| # 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 | |
| # 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 | |
| endif # IOMMU_SUPPORT |