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Linux/arch/arm64/Kconfig

  1 config ARM64
  2         def_bool y
  3         select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  4         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  5         select ARCH_HAS_SG_CHAIN
  6         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  7         select ARCH_USE_CMPXCHG_LOCKREF
  8         select ARCH_SUPPORTS_ATOMIC_RMW
  9         select ARCH_WANT_OPTIONAL_GPIOLIB
 10         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
 11         select ARCH_WANT_FRAME_POINTERS
 12         select ARM_AMBA
 13         select ARM_ARCH_TIMER
 14         select ARM_GIC
 15         select AUDIT_ARCH_COMPAT_GENERIC
 16         select ARM_GIC_V3
 17         select BUILDTIME_EXTABLE_SORT
 18         select CLONE_BACKWARDS
 19         select COMMON_CLK
 20         select CPU_PM if (SUSPEND || CPU_IDLE)
 21         select DCACHE_WORD_ACCESS
 22         select GENERIC_ALLOCATOR
 23         select GENERIC_CLOCKEVENTS
 24         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 25         select GENERIC_CPU_AUTOPROBE
 26         select GENERIC_EARLY_IOREMAP
 27         select GENERIC_IOMAP
 28         select GENERIC_IRQ_PROBE
 29         select GENERIC_IRQ_SHOW
 30         select GENERIC_SCHED_CLOCK
 31         select GENERIC_SMP_IDLE_THREAD
 32         select GENERIC_STRNCPY_FROM_USER
 33         select GENERIC_STRNLEN_USER
 34         select GENERIC_TIME_VSYSCALL
 35         select HANDLE_DOMAIN_IRQ
 36         select HARDIRQS_SW_RESEND
 37         select HAVE_ARCH_AUDITSYSCALL
 38         select HAVE_ARCH_JUMP_LABEL
 39         select HAVE_ARCH_KGDB
 40         select HAVE_ARCH_TRACEHOOK
 41         select HAVE_BPF_JIT
 42         select HAVE_C_RECORDMCOUNT
 43         select HAVE_CC_STACKPROTECTOR
 44         select HAVE_DEBUG_BUGVERBOSE
 45         select HAVE_DEBUG_KMEMLEAK
 46         select HAVE_DMA_API_DEBUG
 47         select HAVE_DMA_ATTRS
 48         select HAVE_DMA_CONTIGUOUS
 49         select HAVE_DYNAMIC_FTRACE
 50         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 51         select HAVE_FTRACE_MCOUNT_RECORD
 52         select HAVE_FUNCTION_TRACER
 53         select HAVE_FUNCTION_GRAPH_TRACER
 54         select HAVE_GENERIC_DMA_COHERENT
 55         select HAVE_HW_BREAKPOINT if PERF_EVENTS
 56         select HAVE_MEMBLOCK
 57         select HAVE_PATA_PLATFORM
 58         select HAVE_PERF_EVENTS
 59         select HAVE_PERF_REGS
 60         select HAVE_PERF_USER_STACK_DUMP
 61         select HAVE_RCU_TABLE_FREE
 62         select HAVE_SYSCALL_TRACEPOINTS
 63         select IRQ_DOMAIN
 64         select MODULES_USE_ELF_RELA
 65         select NO_BOOTMEM
 66         select OF
 67         select OF_EARLY_FLATTREE
 68         select OF_RESERVED_MEM
 69         select PERF_USE_VMALLOC
 70         select POWER_RESET
 71         select POWER_SUPPLY
 72         select RTC_LIB
 73         select SPARSE_IRQ
 74         select SYSCTL_EXCEPTION_TRACE
 75         select HAVE_CONTEXT_TRACKING
 76         help
 77           ARM 64-bit (AArch64) Linux support.
 78 
 79 config 64BIT
 80         def_bool y
 81 
 82 config ARCH_PHYS_ADDR_T_64BIT
 83         def_bool y
 84 
 85 config MMU
 86         def_bool y
 87 
 88 config NO_IOPORT_MAP
 89         def_bool y if !PCI
 90 
 91 config STACKTRACE_SUPPORT
 92         def_bool y
 93 
 94 config LOCKDEP_SUPPORT
 95         def_bool y
 96 
 97 config TRACE_IRQFLAGS_SUPPORT
 98         def_bool y
 99 
100 config RWSEM_XCHGADD_ALGORITHM
101         def_bool y
102 
103 config GENERIC_HWEIGHT
104         def_bool y
105 
106 config GENERIC_CSUM
107         def_bool y
108 
109 config GENERIC_CALIBRATE_DELAY
110         def_bool y
111 
112 config ZONE_DMA
113         def_bool y
114 
115 config HAVE_GENERIC_RCU_GUP
116         def_bool y
117 
118 config ARCH_DMA_ADDR_T_64BIT
119         def_bool y
120 
121 config NEED_DMA_MAP_STATE
122         def_bool y
123 
124 config NEED_SG_DMA_LENGTH
125         def_bool y
126 
127 config SWIOTLB
128         def_bool y
129 
130 config IOMMU_HELPER
131         def_bool SWIOTLB
132 
133 config KERNEL_MODE_NEON
134         def_bool y
135 
136 config FIX_EARLYCON_MEM
137         def_bool y
138 
139 source "init/Kconfig"
140 
141 source "kernel/Kconfig.freezer"
142 
143 menu "Platform selection"
144 
145 config ARCH_THUNDER
146         bool "Cavium Inc. Thunder SoC Family"
147         help
148           This enables support for Cavium's Thunder Family of SoCs.
149 
150 config ARCH_VEXPRESS
151         bool "ARMv8 software model (Versatile Express)"
152         select ARCH_REQUIRE_GPIOLIB
153         select COMMON_CLK_VERSATILE
154         select POWER_RESET_VEXPRESS
155         select VEXPRESS_CONFIG
156         help
157           This enables support for the ARMv8 software model (Versatile
158           Express).
159 
160 config ARCH_XGENE
161         bool "AppliedMicro X-Gene SOC Family"
162         help
163           This enables support for AppliedMicro X-Gene SOC Family
164 
165 endmenu
166 
167 menu "Bus support"
168 
169 config ARM_AMBA
170         bool
171 
172 config PCI
173         bool "PCI support"
174         help
175           This feature enables support for PCI bus system. If you say Y
176           here, the kernel will include drivers and infrastructure code
177           to support PCI bus devices.
178 
179 config PCI_DOMAINS
180         def_bool PCI
181 
182 config PCI_DOMAINS_GENERIC
183         def_bool PCI
184 
185 config PCI_SYSCALL
186         def_bool PCI
187 
188 source "drivers/pci/Kconfig"
189 source "drivers/pci/pcie/Kconfig"
190 source "drivers/pci/hotplug/Kconfig"
191 
192 endmenu
193 
194 menu "Kernel Features"
195 
196 choice
197         prompt "Page size"
198         default ARM64_4K_PAGES
199         help
200           Page size (translation granule) configuration.
201 
202 config ARM64_4K_PAGES
203         bool "4KB"
204         help
205           This feature enables 4KB pages support.
206 
207 config ARM64_64K_PAGES
208         bool "64KB"
209         help
210           This feature enables 64KB pages support (4KB by default)
211           allowing only two levels of page tables and faster TLB
212           look-up. AArch32 emulation is not available when this feature
213           is enabled.
214 
215 endchoice
216 
217 choice
218         prompt "Virtual address space size"
219         default ARM64_VA_BITS_39 if ARM64_4K_PAGES
220         default ARM64_VA_BITS_42 if ARM64_64K_PAGES
221         help
222           Allows choosing one of multiple possible virtual address
223           space sizes. The level of translation table is determined by
224           a combination of page size and virtual address space size.
225 
226 config ARM64_VA_BITS_39
227         bool "39-bit"
228         depends on ARM64_4K_PAGES
229 
230 config ARM64_VA_BITS_42
231         bool "42-bit"
232         depends on ARM64_64K_PAGES
233 
234 config ARM64_VA_BITS_48
235         bool "48-bit"
236         depends on !ARM_SMMU
237 
238 endchoice
239 
240 config ARM64_VA_BITS
241         int
242         default 39 if ARM64_VA_BITS_39
243         default 42 if ARM64_VA_BITS_42
244         default 48 if ARM64_VA_BITS_48
245 
246 config ARM64_PGTABLE_LEVELS
247         int
248         default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
249         default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
250         default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
251         default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
252 
253 config CPU_BIG_ENDIAN
254        bool "Build big-endian kernel"
255        help
256          Say Y if you plan on running a kernel in big-endian mode.
257 
258 config SMP
259         bool "Symmetric Multi-Processing"
260         help
261           This enables support for systems with more than one CPU.  If
262           you say N here, the kernel will run on single and
263           multiprocessor machines, but will use only one CPU of a
264           multiprocessor machine. If you say Y here, the kernel will run
265           on many, but not all, single processor machines. On a single
266           processor machine, the kernel will run faster if you say N
267           here.
268 
269           If you don't know what to do here, say N.
270 
271 config SCHED_MC
272         bool "Multi-core scheduler support"
273         depends on SMP
274         help
275           Multi-core scheduler support improves the CPU scheduler's decision
276           making when dealing with multi-core CPU chips at a cost of slightly
277           increased overhead in some places. If unsure say N here.
278 
279 config SCHED_SMT
280         bool "SMT scheduler support"
281         depends on SMP
282         help
283           Improves the CPU scheduler's decision making when dealing with
284           MultiThreading at a cost of slightly increased overhead in some
285           places. If unsure say N here.
286 
287 config NR_CPUS
288         int "Maximum number of CPUs (2-64)"
289         range 2 64
290         depends on SMP
291         # These have to remain sorted largest to smallest
292         default "64"
293 
294 config HOTPLUG_CPU
295         bool "Support for hot-pluggable CPUs"
296         depends on SMP
297         help
298           Say Y here to experiment with turning CPUs off and on.  CPUs
299           can be controlled through /sys/devices/system/cpu.
300 
301 source kernel/Kconfig.preempt
302 
303 config HZ
304         int
305         default 100
306 
307 config ARCH_HAS_HOLES_MEMORYMODEL
308         def_bool y if SPARSEMEM
309 
310 config ARCH_SPARSEMEM_ENABLE
311         def_bool y
312         select SPARSEMEM_VMEMMAP_ENABLE
313 
314 config ARCH_SPARSEMEM_DEFAULT
315         def_bool ARCH_SPARSEMEM_ENABLE
316 
317 config ARCH_SELECT_MEMORY_MODEL
318         def_bool ARCH_SPARSEMEM_ENABLE
319 
320 config HAVE_ARCH_PFN_VALID
321         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
322 
323 config HW_PERF_EVENTS
324         bool "Enable hardware performance counter support for perf events"
325         depends on PERF_EVENTS
326         default y
327         help
328           Enable hardware performance counter support for perf events. If
329           disabled, perf events will use software events only.
330 
331 config SYS_SUPPORTS_HUGETLBFS
332         def_bool y
333 
334 config ARCH_WANT_GENERAL_HUGETLB
335         def_bool y
336 
337 config ARCH_WANT_HUGE_PMD_SHARE
338         def_bool y if !ARM64_64K_PAGES
339 
340 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
341         def_bool y
342 
343 config ARCH_HAS_CACHE_LINE_SIZE
344         def_bool y
345 
346 source "mm/Kconfig"
347 
348 config XEN_DOM0
349         def_bool y
350         depends on XEN
351 
352 config XEN
353         bool "Xen guest support on ARM64"
354         depends on ARM64 && OF
355         select SWIOTLB_XEN
356         help
357           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
358 
359 config FORCE_MAX_ZONEORDER
360         int
361         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
362         default "11"
363 
364 endmenu
365 
366 menu "Boot options"
367 
368 config CMDLINE
369         string "Default kernel command string"
370         default ""
371         help
372           Provide a set of default command-line options at build time by
373           entering them here. As a minimum, you should specify the the
374           root device (e.g. root=/dev/nfs).
375 
376 config CMDLINE_FORCE
377         bool "Always use the default kernel command string"
378         help
379           Always use the default kernel command string, even if the boot
380           loader passes other arguments to the kernel.
381           This is useful if you cannot or don't want to change the
382           command-line options your boot loader passes to the kernel.
383 
384 config EFI_STUB
385         bool
386 
387 config EFI
388         bool "UEFI runtime support"
389         depends on OF && !CPU_BIG_ENDIAN
390         select LIBFDT
391         select UCS2_STRING
392         select EFI_PARAMS_FROM_FDT
393         select EFI_RUNTIME_WRAPPERS
394         select EFI_STUB
395         select EFI_ARMSTUB
396         default y
397         help
398           This option provides support for runtime services provided
399           by UEFI firmware (such as non-volatile variables, realtime
400           clock, and platform reset). A UEFI stub is also provided to
401           allow the kernel to be booted as an EFI application. This
402           is only useful on systems that have UEFI firmware.
403 
404 endmenu
405 
406 menu "Userspace binary formats"
407 
408 source "fs/Kconfig.binfmt"
409 
410 config COMPAT
411         bool "Kernel support for 32-bit EL0"
412         depends on !ARM64_64K_PAGES
413         select COMPAT_BINFMT_ELF
414         select HAVE_UID16
415         select OLD_SIGSUSPEND3
416         select COMPAT_OLD_SIGACTION
417         help
418           This option enables support for a 32-bit EL0 running under a 64-bit
419           kernel at EL1. AArch32-specific components such as system calls,
420           the user helper functions, VFP support and the ptrace interface are
421           handled appropriately by the kernel.
422 
423           If you want to execute 32-bit userspace applications, say Y.
424 
425 config SYSVIPC_COMPAT
426         def_bool y
427         depends on COMPAT && SYSVIPC
428 
429 endmenu
430 
431 menu "Power management options"
432 
433 source "kernel/power/Kconfig"
434 
435 config ARCH_SUSPEND_POSSIBLE
436         def_bool y
437 
438 config ARM64_CPU_SUSPEND
439         def_bool PM_SLEEP
440 
441 endmenu
442 
443 menu "CPU Power Management"
444 
445 source "drivers/cpuidle/Kconfig"
446 
447 source "drivers/cpufreq/Kconfig"
448 
449 endmenu
450 
451 source "net/Kconfig"
452 
453 source "drivers/Kconfig"
454 
455 source "drivers/firmware/Kconfig"
456 
457 source "fs/Kconfig"
458 
459 source "arch/arm64/kvm/Kconfig"
460 
461 source "arch/arm64/Kconfig.debug"
462 
463 source "security/Kconfig"
464 
465 source "crypto/Kconfig"
466 if CRYPTO
467 source "arch/arm64/crypto/Kconfig"
468 endif
469 
470 source "lib/Kconfig"

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