1# IOMMU_API always gets selected by whoever wants it. 2config IOMMU_API 3 bool 4 5menuconfig IOMMU_SUPPORT 6 bool "IOMMU Hardware Support" 7 default y 8 ---help--- 9 Say Y here if you want to compile device drivers for IO Memory 10 Management Units into the kernel. These devices usually allow to 11 remap DMA requests and/or remap interrupts from other devices on the 12 system. 13 14if IOMMU_SUPPORT 15 16config OF_IOMMU 17 def_bool y 18 depends on OF 19 20# MSM IOMMU support 21config MSM_IOMMU 22 bool "MSM IOMMU Support" 23 depends on ARCH_MSM8X60 || ARCH_MSM8960 24 select IOMMU_API 25 help 26 Support for the IOMMUs found on certain Qualcomm SOCs. 27 These IOMMUs allow virtualization of the address space used by most 28 cores within the multimedia subsystem. 29 30 If unsure, say N here. 31 32config IOMMU_PGTABLES_L2 33 def_bool y 34 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 35 36# AMD IOMMU support 37config AMD_IOMMU 38 bool "AMD IOMMU support" 39 select SWIOTLB 40 select PCI_MSI 41 select PCI_ATS 42 select PCI_PRI 43 select PCI_PASID 44 select IOMMU_API 45 depends on X86_64 && PCI && ACPI 46 ---help--- 47 With this option you can enable support for AMD IOMMU hardware in 48 your system. An IOMMU is a hardware component which provides 49 remapping of DMA memory accesses from devices. With an AMD IOMMU you 50 can isolate the DMA memory of different devices and protect the 51 system from misbehaving device drivers or hardware. 52 53 You can find out if your system has an AMD IOMMU if you look into 54 your BIOS for an option to enable it or if you have an IVRS ACPI 55 table. 56 57config AMD_IOMMU_STATS 58 bool "Export AMD IOMMU statistics to debugfs" 59 depends on AMD_IOMMU 60 select DEBUG_FS 61 ---help--- 62 This option enables code in the AMD IOMMU driver to collect various 63 statistics about whats happening in the driver and exports that 64 information to userspace via debugfs. 65 If unsure, say N. 66 67config AMD_IOMMU_V2 68 tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)" 69 depends on AMD_IOMMU && PROFILING && EXPERIMENTAL 70 select MMU_NOTIFIER 71 ---help--- 72 This option enables support for the AMD IOMMUv2 features of the IOMMU 73 hardware. Select this option if you want to use devices that support 74 the PCI PRI and PASID interface. 75 76# Intel IOMMU support 77config DMAR_TABLE 78 bool 79 80config INTEL_IOMMU 81 bool "Support for Intel IOMMU using DMA Remapping Devices" 82 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 83 select IOMMU_API 84 select DMAR_TABLE 85 help 86 DMA remapping (DMAR) devices support enables independent address 87 translations for Direct Memory Access (DMA) from devices. 88 These DMA remapping devices are reported via ACPI tables 89 and include PCI device scope covered by these DMA 90 remapping devices. 91 92config INTEL_IOMMU_DEFAULT_ON 93 def_bool y 94 prompt "Enable Intel DMA Remapping Devices by default" 95 depends on INTEL_IOMMU 96 help 97 Selecting this option will enable a DMAR device at boot time if 98 one is found. If this option is not selected, DMAR support can 99 be enabled by passing intel_iommu=on to the kernel. 100 101config INTEL_IOMMU_BROKEN_GFX_WA 102 bool "Workaround broken graphics drivers (going away soon)" 103 depends on INTEL_IOMMU && BROKEN && X86 104 ---help--- 105 Current Graphics drivers tend to use physical address 106 for DMA and avoid using DMA APIs. Setting this config 107 option permits the IOMMU driver to set a unity map for 108 all the OS-visible memory. Hence the driver can continue 109 to use physical addresses for DMA, at least until this 110 option is removed in the 2.6.32 kernel. 111 112config INTEL_IOMMU_FLOPPY_WA 113 def_bool y 114 depends on INTEL_IOMMU && X86 115 ---help--- 116 Floppy disk drivers are known to bypass DMA API calls 117 thereby failing to work when IOMMU is enabled. This 118 workaround will setup a 1:1 mapping for the first 119 16MiB to make floppy (an ISA device) work. 120 121config IRQ_REMAP 122 bool "Support for Interrupt Remapping (EXPERIMENTAL)" 123 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL 124 select DMAR_TABLE 125 ---help--- 126 Supports Interrupt remapping for IO-APIC and MSI devices. 127 To use x2apic mode in the CPU's which support x2APIC enhancements or 128 to support platforms with CPU's having > 8 bit APIC ID, say Y. 129 130# OMAP IOMMU support 131config OMAP_IOMMU 132 bool "OMAP IOMMU Support" 133 depends on ARCH_OMAP 134 select IOMMU_API 135 136config OMAP_IOVMM 137 tristate "OMAP IO Virtual Memory Manager Support" 138 depends on OMAP_IOMMU 139 140config OMAP_IOMMU_DEBUG 141 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS" 142 depends on OMAP_IOVMM && DEBUG_FS 143 help 144 Select this to see extensive information about 145 the internal state of OMAP IOMMU/IOVMM in debugfs. 146 147 Say N unless you know you need this. 148 149config TEGRA_IOMMU_GART 150 bool "Tegra GART IOMMU Support" 151 depends on ARCH_TEGRA_2x_SOC 152 select IOMMU_API 153 help 154 Enables support for remapping discontiguous physical memory 155 shared with the operating system into contiguous I/O virtual 156 space through the GART (Graphics Address Relocation Table) 157 hardware included on Tegra SoCs. 158 159config TEGRA_IOMMU_SMMU 160 bool "Tegra SMMU IOMMU Support" 161 depends on ARCH_TEGRA_3x_SOC && TEGRA_AHB 162 select IOMMU_API 163 help 164 Enables support for remapping discontiguous physical memory 165 shared with the operating system into contiguous I/O virtual 166 space through the SMMU (System Memory Management Unit) 167 hardware included on Tegra SoCs. 168 169config EXYNOS_IOMMU 170 bool "Exynos IOMMU Support" 171 depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU 172 select IOMMU_API 173 help 174 Support for the IOMMU(System MMU) of Samsung Exynos application 175 processor family. This enables H/W multimedia accellerators to see 176 non-linear physical memory chunks as a linear memory in their 177 address spaces 178 179 If unsure, say N here. 180 181config EXYNOS_IOMMU_DEBUG 182 bool "Debugging log for Exynos IOMMU" 183 depends on EXYNOS_IOMMU 184 help 185 Select this to see the detailed log message that shows what 186 happens in the IOMMU driver 187 188 Say N unless you need kernel log message for IOMMU debugging 189 190endif # IOMMU_SUPPORT 191