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Commit | Line | Data |
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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
bd3c2e66 SA |
2 | # The IOVA library may also be used by non-IOMMU_API users |
3 | config IOMMU_IOVA | |
4 | tristate | |
5 | ||
ab493a0f OBC |
6 | # IOMMU_API always gets selected by whoever wants it. |
7 | config IOMMU_API | |
8 | bool | |
b10f127e | 9 | |
68255b62 JR |
10 | menuconfig IOMMU_SUPPORT |
11 | bool "IOMMU Hardware Support" | |
e5144c93 | 12 | depends on MMU |
68255b62 JR |
13 | default y |
14 | ---help--- | |
15 | Say Y here if you want to compile device drivers for IO Memory | |
16 | Management Units into the kernel. These devices usually allow to | |
17 | remap DMA requests and/or remap interrupts from other devices on the | |
18 | system. | |
19 | ||
20 | if IOMMU_SUPPORT | |
21 | ||
fdb1d7be WD |
22 | menu "Generic IOMMU Pagetable Support" |
23 | ||
24 | # Selected by the actual pagetable implementations | |
25 | config IOMMU_IO_PGTABLE | |
26 | bool | |
27 | ||
e1d3c0fd WD |
28 | config IOMMU_IO_PGTABLE_LPAE |
29 | bool "ARMv7/v8 Long Descriptor Format" | |
30 | select IOMMU_IO_PGTABLE | |
48e6f765 | 31 | depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64) |
e1d3c0fd WD |
32 | help |
33 | Enable support for the ARM long descriptor pagetable format. | |
34 | This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page | |
35 | sizes at both stage-1 and stage-2, as well as address spaces | |
36 | up to 48-bits in size. | |
37 | ||
fe4b991d WD |
38 | config IOMMU_IO_PGTABLE_LPAE_SELFTEST |
39 | bool "LPAE selftests" | |
40 | depends on IOMMU_IO_PGTABLE_LPAE | |
41 | help | |
42 | Enable self-tests for LPAE page table allocator. This performs | |
43 | a series of page-table consistency checks during boot. | |
44 | ||
45 | If unsure, say N here. | |
46 | ||
e5fc9753 RM |
47 | config IOMMU_IO_PGTABLE_ARMV7S |
48 | bool "ARMv7/v8 Short Descriptor Format" | |
49 | select IOMMU_IO_PGTABLE | |
48e6f765 | 50 | depends on ARM || ARM64 || COMPILE_TEST |
e5fc9753 RM |
51 | help |
52 | Enable support for the ARM Short-descriptor pagetable format. | |
53 | This supports 32-bit virtual and physical addresses mapped using | |
54 | 2-level tables with 4KB pages/1MB sections, and contiguous entries | |
55 | for 64KB pages/16MB supersections if indicated by the IOMMU driver. | |
56 | ||
57 | config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST | |
58 | bool "ARMv7s selftests" | |
59 | depends on IOMMU_IO_PGTABLE_ARMV7S | |
60 | help | |
61 | Enable self-tests for ARMv7s page table allocator. This performs | |
62 | a series of page-table consistency checks during boot. | |
63 | ||
64 | If unsure, say N here. | |
65 | ||
fdb1d7be WD |
66 | endmenu |
67 | ||
bad614b2 GH |
68 | config IOMMU_DEBUGFS |
69 | bool "Export IOMMU internals in DebugFS" | |
70 | depends on DEBUG_FS | |
71 | help | |
72 | Allows exposure of IOMMU device internals. This option enables | |
73 | the use of debugfs by IOMMU drivers as required. Devices can, | |
74 | at initialization time, cause the IOMMU code to create a top-level | |
75 | debug/iommu directory, and then populate a subdirectory with | |
76 | entries as required. | |
77 | ||
58d11317 OJ |
78 | config IOMMU_DEFAULT_PASSTHROUGH |
79 | bool "IOMMU passthrough by default" | |
80 | depends on IOMMU_API | |
81 | help | |
82 | Enable passthrough by default, removing the need to pass in | |
83 | iommu.passthrough=on or iommu=pt through command line. If this | |
84 | is enabled, you can still disable with iommu.passthrough=off | |
85 | or iommu=nopt depending on the architecture. | |
86 | ||
87 | If unsure, say N here. | |
88 | ||
4e0ee78f HD |
89 | config OF_IOMMU |
90 | def_bool y | |
7eba1d51 | 91 | depends on OF && IOMMU_API |
4e0ee78f | 92 | |
0db2e5d1 RM |
93 | # IOMMU-agnostic DMA-mapping layer |
94 | config IOMMU_DMA | |
95 | bool | |
0db2e5d1 RM |
96 | select IOMMU_API |
97 | select IOMMU_IOVA | |
ece6e6f0 | 98 | select IRQ_MSI_IOMMU |
59a68eb8 | 99 | select NEED_SG_DMA_LENGTH |
0db2e5d1 | 100 | |
695093e3 VS |
101 | config FSL_PAMU |
102 | bool "Freescale IOMMU support" | |
a4d98fb3 | 103 | depends on PCI |
af29d9fa | 104 | depends on PHYS_64BIT |
a0d284d2 | 105 | depends on PPC_E500MC || (COMPILE_TEST && PPC) |
695093e3 VS |
106 | select IOMMU_API |
107 | select GENERIC_ALLOCATOR | |
108 | help | |
109 | Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. | |
110 | PAMU can authorize memory access, remap the memory address, and remap I/O | |
111 | transaction types. | |
112 | ||
b10f127e OBC |
113 | # MSM IOMMU support |
114 | config MSM_IOMMU | |
115 | bool "MSM IOMMU Support" | |
477ab7a1 JR |
116 | depends on ARM |
117 | depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST | |
b10f127e | 118 | select IOMMU_API |
c9220fbd | 119 | select IOMMU_IO_PGTABLE_ARMV7S |
b10f127e OBC |
120 | help |
121 | Support for the IOMMUs found on certain Qualcomm SOCs. | |
122 | These IOMMUs allow virtualization of the address space used by most | |
123 | cores within the multimedia subsystem. | |
124 | ||
125 | If unsure, say N here. | |
126 | ||
127 | config IOMMU_PGTABLES_L2 | |
128 | def_bool y | |
129 | depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n | |
29b68415 OBC |
130 | |
131 | # AMD IOMMU support | |
132 | config AMD_IOMMU | |
133 | bool "AMD IOMMU support" | |
134 | select SWIOTLB | |
135 | select PCI_MSI | |
52815b75 JR |
136 | select PCI_ATS |
137 | select PCI_PRI | |
138 | select PCI_PASID | |
29b68415 | 139 | select IOMMU_API |
a72c4225 | 140 | select IOMMU_IOVA |
0dbc6078 | 141 | depends on X86_64 && PCI && ACPI |
29b68415 OBC |
142 | ---help--- |
143 | With this option you can enable support for AMD IOMMU hardware in | |
144 | your system. An IOMMU is a hardware component which provides | |
145 | remapping of DMA memory accesses from devices. With an AMD IOMMU you | |
59bf8964 | 146 | can isolate the DMA memory of different devices and protect the |
29b68415 OBC |
147 | system from misbehaving device drivers or hardware. |
148 | ||
149 | You can find out if your system has an AMD IOMMU if you look into | |
150 | your BIOS for an option to enable it or if you have an IVRS ACPI | |
151 | table. | |
152 | ||
e3c495c7 | 153 | config AMD_IOMMU_V2 |
a446e219 | 154 | tristate "AMD IOMMU Version 2 driver" |
e5cac32c | 155 | depends on AMD_IOMMU |
8736b2c3 | 156 | select MMU_NOTIFIER |
e3c495c7 JR |
157 | ---help--- |
158 | This option enables support for the AMD IOMMUv2 features of the IOMMU | |
159 | hardware. Select this option if you want to use devices that support | |
59bf8964 | 160 | the PCI PRI and PASID interface. |
e3c495c7 | 161 | |
7d0f5fd3 GH |
162 | config AMD_IOMMU_DEBUGFS |
163 | bool "Enable AMD IOMMU internals in DebugFS" | |
164 | depends on AMD_IOMMU && IOMMU_DEBUGFS | |
165 | ---help--- | |
166 | !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! | |
167 | ||
168 | DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!! | |
169 | Exposes AMD IOMMU device internals in DebugFS. | |
170 | ||
171 | This option is -NOT- intended for production environments, and should | |
172 | not generally be enabled. | |
173 | ||
166e9278 | 174 | # Intel IOMMU support |
d3f13810 SS |
175 | config DMAR_TABLE |
176 | bool | |
177 | ||
178 | config INTEL_IOMMU | |
179 | bool "Support for Intel IOMMU using DMA Remapping Devices" | |
166e9278 OBC |
180 | depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) |
181 | select IOMMU_API | |
114150d8 | 182 | select IOMMU_IOVA |
f616ab59 | 183 | select NEED_DMA_MAP_STATE |
d3f13810 | 184 | select DMAR_TABLE |
166e9278 OBC |
185 | help |
186 | DMA remapping (DMAR) devices support enables independent address | |
187 | translations for Direct Memory Access (DMA) from devices. | |
188 | These DMA remapping devices are reported via ACPI tables | |
189 | and include PCI device scope covered by these DMA | |
190 | remapping devices. | |
191 | ||
ee2636b8 SM |
192 | config INTEL_IOMMU_DEBUGFS |
193 | bool "Export Intel IOMMU internals in Debugfs" | |
194 | depends on INTEL_IOMMU && IOMMU_DEBUGFS | |
195 | help | |
196 | !!!WARNING!!! | |
197 | ||
198 | DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!! | |
199 | ||
200 | Expose Intel IOMMU internals in Debugfs. | |
201 | ||
202 | This option is -NOT- intended for production environments, and should | |
203 | only be enabled for debugging Intel IOMMU. | |
204 | ||
8a94ade4 DW |
205 | config INTEL_IOMMU_SVM |
206 | bool "Support for Shared Virtual Memory with Intel IOMMU" | |
207 | depends on INTEL_IOMMU && X86 | |
b16d0cb9 | 208 | select PCI_PASID |
2f26e0a9 | 209 | select MMU_NOTIFIER |
8a94ade4 DW |
210 | help |
211 | Shared Virtual Memory (SVM) provides a facility for devices | |
212 | to access DMA resources through process address space by | |
213 | means of a Process Address Space ID (PASID). | |
214 | ||
d3f13810 | 215 | config INTEL_IOMMU_DEFAULT_ON |
166e9278 | 216 | def_bool y |
d3f13810 SS |
217 | prompt "Enable Intel DMA Remapping Devices by default" |
218 | depends on INTEL_IOMMU | |
166e9278 OBC |
219 | help |
220 | Selecting this option will enable a DMAR device at boot time if | |
221 | one is found. If this option is not selected, DMAR support can | |
222 | be enabled by passing intel_iommu=on to the kernel. | |
223 | ||
d3f13810 | 224 | config INTEL_IOMMU_BROKEN_GFX_WA |
166e9278 | 225 | bool "Workaround broken graphics drivers (going away soon)" |
d3f13810 | 226 | depends on INTEL_IOMMU && BROKEN && X86 |
166e9278 OBC |
227 | ---help--- |
228 | Current Graphics drivers tend to use physical address | |
229 | for DMA and avoid using DMA APIs. Setting this config | |
230 | option permits the IOMMU driver to set a unity map for | |
231 | all the OS-visible memory. Hence the driver can continue | |
232 | to use physical addresses for DMA, at least until this | |
233 | option is removed in the 2.6.32 kernel. | |
234 | ||
d3f13810 | 235 | config INTEL_IOMMU_FLOPPY_WA |
166e9278 | 236 | def_bool y |
d3f13810 | 237 | depends on INTEL_IOMMU && X86 |
166e9278 OBC |
238 | ---help--- |
239 | Floppy disk drivers are known to bypass DMA API calls | |
240 | thereby failing to work when IOMMU is enabled. This | |
241 | workaround will setup a 1:1 mapping for the first | |
242 | 16MiB to make floppy (an ISA device) work. | |
243 | ||
d3f13810 | 244 | config IRQ_REMAP |
a446e219 KC |
245 | bool "Support for Interrupt Remapping" |
246 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI | |
d3f13810 | 247 | select DMAR_TABLE |
166e9278 OBC |
248 | ---help--- |
249 | Supports Interrupt remapping for IO-APIC and MSI devices. | |
250 | To use x2apic mode in the CPU's which support x2APIC enhancements or | |
251 | to support platforms with CPU's having > 8 bit APIC ID, say Y. | |
68255b62 | 252 | |
fcf3a6ef OBC |
253 | # OMAP IOMMU support |
254 | config OMAP_IOMMU | |
255 | bool "OMAP IOMMU Support" | |
477ab7a1 JR |
256 | depends on ARM && MMU |
257 | depends on ARCH_OMAP2PLUS || COMPILE_TEST | |
fcf3a6ef | 258 | select IOMMU_API |
06b718c0 GH |
259 | ---help--- |
260 | The OMAP3 media platform drivers depend on iommu support, | |
261 | if you need them say Y here. | |
fcf3a6ef | 262 | |
fcf3a6ef | 263 | config OMAP_IOMMU_DEBUG |
61c75352 SA |
264 | bool "Export OMAP IOMMU internals in DebugFS" |
265 | depends on OMAP_IOMMU && DEBUG_FS | |
266 | ---help--- | |
267 | Select this to see extensive information about | |
268 | the internal state of OMAP IOMMU in debugfs. | |
fcf3a6ef | 269 | |
61c75352 | 270 | Say N unless you know you need this. |
fcf3a6ef | 271 | |
c68a2921 DK |
272 | config ROCKCHIP_IOMMU |
273 | bool "Rockchip IOMMU Support" | |
4f1fcfe9 | 274 | depends on ARM || ARM64 |
11175886 | 275 | depends on ARCH_ROCKCHIP || COMPILE_TEST |
c68a2921 DK |
276 | select IOMMU_API |
277 | select ARM_DMA_USE_IOMMU | |
278 | help | |
279 | Support for IOMMUs found on Rockchip rk32xx SOCs. | |
280 | These IOMMUs allow virtualization of the address space used by most | |
281 | cores within the multimedia subsystem. | |
282 | Say Y here if you are using a Rockchip SoC that includes an IOMMU | |
283 | device. | |
fcf3a6ef | 284 | |
d53e54b4 HD |
285 | config TEGRA_IOMMU_GART |
286 | bool "Tegra GART IOMMU Support" | |
287 | depends on ARCH_TEGRA_2x_SOC | |
ce2785a7 | 288 | depends on TEGRA_MC |
d53e54b4 HD |
289 | select IOMMU_API |
290 | help | |
291 | Enables support for remapping discontiguous physical memory | |
292 | shared with the operating system into contiguous I/O virtual | |
293 | space through the GART (Graphics Address Relocation Table) | |
294 | hardware included on Tegra SoCs. | |
295 | ||
7a31f6f4 | 296 | config TEGRA_IOMMU_SMMU |
89184651 TR |
297 | bool "NVIDIA Tegra SMMU Support" |
298 | depends on ARCH_TEGRA | |
299 | depends on TEGRA_AHB | |
300 | depends on TEGRA_MC | |
7a31f6f4 HD |
301 | select IOMMU_API |
302 | help | |
89184651 | 303 | This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra |
588c43a7 | 304 | SoCs (Tegra30 up to Tegra210). |
7a31f6f4 | 305 | |
2a96536e KC |
306 | config EXYNOS_IOMMU |
307 | bool "Exynos IOMMU Support" | |
740a01ee | 308 | depends on ARCH_EXYNOS && MMU |
db3a7fd7 | 309 | depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes |
2a96536e | 310 | select IOMMU_API |
4802c1d0 | 311 | select ARM_DMA_USE_IOMMU |
2a96536e | 312 | help |
5455d700 SK |
313 | Support for the IOMMU (System MMU) of Samsung Exynos application |
314 | processor family. This enables H/W multimedia accelerators to see | |
315 | non-linear physical memory chunks as linear memory in their | |
316 | address space. | |
2a96536e KC |
317 | |
318 | If unsure, say N here. | |
319 | ||
320 | config EXYNOS_IOMMU_DEBUG | |
321 | bool "Debugging log for Exynos IOMMU" | |
322 | depends on EXYNOS_IOMMU | |
323 | help | |
324 | Select this to see the detailed log message that shows what | |
5455d700 | 325 | happens in the IOMMU driver. |
2a96536e | 326 | |
5455d700 | 327 | Say N unless you need kernel log message for IOMMU debugging. |
2a96536e | 328 | |
d25a2a16 LP |
329 | config IPMMU_VMSA |
330 | bool "Renesas VMSA-compatible IPMMU" | |
3ae47292 | 331 | depends on ARM || IOMMU_DMA |
a4aaeccc | 332 | depends on ARCH_RENESAS || (COMPILE_TEST && !GENERIC_ATOMIC64) |
d25a2a16 | 333 | select IOMMU_API |
f20ed39f | 334 | select IOMMU_IO_PGTABLE_LPAE |
d25a2a16 LP |
335 | select ARM_DMA_USE_IOMMU |
336 | help | |
15021d36 GU |
337 | Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile |
338 | APE6, R-Car Gen2, and R-Car Gen3 SoCs. | |
d25a2a16 LP |
339 | |
340 | If unsure, say N. | |
341 | ||
4e13c1ac AK |
342 | config SPAPR_TCE_IOMMU |
343 | bool "sPAPR TCE IOMMU Support" | |
5b25199e | 344 | depends on PPC_POWERNV || PPC_PSERIES |
4e13c1ac AK |
345 | select IOMMU_API |
346 | help | |
347 | Enables bits of IOMMU API required by VFIO. The iommu_ops | |
348 | is not implemented as it is not necessary for VFIO. | |
349 | ||
48ec83bc | 350 | # ARM IOMMU support |
45ae7cff WD |
351 | config ARM_SMMU |
352 | bool "ARM Ltd. System MMU (SMMU) Support" | |
a20cc76b | 353 | depends on (ARM64 || ARM) && MMU |
45ae7cff | 354 | select IOMMU_API |
518f7136 | 355 | select IOMMU_IO_PGTABLE_LPAE |
45ae7cff WD |
356 | select ARM_DMA_USE_IOMMU if ARM |
357 | help | |
358 | Support for implementations of the ARM System MMU architecture | |
518f7136 | 359 | versions 1 and 2. |
45ae7cff WD |
360 | |
361 | Say Y here if your SoC includes an IOMMU device implementing | |
362 | the ARM SMMU architecture. | |
363 | ||
954a03be DA |
364 | config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT |
365 | bool "Default to disabling bypass on ARM SMMU v1 and v2" | |
366 | depends on ARM_SMMU | |
367 | default y | |
368 | help | |
369 | Say Y here to (by default) disable bypass streams such that | |
370 | incoming transactions from devices that are not attached to | |
371 | an iommu domain will report an abort back to the device and | |
372 | will not be allowed to pass through the SMMU. | |
373 | ||
374 | Any old kernels that existed before this KConfig was | |
375 | introduced would default to _allowing_ bypass (AKA the | |
376 | equivalent of NO for this config). However the default for | |
377 | this option is YES because the old behavior is insecure. | |
378 | ||
379 | There are few reasons to allow unmatched stream bypass, and | |
380 | even fewer good ones. If saying YES here breaks your board | |
381 | you should work on fixing your board. This KConfig option | |
382 | is expected to be removed in the future and we'll simply | |
383 | hardcode the bypass disable in the code. | |
384 | ||
385 | NOTE: the kernel command line parameter | |
386 | 'arm-smmu.disable_bypass' will continue to override this | |
387 | config. | |
388 | ||
48ec83bc WD |
389 | config ARM_SMMU_V3 |
390 | bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" | |
08d4ca2a | 391 | depends on ARM64 |
48ec83bc WD |
392 | select IOMMU_API |
393 | select IOMMU_IO_PGTABLE_LPAE | |
166bdbd2 | 394 | select GENERIC_MSI_IRQ_DOMAIN |
48ec83bc WD |
395 | help |
396 | Support for implementations of the ARM System MMU architecture | |
397 | version 3 providing translation support to a PCIe root complex. | |
398 | ||
399 | Say Y here if your system includes an IOMMU device implementing | |
400 | the ARM SMMUv3 architecture. | |
401 | ||
8128f23c GS |
402 | config S390_IOMMU |
403 | def_bool y if S390 && PCI | |
404 | depends on S390 && PCI | |
405 | select IOMMU_API | |
406 | help | |
407 | Support for the IOMMU API for s390 PCI devices. | |
408 | ||
63f1934d DJS |
409 | config S390_CCW_IOMMU |
410 | bool "S390 CCW IOMMU Support" | |
411 | depends on S390 && CCW | |
412 | select IOMMU_API | |
413 | help | |
414 | Enables bits of IOMMU API required by VFIO. The iommu_ops | |
415 | is not implemented as it is not necessary for VFIO. | |
416 | ||
1fde5734 TK |
417 | config S390_AP_IOMMU |
418 | bool "S390 AP IOMMU Support" | |
419 | depends on S390 && ZCRYPT | |
420 | select IOMMU_API | |
421 | help | |
422 | Enables bits of IOMMU API required by VFIO. The iommu_ops | |
423 | is not implemented as it is not necessary for VFIO. | |
424 | ||
0df4fabe YW |
425 | config MTK_IOMMU |
426 | bool "MTK IOMMU Support" | |
427 | depends on ARM || ARM64 | |
428 | depends on ARCH_MEDIATEK || COMPILE_TEST | |
1928832f | 429 | select ARM_DMA_USE_IOMMU |
0df4fabe YW |
430 | select IOMMU_API |
431 | select IOMMU_DMA | |
432 | select IOMMU_IO_PGTABLE_ARMV7S | |
433 | select MEMORY | |
434 | select MTK_SMI | |
435 | help | |
436 | Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia | |
437 | Memory Management Unit. This option enables remapping of DMA memory | |
438 | accesses for the multimedia subsystem. | |
439 | ||
440 | If unsure, say N here. | |
441 | ||
b17336c5 HZ |
442 | config MTK_IOMMU_V1 |
443 | bool "MTK IOMMU Version 1 (M4U gen1) Support" | |
444 | depends on ARM | |
445 | depends on ARCH_MEDIATEK || COMPILE_TEST | |
446 | select ARM_DMA_USE_IOMMU | |
447 | select IOMMU_API | |
448 | select MEMORY | |
449 | select MTK_SMI | |
b17336c5 HZ |
450 | help |
451 | Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is | |
452 | Multimedia Memory Managememt Unit. This option enables remapping of | |
453 | DMA memory accesses for the multimedia subsystem. | |
454 | ||
455 | if unsure, say N here. | |
456 | ||
0ae349a0 RC |
457 | config QCOM_IOMMU |
458 | # Note: iommu drivers cannot (yet?) be built as modules | |
459 | bool "Qualcomm IOMMU Support" | |
a4aaeccc | 460 | depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64) |
0ae349a0 RC |
461 | select IOMMU_API |
462 | select IOMMU_IO_PGTABLE_LPAE | |
463 | select ARM_DMA_USE_IOMMU | |
464 | help | |
465 | Support for IOMMU on certain Qualcomm SoCs. | |
466 | ||
29217a47 LT |
467 | config HYPERV_IOMMU |
468 | bool "Hyper-V x2APIC IRQ Handling" | |
469 | depends on HYPERV | |
470 | select IOMMU_API | |
471 | default HYPERV | |
472 | help | |
473 | Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux | |
474 | guests to run with x2APIC mode enabled. | |
475 | ||
edcd69ab JPB |
476 | config VIRTIO_IOMMU |
477 | bool "Virtio IOMMU driver" | |
478 | depends on VIRTIO=y | |
479 | depends on ARM64 | |
480 | select IOMMU_API | |
481 | select INTERVAL_TREE | |
482 | help | |
483 | Para-virtualised IOMMU driver with virtio. | |
484 | ||
485 | Say Y here if you intend to run this kernel as a guest. | |
486 | ||
68255b62 | 487 | endif # IOMMU_SUPPORT |