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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 endmenu
 43 
 44 config IOMMU_IOVA
 45         tristate
 46 
 47 config OF_IOMMU
 48        def_bool y
 49        depends on OF && IOMMU_API
 50 
 51 # IOMMU-agnostic DMA-mapping layer
 52 config IOMMU_DMA
 53         bool
 54         depends on NEED_SG_DMA_LENGTH
 55         select IOMMU_API
 56         select IOMMU_IOVA
 57 
 58 config FSL_PAMU
 59         bool "Freescale IOMMU support"
 60         depends on PPC32
 61         depends on PPC_E500MC || COMPILE_TEST
 62         select IOMMU_API
 63         select GENERIC_ALLOCATOR
 64         help
 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
 67           transaction types.
 68 
 69 # MSM IOMMU support
 70 config MSM_IOMMU
 71         bool "MSM IOMMU Support"
 72         depends on ARM
 73         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 74         depends on BROKEN
 75         select IOMMU_API
 76         help
 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.
 80 
 81           If unsure, say N here.
 82 
 83 config IOMMU_PGTABLES_L2
 84         def_bool y
 85         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 86 
 87 # AMD IOMMU support
 88 config AMD_IOMMU
 89         bool "AMD IOMMU support"
 90         select SWIOTLB
 91         select PCI_MSI
 92         select PCI_ATS
 93         select PCI_PRI
 94         select PCI_PASID
 95         select IOMMU_API
 96         depends on X86_64 && PCI && ACPI
 97         ---help---
 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.
103 
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
106           table.
107 
108 config AMD_IOMMU_STATS
109         bool "Export AMD IOMMU statistics to debugfs"
110         depends on AMD_IOMMU
111         select DEBUG_FS
112         ---help---
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.
116           If unsure, say N.
117 
118 config AMD_IOMMU_V2
119         tristate "AMD IOMMU Version 2 driver"
120         depends on AMD_IOMMU
121         select MMU_NOTIFIER
122         ---help---
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.
126 
127 # Intel IOMMU support
128 config DMAR_TABLE
129         bool
130 
131 config INTEL_IOMMU
132         bool "Support for Intel IOMMU using DMA Remapping Devices"
133         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
134         select IOMMU_API
135         select IOMMU_IOVA
136         select DMAR_TABLE
137         help
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
142           remapping devices.
143 
144 config INTEL_IOMMU_SVM
145         bool "Support for Shared Virtual Memory with Intel IOMMU"
146         depends on INTEL_IOMMU && X86
147         select PCI_PASID
148         select MMU_NOTIFIER
149         help
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).
153 
154 config INTEL_IOMMU_DEFAULT_ON
155         def_bool y
156         prompt "Enable Intel DMA Remapping Devices by default"
157         depends on INTEL_IOMMU
158         help
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.
162 
163 config INTEL_IOMMU_BROKEN_GFX_WA
164         bool "Workaround broken graphics drivers (going away soon)"
165         depends on INTEL_IOMMU && BROKEN && X86
166         ---help---
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.
173 
174 config INTEL_IOMMU_FLOPPY_WA
175         def_bool y
176         depends on INTEL_IOMMU && X86
177         ---help---
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.
182 
183 config IRQ_REMAP
184         bool "Support for Interrupt Remapping"
185         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
186         select DMAR_TABLE
187         ---help---
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.
191 
192 # OMAP IOMMU support
193 config OMAP_IOMMU
194         bool "OMAP IOMMU Support"
195         depends on ARM && MMU
196         depends on ARCH_OMAP2PLUS || COMPILE_TEST
197         select IOMMU_API
198         ---help---
199           The OMAP3 media platform drivers depend on iommu support,
200           if you need them say Y here.
201 
202 config OMAP_IOMMU_DEBUG
203         bool "Export OMAP IOMMU internals in DebugFS"
204         depends on OMAP_IOMMU && DEBUG_FS
205         ---help---
206           Select this to see extensive information about
207           the internal state of OMAP IOMMU in debugfs.
208 
209           Say N unless you know you need this.
210 
211 config ROCKCHIP_IOMMU
212         bool "Rockchip IOMMU Support"
213         depends on ARM
214         depends on ARCH_ROCKCHIP || COMPILE_TEST
215         select IOMMU_API
216         select ARM_DMA_USE_IOMMU
217         help
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
222           device.
223 
224 config TEGRA_IOMMU_GART
225         bool "Tegra GART IOMMU Support"
226         depends on ARCH_TEGRA_2x_SOC
227         select IOMMU_API
228         help
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.
233 
234 config TEGRA_IOMMU_SMMU
235         bool "NVIDIA Tegra SMMU Support"
236         depends on ARCH_TEGRA
237         depends on TEGRA_AHB
238         depends on TEGRA_MC
239         select IOMMU_API
240         help
241           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
242           SoCs (Tegra30 up to Tegra210).
243 
244 config EXYNOS_IOMMU
245         bool "Exynos IOMMU Support"
246         depends on ARCH_EXYNOS && ARM && MMU
247         select IOMMU_API
248         select ARM_DMA_USE_IOMMU
249         help
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
253           address space.
254 
255           If unsure, say N here.
256 
257 config EXYNOS_IOMMU_DEBUG
258         bool "Debugging log for Exynos IOMMU"
259         depends on EXYNOS_IOMMU
260         help
261           Select this to see the detailed log message that shows what
262           happens in the IOMMU driver.
263 
264           Say N unless you need kernel log message for IOMMU debugging.
265 
266 config IPMMU_VMSA
267         bool "Renesas VMSA-compatible IPMMU"
268         depends on ARM_LPAE
269         depends on ARCH_SHMOBILE || COMPILE_TEST
270         select IOMMU_API
271         select IOMMU_IO_PGTABLE_LPAE
272         select ARM_DMA_USE_IOMMU
273         help
274           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
275           R-Mobile APE6 and R-Car H2/M2 SoCs.
276 
277           If unsure, say N.
278 
279 config SPAPR_TCE_IOMMU
280         bool "sPAPR TCE IOMMU Support"
281         depends on PPC_POWERNV || PPC_PSERIES
282         select IOMMU_API
283         help
284           Enables bits of IOMMU API required by VFIO. The iommu_ops
285           is not implemented as it is not necessary for VFIO.
286 
287 # ARM IOMMU support
288 config ARM_SMMU
289         bool "ARM Ltd. System MMU (SMMU) Support"
290         depends on (ARM64 || ARM) && MMU
291         select IOMMU_API
292         select IOMMU_IO_PGTABLE_LPAE
293         select ARM_DMA_USE_IOMMU if ARM
294         help
295           Support for implementations of the ARM System MMU architecture
296           versions 1 and 2.
297 
298           Say Y here if your SoC includes an IOMMU device implementing
299           the ARM SMMU architecture.
300 
301 config ARM_SMMU_V3
302         bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
303         depends on ARM64 && PCI
304         select IOMMU_API
305         select IOMMU_IO_PGTABLE_LPAE
306         select GENERIC_MSI_IRQ_DOMAIN
307         help
308           Support for implementations of the ARM System MMU architecture
309           version 3 providing translation support to a PCIe root complex.
310 
311           Say Y here if your system includes an IOMMU device implementing
312           the ARM SMMUv3 architecture.
313 
314 config S390_IOMMU
315         def_bool y if S390 && PCI
316         depends on S390 && PCI
317         select IOMMU_API
318         help
319           Support for the IOMMU API for s390 PCI devices.
320 
321 endif # IOMMU_SUPPORT

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