xref: /openbmc/linux/arch/parisc/Kconfig (revision ba61bb17)
1# SPDX-License-Identifier: GPL-2.0
2config PARISC
3	def_bool y
4	select ARCH_MIGHT_HAVE_PC_PARPORT
5	select HAVE_IDE
6	select HAVE_OPROFILE
7	select HAVE_FUNCTION_TRACER
8	select HAVE_FUNCTION_GRAPH_TRACER
9	select HAVE_SYSCALL_TRACEPOINTS
10	select ARCH_WANT_FRAME_POINTERS
11	select ARCH_HAS_ELF_RANDOMIZE
12	select ARCH_HAS_STRICT_KERNEL_RWX
13	select ARCH_HAS_UBSAN_SANITIZE_ALL
14	select ARCH_WANTS_UBSAN_NO_NULL
15	select ARCH_SUPPORTS_MEMORY_FAILURE
16	select RTC_CLASS
17	select RTC_DRV_GENERIC
18	select INIT_ALL_POSSIBLE
19	select HAVE_MEMBLOCK
20	select NO_BOOTMEM
21	select BUG
22	select BUILDTIME_EXTABLE_SORT
23	select HAVE_PERF_EVENTS
24	select HAVE_KERNEL_BZIP2
25	select HAVE_KERNEL_GZIP
26	select HAVE_KERNEL_LZ4
27	select HAVE_KERNEL_LZMA
28	select HAVE_KERNEL_LZO
29	select HAVE_KERNEL_XZ
30	select GENERIC_ATOMIC64 if !64BIT
31	select GENERIC_IRQ_PROBE
32	select GENERIC_PCI_IOMAP
33	select ARCH_HAVE_NMI_SAFE_CMPXCHG
34	select GENERIC_SMP_IDLE_THREAD
35	select GENERIC_CPU_DEVICES
36	select GENERIC_STRNCPY_FROM_USER
37	select SYSCTL_ARCH_UNALIGN_ALLOW
38	select SYSCTL_EXCEPTION_TRACE
39	select HAVE_MOD_ARCH_SPECIFIC
40	select VIRT_TO_BUS
41	select MODULES_USE_ELF_RELA
42	select CLONE_BACKWARDS
43	select TTY # Needed for pdc_cons.c
44	select HAVE_DEBUG_STACKOVERFLOW
45	select HAVE_ARCH_AUDITSYSCALL
46	select HAVE_ARCH_HASH
47	select HAVE_ARCH_SECCOMP_FILTER
48	select HAVE_ARCH_TRACEHOOK
49	select GENERIC_SCHED_CLOCK
50	select HAVE_UNSTABLE_SCHED_CLOCK if SMP
51	select GENERIC_CLOCKEVENTS
52	select ARCH_NO_COHERENT_DMA_MMAP
53	select CPU_NO_EFFICIENT_FFS
54	select NEED_DMA_MAP_STATE
55	select NEED_SG_DMA_LENGTH
56
57	help
58	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
59	  in many of their workstations & servers (HP9000 700 and 800 series,
60	  and later HP3000 series).  The PA-RISC Linux project home page is
61	  at <http://www.parisc-linux.org/>.
62
63config CPU_BIG_ENDIAN
64	def_bool y
65
66config MMU
67	def_bool y
68
69config STACK_GROWSUP
70	def_bool y
71
72config GENERIC_LOCKBREAK
73	bool
74	default y
75	depends on SMP && PREEMPT
76
77config RWSEM_GENERIC_SPINLOCK
78	def_bool y
79
80config RWSEM_XCHGADD_ALGORITHM
81	bool
82
83config ARCH_HAS_ILOG2_U32
84	bool
85	default n
86
87config ARCH_HAS_ILOG2_U64
88	bool
89	default n
90
91config GENERIC_BUG
92	bool
93	default y
94	depends on BUG
95
96config GENERIC_HWEIGHT
97	bool
98	default y
99
100config GENERIC_CALIBRATE_DELAY
101	bool
102	default y
103
104config TIME_LOW_RES
105	bool
106	depends on SMP
107	default y
108
109# unless you want to implement ACPI on PA-RISC ... ;-)
110config PM
111	bool
112
113config STACKTRACE_SUPPORT
114	def_bool y
115
116config ISA_DMA_API
117	bool
118
119config ARCH_MAY_HAVE_PC_FDC
120	bool
121	depends on BROKEN
122	default y
123
124config PGTABLE_LEVELS
125	int
126	default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
127	default 2
128
129config SYS_SUPPORTS_HUGETLBFS
130	def_bool y if PA20
131
132source "init/Kconfig"
133
134source "kernel/Kconfig.freezer"
135
136
137menu "Processor type and features"
138
139choice
140	prompt "Processor type"
141	default PA7000
142
143config PA7000
144	bool "PA7000/PA7100"
145	---help---
146	  This is the processor type of your CPU.  This information is
147	  used for optimizing purposes.  In order to compile a kernel
148	  that can run on all 32-bit PA CPUs (albeit not optimally fast),
149	  you can specify "PA7000" here.
150
151	  Specifying "PA8000" here will allow you to select a 64-bit kernel
152	  which is required on some machines.
153
154config PA7100LC
155	bool "PA7100LC"
156	help
157	  Select this option for the PCX-L processor, as used in the
158	  712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
159	  D200, D210, D300, D310 and E-class
160
161config PA7200
162	bool "PA7200"
163	help
164	  Select this option for the PCX-T' processor, as used in the
165	  C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
166	  K100, K200, K210, K220, K400, K410 and K420
167
168config PA7300LC
169	bool "PA7300LC"
170	help
171	  Select this option for the PCX-L2 processor, as used in the
172	  744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
173	  D220, D230, D320 and D330.
174
175config PA8X00
176	bool "PA8000 and up"
177	help
178	  Select this option for PCX-U to PCX-W2 processors.
179
180endchoice
181
182# Define implied options from the CPU selection here
183
184config PA20
185	def_bool y
186	depends on PA8X00
187
188config PA11
189	def_bool y
190	depends on PA7000 || PA7100LC || PA7200 || PA7300LC
191
192config PREFETCH
193	def_bool y
194	depends on PA8X00 || PA7200
195
196config MLONGCALLS
197	bool "Enable the -mlong-calls compiler option for big kernels"
198	def_bool y if (!MODULES)
199	depends on PA8X00
200	help
201	  If you configure the kernel to include many drivers built-in instead
202	  as modules, the kernel executable may become too big, so that the
203	  linker will not be able to resolve some long branches and fails to link
204	  your vmlinux kernel. In that case enabling this option will help you
205	  to overcome this limit by using the -mlong-calls compiler option.
206
207	  Usually you want to say N here, unless you e.g. want to build
208	  a kernel which includes all necessary drivers built-in and which can
209	  be used for TFTP booting without the need to have an initrd ramdisk.
210
211	  Enabling this option will probably slow down your kernel.
212
213config 64BIT
214	bool "64-bit kernel"
215	depends on PA8X00
216	help
217	  Enable this if you want to support 64bit kernel on PA-RISC platform.
218
219	  At the moment, only people willing to use more than 2GB of RAM,
220	  or having a 64bit-only capable PA-RISC machine should say Y here.
221
222	  Since there is no 64bit userland on PA-RISC, there is no point to
223	  enable this option otherwise. The 64bit kernel is significantly bigger
224	  and slower than the 32bit one.
225
226choice
227	prompt "Kernel page size"
228	default PARISC_PAGE_SIZE_4KB
229
230config PARISC_PAGE_SIZE_4KB
231	bool "4KB"
232	help
233	  This lets you select the page size of the kernel.  For best
234	  performance, a page size of 16KB is recommended.  For best
235	  compatibility with 32bit applications, a page size of 4KB should be
236	  selected (the vast majority of 32bit binaries work perfectly fine
237	  with a larger page size).
238
239	  4KB                For best 32bit compatibility
240	  16KB               For best performance
241	  64KB               For best performance, might give more overhead.
242
243	  If you don't know what to do, choose 4KB.
244
245config PARISC_PAGE_SIZE_16KB
246	bool "16KB"
247	depends on PA8X00 && BROKEN
248
249config PARISC_PAGE_SIZE_64KB
250	bool "64KB"
251	depends on PA8X00 && BROKEN
252
253endchoice
254
255config PARISC_SELF_EXTRACT
256	bool "Build kernel as self-extracting executable"
257	default y
258	help
259	  Say Y if you want to build the parisc kernel as a kind of
260	  self-extracting executable.
261
262	  If you say N here, the kernel will be compressed with gzip
263	  which can be loaded by the palo bootloader directly too.
264
265	  If you don't know what to do here, say Y.
266
267config SMP
268	bool "Symmetric multi-processing support"
269	---help---
270	  This enables support for systems with more than one CPU. If you have
271	  a system with only one CPU, say N. If you have a system with more
272	  than one CPU, say Y.
273
274	  If you say N here, the kernel will run on uni- and multiprocessor
275	  machines, but will use only one CPU of a multiprocessor machine.
276	  On a uniprocessor machine, the kernel will run faster if you say N.
277
278	  See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
279	  available at <http://www.tldp.org/docs.html#howto>.
280
281	  If you don't know what to do here, say N.
282
283config PARISC_CPU_TOPOLOGY
284	bool "Support cpu topology definition"
285	depends on SMP
286	default y
287	help
288	  Support PARISC cpu topology definition.
289
290config SCHED_MC
291	bool "Multi-core scheduler support"
292	depends on PARISC_CPU_TOPOLOGY && PA8X00
293	help
294	  Multi-core scheduler support improves the CPU scheduler's decision
295	  making when dealing with multi-core CPU chips at a cost of slightly
296	  increased overhead in some places. If unsure say N here.
297
298config IRQSTACKS
299	bool "Use separate kernel stacks when processing interrupts"
300	default y
301	help
302	  If you say Y here the kernel will use separate kernel stacks
303	  for handling hard and soft interrupts.  This can help avoid
304	  overflowing the process kernel stacks.
305
306config HOTPLUG_CPU
307	bool
308	default y if SMP
309
310config ARCH_SELECT_MEMORY_MODEL
311	def_bool y
312	depends on 64BIT
313
314config ARCH_DISCONTIGMEM_ENABLE
315	def_bool y
316	depends on 64BIT
317
318config ARCH_FLATMEM_ENABLE
319	def_bool y
320
321config ARCH_DISCONTIGMEM_DEFAULT
322	def_bool y
323	depends on ARCH_DISCONTIGMEM_ENABLE
324
325config NODES_SHIFT
326	int
327	default "3"
328	depends on NEED_MULTIPLE_NODES
329
330source "kernel/Kconfig.preempt"
331source "kernel/Kconfig.hz"
332source "mm/Kconfig"
333
334config COMPAT
335	def_bool y
336	depends on 64BIT
337	select COMPAT_BINFMT_ELF if BINFMT_ELF
338
339config SYSVIPC_COMPAT
340	def_bool y
341	depends on COMPAT && SYSVIPC
342
343config AUDIT_ARCH
344	def_bool y
345
346config NR_CPUS
347	int "Maximum number of CPUs (2-32)"
348	range 2 32
349	depends on SMP
350	default "4"
351
352endmenu
353
354
355source "drivers/parisc/Kconfig"
356
357
358menu "Executable file formats"
359
360source "fs/Kconfig.binfmt"
361
362endmenu
363
364source "net/Kconfig"
365
366source "drivers/Kconfig"
367
368source "fs/Kconfig"
369
370source "arch/parisc/Kconfig.debug"
371
372config SECCOMP
373	def_bool y
374	prompt "Enable seccomp to safely compute untrusted bytecode"
375	---help---
376	  This kernel feature is useful for number crunching applications
377	  that may need to compute untrusted bytecode during their
378	  execution. By using pipes or other transports made available to
379	  the process as file descriptors supporting the read/write
380	  syscalls, it's possible to isolate those applications in
381	  their own address space using seccomp. Once seccomp is
382	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
383	  and the task is only allowed to execute a few safe syscalls
384	  defined by each seccomp mode.
385
386	  If unsure, say Y. Only embedded should say N here.
387
388source "security/Kconfig"
389
390source "crypto/Kconfig"
391
392source "lib/Kconfig"
393