Loading...
1# SPDX-License-Identifier: GPL-2.0-only
2# The IOVA library may also be used by non-IOMMU_API users
3config IOMMU_IOVA
4 tristate
5
6# The IOASID library may also be used by non-IOMMU_API users
7config IOASID
8 tristate
9
10# IOMMU_API always gets selected by whoever wants it.
11config IOMMU_API
12 bool
13
14menuconfig IOMMU_SUPPORT
15 bool "IOMMU Hardware Support"
16 depends on MMU
17 default y
18 help
19 Say Y here if you want to compile device drivers for IO Memory
20 Management Units into the kernel. These devices usually allow to
21 remap DMA requests and/or remap interrupts from other devices on the
22 system.
23
24if IOMMU_SUPPORT
25
26menu "Generic IOMMU Pagetable Support"
27
28# Selected by the actual pagetable implementations
29config IOMMU_IO_PGTABLE
30 bool
31
32config IOMMU_IO_PGTABLE_LPAE
33 bool "ARMv7/v8 Long Descriptor Format"
34 select IOMMU_IO_PGTABLE
35 depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
36 help
37 Enable support for the ARM long descriptor pagetable format.
38 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
39 sizes at both stage-1 and stage-2, as well as address spaces
40 up to 48-bits in size.
41
42config IOMMU_IO_PGTABLE_LPAE_SELFTEST
43 bool "LPAE selftests"
44 depends on IOMMU_IO_PGTABLE_LPAE
45 help
46 Enable self-tests for LPAE page table allocator. This performs
47 a series of page-table consistency checks during boot.
48
49 If unsure, say N here.
50
51config IOMMU_IO_PGTABLE_ARMV7S
52 bool "ARMv7/v8 Short Descriptor Format"
53 select IOMMU_IO_PGTABLE
54 depends on ARM || ARM64 || COMPILE_TEST
55 help
56 Enable support for the ARM Short-descriptor pagetable format.
57 This supports 32-bit virtual and physical addresses mapped using
58 2-level tables with 4KB pages/1MB sections, and contiguous entries
59 for 64KB pages/16MB supersections if indicated by the IOMMU driver.
60
61config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
62 bool "ARMv7s selftests"
63 depends on IOMMU_IO_PGTABLE_ARMV7S
64 help
65 Enable self-tests for ARMv7s page table allocator. This performs
66 a series of page-table consistency checks during boot.
67
68 If unsure, say N here.
69
70endmenu
71
72config IOMMU_DEBUGFS
73 bool "Export IOMMU internals in DebugFS"
74 depends on DEBUG_FS
75 help
76 Allows exposure of IOMMU device internals. This option enables
77 the use of debugfs by IOMMU drivers as required. Devices can,
78 at initialization time, cause the IOMMU code to create a top-level
79 debug/iommu directory, and then populate a subdirectory with
80 entries as required.
81
82config IOMMU_DEFAULT_PASSTHROUGH
83 bool "IOMMU passthrough by default"
84 depends on IOMMU_API
85 help
86 Enable passthrough by default, removing the need to pass in
87 iommu.passthrough=on or iommu=pt through command line. If this
88 is enabled, you can still disable with iommu.passthrough=off
89 or iommu=nopt depending on the architecture.
90
91 If unsure, say N here.
92
93config OF_IOMMU
94 def_bool y
95 depends on OF && IOMMU_API
96
97# IOMMU-agnostic DMA-mapping layer
98config IOMMU_DMA
99 bool
100 select DMA_OPS
101 select IOMMU_API
102 select IOMMU_IOVA
103 select IRQ_MSI_IOMMU
104 select NEED_SG_DMA_LENGTH
105
106config FSL_PAMU
107 bool "Freescale IOMMU support"
108 depends on PCI
109 depends on PHYS_64BIT
110 depends on PPC_E500MC || (COMPILE_TEST && PPC)
111 select IOMMU_API
112 select GENERIC_ALLOCATOR
113 help
114 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
115 PAMU can authorize memory access, remap the memory address, and remap I/O
116 transaction types.
117
118# MSM IOMMU support
119config MSM_IOMMU
120 bool "MSM IOMMU Support"
121 depends on ARM
122 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
123 select IOMMU_API
124 select IOMMU_IO_PGTABLE_ARMV7S
125 help
126 Support for the IOMMUs found on certain Qualcomm SOCs.
127 These IOMMUs allow virtualization of the address space used by most
128 cores within the multimedia subsystem.
129
130 If unsure, say N here.
131
132source "drivers/iommu/amd/Kconfig"
133source "drivers/iommu/intel/Kconfig"
134
135config IRQ_REMAP
136 bool "Support for Interrupt Remapping"
137 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
138 select DMAR_TABLE
139 help
140 Supports Interrupt remapping for IO-APIC and MSI devices.
141 To use x2apic mode in the CPU's which support x2APIC enhancements or
142 to support platforms with CPU's having > 8 bit APIC ID, say Y.
143
144# OMAP IOMMU support
145config OMAP_IOMMU
146 bool "OMAP IOMMU Support"
147 depends on ARCH_OMAP2PLUS || COMPILE_TEST
148 select IOMMU_API
149 help
150 The OMAP3 media platform drivers depend on iommu support,
151 if you need them say Y here.
152
153config OMAP_IOMMU_DEBUG
154 bool "Export OMAP IOMMU internals in DebugFS"
155 depends on OMAP_IOMMU && DEBUG_FS
156 help
157 Select this to see extensive information about
158 the internal state of OMAP IOMMU in debugfs.
159
160 Say N unless you know you need this.
161
162config ROCKCHIP_IOMMU
163 bool "Rockchip IOMMU Support"
164 depends on ARCH_ROCKCHIP || COMPILE_TEST
165 select IOMMU_API
166 select ARM_DMA_USE_IOMMU
167 help
168 Support for IOMMUs found on Rockchip rk32xx SOCs.
169 These IOMMUs allow virtualization of the address space used by most
170 cores within the multimedia subsystem.
171 Say Y here if you are using a Rockchip SoC that includes an IOMMU
172 device.
173
174config SUN50I_IOMMU
175 bool "Allwinner H6 IOMMU Support"
176 depends on HAS_DMA
177 depends on ARCH_SUNXI || COMPILE_TEST
178 select ARM_DMA_USE_IOMMU
179 select IOMMU_API
180 help
181 Support for the IOMMU introduced in the Allwinner H6 SoCs.
182
183config TEGRA_IOMMU_GART
184 bool "Tegra GART IOMMU Support"
185 depends on ARCH_TEGRA_2x_SOC
186 depends on TEGRA_MC
187 select IOMMU_API
188 help
189 Enables support for remapping discontiguous physical memory
190 shared with the operating system into contiguous I/O virtual
191 space through the GART (Graphics Address Relocation Table)
192 hardware included on Tegra SoCs.
193
194config TEGRA_IOMMU_SMMU
195 bool "NVIDIA Tegra SMMU Support"
196 depends on ARCH_TEGRA
197 depends on TEGRA_AHB
198 depends on TEGRA_MC
199 select IOMMU_API
200 help
201 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
202 SoCs (Tegra30 up to Tegra210).
203
204config EXYNOS_IOMMU
205 bool "Exynos IOMMU Support"
206 depends on ARCH_EXYNOS || COMPILE_TEST
207 depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
208 select IOMMU_API
209 select ARM_DMA_USE_IOMMU
210 help
211 Support for the IOMMU (System MMU) of Samsung Exynos application
212 processor family. This enables H/W multimedia accelerators to see
213 non-linear physical memory chunks as linear memory in their
214 address space.
215
216 If unsure, say N here.
217
218config EXYNOS_IOMMU_DEBUG
219 bool "Debugging log for Exynos IOMMU"
220 depends on EXYNOS_IOMMU
221 help
222 Select this to see the detailed log message that shows what
223 happens in the IOMMU driver.
224
225 Say N unless you need kernel log message for IOMMU debugging.
226
227config IPMMU_VMSA
228 bool "Renesas VMSA-compatible IPMMU"
229 depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64)
230 select IOMMU_API
231 select IOMMU_IO_PGTABLE_LPAE
232 select ARM_DMA_USE_IOMMU
233 help
234 Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
235 APE6, R-Car Gen2, and R-Car Gen3 SoCs.
236
237 If unsure, say N.
238
239config SPAPR_TCE_IOMMU
240 bool "sPAPR TCE IOMMU Support"
241 depends on PPC_POWERNV || PPC_PSERIES
242 select IOMMU_API
243 help
244 Enables bits of IOMMU API required by VFIO. The iommu_ops
245 is not implemented as it is not necessary for VFIO.
246
247# ARM IOMMU support
248config ARM_SMMU
249 tristate "ARM Ltd. System MMU (SMMU) Support"
250 depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64)
251 select IOMMU_API
252 select IOMMU_IO_PGTABLE_LPAE
253 select ARM_DMA_USE_IOMMU if ARM
254 help
255 Support for implementations of the ARM System MMU architecture
256 versions 1 and 2.
257
258 Say Y here if your SoC includes an IOMMU device implementing
259 the ARM SMMU architecture.
260
261config ARM_SMMU_LEGACY_DT_BINDINGS
262 bool "Support the legacy \"mmu-masters\" devicetree bindings"
263 depends on ARM_SMMU=y && OF
264 help
265 Support for the badly designed and deprecated "mmu-masters"
266 devicetree bindings. This allows some DMA masters to attach
267 to the SMMU but does not provide any support via the DMA API.
268 If you're lucky, you might be able to get VFIO up and running.
269
270 If you say Y here then you'll make me very sad. Instead, say N
271 and move your firmware to the utopian future that was 2016.
272
273config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
274 bool "Default to disabling bypass on ARM SMMU v1 and v2"
275 depends on ARM_SMMU
276 default y
277 help
278 Say Y here to (by default) disable bypass streams such that
279 incoming transactions from devices that are not attached to
280 an iommu domain will report an abort back to the device and
281 will not be allowed to pass through the SMMU.
282
283 Any old kernels that existed before this KConfig was
284 introduced would default to _allowing_ bypass (AKA the
285 equivalent of NO for this config). However the default for
286 this option is YES because the old behavior is insecure.
287
288 There are few reasons to allow unmatched stream bypass, and
289 even fewer good ones. If saying YES here breaks your board
290 you should work on fixing your board. This KConfig option
291 is expected to be removed in the future and we'll simply
292 hardcode the bypass disable in the code.
293
294 NOTE: the kernel command line parameter
295 'arm-smmu.disable_bypass' will continue to override this
296 config.
297
298config ARM_SMMU_V3
299 tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
300 depends on ARM64
301 select IOMMU_API
302 select IOMMU_IO_PGTABLE_LPAE
303 select GENERIC_MSI_IRQ_DOMAIN
304 help
305 Support for implementations of the ARM System MMU architecture
306 version 3 providing translation support to a PCIe root complex.
307
308 Say Y here if your system includes an IOMMU device implementing
309 the ARM SMMUv3 architecture.
310
311config S390_IOMMU
312 def_bool y if S390 && PCI
313 depends on S390 && PCI
314 select IOMMU_API
315 help
316 Support for the IOMMU API for s390 PCI devices.
317
318config S390_CCW_IOMMU
319 bool "S390 CCW IOMMU Support"
320 depends on S390 && CCW || COMPILE_TEST
321 select IOMMU_API
322 help
323 Enables bits of IOMMU API required by VFIO. The iommu_ops
324 is not implemented as it is not necessary for VFIO.
325
326config S390_AP_IOMMU
327 bool "S390 AP IOMMU Support"
328 depends on S390 && ZCRYPT || COMPILE_TEST
329 select IOMMU_API
330 help
331 Enables bits of IOMMU API required by VFIO. The iommu_ops
332 is not implemented as it is not necessary for VFIO.
333
334config MTK_IOMMU
335 bool "MTK IOMMU Support"
336 depends on ARCH_MEDIATEK || COMPILE_TEST
337 select ARM_DMA_USE_IOMMU
338 select IOMMU_API
339 select IOMMU_IO_PGTABLE_ARMV7S
340 select MEMORY
341 select MTK_SMI
342 help
343 Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
344 Memory Management Unit. This option enables remapping of DMA memory
345 accesses for the multimedia subsystem.
346
347 If unsure, say N here.
348
349config MTK_IOMMU_V1
350 bool "MTK IOMMU Version 1 (M4U gen1) Support"
351 depends on ARM
352 depends on ARCH_MEDIATEK || COMPILE_TEST
353 select ARM_DMA_USE_IOMMU
354 select IOMMU_API
355 select MEMORY
356 select MTK_SMI
357 help
358 Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
359 Multimedia Memory Managememt Unit. This option enables remapping of
360 DMA memory accesses for the multimedia subsystem.
361
362 if unsure, say N here.
363
364config QCOM_IOMMU
365 # Note: iommu drivers cannot (yet?) be built as modules
366 bool "Qualcomm IOMMU Support"
367 depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
368 select IOMMU_API
369 select IOMMU_IO_PGTABLE_LPAE
370 select ARM_DMA_USE_IOMMU
371 help
372 Support for IOMMU on certain Qualcomm SoCs.
373
374config HYPERV_IOMMU
375 bool "Hyper-V x2APIC IRQ Handling"
376 depends on HYPERV && X86
377 select IOMMU_API
378 default HYPERV
379 help
380 Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
381 guests to run with x2APIC mode enabled.
382
383config VIRTIO_IOMMU
384 tristate "Virtio IOMMU driver"
385 depends on VIRTIO
386 depends on ARM64
387 select IOMMU_API
388 select INTERVAL_TREE
389 help
390 Para-virtualised IOMMU driver with virtio.
391
392 Say Y here if you intend to run this kernel as a guest.
393
394endif # IOMMU_SUPPORT
1# IOMMU_API always gets selected by whoever wants it.
2config IOMMU_API
3 bool
4
5menuconfig IOMMU_SUPPORT
6 bool "IOMMU Hardware Support"
7 depends on MMU
8 default y
9 ---help---
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
13 system.
14
15if IOMMU_SUPPORT
16
17menu "Generic IOMMU Pagetable Support"
18
19# Selected by the actual pagetable implementations
20config IOMMU_IO_PGTABLE
21 bool
22
23config 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)
27 help
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.
32
33config IOMMU_IO_PGTABLE_LPAE_SELFTEST
34 bool "LPAE selftests"
35 depends on IOMMU_IO_PGTABLE_LPAE
36 help
37 Enable self-tests for LPAE page table allocator. This performs
38 a series of page-table consistency checks during boot.
39
40 If unsure, say N here.
41
42config 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)
46 help
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.
51
52config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
53 bool "ARMv7s selftests"
54 depends on IOMMU_IO_PGTABLE_ARMV7S
55 help
56 Enable self-tests for ARMv7s page table allocator. This performs
57 a series of page-table consistency checks during boot.
58
59 If unsure, say N here.
60
61endmenu
62
63config IOMMU_IOVA
64 tristate
65
66config OF_IOMMU
67 def_bool y
68 depends on OF && IOMMU_API
69
70# IOMMU-agnostic DMA-mapping layer
71config IOMMU_DMA
72 bool
73 select IOMMU_API
74 select IOMMU_IOVA
75 select NEED_SG_DMA_LENGTH
76
77config FSL_PAMU
78 bool "Freescale IOMMU support"
79 depends on PPC32
80 depends on PPC_E500MC || COMPILE_TEST
81 select IOMMU_API
82 select GENERIC_ALLOCATOR
83 help
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
86 transaction types.
87
88# MSM IOMMU support
89config MSM_IOMMU
90 bool "MSM IOMMU Support"
91 depends on ARM
92 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
93 depends on BROKEN
94 select IOMMU_API
95 help
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.
99
100 If unsure, say N here.
101
102config IOMMU_PGTABLES_L2
103 def_bool y
104 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
105
106# AMD IOMMU support
107config AMD_IOMMU
108 bool "AMD IOMMU support"
109 select SWIOTLB
110 select PCI_MSI
111 select PCI_ATS
112 select PCI_PRI
113 select PCI_PASID
114 select IOMMU_API
115 depends on X86_64 && PCI && ACPI
116 ---help---
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.
122
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
125 table.
126
127config AMD_IOMMU_STATS
128 bool "Export AMD IOMMU statistics to debugfs"
129 depends on AMD_IOMMU
130 select DEBUG_FS
131 ---help---
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.
135 If unsure, say N.
136
137config AMD_IOMMU_V2
138 tristate "AMD IOMMU Version 2 driver"
139 depends on AMD_IOMMU
140 select MMU_NOTIFIER
141 ---help---
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.
145
146# Intel IOMMU support
147config DMAR_TABLE
148 bool
149
150config INTEL_IOMMU
151 bool "Support for Intel IOMMU using DMA Remapping Devices"
152 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
153 select IOMMU_API
154 select IOMMU_IOVA
155 select DMAR_TABLE
156 help
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
161 remapping devices.
162
163config INTEL_IOMMU_SVM
164 bool "Support for Shared Virtual Memory with Intel IOMMU"
165 depends on INTEL_IOMMU && X86
166 select PCI_PASID
167 select MMU_NOTIFIER
168 help
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).
172
173config INTEL_IOMMU_DEFAULT_ON
174 def_bool y
175 prompt "Enable Intel DMA Remapping Devices by default"
176 depends on INTEL_IOMMU
177 help
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.
181
182config INTEL_IOMMU_BROKEN_GFX_WA
183 bool "Workaround broken graphics drivers (going away soon)"
184 depends on INTEL_IOMMU && BROKEN && X86
185 ---help---
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.
192
193config INTEL_IOMMU_FLOPPY_WA
194 def_bool y
195 depends on INTEL_IOMMU && X86
196 ---help---
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.
201
202config IRQ_REMAP
203 bool "Support for Interrupt Remapping"
204 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
205 select DMAR_TABLE
206 ---help---
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.
210
211# OMAP IOMMU support
212config OMAP_IOMMU
213 bool "OMAP IOMMU Support"
214 depends on ARM && MMU
215 depends on ARCH_OMAP2PLUS || COMPILE_TEST
216 select IOMMU_API
217 ---help---
218 The OMAP3 media platform drivers depend on iommu support,
219 if you need them say Y here.
220
221config OMAP_IOMMU_DEBUG
222 bool "Export OMAP IOMMU internals in DebugFS"
223 depends on OMAP_IOMMU && DEBUG_FS
224 ---help---
225 Select this to see extensive information about
226 the internal state of OMAP IOMMU in debugfs.
227
228 Say N unless you know you need this.
229
230config ROCKCHIP_IOMMU
231 bool "Rockchip IOMMU Support"
232 depends on ARM
233 depends on ARCH_ROCKCHIP || COMPILE_TEST
234 select IOMMU_API
235 select ARM_DMA_USE_IOMMU
236 help
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
241 device.
242
243config TEGRA_IOMMU_GART
244 bool "Tegra GART IOMMU Support"
245 depends on ARCH_TEGRA_2x_SOC
246 select IOMMU_API
247 help
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.
252
253config TEGRA_IOMMU_SMMU
254 bool "NVIDIA Tegra SMMU Support"
255 depends on ARCH_TEGRA
256 depends on TEGRA_AHB
257 depends on TEGRA_MC
258 select IOMMU_API
259 help
260 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
261 SoCs (Tegra30 up to Tegra210).
262
263config EXYNOS_IOMMU
264 bool "Exynos IOMMU Support"
265 depends on ARCH_EXYNOS && MMU
266 select IOMMU_API
267 select ARM_DMA_USE_IOMMU
268 help
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
272 address space.
273
274 If unsure, say N here.
275
276config EXYNOS_IOMMU_DEBUG
277 bool "Debugging log for Exynos IOMMU"
278 depends on EXYNOS_IOMMU
279 help
280 Select this to see the detailed log message that shows what
281 happens in the IOMMU driver.
282
283 Say N unless you need kernel log message for IOMMU debugging.
284
285config IPMMU_VMSA
286 bool "Renesas VMSA-compatible IPMMU"
287 depends on ARM_LPAE
288 depends on ARCH_RENESAS || COMPILE_TEST
289 select IOMMU_API
290 select IOMMU_IO_PGTABLE_LPAE
291 select ARM_DMA_USE_IOMMU
292 help
293 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
294 R-Mobile APE6 and R-Car H2/M2 SoCs.
295
296 If unsure, say N.
297
298config SPAPR_TCE_IOMMU
299 bool "sPAPR TCE IOMMU Support"
300 depends on PPC_POWERNV || PPC_PSERIES
301 select IOMMU_API
302 help
303 Enables bits of IOMMU API required by VFIO. The iommu_ops
304 is not implemented as it is not necessary for VFIO.
305
306# ARM IOMMU support
307config ARM_SMMU
308 bool "ARM Ltd. System MMU (SMMU) Support"
309 depends on (ARM64 || ARM) && MMU
310 select IOMMU_API
311 select IOMMU_IO_PGTABLE_LPAE
312 select ARM_DMA_USE_IOMMU if ARM
313 help
314 Support for implementations of the ARM System MMU architecture
315 versions 1 and 2.
316
317 Say Y here if your SoC includes an IOMMU device implementing
318 the ARM SMMU architecture.
319
320config ARM_SMMU_V3
321 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
322 depends on ARM64 && PCI
323 select IOMMU_API
324 select IOMMU_IO_PGTABLE_LPAE
325 select GENERIC_MSI_IRQ_DOMAIN
326 help
327 Support for implementations of the ARM System MMU architecture
328 version 3 providing translation support to a PCIe root complex.
329
330 Say Y here if your system includes an IOMMU device implementing
331 the ARM SMMUv3 architecture.
332
333config S390_IOMMU
334 def_bool y if S390 && PCI
335 depends on S390 && PCI
336 select IOMMU_API
337 help
338 Support for the IOMMU API for s390 PCI devices.
339
340config MTK_IOMMU
341 bool "MTK IOMMU Support"
342 depends on ARM || ARM64
343 depends on ARCH_MEDIATEK || COMPILE_TEST
344 select ARM_DMA_USE_IOMMU
345 select IOMMU_API
346 select IOMMU_DMA
347 select IOMMU_IO_PGTABLE_ARMV7S
348 select MEMORY
349 select MTK_SMI
350 help
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.
354
355 If unsure, say N here.
356
357endif # IOMMU_SUPPORT