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
21 bool "Freescale IOMMU support"
24 select GENERIC_ALLOCATOR
26 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
27 PAMU can authorize memory access, remap the memory address, and remap I/O
32 bool "MSM IOMMU Support"
33 depends on ARCH_MSM8X60 || ARCH_MSM8960
36 Support for the IOMMUs found on certain Qualcomm SOCs.
37 These IOMMUs allow virtualization of the address space used by most
38 cores within the multimedia subsystem.
40 If unsure, say N here.
42 config IOMMU_PGTABLES_L2
44 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
48 bool "AMD IOMMU support"
55 depends on X86_64 && PCI && ACPI
57 With this option you can enable support for AMD IOMMU hardware in
58 your system. An IOMMU is a hardware component which provides
59 remapping of DMA memory accesses from devices. With an AMD IOMMU you
60 can isolate the DMA memory of different devices and protect the
61 system from misbehaving device drivers or hardware.
63 You can find out if your system has an AMD IOMMU if you look into
64 your BIOS for an option to enable it or if you have an IVRS ACPI
67 config AMD_IOMMU_STATS
68 bool "Export AMD IOMMU statistics to debugfs"
72 This option enables code in the AMD IOMMU driver to collect various
73 statistics about whats happening in the driver and exports that
74 information to userspace via debugfs.
78 tristate "AMD IOMMU Version 2 driver"
82 This option enables support for the AMD IOMMUv2 features of the IOMMU
83 hardware. Select this option if you want to use devices that support
84 the PCI PRI and PASID interface.
91 bool "Support for Intel IOMMU using DMA Remapping Devices"
92 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
96 DMA remapping (DMAR) devices support enables independent address
97 translations for Direct Memory Access (DMA) from devices.
98 These DMA remapping devices are reported via ACPI tables
99 and include PCI device scope covered by these DMA
102 config INTEL_IOMMU_DEFAULT_ON
104 prompt "Enable Intel DMA Remapping Devices by default"
105 depends on INTEL_IOMMU
107 Selecting this option will enable a DMAR device at boot time if
108 one is found. If this option is not selected, DMAR support can
109 be enabled by passing intel_iommu=on to the kernel.
111 config INTEL_IOMMU_BROKEN_GFX_WA
112 bool "Workaround broken graphics drivers (going away soon)"
113 depends on INTEL_IOMMU && BROKEN && X86
115 Current Graphics drivers tend to use physical address
116 for DMA and avoid using DMA APIs. Setting this config
117 option permits the IOMMU driver to set a unity map for
118 all the OS-visible memory. Hence the driver can continue
119 to use physical addresses for DMA, at least until this
120 option is removed in the 2.6.32 kernel.
122 config INTEL_IOMMU_FLOPPY_WA
124 depends on INTEL_IOMMU && X86
126 Floppy disk drivers are known to bypass DMA API calls
127 thereby failing to work when IOMMU is enabled. This
128 workaround will setup a 1:1 mapping for the first
129 16MiB to make floppy (an ISA device) work.
132 bool "Support for Interrupt Remapping"
133 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
136 Supports Interrupt remapping for IO-APIC and MSI devices.
137 To use x2apic mode in the CPU's which support x2APIC enhancements or
138 to support platforms with CPU's having > 8 bit APIC ID, say Y.
142 bool "OMAP IOMMU Support"
143 depends on ARCH_OMAP2PLUS
146 config OMAP_IOMMU_DEBUG
147 tristate "Export OMAP IOMMU internals in DebugFS"
148 depends on OMAP_IOMMU && DEBUG_FS
150 Select this to see extensive information about
151 the internal state of OMAP IOMMU in debugfs.
153 Say N unless you know you need this.
155 config ROCKCHIP_IOMMU
156 bool "Rockchip IOMMU Support"
157 depends on ARCH_ROCKCHIP
159 select ARM_DMA_USE_IOMMU
161 Support for IOMMUs found on Rockchip rk32xx SOCs.
162 These IOMMUs allow virtualization of the address space used by most
163 cores within the multimedia subsystem.
164 Say Y here if you are using a Rockchip SoC that includes an IOMMU
167 config TEGRA_IOMMU_GART
168 bool "Tegra GART IOMMU Support"
169 depends on ARCH_TEGRA_2x_SOC
172 Enables support for remapping discontiguous physical memory
173 shared with the operating system into contiguous I/O virtual
174 space through the GART (Graphics Address Relocation Table)
175 hardware included on Tegra SoCs.
177 config TEGRA_IOMMU_SMMU
178 bool "Tegra SMMU IOMMU Support"
179 depends on ARCH_TEGRA && TEGRA_AHB
182 Enables support for remapping discontiguous physical memory
183 shared with the operating system into contiguous I/O virtual
184 space through the SMMU (System Memory Management Unit)
185 hardware included on Tegra SoCs.
188 bool "Exynos IOMMU Support"
189 depends on ARCH_EXYNOS
191 select ARM_DMA_USE_IOMMU
193 Support for the IOMMU (System MMU) of Samsung Exynos application
194 processor family. This enables H/W multimedia accelerators to see
195 non-linear physical memory chunks as linear memory in their
198 If unsure, say N here.
200 config EXYNOS_IOMMU_DEBUG
201 bool "Debugging log for Exynos IOMMU"
202 depends on EXYNOS_IOMMU
204 Select this to see the detailed log message that shows what
205 happens in the IOMMU driver.
207 Say N unless you need kernel log message for IOMMU debugging.
209 config SHMOBILE_IPMMU
212 config SHMOBILE_IPMMU_TLB
215 config SHMOBILE_IOMMU
216 bool "IOMMU for Renesas IPMMU/IPMMUI"
219 depends on ARCH_SHMOBILE || COMPILE_TEST
221 select ARM_DMA_USE_IOMMU
222 select SHMOBILE_IPMMU
223 select SHMOBILE_IPMMU_TLB
225 Support for Renesas IPMMU/IPMMUI. This option enables
226 remapping of DMA memory accesses from all of the IP blocks
229 Warning: Drivers (including userspace drivers of UIO
230 devices) of the IP blocks on the ICB *must* use addresses
231 allocated from the IPMMU (iova) for DMA with this option
237 prompt "IPMMU/IPMMUI address space size"
238 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
239 depends on SHMOBILE_IOMMU
241 This option sets IPMMU/IPMMUI address space size by
242 adjusting the 1st level page table size. The page table size
243 is calculated as follows:
245 page table size = number of page table entries * 4 bytes
246 number of page table entries = address space size / 1 MiB
248 For example, when the address space size is 2048 MiB, the
249 1st level page table size is 8192 bytes.
251 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
254 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
257 config SHMOBILE_IOMMU_ADDRSIZE_512MB
260 config SHMOBILE_IOMMU_ADDRSIZE_256MB
263 config SHMOBILE_IOMMU_ADDRSIZE_128MB
266 config SHMOBILE_IOMMU_ADDRSIZE_64MB
269 config SHMOBILE_IOMMU_ADDRSIZE_32MB
274 config SHMOBILE_IOMMU_L1SIZE
276 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
277 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
278 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
279 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
280 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
281 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
282 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
285 bool "Renesas VMSA-compatible IPMMU"
287 depends on ARCH_SHMOBILE || COMPILE_TEST
289 select ARM_DMA_USE_IOMMU
291 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
292 R-Mobile APE6 and R-Car H2/M2 SoCs.
296 config SPAPR_TCE_IOMMU
297 bool "sPAPR TCE IOMMU Support"
298 depends on PPC_POWERNV || PPC_PSERIES
301 Enables bits of IOMMU API required by VFIO. The iommu_ops
302 is not implemented as it is not necessary for VFIO.
305 bool "ARM Ltd. System MMU (SMMU) Support"
306 depends on ARM64 || (ARM_LPAE && OF)
308 select ARM_DMA_USE_IOMMU if ARM
310 Support for implementations of the ARM System MMU architecture
311 versions 1 and 2. The driver supports both v7l and v8l table
312 formats with 4k and 64k page sizes.
314 Say Y here if your SoC includes an IOMMU device implementing
315 the ARM SMMU architecture.
317 endif # IOMMU_SUPPORT