xref: /openbmc/linux/drivers/iommu/Kconfig (revision c0e297dc) 
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 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	bool
46
47config OF_IOMMU
48       def_bool y
49       depends on OF && IOMMU_API
50
51config FSL_PAMU
52	bool "Freescale IOMMU support"
53	depends on PPC32
54	depends on PPC_E500MC || COMPILE_TEST
55	select IOMMU_API
56	select GENERIC_ALLOCATOR
57	help
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
60	  transaction types.
61
62# MSM IOMMU support
63config MSM_IOMMU
64	bool "MSM IOMMU Support"
65	depends on ARM
66	depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
67	depends on BROKEN
68	select IOMMU_API
69	help
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.
73
74	  If unsure, say N here.
75
76config IOMMU_PGTABLES_L2
77	def_bool y
78	depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
79
80# AMD IOMMU support
81config AMD_IOMMU
82	bool "AMD IOMMU support"
83	select SWIOTLB
84	select PCI_MSI
85	select PCI_ATS
86	select PCI_PRI
87	select PCI_PASID
88	select IOMMU_API
89	depends on X86_64 && PCI && ACPI
90	---help---
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.
96
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
99	  table.
100
101config AMD_IOMMU_STATS
102	bool "Export AMD IOMMU statistics to debugfs"
103	depends on AMD_IOMMU
104	select DEBUG_FS
105	---help---
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.
109	  If unsure, say N.
110
111config AMD_IOMMU_V2
112	tristate "AMD IOMMU Version 2 driver"
113	depends on AMD_IOMMU
114	select MMU_NOTIFIER
115	---help---
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.
119
120# Intel IOMMU support
121config DMAR_TABLE
122	bool
123
124config INTEL_IOMMU
125	bool "Support for Intel IOMMU using DMA Remapping Devices"
126	depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
127	select IOMMU_API
128	select IOMMU_IOVA
129	select DMAR_TABLE
130	help
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
135	  remapping devices.
136
137config INTEL_IOMMU_DEFAULT_ON
138	def_bool y
139	prompt "Enable Intel DMA Remapping Devices by default"
140	depends on INTEL_IOMMU
141	help
142	  Selecting this option will enable a DMAR device at boot time if
143	  one is found. If this option is not selected, DMAR support can
144	  be enabled by passing intel_iommu=on to the kernel.
145
146config INTEL_IOMMU_BROKEN_GFX_WA
147	bool "Workaround broken graphics drivers (going away soon)"
148	depends on INTEL_IOMMU && BROKEN && X86
149	---help---
150	  Current Graphics drivers tend to use physical address
151	  for DMA and avoid using DMA APIs. Setting this config
152	  option permits the IOMMU driver to set a unity map for
153	  all the OS-visible memory. Hence the driver can continue
154	  to use physical addresses for DMA, at least until this
155	  option is removed in the 2.6.32 kernel.
156
157config INTEL_IOMMU_FLOPPY_WA
158	def_bool y
159	depends on INTEL_IOMMU && X86
160	---help---
161	  Floppy disk drivers are known to bypass DMA API calls
162	  thereby failing to work when IOMMU is enabled. This
163	  workaround will setup a 1:1 mapping for the first
164	  16MiB to make floppy (an ISA device) work.
165
166config IRQ_REMAP
167	bool "Support for Interrupt Remapping"
168	depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
169	select DMAR_TABLE
170	---help---
171	  Supports Interrupt remapping for IO-APIC and MSI devices.
172	  To use x2apic mode in the CPU's which support x2APIC enhancements or
173	  to support platforms with CPU's having > 8 bit APIC ID, say Y.
174
175# OMAP IOMMU support
176config OMAP_IOMMU
177	bool "OMAP IOMMU Support"
178	depends on ARM && MMU
179	depends on ARCH_OMAP2PLUS || COMPILE_TEST
180	select IOMMU_API
181	---help---
182	  The OMAP3 media platform drivers depend on iommu support,
183	  if you need them say Y here.
184
185config OMAP_IOMMU_DEBUG
186	bool "Export OMAP IOMMU internals in DebugFS"
187	depends on OMAP_IOMMU && DEBUG_FS
188	---help---
189	  Select this to see extensive information about
190	  the internal state of OMAP IOMMU in debugfs.
191
192	  Say N unless you know you need this.
193
194config ROCKCHIP_IOMMU
195	bool "Rockchip IOMMU Support"
196	depends on ARM
197	depends on ARCH_ROCKCHIP || COMPILE_TEST
198	select IOMMU_API
199	select ARM_DMA_USE_IOMMU
200	help
201	  Support for IOMMUs found on Rockchip rk32xx SOCs.
202	  These IOMMUs allow virtualization of the address space used by most
203	  cores within the multimedia subsystem.
204	  Say Y here if you are using a Rockchip SoC that includes an IOMMU
205	  device.
206
207config TEGRA_IOMMU_GART
208	bool "Tegra GART IOMMU Support"
209	depends on ARCH_TEGRA_2x_SOC
210	select IOMMU_API
211	help
212	  Enables support for remapping discontiguous physical memory
213	  shared with the operating system into contiguous I/O virtual
214	  space through the GART (Graphics Address Relocation Table)
215	  hardware included on Tegra SoCs.
216
217config TEGRA_IOMMU_SMMU
218	bool "NVIDIA Tegra SMMU Support"
219	depends on ARCH_TEGRA
220	depends on TEGRA_AHB
221	depends on TEGRA_MC
222	select IOMMU_API
223	help
224	  This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
225	  SoCs (Tegra30 up to Tegra132).
226
227config EXYNOS_IOMMU
228	bool "Exynos IOMMU Support"
229	depends on ARCH_EXYNOS && ARM && MMU
230	select IOMMU_API
231	select ARM_DMA_USE_IOMMU
232	help
233	  Support for the IOMMU (System MMU) of Samsung Exynos application
234	  processor family. This enables H/W multimedia accelerators to see
235	  non-linear physical memory chunks as linear memory in their
236	  address space.
237
238	  If unsure, say N here.
239
240config EXYNOS_IOMMU_DEBUG
241	bool "Debugging log for Exynos IOMMU"
242	depends on EXYNOS_IOMMU
243	help
244	  Select this to see the detailed log message that shows what
245	  happens in the IOMMU driver.
246
247	  Say N unless you need kernel log message for IOMMU debugging.
248
249config SHMOBILE_IPMMU
250	bool
251
252config SHMOBILE_IPMMU_TLB
253	bool
254
255config SHMOBILE_IOMMU
256	bool "IOMMU for Renesas IPMMU/IPMMUI"
257	default n
258	depends on ARM && MMU
259	depends on ARCH_SHMOBILE || COMPILE_TEST
260	select IOMMU_API
261	select ARM_DMA_USE_IOMMU
262	select SHMOBILE_IPMMU
263	select SHMOBILE_IPMMU_TLB
264	help
265	  Support for Renesas IPMMU/IPMMUI. This option enables
266	  remapping of DMA memory accesses from all of the IP blocks
267	  on the ICB.
268
269	  Warning: Drivers (including userspace drivers of UIO
270	  devices) of the IP blocks on the ICB *must* use addresses
271	  allocated from the IPMMU (iova) for DMA with this option
272	  enabled.
273
274	  If unsure, say N.
275
276choice
277	prompt "IPMMU/IPMMUI address space size"
278	default SHMOBILE_IOMMU_ADDRSIZE_2048MB
279	depends on SHMOBILE_IOMMU
280	help
281	  This option sets IPMMU/IPMMUI address space size by
282	  adjusting the 1st level page table size. The page table size
283	  is calculated as follows:
284
285	      page table size = number of page table entries * 4 bytes
286	      number of page table entries = address space size / 1 MiB
287
288	  For example, when the address space size is 2048 MiB, the
289	  1st level page table size is 8192 bytes.
290
291	config SHMOBILE_IOMMU_ADDRSIZE_2048MB
292		bool "2 GiB"
293
294	config SHMOBILE_IOMMU_ADDRSIZE_1024MB
295		bool "1 GiB"
296
297	config SHMOBILE_IOMMU_ADDRSIZE_512MB
298		bool "512 MiB"
299
300	config SHMOBILE_IOMMU_ADDRSIZE_256MB
301		bool "256 MiB"
302
303	config SHMOBILE_IOMMU_ADDRSIZE_128MB
304		bool "128 MiB"
305
306	config SHMOBILE_IOMMU_ADDRSIZE_64MB
307		bool "64 MiB"
308
309	config SHMOBILE_IOMMU_ADDRSIZE_32MB
310		bool "32 MiB"
311
312endchoice
313
314config SHMOBILE_IOMMU_L1SIZE
315	int
316	default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
317	default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
318	default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
319	default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
320	default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
321	default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
322	default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
323
324config IPMMU_VMSA
325	bool "Renesas VMSA-compatible IPMMU"
326	depends on ARM_LPAE
327	depends on ARCH_SHMOBILE || COMPILE_TEST
328	select IOMMU_API
329	select IOMMU_IO_PGTABLE_LPAE
330	select ARM_DMA_USE_IOMMU
331	help
332	  Support for the Renesas VMSA-compatible IPMMU Renesas found in the
333	  R-Mobile APE6 and R-Car H2/M2 SoCs.
334
335	  If unsure, say N.
336
337config SPAPR_TCE_IOMMU
338	bool "sPAPR TCE IOMMU Support"
339	depends on PPC_POWERNV || PPC_PSERIES
340	select IOMMU_API
341	help
342	  Enables bits of IOMMU API required by VFIO. The iommu_ops
343	  is not implemented as it is not necessary for VFIO.
344
345# ARM IOMMU support
346config ARM_SMMU
347	bool "ARM Ltd. System MMU (SMMU) Support"
348	depends on (ARM64 || ARM) && MMU
349	select IOMMU_API
350	select IOMMU_IO_PGTABLE_LPAE
351	select ARM_DMA_USE_IOMMU if ARM
352	help
353	  Support for implementations of the ARM System MMU architecture
354	  versions 1 and 2.
355
356	  Say Y here if your SoC includes an IOMMU device implementing
357	  the ARM SMMU architecture.
358
359config ARM_SMMU_V3
360	bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
361	depends on ARM64 && PCI
362	select IOMMU_API
363	select IOMMU_IO_PGTABLE_LPAE
364	help
365	  Support for implementations of the ARM System MMU architecture
366	  version 3 providing translation support to a PCIe root complex.
367
368	  Say Y here if your system includes an IOMMU device implementing
369	  the ARM SMMUv3 architecture.
370
371endif # IOMMU_SUPPORT
372