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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 | ||
4e0ee78f HD |
16 | config OF_IOMMU |
17 | def_bool y | |
18 | depends on OF | |
19 | ||
b10f127e OBC |
20 | # MSM IOMMU support |
21 | config 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 | ||
32 | config IOMMU_PGTABLES_L2 | |
33 | def_bool y | |
34 | depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n | |
29b68415 OBC |
35 | |
36 | # AMD IOMMU support | |
37 | config AMD_IOMMU | |
38 | bool "AMD IOMMU support" | |
39 | select SWIOTLB | |
40 | select PCI_MSI | |
52815b75 JR |
41 | select PCI_ATS |
42 | select PCI_PRI | |
43 | select PCI_PASID | |
29b68415 | 44 | select IOMMU_API |
eb1eb7ae | 45 | depends on X86_64 && PCI && ACPI && X86_IO_APIC |
29b68415 OBC |
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 | |
59bf8964 | 50 | can isolate the DMA memory of different devices and protect the |
29b68415 OBC |
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 | ||
57 | config 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. | |
166e9278 | 66 | |
e3c495c7 JR |
67 | config AMD_IOMMU_V2 |
68 | tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)" | |
8736b2c3 JR |
69 | depends on AMD_IOMMU && PROFILING && EXPERIMENTAL |
70 | select MMU_NOTIFIER | |
e3c495c7 JR |
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 | |
59bf8964 | 74 | the PCI PRI and PASID interface. |
e3c495c7 | 75 | |
166e9278 | 76 | # Intel IOMMU support |
d3f13810 SS |
77 | config DMAR_TABLE |
78 | bool | |
79 | ||
80 | config INTEL_IOMMU | |
81 | bool "Support for Intel IOMMU using DMA Remapping Devices" | |
166e9278 OBC |
82 | depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) |
83 | select IOMMU_API | |
d3f13810 | 84 | select DMAR_TABLE |
166e9278 OBC |
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 | ||
d3f13810 | 92 | config INTEL_IOMMU_DEFAULT_ON |
166e9278 | 93 | def_bool y |
d3f13810 SS |
94 | prompt "Enable Intel DMA Remapping Devices by default" |
95 | depends on INTEL_IOMMU | |
166e9278 OBC |
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 | ||
d3f13810 | 101 | config INTEL_IOMMU_BROKEN_GFX_WA |
166e9278 | 102 | bool "Workaround broken graphics drivers (going away soon)" |
d3f13810 | 103 | depends on INTEL_IOMMU && BROKEN && X86 |
166e9278 OBC |
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 | ||
d3f13810 | 112 | config INTEL_IOMMU_FLOPPY_WA |
166e9278 | 113 | def_bool y |
d3f13810 | 114 | depends on INTEL_IOMMU && X86 |
166e9278 OBC |
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 | ||
d3f13810 | 121 | config IRQ_REMAP |
166e9278 OBC |
122 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
123 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL | |
d3f13810 | 124 | select DMAR_TABLE |
166e9278 OBC |
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. | |
68255b62 | 129 | |
fcf3a6ef OBC |
130 | # OMAP IOMMU support |
131 | config OMAP_IOMMU | |
132 | bool "OMAP IOMMU Support" | |
024ae884 | 133 | depends on ARCH_OMAP |
fcf3a6ef OBC |
134 | select IOMMU_API |
135 | ||
136 | config OMAP_IOVMM | |
7b6d45f1 JR |
137 | tristate "OMAP IO Virtual Memory Manager Support" |
138 | depends on OMAP_IOMMU | |
fcf3a6ef OBC |
139 | |
140 | config 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 | ||
d53e54b4 HD |
149 | config 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 | ||
7a31f6f4 HD |
159 | config TEGRA_IOMMU_SMMU |
160 | bool "Tegra SMMU IOMMU Support" | |
0760e8fa | 161 | depends on ARCH_TEGRA_3x_SOC && TEGRA_AHB |
7a31f6f4 HD |
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 | ||
2a96536e KC |
169 | config 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 | ||
181 | config 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 | ||
68255b62 | 190 | endif # IOMMU_SUPPORT |