1 # IOMMU_API always gets selected by whoever wants it.
5 menuconfig IOMMU_SUPPORT
6 bool "IOMMU Hardware Support"
10 Say Y here if you want to compile device drivers for IO Memory
11 Management Units into the kernel. These devices usually allow to
12 remap DMA requests and/or remap interrupts from other devices on the
17 menu "Generic IOMMU Pagetable Support"
19 # Selected by the actual pagetable implementations
20 config IOMMU_IO_PGTABLE
23 config IOMMU_IO_PGTABLE_LPAE
24 bool "ARMv7/v8 Long Descriptor Format"
25 select IOMMU_IO_PGTABLE
26 depends on HAS_DMA && (ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64))
28 Enable support for the ARM long descriptor pagetable format.
29 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
30 sizes at both stage-1 and stage-2, as well as address spaces
31 up to 48-bits in size.
33 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
35 depends on IOMMU_IO_PGTABLE_LPAE
37 Enable self-tests for LPAE page table allocator. This performs
38 a series of page-table consistency checks during boot.
40 If unsure, say N here.
42 config IOMMU_IO_PGTABLE_ARMV7S
43 bool "ARMv7/v8 Short Descriptor Format"
44 select IOMMU_IO_PGTABLE
45 depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST)
47 Enable support for the ARM Short-descriptor pagetable format.
48 This supports 32-bit virtual and physical addresses mapped using
49 2-level tables with 4KB pages/1MB sections, and contiguous entries
50 for 64KB pages/16MB supersections if indicated by the IOMMU driver.
52 config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
53 bool "ARMv7s selftests"
54 depends on IOMMU_IO_PGTABLE_ARMV7S
56 Enable self-tests for ARMv7s page table allocator. This performs
57 a series of page-table consistency checks during boot.
59 If unsure, say N here.
68 depends on OF && IOMMU_API
70 # IOMMU-agnostic DMA-mapping layer
75 select NEED_SG_DMA_LENGTH
78 bool "Freescale IOMMU support"
81 depends on PPC_E500MC || (COMPILE_TEST && PPC)
83 select GENERIC_ALLOCATOR
85 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
86 PAMU can authorize memory access, remap the memory address, and remap I/O
91 bool "MSM IOMMU Support"
93 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
95 select IOMMU_IO_PGTABLE_ARMV7S
97 Support for the IOMMUs found on certain Qualcomm SOCs.
98 These IOMMUs allow virtualization of the address space used by most
99 cores within the multimedia subsystem.
101 If unsure, say N here.
103 config IOMMU_PGTABLES_L2
105 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
109 bool "AMD IOMMU support"
117 depends on X86_64 && PCI && ACPI
119 With this option you can enable support for AMD IOMMU hardware in
120 your system. An IOMMU is a hardware component which provides
121 remapping of DMA memory accesses from devices. With an AMD IOMMU you
122 can isolate the DMA memory of different devices and protect the
123 system from misbehaving device drivers or hardware.
125 You can find out if your system has an AMD IOMMU if you look into
126 your BIOS for an option to enable it or if you have an IVRS ACPI
130 tristate "AMD IOMMU Version 2 driver"
134 This option enables support for the AMD IOMMUv2 features of the IOMMU
135 hardware. Select this option if you want to use devices that support
136 the PCI PRI and PASID interface.
138 # Intel IOMMU support
143 bool "Support for Intel IOMMU using DMA Remapping Devices"
144 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
149 DMA remapping (DMAR) devices support enables independent address
150 translations for Direct Memory Access (DMA) from devices.
151 These DMA remapping devices are reported via ACPI tables
152 and include PCI device scope covered by these DMA
155 config INTEL_IOMMU_SVM
156 bool "Support for Shared Virtual Memory with Intel IOMMU"
157 depends on INTEL_IOMMU && X86
161 Shared Virtual Memory (SVM) provides a facility for devices
162 to access DMA resources through process address space by
163 means of a Process Address Space ID (PASID).
165 config INTEL_IOMMU_DEFAULT_ON
167 prompt "Enable Intel DMA Remapping Devices by default"
168 depends on INTEL_IOMMU
170 Selecting this option will enable a DMAR device at boot time if
171 one is found. If this option is not selected, DMAR support can
172 be enabled by passing intel_iommu=on to the kernel.
174 config INTEL_IOMMU_BROKEN_GFX_WA
175 bool "Workaround broken graphics drivers (going away soon)"
176 depends on INTEL_IOMMU && BROKEN && X86
178 Current Graphics drivers tend to use physical address
179 for DMA and avoid using DMA APIs. Setting this config
180 option permits the IOMMU driver to set a unity map for
181 all the OS-visible memory. Hence the driver can continue
182 to use physical addresses for DMA, at least until this
183 option is removed in the 2.6.32 kernel.
185 config INTEL_IOMMU_FLOPPY_WA
187 depends on INTEL_IOMMU && X86
189 Floppy disk drivers are known to bypass DMA API calls
190 thereby failing to work when IOMMU is enabled. This
191 workaround will setup a 1:1 mapping for the first
192 16MiB to make floppy (an ISA device) work.
195 bool "Support for Interrupt Remapping"
196 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
199 Supports Interrupt remapping for IO-APIC and MSI devices.
200 To use x2apic mode in the CPU's which support x2APIC enhancements or
201 to support platforms with CPU's having > 8 bit APIC ID, say Y.
205 bool "OMAP IOMMU Support"
206 depends on ARM && MMU
207 depends on ARCH_OMAP2PLUS || COMPILE_TEST
210 The OMAP3 media platform drivers depend on iommu support,
211 if you need them say Y here.
213 config OMAP_IOMMU_DEBUG
214 bool "Export OMAP IOMMU internals in DebugFS"
215 depends on OMAP_IOMMU && DEBUG_FS
217 Select this to see extensive information about
218 the internal state of OMAP IOMMU in debugfs.
220 Say N unless you know you need this.
222 config ROCKCHIP_IOMMU
223 bool "Rockchip IOMMU Support"
224 depends on ARM || ARM64
225 depends on ARCH_ROCKCHIP || COMPILE_TEST
227 select ARM_DMA_USE_IOMMU
229 Support for IOMMUs found on Rockchip rk32xx SOCs.
230 These IOMMUs allow virtualization of the address space used by most
231 cores within the multimedia subsystem.
232 Say Y here if you are using a Rockchip SoC that includes an IOMMU
235 config TEGRA_IOMMU_GART
236 bool "Tegra GART IOMMU Support"
237 depends on ARCH_TEGRA_2x_SOC
240 Enables support for remapping discontiguous physical memory
241 shared with the operating system into contiguous I/O virtual
242 space through the GART (Graphics Address Relocation Table)
243 hardware included on Tegra SoCs.
245 config TEGRA_IOMMU_SMMU
246 bool "NVIDIA Tegra SMMU Support"
247 depends on ARCH_TEGRA
252 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
253 SoCs (Tegra30 up to Tegra210).
256 bool "Exynos IOMMU Support"
257 depends on ARCH_EXYNOS && MMU
258 depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
260 select ARM_DMA_USE_IOMMU
262 Support for the IOMMU (System MMU) of Samsung Exynos application
263 processor family. This enables H/W multimedia accelerators to see
264 non-linear physical memory chunks as linear memory in their
267 If unsure, say N here.
269 config EXYNOS_IOMMU_DEBUG
270 bool "Debugging log for Exynos IOMMU"
271 depends on EXYNOS_IOMMU
273 Select this to see the detailed log message that shows what
274 happens in the IOMMU driver.
276 Say N unless you need kernel log message for IOMMU debugging.
279 bool "Renesas VMSA-compatible IPMMU"
280 depends on ARM || IOMMU_DMA
281 depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
283 select IOMMU_IO_PGTABLE_LPAE
284 select ARM_DMA_USE_IOMMU
286 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
287 R-Mobile APE6 and R-Car H2/M2 SoCs.
291 config SPAPR_TCE_IOMMU
292 bool "sPAPR TCE IOMMU Support"
293 depends on PPC_POWERNV || PPC_PSERIES
296 Enables bits of IOMMU API required by VFIO. The iommu_ops
297 is not implemented as it is not necessary for VFIO.
301 bool "ARM Ltd. System MMU (SMMU) Support"
302 depends on (ARM64 || ARM) && MMU
304 select IOMMU_IO_PGTABLE_LPAE
305 select ARM_DMA_USE_IOMMU if ARM
307 Support for implementations of the ARM System MMU architecture
310 Say Y here if your SoC includes an IOMMU device implementing
311 the ARM SMMU architecture.
314 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
317 select IOMMU_IO_PGTABLE_LPAE
318 select GENERIC_MSI_IRQ_DOMAIN
320 Support for implementations of the ARM System MMU architecture
321 version 3 providing translation support to a PCIe root complex.
323 Say Y here if your system includes an IOMMU device implementing
324 the ARM SMMUv3 architecture.
327 def_bool y if S390 && PCI
328 depends on S390 && PCI
331 Support for the IOMMU API for s390 PCI devices.
333 config S390_CCW_IOMMU
334 bool "S390 CCW IOMMU Support"
335 depends on S390 && CCW
338 Enables bits of IOMMU API required by VFIO. The iommu_ops
339 is not implemented as it is not necessary for VFIO.
342 bool "MTK IOMMU Support"
343 depends on ARM || ARM64
344 depends on ARCH_MEDIATEK || COMPILE_TEST
345 select ARM_DMA_USE_IOMMU
348 select IOMMU_IO_PGTABLE_ARMV7S
352 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
353 Memory Management Unit. This option enables remapping of DMA memory
354 accesses for the multimedia subsystem.
356 If unsure, say N here.
359 bool "MTK IOMMU Version 1 (M4U gen1) Support"
361 depends on ARCH_MEDIATEK || COMPILE_TEST
362 select ARM_DMA_USE_IOMMU
367 Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
368 Multimedia Memory Managememt Unit. This option enables remapping of
369 DMA memory accesses for the multimedia subsystem.
371 if unsure, say N here.
374 # Note: iommu drivers cannot (yet?) be built as modules
375 bool "Qualcomm IOMMU Support"
376 depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
379 select IOMMU_IO_PGTABLE_LPAE
380 select ARM_DMA_USE_IOMMU
382 Support for IOMMU on certain Qualcomm SoCs.
384 endif # IOMMU_SUPPORT