Commit | Line | Data |
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ab493a0f OBC |
1 | # IOMMU_API always gets selected by whoever wants it. |
2 | config IOMMU_API | |
3 | bool | |
b10f127e | 4 | |
68255b62 JR |
5 | menuconfig 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 | ||
14 | if IOMMU_SUPPORT | |
15 | ||
b10f127e OBC |
16 | # MSM IOMMU support |
17 | config 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 | ||
28 | config IOMMU_PGTABLES_L2 | |
29 | def_bool y | |
30 | depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n | |
29b68415 OBC |
31 | |
32 | # AMD IOMMU support | |
33 | config AMD_IOMMU | |
34 | bool "AMD IOMMU support" | |
35 | select SWIOTLB | |
36 | select PCI_MSI | |
52815b75 JR |
37 | select PCI_ATS |
38 | select PCI_PRI | |
39 | select PCI_PASID | |
29b68415 OBC |
40 | select IOMMU_API |
41 | depends on X86_64 && PCI && ACPI | |
42 | ---help--- | |
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. | |
48 | ||
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 | |
51 | table. | |
52 | ||
53 | config AMD_IOMMU_STATS | |
54 | bool "Export AMD IOMMU statistics to debugfs" | |
55 | depends on AMD_IOMMU | |
56 | select DEBUG_FS | |
57 | ---help--- | |
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. | |
61 | If unsure, say N. | |
166e9278 | 62 | |
e3c495c7 JR |
63 | config AMD_IOMMU_V2 |
64 | tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)" | |
8736b2c3 JR |
65 | depends on AMD_IOMMU && PROFILING && EXPERIMENTAL |
66 | select MMU_NOTIFIER | |
e3c495c7 JR |
67 | ---help--- |
68 | This option enables support for the AMD IOMMUv2 features of the IOMMU | |
69 | hardware. Select this option if you want to use devices that support | |
70 | the the PCI PRI and PASID interface. | |
71 | ||
166e9278 | 72 | # Intel IOMMU support |
d3f13810 SS |
73 | config DMAR_TABLE |
74 | bool | |
75 | ||
76 | config INTEL_IOMMU | |
77 | bool "Support for Intel IOMMU using DMA Remapping Devices" | |
166e9278 OBC |
78 | depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) |
79 | select IOMMU_API | |
d3f13810 | 80 | select DMAR_TABLE |
166e9278 OBC |
81 | help |
82 | DMA remapping (DMAR) devices support enables independent address | |
83 | translations for Direct Memory Access (DMA) from devices. | |
84 | These DMA remapping devices are reported via ACPI tables | |
85 | and include PCI device scope covered by these DMA | |
86 | remapping devices. | |
87 | ||
d3f13810 | 88 | config INTEL_IOMMU_DEFAULT_ON |
166e9278 | 89 | def_bool y |
d3f13810 SS |
90 | prompt "Enable Intel DMA Remapping Devices by default" |
91 | depends on INTEL_IOMMU | |
166e9278 OBC |
92 | help |
93 | Selecting this option will enable a DMAR device at boot time if | |
94 | one is found. If this option is not selected, DMAR support can | |
95 | be enabled by passing intel_iommu=on to the kernel. | |
96 | ||
d3f13810 | 97 | config INTEL_IOMMU_BROKEN_GFX_WA |
166e9278 | 98 | bool "Workaround broken graphics drivers (going away soon)" |
d3f13810 | 99 | depends on INTEL_IOMMU && BROKEN && X86 |
166e9278 OBC |
100 | ---help--- |
101 | Current Graphics drivers tend to use physical address | |
102 | for DMA and avoid using DMA APIs. Setting this config | |
103 | option permits the IOMMU driver to set a unity map for | |
104 | all the OS-visible memory. Hence the driver can continue | |
105 | to use physical addresses for DMA, at least until this | |
106 | option is removed in the 2.6.32 kernel. | |
107 | ||
d3f13810 | 108 | config INTEL_IOMMU_FLOPPY_WA |
166e9278 | 109 | def_bool y |
d3f13810 | 110 | depends on INTEL_IOMMU && X86 |
166e9278 OBC |
111 | ---help--- |
112 | Floppy disk drivers are known to bypass DMA API calls | |
113 | thereby failing to work when IOMMU is enabled. This | |
114 | workaround will setup a 1:1 mapping for the first | |
115 | 16MiB to make floppy (an ISA device) work. | |
116 | ||
d3f13810 | 117 | config IRQ_REMAP |
166e9278 OBC |
118 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
119 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL | |
d3f13810 | 120 | select DMAR_TABLE |
166e9278 OBC |
121 | ---help--- |
122 | Supports Interrupt remapping for IO-APIC and MSI devices. | |
123 | To use x2apic mode in the CPU's which support x2APIC enhancements or | |
124 | to support platforms with CPU's having > 8 bit APIC ID, say Y. | |
68255b62 | 125 | |
fcf3a6ef OBC |
126 | # OMAP IOMMU support |
127 | config OMAP_IOMMU | |
128 | bool "OMAP IOMMU Support" | |
024ae884 | 129 | depends on ARCH_OMAP |
fcf3a6ef OBC |
130 | select IOMMU_API |
131 | ||
132 | config OMAP_IOVMM | |
7b6d45f1 JR |
133 | tristate "OMAP IO Virtual Memory Manager Support" |
134 | depends on OMAP_IOMMU | |
fcf3a6ef OBC |
135 | |
136 | config OMAP_IOMMU_DEBUG | |
137 | tristate "Export OMAP IOMMU/IOVMM internals in DebugFS" | |
138 | depends on OMAP_IOVMM && DEBUG_FS | |
139 | help | |
140 | Select this to see extensive information about | |
141 | the internal state of OMAP IOMMU/IOVMM in debugfs. | |
142 | ||
143 | Say N unless you know you need this. | |
144 | ||
d53e54b4 HD |
145 | config TEGRA_IOMMU_GART |
146 | bool "Tegra GART IOMMU Support" | |
147 | depends on ARCH_TEGRA_2x_SOC | |
148 | select IOMMU_API | |
149 | help | |
150 | Enables support for remapping discontiguous physical memory | |
151 | shared with the operating system into contiguous I/O virtual | |
152 | space through the GART (Graphics Address Relocation Table) | |
153 | hardware included on Tegra SoCs. | |
154 | ||
7a31f6f4 HD |
155 | config TEGRA_IOMMU_SMMU |
156 | bool "Tegra SMMU IOMMU Support" | |
157 | depends on ARCH_TEGRA_3x_SOC | |
158 | select IOMMU_API | |
159 | help | |
160 | Enables support for remapping discontiguous physical memory | |
161 | shared with the operating system into contiguous I/O virtual | |
162 | space through the SMMU (System Memory Management Unit) | |
163 | hardware included on Tegra SoCs. | |
164 | ||
68255b62 | 165 | endif # IOMMU_SUPPORT |