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 16# MSM IOMMU support 17config MSM_IOMMU 18 bool "MSM IOMMU Support" 19 depends on ARCH_MSM8X60 || ARCH_MSM8960 20 select IOMMU_API 21 help 22 Support for the IOMMUs found on certain Qualcomm SOCs. 23 These IOMMUs allow virtualization of the address space used by most 24 cores within the multimedia subsystem. 25 26 If unsure, say N here. 27 28config IOMMU_PGTABLES_L2 29 def_bool y 30 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n 31 32# AMD IOMMU support 33config AMD_IOMMU 34 bool "AMD IOMMU support" 35 select SWIOTLB 36 select PCI_MSI 37 select PCI_IOV 38 select IOMMU_API 39 depends on X86_64 && PCI && ACPI 40 ---help--- 41 With this option you can enable support for AMD IOMMU hardware in 42 your system. An IOMMU is a hardware component which provides 43 remapping of DMA memory accesses from devices. With an AMD IOMMU you 44 can isolate the the DMA memory of different devices and protect the 45 system from misbehaving device drivers or hardware. 46 47 You can find out if your system has an AMD IOMMU if you look into 48 your BIOS for an option to enable it or if you have an IVRS ACPI 49 table. 50 51config AMD_IOMMU_STATS 52 bool "Export AMD IOMMU statistics to debugfs" 53 depends on AMD_IOMMU 54 select DEBUG_FS 55 ---help--- 56 This option enables code in the AMD IOMMU driver to collect various 57 statistics about whats happening in the driver and exports that 58 information to userspace via debugfs. 59 If unsure, say N. 60 61# Intel IOMMU support 62config DMAR_TABLE 63 bool 64 65config INTEL_IOMMU 66 bool "Support for Intel IOMMU using DMA Remapping Devices" 67 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) 68 select IOMMU_API 69 select DMAR_TABLE 70 help 71 DMA remapping (DMAR) devices support enables independent address 72 translations for Direct Memory Access (DMA) from devices. 73 These DMA remapping devices are reported via ACPI tables 74 and include PCI device scope covered by these DMA 75 remapping devices. 76 77config INTEL_IOMMU_DEFAULT_ON 78 def_bool y 79 prompt "Enable Intel DMA Remapping Devices by default" 80 depends on INTEL_IOMMU 81 help 82 Selecting this option will enable a DMAR device at boot time if 83 one is found. If this option is not selected, DMAR support can 84 be enabled by passing intel_iommu=on to the kernel. 85 86config INTEL_IOMMU_BROKEN_GFX_WA 87 bool "Workaround broken graphics drivers (going away soon)" 88 depends on INTEL_IOMMU && BROKEN && X86 89 ---help--- 90 Current Graphics drivers tend to use physical address 91 for DMA and avoid using DMA APIs. Setting this config 92 option permits the IOMMU driver to set a unity map for 93 all the OS-visible memory. Hence the driver can continue 94 to use physical addresses for DMA, at least until this 95 option is removed in the 2.6.32 kernel. 96 97config INTEL_IOMMU_FLOPPY_WA 98 def_bool y 99 depends on INTEL_IOMMU && X86 100 ---help--- 101 Floppy disk drivers are known to bypass DMA API calls 102 thereby failing to work when IOMMU is enabled. This 103 workaround will setup a 1:1 mapping for the first 104 16MiB to make floppy (an ISA device) work. 105 106config IRQ_REMAP 107 bool "Support for Interrupt Remapping (EXPERIMENTAL)" 108 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL 109 select DMAR_TABLE 110 ---help--- 111 Supports Interrupt remapping for IO-APIC and MSI devices. 112 To use x2apic mode in the CPU's which support x2APIC enhancements or 113 to support platforms with CPU's having > 8 bit APIC ID, say Y. 114 115# OMAP IOMMU support 116config OMAP_IOMMU 117 bool "OMAP IOMMU Support" 118 depends on ARCH_OMAP 119 select IOMMU_API 120 121config OMAP_IOVMM 122 tristate "OMAP IO Virtual Memory Manager Support" 123 depends on OMAP_IOMMU 124 125config OMAP_IOMMU_DEBUG 126 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS" 127 depends on OMAP_IOVMM && DEBUG_FS 128 help 129 Select this to see extensive information about 130 the internal state of OMAP IOMMU/IOVMM in debugfs. 131 132 Say N unless you know you need this. 133 134endif # IOMMU_SUPPORT 135