xref: /openbmc/linux/drivers/iommu/Kconfig (revision 8b235f2f) 
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	# SWIOTLB guarantees a dma_to_phys() implementation
27	depends on ARM || ARM64 || (COMPILE_TEST && SWIOTLB)
28	help
29	  Enable support for the ARM long descriptor pagetable format.
30	  This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
31	  sizes at both stage-1 and stage-2, as well as address spaces
32	  up to 48-bits in size.
33
34config IOMMU_IO_PGTABLE_LPAE_SELFTEST
35	bool "LPAE selftests"
36	depends on IOMMU_IO_PGTABLE_LPAE
37	help
38	  Enable self-tests for LPAE page table allocator. This performs
39	  a series of page-table consistency checks during boot.
40
41	  If unsure, say N here.
42
43endmenu
44
45config IOMMU_IOVA
46	bool
47
48config OF_IOMMU
49       def_bool y
50       depends on OF && IOMMU_API
51
52config FSL_PAMU
53	bool "Freescale IOMMU support"
54	depends on PPC32
55	depends on PPC_E500MC || COMPILE_TEST
56	select IOMMU_API
57	select GENERIC_ALLOCATOR
58	help
59	  Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
60	  PAMU can authorize memory access, remap the memory address, and remap I/O
61	  transaction types.
62
63# MSM IOMMU support
64config MSM_IOMMU
65	bool "MSM IOMMU Support"
66	depends on ARM
67	depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
68	depends on BROKEN
69	select IOMMU_API
70	help
71	  Support for the IOMMUs found on certain Qualcomm SOCs.
72	  These IOMMUs allow virtualization of the address space used by most
73	  cores within the multimedia subsystem.
74
75	  If unsure, say N here.
76
77config IOMMU_PGTABLES_L2
78	def_bool y
79	depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
80
81# AMD IOMMU support
82config AMD_IOMMU
83	bool "AMD IOMMU support"
84	select SWIOTLB
85	select PCI_MSI
86	select PCI_ATS
87	select PCI_PRI
88	select PCI_PASID
89	select IOMMU_API
90	depends on X86_64 && PCI && ACPI
91	---help---
92	  With this option you can enable support for AMD IOMMU hardware in
93	  your system. An IOMMU is a hardware component which provides
94	  remapping of DMA memory accesses from devices. With an AMD IOMMU you
95	  can isolate the DMA memory of different devices and protect the
96	  system from misbehaving device drivers or hardware.
97
98	  You can find out if your system has an AMD IOMMU if you look into
99	  your BIOS for an option to enable it or if you have an IVRS ACPI
100	  table.
101
102config AMD_IOMMU_STATS
103	bool "Export AMD IOMMU statistics to debugfs"
104	depends on AMD_IOMMU
105	select DEBUG_FS
106	---help---
107	  This option enables code in the AMD IOMMU driver to collect various
108	  statistics about whats happening in the driver and exports that
109	  information to userspace via debugfs.
110	  If unsure, say N.
111
112config AMD_IOMMU_V2
113	tristate "AMD IOMMU Version 2 driver"
114	depends on AMD_IOMMU
115	select MMU_NOTIFIER
116	---help---
117	  This option enables support for the AMD IOMMUv2 features of the IOMMU
118	  hardware. Select this option if you want to use devices that support
119	  the PCI PRI and PASID interface.
120
121# Intel IOMMU support
122config DMAR_TABLE
123	bool
124
125config INTEL_IOMMU
126	bool "Support for Intel IOMMU using DMA Remapping Devices"
127	depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
128	select IOMMU_API
129	select IOMMU_IOVA
130	select DMAR_TABLE
131	help
132	  DMA remapping (DMAR) devices support enables independent address
133	  translations for Direct Memory Access (DMA) from devices.
134	  These DMA remapping devices are reported via ACPI tables
135	  and include PCI device scope covered by these DMA
136	  remapping devices.
137
138config INTEL_IOMMU_DEFAULT_ON
139	def_bool y
140	prompt "Enable Intel DMA Remapping Devices by default"
141	depends on INTEL_IOMMU
142	help
143	  Selecting this option will enable a DMAR device at boot time if
144	  one is found. If this option is not selected, DMAR support can
145	  be enabled by passing intel_iommu=on to the kernel.
146
147config INTEL_IOMMU_BROKEN_GFX_WA
148	bool "Workaround broken graphics drivers (going away soon)"
149	depends on INTEL_IOMMU && BROKEN && X86
150	---help---
151	  Current Graphics drivers tend to use physical address
152	  for DMA and avoid using DMA APIs. Setting this config
153	  option permits the IOMMU driver to set a unity map for
154	  all the OS-visible memory. Hence the driver can continue
155	  to use physical addresses for DMA, at least until this
156	  option is removed in the 2.6.32 kernel.
157
158config INTEL_IOMMU_FLOPPY_WA
159	def_bool y
160	depends on INTEL_IOMMU && X86
161	---help---
162	  Floppy disk drivers are known to bypass DMA API calls
163	  thereby failing to work when IOMMU is enabled. This
164	  workaround will setup a 1:1 mapping for the first
165	  16MiB to make floppy (an ISA device) work.
166
167config IRQ_REMAP
168	bool "Support for Interrupt Remapping"
169	depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
170	select DMAR_TABLE
171	---help---
172	  Supports Interrupt remapping for IO-APIC and MSI devices.
173	  To use x2apic mode in the CPU's which support x2APIC enhancements or
174	  to support platforms with CPU's having > 8 bit APIC ID, say Y.
175
176# OMAP IOMMU support
177config OMAP_IOMMU
178	bool "OMAP IOMMU Support"
179	depends on ARM && MMU
180	depends on ARCH_OMAP2PLUS || COMPILE_TEST
181	select IOMMU_API
182	---help---
183	  The OMAP3 media platform drivers depend on iommu support,
184	  if you need them say Y here.
185
186config OMAP_IOMMU_DEBUG
187	bool "Export OMAP IOMMU internals in DebugFS"
188	depends on OMAP_IOMMU && DEBUG_FS
189	---help---
190	  Select this to see extensive information about
191	  the internal state of OMAP IOMMU in debugfs.
192
193	  Say N unless you know you need this.
194
195config ROCKCHIP_IOMMU
196	bool "Rockchip IOMMU Support"
197	depends on ARM
198	depends on ARCH_ROCKCHIP || COMPILE_TEST
199	select IOMMU_API
200	select ARM_DMA_USE_IOMMU
201	help
202	  Support for IOMMUs found on Rockchip rk32xx SOCs.
203	  These IOMMUs allow virtualization of the address space used by most
204	  cores within the multimedia subsystem.
205	  Say Y here if you are using a Rockchip SoC that includes an IOMMU
206	  device.
207
208config TEGRA_IOMMU_GART
209	bool "Tegra GART IOMMU Support"
210	depends on ARCH_TEGRA_2x_SOC
211	select IOMMU_API
212	help
213	  Enables support for remapping discontiguous physical memory
214	  shared with the operating system into contiguous I/O virtual
215	  space through the GART (Graphics Address Relocation Table)
216	  hardware included on Tegra SoCs.
217
218config TEGRA_IOMMU_SMMU
219	bool "NVIDIA Tegra SMMU Support"
220	depends on ARCH_TEGRA
221	depends on TEGRA_AHB
222	depends on TEGRA_MC
223	select IOMMU_API
224	help
225	  This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
226	  SoCs (Tegra30 up to Tegra210).
227
228config EXYNOS_IOMMU
229	bool "Exynos IOMMU Support"
230	depends on ARCH_EXYNOS && ARM && MMU
231	select IOMMU_API
232	select ARM_DMA_USE_IOMMU
233	help
234	  Support for the IOMMU (System MMU) of Samsung Exynos application
235	  processor family. This enables H/W multimedia accelerators to see
236	  non-linear physical memory chunks as linear memory in their
237	  address space.
238
239	  If unsure, say N here.
240
241config EXYNOS_IOMMU_DEBUG
242	bool "Debugging log for Exynos IOMMU"
243	depends on EXYNOS_IOMMU
244	help
245	  Select this to see the detailed log message that shows what
246	  happens in the IOMMU driver.
247
248	  Say N unless you need kernel log message for IOMMU debugging.
249
250config SHMOBILE_IPMMU
251	bool
252
253config SHMOBILE_IPMMU_TLB
254	bool
255
256config SHMOBILE_IOMMU
257	bool "IOMMU for Renesas IPMMU/IPMMUI"
258	default n
259	depends on ARM && MMU
260	depends on ARCH_SHMOBILE || COMPILE_TEST
261	select IOMMU_API
262	select ARM_DMA_USE_IOMMU
263	select SHMOBILE_IPMMU
264	select SHMOBILE_IPMMU_TLB
265	help
266	  Support for Renesas IPMMU/IPMMUI. This option enables
267	  remapping of DMA memory accesses from all of the IP blocks
268	  on the ICB.
269
270	  Warning: Drivers (including userspace drivers of UIO
271	  devices) of the IP blocks on the ICB *must* use addresses
272	  allocated from the IPMMU (iova) for DMA with this option
273	  enabled.
274
275	  If unsure, say N.
276
277choice
278	prompt "IPMMU/IPMMUI address space size"
279	default SHMOBILE_IOMMU_ADDRSIZE_2048MB
280	depends on SHMOBILE_IOMMU
281	help
282	  This option sets IPMMU/IPMMUI address space size by
283	  adjusting the 1st level page table size. The page table size
284	  is calculated as follows:
285
286	      page table size = number of page table entries * 4 bytes
287	      number of page table entries = address space size / 1 MiB
288
289	  For example, when the address space size is 2048 MiB, the
290	  1st level page table size is 8192 bytes.
291
292	config SHMOBILE_IOMMU_ADDRSIZE_2048MB
293		bool "2 GiB"
294
295	config SHMOBILE_IOMMU_ADDRSIZE_1024MB
296		bool "1 GiB"
297
298	config SHMOBILE_IOMMU_ADDRSIZE_512MB
299		bool "512 MiB"
300
301	config SHMOBILE_IOMMU_ADDRSIZE_256MB
302		bool "256 MiB"
303
304	config SHMOBILE_IOMMU_ADDRSIZE_128MB
305		bool "128 MiB"
306
307	config SHMOBILE_IOMMU_ADDRSIZE_64MB
308		bool "64 MiB"
309
310	config SHMOBILE_IOMMU_ADDRSIZE_32MB
311		bool "32 MiB"
312
313endchoice
314
315config SHMOBILE_IOMMU_L1SIZE
316	int
317	default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
318	default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
319	default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
320	default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
321	default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
322	default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
323	default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
324
325config IPMMU_VMSA
326	bool "Renesas VMSA-compatible IPMMU"
327	depends on ARM_LPAE
328	depends on ARCH_SHMOBILE || COMPILE_TEST
329	select IOMMU_API
330	select IOMMU_IO_PGTABLE_LPAE
331	select ARM_DMA_USE_IOMMU
332	help
333	  Support for the Renesas VMSA-compatible IPMMU Renesas found in the
334	  R-Mobile APE6 and R-Car H2/M2 SoCs.
335
336	  If unsure, say N.
337
338config SPAPR_TCE_IOMMU
339	bool "sPAPR TCE IOMMU Support"
340	depends on PPC_POWERNV || PPC_PSERIES
341	select IOMMU_API
342	help
343	  Enables bits of IOMMU API required by VFIO. The iommu_ops
344	  is not implemented as it is not necessary for VFIO.
345
346# ARM IOMMU support
347config ARM_SMMU
348	bool "ARM Ltd. System MMU (SMMU) Support"
349	depends on (ARM64 || ARM) && MMU
350	select IOMMU_API
351	select IOMMU_IO_PGTABLE_LPAE
352	select ARM_DMA_USE_IOMMU if ARM
353	help
354	  Support for implementations of the ARM System MMU architecture
355	  versions 1 and 2.
356
357	  Say Y here if your SoC includes an IOMMU device implementing
358	  the ARM SMMU architecture.
359
360config ARM_SMMU_V3
361	bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
362	depends on ARM64 && PCI
363	select IOMMU_API
364	select IOMMU_IO_PGTABLE_LPAE
365	help
366	  Support for implementations of the ARM System MMU architecture
367	  version 3 providing translation support to a PCIe root complex.
368
369	  Say Y here if your system includes an IOMMU device implementing
370	  the ARM SMMUv3 architecture.
371
372endif # IOMMU_SUPPORT
373