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
225 bool "RK IOMMU Support"
226 depends on ARCH_ROCKCHIP || COMPILE_TEST
229 Support for IOMMUs found on Rockchip rk32xx,rk313x,rk33xx SOCs.
230 These IOMMUs allow virtualization of the address space used by most
231 cores within the multimedia subsystem.
232 Say Y here if you are using a Rockchip SoC that includes an IOMMU
236 bool "IO Virtual Memory Manager for RK IOMMUs"
237 select GENERIC_ALLOCATOR
240 Supporting the users of Rockchip IOMMU for allocating and mapping
241 an IO virtual memory region with a physical memory region
242 and managing the allocated virtual memory regions.
244 config RK_IOMMU_DEBUG
245 bool "Debugging log for RK IOMMU"
248 Select this to see the detailed log message that shows what
249 happens in the IOMMU driver
251 Say N unless you need kernel log message for IOMMU debugging
253 config TEGRA_IOMMU_GART
254 bool "Tegra GART IOMMU Support"
255 depends on ARCH_TEGRA_2x_SOC
258 Enables support for remapping discontiguous physical memory
259 shared with the operating system into contiguous I/O virtual
260 space through the GART (Graphics Address Relocation Table)
261 hardware included on Tegra SoCs.
263 config TEGRA_IOMMU_SMMU
264 bool "NVIDIA Tegra SMMU Support"
265 depends on ARCH_TEGRA
270 This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
271 SoCs (Tegra30 up to Tegra210).
274 bool "Exynos IOMMU Support"
275 depends on ARCH_EXYNOS && ARM && MMU
277 select ARM_DMA_USE_IOMMU
279 Support for the IOMMU (System MMU) of Samsung Exynos application
280 processor family. This enables H/W multimedia accelerators to see
281 non-linear physical memory chunks as linear memory in their
284 If unsure, say N here.
286 config EXYNOS_IOMMU_DEBUG
287 bool "Debugging log for Exynos IOMMU"
288 depends on EXYNOS_IOMMU
290 Select this to see the detailed log message that shows what
291 happens in the IOMMU driver.
293 Say N unless you need kernel log message for IOMMU debugging.
295 config SHMOBILE_IPMMU
298 config SHMOBILE_IPMMU_TLB
301 config SHMOBILE_IOMMU
302 bool "IOMMU for Renesas IPMMU/IPMMUI"
304 depends on ARM && MMU
305 depends on ARCH_SHMOBILE || COMPILE_TEST
307 select ARM_DMA_USE_IOMMU
308 select SHMOBILE_IPMMU
309 select SHMOBILE_IPMMU_TLB
311 Support for Renesas IPMMU/IPMMUI. This option enables
312 remapping of DMA memory accesses from all of the IP blocks
315 Warning: Drivers (including userspace drivers of UIO
316 devices) of the IP blocks on the ICB *must* use addresses
317 allocated from the IPMMU (iova) for DMA with this option
323 prompt "IPMMU/IPMMUI address space size"
324 default SHMOBILE_IOMMU_ADDRSIZE_2048MB
325 depends on SHMOBILE_IOMMU
327 This option sets IPMMU/IPMMUI address space size by
328 adjusting the 1st level page table size. The page table size
329 is calculated as follows:
331 page table size = number of page table entries * 4 bytes
332 number of page table entries = address space size / 1 MiB
334 For example, when the address space size is 2048 MiB, the
335 1st level page table size is 8192 bytes.
337 config SHMOBILE_IOMMU_ADDRSIZE_2048MB
340 config SHMOBILE_IOMMU_ADDRSIZE_1024MB
343 config SHMOBILE_IOMMU_ADDRSIZE_512MB
346 config SHMOBILE_IOMMU_ADDRSIZE_256MB
349 config SHMOBILE_IOMMU_ADDRSIZE_128MB
352 config SHMOBILE_IOMMU_ADDRSIZE_64MB
355 config SHMOBILE_IOMMU_ADDRSIZE_32MB
360 config SHMOBILE_IOMMU_L1SIZE
362 default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
363 default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
364 default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
365 default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
366 default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
367 default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
368 default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
371 bool "Renesas VMSA-compatible IPMMU"
373 depends on ARCH_SHMOBILE || COMPILE_TEST
375 select IOMMU_IO_PGTABLE_LPAE
376 select ARM_DMA_USE_IOMMU
378 Support for the Renesas VMSA-compatible IPMMU Renesas found in the
379 R-Mobile APE6 and R-Car H2/M2 SoCs.
383 config SPAPR_TCE_IOMMU
384 bool "sPAPR TCE IOMMU Support"
385 depends on PPC_POWERNV || PPC_PSERIES
388 Enables bits of IOMMU API required by VFIO. The iommu_ops
389 is not implemented as it is not necessary for VFIO.
393 bool "ARM Ltd. System MMU (SMMU) Support"
394 depends on (ARM64 || ARM) && MMU
396 select IOMMU_IO_PGTABLE_LPAE
397 select ARM_DMA_USE_IOMMU if ARM
399 Support for implementations of the ARM System MMU architecture
402 Say Y here if your SoC includes an IOMMU device implementing
403 the ARM SMMU architecture.
406 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
407 depends on ARM64 && PCI
409 select IOMMU_IO_PGTABLE_LPAE
410 select GENERIC_MSI_IRQ_DOMAIN
412 Support for implementations of the ARM System MMU architecture
413 version 3 providing translation support to a PCIe root complex.
415 Say Y here if your system includes an IOMMU device implementing
416 the ARM SMMUv3 architecture.
419 def_bool y if S390 && PCI
420 depends on S390 && PCI
423 Support for the IOMMU API for s390 PCI devices.
425 endif # IOMMU_SUPPORT