1 # IOMMU_API always gets selected by whoever wants it.
5 menuconfig IOMMU_SUPPORT
6 bool "IOMMU Hardware Support"
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
18 bool "MSM IOMMU Support"
19 depends on ARCH_MSM8X60 || ARCH_MSM8960
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.
26 If unsure, say N here.
28 config IOMMU_PGTABLES_L2
30 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
34 bool "AMD IOMMU support"
41 depends on X86_64 && PCI && ACPI
43 With this option you can enable support for AMD IOMMU hardware in
44 your system. An IOMMU is a hardware component which provides
45 remapping of DMA memory accesses from devices. With an AMD IOMMU you
46 can isolate the the DMA memory of different devices and protect the
47 system from misbehaving device drivers or hardware.
49 You can find out if your system has an AMD IOMMU if you look into
50 your BIOS for an option to enable it or if you have an IVRS ACPI
53 config AMD_IOMMU_STATS
54 bool "Export AMD IOMMU statistics to debugfs"
58 This option enables code in the AMD IOMMU driver to collect various
59 statistics about whats happening in the driver and exports that
60 information to userspace via debugfs.
64 tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
65 depends on AMD_IOMMU && EXPERIMENTAL
67 This option enables support for the AMD IOMMUv2 features of the IOMMU
68 hardware. Select this option if you want to use devices that support
69 the the PCI PRI and PASID interface.
76 bool "Support for Intel IOMMU using DMA Remapping Devices"
77 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
81 DMA remapping (DMAR) devices support enables independent address
82 translations for Direct Memory Access (DMA) from devices.
83 These DMA remapping devices are reported via ACPI tables
84 and include PCI device scope covered by these DMA
87 config INTEL_IOMMU_DEFAULT_ON
89 prompt "Enable Intel DMA Remapping Devices by default"
90 depends on INTEL_IOMMU
92 Selecting this option will enable a DMAR device at boot time if
93 one is found. If this option is not selected, DMAR support can
94 be enabled by passing intel_iommu=on to the kernel.
96 config INTEL_IOMMU_BROKEN_GFX_WA
97 bool "Workaround broken graphics drivers (going away soon)"
98 depends on INTEL_IOMMU && BROKEN && X86
100 Current Graphics drivers tend to use physical address
101 for DMA and avoid using DMA APIs. Setting this config
102 option permits the IOMMU driver to set a unity map for
103 all the OS-visible memory. Hence the driver can continue
104 to use physical addresses for DMA, at least until this
105 option is removed in the 2.6.32 kernel.
107 config INTEL_IOMMU_FLOPPY_WA
109 depends on INTEL_IOMMU && X86
111 Floppy disk drivers are known to bypass DMA API calls
112 thereby failing to work when IOMMU is enabled. This
113 workaround will setup a 1:1 mapping for the first
114 16MiB to make floppy (an ISA device) work.
117 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
118 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
121 Supports Interrupt remapping for IO-APIC and MSI devices.
122 To use x2apic mode in the CPU's which support x2APIC enhancements or
123 to support platforms with CPU's having > 8 bit APIC ID, say Y.
127 bool "OMAP IOMMU Support"
132 tristate "OMAP IO Virtual Memory Manager Support"
133 depends on OMAP_IOMMU
135 config OMAP_IOMMU_DEBUG
136 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
137 depends on OMAP_IOVMM && DEBUG_FS
139 Select this to see extensive information about
140 the internal state of OMAP IOMMU/IOVMM in debugfs.
142 Say N unless you know you need this.
144 endif # IOMMU_SUPPORT