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"
80 depends on PPC_E500MC || COMPILE_TEST
82 select GENERIC_ALLOCATOR
84 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
85 PAMU can authorize memory access, remap the memory address, and remap I/O
90 bool "MSM IOMMU Support"
92 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
96 Support for the IOMMUs found on certain Qualcomm SOCs.
97 These IOMMUs allow virtualization of the address space used by most
98 cores within the multimedia subsystem.
100 If unsure, say N here.
102 config IOMMU_PGTABLES_L2
104 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
108 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
127 config AMD_IOMMU_STATS
128 bool "Export AMD IOMMU statistics to debugfs"
132 This option enables code in the AMD IOMMU driver to collect various
133 statistics about whats happening in the driver and exports that
134 information to userspace via debugfs.
138 tristate "AMD IOMMU Version 2 driver"
142 This option enables support for the AMD IOMMUv2 features of the IOMMU
143 hardware. Select this option if you want to use devices that support
144 the PCI PRI and PASID interface.
146 # Intel IOMMU support
151 bool "Support for Intel IOMMU using DMA Remapping Devices"
152 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
157 DMA remapping (DMAR) devices support enables independent address
158 translations for Direct Memory Access (DMA) from devices.
159 These DMA remapping devices are reported via ACPI tables
160 and include PCI device scope covered by these DMA
163 config INTEL_IOMMU_SVM
164 bool "Support for Shared Virtual Memory with Intel IOMMU"
165 depends on INTEL_IOMMU && X86
169 Shared Virtual Memory (SVM) provides a facility for devices
170 to access DMA resources through process address space by
171 means of a Process Address Space ID (PASID).
173 config INTEL_IOMMU_DEFAULT_ON
175 prompt "Enable Intel DMA Remapping Devices by default"
176 depends on INTEL_IOMMU
178 Selecting this option will enable a DMAR device at boot time if
179 one is found. If this option is not selected, DMAR support can
180 be enabled by passing intel_iommu=on to the kernel.
182 config INTEL_IOMMU_BROKEN_GFX_WA
183 bool "Workaround broken graphics drivers (going away soon)"
184 depends on INTEL_IOMMU && BROKEN && X86
186 Current Graphics drivers tend to use physical address
187 for DMA and avoid using DMA APIs. Setting this config
188 option permits the IOMMU driver to set a unity map for
189 all the OS-visible memory. Hence the driver can continue
190 to use physical addresses for DMA, at least until this
191 option is removed in the 2.6.32 kernel.
193 config INTEL_IOMMU_FLOPPY_WA
195 depends on INTEL_IOMMU && X86
197 Floppy disk drivers are known to bypass DMA API calls
198 thereby failing to work when IOMMU is enabled. This
199 workaround will setup a 1:1 mapping for the first
200 16MiB to make floppy (an ISA device) work.
203 bool "Support for Interrupt Remapping"
204 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
207 Supports Interrupt remapping for IO-APIC and MSI devices.
208 To use x2apic mode in the CPU's which support x2APIC enhancements or
209 to support platforms with CPU's having > 8 bit APIC ID, say Y.
213 bool "OMAP IOMMU Support"
214 depends on ARM && MMU
215 depends on ARCH_OMAP2PLUS || COMPILE_TEST
218 The OMAP3 media platform drivers depend on iommu support,
219 if you need them say Y here.
221 config OMAP_IOMMU_DEBUG
222 bool "Export OMAP IOMMU internals in DebugFS"
223 depends on OMAP_IOMMU && DEBUG_FS
225 Select this to see extensive information about
226 the internal state of OMAP IOMMU in debugfs.
228 Say N unless you know you need this.
230 config ROCKCHIP_IOMMU
231 bool "Rockchip IOMMU Support"
233 depends on ARCH_ROCKCHIP || COMPILE_TEST
235 select ARM_DMA_USE_IOMMU
237 Support for IOMMUs found on Rockchip rk32xx SOCs.
238 These IOMMUs allow virtualization of the address space used by most
239 cores within the multimedia subsystem.
240 Say Y here if you are using a Rockchip SoC that includes an IOMMU
243 config TEGRA_IOMMU_GART
244 bool "Tegra GART IOMMU Support"
245 depends on ARCH_TEGRA_2x_SOC
248 Enables support for remapping discontiguous physical memory
249 shared with the operating system into contiguous I/O virtual
250 space through the GART (Graphics Address Relocation Table)
251 hardware included on Tegra SoCs.
253 config TEGRA_IOMMU_SMMU
254 bool "NVIDIA Tegra SMMU Support"
255 depends on ARCH_TEGRA
260 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
261 SoCs (Tegra30 up to Tegra210).
264 bool "Exynos IOMMU Support"
265 depends on ARCH_EXYNOS && MMU
267 select ARM_DMA_USE_IOMMU
269 Support for the IOMMU (System MMU) of Samsung Exynos application
270 processor family. This enables H/W multimedia accelerators to see
271 non-linear physical memory chunks as linear memory in their
274 If unsure, say N here.
276 config EXYNOS_IOMMU_DEBUG
277 bool "Debugging log for Exynos IOMMU"
278 depends on EXYNOS_IOMMU
280 Select this to see the detailed log message that shows what
281 happens in the IOMMU driver.
283 Say N unless you need kernel log message for IOMMU debugging.
286 bool "Renesas VMSA-compatible IPMMU"
288 depends on ARCH_RENESAS || COMPILE_TEST
290 select IOMMU_IO_PGTABLE_LPAE
291 select ARM_DMA_USE_IOMMU
293 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
294 R-Mobile APE6 and R-Car H2/M2 SoCs.
298 config SPAPR_TCE_IOMMU
299 bool "sPAPR TCE IOMMU Support"
300 depends on PPC_POWERNV || PPC_PSERIES
303 Enables bits of IOMMU API required by VFIO. The iommu_ops
304 is not implemented as it is not necessary for VFIO.
308 bool "ARM Ltd. System MMU (SMMU) Support"
309 depends on (ARM64 || ARM) && MMU
311 select IOMMU_IO_PGTABLE_LPAE
312 select ARM_DMA_USE_IOMMU if ARM
314 Support for implementations of the ARM System MMU architecture
317 Say Y here if your SoC includes an IOMMU device implementing
318 the ARM SMMU architecture.
321 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
322 depends on ARM64 && PCI
324 select IOMMU_IO_PGTABLE_LPAE
325 select GENERIC_MSI_IRQ_DOMAIN
327 Support for implementations of the ARM System MMU architecture
328 version 3 providing translation support to a PCIe root complex.
330 Say Y here if your system includes an IOMMU device implementing
331 the ARM SMMUv3 architecture.
334 def_bool y if S390 && PCI
335 depends on S390 && PCI
338 Support for the IOMMU API for s390 PCI devices.
341 bool "MTK IOMMU Support"
342 depends on ARM || ARM64
343 depends on ARCH_MEDIATEK || COMPILE_TEST
344 select ARM_DMA_USE_IOMMU
347 select IOMMU_IO_PGTABLE_ARMV7S
351 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
352 Memory Management Unit. This option enables remapping of DMA memory
353 accesses for the multimedia subsystem.
355 If unsure, say N here.
357 endif # IOMMU_SUPPORT