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)
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"
79 depends on PPC_E500MC || (COMPILE_TEST && PPC)
81 select GENERIC_ALLOCATOR
83 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
84 PAMU can authorize memory access, remap the memory address, and remap I/O
89 bool "MSM IOMMU Support"
91 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
93 select IOMMU_IO_PGTABLE_ARMV7S
95 Support for the IOMMUs found on certain Qualcomm SOCs.
96 These IOMMUs allow virtualization of the address space used by most
97 cores within the multimedia subsystem.
99 If unsure, say N here.
101 config IOMMU_PGTABLES_L2
103 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
107 bool "AMD IOMMU support"
115 depends on X86_64 && PCI && ACPI
117 With this option you can enable support for AMD IOMMU hardware in
118 your system. An IOMMU is a hardware component which provides
119 remapping of DMA memory accesses from devices. With an AMD IOMMU you
120 can isolate the DMA memory of different devices and protect the
121 system from misbehaving device drivers or hardware.
123 You can find out if your system has an AMD IOMMU if you look into
124 your BIOS for an option to enable it or if you have an IVRS ACPI
128 tristate "AMD IOMMU Version 2 driver"
132 This option enables support for the AMD IOMMUv2 features of the IOMMU
133 hardware. Select this option if you want to use devices that support
134 the PCI PRI and PASID interface.
136 # Intel IOMMU support
141 bool "Support for Intel IOMMU using DMA Remapping Devices"
142 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
147 DMA remapping (DMAR) devices support enables independent address
148 translations for Direct Memory Access (DMA) from devices.
149 These DMA remapping devices are reported via ACPI tables
150 and include PCI device scope covered by these DMA
153 config INTEL_IOMMU_SVM
154 bool "Support for Shared Virtual Memory with Intel IOMMU"
155 depends on INTEL_IOMMU && X86
159 Shared Virtual Memory (SVM) provides a facility for devices
160 to access DMA resources through process address space by
161 means of a Process Address Space ID (PASID).
163 config INTEL_IOMMU_DEFAULT_ON
165 prompt "Enable Intel DMA Remapping Devices by default"
166 depends on INTEL_IOMMU
168 Selecting this option will enable a DMAR device at boot time if
169 one is found. If this option is not selected, DMAR support can
170 be enabled by passing intel_iommu=on to the kernel.
172 config INTEL_IOMMU_BROKEN_GFX_WA
173 bool "Workaround broken graphics drivers (going away soon)"
174 depends on INTEL_IOMMU && BROKEN && X86
176 Current Graphics drivers tend to use physical address
177 for DMA and avoid using DMA APIs. Setting this config
178 option permits the IOMMU driver to set a unity map for
179 all the OS-visible memory. Hence the driver can continue
180 to use physical addresses for DMA, at least until this
181 option is removed in the 2.6.32 kernel.
183 config INTEL_IOMMU_FLOPPY_WA
185 depends on INTEL_IOMMU && X86
187 Floppy disk drivers are known to bypass DMA API calls
188 thereby failing to work when IOMMU is enabled. This
189 workaround will setup a 1:1 mapping for the first
190 16MiB to make floppy (an ISA device) work.
193 bool "Support for Interrupt Remapping"
194 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
197 Supports Interrupt remapping for IO-APIC and MSI devices.
198 To use x2apic mode in the CPU's which support x2APIC enhancements or
199 to support platforms with CPU's having > 8 bit APIC ID, say Y.
203 bool "OMAP IOMMU Support"
204 depends on ARM && MMU
205 depends on ARCH_OMAP2PLUS || COMPILE_TEST
208 The OMAP3 media platform drivers depend on iommu support,
209 if you need them say Y here.
211 config OMAP_IOMMU_DEBUG
212 bool "Export OMAP IOMMU internals in DebugFS"
213 depends on OMAP_IOMMU && DEBUG_FS
215 Select this to see extensive information about
216 the internal state of OMAP IOMMU in debugfs.
218 Say N unless you know you need this.
220 config ROCKCHIP_IOMMU
221 bool "Rockchip IOMMU Support"
223 depends on ARCH_ROCKCHIP || COMPILE_TEST
225 select ARM_DMA_USE_IOMMU
227 Support for IOMMUs found on Rockchip rk32xx SOCs.
228 These IOMMUs allow virtualization of the address space used by most
229 cores within the multimedia subsystem.
230 Say Y here if you are using a Rockchip SoC that includes an IOMMU
233 config TEGRA_IOMMU_GART
234 bool "Tegra GART IOMMU Support"
235 depends on ARCH_TEGRA_2x_SOC
238 Enables support for remapping discontiguous physical memory
239 shared with the operating system into contiguous I/O virtual
240 space through the GART (Graphics Address Relocation Table)
241 hardware included on Tegra SoCs.
243 config TEGRA_IOMMU_SMMU
244 bool "NVIDIA Tegra SMMU Support"
245 depends on ARCH_TEGRA
250 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
251 SoCs (Tegra30 up to Tegra210).
254 bool "Exynos IOMMU Support"
255 depends on ARCH_EXYNOS && MMU
257 select ARM_DMA_USE_IOMMU
259 Support for the IOMMU (System MMU) of Samsung Exynos application
260 processor family. This enables H/W multimedia accelerators to see
261 non-linear physical memory chunks as linear memory in their
264 If unsure, say N here.
266 config EXYNOS_IOMMU_DEBUG
267 bool "Debugging log for Exynos IOMMU"
268 depends on EXYNOS_IOMMU
270 Select this to see the detailed log message that shows what
271 happens in the IOMMU driver.
273 Say N unless you need kernel log message for IOMMU debugging.
276 bool "Renesas VMSA-compatible IPMMU"
278 depends on ARCH_RENESAS || COMPILE_TEST
280 select IOMMU_IO_PGTABLE_LPAE
281 select ARM_DMA_USE_IOMMU
283 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
284 R-Mobile APE6 and R-Car H2/M2 SoCs.
288 config SPAPR_TCE_IOMMU
289 bool "sPAPR TCE IOMMU Support"
290 depends on PPC_POWERNV || PPC_PSERIES
293 Enables bits of IOMMU API required by VFIO. The iommu_ops
294 is not implemented as it is not necessary for VFIO.
298 bool "ARM Ltd. System MMU (SMMU) Support"
299 depends on (ARM64 || ARM) && MMU
301 select IOMMU_IO_PGTABLE_LPAE
302 select ARM_DMA_USE_IOMMU if ARM
304 Support for implementations of the ARM System MMU architecture
307 Say Y here if your SoC includes an IOMMU device implementing
308 the ARM SMMU architecture.
311 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
314 select IOMMU_IO_PGTABLE_LPAE
315 select GENERIC_MSI_IRQ_DOMAIN
317 Support for implementations of the ARM System MMU architecture
318 version 3 providing translation support to a PCIe root complex.
320 Say Y here if your system includes an IOMMU device implementing
321 the ARM SMMUv3 architecture.
324 def_bool y if S390 && PCI
325 depends on S390 && PCI
328 Support for the IOMMU API for s390 PCI devices.
330 config S390_CCW_IOMMU
331 bool "S390 CCW IOMMU Support"
332 depends on S390 && CCW
335 Enables bits of IOMMU API required by VFIO. The iommu_ops
336 is not implemented as it is not necessary for VFIO.
339 bool "MTK IOMMU Support"
340 depends on ARM || ARM64
341 depends on ARCH_MEDIATEK || COMPILE_TEST
342 select ARM_DMA_USE_IOMMU
345 select IOMMU_IO_PGTABLE_ARMV7S
349 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
350 Memory Management Unit. This option enables remapping of DMA memory
351 accesses for the multimedia subsystem.
353 If unsure, say N here.
356 bool "MTK IOMMU Version 1 (M4U gen1) Support"
358 depends on ARCH_MEDIATEK || COMPILE_TEST
359 select ARM_DMA_USE_IOMMU
364 Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
365 Multimedia Memory Managememt Unit. This option enables remapping of
366 DMA memory accesses for the multimedia subsystem.
368 if unsure, say N here.
370 endif # IOMMU_SUPPORT