xref: /openbmc/linux/arch/parisc/Kconfig (revision 44ecda71)
1 # SPDX-License-Identifier: GPL-2.0
2 config PARISC
3 	def_bool y
4 	select ALTERNATE_USER_ADDRESS_SPACE
5 	select ARCH_32BIT_OFF_T if !64BIT
6 	select ARCH_MIGHT_HAVE_PC_PARPORT
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_STRICT_MODULE_RWX
14 	select ARCH_HAS_UBSAN_SANITIZE_ALL
15 	select ARCH_HAS_PTE_SPECIAL
16 	select ARCH_NO_SG_CHAIN
17 	select ARCH_SUPPORTS_HUGETLBFS if PA20
18 	select ARCH_SUPPORTS_MEMORY_FAILURE
19 	select ARCH_STACKWALK
20 	select ARCH_HAS_DEBUG_VM_PGTABLE
21 	select HAVE_RELIABLE_STACKTRACE
22 	select DMA_OPS
23 	select RTC_CLASS
24 	select RTC_DRV_GENERIC
25 	select INIT_ALL_POSSIBLE
26 	select BUG
27 	select BUILDTIME_TABLE_SORT
28 	select HAVE_PCI
29 	select HAVE_PERF_EVENTS
30 	select HAVE_KERNEL_BZIP2
31 	select HAVE_KERNEL_GZIP
32 	select HAVE_KERNEL_LZ4
33 	select HAVE_KERNEL_LZMA
34 	select HAVE_KERNEL_LZO
35 	select HAVE_KERNEL_XZ
36 	select GENERIC_ATOMIC64 if !64BIT
37 	select GENERIC_IRQ_PROBE
38 	select GENERIC_PCI_IOMAP
39 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
40 	select GENERIC_SMP_IDLE_THREAD
41 	select GENERIC_ARCH_TOPOLOGY if SMP
42 	select GENERIC_CPU_DEVICES if !SMP
43 	select GENERIC_LIB_DEVMEM_IS_ALLOWED
44 	select SYSCTL_ARCH_UNALIGN_ALLOW
45 	select SYSCTL_EXCEPTION_TRACE
46 	select HAVE_MOD_ARCH_SPECIFIC
47 	select MODULES_USE_ELF_RELA
48 	select CLONE_BACKWARDS
49 	select TTY # Needed for pdc_cons.c
50 	select HAVE_DEBUG_STACKOVERFLOW
51 	select HAVE_ARCH_AUDITSYSCALL
52 	select HAVE_ARCH_HASH
53 	select HAVE_ARCH_JUMP_LABEL
54 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
55 	select HAVE_ARCH_KFENCE
56 	select HAVE_ARCH_SECCOMP_FILTER
57 	select HAVE_ARCH_TRACEHOOK
58 	select HAVE_REGS_AND_STACK_ACCESS_API
59 	select GENERIC_SCHED_CLOCK
60 	select GENERIC_IRQ_MIGRATION if SMP
61 	select HAVE_UNSTABLE_SCHED_CLOCK if SMP
62 	select LEGACY_TIMER_TICK
63 	select CPU_NO_EFFICIENT_FFS
64 	select THREAD_INFO_IN_TASK
65 	select NEED_DMA_MAP_STATE
66 	select NEED_SG_DMA_LENGTH
67 	select HAVE_ARCH_KGDB
68 	select HAVE_KPROBES
69 	select HAVE_KRETPROBES
70 	select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
71 	select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
72 	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
73 	select HAVE_KPROBES_ON_FTRACE
74 	select HAVE_DYNAMIC_FTRACE_WITH_REGS
75 	select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
76 	select TRACE_IRQFLAGS_SUPPORT
77 	select HAVE_FUNCTION_DESCRIPTORS if 64BIT
78 
79 	help
80 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
81 	  in many of their workstations & servers (HP9000 700 and 800 series,
82 	  and later HP3000 series).  The PA-RISC Linux project home page is
83 	  at <https://parisc.wiki.kernel.org>.
84 
85 config CPU_BIG_ENDIAN
86 	def_bool y
87 
88 config MMU
89 	def_bool y
90 
91 config STACK_GROWSUP
92 	def_bool y
93 
94 config GENERIC_LOCKBREAK
95 	bool
96 	default y
97 	depends on SMP && PREEMPTION
98 
99 config ARCH_HAS_ILOG2_U32
100 	bool
101 	default n
102 
103 config ARCH_HAS_ILOG2_U64
104 	bool
105 	default n
106 
107 config GENERIC_BUG
108 	bool
109 	default y
110 	depends on BUG
111 
112 config GENERIC_HWEIGHT
113 	bool
114 	default y
115 
116 config GENERIC_CALIBRATE_DELAY
117 	bool
118 	default y
119 
120 config TIME_LOW_RES
121 	bool
122 	depends on SMP
123 	default y
124 
125 # unless you want to implement ACPI on PA-RISC ... ;-)
126 config PM
127 	bool
128 
129 config STACKTRACE_SUPPORT
130 	def_bool y
131 
132 config ISA_DMA_API
133 	bool
134 
135 config ARCH_MAY_HAVE_PC_FDC
136 	bool
137 	depends on BROKEN
138 	default y
139 
140 config PGTABLE_LEVELS
141 	int
142 	default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
143 	default 2
144 
145 menu "Processor type and features"
146 
147 choice
148 	prompt "Processor type"
149 	default PA7000 if "$(ARCH)" = "parisc"
150 
151 config PA7000
152 	bool "PA7000/PA7100" if "$(ARCH)" = "parisc"
153 	help
154 	  This is the processor type of your CPU.  This information is
155 	  used for optimizing purposes.  In order to compile a kernel
156 	  that can run on all 32-bit PA CPUs (albeit not optimally fast),
157 	  you can specify "PA7000" here.
158 
159 	  Specifying "PA8000" here will allow you to select a 64-bit kernel
160 	  which is required on some machines.
161 
162 config PA7100LC
163 	bool "PA7100LC" if "$(ARCH)" = "parisc"
164 	help
165 	  Select this option for the PCX-L processor, as used in the
166 	  712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
167 	  D200, D210, D300, D310 and E-class
168 
169 config PA7200
170 	bool "PA7200" if "$(ARCH)" = "parisc"
171 	help
172 	  Select this option for the PCX-T' processor, as used in the
173 	  C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
174 	  K100, K200, K210, K220, K400, K410 and K420
175 
176 config PA7300LC
177 	bool "PA7300LC" if "$(ARCH)" = "parisc"
178 	help
179 	  Select this option for the PCX-L2 processor, as used in the
180 	  744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
181 	  D220, D230, D320 and D330.
182 
183 config PA8X00
184 	bool "PA8000 and up"
185 	help
186 	  Select this option for PCX-U to PCX-W2 processors.
187 
188 endchoice
189 
190 # Define implied options from the CPU selection here
191 
192 config PA20
193 	def_bool y
194 	depends on PA8X00
195 
196 config PA11
197 	def_bool y
198 	depends on PA7000 || PA7100LC || PA7200 || PA7300LC
199 	select ARCH_HAS_SYNC_DMA_FOR_CPU
200 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
201 
202 config PREFETCH
203 	def_bool y
204 	depends on PA8X00 || PA7200
205 
206 config PARISC_HUGE_KERNEL
207 	def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
208 
209 config MLONGCALLS
210 	def_bool y if PARISC_HUGE_KERNEL
211 	bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
212 	depends on PA8X00
213 	help
214 	  If you configure the kernel to include many drivers built-in instead
215 	  as modules, the kernel executable may become too big, so that the
216 	  linker will not be able to resolve some long branches and fails to link
217 	  your vmlinux kernel. In that case enabling this option will help you
218 	  to overcome this limit by using the -mlong-calls compiler option.
219 
220 	  Usually you want to say N here, unless you e.g. want to build
221 	  a kernel which includes all necessary drivers built-in and which can
222 	  be used for TFTP booting without the need to have an initrd ramdisk.
223 
224 	  Enabling this option will probably slow down your kernel.
225 
226 config 64BIT
227 	def_bool y if "$(ARCH)" = "parisc64"
228 	bool "64-bit kernel" if "$(ARCH)" = "parisc"
229 	depends on PA8X00
230 	help
231 	  Enable this if you want to support 64bit kernel on PA-RISC platform.
232 
233 	  At the moment, only people willing to use more than 2GB of RAM,
234 	  or having a 64bit-only capable PA-RISC machine should say Y here.
235 
236 	  Since there is no 64bit userland on PA-RISC, there is no point to
237 	  enable this option otherwise. The 64bit kernel is significantly bigger
238 	  and slower than the 32bit one.
239 
240 choice
241 	prompt "Kernel page size"
242 	default PARISC_PAGE_SIZE_4KB
243 
244 config PARISC_PAGE_SIZE_4KB
245 	bool "4KB"
246 	help
247 	  This lets you select the page size of the kernel.  For best
248 	  performance, a page size of 16KB is recommended.  For best
249 	  compatibility with 32bit applications, a page size of 4KB should be
250 	  selected (the vast majority of 32bit binaries work perfectly fine
251 	  with a larger page size).
252 
253 	  4KB                For best 32bit compatibility
254 	  16KB               For best performance
255 	  64KB               For best performance, might give more overhead.
256 
257 	  If you don't know what to do, choose 4KB.
258 
259 config PARISC_PAGE_SIZE_16KB
260 	bool "16KB"
261 	depends on PA8X00 && BROKEN && !KFENCE
262 
263 config PARISC_PAGE_SIZE_64KB
264 	bool "64KB"
265 	depends on PA8X00 && BROKEN && !KFENCE
266 
267 endchoice
268 
269 config SMP
270 	bool "Symmetric multi-processing support"
271 	help
272 	  This enables support for systems with more than one CPU. If you have
273 	  a system with only one CPU, say N. If you have a system with more
274 	  than one CPU, say Y.
275 
276 	  If you say N here, the kernel will run on uni- and multiprocessor
277 	  machines, but will use only one CPU of a multiprocessor machine.
278 	  On a uniprocessor machine, the kernel will run faster if you say N.
279 
280 	  See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
281 	  available at <https://www.tldp.org/docs.html#howto>.
282 
283 	  If you don't know what to do here, say N.
284 
285 config SCHED_MC
286 	bool "Multi-core scheduler support"
287 	depends on GENERIC_ARCH_TOPOLOGY && PA8X00
288 	help
289 	  Multi-core scheduler support improves the CPU scheduler's decision
290 	  making when dealing with multi-core CPU chips at a cost of slightly
291 	  increased overhead in some places. If unsure say N here.
292 
293 config IRQSTACKS
294 	bool "Use separate kernel stacks when processing interrupts"
295 	default y
296 	help
297 	  If you say Y here the kernel will use separate kernel stacks
298 	  for handling hard and soft interrupts.  This can help avoid
299 	  overflowing the process kernel stacks.
300 
301 config TLB_PTLOCK
302 	bool "Use page table locks in TLB fault handler"
303 	depends on SMP
304 	default n
305 	help
306 	  Select this option to enable page table locking in the TLB
307 	  fault handler. This ensures that page table entries are
308 	  updated consistently on SMP machines at the expense of some
309 	  loss in performance.
310 
311 config HOTPLUG_CPU
312 	bool
313 	default y if SMP
314 
315 config ARCH_SELECT_MEMORY_MODEL
316 	def_bool y
317 	depends on 64BIT
318 
319 config ARCH_SPARSEMEM_ENABLE
320 	def_bool y
321 	depends on 64BIT
322 
323 config ARCH_FLATMEM_ENABLE
324 	def_bool y
325 
326 config ARCH_SPARSEMEM_DEFAULT
327 	def_bool y
328 	depends on ARCH_SPARSEMEM_ENABLE
329 
330 source "kernel/Kconfig.hz"
331 
332 config COMPAT
333 	def_bool y
334 	depends on 64BIT
335 
336 config AUDIT_ARCH
337 	def_bool y
338 
339 config NR_CPUS
340 	int "Maximum number of CPUs (2-32)"
341 	range 2 32
342 	depends on SMP
343 	default "4" if 64BIT
344 	default "16"
345 
346 config KEXEC
347 	bool "Kexec system call"
348 	select KEXEC_CORE
349 	help
350 	  kexec is a system call that implements the ability to shutdown your
351 	  current kernel, and to start another kernel.  It is like a reboot
352 	  but it is independent of the system firmware.   And like a reboot
353 	  you can start any kernel with it, not just Linux.
354 
355 	  It is an ongoing process to be certain the hardware in a machine
356 	  shutdown, so do not be surprised if this code does not
357 	  initially work for you.
358 
359 config KEXEC_FILE
360 	bool "kexec file based system call"
361 	select KEXEC_CORE
362 	select KEXEC_ELF
363 	help
364 	  This enables the kexec_file_load() System call. This is
365 	  file based and takes file descriptors as system call argument
366 	  for kernel and initramfs as opposed to list of segments as
367 	  accepted by previous system call.
368 
369 endmenu
370 
371 source "drivers/parisc/Kconfig"
372