Root/drivers/iommu/Kconfig

1# IOMMU_API always gets selected by whoever wants it.
2config IOMMU_API
3    bool
4
5menuconfig 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
16config OF_IOMMU
17       def_bool y
18       depends on OF
19
20# MSM IOMMU support
21config 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
32config IOMMU_PGTABLES_L2
33    def_bool y
34    depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
35
36# AMD IOMMU support
37config AMD_IOMMU
38    bool "AMD IOMMU support"
39    select SWIOTLB
40    select PCI_MSI
41    select PCI_ATS
42    select PCI_PRI
43    select PCI_PASID
44    select IOMMU_API
45    depends on X86_64 && PCI && ACPI && X86_IO_APIC
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
50      can isolate the DMA memory of different devices and protect the
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
57config 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.
66
67config AMD_IOMMU_V2
68    tristate "AMD IOMMU Version 2 driver"
69    depends on AMD_IOMMU && PROFILING
70    select MMU_NOTIFIER
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
74      the PCI PRI and PASID interface.
75
76# Intel IOMMU support
77config DMAR_TABLE
78    bool
79
80config INTEL_IOMMU
81    bool "Support for Intel IOMMU using DMA Remapping Devices"
82    depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
83    select IOMMU_API
84    select DMAR_TABLE
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
92config INTEL_IOMMU_DEFAULT_ON
93    def_bool y
94    prompt "Enable Intel DMA Remapping Devices by default"
95    depends on INTEL_IOMMU
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
101config INTEL_IOMMU_BROKEN_GFX_WA
102    bool "Workaround broken graphics drivers (going away soon)"
103    depends on INTEL_IOMMU && BROKEN && X86
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
112config INTEL_IOMMU_FLOPPY_WA
113    def_bool y
114    depends on INTEL_IOMMU && X86
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
121config IRQ_REMAP
122    bool "Support for Interrupt Remapping"
123    depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
124    select DMAR_TABLE
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.
129
130# OMAP IOMMU support
131config OMAP_IOMMU
132    bool "OMAP IOMMU Support"
133    depends on ARCH_OMAP2PLUS
134    select IOMMU_API
135
136config OMAP_IOVMM
137    tristate "OMAP IO Virtual Memory Manager Support"
138    depends on OMAP_IOMMU
139
140config 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
149config 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
159config TEGRA_IOMMU_SMMU
160    bool "Tegra SMMU IOMMU Support"
161    depends on ARCH_TEGRA && TEGRA_AHB
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
169config 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
181config 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
190config SHMOBILE_IPMMU
191    bool
192
193config SHMOBILE_IPMMU_TLB
194    bool
195
196config SHMOBILE_IOMMU
197    bool "IOMMU for Renesas IPMMU/IPMMUI"
198    default n
199    depends on (ARM && ARCH_SHMOBILE)
200    select IOMMU_API
201    select ARM_DMA_USE_IOMMU
202    select SHMOBILE_IPMMU
203    select SHMOBILE_IPMMU_TLB
204    help
205      Support for Renesas IPMMU/IPMMUI. This option enables
206      remapping of DMA memory accesses from all of the IP blocks
207      on the ICB.
208
209      Warning: Drivers (including userspace drivers of UIO
210      devices) of the IP blocks on the ICB *must* use addresses
211      allocated from the IPMMU (iova) for DMA with this option
212      enabled.
213
214      If unsure, say N.
215
216choice
217    prompt "IPMMU/IPMMUI address space size"
218    default SHMOBILE_IOMMU_ADDRSIZE_2048MB
219    depends on SHMOBILE_IOMMU
220    help
221      This option sets IPMMU/IPMMUI address space size by
222      adjusting the 1st level page table size. The page table size
223      is calculated as follows:
224
225          page table size = number of page table entries * 4 bytes
226          number of page table entries = address space size / 1 MiB
227
228      For example, when the address space size is 2048 MiB, the
229      1st level page table size is 8192 bytes.
230
231    config SHMOBILE_IOMMU_ADDRSIZE_2048MB
232        bool "2 GiB"
233
234    config SHMOBILE_IOMMU_ADDRSIZE_1024MB
235        bool "1 GiB"
236
237    config SHMOBILE_IOMMU_ADDRSIZE_512MB
238        bool "512 MiB"
239
240    config SHMOBILE_IOMMU_ADDRSIZE_256MB
241        bool "256 MiB"
242
243    config SHMOBILE_IOMMU_ADDRSIZE_128MB
244        bool "128 MiB"
245
246    config SHMOBILE_IOMMU_ADDRSIZE_64MB
247        bool "64 MiB"
248
249    config SHMOBILE_IOMMU_ADDRSIZE_32MB
250        bool "32 MiB"
251
252endchoice
253
254config SHMOBILE_IOMMU_L1SIZE
255    int
256    default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
257    default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
258    default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
259    default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
260    default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
261    default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
262    default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
263
264endif # IOMMU_SUPPORT
265

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