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
42endmenu
43
44config IOMMU_IOVA
45	tristate
46
47config OF_IOMMU
48       def_bool y
49       depends on OF && IOMMU_API
50
51# IOMMU-agnostic DMA-mapping layer
52config IOMMU_DMA
53	bool
54	depends on NEED_SG_DMA_LENGTH
55	select IOMMU_API
56	select IOMMU_IOVA
57
58config FSL_PAMU
59	bool "Freescale IOMMU support"
60	depends on PPC32
61	depends on PPC_E500MC || COMPILE_TEST
62	select IOMMU_API
63	select GENERIC_ALLOCATOR
64	help
65	  Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
66	  PAMU can authorize memory access, remap the memory address, and remap I/O
67	  transaction types.
68
69# MSM IOMMU support
70config MSM_IOMMU
71	bool "MSM IOMMU Support"
72	depends on ARM
73	depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
74	depends on BROKEN
75	select IOMMU_API
76	help
77	  Support for the IOMMUs found on certain Qualcomm SOCs.
78	  These IOMMUs allow virtualization of the address space used by most
79	  cores within the multimedia subsystem.
80
81	  If unsure, say N here.
82
83config IOMMU_PGTABLES_L2
84	def_bool y
85	depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
86
87# AMD IOMMU support
88config AMD_IOMMU
89	bool "AMD IOMMU support"
90	select SWIOTLB
91	select PCI_MSI
92	select PCI_ATS
93	select PCI_PRI
94	select PCI_PASID
95	select IOMMU_API
96	depends on X86_64 && PCI && ACPI
97	---help---
98	  With this option you can enable support for AMD IOMMU hardware in
99	  your system. An IOMMU is a hardware component which provides
100	  remapping of DMA memory accesses from devices. With an AMD IOMMU you
101	  can isolate the DMA memory of different devices and protect the
102	  system from misbehaving device drivers or hardware.
103
104	  You can find out if your system has an AMD IOMMU if you look into
105	  your BIOS for an option to enable it or if you have an IVRS ACPI
106	  table.
107
108config AMD_IOMMU_STATS
109	bool "Export AMD IOMMU statistics to debugfs"
110	depends on AMD_IOMMU
111	select DEBUG_FS
112	---help---
113	  This option enables code in the AMD IOMMU driver to collect various
114	  statistics about whats happening in the driver and exports that
115	  information to userspace via debugfs.
116	  If unsure, say N.
117
118config AMD_IOMMU_V2
119	tristate "AMD IOMMU Version 2 driver"
120	depends on AMD_IOMMU
121	select MMU_NOTIFIER
122	---help---
123	  This option enables support for the AMD IOMMUv2 features of the IOMMU
124	  hardware. Select this option if you want to use devices that support
125	  the PCI PRI and PASID interface.
126
127# Intel IOMMU support
128config DMAR_TABLE
129	bool
130
131config INTEL_IOMMU
132	bool "Support for Intel IOMMU using DMA Remapping Devices"
133	depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
134	select IOMMU_API
135	select IOMMU_IOVA
136	select DMAR_TABLE
137	help
138	  DMA remapping (DMAR) devices support enables independent address
139	  translations for Direct Memory Access (DMA) from devices.
140	  These DMA remapping devices are reported via ACPI tables
141	  and include PCI device scope covered by these DMA
142	  remapping devices.
143
144config INTEL_IOMMU_SVM
145	bool "Support for Shared Virtual Memory with Intel IOMMU"
146	depends on INTEL_IOMMU && X86
147	select PCI_PASID
148	select MMU_NOTIFIER
149	help
150	  Shared Virtual Memory (SVM) provides a facility for devices
151	  to access DMA resources through process address space by
152	  means of a Process Address Space ID (PASID).
153
154config INTEL_IOMMU_DEFAULT_ON
155	def_bool y
156	prompt "Enable Intel DMA Remapping Devices by default"
157	depends on INTEL_IOMMU
158	help
159	  Selecting this option will enable a DMAR device at boot time if
160	  one is found. If this option is not selected, DMAR support can
161	  be enabled by passing intel_iommu=on to the kernel.
162
163config INTEL_IOMMU_BROKEN_GFX_WA
164	bool "Workaround broken graphics drivers (going away soon)"
165	depends on INTEL_IOMMU && BROKEN && X86
166	---help---
167	  Current Graphics drivers tend to use physical address
168	  for DMA and avoid using DMA APIs. Setting this config
169	  option permits the IOMMU driver to set a unity map for
170	  all the OS-visible memory. Hence the driver can continue
171	  to use physical addresses for DMA, at least until this
172	  option is removed in the 2.6.32 kernel.
173
174config INTEL_IOMMU_FLOPPY_WA
175	def_bool y
176	depends on INTEL_IOMMU && X86
177	---help---
178	  Floppy disk drivers are known to bypass DMA API calls
179	  thereby failing to work when IOMMU is enabled. This
180	  workaround will setup a 1:1 mapping for the first
181	  16MiB to make floppy (an ISA device) work.
182
183config IRQ_REMAP
184	bool "Support for Interrupt Remapping"
185	depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
186	select DMAR_TABLE
187	---help---
188	  Supports Interrupt remapping for IO-APIC and MSI devices.
189	  To use x2apic mode in the CPU's which support x2APIC enhancements or
190	  to support platforms with CPU's having > 8 bit APIC ID, say Y.
191
192# OMAP IOMMU support
193config OMAP_IOMMU
194	bool "OMAP IOMMU Support"
195	depends on ARM && MMU
196	depends on ARCH_OMAP2PLUS || COMPILE_TEST
197	select IOMMU_API
198	---help---
199	  The OMAP3 media platform drivers depend on iommu support,
200	  if you need them say Y here.
201
202config OMAP_IOMMU_DEBUG
203	bool "Export OMAP IOMMU internals in DebugFS"
204	depends on OMAP_IOMMU && DEBUG_FS
205	---help---
206	  Select this to see extensive information about
207	  the internal state of OMAP IOMMU in debugfs.
208
209	  Say N unless you know you need this.
210
211config ROCKCHIP_IOMMU
212	bool "Rockchip IOMMU Support"
213	depends on ARM
214	depends on ARCH_ROCKCHIP || COMPILE_TEST
215	select IOMMU_API
216	select ARM_DMA_USE_IOMMU
217	help
218	  Support for IOMMUs found on Rockchip rk32xx SOCs.
219	  These IOMMUs allow virtualization of the address space used by most
220	  cores within the multimedia subsystem.
221	  Say Y here if you are using a Rockchip SoC that includes an IOMMU
222	  device.
223
224config TEGRA_IOMMU_GART
225	bool "Tegra GART IOMMU Support"
226	depends on ARCH_TEGRA_2x_SOC
227	select IOMMU_API
228	help
229	  Enables support for remapping discontiguous physical memory
230	  shared with the operating system into contiguous I/O virtual
231	  space through the GART (Graphics Address Relocation Table)
232	  hardware included on Tegra SoCs.
233
234config TEGRA_IOMMU_SMMU
235	bool "NVIDIA Tegra SMMU Support"
236	depends on ARCH_TEGRA
237	depends on TEGRA_AHB
238	depends on TEGRA_MC
239	select IOMMU_API
240	help
241	  This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
242	  SoCs (Tegra30 up to Tegra210).
243
244config EXYNOS_IOMMU
245	bool "Exynos IOMMU Support"
246	depends on ARCH_EXYNOS && ARM && MMU
247	select IOMMU_API
248	select ARM_DMA_USE_IOMMU
249	help
250	  Support for the IOMMU (System MMU) of Samsung Exynos application
251	  processor family. This enables H/W multimedia accelerators to see
252	  non-linear physical memory chunks as linear memory in their
253	  address space.
254
255	  If unsure, say N here.
256
257config EXYNOS_IOMMU_DEBUG
258	bool "Debugging log for Exynos IOMMU"
259	depends on EXYNOS_IOMMU
260	help
261	  Select this to see the detailed log message that shows what
262	  happens in the IOMMU driver.
263
264	  Say N unless you need kernel log message for IOMMU debugging.
265
266config SHMOBILE_IPMMU
267	bool
268
269config SHMOBILE_IPMMU_TLB
270	bool
271
272config SHMOBILE_IOMMU
273	bool "IOMMU for Renesas IPMMU/IPMMUI"
274	default n
275	depends on ARM && MMU
276	depends on ARCH_SHMOBILE || COMPILE_TEST
277	select IOMMU_API
278	select ARM_DMA_USE_IOMMU
279	select SHMOBILE_IPMMU
280	select SHMOBILE_IPMMU_TLB
281	help
282	  Support for Renesas IPMMU/IPMMUI. This option enables
283	  remapping of DMA memory accesses from all of the IP blocks
284	  on the ICB.
285
286	  Warning: Drivers (including userspace drivers of UIO
287	  devices) of the IP blocks on the ICB *must* use addresses
288	  allocated from the IPMMU (iova) for DMA with this option
289	  enabled.
290
291	  If unsure, say N.
292
293choice
294	prompt "IPMMU/IPMMUI address space size"
295	default SHMOBILE_IOMMU_ADDRSIZE_2048MB
296	depends on SHMOBILE_IOMMU
297	help
298	  This option sets IPMMU/IPMMUI address space size by
299	  adjusting the 1st level page table size. The page table size
300	  is calculated as follows:
301
302	      page table size = number of page table entries * 4 bytes
303	      number of page table entries = address space size / 1 MiB
304
305	  For example, when the address space size is 2048 MiB, the
306	  1st level page table size is 8192 bytes.
307
308	config SHMOBILE_IOMMU_ADDRSIZE_2048MB
309		bool "2 GiB"
310
311	config SHMOBILE_IOMMU_ADDRSIZE_1024MB
312		bool "1 GiB"
313
314	config SHMOBILE_IOMMU_ADDRSIZE_512MB
315		bool "512 MiB"
316
317	config SHMOBILE_IOMMU_ADDRSIZE_256MB
318		bool "256 MiB"
319
320	config SHMOBILE_IOMMU_ADDRSIZE_128MB
321		bool "128 MiB"
322
323	config SHMOBILE_IOMMU_ADDRSIZE_64MB
324		bool "64 MiB"
325
326	config SHMOBILE_IOMMU_ADDRSIZE_32MB
327		bool "32 MiB"
328
329endchoice
330
331config SHMOBILE_IOMMU_L1SIZE
332	int
333	default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
334	default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
335	default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
336	default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
337	default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
338	default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
339	default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
340
341config IPMMU_VMSA
342	bool "Renesas VMSA-compatible IPMMU"
343	depends on ARM_LPAE
344	depends on ARCH_SHMOBILE || COMPILE_TEST
345	select IOMMU_API
346	select IOMMU_IO_PGTABLE_LPAE
347	select ARM_DMA_USE_IOMMU
348	help
349	  Support for the Renesas VMSA-compatible IPMMU Renesas found in the
350	  R-Mobile APE6 and R-Car H2/M2 SoCs.
351
352	  If unsure, say N.
353
354config SPAPR_TCE_IOMMU
355	bool "sPAPR TCE IOMMU Support"
356	depends on PPC_POWERNV || PPC_PSERIES
357	select IOMMU_API
358	help
359	  Enables bits of IOMMU API required by VFIO. The iommu_ops
360	  is not implemented as it is not necessary for VFIO.
361
362# ARM IOMMU support
363config ARM_SMMU
364	bool "ARM Ltd. System MMU (SMMU) Support"
365	depends on (ARM64 || ARM) && MMU
366	select IOMMU_API
367	select IOMMU_IO_PGTABLE_LPAE
368	select ARM_DMA_USE_IOMMU if ARM
369	help
370	  Support for implementations of the ARM System MMU architecture
371	  versions 1 and 2.
372
373	  Say Y here if your SoC includes an IOMMU device implementing
374	  the ARM SMMU architecture.
375
376config ARM_SMMU_V3
377	bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
378	depends on ARM64 && PCI
379	select IOMMU_API
380	select IOMMU_IO_PGTABLE_LPAE
381	select GENERIC_MSI_IRQ_DOMAIN
382	help
383	  Support for implementations of the ARM System MMU architecture
384	  version 3 providing translation support to a PCIe root complex.
385
386	  Say Y here if your system includes an IOMMU device implementing
387	  the ARM SMMUv3 architecture.
388
389config S390_IOMMU
390	def_bool y if S390 && PCI
391	depends on S390 && PCI
392	select IOMMU_API
393	help
394	  Support for the IOMMU API for s390 PCI devices.
395
396endif # IOMMU_SUPPORT
397