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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         default y
  8         ---help---
  9           Say Y here if you want to compile device drivers for IO Memory
 10           Management Units into the kernel. These devices usually allow to
 11           remap DMA requests and/or remap interrupts from other devices on the
 12           system.
 13 
 14 if IOMMU_SUPPORT
 15 
 16 config OF_IOMMU
 17        def_bool y
 18        depends on OF
 19 
 20 config FSL_PAMU
 21         bool "Freescale IOMMU support"
 22         depends on PPC_E500MC
 23         select IOMMU_API
 24         select GENERIC_ALLOCATOR
 25         help
 26           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 27           PAMU can authorize memory access, remap the memory address, and remap I/O
 28           transaction types.
 29 
 30 # MSM IOMMU support
 31 config MSM_IOMMU
 32         bool "MSM IOMMU Support"
 33         depends on ARCH_MSM8X60 || ARCH_MSM8960
 34         select IOMMU_API
 35         help
 36           Support for the IOMMUs found on certain Qualcomm SOCs.
 37           These IOMMUs allow virtualization of the address space used by most
 38           cores within the multimedia subsystem.
 39 
 40           If unsure, say N here.
 41 
 42 config IOMMU_PGTABLES_L2
 43         def_bool y
 44         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 45 
 46 # AMD IOMMU support
 47 config AMD_IOMMU
 48         bool "AMD IOMMU support"
 49         select SWIOTLB
 50         select PCI_MSI
 51         select PCI_ATS
 52         select PCI_PRI
 53         select PCI_PASID
 54         select IOMMU_API
 55         depends on X86_64 && PCI && ACPI
 56         ---help---
 57           With this option you can enable support for AMD IOMMU hardware in
 58           your system. An IOMMU is a hardware component which provides
 59           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 60           can isolate the DMA memory of different devices and protect the
 61           system from misbehaving device drivers or hardware.
 62 
 63           You can find out if your system has an AMD IOMMU if you look into
 64           your BIOS for an option to enable it or if you have an IVRS ACPI
 65           table.
 66 
 67 config AMD_IOMMU_STATS
 68         bool "Export AMD IOMMU statistics to debugfs"
 69         depends on AMD_IOMMU
 70         select DEBUG_FS
 71         ---help---
 72           This option enables code in the AMD IOMMU driver to collect various
 73           statistics about whats happening in the driver and exports that
 74           information to userspace via debugfs.
 75           If unsure, say N.
 76 
 77 config AMD_IOMMU_V2
 78         tristate "AMD IOMMU Version 2 driver"
 79         depends on AMD_IOMMU
 80         select MMU_NOTIFIER
 81         ---help---
 82           This option enables support for the AMD IOMMUv2 features of the IOMMU
 83           hardware. Select this option if you want to use devices that support
 84           the PCI PRI and PASID interface.
 85 
 86 # Intel IOMMU support
 87 config DMAR_TABLE
 88         bool
 89 
 90 config INTEL_IOMMU
 91         bool "Support for Intel IOMMU using DMA Remapping Devices"
 92         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
 93         select IOMMU_API
 94         select DMAR_TABLE
 95         help
 96           DMA remapping (DMAR) devices support enables independent address
 97           translations for Direct Memory Access (DMA) from devices.
 98           These DMA remapping devices are reported via ACPI tables
 99           and include PCI device scope covered by these DMA
100           remapping devices.
101 
102 config INTEL_IOMMU_DEFAULT_ON
103         def_bool y
104         prompt "Enable Intel DMA Remapping Devices by default"
105         depends on INTEL_IOMMU
106         help
107           Selecting this option will enable a DMAR device at boot time if
108           one is found. If this option is not selected, DMAR support can
109           be enabled by passing intel_iommu=on to the kernel.
110 
111 config INTEL_IOMMU_BROKEN_GFX_WA
112         bool "Workaround broken graphics drivers (going away soon)"
113         depends on INTEL_IOMMU && BROKEN && X86
114         ---help---
115           Current Graphics drivers tend to use physical address
116           for DMA and avoid using DMA APIs. Setting this config
117           option permits the IOMMU driver to set a unity map for
118           all the OS-visible memory. Hence the driver can continue
119           to use physical addresses for DMA, at least until this
120           option is removed in the 2.6.32 kernel.
121 
122 config INTEL_IOMMU_FLOPPY_WA
123         def_bool y
124         depends on INTEL_IOMMU && X86
125         ---help---
126           Floppy disk drivers are known to bypass DMA API calls
127           thereby failing to work when IOMMU is enabled. This
128           workaround will setup a 1:1 mapping for the first
129           16MiB to make floppy (an ISA device) work.
130 
131 config IRQ_REMAP
132         bool "Support for Interrupt Remapping"
133         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
134         select DMAR_TABLE
135         ---help---
136           Supports Interrupt remapping for IO-APIC and MSI devices.
137           To use x2apic mode in the CPU's which support x2APIC enhancements or
138           to support platforms with CPU's having > 8 bit APIC ID, say Y.
139 
140 # OMAP IOMMU support
141 config OMAP_IOMMU
142         bool "OMAP IOMMU Support"
143         depends on ARCH_OMAP2PLUS
144         select IOMMU_API
145 
146 config OMAP_IOMMU_DEBUG
147        tristate "Export OMAP IOMMU internals in DebugFS"
148        depends on OMAP_IOMMU && DEBUG_FS
149        help
150          Select this to see extensive information about
151          the internal state of OMAP IOMMU in debugfs.
152 
153          Say N unless you know you need this.
154 
155 config TEGRA_IOMMU_GART
156         bool "Tegra GART IOMMU Support"
157         depends on ARCH_TEGRA_2x_SOC
158         select IOMMU_API
159         help
160           Enables support for remapping discontiguous physical memory
161           shared with the operating system into contiguous I/O virtual
162           space through the GART (Graphics Address Relocation Table)
163           hardware included on Tegra SoCs.
164 
165 config TEGRA_IOMMU_SMMU
166         bool "Tegra SMMU IOMMU Support"
167         depends on ARCH_TEGRA && TEGRA_AHB
168         select IOMMU_API
169         help
170           Enables support for remapping discontiguous physical memory
171           shared with the operating system into contiguous I/O virtual
172           space through the SMMU (System Memory Management Unit)
173           hardware included on Tegra SoCs.
174 
175 config EXYNOS_IOMMU
176         bool "Exynos IOMMU Support"
177         depends on ARCH_EXYNOS
178         select IOMMU_API
179         select ARM_DMA_USE_IOMMU
180         help
181           Support for the IOMMU (System MMU) of Samsung Exynos application
182           processor family. This enables H/W multimedia accelerators to see
183           non-linear physical memory chunks as linear memory in their
184           address space.
185 
186           If unsure, say N here.
187 
188 config EXYNOS_IOMMU_DEBUG
189         bool "Debugging log for Exynos IOMMU"
190         depends on EXYNOS_IOMMU
191         help
192           Select this to see the detailed log message that shows what
193           happens in the IOMMU driver.
194 
195           Say N unless you need kernel log message for IOMMU debugging.
196 
197 config SHMOBILE_IPMMU
198         bool
199 
200 config SHMOBILE_IPMMU_TLB
201         bool
202 
203 config SHMOBILE_IOMMU
204         bool "IOMMU for Renesas IPMMU/IPMMUI"
205         default n
206         depends on ARM
207         depends on ARCH_SHMOBILE || COMPILE_TEST
208         select IOMMU_API
209         select ARM_DMA_USE_IOMMU
210         select SHMOBILE_IPMMU
211         select SHMOBILE_IPMMU_TLB
212         help
213           Support for Renesas IPMMU/IPMMUI. This option enables
214           remapping of DMA memory accesses from all of the IP blocks
215           on the ICB.
216 
217           Warning: Drivers (including userspace drivers of UIO
218           devices) of the IP blocks on the ICB *must* use addresses
219           allocated from the IPMMU (iova) for DMA with this option
220           enabled.
221 
222           If unsure, say N.
223 
224 choice
225         prompt "IPMMU/IPMMUI address space size"
226         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
227         depends on SHMOBILE_IOMMU
228         help
229           This option sets IPMMU/IPMMUI address space size by
230           adjusting the 1st level page table size. The page table size
231           is calculated as follows:
232 
233               page table size = number of page table entries * 4 bytes
234               number of page table entries = address space size / 1 MiB
235 
236           For example, when the address space size is 2048 MiB, the
237           1st level page table size is 8192 bytes.
238 
239         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
240                 bool "2 GiB"
241 
242         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
243                 bool "1 GiB"
244 
245         config SHMOBILE_IOMMU_ADDRSIZE_512MB
246                 bool "512 MiB"
247 
248         config SHMOBILE_IOMMU_ADDRSIZE_256MB
249                 bool "256 MiB"
250 
251         config SHMOBILE_IOMMU_ADDRSIZE_128MB
252                 bool "128 MiB"
253 
254         config SHMOBILE_IOMMU_ADDRSIZE_64MB
255                 bool "64 MiB"
256 
257         config SHMOBILE_IOMMU_ADDRSIZE_32MB
258                 bool "32 MiB"
259 
260 endchoice
261 
262 config SHMOBILE_IOMMU_L1SIZE
263         int
264         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
265         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
266         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
267         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
268         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
269         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
270         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
271 
272 config IPMMU_VMSA
273         bool "Renesas VMSA-compatible IPMMU"
274         depends on ARM_LPAE
275         depends on ARCH_SHMOBILE || COMPILE_TEST
276         select IOMMU_API
277         select ARM_DMA_USE_IOMMU
278         help
279           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
280           R-Mobile APE6 and R-Car H2/M2 SoCs.
281 
282           If unsure, say N.
283 
284 config SPAPR_TCE_IOMMU
285         bool "sPAPR TCE IOMMU Support"
286         depends on PPC_POWERNV || PPC_PSERIES
287         select IOMMU_API
288         help
289           Enables bits of IOMMU API required by VFIO. The iommu_ops
290           is not implemented as it is not necessary for VFIO.
291 
292 config ARM_SMMU
293         bool "ARM Ltd. System MMU (SMMU) Support"
294         depends on ARM64 || (ARM_LPAE && OF)
295         select IOMMU_API
296         select ARM_DMA_USE_IOMMU if ARM
297         help
298           Support for implementations of the ARM System MMU architecture
299           versions 1 and 2. The driver supports both v7l and v8l table
300           formats with 4k and 64k page sizes.
301 
302           Say Y here if your SoC includes an IOMMU device implementing
303           the ARM SMMU architecture.
304 
305 endif # IOMMU_SUPPORT

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