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xtensa: add seccomp, getrandom, and memfd_create syscalls
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66701b14 1config ZONE_DMA
35f9cd08 2 def_bool y
66701b14 3
8e1a6dd2 4config XTENSA
35f9cd08 5 def_bool y
8f371c75 6 select ARCH_WANT_FRAME_POINTERS
e969161b 7 select ARCH_WANT_IPC_PARSE_VERSION
6ed65f37 8 select ARCH_WANT_OPTIONAL_GPIOLIB
25df8198 9 select BUILDTIME_EXTABLE_SORT
3e41f9ba 10 select CLONE_BACKWARDS
920f8a39
MF
11 select COMMON_CLK
12 select GENERIC_ATOMIC64
13 select GENERIC_CLOCKEVENTS
14 select GENERIC_IRQ_SHOW
15 select GENERIC_PCI_IOMAP
16 select GENERIC_SCHED_CLOCK
478ba61a 17 select HAVE_FUNCTION_TRACER
496543c4 18 select HAVE_IRQ_TIME_ACCOUNTING
920f8a39 19 select HAVE_OPROFILE
a6f3eefa 20 select HAVE_PERF_EVENTS
920f8a39
MF
21 select IRQ_DOMAIN
22 select MODULES_USE_ELF_RELA
23 select VIRT_TO_BUS
8e1a6dd2
CZ
24 help
25 Xtensa processors are 32-bit RISC machines designed by Tensilica
26 primarily for embedded systems. These processors are both
27 configurable and extensible. The Linux port to the Xtensa
28 architecture supports all processor configurations and extensions,
29 with reasonable minimum requirements. The Xtensa Linux project has
0ada4490 30 a home page at <http://www.linux-xtensa.org/>.
8e1a6dd2 31
8e1a6dd2 32config RWSEM_XCHGADD_ALGORITHM
35f9cd08 33 def_bool y
8e1a6dd2 34
d4337aa5 35config GENERIC_HWEIGHT
35f9cd08 36 def_bool y
d4337aa5 37
f0d1b0b3 38config ARCH_HAS_ILOG2_U32
35f9cd08 39 def_bool n
f0d1b0b3
DH
40
41config ARCH_HAS_ILOG2_U64
35f9cd08 42 def_bool n
f0d1b0b3 43
ce816fa8 44config NO_IOPORT_MAP
d046f77e 45 def_bool n
5ea81769 46
bdc80787
PA
47config HZ
48 int
49 default 100
50
8e1a6dd2 51source "init/Kconfig"
dc52ddc0 52source "kernel/Kconfig.freezer"
8e1a6dd2 53
8f371c75
MF
54config LOCKDEP_SUPPORT
55 def_bool y
56
3e4196a5
MF
57config STACKTRACE_SUPPORT
58 def_bool y
59
c92931b2
MF
60config TRACE_IRQFLAGS_SUPPORT
61 def_bool y
62
35f9cd08 63config MMU
420ae951
MF
64 bool
65 default n if !XTENSA_VARIANT_CUSTOM
66 default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM
35f9cd08 67
4c0d2141
JW
68config VARIANT_IRQ_SWITCH
69 def_bool n
70
a1a2bdec
BS
71config HAVE_XTENSA_GPIO32
72 def_bool n
73
f615136c
MF
74config MAY_HAVE_SMP
75 def_bool n
76
8e1a6dd2
CZ
77menu "Processor type and features"
78
79choice
80 prompt "Xtensa Processor Configuration"
173d6681 81 default XTENSA_VARIANT_FSF
8e1a6dd2 82
173d6681 83config XTENSA_VARIANT_FSF
0025427e 84 bool "fsf - default (not generic) configuration"
35f9cd08 85 select MMU
0025427e
CZ
86
87config XTENSA_VARIANT_DC232B
88 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
35f9cd08 89 select MMU
a1a2bdec 90 select HAVE_XTENSA_GPIO32
0025427e 91 help
35f9cd08 92 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
000af2c5 93
d0b73b48
PD
94config XTENSA_VARIANT_DC233C
95 bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
96 select MMU
a1a2bdec 97 select HAVE_XTENSA_GPIO32
d0b73b48
PD
98 help
99 This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
100
000af2c5
JW
101config XTENSA_VARIANT_S6000
102 bool "s6000 - Stretch software configurable processor"
103 select VARIANT_IRQ_SWITCH
104 select ARCH_REQUIRE_GPIOLIB
b070a03f 105 select XTENSA_CALIBRATE_CCOUNT
420ae951
MF
106
107config XTENSA_VARIANT_CUSTOM
108 bool "Custom Xtensa processor configuration"
109 select MAY_HAVE_SMP
110 select HAVE_XTENSA_GPIO32
111 help
112 Select this variant to use a custom Xtensa processor configuration.
113 You will be prompted for a processor variant CORENAME.
8e1a6dd2
CZ
114endchoice
115
420ae951
MF
116config XTENSA_VARIANT_CUSTOM_NAME
117 string "Xtensa Processor Custom Core Variant Name"
118 depends on XTENSA_VARIANT_CUSTOM
119 help
120 Provide the name of a custom Xtensa processor variant.
121 This CORENAME selects arch/xtensa/variant/CORENAME.
122 Dont forget you have to select MMU if you have one.
123
124config XTENSA_VARIANT_NAME
125 string
126 default "dc232b" if XTENSA_VARIANT_DC232B
127 default "dc233c" if XTENSA_VARIANT_DC233C
128 default "fsf" if XTENSA_VARIANT_FSF
129 default "s6000" if XTENSA_VARIANT_S6000
130 default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM
131
132config XTENSA_VARIANT_MMU
133 bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
134 depends on XTENSA_VARIANT_CUSTOM
135 default y
136 help
137 Build a Conventional Kernel with full MMU support,
138 ie: it supports a TLB with auto-loading, page protection.
139
8e1a6dd2
CZ
140config XTENSA_UNALIGNED_USER
141 bool "Unaligned memory access in use space"
35f9cd08
JW
142 help
143 The Xtensa architecture currently does not handle unaligned
144 memory accesses in hardware but through an exception handler.
145 Per default, unaligned memory accesses are disabled in user space.
8e1a6dd2 146
35f9cd08 147 Say Y here to enable unaligned memory access in user space.
8e1a6dd2 148
bd96efe1 149source "kernel/Kconfig.preempt"
8e1a6dd2 150
f615136c
MF
151config HAVE_SMP
152 bool "System Supports SMP (MX)"
153 depends on MAY_HAVE_SMP
154 select XTENSA_MX
155 help
156 This option is use to indicate that the system-on-a-chip (SOC)
157 supports Multiprocessing. Multiprocessor support implemented above
158 the CPU core definition and currently needs to be selected manually.
159
160 Multiprocessor support in implemented with external cache and
161 interrupt controlers.
162
163 The MX interrupt distributer adds Interprocessor Interrupts
164 and causes the IRQ numbers to be increased by 4 for devices
165 like the open cores ethernet driver and the serial interface.
166
167 You still have to select "Enable SMP" to enable SMP on this SOC.
168
169config SMP
170 bool "Enable Symmetric multi-processing support"
171 depends on HAVE_SMP
f615136c
MF
172 select GENERIC_SMP_IDLE_THREAD
173 help
174 Enabled SMP Software; allows more than one CPU/CORE
175 to be activated during startup.
176
177config NR_CPUS
178 depends on SMP
179 int "Maximum number of CPUs (2-32)"
180 range 2 32
181 default "4"
182
49b424fe
MF
183config HOTPLUG_CPU
184 bool "Enable CPU hotplug support"
185 depends on SMP
186 help
187 Say Y here to allow turning CPUs off and on. CPUs can be
188 controlled through /sys/devices/system/cpu.
189
190 Say N if you want to disable CPU hotplug.
191
e85e335f
MF
192config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
193 bool "Initialize Xtensa MMU inside the Linux kernel code"
8a9de059 194 depends on MMU
e85e335f
MF
195 default y
196 help
197 Earlier version initialized the MMU in the exception vector
198 before jumping to _startup in head.S and had an advantage that
199 it was possible to place a software breakpoint at 'reset' and
200 then enter your normal kernel breakpoints once the MMU was mapped
201 to the kernel mappings (0XC0000000).
202
203 This unfortunately doesn't work for U-Boot and likley also wont
204 work for using KEXEC to have a hot kernel ready for doing a
205 KDUMP.
206
207 So now the MMU is initialized in head.S but it's necessary to
208 use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.
209 xt-gdb can't place a Software Breakpoint in the 0XD region prior
210 to mapping the MMU and after mapping even if the area of low memory
211 was mapped gdb wouldn't remove the breakpoint on hitting it as the
212 PC wouldn't match. Since Hardware Breakpoints are recommended for
213 Linux configurations it seems reasonable to just assume they exist
214 and leave this older mechanism for unfortunate souls that choose
215 not to follow Tensilica's recommendation.
216
217 Selecting this will cause U-Boot to set the KERNEL Load and Entry
218 address at 0x00003000 instead of the mapped std of 0xD0003000.
219
220 If in doubt, say Y.
221
65559100
MF
222config HIGHMEM
223 bool "High Memory Support"
8a9de059 224 depends on MMU
65559100
MF
225 help
226 Linux can use the full amount of RAM in the system by
227 default. However, the default MMUv2 setup only maps the
228 lowermost 128 MB of memory linearly to the areas starting
229 at 0xd0000000 (cached) and 0xd8000000 (uncached).
230 When there are more than 128 MB memory in the system not
231 all of it can be "permanently mapped" by the kernel.
232 The physical memory that's not permanently mapped is called
233 "high memory".
234
235 If you are compiling a kernel which will never run on a
236 machine with more than 128 MB total physical RAM, answer
237 N here.
238
239 If unsure, say Y.
240
9184289c
MF
241config FAST_SYSCALL_XTENSA
242 bool "Enable fast atomic syscalls"
243 default n
244 help
245 fast_syscall_xtensa is a syscall that can make atomic operations
246 on UP kernel when processor has no s32c1i support.
247
248 This syscall is deprecated. It may have issues when called with
249 invalid arguments. It is provided only for backwards compatibility.
250 Only enable it if your userspace software requires it.
251
252 If unsure, say N.
253
254config FAST_SYSCALL_SPILL_REGISTERS
255 bool "Enable spill registers syscall"
256 default n
257 help
258 fast_syscall_spill_registers is a syscall that spills all active
259 register windows of a calling userspace task onto its stack.
260
261 This syscall is deprecated. It may have issues when called with
262 invalid arguments. It is provided only for backwards compatibility.
263 Only enable it if your userspace software requires it.
264
265 If unsure, say N.
266
8e1a6dd2
CZ
267endmenu
268
35f9cd08
JW
269config XTENSA_CALIBRATE_CCOUNT
270 def_bool n
271 help
272 On some platforms (XT2000, for example), the CPU clock rate can
273 vary. The frequency can be determined, however, by measuring
274 against a well known, fixed frequency, such as an UART oscillator.
275
276config SERIAL_CONSOLE
277 def_bool n
278
35f9cd08
JW
279menu "Bus options"
280
281config PCI
282 bool "PCI support"
283 default y
284 help
285 Find out whether you have a PCI motherboard. PCI is the name of a
286 bus system, i.e. the way the CPU talks to the other stuff inside
287 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
288 VESA. If you have PCI, say Y, otherwise N.
289
290source "drivers/pci/Kconfig"
291
35e71f90
CZ
292endmenu
293
8e1a6dd2
CZ
294menu "Platform options"
295
296choice
297 prompt "Xtensa System Type"
298 default XTENSA_PLATFORM_ISS
299
300config XTENSA_PLATFORM_ISS
301 bool "ISS"
35f9cd08
JW
302 select XTENSA_CALIBRATE_CCOUNT
303 select SERIAL_CONSOLE
8e1a6dd2
CZ
304 help
305 ISS is an acronym for Tensilica's Instruction Set Simulator.
306
307config XTENSA_PLATFORM_XT2000
308 bool "XT2000"
4964527d 309 select HAVE_IDE
8e1a6dd2
CZ
310 help
311 XT2000 is the name of Tensilica's feature-rich emulation platform.
312 This hardware is capable of running a full Linux distribution.
313
f82e939f
JW
314config XTENSA_PLATFORM_S6105
315 bool "S6105"
4964527d 316 select HAVE_IDE
f82e939f 317 select SERIAL_CONSOLE
ce816fa8 318 select NO_IOPORT_MAP
f82e939f 319
0d456bad
MF
320config XTENSA_PLATFORM_XTFPGA
321 bool "XTFPGA"
322 select SERIAL_CONSOLE
323 select ETHOC
324 select XTENSA_CALIBRATE_CCOUNT
325 help
326 XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
327 This hardware is capable of running a full Linux distribution.
328
8e1a6dd2
CZ
329endchoice
330
331
8e1a6dd2
CZ
332config XTENSA_CPU_CLOCK
333 int "CPU clock rate [MHz]"
334 depends on !XTENSA_CALIBRATE_CCOUNT
35f9cd08 335 default 16
8e1a6dd2
CZ
336
337config GENERIC_CALIBRATE_DELAY
338 bool "Auto calibration of the BogoMIPS value"
35f9cd08 339 help
82300bf4 340 The BogoMIPS value can easily be derived from the CPU frequency.
8e1a6dd2
CZ
341
342config CMDLINE_BOOL
343 bool "Default bootloader kernel arguments"
344
345config CMDLINE
346 string "Initial kernel command string"
347 depends on CMDLINE_BOOL
348 default "console=ttyS0,38400 root=/dev/ram"
349 help
350 On some architectures (EBSA110 and CATS), there is currently no way
351 for the boot loader to pass arguments to the kernel. For these
352 architectures, you should supply some command-line options at build
353 time by entering them here. As a minimum, you should specify the
354 memory size and the root device (e.g., mem=64M root=/dev/nfs).
355
da844a81
MF
356config USE_OF
357 bool "Flattened Device Tree support"
358 select OF
359 select OF_EARLY_FLATTREE
360 help
361 Include support for flattened device tree machine descriptions.
362
363config BUILTIN_DTB
364 string "DTB to build into the kernel image"
365 depends on OF
366
b6c7e873
VP
367config BLK_DEV_SIMDISK
368 tristate "Host file-based simulated block device support"
369 default n
7a0684cd 370 depends on XTENSA_PLATFORM_ISS && BLOCK
b6c7e873
VP
371 help
372 Create block devices that map to files in the host file system.
373 Device binding to host file may be changed at runtime via proc
374 interface provided the device is not in use.
375
376config BLK_DEV_SIMDISK_COUNT
377 int "Number of host file-based simulated block devices"
378 range 1 10
379 depends on BLK_DEV_SIMDISK
380 default 2
381 help
382 This is the default minimal number of created block devices.
383 Kernel/module parameter 'simdisk_count' may be used to change this
384 value at runtime. More file names (but no more than 10) may be
385 specified as parameters, simdisk_count grows accordingly.
386
387config SIMDISK0_FILENAME
388 string "Host filename for the first simulated device"
389 depends on BLK_DEV_SIMDISK = y
390 default ""
391 help
392 Attach a first simdisk to a host file. Conventionally, this file
393 contains a root file system.
394
395config SIMDISK1_FILENAME
396 string "Host filename for the second simulated device"
397 depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
398 default ""
399 help
400 Another simulated disk in a host file for a buildroot-independent
401 storage.
402
82300bf4
CZ
403source "mm/Kconfig"
404
8e1a6dd2
CZ
405source "drivers/pcmcia/Kconfig"
406
407source "drivers/pci/hotplug/Kconfig"
408
409endmenu
410
cab00891 411menu "Executable file formats"
8e1a6dd2 412
8e1a6dd2
CZ
413source "fs/Kconfig.binfmt"
414
415endmenu
416
d5950b43
SR
417source "net/Kconfig"
418
8e1a6dd2
CZ
419source "drivers/Kconfig"
420
421source "fs/Kconfig"
422
8e1a6dd2
CZ
423source "arch/xtensa/Kconfig.debug"
424
425source "security/Kconfig"
426
427source "crypto/Kconfig"
428
429source "lib/Kconfig"
430
431