| # IOMMU_API always gets selected by whoever wants it. |
| config IOMMU_API |
| bool |
| |
| menuconfig IOMMU_SUPPORT |
| bool "IOMMU Hardware Support" |
| 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 |
| |
| config OF_IOMMU |
| def_bool y |
| depends on OF |
| |
| config FSL_PAMU |
| bool "Freescale IOMMU support" |
| depends on PPC_E500MC |
| 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 ARCH_MSM8X60 || ARCH_MSM8960 |
| select IOMMU_API |
| 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 |
| depends on X86_64 && PCI && ACPI && X86_IO_APIC |
| ---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. |
| |
| config AMD_IOMMU_STATS |
| bool "Export AMD IOMMU statistics to debugfs" |
| depends on AMD_IOMMU |
| select DEBUG_FS |
| ---help--- |
| This option enables code in the AMD IOMMU driver to collect various |
| statistics about whats happening in the driver and exports that |
| information to userspace via debugfs. |
| If unsure, say N. |
| |
| config AMD_IOMMU_V2 |
| tristate "AMD IOMMU Version 2 driver" |
| depends on AMD_IOMMU && PROFILING |
| 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. |
| |
| # 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 DMAR_TABLE |
| 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_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 ARCH_OMAP2PLUS |
| select IOMMU_API |
| |
| config OMAP_IOVMM |
| tristate "OMAP IO Virtual Memory Manager Support" |
| depends on OMAP_IOMMU |
| |
| config OMAP_IOMMU_DEBUG |
| tristate "Export OMAP IOMMU/IOVMM internals in DebugFS" |
| depends on OMAP_IOVMM && DEBUG_FS |
| help |
| Select this to see extensive information about |
| the internal state of OMAP IOMMU/IOVMM in debugfs. |
| |
| Say N unless you know you need this. |
| |
| 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 "Tegra SMMU IOMMU Support" |
| depends on ARCH_TEGRA && TEGRA_AHB |
| select IOMMU_API |
| help |
| Enables support for remapping discontiguous physical memory |
| shared with the operating system into contiguous I/O virtual |
| space through the SMMU (System Memory Management Unit) |
| hardware included on Tegra SoCs. |
| |
| config EXYNOS_IOMMU |
| bool "Exynos IOMMU Support" |
| depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU |
| select IOMMU_API |
| help |
| Support for the IOMMU(System MMU) of Samsung Exynos application |
| processor family. This enables H/W multimedia accellerators to see |
| non-linear physical memory chunks as a linear memory in their |
| address spaces |
| |
| 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 SHMOBILE_IPMMU |
| bool |
| |
| config SHMOBILE_IPMMU_TLB |
| bool |
| |
| config SHMOBILE_IOMMU |
| bool "IOMMU for Renesas IPMMU/IPMMUI" |
| default n |
| depends on (ARM && ARCH_SHMOBILE) |
| select IOMMU_API |
| select ARM_DMA_USE_IOMMU |
| select SHMOBILE_IPMMU |
| select SHMOBILE_IPMMU_TLB |
| help |
| Support for Renesas IPMMU/IPMMUI. This option enables |
| remapping of DMA memory accesses from all of the IP blocks |
| on the ICB. |
| |
| Warning: Drivers (including userspace drivers of UIO |
| devices) of the IP blocks on the ICB *must* use addresses |
| allocated from the IPMMU (iova) for DMA with this option |
| enabled. |
| |
| If unsure, say N. |
| |
| choice |
| prompt "IPMMU/IPMMUI address space size" |
| default SHMOBILE_IOMMU_ADDRSIZE_2048MB |
| depends on SHMOBILE_IOMMU |
| help |
| This option sets IPMMU/IPMMUI address space size by |
| adjusting the 1st level page table size. The page table size |
| is calculated as follows: |
| |
| page table size = number of page table entries * 4 bytes |
| number of page table entries = address space size / 1 MiB |
| |
| For example, when the address space size is 2048 MiB, the |
| 1st level page table size is 8192 bytes. |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_2048MB |
| bool "2 GiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_1024MB |
| bool "1 GiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_512MB |
| bool "512 MiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_256MB |
| bool "256 MiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_128MB |
| bool "128 MiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_64MB |
| bool "64 MiB" |
| |
| config SHMOBILE_IOMMU_ADDRSIZE_32MB |
| bool "32 MiB" |
| |
| endchoice |
| |
| config SHMOBILE_IOMMU_L1SIZE |
| int |
| default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB |
| default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB |
| default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB |
| default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB |
| default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB |
| default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB |
| default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB |
| |
| 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 ARM_SMMU |
| bool "ARM Ltd. System MMU (SMMU) Support" |
| depends on ARM64 || (ARM_LPAE && OF) |
| select IOMMU_API |
| select ARM_DMA_USE_IOMMU if ARM |
| help |
| Support for implementations of the ARM System MMU architecture |
| versions 1 and 2. The driver supports both v7l and v8l table |
| formats with 4k and 64k page sizes. |
| |
| Say Y here if your SoC includes an IOMMU device implementing |
| the ARM SMMU architecture. |
| |
| endif # IOMMU_SUPPORT |