# SPDX-License-Identifier: GPL-2.0-only
# The IOVA library may also be used by non-[31mCONFIG_IOMMU_API[0m users
config [31mCONFIG_IOMMU_IOVA[0m
tristate
# [31mCONFIG_IOMMU_API[0m always gets selected by whoever wants it.
config [31mCONFIG_IOMMU_API[0m
bool
menuconfig [31mCONFIG_IOMMU_SUPPORT[0m
bool "IOMMU Hardware Support"
depends on [31mCONFIG_MMU[0m
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 [31mCONFIG_IOMMU_SUPPORT[0m
menu "Generic IOMMU Pagetable Support"
# Selected by the actual pagetable implementations
config [31mCONFIG_IOMMU_IO_PGTABLE[0m
bool
config [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
bool "ARMv7/v8 Long Descriptor Format"
select [31mCONFIG_IOMMU_IO_PGTABLE[0m
depends on [31mCONFIG_ARM[0m || [31mCONFIG_ARM64[0m || ([31mCONFIG_COMPILE_TEST[0m && ![31mCONFIG_GENERIC_ATOMIC64[0m)
help
Enable support for the [31mCONFIG_ARM[0m 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 [31mCONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST[0m
bool "LPAE selftests"
depends on [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
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 [31mCONFIG_IOMMU_IO_PGTABLE_ARMV7S[0m
bool "ARMv7/v8 Short Descriptor Format"
select [31mCONFIG_IOMMU_IO_PGTABLE[0m
depends on [31mCONFIG_ARM[0m || [31mCONFIG_ARM64[0m || [31mCONFIG_COMPILE_TEST[0m
help
Enable support for the [31mCONFIG_ARM[0m 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 [31mCONFIG_IOMMU_IO_PGTABLE_ARMV7S_SELFTEST[0m
bool "ARMv7s selftests"
depends on [31mCONFIG_IOMMU_IO_PGTABLE_ARMV7S[0m
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 [31mCONFIG_IOMMU_DEBUGFS[0m
bool "Export IOMMU internals in DebugFS"
depends on [31mCONFIG_DEBUG_FS[0m
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.
config [31mCONFIG_IOMMU_DEFAULT_PASSTHROUGH[0m
bool "IOMMU passthrough by default"
depends on [31mCONFIG_IOMMU_API[0m
help
Enable passthrough by default, removing the need to pass in
iommu.passthrough=on or iommu=pt through command line. If this
is enabled, you can still disable with iommu.passthrough=off
or iommu=nopt depending on the architecture.
If unsure, say N here.
config [31mCONFIG_OF_IOMMU[0m
def_bool y
depends on [31mCONFIG_OF[0m && [31mCONFIG_IOMMU_API[0m
# IOMMU-agnostic DMA-mapping layer
config [31mCONFIG_IOMMU_DMA[0m
bool
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IOVA[0m
select [31mCONFIG_IRQ_MSI_IOMMU[0m
select [31mCONFIG_NEED_SG_DMA_LENGTH[0m
config [31mCONFIG_FSL_PAMU[0m
bool "Freescale IOMMU support"
depends on [31mCONFIG_PCI[0m
depends on [31mCONFIG_PHYS_64BIT[0m
depends on [31mCONFIG_PPC_E500MC[0m || ([31mCONFIG_COMPILE_TEST[0m && [31mCONFIG_PPC[0m)
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_GENERIC_ALLOCATOR[0m
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 [31mCONFIG_MSM_IOMMU[0m
bool "MSM IOMMU Support"
depends on [31mCONFIG_ARM[0m
depends on [31mCONFIG_ARCH_MSM8X60[0m || [31mCONFIG_ARCH_MSM8960[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_ARMV7S[0m
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 [31mCONFIG_IOMMU_PGTABLES_L2[0m
def_bool y
depends on [31mCONFIG_MSM_IOMMU[0m && [31mCONFIG_MMU[0m && [31mCONFIG_SMP[0m && [31mCONFIG_CPU_DCACHE_DISABLE[0m=n
# AMD IOMMU support
config [31mCONFIG_AMD_IOMMU[0m
bool "AMD IOMMU support"
select [31mCONFIG_SWIOTLB[0m
select [31mCONFIG_PCI_MSI[0m
select [31mCONFIG_PCI_ATS[0m
select [31mCONFIG_PCI_PRI[0m
select [31mCONFIG_PCI_PASID[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IOVA[0m
depends on [31mCONFIG_X86_64[0m && [31mCONFIG_PCI[0m && [31mCONFIG_ACPI[0m
---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 [31mCONFIG_ACPI[0m
table.
config [31mCONFIG_AMD_IOMMU_V2[0m
tristate "AMD IOMMU Version 2 driver"
depends on [31mCONFIG_AMD_IOMMU[0m
select [31mCONFIG_MMU_NOTIFIER[0m
---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 [31mCONFIG_PCI[0m PRI and PASID interface.
config [31mCONFIG_AMD_IOMMU_DEBUGFS[0m
bool "Enable AMD IOMMU internals in DebugFS"
depends on [31mCONFIG_AMD_IOMMU[0m && [31mCONFIG_IOMMU_DEBUGFS[0m
---help---
!!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!!
DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
Exposes AMD IOMMU device internals in DebugFS.
This option is -NOT- intended for production environments, and should
not generally be enabled.
# Intel IOMMU support
config [31mCONFIG_DMAR_TABLE[0m
bool
config [31mCONFIG_INTEL_IOMMU[0m
bool "Support for Intel IOMMU using DMA Remapping Devices"
depends on [31mCONFIG_PCI_MSI[0m && [31mCONFIG_ACPI[0m && ([31mCONFIG_X86[0m || [31mCONFIG_IA64[0m)
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IOVA[0m
select [31mCONFIG_NEED_DMA_MAP_STATE[0m
select [31mCONFIG_DMAR_TABLE[0m
select [31mCONFIG_SWIOTLB[0m
help
DMA remapping (DMAR) devices support enables independent address
translations for Direct Memory Access (DMA) from devices.
These DMA remapping devices are reported via [31mCONFIG_ACPI[0m tables
and include [31mCONFIG_PCI[0m device scope covered by these DMA
remapping devices.
config [31mCONFIG_INTEL_IOMMU_DEBUGFS[0m
bool "Export Intel IOMMU internals in Debugfs"
depends on [31mCONFIG_INTEL_IOMMU[0m && [31mCONFIG_IOMMU_DEBUGFS[0m
help
!!!WARNING!!!
DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!
Expose Intel IOMMU internals in Debugfs.
This option is -NOT- intended for production environments, and should
only be enabled for debugging Intel IOMMU.
config [31mCONFIG_INTEL_IOMMU_SVM[0m
bool "Support for Shared Virtual Memory with Intel IOMMU"
depends on [31mCONFIG_INTEL_IOMMU[0m && [31mCONFIG_X86[0m
select [31mCONFIG_PCI_PASID[0m
select [31mCONFIG_MMU_NOTIFIER[0m
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 [31mCONFIG_INTEL_IOMMU_DEFAULT_ON[0m
def_bool y
prompt "Enable Intel DMA Remapping Devices by default"
depends on [31mCONFIG_INTEL_IOMMU[0m
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 [31mCONFIG_INTEL_IOMMU_BROKEN_GFX_WA[0m
bool "Workaround broken graphics drivers (going away soon)"
depends on [31mCONFIG_INTEL_IOMMU[0m && [31mCONFIG_BROKEN[0m && [31mCONFIG_X86[0m
---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 [31mCONFIG_INTEL_IOMMU_FLOPPY_WA[0m
def_bool y
depends on [31mCONFIG_INTEL_IOMMU[0m && [31mCONFIG_X86[0m
---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 [31mCONFIG_ISA[0m device) work.
config [31mCONFIG_IRQ_REMAP[0m
bool "Support for Interrupt Remapping"
depends on [31mCONFIG_X86_64[0m && [31mCONFIG_X86_IO_APIC[0m && [31mCONFIG_PCI_MSI[0m && [31mCONFIG_ACPI[0m
select [31mCONFIG_DMAR_TABLE[0m
---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 [31mCONFIG_OMAP_IOMMU[0m
bool "OMAP IOMMU Support"
depends on [31mCONFIG_ARM[0m && [31mCONFIG_MMU[0m
depends on [31mCONFIG_ARCH_OMAP2PLUS[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_IOMMU_API[0m
---help---
The OMAP3 media platform drivers depend on iommu support,
if you need them say Y here.
config [31mCONFIG_OMAP_IOMMU_DEBUG[0m
bool "Export OMAP IOMMU internals in DebugFS"
depends on [31mCONFIG_OMAP_IOMMU[0m && [31mCONFIG_DEBUG_FS[0m
---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 [31mCONFIG_ROCKCHIP_IOMMU[0m
bool "Rockchip IOMMU Support"
depends on [31mCONFIG_ARM[0m || [31mCONFIG_ARM64[0m
depends on [31mCONFIG_ARCH_ROCKCHIP[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
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 [31mCONFIG_TEGRA_IOMMU_GART[0m
bool "Tegra GART IOMMU Support"
depends on [31mCONFIG_ARCH_TEGRA_2x_SOC[0m
depends on [31mCONFIG_TEGRA_MC[0m
select [31mCONFIG_IOMMU_API[0m
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 [31mCONFIG_TEGRA_IOMMU_SMMU[0m
bool "NVIDIA Tegra SMMU Support"
depends on [31mCONFIG_ARCH_TEGRA[0m
depends on [31mCONFIG_TEGRA_AHB[0m
depends on [31mCONFIG_TEGRA_MC[0m
select [31mCONFIG_IOMMU_API[0m
help
This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
SoCs (Tegra30 up to Tegra210).
config [31mCONFIG_EXYNOS_IOMMU[0m
bool "Exynos IOMMU Support"
depends on [31mCONFIG_ARCH_EXYNOS[0m && [31mCONFIG_MMU[0m
depends on ![31mCONFIG_CPU_BIG_ENDIAN[0m # revisit driver if we can enable big-endian ptes
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
help
Support for the IOMMU (System [31mCONFIG_MMU[0m) 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 [31mCONFIG_EXYNOS_IOMMU_DEBUG[0m
bool "Debugging log for Exynos IOMMU"
depends on [31mCONFIG_EXYNOS_IOMMU[0m
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 [31mCONFIG_IPMMU_VMSA[0m
bool "Renesas VMSA-compatible IPMMU"
depends on [31mCONFIG_ARM[0m || [31mCONFIG_IOMMU_DMA[0m
depends on [31mCONFIG_ARCH_RENESAS[0m || ([31mCONFIG_COMPILE_TEST[0m && ![31mCONFIG_GENERIC_ATOMIC64[0m)
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
help
Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
APE6, R-Car Gen2, and R-Car Gen3 SoCs.
If unsure, say N.
config [31mCONFIG_SPAPR_TCE_IOMMU[0m
bool "sPAPR TCE IOMMU Support"
depends on [31mCONFIG_PPC_POWERNV[0m || [31mCONFIG_PPC_PSERIES[0m
select [31mCONFIG_IOMMU_API[0m
help
Enables bits of IOMMU API required by [31mCONFIG_VFIO[0m. The iommu_ops
is not implemented as it is not necessary for [31mCONFIG_VFIO[0m.
# [31mCONFIG_ARM[0m IOMMU support
config [31mCONFIG_ARM_SMMU[0m
bool "ARM Ltd. System MMU (SMMU) Support"
depends on ([31mCONFIG_ARM64[0m || [31mCONFIG_ARM[0m) && [31mCONFIG_MMU[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m if [31mCONFIG_ARM[0m
help
Support for implementations of the [31mCONFIG_ARM[0m System [31mCONFIG_MMU[0m architecture
versions 1 and 2.
Say Y here if your SoC includes an IOMMU device implementing
the [31mCONFIG_ARM[0m SMMU architecture.
config [31mCONFIG_ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT[0m
bool "Default to disabling bypass on ARM SMMU v1 and v2"
depends on [31mCONFIG_ARM_SMMU[0m
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 [31mCONFIG_ARM_SMMU_V3[0m
bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
depends on [31mCONFIG_ARM64[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
select [31mCONFIG_GENERIC_MSI_IRQ_DOMAIN[0m
help
Support for implementations of the [31mCONFIG_ARM[0m System [31mCONFIG_MMU[0m architecture
version 3 providing translation support to a PCIe root complex.
Say Y here if your system includes an IOMMU device implementing
the [31mCONFIG_ARM[0m SMMUv3 architecture.
config [31mCONFIG_S390_IOMMU[0m
def_bool y if [31mCONFIG_S390[0m && [31mCONFIG_PCI[0m
depends on [31mCONFIG_S390[0m && [31mCONFIG_PCI[0m
select [31mCONFIG_IOMMU_API[0m
help
Support for the IOMMU API for s390 [31mCONFIG_PCI[0m devices.
config [31mCONFIG_S390_CCW_IOMMU[0m
bool "S390 CCW IOMMU Support"
depends on [31mCONFIG_S390[0m && [31mCONFIG_CCW[0m
select [31mCONFIG_IOMMU_API[0m
help
Enables bits of IOMMU API required by [31mCONFIG_VFIO[0m. The iommu_ops
is not implemented as it is not necessary for [31mCONFIG_VFIO[0m.
config [31mCONFIG_S390_AP_IOMMU[0m
bool "S390 AP IOMMU Support"
depends on [31mCONFIG_S390[0m && [31mCONFIG_ZCRYPT[0m
select [31mCONFIG_IOMMU_API[0m
help
Enables bits of IOMMU API required by [31mCONFIG_VFIO[0m. The iommu_ops
is not implemented as it is not necessary for [31mCONFIG_VFIO[0m.
config [31mCONFIG_MTK_IOMMU[0m
bool "MTK IOMMU Support"
depends on [31mCONFIG_ARM[0m || [31mCONFIG_ARM64[0m
depends on [31mCONFIG_ARCH_MEDIATEK[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_DMA[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_ARMV7S[0m
select [31mCONFIG_MEMORY[0m
select [31mCONFIG_MTK_SMI[0m
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 [31mCONFIG_MTK_IOMMU_V1[0m
bool "MTK IOMMU Version 1 (M4U gen1) Support"
depends on [31mCONFIG_ARM[0m
depends on [31mCONFIG_ARCH_MEDIATEK[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_MEMORY[0m
select [31mCONFIG_MTK_SMI[0m
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 [31mCONFIG_QCOM_IOMMU[0m
# Note: iommu drivers cannot (yet?) be built as modules
bool "Qualcomm IOMMU Support"
depends on [31mCONFIG_ARCH_QCOM[0m || ([31mCONFIG_COMPILE_TEST[0m && ![31mCONFIG_GENERIC_ATOMIC64[0m)
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_IOMMU_IO_PGTABLE_LPAE[0m
select [31mCONFIG_ARM_DMA_USE_IOMMU[0m
help
Support for IOMMU on certain Qualcomm SoCs.
config [31mCONFIG_HYPERV_IOMMU[0m
bool "Hyper-V x2APIC IRQ Handling"
depends on [31mCONFIG_HYPERV[0m
select [31mCONFIG_IOMMU_API[0m
default [31mCONFIG_HYPERV[0m
help
Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
guests to run with x2APIC mode enabled.
config [31mCONFIG_VIRTIO_IOMMU[0m
bool "Virtio IOMMU driver"
depends on [31mCONFIG_VIRTIO[0m=y
depends on [31mCONFIG_ARM64[0m
select [31mCONFIG_IOMMU_API[0m
select [31mCONFIG_INTERVAL_TREE[0m
help
Para-virtualised IOMMU driver with virtio.
Say Y here if you intend to run this kernel as a guest.
endif # [31mCONFIG_IOMMU_SUPPORT[0m