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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
Joerg Roedel52815b72011-11-17 17:24:28 +010037 select PCI_ATS
38 select PCI_PRI
39 select PCI_PASID
Ohad Ben-Cohen29b68412011-06-05 18:22:18 +030040 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
53config 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.
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030062
Joerg Roedele3c495c2011-11-09 12:31:15 +010063config AMD_IOMMU_V2
64 tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
Joerg Roedel8736b2c2011-11-24 16:21:52 +010065 depends on AMD_IOMMU && PROFILING && EXPERIMENTAL
66 select MMU_NOTIFIER
Joerg Roedele3c495c2011-11-09 12:31:15 +010067 ---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
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030072# Intel IOMMU support
Suresh Siddhad3f13812011-08-23 17:05:25 -070073config DMAR_TABLE
74 bool
75
76config INTEL_IOMMU
77 bool "Support for Intel IOMMU using DMA Remapping Devices"
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030078 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
79 select IOMMU_API
Suresh Siddhad3f13812011-08-23 17:05:25 -070080 select DMAR_TABLE
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030081 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
Suresh Siddhad3f13812011-08-23 17:05:25 -070088config INTEL_IOMMU_DEFAULT_ON
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030089 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -070090 prompt "Enable Intel DMA Remapping Devices by default"
91 depends on INTEL_IOMMU
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030092 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
Suresh Siddhad3f13812011-08-23 17:05:25 -070097config INTEL_IOMMU_BROKEN_GFX_WA
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030098 bool "Workaround broken graphics drivers (going away soon)"
Suresh Siddhad3f13812011-08-23 17:05:25 -070099 depends on INTEL_IOMMU && BROKEN && X86
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300100 ---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
Suresh Siddhad3f13812011-08-23 17:05:25 -0700108config INTEL_IOMMU_FLOPPY_WA
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300109 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -0700110 depends on INTEL_IOMMU && X86
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300111 ---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
Suresh Siddhad3f13812011-08-23 17:05:25 -0700117config IRQ_REMAP
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300118 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
119 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Suresh Siddhad3f13812011-08-23 17:05:25 -0700120 select DMAR_TABLE
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300121 ---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.
Joerg Roedel68255b62011-06-14 15:51:54 +0200125
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300126# OMAP IOMMU support
127config OMAP_IOMMU
128 bool "OMAP IOMMU Support"
Ohad Ben-Cohen024ae882011-08-29 07:57:44 +0300129 depends on ARCH_OMAP
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300130 select IOMMU_API
131
132config OMAP_IOVMM
Joerg Roedel7b6d45f2011-09-14 16:03:45 +0200133 tristate "OMAP IO Virtual Memory Manager Support"
134 depends on OMAP_IOMMU
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300135
136config 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
Joerg Roedel68255b62011-06-14 15:51:54 +0200145endif # IOMMU_SUPPORT