1 # IOMMU_API always gets selected by whoever wants it.
5 menuconfig IOMMU_SUPPORT
6 bool "IOMMU Hardware Support"
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
17 menu "Generic IOMMU Pagetable Support"
19 # Selected by the actual pagetable implementations
20 config IOMMU_IO_PGTABLE
23 config IOMMU_IO_PGTABLE_LPAE
24 bool "ARMv7/v8 Long Descriptor Format"
25 select IOMMU_IO_PGTABLE
26 depends on ARM || ARM64 || COMPILE_TEST
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.
33 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
35 depends on IOMMU_IO_PGTABLE_LPAE
37 Enable self-tests for LPAE page table allocator. This performs
38 a series of page-table consistency checks during boot.
40 If unsure, say N here.
49 depends on OF && IOMMU_API
52 bool "Freescale IOMMU support"
54 depends on PPC_E500MC || COMPILE_TEST
56 select GENERIC_ALLOCATOR
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
64 bool "MSM IOMMU Support"
66 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
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.
74 If unsure, say N here.
76 config IOMMU_PGTABLES_L2
78 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
82 bool "AMD IOMMU support"
89 depends on X86_64 && PCI && ACPI
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.
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
101 config AMD_IOMMU_STATS
102 bool "Export AMD IOMMU statistics to debugfs"
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.
112 tristate "AMD IOMMU Version 2 driver"
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.
120 # Intel IOMMU support
125 bool "Support for Intel IOMMU using DMA Remapping Devices"
126 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
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
137 config INTEL_IOMMU_DEFAULT_ON
139 prompt "Enable Intel DMA Remapping Devices by default"
140 depends on INTEL_IOMMU
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.
146 config INTEL_IOMMU_BROKEN_GFX_WA
147 bool "Workaround broken graphics drivers (going away soon)"
148 depends on INTEL_IOMMU && BROKEN && X86
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.
157 config INTEL_IOMMU_FLOPPY_WA
159 depends on INTEL_IOMMU && X86
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.
167 bool "Support for Interrupt Remapping"
168 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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.
177 bool "OMAP IOMMU Support"
178 depends on ARM && MMU
179 depends on ARCH_OMAP2PLUS || COMPILE_TEST
182 config OMAP_IOMMU_DEBUG
183 bool "Export OMAP IOMMU internals in DebugFS"
184 depends on OMAP_IOMMU && DEBUG_FS
186 Select this to see extensive information about
187 the internal state of OMAP IOMMU in debugfs.
189 Say N unless you know you need this.
191 config ROCKCHIP_IOMMU
192 bool "Rockchip IOMMU Support"
194 depends on ARCH_ROCKCHIP || COMPILE_TEST
196 select ARM_DMA_USE_IOMMU
198 Support for IOMMUs found on Rockchip rk32xx SOCs.
199 These IOMMUs allow virtualization of the address space used by most
200 cores within the multimedia subsystem.
201 Say Y here if you are using a Rockchip SoC that includes an IOMMU
204 config TEGRA_IOMMU_GART
205 bool "Tegra GART IOMMU Support"
206 depends on ARCH_TEGRA_2x_SOC
209 Enables support for remapping discontiguous physical memory
210 shared with the operating system into contiguous I/O virtual
211 space through the GART (Graphics Address Relocation Table)
212 hardware included on Tegra SoCs.
214 config TEGRA_IOMMU_SMMU
215 bool "NVIDIA Tegra SMMU Support"
216 depends on ARCH_TEGRA
221 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
222 SoCs (Tegra30 up to Tegra124).
225 bool "Exynos IOMMU Support"
226 depends on ARCH_EXYNOS && ARM && MMU
228 select ARM_DMA_USE_IOMMU
230 Support for the IOMMU (System MMU) of Samsung Exynos application
231 processor family. This enables H/W multimedia accelerators to see
232 non-linear physical memory chunks as linear memory in their
235 If unsure, say N here.
237 config EXYNOS_IOMMU_DEBUG
238 bool "Debugging log for Exynos IOMMU"
239 depends on EXYNOS_IOMMU
241 Select this to see the detailed log message that shows what
242 happens in the IOMMU driver.
244 Say N unless you need kernel log message for IOMMU debugging.
246 config SHMOBILE_IPMMU
249 config SHMOBILE_IPMMU_TLB
252 config SHMOBILE_IOMMU
253 bool "IOMMU for Renesas IPMMU/IPMMUI"
255 depends on ARM && MMU
256 depends on ARCH_SHMOBILE || COMPILE_TEST
258 select ARM_DMA_USE_IOMMU
259 select SHMOBILE_IPMMU
260 select SHMOBILE_IPMMU_TLB
262 Support for Renesas IPMMU/IPMMUI. This option enables
263 remapping of DMA memory accesses from all of the IP blocks
266 Warning: Drivers (including userspace drivers of UIO
267 devices) of the IP blocks on the ICB *must* use addresses
268 allocated from the IPMMU (iova) for DMA with this option
274 prompt "IPMMU/IPMMUI address space size"
275 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
276 depends on SHMOBILE_IOMMU
278 This option sets IPMMU/IPMMUI address space size by
279 adjusting the 1st level page table size. The page table size
280 is calculated as follows:
282 page table size = number of page table entries * 4 bytes
283 number of page table entries = address space size / 1 MiB
285 For example, when the address space size is 2048 MiB, the
286 1st level page table size is 8192 bytes.
288 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
291 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
294 config SHMOBILE_IOMMU_ADDRSIZE_512MB
297 config SHMOBILE_IOMMU_ADDRSIZE_256MB
300 config SHMOBILE_IOMMU_ADDRSIZE_128MB
303 config SHMOBILE_IOMMU_ADDRSIZE_64MB
306 config SHMOBILE_IOMMU_ADDRSIZE_32MB
311 config SHMOBILE_IOMMU_L1SIZE
313 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
314 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
315 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
316 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
317 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
318 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
319 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
322 bool "Renesas VMSA-compatible IPMMU"
324 depends on ARCH_SHMOBILE || COMPILE_TEST
326 select IOMMU_IO_PGTABLE_LPAE
327 select ARM_DMA_USE_IOMMU
329 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
330 R-Mobile APE6 and R-Car H2/M2 SoCs.
334 config SPAPR_TCE_IOMMU
335 bool "sPAPR TCE IOMMU Support"
336 depends on PPC_POWERNV || PPC_PSERIES
339 Enables bits of IOMMU API required by VFIO. The iommu_ops
340 is not implemented as it is not necessary for VFIO.
343 bool "ARM Ltd. System MMU (SMMU) Support"
344 depends on (ARM64 || ARM) && MMU
346 select IOMMU_IO_PGTABLE_LPAE
347 select ARM_DMA_USE_IOMMU if ARM
349 Support for implementations of the ARM System MMU architecture
352 Say Y here if your SoC includes an IOMMU device implementing
353 the ARM SMMU architecture.
355 endif # IOMMU_SUPPORT