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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 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         bool
 46 
 47 config OF_IOMMU
 48        def_bool y
 49        depends on OF && IOMMU_API
 50 
 51 config FSL_PAMU
 52         bool "Freescale IOMMU support"
 53         depends on PPC32
 54         depends on PPC_E500MC || COMPILE_TEST
 55         select IOMMU_API
 56         select GENERIC_ALLOCATOR
 57         help
 58           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
 59           PAMU can authorize memory access, remap the memory address, and remap I/O
 60           transaction types.
 61 
 62 # MSM IOMMU support
 63 config MSM_IOMMU
 64         bool "MSM IOMMU Support"
 65         depends on ARM
 66         depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
 67         depends on BROKEN
 68         select IOMMU_API
 69         help
 70           Support for the IOMMUs found on certain Qualcomm SOCs.
 71           These IOMMUs allow virtualization of the address space used by most
 72           cores within the multimedia subsystem.
 73 
 74           If unsure, say N here.
 75 
 76 config IOMMU_PGTABLES_L2
 77         def_bool y
 78         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
 79 
 80 # AMD IOMMU support
 81 config AMD_IOMMU
 82         bool "AMD IOMMU support"
 83         select SWIOTLB
 84         select PCI_MSI
 85         select PCI_ATS
 86         select PCI_PRI
 87         select PCI_PASID
 88         select IOMMU_API
 89         depends on X86_64 && PCI && ACPI
 90         ---help---
 91           With this option you can enable support for AMD IOMMU hardware in
 92           your system. An IOMMU is a hardware component which provides
 93           remapping of DMA memory accesses from devices. With an AMD IOMMU you
 94           can isolate the DMA memory of different devices and protect the
 95           system from misbehaving device drivers or hardware.
 96 
 97           You can find out if your system has an AMD IOMMU if you look into
 98           your BIOS for an option to enable it or if you have an IVRS ACPI
 99           table.
100 
101 config AMD_IOMMU_STATS
102         bool "Export AMD IOMMU statistics to debugfs"
103         depends on AMD_IOMMU
104         select DEBUG_FS
105         ---help---
106           This option enables code in the AMD IOMMU driver to collect various
107           statistics about whats happening in the driver and exports that
108           information to userspace via debugfs.
109           If unsure, say N.
110 
111 config AMD_IOMMU_V2
112         tristate "AMD IOMMU Version 2 driver"
113         depends on AMD_IOMMU
114         select MMU_NOTIFIER
115         ---help---
116           This option enables support for the AMD IOMMUv2 features of the IOMMU
117           hardware. Select this option if you want to use devices that support
118           the PCI PRI and PASID interface.
119 
120 # Intel IOMMU support
121 config DMAR_TABLE
122         bool
123 
124 config INTEL_IOMMU
125         bool "Support for Intel IOMMU using DMA Remapping Devices"
126         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
127         select IOMMU_API
128         select IOMMU_IOVA
129         select DMAR_TABLE
130         help
131           DMA remapping (DMAR) devices support enables independent address
132           translations for Direct Memory Access (DMA) from devices.
133           These DMA remapping devices are reported via ACPI tables
134           and include PCI device scope covered by these DMA
135           remapping devices.
136 
137 config INTEL_IOMMU_DEFAULT_ON
138         def_bool y
139         prompt "Enable Intel DMA Remapping Devices by default"
140         depends on INTEL_IOMMU
141         help
142           Selecting this option will enable a DMAR device at boot time if
143           one is found. If this option is not selected, DMAR support can
144           be enabled by passing intel_iommu=on to the kernel.
145 
146 config INTEL_IOMMU_BROKEN_GFX_WA
147         bool "Workaround broken graphics drivers (going away soon)"
148         depends on INTEL_IOMMU && BROKEN && X86
149         ---help---
150           Current Graphics drivers tend to use physical address
151           for DMA and avoid using DMA APIs. Setting this config
152           option permits the IOMMU driver to set a unity map for
153           all the OS-visible memory. Hence the driver can continue
154           to use physical addresses for DMA, at least until this
155           option is removed in the 2.6.32 kernel.
156 
157 config INTEL_IOMMU_FLOPPY_WA
158         def_bool y
159         depends on INTEL_IOMMU && X86
160         ---help---
161           Floppy disk drivers are known to bypass DMA API calls
162           thereby failing to work when IOMMU is enabled. This
163           workaround will setup a 1:1 mapping for the first
164           16MiB to make floppy (an ISA device) work.
165 
166 config IRQ_REMAP
167         bool "Support for Interrupt Remapping"
168         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
169         select DMAR_TABLE
170         ---help---
171           Supports Interrupt remapping for IO-APIC and MSI devices.
172           To use x2apic mode in the CPU's which support x2APIC enhancements or
173           to support platforms with CPU's having > 8 bit APIC ID, say Y.
174 
175 # OMAP IOMMU support
176 config OMAP_IOMMU
177         bool "OMAP IOMMU Support"
178         depends on ARM && MMU
179         depends on ARCH_OMAP2PLUS || COMPILE_TEST
180         select IOMMU_API
181 
182 config OMAP_IOMMU_DEBUG
183         bool "Export OMAP IOMMU internals in DebugFS"
184         depends on OMAP_IOMMU && DEBUG_FS
185         ---help---
186           Select this to see extensive information about
187           the internal state of OMAP IOMMU in debugfs.
188 
189           Say N unless you know you need this.
190 
191 config ROCKCHIP_IOMMU
192         bool "Rockchip IOMMU Support"
193         depends on ARM
194         depends on ARCH_ROCKCHIP || COMPILE_TEST
195         select IOMMU_API
196         select ARM_DMA_USE_IOMMU
197         help
198           Support for IOMMUs found on Rockchip rk32xx SOCs.
199           These IOMMUs allow virtualization of the address space used by most
200           cores within the multimedia subsystem.
201           Say Y here if you are using a Rockchip SoC that includes an IOMMU
202           device.
203 
204 config TEGRA_IOMMU_GART
205         bool "Tegra GART IOMMU Support"
206         depends on ARCH_TEGRA_2x_SOC
207         select IOMMU_API
208         help
209           Enables support for remapping discontiguous physical memory
210           shared with the operating system into contiguous I/O virtual
211           space through the GART (Graphics Address Relocation Table)
212           hardware included on Tegra SoCs.
213 
214 config TEGRA_IOMMU_SMMU
215         bool "NVIDIA Tegra SMMU Support"
216         depends on ARCH_TEGRA
217         depends on TEGRA_AHB
218         depends on TEGRA_MC
219         select IOMMU_API
220         help
221           This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
222           SoCs (Tegra30 up to Tegra124).
223 
224 config EXYNOS_IOMMU
225         bool "Exynos IOMMU Support"
226         depends on ARCH_EXYNOS && ARM && MMU
227         select IOMMU_API
228         select ARM_DMA_USE_IOMMU
229         help
230           Support for the IOMMU (System MMU) of Samsung Exynos application
231           processor family. This enables H/W multimedia accelerators to see
232           non-linear physical memory chunks as linear memory in their
233           address space.
234 
235           If unsure, say N here.
236 
237 config EXYNOS_IOMMU_DEBUG
238         bool "Debugging log for Exynos IOMMU"
239         depends on EXYNOS_IOMMU
240         help
241           Select this to see the detailed log message that shows what
242           happens in the IOMMU driver.
243 
244           Say N unless you need kernel log message for IOMMU debugging.
245 
246 config SHMOBILE_IPMMU
247         bool
248 
249 config SHMOBILE_IPMMU_TLB
250         bool
251 
252 config SHMOBILE_IOMMU
253         bool "IOMMU for Renesas IPMMU/IPMMUI"
254         default n
255         depends on ARM && MMU
256         depends on ARCH_SHMOBILE || COMPILE_TEST
257         select IOMMU_API
258         select ARM_DMA_USE_IOMMU
259         select SHMOBILE_IPMMU
260         select SHMOBILE_IPMMU_TLB
261         help
262           Support for Renesas IPMMU/IPMMUI. This option enables
263           remapping of DMA memory accesses from all of the IP blocks
264           on the ICB.
265 
266           Warning: Drivers (including userspace drivers of UIO
267           devices) of the IP blocks on the ICB *must* use addresses
268           allocated from the IPMMU (iova) for DMA with this option
269           enabled.
270 
271           If unsure, say N.
272 
273 choice
274         prompt "IPMMU/IPMMUI address space size"
275         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
276         depends on SHMOBILE_IOMMU
277         help
278           This option sets IPMMU/IPMMUI address space size by
279           adjusting the 1st level page table size. The page table size
280           is calculated as follows:
281 
282               page table size = number of page table entries * 4 bytes
283               number of page table entries = address space size / 1 MiB
284 
285           For example, when the address space size is 2048 MiB, the
286           1st level page table size is 8192 bytes.
287 
288         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
289                 bool "2 GiB"
290 
291         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
292                 bool "1 GiB"
293 
294         config SHMOBILE_IOMMU_ADDRSIZE_512MB
295                 bool "512 MiB"
296 
297         config SHMOBILE_IOMMU_ADDRSIZE_256MB
298                 bool "256 MiB"
299 
300         config SHMOBILE_IOMMU_ADDRSIZE_128MB
301                 bool "128 MiB"
302 
303         config SHMOBILE_IOMMU_ADDRSIZE_64MB
304                 bool "64 MiB"
305 
306         config SHMOBILE_IOMMU_ADDRSIZE_32MB
307                 bool "32 MiB"
308 
309 endchoice
310 
311 config SHMOBILE_IOMMU_L1SIZE
312         int
313         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
314         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
315         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
316         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
317         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
318         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
319         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
320 
321 config IPMMU_VMSA
322         bool "Renesas VMSA-compatible IPMMU"
323         depends on ARM_LPAE
324         depends on ARCH_SHMOBILE || COMPILE_TEST
325         select IOMMU_API
326         select IOMMU_IO_PGTABLE_LPAE
327         select ARM_DMA_USE_IOMMU
328         help
329           Support for the Renesas VMSA-compatible IPMMU Renesas found in the
330           R-Mobile APE6 and R-Car H2/M2 SoCs.
331 
332           If unsure, say N.
333 
334 config SPAPR_TCE_IOMMU
335         bool "sPAPR TCE IOMMU Support"
336         depends on PPC_POWERNV || PPC_PSERIES
337         select IOMMU_API
338         help
339           Enables bits of IOMMU API required by VFIO. The iommu_ops
340           is not implemented as it is not necessary for VFIO.
341 
342 config ARM_SMMU
343         bool "ARM Ltd. System MMU (SMMU) Support"
344         depends on (ARM64 || ARM) && MMU
345         select IOMMU_API
346         select IOMMU_IO_PGTABLE_LPAE
347         select ARM_DMA_USE_IOMMU if ARM
348         help
349           Support for implementations of the ARM System MMU architecture
350           versions 1 and 2.
351 
352           Say Y here if your SoC includes an IOMMU device implementing
353           the ARM SMMU architecture.
354 
355 endif # IOMMU_SUPPORT

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