1config ARM64
2 def_bool y
3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
4 select ARCH_WANT_OPTIONAL_GPIOLIB
5 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
6 select ARCH_WANT_FRAME_POINTERS
7 select ARM_AMBA
8 select ARM_ARCH_TIMER
9 select ARM_GIC
10 select BUILDTIME_EXTABLE_SORT
11 select CLONE_BACKWARDS
12 select COMMON_CLK
13 select GENERIC_CLOCKEVENTS
14 select GENERIC_IOMAP
15 select GENERIC_IRQ_PROBE
16 select GENERIC_IRQ_SHOW
17 select GENERIC_SMP_IDLE_THREAD
18 select GENERIC_TIME_VSYSCALL
19 select HARDIRQS_SW_RESEND
20 select HAVE_ARCH_TRACEHOOK
21 select HAVE_DEBUG_BUGVERBOSE
22 select HAVE_DEBUG_KMEMLEAK
23 select HAVE_DMA_API_DEBUG
24 select HAVE_DMA_ATTRS
25 select HAVE_GENERIC_DMA_COHERENT
26 select HAVE_GENERIC_HARDIRQS
27 select HAVE_HW_BREAKPOINT if PERF_EVENTS
28 select HAVE_MEMBLOCK
29 select HAVE_PERF_EVENTS
30 select IRQ_DOMAIN
31 select MODULES_USE_ELF_RELA
32 select NO_BOOTMEM
33 select OF
34 select OF_EARLY_FLATTREE
35 select PERF_USE_VMALLOC
36 select POWER_RESET
37 select POWER_SUPPLY
38 select RTC_LIB
39 select SPARSE_IRQ
40 select SYSCTL_EXCEPTION_TRACE
41 help
42 ARM 64-bit (AArch64) Linux support.
43
44config 64BIT
45 def_bool y
46
47config ARCH_PHYS_ADDR_T_64BIT
48 def_bool y
49
50config MMU
51 def_bool y
52
53config NO_IOPORT
54 def_bool y
55
56config STACKTRACE_SUPPORT
57 def_bool y
58
59config LOCKDEP_SUPPORT
60 def_bool y
61
62config TRACE_IRQFLAGS_SUPPORT
63 def_bool y
64
65config GENERIC_LOCKBREAK
66 def_bool y
67 depends on SMP && PREEMPT
68
69config RWSEM_GENERIC_SPINLOCK
70 def_bool y
71
72config GENERIC_HWEIGHT
73 def_bool y
74
75config GENERIC_CSUM
76 def_bool y
77
78config GENERIC_CALIBRATE_DELAY
79 def_bool y
80
81config ZONE_DMA32
82 def_bool y
83
84config ARCH_DMA_ADDR_T_64BIT
85 def_bool y
86
87config NEED_DMA_MAP_STATE
88 def_bool y
89
90config NEED_SG_DMA_LENGTH
91 def_bool y
92
93config SWIOTLB
94 def_bool y
95
96config IOMMU_HELPER
97 def_bool SWIOTLB
98
99source "init/Kconfig"
100
101source "kernel/Kconfig.freezer"
102
103menu "Platform selection"
104
105config ARCH_VEXPRESS
106 bool "ARMv8 software model (Versatile Express)"
107 select ARCH_REQUIRE_GPIOLIB
108 select COMMON_CLK_VERSATILE
109 select POWER_RESET_VEXPRESS
110 select VEXPRESS_CONFIG
111 help
112 This enables support for the ARMv8 software model (Versatile
113 Express).
114
115config ARCH_XGENE
116 bool "AppliedMicro X-Gene SOC Family"
117 help
118 This enables support for AppliedMicro X-Gene SOC Family
119
120endmenu
121
122menu "Bus support"
123
124config ARM_AMBA
125 bool
126
127endmenu
128
129menu "Kernel Features"
130
131config ARM64_64K_PAGES
132 bool "Enable 64KB pages support"
133 help
134 This feature enables 64KB pages support (4KB by default)
135 allowing only two levels of page tables and faster TLB
136 look-up. AArch32 emulation is not available when this feature
137 is enabled.
138
139config SMP
140 bool "Symmetric Multi-Processing"
141 select USE_GENERIC_SMP_HELPERS
142 help
143 This enables support for systems with more than one CPU. If
144 you say N here, the kernel will run on single and
145 multiprocessor machines, but will use only one CPU of a
146 multiprocessor machine. If you say Y here, the kernel will run
147 on many, but not all, single processor machines. On a single
148 processor machine, the kernel will run faster if you say N
149 here.
150
151 If you don't know what to do here, say N.
152
153config NR_CPUS
154 int "Maximum number of CPUs (2-32)"
155 range 2 32
156 depends on SMP
157
158 default "8" if ARCH_XGENE
159 default "4"
160
161source kernel/Kconfig.preempt
162
163config HZ
164 int
165 default 100
166
167config ARCH_HAS_HOLES_MEMORYMODEL
168 def_bool y if SPARSEMEM
169
170config ARCH_SPARSEMEM_ENABLE
171 def_bool y
172 select SPARSEMEM_VMEMMAP_ENABLE
173
174config ARCH_SPARSEMEM_DEFAULT
175 def_bool ARCH_SPARSEMEM_ENABLE
176
177config ARCH_SELECT_MEMORY_MODEL
178 def_bool ARCH_SPARSEMEM_ENABLE
179
180config HAVE_ARCH_PFN_VALID
181 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
182
183config HW_PERF_EVENTS
184 bool "Enable hardware performance counter support for perf events"
185 depends on PERF_EVENTS
186 default y
187 help
188 Enable hardware performance counter support for perf events. If
189 disabled, perf events will use software events only.
190
191config SYS_SUPPORTS_HUGETLBFS
192 def_bool y
193
194config ARCH_WANT_GENERAL_HUGETLB
195 def_bool y
196
197config ARCH_WANT_HUGE_PMD_SHARE
198 def_bool y if !ARM64_64K_PAGES
199
200config HAVE_ARCH_TRANSPARENT_HUGEPAGE
201 def_bool y
202
203source "mm/Kconfig"
204
205config XEN_DOM0
206 def_bool y
207 depends on XEN
208
209config XEN
210 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
211 depends on ARM64 && OF
212 help
213 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
214
215config FORCE_MAX_ZONEORDER
216 int
217 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
218 default "11"
219
220endmenu
221
222menu "Boot options"
223
224config CMDLINE
225 string "Default kernel command string"
226 default ""
227 help
228 Provide a set of default command-line options at build time by
229 entering them here. As a minimum, you should specify the the
230 root device (e.g. root=/dev/nfs).
231
232config CMDLINE_FORCE
233 bool "Always use the default kernel command string"
234 help
235 Always use the default kernel command string, even if the boot
236 loader passes other arguments to the kernel.
237 This is useful if you cannot or don't want to change the
238 command-line options your boot loader passes to the kernel.
239
240endmenu
241
242menu "Userspace binary formats"
243
244source "fs/Kconfig.binfmt"
245
246config COMPAT
247 bool "Kernel support for 32-bit EL0"
248 depends on !ARM64_64K_PAGES
249 select COMPAT_BINFMT_ELF
250 select HAVE_UID16
251 select OLD_SIGSUSPEND3
252 select COMPAT_OLD_SIGACTION
253 help
254 This option enables support for a 32-bit EL0 running under a 64-bit
255 kernel at EL1. AArch32-specific components such as system calls,
256 the user helper functions, VFP support and the ptrace interface are
257 handled appropriately by the kernel.
258
259 If you want to execute 32-bit userspace applications, say Y.
260
261config SYSVIPC_COMPAT
262 def_bool y
263 depends on COMPAT && SYSVIPC
264
265endmenu
266
267source "net/Kconfig"
268
269source "drivers/Kconfig"
270
271source "fs/Kconfig"
272
273source "arch/arm64/kvm/Kconfig"
274
275source "arch/arm64/Kconfig.debug"
276
277source "security/Kconfig"
278
279source "crypto/Kconfig"
280
281source "lib/Kconfig"
282
