOMMU (System MMU) of Samsung Exynos application
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processor family. This enables H/W multimedia accelerators to see
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non-linear physical memory chunks as linear memory in their
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address space.
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If unsure, say N here.
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config EXYNOS_IOMMU_DEBUG
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bool "Debugging log for Exynos IOMMU"
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depends on EXYNOS_IOMMU
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help
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Select this to see the detailed log message that shows what
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happens in the IOMMU driver.
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Say N unless you need kernel log message for IOMMU debugging.
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config IPMMU_VMSA
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bool "Renesas VMSA-compatible IPMMU"
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depends on ARM || IOMMU_DMA
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depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select ARM_DMA_USE_IOMMU
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help
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Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
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APE6, R-Car Gen2, and R-Car Gen3 SoCs.
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If unsure, say N.
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config SPAPR_TCE_IOMMU
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bool "sPAPR TCE IOMMU Support"
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depends on PPC_POWERNV || PPC_PSERIES
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select IOMMU_API
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help
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Enables bits of IOMMU API required by VFIO. The iommu_ops
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is not implemented as it is not necessary for VFIO.
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# ARM IOMMU support
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config ARM_SMMU
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bool "ARM Ltd. System MMU (SMMU) Support"
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depends on (ARM64 || ARM) && MMU
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select ARM_DMA_USE_IOMMU if ARM
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help
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Support for implementations of the ARM System MMU architecture
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versions 1 and 2.
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Say Y here if your SoC includes an IOMMU device implementing
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the ARM SMMU architecture.
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config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
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bool "Default to disabling bypass on ARM SMMU v1 and v2"
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depends on ARM_SMMU
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default y
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help
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Say Y here to (by default) disable bypass streams such that
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incoming transactions from devices that are not attached to
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an iommu domain will report an abort back to the device and
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will not be allowed to pass through the SMMU.
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Any old kernels that existed before this KConfig was
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introduced would default to _allowing_ bypass (AKA the
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equivalent of NO for this config). However the default for
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this option is YES because the old behavior is insecure.
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There are few reasons to allow unmatched stream bypass, and
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even fewer good ones. If saying YES here breaks your board
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you should work on fixing your board. This KConfig option
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is expected to be removed in the future and we'll simply
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hardcode the bypass disable in the code.
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NOTE: the kernel command line parameter
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'arm-smmu.disable_bypass' will continue to override this
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config.
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config ARM_SMMU_V3
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bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
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depends on ARM64
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select GENERIC_MSI_IRQ_DOMAIN
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help
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Support for implementations of the ARM System MMU architecture
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version 3 providing translation support to a PCIe root complex.
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Say Y here if your system includes an IOMMU device implementing
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the ARM SMMUv3 architecture.
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config S390_IOMMU
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def_bool y if S390 && PCI
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depends on S390 && PCI
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select IOMMU_API
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help
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Support for the IOMMU API for s390 PCI devices.
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config S390_CCW_IOMMU
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bool "S390 CCW IOMMU Support"
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depends on S390 && CCW
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select IOMMU_API
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help
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Enables bits of IOMMU API required by VFIO. The iommu_ops
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is not implemented as it is not necessary for VFIO.
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config S390_AP_IOMMU
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bool "S390 AP IOMMU Support"
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depends on S390 && ZCRYPT
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select IOMMU_API
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help
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Enables bits of IOMMU API required by VFIO. The iommu_ops
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is not implemented as it is not necessary for VFIO.
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config MTK_IOMMU
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bool "MTK IOMMU Support"
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depends on ARM || ARM64
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depends on ARCH_MEDIATEK || COMPILE_TEST
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select ARM_DMA_USE_IOMMU
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select IOMMU_API
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select IOMMU_DMA
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select IOMMU_IO_PGTABLE_ARMV7S
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select MEMORY
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select MTK_SMI
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help
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Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
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Memory Management Unit. This option enables remapping of DMA memory
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accesses for the multimedia subsystem.
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If unsure, say N here.
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config MTK_IOMMU_V1
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bool "MTK IOMMU Version 1 (M4U gen1) Support"
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depends on ARM
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depends on ARCH_MEDIATEK || COMPILE_TEST
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select ARM_DMA_USE_IOMMU
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select IOMMU_API
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select MEMORY
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select MTK_SMI
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help
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Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
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Multimedia Memory Managememt Unit. This option enables remapping of
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DMA memory accesses for the multimedia subsystem.
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if unsure, say N here.
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config QCOM_IOMMU
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# Note: iommu drivers cannot (yet?) be built as modules
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bool "Qualcomm IOMMU Support"
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depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select ARM_DMA_USE_IOMMU
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help
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Support for IOMMU on certain Qualcomm SoCs.
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config HYPERV_IOMMU
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bool "Hyper-V x2APIC IRQ Handling"
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depends on HYPERV
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select IOMMU_API
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default HYPERV
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help
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Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
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guests to run with x2APIC mode enabled.
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config VIRTIO_IOMMU
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bool "Virtio IOMMU driver"
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depends on VIRTIO=y
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depends on ARM64
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select IOMMU_API
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select INTERVAL_TREE
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help
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Para-virtualised IOMMU driver with virtio.
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Say Y here if you intend to run this kernel as a guest.
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config SMMU_BYPASS_DEV
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bool "SMMU bypass streams for some specific devices"
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help
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according smmu.bypassdev cmdline, SMMU performs attribute
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transformation only,with no address translation.
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endif # IOMMU_SUPPORT
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