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.
49 depends on OF && IOMMU_API
52 bool "Freescale IOMMU support"
54 depends on PPC_E500MC || COMPILE_TEST
56 select GENERIC_ALLOCATOR
58 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
59 PAMU can authorize memory access, remap the memory address, and remap I/O
64 bool "MSM IOMMU Support"
66 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
70 Support for the IOMMUs found on certain Qualcomm SOCs.
71 These IOMMUs allow virtualization of the address space used by most
72 cores within the multimedia subsystem.
74 If unsure, say N here.
76 config IOMMU_PGTABLES_L2
78 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
82 bool "AMD IOMMU support"
89 depends on X86_64 && PCI && ACPI
91 With this option you can enable support for AMD IOMMU hardware in
92 your system. An IOMMU is a hardware component which provides
93 remapping of DMA memory accesses from devices. With an AMD IOMMU you
94 can isolate the DMA memory of different devices and protect the
95 system from misbehaving device drivers or hardware.
97 You can find out if your system has an AMD IOMMU if you look into
98 your BIOS for an option to enable it or if you have an IVRS ACPI
101 config AMD_IOMMU_STATS
102 bool "Export AMD IOMMU statistics to debugfs"
106 This option enables code in the AMD IOMMU driver to collect various
107 statistics about whats happening in the driver and exports that
108 information to userspace via debugfs.
112 tristate "AMD IOMMU Version 2 driver"
116 This option enables support for the AMD IOMMUv2 features of the IOMMU
117 hardware. Select this option if you want to use devices that support
118 the PCI PRI and PASID interface.
120 # Intel IOMMU support
125 bool "Support for Intel IOMMU using DMA Remapping Devices"
126 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
131 DMA remapping (DMAR) devices support enables independent address
132 translations for Direct Memory Access (DMA) from devices.
133 These DMA remapping devices are reported via ACPI tables
134 and include PCI device scope covered by these DMA
137 config INTEL_IOMMU_SVM
138 bool "Support for Shared Virtual Memory with Intel IOMMU"
139 depends on INTEL_IOMMU && X86
143 Shared Virtual Memory (SVM) provides a facility for devices
144 to access DMA resources through process address space by
145 means of a Process Address Space ID (PASID).
147 config INTEL_IOMMU_DEFAULT_ON
149 prompt "Enable Intel DMA Remapping Devices by default"
150 depends on INTEL_IOMMU
152 Selecting this option will enable a DMAR device at boot time if
153 one is found. If this option is not selected, DMAR support can
154 be enabled by passing intel_iommu=on to the kernel.
156 config INTEL_IOMMU_BROKEN_GFX_WA
157 bool "Workaround broken graphics drivers (going away soon)"
158 depends on INTEL_IOMMU && BROKEN && X86
160 Current Graphics drivers tend to use physical address
161 for DMA and avoid using DMA APIs. Setting this config
162 option permits the IOMMU driver to set a unity map for
163 all the OS-visible memory. Hence the driver can continue
164 to use physical addresses for DMA, at least until this
165 option is removed in the 2.6.32 kernel.
167 config INTEL_IOMMU_FLOPPY_WA
169 depends on INTEL_IOMMU && X86
171 Floppy disk drivers are known to bypass DMA API calls
172 thereby failing to work when IOMMU is enabled. This
173 workaround will setup a 1:1 mapping for the first
174 16MiB to make floppy (an ISA device) work.
177 bool "Support for Interrupt Remapping"
178 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
181 Supports Interrupt remapping for IO-APIC and MSI devices.
182 To use x2apic mode in the CPU's which support x2APIC enhancements or
183 to support platforms with CPU's having > 8 bit APIC ID, say Y.
187 bool "OMAP IOMMU Support"
188 depends on ARM && MMU
189 depends on ARCH_OMAP2PLUS || COMPILE_TEST
192 The OMAP3 media platform drivers depend on iommu support,
193 if you need them say Y here.
195 config OMAP_IOMMU_DEBUG
196 bool "Export OMAP IOMMU internals in DebugFS"
197 depends on OMAP_IOMMU && DEBUG_FS
199 Select this to see extensive information about
200 the internal state of OMAP IOMMU in debugfs.
202 Say N unless you know you need this.
204 config ROCKCHIP_IOMMU
205 bool "Rockchip IOMMU Support"
207 depends on ARCH_ROCKCHIP || COMPILE_TEST
209 select ARM_DMA_USE_IOMMU
211 Support for IOMMUs found on Rockchip rk32xx SOCs.
212 These IOMMUs allow virtualization of the address space used by most
213 cores within the multimedia subsystem.
214 Say Y here if you are using a Rockchip SoC that includes an IOMMU
217 config TEGRA_IOMMU_GART
218 bool "Tegra GART IOMMU Support"
219 depends on ARCH_TEGRA_2x_SOC
222 Enables support for remapping discontiguous physical memory
223 shared with the operating system into contiguous I/O virtual
224 space through the GART (Graphics Address Relocation Table)
225 hardware included on Tegra SoCs.
227 config TEGRA_IOMMU_SMMU
228 bool "NVIDIA Tegra SMMU Support"
229 depends on ARCH_TEGRA
234 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
235 SoCs (Tegra30 up to Tegra210).
238 bool "Exynos IOMMU Support"
239 depends on ARCH_EXYNOS && ARM && MMU
241 select ARM_DMA_USE_IOMMU
243 Support for the IOMMU (System MMU) of Samsung Exynos application
244 processor family. This enables H/W multimedia accelerators to see
245 non-linear physical memory chunks as linear memory in their
248 If unsure, say N here.
250 config EXYNOS_IOMMU_DEBUG
251 bool "Debugging log for Exynos IOMMU"
252 depends on EXYNOS_IOMMU
254 Select this to see the detailed log message that shows what
255 happens in the IOMMU driver.
257 Say N unless you need kernel log message for IOMMU debugging.
259 config SHMOBILE_IPMMU
262 config SHMOBILE_IPMMU_TLB
265 config SHMOBILE_IOMMU
266 bool "IOMMU for Renesas IPMMU/IPMMUI"
268 depends on ARM && MMU
269 depends on ARCH_SHMOBILE || COMPILE_TEST
271 select ARM_DMA_USE_IOMMU
272 select SHMOBILE_IPMMU
273 select SHMOBILE_IPMMU_TLB
275 Support for Renesas IPMMU/IPMMUI. This option enables
276 remapping of DMA memory accesses from all of the IP blocks
279 Warning: Drivers (including userspace drivers of UIO
280 devices) of the IP blocks on the ICB *must* use addresses
281 allocated from the IPMMU (iova) for DMA with this option
287 prompt "IPMMU/IPMMUI address space size"
288 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
289 depends on SHMOBILE_IOMMU
291 This option sets IPMMU/IPMMUI address space size by
292 adjusting the 1st level page table size. The page table size
293 is calculated as follows:
295 page table size = number of page table entries * 4 bytes
296 number of page table entries = address space size / 1 MiB
298 For example, when the address space size is 2048 MiB, the
299 1st level page table size is 8192 bytes.
301 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
304 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
307 config SHMOBILE_IOMMU_ADDRSIZE_512MB
310 config SHMOBILE_IOMMU_ADDRSIZE_256MB
313 config SHMOBILE_IOMMU_ADDRSIZE_128MB
316 config SHMOBILE_IOMMU_ADDRSIZE_64MB
319 config SHMOBILE_IOMMU_ADDRSIZE_32MB
324 config SHMOBILE_IOMMU_L1SIZE
326 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
327 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
328 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
329 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
330 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
331 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
332 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
335 bool "Renesas VMSA-compatible IPMMU"
337 depends on ARCH_SHMOBILE || COMPILE_TEST
339 select IOMMU_IO_PGTABLE_LPAE
340 select ARM_DMA_USE_IOMMU
342 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
343 R-Mobile APE6 and R-Car H2/M2 SoCs.
347 config SPAPR_TCE_IOMMU
348 bool "sPAPR TCE IOMMU Support"
349 depends on PPC_POWERNV || PPC_PSERIES
352 Enables bits of IOMMU API required by VFIO. The iommu_ops
353 is not implemented as it is not necessary for VFIO.
357 bool "ARM Ltd. System MMU (SMMU) Support"
358 depends on (ARM64 || ARM) && MMU
360 select IOMMU_IO_PGTABLE_LPAE
361 select ARM_DMA_USE_IOMMU if ARM
363 Support for implementations of the ARM System MMU architecture
366 Say Y here if your SoC includes an IOMMU device implementing
367 the ARM SMMU architecture.
370 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
371 depends on ARM64 && PCI
373 select IOMMU_IO_PGTABLE_LPAE
375 Support for implementations of the ARM System MMU architecture
376 version 3 providing translation support to a PCIe root complex.
378 Say Y here if your system includes an IOMMU device implementing
379 the ARM SMMUv3 architecture.
381 endif # IOMMU_SUPPORT