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 # SWIOTLB guarantees a dma_to_phys() implementation
27 depends on ARM || ARM64 || (COMPILE_TEST && SWIOTLB)
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.
34 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
36 depends on IOMMU_IO_PGTABLE_LPAE
38 Enable self-tests for LPAE page table allocator. This performs
39 a series of page-table consistency checks during boot.
41 If unsure, say N here.
50 depends on OF && IOMMU_API
53 bool "Freescale IOMMU support"
55 depends on PPC_E500MC || COMPILE_TEST
57 select GENERIC_ALLOCATOR
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
65 bool "MSM IOMMU Support"
67 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
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.
75 If unsure, say N here.
77 config IOMMU_PGTABLES_L2
79 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
83 bool "AMD IOMMU support"
90 depends on X86_64 && PCI && ACPI
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.
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
102 config AMD_IOMMU_STATS
103 bool "Export AMD IOMMU statistics to debugfs"
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.
113 tristate "AMD IOMMU Version 2 driver"
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.
121 # Intel IOMMU support
126 bool "Support for Intel IOMMU using DMA Remapping Devices"
127 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
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
138 config INTEL_IOMMU_DEFAULT_ON
140 prompt "Enable Intel DMA Remapping Devices by default"
141 depends on INTEL_IOMMU
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.
147 config INTEL_IOMMU_BROKEN_GFX_WA
148 bool "Workaround broken graphics drivers (going away soon)"
149 depends on INTEL_IOMMU && BROKEN && X86
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.
158 config INTEL_IOMMU_FLOPPY_WA
160 depends on INTEL_IOMMU && X86
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.
168 bool "Support for Interrupt Remapping"
169 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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.
178 bool "OMAP IOMMU Support"
179 depends on ARM && MMU
180 depends on ARCH_OMAP2PLUS || COMPILE_TEST
183 The OMAP3 media platform drivers depend on iommu support,
184 if you need them say Y here.
186 config OMAP_IOMMU_DEBUG
187 bool "Export OMAP IOMMU internals in DebugFS"
188 depends on OMAP_IOMMU && DEBUG_FS
190 Select this to see extensive information about
191 the internal state of OMAP IOMMU in debugfs.
193 Say N unless you know you need this.
195 config ROCKCHIP_IOMMU
196 bool "Rockchip IOMMU Support"
198 depends on ARCH_ROCKCHIP || COMPILE_TEST
200 select ARM_DMA_USE_IOMMU
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
208 config TEGRA_IOMMU_GART
209 bool "Tegra GART IOMMU Support"
210 depends on ARCH_TEGRA_2x_SOC
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.
218 config TEGRA_IOMMU_SMMU
219 bool "NVIDIA Tegra SMMU Support"
220 depends on ARCH_TEGRA
225 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
226 SoCs (Tegra30 up to Tegra210).
229 bool "Exynos IOMMU Support"
230 depends on ARCH_EXYNOS && ARM && MMU
232 select ARM_DMA_USE_IOMMU
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
239 If unsure, say N here.
241 config EXYNOS_IOMMU_DEBUG
242 bool "Debugging log for Exynos IOMMU"
243 depends on EXYNOS_IOMMU
245 Select this to see the detailed log message that shows what
246 happens in the IOMMU driver.
248 Say N unless you need kernel log message for IOMMU debugging.
250 config SHMOBILE_IPMMU
253 config SHMOBILE_IPMMU_TLB
256 config SHMOBILE_IOMMU
257 bool "IOMMU for Renesas IPMMU/IPMMUI"
259 depends on ARM && MMU
260 depends on ARCH_SHMOBILE || COMPILE_TEST
262 select ARM_DMA_USE_IOMMU
263 select SHMOBILE_IPMMU
264 select SHMOBILE_IPMMU_TLB
266 Support for Renesas IPMMU/IPMMUI. This option enables
267 remapping of DMA memory accesses from all of the IP blocks
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
278 prompt "IPMMU/IPMMUI address space size"
279 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
280 depends on SHMOBILE_IOMMU
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:
286 page table size = number of page table entries * 4 bytes
287 number of page table entries = address space size / 1 MiB
289 For example, when the address space size is 2048 MiB, the
290 1st level page table size is 8192 bytes.
292 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
295 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
298 config SHMOBILE_IOMMU_ADDRSIZE_512MB
301 config SHMOBILE_IOMMU_ADDRSIZE_256MB
304 config SHMOBILE_IOMMU_ADDRSIZE_128MB
307 config SHMOBILE_IOMMU_ADDRSIZE_64MB
310 config SHMOBILE_IOMMU_ADDRSIZE_32MB
315 config SHMOBILE_IOMMU_L1SIZE
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
326 bool "Renesas VMSA-compatible IPMMU"
328 depends on ARCH_SHMOBILE || COMPILE_TEST
330 select IOMMU_IO_PGTABLE_LPAE
331 select ARM_DMA_USE_IOMMU
333 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
334 R-Mobile APE6 and R-Car H2/M2 SoCs.
338 config SPAPR_TCE_IOMMU
339 bool "sPAPR TCE IOMMU Support"
340 depends on PPC_POWERNV || PPC_PSERIES
343 Enables bits of IOMMU API required by VFIO. The iommu_ops
344 is not implemented as it is not necessary for VFIO.
348 bool "ARM Ltd. System MMU (SMMU) Support"
349 depends on (ARM64 || ARM) && MMU
351 select IOMMU_IO_PGTABLE_LPAE
352 select ARM_DMA_USE_IOMMU if ARM
354 Support for implementations of the ARM System MMU architecture
357 Say Y here if your SoC includes an IOMMU device implementing
358 the ARM SMMU architecture.
361 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
362 depends on ARM64 && PCI
364 select IOMMU_IO_PGTABLE_LPAE
366 Support for implementations of the ARM System MMU architecture
367 version 3 providing translation support to a PCIe root complex.
369 Say Y here if your system includes an IOMMU device implementing
370 the ARM SMMUv3 architecture.
372 endif # IOMMU_SUPPORT