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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 OBC |
62 | |
63 | # Intel IOMMU support | |
d3f13810 SS |
64 | config DMAR_TABLE |
65 | bool | |
66 | ||
67 | config INTEL_IOMMU | |
68 | bool "Support for Intel IOMMU using DMA Remapping Devices" | |
166e9278 OBC |
69 | depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) |
70 | select IOMMU_API | |
d3f13810 | 71 | select DMAR_TABLE |
166e9278 OBC |
72 | help |
73 | DMA remapping (DMAR) devices support enables independent address | |
74 | translations for Direct Memory Access (DMA) from devices. | |
75 | These DMA remapping devices are reported via ACPI tables | |
76 | and include PCI device scope covered by these DMA | |
77 | remapping devices. | |
78 | ||
d3f13810 | 79 | config INTEL_IOMMU_DEFAULT_ON |
166e9278 | 80 | def_bool y |
d3f13810 SS |
81 | prompt "Enable Intel DMA Remapping Devices by default" |
82 | depends on INTEL_IOMMU | |
166e9278 OBC |
83 | help |
84 | Selecting this option will enable a DMAR device at boot time if | |
85 | one is found. If this option is not selected, DMAR support can | |
86 | be enabled by passing intel_iommu=on to the kernel. | |
87 | ||
d3f13810 | 88 | config INTEL_IOMMU_BROKEN_GFX_WA |
166e9278 | 89 | bool "Workaround broken graphics drivers (going away soon)" |
d3f13810 | 90 | depends on INTEL_IOMMU && BROKEN && X86 |
166e9278 OBC |
91 | ---help--- |
92 | Current Graphics drivers tend to use physical address | |
93 | for DMA and avoid using DMA APIs. Setting this config | |
94 | option permits the IOMMU driver to set a unity map for | |
95 | all the OS-visible memory. Hence the driver can continue | |
96 | to use physical addresses for DMA, at least until this | |
97 | option is removed in the 2.6.32 kernel. | |
98 | ||
d3f13810 | 99 | config INTEL_IOMMU_FLOPPY_WA |
166e9278 | 100 | def_bool y |
d3f13810 | 101 | depends on INTEL_IOMMU && X86 |
166e9278 OBC |
102 | ---help--- |
103 | Floppy disk drivers are known to bypass DMA API calls | |
104 | thereby failing to work when IOMMU is enabled. This | |
105 | workaround will setup a 1:1 mapping for the first | |
106 | 16MiB to make floppy (an ISA device) work. | |
107 | ||
d3f13810 | 108 | config IRQ_REMAP |
166e9278 OBC |
109 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
110 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL | |
d3f13810 | 111 | select DMAR_TABLE |
166e9278 OBC |
112 | ---help--- |
113 | Supports Interrupt remapping for IO-APIC and MSI devices. | |
114 | To use x2apic mode in the CPU's which support x2APIC enhancements or | |
115 | to support platforms with CPU's having > 8 bit APIC ID, say Y. | |
68255b62 | 116 | |
fcf3a6ef OBC |
117 | # OMAP IOMMU support |
118 | config OMAP_IOMMU | |
119 | bool "OMAP IOMMU Support" | |
024ae884 | 120 | depends on ARCH_OMAP |
fcf3a6ef OBC |
121 | select IOMMU_API |
122 | ||
123 | config OMAP_IOVMM | |
7b6d45f1 JR |
124 | tristate "OMAP IO Virtual Memory Manager Support" |
125 | depends on OMAP_IOMMU | |
fcf3a6ef OBC |
126 | |
127 | config OMAP_IOMMU_DEBUG | |
128 | tristate "Export OMAP IOMMU/IOVMM internals in DebugFS" | |
129 | depends on OMAP_IOVMM && DEBUG_FS | |
130 | help | |
131 | Select this to see extensive information about | |
132 | the internal state of OMAP IOMMU/IOVMM in debugfs. | |
133 | ||
134 | Say N unless you know you need this. | |
135 | ||
68255b62 | 136 | endif # IOMMU_SUPPORT |