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 HAS_DMA && (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
51 # IOMMU-agnostic DMA-mapping layer
54 depends on NEED_SG_DMA_LENGTH
59 bool "Freescale IOMMU support"
61 depends on PPC_E500MC || COMPILE_TEST
63 select GENERIC_ALLOCATOR
65 Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
66 PAMU can authorize memory access, remap the memory address, and remap I/O
71 bool "MSM IOMMU Support"
73 depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
77 Support for the IOMMUs found on certain Qualcomm SOCs.
78 These IOMMUs allow virtualization of the address space used by most
79 cores within the multimedia subsystem.
81 If unsure, say N here.
83 config IOMMU_PGTABLES_L2
85 depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
89 bool "AMD IOMMU support"
96 depends on X86_64 && PCI && ACPI
98 With this option you can enable support for AMD IOMMU hardware in
99 your system. An IOMMU is a hardware component which provides
100 remapping of DMA memory accesses from devices. With an AMD IOMMU you
101 can isolate the DMA memory of different devices and protect the
102 system from misbehaving device drivers or hardware.
104 You can find out if your system has an AMD IOMMU if you look into
105 your BIOS for an option to enable it or if you have an IVRS ACPI
108 config AMD_IOMMU_STATS
109 bool "Export AMD IOMMU statistics to debugfs"
113 This option enables code in the AMD IOMMU driver to collect various
114 statistics about whats happening in the driver and exports that
115 information to userspace via debugfs.
119 tristate "AMD IOMMU Version 2 driver"
123 This option enables support for the AMD IOMMUv2 features of the IOMMU
124 hardware. Select this option if you want to use devices that support
125 the PCI PRI and PASID interface.
127 # Intel IOMMU support
132 bool "Support for Intel IOMMU using DMA Remapping Devices"
133 depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
138 DMA remapping (DMAR) devices support enables independent address
139 translations for Direct Memory Access (DMA) from devices.
140 These DMA remapping devices are reported via ACPI tables
141 and include PCI device scope covered by these DMA
144 config INTEL_IOMMU_SVM
145 bool "Support for Shared Virtual Memory with Intel IOMMU"
146 depends on INTEL_IOMMU && X86
150 Shared Virtual Memory (SVM) provides a facility for devices
151 to access DMA resources through process address space by
152 means of a Process Address Space ID (PASID).
154 config INTEL_IOMMU_DEFAULT_ON
156 prompt "Enable Intel DMA Remapping Devices by default"
157 depends on INTEL_IOMMU
159 Selecting this option will enable a DMAR device at boot time if
160 one is found. If this option is not selected, DMAR support can
161 be enabled by passing intel_iommu=on to the kernel.
163 config INTEL_IOMMU_BROKEN_GFX_WA
164 bool "Workaround broken graphics drivers (going away soon)"
165 depends on INTEL_IOMMU && BROKEN && X86
167 Current Graphics drivers tend to use physical address
168 for DMA and avoid using DMA APIs. Setting this config
169 option permits the IOMMU driver to set a unity map for
170 all the OS-visible memory. Hence the driver can continue
171 to use physical addresses for DMA, at least until this
172 option is removed in the 2.6.32 kernel.
174 config INTEL_IOMMU_FLOPPY_WA
176 depends on INTEL_IOMMU && X86
178 Floppy disk drivers are known to bypass DMA API calls
179 thereby failing to work when IOMMU is enabled. This
180 workaround will setup a 1:1 mapping for the first
181 16MiB to make floppy (an ISA device) work.
184 bool "Support for Interrupt Remapping"
185 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
188 Supports Interrupt remapping for IO-APIC and MSI devices.
189 To use x2apic mode in the CPU's which support x2APIC enhancements or
190 to support platforms with CPU's having > 8 bit APIC ID, say Y.
194 bool "OMAP IOMMU Support"
195 depends on ARM && MMU
196 depends on ARCH_OMAP2PLUS || COMPILE_TEST
199 The OMAP3 media platform drivers depend on iommu support,
200 if you need them say Y here.
202 config OMAP_IOMMU_DEBUG
203 bool "Export OMAP IOMMU internals in DebugFS"
204 depends on OMAP_IOMMU && DEBUG_FS
206 Select this to see extensive information about
207 the internal state of OMAP IOMMU in debugfs.
209 Say N unless you know you need this.
211 config ROCKCHIP_IOMMU
212 bool "Rockchip IOMMU Support"
214 depends on ARCH_ROCKCHIP || COMPILE_TEST
216 select ARM_DMA_USE_IOMMU
218 Support for IOMMUs found on Rockchip rk32xx SOCs.
219 These IOMMUs allow virtualization of the address space used by most
220 cores within the multimedia subsystem.
221 Say Y here if you are using a Rockchip SoC that includes an IOMMU
224 config TEGRA_IOMMU_GART
225 bool "Tegra GART IOMMU Support"
226 depends on ARCH_TEGRA_2x_SOC
229 Enables support for remapping discontiguous physical memory
230 shared with the operating system into contiguous I/O virtual
231 space through the GART (Graphics Address Relocation Table)
232 hardware included on Tegra SoCs.
234 config TEGRA_IOMMU_SMMU
235 bool "NVIDIA Tegra SMMU Support"
236 depends on ARCH_TEGRA
241 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
242 SoCs (Tegra30 up to Tegra210).
245 bool "Exynos IOMMU Support"
246 depends on ARCH_EXYNOS && ARM && MMU
248 select ARM_DMA_USE_IOMMU
250 Support for the IOMMU (System MMU) of Samsung Exynos application
251 processor family. This enables H/W multimedia accelerators to see
252 non-linear physical memory chunks as linear memory in their
255 If unsure, say N here.
257 config EXYNOS_IOMMU_DEBUG
258 bool "Debugging log for Exynos IOMMU"
259 depends on EXYNOS_IOMMU
261 Select this to see the detailed log message that shows what
262 happens in the IOMMU driver.
264 Say N unless you need kernel log message for IOMMU debugging.
267 bool "Renesas VMSA-compatible IPMMU"
269 depends on ARCH_SHMOBILE || COMPILE_TEST
271 select IOMMU_IO_PGTABLE_LPAE
272 select ARM_DMA_USE_IOMMU
274 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
275 R-Mobile APE6 and R-Car H2/M2 SoCs.
279 config SPAPR_TCE_IOMMU
280 bool "sPAPR TCE IOMMU Support"
281 depends on PPC_POWERNV || PPC_PSERIES
284 Enables bits of IOMMU API required by VFIO. The iommu_ops
285 is not implemented as it is not necessary for VFIO.
289 bool "ARM Ltd. System MMU (SMMU) Support"
290 depends on (ARM64 || ARM) && MMU
292 select IOMMU_IO_PGTABLE_LPAE
293 select ARM_DMA_USE_IOMMU if ARM
295 Support for implementations of the ARM System MMU architecture
298 Say Y here if your SoC includes an IOMMU device implementing
299 the ARM SMMU architecture.
302 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
303 depends on ARM64 && PCI
305 select IOMMU_IO_PGTABLE_LPAE
306 select GENERIC_MSI_IRQ_DOMAIN
308 Support for implementations of the ARM System MMU architecture
309 version 3 providing translation support to a PCIe root complex.
311 Say Y here if your system includes an IOMMU device implementing
312 the ARM SMMUv3 architecture.
315 def_bool y if S390 && PCI
316 depends on S390 && PCI
319 Support for the IOMMU API for s390 PCI devices.
321 endif # IOMMU_SUPPORT