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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         select IOMMU_API
 93         select IOMMU_IO_PGTABLE_ARMV7S
 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         select IOMMU_IOVA
115         depends on X86_64 && PCI && ACPI
116         ---help---
117           With this option you can enable support for AMD IOMMU hardware in
118           your system. An IOMMU is a hardware component which provides
119           remapping of DMA memory accesses from devices. With an AMD IOMMU you
120           can isolate the DMA memory of different devices and protect the
121           system from misbehaving device drivers or hardware.
122 
123           You can find out if your system has an AMD IOMMU if you look into
124           your BIOS for an option to enable it or if you have an IVRS ACPI
125           table.
126 
127 config AMD_IOMMU_V2
128         tristate "AMD IOMMU Version 2 driver"
129         depends on AMD_IOMMU
130         select MMU_NOTIFIER
131         ---help---
132           This option enables support for the AMD IOMMUv2 features of the IOMMU
133           hardware. Select this option if you want to use devices that support
134           the PCI PRI and PASID interface.
135 
136 # Intel IOMMU support
137 config DMAR_TABLE
138         bool
139 
140 config INTEL_IOMMU
141         bool "Support for Intel IOMMU using DMA Remapping Devices"
142         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
143         select IOMMU_API
144         select IOMMU_IOVA
145         select DMAR_TABLE
146         help
147           DMA remapping (DMAR) devices support enables independent address
148           translations for Direct Memory Access (DMA) from devices.
149           These DMA remapping devices are reported via ACPI tables
150           and include PCI device scope covered by these DMA
151           remapping devices.
152 
153 config INTEL_IOMMU_SVM
154         bool "Support for Shared Virtual Memory with Intel IOMMU"
155         depends on INTEL_IOMMU && X86
156         select PCI_PASID
157         select MMU_NOTIFIER
158         help
159           Shared Virtual Memory (SVM) provides a facility for devices
160           to access DMA resources through process address space by
161           means of a Process Address Space ID (PASID).
162 
163 config INTEL_IOMMU_DEFAULT_ON
164         def_bool y
165         prompt "Enable Intel DMA Remapping Devices by default"
166         depends on INTEL_IOMMU
167         help
168           Selecting this option will enable a DMAR device at boot time if
169           one is found. If this option is not selected, DMAR support can
170           be enabled by passing intel_iommu=on to the kernel.
171 
172 config INTEL_IOMMU_BROKEN_GFX_WA
173         bool "Workaround broken graphics drivers (going away soon)"
174         depends on INTEL_IOMMU && BROKEN && X86
175         ---help---
176           Current Graphics drivers tend to use physical address
177           for DMA and avoid using DMA APIs. Setting this config
178           option permits the IOMMU driver to set a unity map for
179           all the OS-visible memory. Hence the driver can continue
180           to use physical addresses for DMA, at least until this
181           option is removed in the 2.6.32 kernel.
182 
183 config INTEL_IOMMU_FLOPPY_WA
184         def_bool y
185         depends on INTEL_IOMMU && X86
186         ---help---
187           Floppy disk drivers are known to bypass DMA API calls
188           thereby failing to work when IOMMU is enabled. This
189           workaround will setup a 1:1 mapping for the first
190           16MiB to make floppy (an ISA device) work.
191 
192 config IRQ_REMAP
193         bool "Support for Interrupt Remapping"
194         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
195         select DMAR_TABLE
196         ---help---
197           Supports Interrupt remapping for IO-APIC and MSI devices.
198           To use x2apic mode in the CPU's which support x2APIC enhancements or
199           to support platforms with CPU's having > 8 bit APIC ID, say Y.
200 
201 # OMAP IOMMU support
202 config OMAP_IOMMU
203         bool "OMAP IOMMU Support"
204         depends on ARM && MMU
205         depends on ARCH_OMAP2PLUS || COMPILE_TEST
206         select IOMMU_API
207         ---help---
208           The OMAP3 media platform drivers depend on iommu support,
209           if you need them say Y here.
210 
211 config OMAP_IOMMU_DEBUG
212         bool "Export OMAP IOMMU internals in DebugFS"
213         depends on OMAP_IOMMU && DEBUG_FS
214         ---help---
215           Select this to see extensive information about
216           the internal state of OMAP IOMMU in debugfs.
217 
218           Say N unless you know you need this.
219 
220 config ROCKCHIP_IOMMU
221         bool "Rockchip IOMMU Support"
222         depends on ARM
223         depends on ARCH_ROCKCHIP || COMPILE_TEST
224         select IOMMU_API
225         select ARM_DMA_USE_IOMMU
226         help
227           Support for IOMMUs found on Rockchip rk32xx SOCs.
228           These IOMMUs allow virtualization of the address space used by most
229           cores within the multimedia subsystem.
230           Say Y here if you are using a Rockchip SoC that includes an IOMMU
231           device.
232 
233 config TEGRA_IOMMU_GART
234         bool "Tegra GART IOMMU Support"
235         depends on ARCH_TEGRA_2x_SOC
236         select IOMMU_API
237         help
238           Enables support for remapping discontiguous physical memory
239           shared with the operating system into contiguous I/O virtual
240           space through the GART (Graphics Address Relocation Table)
241           hardware included on Tegra SoCs.
242 
243 config TEGRA_IOMMU_SMMU
244         bool "NVIDIA Tegra SMMU Support"
245         depends on ARCH_TEGRA
246         depends on TEGRA_AHB
247         depends on TEGRA_MC
248         select IOMMU_API
249         help
250           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
251           SoCs (Tegra30 up to Tegra210).
252 
253 config EXYNOS_IOMMU
254         bool "Exynos IOMMU Support"
255         depends on ARCH_EXYNOS && MMU
256         select IOMMU_API
257         select ARM_DMA_USE_IOMMU
258         help
259           Support for the IOMMU (System MMU) of Samsung Exynos application
260           processor family. This enables H/W multimedia accelerators to see
261           non-linear physical memory chunks as linear memory in their
262           address space.
263 
264           If unsure, say N here.
265 
266 config EXYNOS_IOMMU_DEBUG
267         bool "Debugging log for Exynos IOMMU"
268         depends on EXYNOS_IOMMU
269         help
270           Select this to see the detailed log message that shows what
271           happens in the IOMMU driver.
272 
273           Say N unless you need kernel log message for IOMMU debugging.
274 
275 config IPMMU_VMSA
276         bool "Renesas VMSA-compatible IPMMU"
277         depends on ARM_LPAE
278         depends on ARCH_RENESAS || COMPILE_TEST
279         select IOMMU_API
280         select IOMMU_IO_PGTABLE_LPAE
281         select ARM_DMA_USE_IOMMU
282         help
283           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
284           R-Mobile APE6 and R-Car H2/M2 SoCs.
285 
286           If unsure, say N.
287 
288 config SPAPR_TCE_IOMMU
289         bool "sPAPR TCE IOMMU Support"
290         depends on PPC_POWERNV || PPC_PSERIES
291         select IOMMU_API
292         help
293           Enables bits of IOMMU API required by VFIO. The iommu_ops
294           is not implemented as it is not necessary for VFIO.
295 
296 # ARM IOMMU support
297 config ARM_SMMU
298         bool "ARM Ltd. System MMU (SMMU) Support"
299         depends on (ARM64 || ARM) && MMU
300         select IOMMU_API
301         select IOMMU_IO_PGTABLE_LPAE
302         select ARM_DMA_USE_IOMMU if ARM
303         help
304           Support for implementations of the ARM System MMU architecture
305           versions 1 and 2.
306 
307           Say Y here if your SoC includes an IOMMU device implementing
308           the ARM SMMU architecture.
309 
310 config ARM_SMMU_V3
311         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
312         depends on ARM64 && PCI
313         select IOMMU_API
314         select IOMMU_IO_PGTABLE_LPAE
315         select GENERIC_MSI_IRQ_DOMAIN
316         help
317           Support for implementations of the ARM System MMU architecture
318           version 3 providing translation support to a PCIe root complex.
319 
320           Say Y here if your system includes an IOMMU device implementing
321           the ARM SMMUv3 architecture.
322 
323 config S390_IOMMU
324         def_bool y if S390 && PCI
325         depends on S390 && PCI
326         select IOMMU_API
327         help
328           Support for the IOMMU API for s390 PCI devices.
329 
330 config MTK_IOMMU
331         bool "MTK IOMMU Support"
332         depends on ARM || ARM64
333         depends on ARCH_MEDIATEK || COMPILE_TEST
334         select ARM_DMA_USE_IOMMU
335         select IOMMU_API
336         select IOMMU_DMA
337         select IOMMU_IO_PGTABLE_ARMV7S
338         select MEMORY
339         select MTK_SMI
340         help
341           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
342           Memory Management Unit. This option enables remapping of DMA memory
343           accesses for the multimedia subsystem.
344 
345           If unsure, say N here.
346 
347 config MTK_IOMMU_V1
348         bool "MTK IOMMU Version 1 (M4U gen1) Support"
349         depends on ARM
350         depends on ARCH_MEDIATEK || COMPILE_TEST
351         select ARM_DMA_USE_IOMMU
352         select IOMMU_API
353         select MEMORY
354         select MTK_SMI
355         select COMMON_CLK_MT2701_MMSYS
356         select COMMON_CLK_MT2701_IMGSYS
357         select COMMON_CLK_MT2701_VDECSYS
358         help
359           Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
360           Multimedia Memory Managememt Unit. This option enables remapping of
361           DMA memory accesses for the multimedia subsystem.
362 
363           if unsure, say N here.
364 
365 endif # IOMMU_SUPPORT

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