1 # IOMMU_API always gets selected by whoever wants it.
5 menuconfig IOMMU_SUPPORT
6 bool "IOMMU Hardware Support"
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
22 bool "MSM IOMMU Support"
23 depends on ARCH_MSM8X60 || ARCH_MSM8960
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.
30 If unsure, say N here.
32 config IOMMU_PGTABLES_L2
34 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
38 bool "AMD IOMMU support"
45 depends on X86_64 && PCI && ACPI && X86_IO_APIC
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.
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
57 config AMD_IOMMU_STATS
58 bool "Export AMD IOMMU statistics to debugfs"
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.
68 tristate "AMD IOMMU Version 2 driver"
69 depends on AMD_IOMMU && PROFILING
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.
81 bool "Support for Intel IOMMU using DMA Remapping Devices"
82 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
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
92 config INTEL_IOMMU_DEFAULT_ON
94 prompt "Enable Intel DMA Remapping Devices by default"
95 depends on INTEL_IOMMU
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.
101 config INTEL_IOMMU_BROKEN_GFX_WA
102 bool "Workaround broken graphics drivers (going away soon)"
103 depends on INTEL_IOMMU && BROKEN && X86
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.
112 config INTEL_IOMMU_FLOPPY_WA
114 depends on INTEL_IOMMU && X86
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.
122 bool "Support for Interrupt Remapping"
123 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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.
132 bool "OMAP IOMMU Support"
133 depends on ARCH_OMAP2PLUS
137 tristate "OMAP IO Virtual Memory Manager Support"
138 depends on OMAP_IOMMU
140 config OMAP_IOMMU_DEBUG
141 tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
142 depends on OMAP_IOVMM && DEBUG_FS
144 Select this to see extensive information about
145 the internal state of OMAP IOMMU/IOVMM in debugfs.
147 Say N unless you know you need this.
149 config TEGRA_IOMMU_GART
150 bool "Tegra GART IOMMU Support"
151 depends on ARCH_TEGRA_2x_SOC
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.
159 config TEGRA_IOMMU_SMMU
160 bool "Tegra SMMU IOMMU Support"
161 depends on ARCH_TEGRA && TEGRA_AHB
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.
170 bool "Exynos IOMMU Support"
171 depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
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
179 If unsure, say N here.
181 config EXYNOS_IOMMU_DEBUG
182 bool "Debugging log for Exynos IOMMU"
183 depends on EXYNOS_IOMMU
185 Select this to see the detailed log message that shows what
186 happens in the IOMMU driver
188 Say N unless you need kernel log message for IOMMU debugging
190 config SHMOBILE_IPMMU
193 config SHMOBILE_IPMMU_TLB
196 config SHMOBILE_IOMMU
197 bool "IOMMU for Renesas IPMMU/IPMMUI"
199 depends on (ARM && ARCH_SHMOBILE)
201 select ARM_DMA_USE_IOMMU
202 select SHMOBILE_IPMMU
203 select SHMOBILE_IPMMU_TLB
205 Support for Renesas IPMMU/IPMMUI. This option enables
206 remapping of DMA memory accesses from all of the IP blocks
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
217 prompt "IPMMU/IPMMUI address space size"
218 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
219 depends on SHMOBILE_IOMMU
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:
225 page table size = number of page table entries * 4 bytes
226 number of page table entries = address space size / 1 MiB
228 For example, when the address space size is 2048 MiB, the
229 1st level page table size is 8192 bytes.
231 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
234 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
237 config SHMOBILE_IOMMU_ADDRSIZE_512MB
240 config SHMOBILE_IOMMU_ADDRSIZE_256MB
243 config SHMOBILE_IOMMU_ADDRSIZE_128MB
246 config SHMOBILE_IOMMU_ADDRSIZE_64MB
249 config SHMOBILE_IOMMU_ADDRSIZE_32MB
254 config SHMOBILE_IOMMU_L1SIZE
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
264 config SPAPR_TCE_IOMMU
265 bool "sPAPR TCE IOMMU Support"
266 depends on PPC_POWERNV || PPC_PSERIES
269 Enables bits of IOMMU API required by VFIO. The iommu_ops
270 is not implemented as it is not necessary for VFIO.
273 bool "ARM Ltd. System MMU (SMMU) Support"
274 depends on ARM64 || (ARM_LPAE && OF)
276 select ARM_DMA_USE_IOMMU if ARM
278 Support for implementations of the ARM System MMU architecture
279 versions 1 and 2. The driver supports both v7l and v8l table
280 formats with 4k and 64k page sizes.
282 Say Y here if your SoC includes an IOMMU device implementing
283 the ARM SMMU architecture.
285 endif # IOMMU_SUPPORT