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
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"
114 depends on X86_64 && PCI && ACPI
116 With this option you can enable support for AMD IOMMU hardware in
117 your system. An IOMMU is a hardware component which provides
118 remapping of DMA memory accesses from devices. With an AMD IOMMU you
119 can isolate the DMA memory of different devices and protect the
120 system from misbehaving device drivers or hardware.
122 You can find out if your system has an AMD IOMMU if you look into
123 your BIOS for an option to enable it or if you have an IVRS ACPI
127 tristate "AMD IOMMU Version 2 driver"
131 This option enables support for the AMD IOMMUv2 features of the IOMMU
132 hardware. Select this option if you want to use devices that support
133 the PCI PRI and PASID interface.
135 # Intel IOMMU support
140 bool "Support for Intel IOMMU using DMA Remapping Devices"
141 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
146 DMA remapping (DMAR) devices support enables independent address
147 translations for Direct Memory Access (DMA) from devices.
148 These DMA remapping devices are reported via ACPI tables
149 and include PCI device scope covered by these DMA
152 config INTEL_IOMMU_SVM
153 bool "Support for Shared Virtual Memory with Intel IOMMU"
154 depends on INTEL_IOMMU && X86
158 Shared Virtual Memory (SVM) provides a facility for devices
159 to access DMA resources through process address space by
160 means of a Process Address Space ID (PASID).
162 config INTEL_IOMMU_DEFAULT_ON
164 prompt "Enable Intel DMA Remapping Devices by default"
165 depends on INTEL_IOMMU
167 Selecting this option will enable a DMAR device at boot time if
168 one is found. If this option is not selected, DMAR support can
169 be enabled by passing intel_iommu=on to the kernel.
171 config INTEL_IOMMU_BROKEN_GFX_WA
172 bool "Workaround broken graphics drivers (going away soon)"
173 depends on INTEL_IOMMU && BROKEN && X86
175 Current Graphics drivers tend to use physical address
176 for DMA and avoid using DMA APIs. Setting this config
177 option permits the IOMMU driver to set a unity map for
178 all the OS-visible memory. Hence the driver can continue
179 to use physical addresses for DMA, at least until this
180 option is removed in the 2.6.32 kernel.
182 config INTEL_IOMMU_FLOPPY_WA
184 depends on INTEL_IOMMU && X86
186 Floppy disk drivers are known to bypass DMA API calls
187 thereby failing to work when IOMMU is enabled. This
188 workaround will setup a 1:1 mapping for the first
189 16MiB to make floppy (an ISA device) work.
192 bool "Support for Interrupt Remapping"
193 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
196 Supports Interrupt remapping for IO-APIC and MSI devices.
197 To use x2apic mode in the CPU's which support x2APIC enhancements or
198 to support platforms with CPU's having > 8 bit APIC ID, say Y.
202 bool "OMAP IOMMU Support"
203 depends on ARM && MMU
204 depends on ARCH_OMAP2PLUS || COMPILE_TEST
207 The OMAP3 media platform drivers depend on iommu support,
208 if you need them say Y here.
210 config OMAP_IOMMU_DEBUG
211 bool "Export OMAP IOMMU internals in DebugFS"
212 depends on OMAP_IOMMU && DEBUG_FS
214 Select this to see extensive information about
215 the internal state of OMAP IOMMU in debugfs.
217 Say N unless you know you need this.
219 config ROCKCHIP_IOMMU
220 bool "Rockchip IOMMU Support"
222 depends on ARCH_ROCKCHIP || COMPILE_TEST
224 select ARM_DMA_USE_IOMMU
226 Support for IOMMUs found on Rockchip rk32xx SOCs.
227 These IOMMUs allow virtualization of the address space used by most
228 cores within the multimedia subsystem.
229 Say Y here if you are using a Rockchip SoC that includes an IOMMU
232 config TEGRA_IOMMU_GART
233 bool "Tegra GART IOMMU Support"
234 depends on ARCH_TEGRA_2x_SOC
237 Enables support for remapping discontiguous physical memory
238 shared with the operating system into contiguous I/O virtual
239 space through the GART (Graphics Address Relocation Table)
240 hardware included on Tegra SoCs.
242 config TEGRA_IOMMU_SMMU
243 bool "NVIDIA Tegra SMMU Support"
244 depends on ARCH_TEGRA
249 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
250 SoCs (Tegra30 up to Tegra210).
253 bool "Exynos IOMMU Support"
254 depends on ARCH_EXYNOS && MMU
256 select ARM_DMA_USE_IOMMU
258 Support for the IOMMU (System MMU) of Samsung Exynos application
259 processor family. This enables H/W multimedia accelerators to see
260 non-linear physical memory chunks as linear memory in their
263 If unsure, say N here.
265 config EXYNOS_IOMMU_DEBUG
266 bool "Debugging log for Exynos IOMMU"
267 depends on EXYNOS_IOMMU
269 Select this to see the detailed log message that shows what
270 happens in the IOMMU driver.
272 Say N unless you need kernel log message for IOMMU debugging.
275 bool "Renesas VMSA-compatible IPMMU"
277 depends on ARCH_RENESAS || COMPILE_TEST
279 select IOMMU_IO_PGTABLE_LPAE
280 select ARM_DMA_USE_IOMMU
282 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
283 R-Mobile APE6 and R-Car H2/M2 SoCs.
287 config SPAPR_TCE_IOMMU
288 bool "sPAPR TCE IOMMU Support"
289 depends on PPC_POWERNV || PPC_PSERIES
292 Enables bits of IOMMU API required by VFIO. The iommu_ops
293 is not implemented as it is not necessary for VFIO.
297 bool "ARM Ltd. System MMU (SMMU) Support"
298 depends on (ARM64 || ARM) && MMU
300 select IOMMU_IO_PGTABLE_LPAE
301 select ARM_DMA_USE_IOMMU if ARM
303 Support for implementations of the ARM System MMU architecture
306 Say Y here if your SoC includes an IOMMU device implementing
307 the ARM SMMU architecture.
310 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
311 depends on ARM64 && PCI
313 select IOMMU_IO_PGTABLE_LPAE
314 select GENERIC_MSI_IRQ_DOMAIN
316 Support for implementations of the ARM System MMU architecture
317 version 3 providing translation support to a PCIe root complex.
319 Say Y here if your system includes an IOMMU device implementing
320 the ARM SMMUv3 architecture.
323 def_bool y if S390 && PCI
324 depends on S390 && PCI
327 Support for the IOMMU API for s390 PCI devices.
330 bool "MTK IOMMU Support"
331 depends on ARM || ARM64
332 depends on ARCH_MEDIATEK || COMPILE_TEST
333 select ARM_DMA_USE_IOMMU
336 select IOMMU_IO_PGTABLE_ARMV7S
340 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
341 Memory Management Unit. This option enables remapping of DMA memory
342 accesses for the multimedia subsystem.
344 If unsure, say N here.
346 endif # IOMMU_SUPPORT