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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 && IOMMU_API
 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         bool "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 ROCKCHIP_IOMMU
156         bool "Rockchip IOMMU Support"
157         depends on ARM
158         depends on ARCH_ROCKCHIP || COMPILE_TEST
159         select IOMMU_API
160         select ARM_DMA_USE_IOMMU
161         help
162           Support for IOMMUs found on Rockchip rk32xx SOCs.
163           These IOMMUs allow virtualization of the address space used by most
164           cores within the multimedia subsystem.
165           Say Y here if you are using a Rockchip SoC that includes an IOMMU
166           device.
167 
168 config TEGRA_IOMMU_GART
169         bool "Tegra GART IOMMU Support"
170         depends on ARCH_TEGRA_2x_SOC
171         select IOMMU_API
172         help
173           Enables support for remapping discontiguous physical memory
174           shared with the operating system into contiguous I/O virtual
175           space through the GART (Graphics Address Relocation Table)
176           hardware included on Tegra SoCs.
177 
178 config TEGRA_IOMMU_SMMU
179         bool "NVIDIA Tegra SMMU Support"
180         depends on ARCH_TEGRA
181         depends on TEGRA_AHB
182         depends on TEGRA_MC
183         select IOMMU_API
184         help
185           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
186           SoCs (Tegra30 up to Tegra124).
187 
188 config EXYNOS_IOMMU
189         bool "Exynos IOMMU Support"
190         depends on ARCH_EXYNOS && ARM
191         select IOMMU_API
192         select ARM_DMA_USE_IOMMU
193         help
194           Support for the IOMMU (System MMU) of Samsung Exynos application
195           processor family. This enables H/W multimedia accelerators to see
196           non-linear physical memory chunks as linear memory in their
197           address space.
198 
199           If unsure, say N here.
200 
201 config EXYNOS_IOMMU_DEBUG
202         bool "Debugging log for Exynos IOMMU"
203         depends on EXYNOS_IOMMU
204         help
205           Select this to see the detailed log message that shows what
206           happens in the IOMMU driver.
207 
208           Say N unless you need kernel log message for IOMMU debugging.
209 
210 config SHMOBILE_IPMMU
211         bool
212 
213 config SHMOBILE_IPMMU_TLB
214         bool
215 
216 config SHMOBILE_IOMMU
217         bool "IOMMU for Renesas IPMMU/IPMMUI"
218         default n
219         depends on ARM
220         depends on ARCH_SHMOBILE || COMPILE_TEST
221         select IOMMU_API
222         select ARM_DMA_USE_IOMMU
223         select SHMOBILE_IPMMU
224         select SHMOBILE_IPMMU_TLB
225         help
226           Support for Renesas IPMMU/IPMMUI. This option enables
227           remapping of DMA memory accesses from all of the IP blocks
228           on the ICB.
229 
230           Warning: Drivers (including userspace drivers of UIO
231           devices) of the IP blocks on the ICB *must* use addresses
232           allocated from the IPMMU (iova) for DMA with this option
233           enabled.
234 
235           If unsure, say N.
236 
237 choice
238         prompt "IPMMU/IPMMUI address space size"
239         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
240         depends on SHMOBILE_IOMMU
241         help
242           This option sets IPMMU/IPMMUI address space size by
243           adjusting the 1st level page table size. The page table size
244           is calculated as follows:
245 
246               page table size = number of page table entries * 4 bytes
247               number of page table entries = address space size / 1 MiB
248 
249           For example, when the address space size is 2048 MiB, the
250           1st level page table size is 8192 bytes.
251 
252         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
253                 bool "2 GiB"
254 
255         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
256                 bool "1 GiB"
257 
258         config SHMOBILE_IOMMU_ADDRSIZE_512MB
259                 bool "512 MiB"
260 
261         config SHMOBILE_IOMMU_ADDRSIZE_256MB
262                 bool "256 MiB"
263 
264         config SHMOBILE_IOMMU_ADDRSIZE_128MB
265                 bool "128 MiB"
266 
267         config SHMOBILE_IOMMU_ADDRSIZE_64MB
268                 bool "64 MiB"
269 
270         config SHMOBILE_IOMMU_ADDRSIZE_32MB
271                 bool "32 MiB"
272 
273 endchoice
274 
275 config SHMOBILE_IOMMU_L1SIZE
276         int
277         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
278         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
279         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
280         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
281         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
282         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
283         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
284 
285 config IPMMU_VMSA
286         bool "Renesas VMSA-compatible IPMMU"
287         depends on ARM_LPAE
288         depends on ARCH_SHMOBILE || COMPILE_TEST
289         select IOMMU_API
290         select ARM_DMA_USE_IOMMU
291         help
292           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
293           R-Mobile APE6 and R-Car H2/M2 SoCs.
294 
295           If unsure, say N.
296 
297 config SPAPR_TCE_IOMMU
298         bool "sPAPR TCE IOMMU Support"
299         depends on PPC_POWERNV || PPC_PSERIES
300         select IOMMU_API
301         help
302           Enables bits of IOMMU API required by VFIO. The iommu_ops
303           is not implemented as it is not necessary for VFIO.
304 
305 config ARM_SMMU
306         bool "ARM Ltd. System MMU (SMMU) Support"
307         depends on ARM64 || (ARM_LPAE && OF)
308         select IOMMU_API
309         select ARM_DMA_USE_IOMMU if ARM
310         help
311           Support for implementations of the ARM System MMU architecture
312           versions 1 and 2. The driver supports both v7l and v8l table
313           formats with 4k and 64k page sizes.
314 
315           Say Y here if your SoC includes an IOMMU device implementing
316           the ARM SMMU architecture.
317 
318 endif # IOMMU_SUPPORT

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