# IOMMU_API always gets selected by whoever wants it.
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
Enable self-tests for ARMv7s page table allocator. This performs
|
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_FAST
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bool "Fast ARMv7/v8 Long Descriptor Format"
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depends on ARM64_DMA_USE_IOMMU && IOMMU_DMA
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help
|
Enable support for a subset of the ARM long descriptor pagetable
|
format. This allocator achieves fast performance by
|
pre-allocating and pre-populating page table memory up front.
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only supports a 32 bit virtual address space.
|
|
This implementation is mainly optimized for use cases where the
|
buffers are small (<= 64K) since it only supports 4K page sizes.
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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
|
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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config IOMMU_DEFAULT_PASSTHROUGH
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bool "IOMMU passthrough by default"
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depends on IOMMU_API
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help
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Enable passthrough by default, removing the need to pass in
|
iommu.passthrough=on or iommu=pt through command line. If this
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is enabled, you can still disable with iommu.passthrough=off
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or iommu=nopt depending on the architecture.
|
|
If unsure, say N here.
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config IOMMU_IOVA
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tristate
|
|
config OF_IOMMU
|
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 NEED_SG_DMA_LENGTH
|
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config FSL_PAMU
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bool "Freescale IOMMU support"
|
depends on PCI
|
depends on PHYS_64BIT
|
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
|
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
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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
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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.
|
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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.
|
|
config AMD_IOMMU_DEBUGFS
|
bool "Enable AMD IOMMU internals in DebugFS"
|
depends on AMD_IOMMU && IOMMU_DEBUGFS
|
---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 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
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select NEED_DMA_MAP_STATE
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select DMAR_TABLE
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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
|
tristate "Rockchip IOMMU Support"
|
depends on ARM || ARM64
|
depends on ARCH_ROCKCHIP || COMPILE_TEST
|
select IOMMU_API
|
select ARM_DMA_USE_IOMMU if ARM
|
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
|
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 ARM || IOMMU_DMA
|
depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
|
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 Gen2, and R-Car Gen3 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
|
tristate "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
|
select ARM64_DMA_USE_IOMMU if ARM64
|
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 S390_CCW_IOMMU
|
bool "S390 CCW IOMMU Support"
|
depends on S390 && CCW
|
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
|
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
|
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 && !GENERIC_ATOMIC64)
|
select IOMMU_API
|
select IOMMU_IO_PGTABLE_LPAE
|
select ARM_DMA_USE_IOMMU
|
help
|
Support for IOMMU on certain Qualcomm SoCs.
|
|
endif # IOMMU_SUPPORT
|
