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Linux/drivers/iommu/Kconfig

  1 # IOMMU_API always gets selected by whoever wants it.
  2 config IOMMU_API
  3         bool
  4 
  5 menuconfig IOMMU_SUPPORT
  6         bool "IOMMU Hardware Support"
  7         depends on MMU
  8         default y
  9         ---help---
 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
 13           system.
 14 
 15 if IOMMU_SUPPORT
 16 
 17 menu "Generic IOMMU Pagetable Support"
 18 
 19 # Selected by the actual pagetable implementations
 20 config IOMMU_IO_PGTABLE
 21         bool
 22 
 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)
 27         help
 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.
 32 
 33 config IOMMU_IO_PGTABLE_LPAE_SELFTEST
 34         bool "LPAE selftests"
 35         depends on IOMMU_IO_PGTABLE_LPAE
 36         help
 37           Enable self-tests for LPAE page table allocator. This performs
 38           a series of page-table consistency checks during boot.
 39 
 40           If unsure, say N here.
 41 
 42 config IOMMU_IO_PGTABLE_ARMV7S
 43         bool "ARMv7/v8 Short Descriptor Format"
 44         select IOMMU_IO_PGTABLE
 45         depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST)
 46         help
 47           Enable support for the ARM Short-descriptor pagetable format.
 48           This supports 32-bit virtual and physical addresses mapped using
 49           2-level tables with 4KB pages/1MB sections, and contiguous entries
 50           for 64KB pages/16MB supersections if indicated by the IOMMU driver.
 51 
 52 config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
 53         bool "ARMv7s selftests"
 54         depends on IOMMU_IO_PGTABLE_ARMV7S
 55         help
 56           Enable self-tests for ARMv7s page table allocator. This performs
 57           a series of page-table consistency checks during boot.
 58 
 59           If unsure, say N here.
 60 
 61 endmenu
 62 
 63 config IOMMU_IOVA
 64         tristate
 65 
 66 config OF_IOMMU
 67        def_bool y
 68        depends on OF && IOMMU_API
 69 
 70 # IOMMU-agnostic DMA-mapping layer
 71 config IOMMU_DMA
 72         bool
 73         select IOMMU_API
 74         select IOMMU_IOVA
 75         select NEED_SG_DMA_LENGTH
 76 
 77 config FSL_PAMU
 78         bool "Freescale IOMMU support"
 79         depends on PPC_E500MC || (COMPILE_TEST && PPC)
 80         select IOMMU_API
 81         select GENERIC_ALLOCATOR
 82         help
 83           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 84           PAMU can authorize memory access, remap the memory address, and remap I/O
 85           transaction types.
 86 
 87 # MSM IOMMU support
 88 config MSM_IOMMU
 89         bool "MSM IOMMU Support"
 90         depends on ARM
 91         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 92         depends on BROKEN
 93         select IOMMU_API
 94         help
 95           Support for the IOMMUs found on certain Qualcomm SOCs.
 96           These IOMMUs allow virtualization of the address space used by most
 97           cores within the multimedia subsystem.
 98 
 99           If unsure, say N here.
100 
101 config IOMMU_PGTABLES_L2
102         def_bool y
103         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
104 
105 # AMD IOMMU support
106 config AMD_IOMMU
107         bool "AMD IOMMU support"
108         select SWIOTLB
109         select PCI_MSI
110         select PCI_ATS
111         select PCI_PRI
112         select PCI_PASID
113         select IOMMU_API
114         depends on X86_64 && PCI && ACPI
115         ---help---
116           With this option you can enable support for AMD IOMMU hardware in
117           your system. An IOMMU is a hardware component which provides
118           remapping of DMA memory accesses from devices. With an AMD IOMMU you
119           can isolate the DMA memory of different devices and protect the
120           system from misbehaving device drivers or hardware.
121 
122           You can find out if your system has an AMD IOMMU if you look into
123           your BIOS for an option to enable it or if you have an IVRS ACPI
124           table.
125 
126 config AMD_IOMMU_V2
127         tristate "AMD IOMMU Version 2 driver"
128         depends on AMD_IOMMU
129         select MMU_NOTIFIER
130         ---help---
131           This option enables support for the AMD IOMMUv2 features of the IOMMU
132           hardware. Select this option if you want to use devices that support
133           the PCI PRI and PASID interface.
134 
135 # Intel IOMMU support
136 config DMAR_TABLE
137         bool
138 
139 config INTEL_IOMMU
140         bool "Support for Intel IOMMU using DMA Remapping Devices"
141         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
142         select IOMMU_API
143         select IOMMU_IOVA
144         select DMAR_TABLE
145         help
146           DMA remapping (DMAR) devices support enables independent address
147           translations for Direct Memory Access (DMA) from devices.
148           These DMA remapping devices are reported via ACPI tables
149           and include PCI device scope covered by these DMA
150           remapping devices.
151 
152 config INTEL_IOMMU_SVM
153         bool "Support for Shared Virtual Memory with Intel IOMMU"
154         depends on INTEL_IOMMU && X86
155         select PCI_PASID
156         select MMU_NOTIFIER
157         help
158           Shared Virtual Memory (SVM) provides a facility for devices
159           to access DMA resources through process address space by
160           means of a Process Address Space ID (PASID).
161 
162 config INTEL_IOMMU_DEFAULT_ON
163         def_bool y
164         prompt "Enable Intel DMA Remapping Devices by default"
165         depends on INTEL_IOMMU
166         help
167           Selecting this option will enable a DMAR device at boot time if
168           one is found. If this option is not selected, DMAR support can
169           be enabled by passing intel_iommu=on to the kernel.
170 
171 config INTEL_IOMMU_BROKEN_GFX_WA
172         bool "Workaround broken graphics drivers (going away soon)"
173         depends on INTEL_IOMMU && BROKEN && X86
174         ---help---
175           Current Graphics drivers tend to use physical address
176           for DMA and avoid using DMA APIs. Setting this config
177           option permits the IOMMU driver to set a unity map for
178           all the OS-visible memory. Hence the driver can continue
179           to use physical addresses for DMA, at least until this
180           option is removed in the 2.6.32 kernel.
181 
182 config INTEL_IOMMU_FLOPPY_WA
183         def_bool y
184         depends on INTEL_IOMMU && X86
185         ---help---
186           Floppy disk drivers are known to bypass DMA API calls
187           thereby failing to work when IOMMU is enabled. This
188           workaround will setup a 1:1 mapping for the first
189           16MiB to make floppy (an ISA device) work.
190 
191 config IRQ_REMAP
192         bool "Support for Interrupt Remapping"
193         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
194         select DMAR_TABLE
195         ---help---
196           Supports Interrupt remapping for IO-APIC and MSI devices.
197           To use x2apic mode in the CPU's which support x2APIC enhancements or
198           to support platforms with CPU's having > 8 bit APIC ID, say Y.
199 
200 # OMAP IOMMU support
201 config OMAP_IOMMU
202         bool "OMAP IOMMU Support"
203         depends on ARM && MMU
204         depends on ARCH_OMAP2PLUS || COMPILE_TEST
205         select IOMMU_API
206         ---help---
207           The OMAP3 media platform drivers depend on iommu support,
208           if you need them say Y here.
209 
210 config OMAP_IOMMU_DEBUG
211         bool "Export OMAP IOMMU internals in DebugFS"
212         depends on OMAP_IOMMU && DEBUG_FS
213         ---help---
214           Select this to see extensive information about
215           the internal state of OMAP IOMMU in debugfs.
216 
217           Say N unless you know you need this.
218 
219 config ROCKCHIP_IOMMU
220         bool "Rockchip IOMMU Support"
221         depends on ARM
222         depends on ARCH_ROCKCHIP || COMPILE_TEST
223         select IOMMU_API
224         select ARM_DMA_USE_IOMMU
225         help
226           Support for IOMMUs found on Rockchip rk32xx SOCs.
227           These IOMMUs allow virtualization of the address space used by most
228           cores within the multimedia subsystem.
229           Say Y here if you are using a Rockchip SoC that includes an IOMMU
230           device.
231 
232 config TEGRA_IOMMU_GART
233         bool "Tegra GART IOMMU Support"
234         depends on ARCH_TEGRA_2x_SOC
235         select IOMMU_API
236         help
237           Enables support for remapping discontiguous physical memory
238           shared with the operating system into contiguous I/O virtual
239           space through the GART (Graphics Address Relocation Table)
240           hardware included on Tegra SoCs.
241 
242 config TEGRA_IOMMU_SMMU
243         bool "NVIDIA Tegra SMMU Support"
244         depends on ARCH_TEGRA
245         depends on TEGRA_AHB
246         depends on TEGRA_MC
247         select IOMMU_API
248         help
249           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
250           SoCs (Tegra30 up to Tegra210).
251 
252 config EXYNOS_IOMMU
253         bool "Exynos IOMMU Support"
254         depends on ARCH_EXYNOS && MMU
255         select IOMMU_API
256         select ARM_DMA_USE_IOMMU
257         help
258           Support for the IOMMU (System MMU) of Samsung Exynos application
259           processor family. This enables H/W multimedia accelerators to see
260           non-linear physical memory chunks as linear memory in their
261           address space.
262 
263           If unsure, say N here.
264 
265 config EXYNOS_IOMMU_DEBUG
266         bool "Debugging log for Exynos IOMMU"
267         depends on EXYNOS_IOMMU
268         help
269           Select this to see the detailed log message that shows what
270           happens in the IOMMU driver.
271 
272           Say N unless you need kernel log message for IOMMU debugging.
273 
274 config IPMMU_VMSA
275         bool "Renesas VMSA-compatible IPMMU"
276         depends on ARM_LPAE
277         depends on ARCH_RENESAS || COMPILE_TEST
278         select IOMMU_API
279         select IOMMU_IO_PGTABLE_LPAE
280         select ARM_DMA_USE_IOMMU
281         help
282           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
283           R-Mobile APE6 and R-Car H2/M2 SoCs.
284 
285           If unsure, say N.
286 
287 config SPAPR_TCE_IOMMU
288         bool "sPAPR TCE IOMMU Support"
289         depends on PPC_POWERNV || PPC_PSERIES
290         select IOMMU_API
291         help
292           Enables bits of IOMMU API required by VFIO. The iommu_ops
293           is not implemented as it is not necessary for VFIO.
294 
295 # ARM IOMMU support
296 config ARM_SMMU
297         bool "ARM Ltd. System MMU (SMMU) Support"
298         depends on (ARM64 || ARM) && MMU
299         select IOMMU_API
300         select IOMMU_IO_PGTABLE_LPAE
301         select ARM_DMA_USE_IOMMU if ARM
302         help
303           Support for implementations of the ARM System MMU architecture
304           versions 1 and 2.
305 
306           Say Y here if your SoC includes an IOMMU device implementing
307           the ARM SMMU architecture.
308 
309 config ARM_SMMU_V3
310         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
311         depends on ARM64 && PCI
312         select IOMMU_API
313         select IOMMU_IO_PGTABLE_LPAE
314         select GENERIC_MSI_IRQ_DOMAIN
315         help
316           Support for implementations of the ARM System MMU architecture
317           version 3 providing translation support to a PCIe root complex.
318 
319           Say Y here if your system includes an IOMMU device implementing
320           the ARM SMMUv3 architecture.
321 
322 config S390_IOMMU
323         def_bool y if S390 && PCI
324         depends on S390 && PCI
325         select IOMMU_API
326         help
327           Support for the IOMMU API for s390 PCI devices.
328 
329 config MTK_IOMMU
330         bool "MTK IOMMU Support"
331         depends on ARM || ARM64
332         depends on ARCH_MEDIATEK || COMPILE_TEST
333         select ARM_DMA_USE_IOMMU
334         select IOMMU_API
335         select IOMMU_DMA
336         select IOMMU_IO_PGTABLE_ARMV7S
337         select MEMORY
338         select MTK_SMI
339         help
340           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
341           Memory Management Unit. This option enables remapping of DMA memory
342           accesses for the multimedia subsystem.
343 
344           If unsure, say N here.
345 
346 endif # IOMMU_SUPPORT

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