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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 PPC32
 80         depends on PPC_E500MC || COMPILE_TEST
 81         select IOMMU_API
 82         select GENERIC_ALLOCATOR
 83         help
 84           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 85           PAMU can authorize memory access, remap the memory address, and remap I/O
 86           transaction types.
 87 
 88 # MSM IOMMU support
 89 config MSM_IOMMU
 90         bool "MSM IOMMU Support"
 91         depends on ARM
 92         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 93         depends on BROKEN
 94         select IOMMU_API
 95         help
 96           Support for the IOMMUs found on certain Qualcomm SOCs.
 97           These IOMMUs allow virtualization of the address space used by most
 98           cores within the multimedia subsystem.
 99 
100           If unsure, say N here.
101 
102 config IOMMU_PGTABLES_L2
103         def_bool y
104         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
105 
106 # AMD IOMMU support
107 config AMD_IOMMU
108         bool "AMD IOMMU support"
109         select SWIOTLB
110         select PCI_MSI
111         select PCI_ATS
112         select PCI_PRI
113         select PCI_PASID
114         select IOMMU_API
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_STATS
128         bool "Export AMD IOMMU statistics to debugfs"
129         depends on AMD_IOMMU
130         select DEBUG_FS
131         ---help---
132           This option enables code in the AMD IOMMU driver to collect various
133           statistics about whats happening in the driver and exports that
134           information to userspace via debugfs.
135           If unsure, say N.
136 
137 config AMD_IOMMU_V2
138         tristate "AMD IOMMU Version 2 driver"
139         depends on AMD_IOMMU
140         select MMU_NOTIFIER
141         ---help---
142           This option enables support for the AMD IOMMUv2 features of the IOMMU
143           hardware. Select this option if you want to use devices that support
144           the PCI PRI and PASID interface.
145 
146 # Intel IOMMU support
147 config DMAR_TABLE
148         bool
149 
150 config INTEL_IOMMU
151         bool "Support for Intel IOMMU using DMA Remapping Devices"
152         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
153         select IOMMU_API
154         select IOMMU_IOVA
155         select DMAR_TABLE
156         help
157           DMA remapping (DMAR) devices support enables independent address
158           translations for Direct Memory Access (DMA) from devices.
159           These DMA remapping devices are reported via ACPI tables
160           and include PCI device scope covered by these DMA
161           remapping devices.
162 
163 config INTEL_IOMMU_SVM
164         bool "Support for Shared Virtual Memory with Intel IOMMU"
165         depends on INTEL_IOMMU && X86
166         select PCI_PASID
167         select MMU_NOTIFIER
168         help
169           Shared Virtual Memory (SVM) provides a facility for devices
170           to access DMA resources through process address space by
171           means of a Process Address Space ID (PASID).
172 
173 config INTEL_IOMMU_DEFAULT_ON
174         def_bool y
175         prompt "Enable Intel DMA Remapping Devices by default"
176         depends on INTEL_IOMMU
177         help
178           Selecting this option will enable a DMAR device at boot time if
179           one is found. If this option is not selected, DMAR support can
180           be enabled by passing intel_iommu=on to the kernel.
181 
182 config INTEL_IOMMU_BROKEN_GFX_WA
183         bool "Workaround broken graphics drivers (going away soon)"
184         depends on INTEL_IOMMU && BROKEN && X86
185         ---help---
186           Current Graphics drivers tend to use physical address
187           for DMA and avoid using DMA APIs. Setting this config
188           option permits the IOMMU driver to set a unity map for
189           all the OS-visible memory. Hence the driver can continue
190           to use physical addresses for DMA, at least until this
191           option is removed in the 2.6.32 kernel.
192 
193 config INTEL_IOMMU_FLOPPY_WA
194         def_bool y
195         depends on INTEL_IOMMU && X86
196         ---help---
197           Floppy disk drivers are known to bypass DMA API calls
198           thereby failing to work when IOMMU is enabled. This
199           workaround will setup a 1:1 mapping for the first
200           16MiB to make floppy (an ISA device) work.
201 
202 config IRQ_REMAP
203         bool "Support for Interrupt Remapping"
204         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
205         select DMAR_TABLE
206         ---help---
207           Supports Interrupt remapping for IO-APIC and MSI devices.
208           To use x2apic mode in the CPU's which support x2APIC enhancements or
209           to support platforms with CPU's having > 8 bit APIC ID, say Y.
210 
211 # OMAP IOMMU support
212 config OMAP_IOMMU
213         bool "OMAP IOMMU Support"
214         depends on ARM && MMU
215         depends on ARCH_OMAP2PLUS || COMPILE_TEST
216         select IOMMU_API
217         ---help---
218           The OMAP3 media platform drivers depend on iommu support,
219           if you need them say Y here.
220 
221 config OMAP_IOMMU_DEBUG
222         bool "Export OMAP IOMMU internals in DebugFS"
223         depends on OMAP_IOMMU && DEBUG_FS
224         ---help---
225           Select this to see extensive information about
226           the internal state of OMAP IOMMU in debugfs.
227 
228           Say N unless you know you need this.
229 
230 config ROCKCHIP_IOMMU
231         bool "Rockchip IOMMU Support"
232         depends on ARM
233         depends on ARCH_ROCKCHIP || COMPILE_TEST
234         select IOMMU_API
235         select ARM_DMA_USE_IOMMU
236         help
237           Support for IOMMUs found on Rockchip rk32xx SOCs.
238           These IOMMUs allow virtualization of the address space used by most
239           cores within the multimedia subsystem.
240           Say Y here if you are using a Rockchip SoC that includes an IOMMU
241           device.
242 
243 config TEGRA_IOMMU_GART
244         bool "Tegra GART IOMMU Support"
245         depends on ARCH_TEGRA_2x_SOC
246         select IOMMU_API
247         help
248           Enables support for remapping discontiguous physical memory
249           shared with the operating system into contiguous I/O virtual
250           space through the GART (Graphics Address Relocation Table)
251           hardware included on Tegra SoCs.
252 
253 config TEGRA_IOMMU_SMMU
254         bool "NVIDIA Tegra SMMU Support"
255         depends on ARCH_TEGRA
256         depends on TEGRA_AHB
257         depends on TEGRA_MC
258         select IOMMU_API
259         help
260           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
261           SoCs (Tegra30 up to Tegra210).
262 
263 config EXYNOS_IOMMU
264         bool "Exynos IOMMU Support"
265         depends on ARCH_EXYNOS && MMU
266         select IOMMU_API
267         select ARM_DMA_USE_IOMMU
268         help
269           Support for the IOMMU (System MMU) of Samsung Exynos application
270           processor family. This enables H/W multimedia accelerators to see
271           non-linear physical memory chunks as linear memory in their
272           address space.
273 
274           If unsure, say N here.
275 
276 config EXYNOS_IOMMU_DEBUG
277         bool "Debugging log for Exynos IOMMU"
278         depends on EXYNOS_IOMMU
279         help
280           Select this to see the detailed log message that shows what
281           happens in the IOMMU driver.
282 
283           Say N unless you need kernel log message for IOMMU debugging.
284 
285 config IPMMU_VMSA
286         bool "Renesas VMSA-compatible IPMMU"
287         depends on ARM_LPAE
288         depends on ARCH_RENESAS || COMPILE_TEST
289         select IOMMU_API
290         select IOMMU_IO_PGTABLE_LPAE
291         select ARM_DMA_USE_IOMMU
292         help
293           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
294           R-Mobile APE6 and R-Car H2/M2 SoCs.
295 
296           If unsure, say N.
297 
298 config SPAPR_TCE_IOMMU
299         bool "sPAPR TCE IOMMU Support"
300         depends on PPC_POWERNV || PPC_PSERIES
301         select IOMMU_API
302         help
303           Enables bits of IOMMU API required by VFIO. The iommu_ops
304           is not implemented as it is not necessary for VFIO.
305 
306 # ARM IOMMU support
307 config ARM_SMMU
308         bool "ARM Ltd. System MMU (SMMU) Support"
309         depends on (ARM64 || ARM) && MMU
310         select IOMMU_API
311         select IOMMU_IO_PGTABLE_LPAE
312         select ARM_DMA_USE_IOMMU if ARM
313         help
314           Support for implementations of the ARM System MMU architecture
315           versions 1 and 2.
316 
317           Say Y here if your SoC includes an IOMMU device implementing
318           the ARM SMMU architecture.
319 
320 config ARM_SMMU_V3
321         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
322         depends on ARM64 && PCI
323         select IOMMU_API
324         select IOMMU_IO_PGTABLE_LPAE
325         select GENERIC_MSI_IRQ_DOMAIN
326         help
327           Support for implementations of the ARM System MMU architecture
328           version 3 providing translation support to a PCIe root complex.
329 
330           Say Y here if your system includes an IOMMU device implementing
331           the ARM SMMUv3 architecture.
332 
333 config S390_IOMMU
334         def_bool y if S390 && PCI
335         depends on S390 && PCI
336         select IOMMU_API
337         help
338           Support for the IOMMU API for s390 PCI devices.
339 
340 config MTK_IOMMU
341         bool "MTK IOMMU Support"
342         depends on ARM || ARM64
343         depends on ARCH_MEDIATEK || COMPILE_TEST
344         select ARM_DMA_USE_IOMMU
345         select IOMMU_API
346         select IOMMU_DMA
347         select IOMMU_IO_PGTABLE_ARMV7S
348         select MEMORY
349         select MTK_SMI
350         help
351           Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
352           Memory Management Unit. This option enables remapping of DMA memory
353           accesses for the multimedia subsystem.
354 
355           If unsure, say N here.
356 
357 endif # IOMMU_SUPPORT

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