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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
Suresh Siddhad3f13812011-08-23 17:05:25 -070062config DMAR_TABLE
63 bool
64
65config INTEL_IOMMU
66 bool "Support for Intel IOMMU using DMA Remapping Devices"
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030067 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
68 select IOMMU_API
Suresh Siddhad3f13812011-08-23 17:05:25 -070069 select DMAR_TABLE
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030070 help
71 DMA remapping (DMAR) devices support enables independent address
72 translations for Direct Memory Access (DMA) from devices.
73 These DMA remapping devices are reported via ACPI tables
74 and include PCI device scope covered by these DMA
75 remapping devices.
76
Suresh Siddhad3f13812011-08-23 17:05:25 -070077config INTEL_IOMMU_DEFAULT_ON
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030078 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -070079 prompt "Enable Intel DMA Remapping Devices by default"
80 depends on INTEL_IOMMU
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030081 help
82 Selecting this option will enable a DMAR device at boot time if
83 one is found. If this option is not selected, DMAR support can
84 be enabled by passing intel_iommu=on to the kernel.
85
Suresh Siddhad3f13812011-08-23 17:05:25 -070086config INTEL_IOMMU_BROKEN_GFX_WA
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030087 bool "Workaround broken graphics drivers (going away soon)"
Suresh Siddhad3f13812011-08-23 17:05:25 -070088 depends on INTEL_IOMMU && BROKEN && X86
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030089 ---help---
90 Current Graphics drivers tend to use physical address
91 for DMA and avoid using DMA APIs. Setting this config
92 option permits the IOMMU driver to set a unity map for
93 all the OS-visible memory. Hence the driver can continue
94 to use physical addresses for DMA, at least until this
95 option is removed in the 2.6.32 kernel.
96
Suresh Siddhad3f13812011-08-23 17:05:25 -070097config INTEL_IOMMU_FLOPPY_WA
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +030098 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -070099 depends on INTEL_IOMMU && X86
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300100 ---help---
101 Floppy disk drivers are known to bypass DMA API calls
102 thereby failing to work when IOMMU is enabled. This
103 workaround will setup a 1:1 mapping for the first
104 16MiB to make floppy (an ISA device) work.
105
Suresh Siddhad3f13812011-08-23 17:05:25 -0700106config IRQ_REMAP
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300107 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
108 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Suresh Siddhad3f13812011-08-23 17:05:25 -0700109 select DMAR_TABLE
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +0300110 ---help---
111 Supports Interrupt remapping for IO-APIC and MSI devices.
112 To use x2apic mode in the CPU's which support x2APIC enhancements or
113 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Joerg Roedel68255b62011-06-14 15:51:54 +0200114
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300115# OMAP IOMMU support
116config OMAP_IOMMU
117 bool "OMAP IOMMU Support"
Ohad Ben-Cohen024ae882011-08-29 07:57:44 +0300118 depends on ARCH_OMAP
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300119 select IOMMU_API
120
121config OMAP_IOVMM
Joerg Roedel7b6d45f2011-09-14 16:03:45 +0200122 tristate "OMAP IO Virtual Memory Manager Support"
123 depends on OMAP_IOMMU
Ohad Ben-Cohenfcf3a6e2011-08-15 23:21:41 +0300124
125config OMAP_IOMMU_DEBUG
126 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
127 depends on OMAP_IOVMM && DEBUG_FS
128 help
129 Select this to see extensive information about
130 the internal state of OMAP IOMMU/IOVMM in debugfs.
131
132 Say N unless you know you need this.
133
Joerg Roedel68255b62011-06-14 15:51:54 +0200134endif # IOMMU_SUPPORT