xref: /openbmc/linux/arch/parisc/Kconfig (revision ee7da21a)
1# SPDX-License-Identifier: GPL-2.0
2config PARISC
3	def_bool y
4	select ARCH_32BIT_OFF_T if !64BIT
5	select ARCH_MIGHT_HAVE_PC_PARPORT
6	select HAVE_FUNCTION_TRACER
7	select HAVE_FUNCTION_GRAPH_TRACER
8	select HAVE_SYSCALL_TRACEPOINTS
9	select ARCH_WANT_FRAME_POINTERS
10	select ARCH_HAS_ELF_RANDOMIZE
11	select ARCH_HAS_STRICT_KERNEL_RWX
12	select ARCH_HAS_UBSAN_SANITIZE_ALL
13	select ARCH_NO_SG_CHAIN
14	select ARCH_SUPPORTS_HUGETLBFS if PA20
15	select ARCH_SUPPORTS_MEMORY_FAILURE
16	select DMA_OPS
17	select RTC_CLASS
18	select RTC_DRV_GENERIC
19	select INIT_ALL_POSSIBLE
20	select BUG
21	select BUILDTIME_TABLE_SORT
22	select HAVE_PCI
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 GENERIC_LIB_DEVMEM_IS_ALLOWED
38	select SYSCTL_ARCH_UNALIGN_ALLOW
39	select SYSCTL_EXCEPTION_TRACE
40	select HAVE_MOD_ARCH_SPECIFIC
41	select VIRT_TO_BUS
42	select MODULES_USE_ELF_RELA
43	select CLONE_BACKWARDS
44	select TTY # Needed for pdc_cons.c
45	select HAVE_DEBUG_STACKOVERFLOW
46	select HAVE_ARCH_AUDITSYSCALL
47	select HAVE_ARCH_HASH
48	select HAVE_ARCH_JUMP_LABEL
49	select HAVE_ARCH_JUMP_LABEL_RELATIVE
50	select HAVE_ARCH_SECCOMP_FILTER
51	select HAVE_ARCH_TRACEHOOK
52	select HAVE_REGS_AND_STACK_ACCESS_API
53	select GENERIC_SCHED_CLOCK
54	select HAVE_UNSTABLE_SCHED_CLOCK if SMP
55	select LEGACY_TIMER_TICK
56	select CPU_NO_EFFICIENT_FFS
57	select NEED_DMA_MAP_STATE
58	select NEED_SG_DMA_LENGTH
59	select HAVE_ARCH_KGDB
60	select HAVE_KPROBES
61	select HAVE_KRETPROBES
62	select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
63	select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
64	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
65	select HAVE_KPROBES_ON_FTRACE
66	select HAVE_DYNAMIC_FTRACE_WITH_REGS
67	select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
68	select SET_FS
69
70	help
71	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
72	  in many of their workstations & servers (HP9000 700 and 800 series,
73	  and later HP3000 series).  The PA-RISC Linux project home page is
74	  at <https://parisc.wiki.kernel.org>.
75
76config CPU_BIG_ENDIAN
77	def_bool y
78
79config MMU
80	def_bool y
81
82config STACK_GROWSUP
83	def_bool y
84
85config ARCH_DEFCONFIG
86	string
87	default "arch/parisc/configs/generic-32bit_defconfig" if !64BIT
88	default "arch/parisc/configs/generic-64bit_defconfig" if 64BIT
89
90config GENERIC_LOCKBREAK
91	bool
92	default y
93	depends on SMP && PREEMPTION
94
95config ARCH_HAS_ILOG2_U32
96	bool
97	default n
98
99config ARCH_HAS_ILOG2_U64
100	bool
101	default n
102
103config GENERIC_BUG
104	bool
105	default y
106	depends on BUG
107
108config GENERIC_HWEIGHT
109	bool
110	default y
111
112config GENERIC_CALIBRATE_DELAY
113	bool
114	default y
115
116config TIME_LOW_RES
117	bool
118	depends on SMP
119	default y
120
121# unless you want to implement ACPI on PA-RISC ... ;-)
122config PM
123	bool
124
125config STACKTRACE_SUPPORT
126	def_bool y
127
128config ISA_DMA_API
129	bool
130
131config ARCH_MAY_HAVE_PC_FDC
132	bool
133	depends on BROKEN
134	default y
135
136config PGTABLE_LEVELS
137	int
138	default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
139	default 2
140
141menu "Processor type and features"
142
143choice
144	prompt "Processor type"
145	default PA7000
146
147config PA7000
148	bool "PA7000/PA7100"
149	help
150	  This is the processor type of your CPU.  This information is
151	  used for optimizing purposes.  In order to compile a kernel
152	  that can run on all 32-bit PA CPUs (albeit not optimally fast),
153	  you can specify "PA7000" here.
154
155	  Specifying "PA8000" here will allow you to select a 64-bit kernel
156	  which is required on some machines.
157
158config PA7100LC
159	bool "PA7100LC"
160	help
161	  Select this option for the PCX-L processor, as used in the
162	  712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
163	  D200, D210, D300, D310 and E-class
164
165config PA7200
166	bool "PA7200"
167	help
168	  Select this option for the PCX-T' processor, as used in the
169	  C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
170	  K100, K200, K210, K220, K400, K410 and K420
171
172config PA7300LC
173	bool "PA7300LC"
174	help
175	  Select this option for the PCX-L2 processor, as used in the
176	  744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
177	  D220, D230, D320 and D330.
178
179config PA8X00
180	bool "PA8000 and up"
181	help
182	  Select this option for PCX-U to PCX-W2 processors.
183
184endchoice
185
186# Define implied options from the CPU selection here
187
188config PA20
189	def_bool y
190	depends on PA8X00
191
192config PA11
193	def_bool y
194	depends on PA7000 || PA7100LC || PA7200 || PA7300LC
195	select ARCH_HAS_SYNC_DMA_FOR_CPU
196	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
197
198config PREFETCH
199	def_bool y
200	depends on PA8X00 || PA7200
201
202config PARISC_HUGE_KERNEL
203	def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
204
205config MLONGCALLS
206	def_bool y if PARISC_HUGE_KERNEL
207	bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
208	depends on PA8X00
209	help
210	  If you configure the kernel to include many drivers built-in instead
211	  as modules, the kernel executable may become too big, so that the
212	  linker will not be able to resolve some long branches and fails to link
213	  your vmlinux kernel. In that case enabling this option will help you
214	  to overcome this limit by using the -mlong-calls compiler option.
215
216	  Usually you want to say N here, unless you e.g. want to build
217	  a kernel which includes all necessary drivers built-in and which can
218	  be used for TFTP booting without the need to have an initrd ramdisk.
219
220	  Enabling this option will probably slow down your kernel.
221
222config 64BIT
223	bool "64-bit kernel"
224	depends on PA8X00
225	help
226	  Enable this if you want to support 64bit kernel on PA-RISC platform.
227
228	  At the moment, only people willing to use more than 2GB of RAM,
229	  or having a 64bit-only capable PA-RISC machine should say Y here.
230
231	  Since there is no 64bit userland on PA-RISC, there is no point to
232	  enable this option otherwise. The 64bit kernel is significantly bigger
233	  and slower than the 32bit one.
234
235choice
236	prompt "Kernel page size"
237	default PARISC_PAGE_SIZE_4KB
238
239config PARISC_PAGE_SIZE_4KB
240	bool "4KB"
241	help
242	  This lets you select the page size of the kernel.  For best
243	  performance, a page size of 16KB is recommended.  For best
244	  compatibility with 32bit applications, a page size of 4KB should be
245	  selected (the vast majority of 32bit binaries work perfectly fine
246	  with a larger page size).
247
248	  4KB                For best 32bit compatibility
249	  16KB               For best performance
250	  64KB               For best performance, might give more overhead.
251
252	  If you don't know what to do, choose 4KB.
253
254config PARISC_PAGE_SIZE_16KB
255	bool "16KB"
256	depends on PA8X00 && BROKEN
257
258config PARISC_PAGE_SIZE_64KB
259	bool "64KB"
260	depends on PA8X00 && BROKEN
261
262endchoice
263
264config PARISC_SELF_EXTRACT
265	bool "Build kernel as self-extracting executable"
266	default y
267	help
268	  Say Y if you want to build the parisc kernel as a kind of
269	  self-extracting executable.
270
271	  If you say N here, the kernel will be compressed with gzip
272	  which can be loaded by the palo bootloader directly too.
273
274	  If you don't know what to do here, say Y.
275
276config SMP
277	bool "Symmetric multi-processing support"
278	help
279	  This enables support for systems with more than one CPU. If you have
280	  a system with only one CPU, say N. If you have a system with more
281	  than one CPU, say Y.
282
283	  If you say N here, the kernel will run on uni- and multiprocessor
284	  machines, but will use only one CPU of a multiprocessor machine.
285	  On a uniprocessor machine, the kernel will run faster if you say N.
286
287	  See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
288	  available at <https://www.tldp.org/docs.html#howto>.
289
290	  If you don't know what to do here, say N.
291
292config PARISC_CPU_TOPOLOGY
293	bool "Support cpu topology definition"
294	depends on SMP
295	default y
296	help
297	  Support PARISC cpu topology definition.
298
299config SCHED_MC
300	bool "Multi-core scheduler support"
301	depends on PARISC_CPU_TOPOLOGY && PA8X00
302	help
303	  Multi-core scheduler support improves the CPU scheduler's decision
304	  making when dealing with multi-core CPU chips at a cost of slightly
305	  increased overhead in some places. If unsure say N here.
306
307config IRQSTACKS
308	bool "Use separate kernel stacks when processing interrupts"
309	default y
310	help
311	  If you say Y here the kernel will use separate kernel stacks
312	  for handling hard and soft interrupts.  This can help avoid
313	  overflowing the process kernel stacks.
314
315config TLB_PTLOCK
316	bool "Use page table locks in TLB fault handler"
317	depends on SMP
318	default n
319	help
320	  Select this option to enable page table locking in the TLB
321	  fault handler. This ensures that page table entries are
322	  updated consistently on SMP machines at the expense of some
323	  loss in performance.
324
325config HOTPLUG_CPU
326	bool
327	default y if SMP
328
329config ARCH_SELECT_MEMORY_MODEL
330	def_bool y
331	depends on 64BIT
332
333config ARCH_SPARSEMEM_ENABLE
334	def_bool y
335	depends on 64BIT
336
337config ARCH_FLATMEM_ENABLE
338	def_bool y
339
340config ARCH_SPARSEMEM_DEFAULT
341	def_bool y
342	depends on ARCH_SPARSEMEM_ENABLE
343
344source "kernel/Kconfig.hz"
345
346config COMPAT
347	def_bool y
348	depends on 64BIT
349
350config SYSVIPC_COMPAT
351	def_bool y
352	depends on COMPAT && SYSVIPC
353
354config AUDIT_ARCH
355	def_bool y
356
357config NR_CPUS
358	int "Maximum number of CPUs (2-32)"
359	range 2 32
360	depends on SMP
361	default "4"
362
363config KEXEC
364	bool "Kexec system call"
365	select KEXEC_CORE
366	help
367	  kexec is a system call that implements the ability to shutdown your
368	  current kernel, and to start another kernel.  It is like a reboot
369	  but it is independent of the system firmware.   And like a reboot
370	  you can start any kernel with it, not just Linux.
371
372	  It is an ongoing process to be certain the hardware in a machine
373	  shutdown, so do not be surprised if this code does not
374	  initially work for you.
375
376config KEXEC_FILE
377	bool "kexec file based system call"
378	select KEXEC_CORE
379	select KEXEC_ELF
380	help
381	  This enables the kexec_file_load() System call. This is
382	  file based and takes file descriptors as system call argument
383	  for kernel and initramfs as opposed to list of segments as
384	  accepted by previous system call.
385
386endmenu
387
388source "drivers/firmware/Kconfig"
389
390source "drivers/parisc/Kconfig"
391