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Linux/arch/arm64/Kconfig

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

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