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Ohad Ben-Cohenab493a02011-06-02 02:48:05 +03001# IOMMU_API always gets selected by whoever wants it.
2config IOMMU_API
3 bool
Ohad Ben-Cohenb10f1272011-06-02 03:20:08 +03004
Joerg Roedel68255b62011-06-14 15:51:54 +02005menuconfig 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
Ohad Ben-Cohenb10f1272011-06-02 03:20:08 +030016# 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
Ohad Ben-Cohen29b68412011-06-05 18:22:18 +030031
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.
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030060
61# Intel IOMMU support
62config DMAR
63 bool "Support for DMA Remapping Devices"
64 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
65 select IOMMU_API
66 help
67 DMA remapping (DMAR) devices support enables independent address
68 translations for Direct Memory Access (DMA) from devices.
69 These DMA remapping devices are reported via ACPI tables
70 and include PCI device scope covered by these DMA
71 remapping devices.
72
73config DMAR_DEFAULT_ON
74 def_bool y
75 prompt "Enable DMA Remapping Devices by default"
76 depends on DMAR
77 help
78 Selecting this option will enable a DMAR device at boot time if
79 one is found. If this option is not selected, DMAR support can
80 be enabled by passing intel_iommu=on to the kernel.
81
82config DMAR_BROKEN_GFX_WA
83 bool "Workaround broken graphics drivers (going away soon)"
84 depends on DMAR && BROKEN && X86
85 ---help---
86 Current Graphics drivers tend to use physical address
87 for DMA and avoid using DMA APIs. Setting this config
88 option permits the IOMMU driver to set a unity map for
89 all the OS-visible memory. Hence the driver can continue
90 to use physical addresses for DMA, at least until this
91 option is removed in the 2.6.32 kernel.
92
93config DMAR_FLOPPY_WA
94 def_bool y
95 depends on DMAR && X86
96 ---help---
97 Floppy disk drivers are known to bypass DMA API calls
98 thereby failing to work when IOMMU is enabled. This
99 workaround will setup a 1:1 mapping for the first
100 16MiB to make floppy (an ISA device) work.
101
102config INTR_REMAP
103 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
104 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
105 ---help---
106 Supports Interrupt remapping for IO-APIC and MSI devices.
107 To use x2apic mode in the CPU's which support x2APIC enhancements or
108 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Joerg Roedel68255b62011-06-14 15:51:54 +0200109
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300110# OMAP IOMMU support
111config OMAP_IOMMU
112 bool "OMAP IOMMU Support"
113 select IOMMU_API
114
115config OMAP_IOVMM
116 tristate
117 select OMAP_IOMMU
118
119config OMAP_IOMMU_DEBUG
120 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
121 depends on OMAP_IOVMM && DEBUG_FS
122 help
123 Select this to see extensive information about
124 the internal state of OMAP IOMMU/IOVMM in debugfs.
125
126 Say N unless you know you need this.
127
Joerg Roedel68255b62011-06-14 15:51:54 +0200128endif # IOMMU_SUPPORT