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
27 Enable support for the ARM long descriptor pagetable format.
28 This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
29 sizes at both stage-1 and stage-2, as well as address spaces
30 up to 48-bits in size.
32 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
34 depends on IOMMU_IO_PGTABLE_LPAE
36 Enable self-tests for LPAE page table allocator. This performs
37 a series of page-table consistency checks during boot.
39 If unsure, say N here.
48 depends on OF && IOMMU_API
51 bool "Freescale IOMMU support"
53 depends on PPC_E500MC || COMPILE_TEST
55 select GENERIC_ALLOCATOR
57 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
58 PAMU can authorize memory access, remap the memory address, and remap I/O
63 bool "MSM IOMMU Support"
65 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
68 Support for the IOMMUs found on certain Qualcomm SOCs.
69 These IOMMUs allow virtualization of the address space used by most
70 cores within the multimedia subsystem.
72 If unsure, say N here.
74 config IOMMU_PGTABLES_L2
76 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
80 bool "AMD IOMMU support"
87 depends on X86_64 && PCI && ACPI
89 With this option you can enable support for AMD IOMMU hardware in
90 your system. An IOMMU is a hardware component which provides
91 remapping of DMA memory accesses from devices. With an AMD IOMMU you
92 can isolate the DMA memory of different devices and protect the
93 system from misbehaving device drivers or hardware.
95 You can find out if your system has an AMD IOMMU if you look into
96 your BIOS for an option to enable it or if you have an IVRS ACPI
99 config AMD_IOMMU_STATS
100 bool "Export AMD IOMMU statistics to debugfs"
104 This option enables code in the AMD IOMMU driver to collect various
105 statistics about whats happening in the driver and exports that
106 information to userspace via debugfs.
110 tristate "AMD IOMMU Version 2 driver"
114 This option enables support for the AMD IOMMUv2 features of the IOMMU
115 hardware. Select this option if you want to use devices that support
116 the PCI PRI and PASID interface.
118 # Intel IOMMU support
123 bool "Support for Intel IOMMU using DMA Remapping Devices"
124 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
129 DMA remapping (DMAR) devices support enables independent address
130 translations for Direct Memory Access (DMA) from devices.
131 These DMA remapping devices are reported via ACPI tables
132 and include PCI device scope covered by these DMA
135 config INTEL_IOMMU_DEFAULT_ON
137 prompt "Enable Intel DMA Remapping Devices by default"
138 depends on INTEL_IOMMU
140 Selecting this option will enable a DMAR device at boot time if
141 one is found. If this option is not selected, DMAR support can
142 be enabled by passing intel_iommu=on to the kernel.
144 config INTEL_IOMMU_BROKEN_GFX_WA
145 bool "Workaround broken graphics drivers (going away soon)"
146 depends on INTEL_IOMMU && BROKEN && X86
148 Current Graphics drivers tend to use physical address
149 for DMA and avoid using DMA APIs. Setting this config
150 option permits the IOMMU driver to set a unity map for
151 all the OS-visible memory. Hence the driver can continue
152 to use physical addresses for DMA, at least until this
153 option is removed in the 2.6.32 kernel.
155 config INTEL_IOMMU_FLOPPY_WA
157 depends on INTEL_IOMMU && X86
159 Floppy disk drivers are known to bypass DMA API calls
160 thereby failing to work when IOMMU is enabled. This
161 workaround will setup a 1:1 mapping for the first
162 16MiB to make floppy (an ISA device) work.
165 bool "Support for Interrupt Remapping"
166 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
169 Supports Interrupt remapping for IO-APIC and MSI devices.
170 To use x2apic mode in the CPU's which support x2APIC enhancements or
171 to support platforms with CPU's having > 8 bit APIC ID, say Y.
175 bool "OMAP IOMMU Support"
176 depends on ARM && MMU
177 depends on ARCH_OMAP2PLUS || COMPILE_TEST
180 config OMAP_IOMMU_DEBUG
181 bool "Export OMAP IOMMU internals in DebugFS"
182 depends on OMAP_IOMMU && DEBUG_FS
184 Select this to see extensive information about
185 the internal state of OMAP IOMMU in debugfs.
187 Say N unless you know you need this.
189 config ROCKCHIP_IOMMU
190 bool "Rockchip IOMMU Support"
192 depends on ARCH_ROCKCHIP || COMPILE_TEST
194 select ARM_DMA_USE_IOMMU
196 Support for IOMMUs found on Rockchip rk32xx SOCs.
197 These IOMMUs allow virtualization of the address space used by most
198 cores within the multimedia subsystem.
199 Say Y here if you are using a Rockchip SoC that includes an IOMMU
202 config TEGRA_IOMMU_GART
203 bool "Tegra GART IOMMU Support"
204 depends on ARCH_TEGRA_2x_SOC
207 Enables support for remapping discontiguous physical memory
208 shared with the operating system into contiguous I/O virtual
209 space through the GART (Graphics Address Relocation Table)
210 hardware included on Tegra SoCs.
212 config TEGRA_IOMMU_SMMU
213 bool "NVIDIA Tegra SMMU Support"
214 depends on ARCH_TEGRA
219 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
220 SoCs (Tegra30 up to Tegra124).
223 bool "Exynos IOMMU Support"
224 depends on ARCH_EXYNOS && ARM && MMU
226 select ARM_DMA_USE_IOMMU
228 Support for the IOMMU (System MMU) of Samsung Exynos application
229 processor family. This enables H/W multimedia accelerators to see
230 non-linear physical memory chunks as linear memory in their
233 If unsure, say N here.
235 config EXYNOS_IOMMU_DEBUG
236 bool "Debugging log for Exynos IOMMU"
237 depends on EXYNOS_IOMMU
239 Select this to see the detailed log message that shows what
240 happens in the IOMMU driver.
242 Say N unless you need kernel log message for IOMMU debugging.
244 config SHMOBILE_IPMMU
247 config SHMOBILE_IPMMU_TLB
250 config SHMOBILE_IOMMU
251 bool "IOMMU for Renesas IPMMU/IPMMUI"
253 depends on ARM && MMU
254 depends on ARCH_SHMOBILE || COMPILE_TEST
256 select ARM_DMA_USE_IOMMU
257 select SHMOBILE_IPMMU
258 select SHMOBILE_IPMMU_TLB
260 Support for Renesas IPMMU/IPMMUI. This option enables
261 remapping of DMA memory accesses from all of the IP blocks
264 Warning: Drivers (including userspace drivers of UIO
265 devices) of the IP blocks on the ICB *must* use addresses
266 allocated from the IPMMU (iova) for DMA with this option
272 prompt "IPMMU/IPMMUI address space size"
273 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
274 depends on SHMOBILE_IOMMU
276 This option sets IPMMU/IPMMUI address space size by
277 adjusting the 1st level page table size. The page table size
278 is calculated as follows:
280 page table size = number of page table entries * 4 bytes
281 number of page table entries = address space size / 1 MiB
283 For example, when the address space size is 2048 MiB, the
284 1st level page table size is 8192 bytes.
286 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
289 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
292 config SHMOBILE_IOMMU_ADDRSIZE_512MB
295 config SHMOBILE_IOMMU_ADDRSIZE_256MB
298 config SHMOBILE_IOMMU_ADDRSIZE_128MB
301 config SHMOBILE_IOMMU_ADDRSIZE_64MB
304 config SHMOBILE_IOMMU_ADDRSIZE_32MB
309 config SHMOBILE_IOMMU_L1SIZE
311 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
312 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
313 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
314 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
315 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
316 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
317 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
320 bool "Renesas VMSA-compatible IPMMU"
322 depends on ARCH_SHMOBILE || COMPILE_TEST
324 select IOMMU_IO_PGTABLE_LPAE
325 select ARM_DMA_USE_IOMMU
327 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
328 R-Mobile APE6 and R-Car H2/M2 SoCs.
332 config SPAPR_TCE_IOMMU
333 bool "sPAPR TCE IOMMU Support"
334 depends on PPC_POWERNV || PPC_PSERIES
337 Enables bits of IOMMU API required by VFIO. The iommu_ops
338 is not implemented as it is not necessary for VFIO.
341 bool "ARM Ltd. System MMU (SMMU) Support"
342 depends on (ARM64 || ARM) && MMU
344 select IOMMU_IO_PGTABLE_LPAE
345 select ARM_DMA_USE_IOMMU if ARM
347 Support for implementations of the ARM System MMU architecture
350 Say Y here if your SoC includes an IOMMU device implementing
351 the ARM SMMU architecture.
353 endif # IOMMU_SUPPORT