1 # SPDX-License-Identifier: GPL-2.0
4 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_UBSAN_SANITIZE_ALL
14 select ARCH_WANTS_UBSAN_NO_NULL
15 select ARCH_SUPPORTS_MEMORY_FAILURE
17 select RTC_DRV_GENERIC
18 select INIT_ALL_POSSIBLE
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
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
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
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
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/>.
72 config GENERIC_LOCKBREAK
75 depends on SMP && PREEMPT
77 config RWSEM_GENERIC_SPINLOCK
80 config RWSEM_XCHGADD_ALGORITHM
83 config ARCH_HAS_ILOG2_U32
87 config ARCH_HAS_ILOG2_U64
96 config GENERIC_HWEIGHT
100 config GENERIC_CALIBRATE_DELAY
109 # unless you want to implement ACPI on PA-RISC ... ;-)
113 config STACKTRACE_SUPPORT
119 config ARCH_MAY_HAVE_PC_FDC
124 config PGTABLE_LEVELS
126 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
129 config SYS_SUPPORTS_HUGETLBFS
133 menu "Processor type and features"
136 prompt "Processor type"
142 This is the processor type of your CPU. This information is
143 used for optimizing purposes. In order to compile a kernel
144 that can run on all 32-bit PA CPUs (albeit not optimally fast),
145 you can specify "PA7000" here.
147 Specifying "PA8000" here will allow you to select a 64-bit kernel
148 which is required on some machines.
153 Select this option for the PCX-L processor, as used in the
154 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
155 D200, D210, D300, D310 and E-class
160 Select this option for the PCX-T' processor, as used in the
161 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
162 K100, K200, K210, K220, K400, K410 and K420
167 Select this option for the PCX-L2 processor, as used in the
168 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
169 D220, D230, D320 and D330.
174 Select this option for PCX-U to PCX-W2 processors.
178 # Define implied options from the CPU selection here
186 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
190 depends on PA8X00 || PA7200
193 bool "Enable the -mlong-calls compiler option for big kernels"
194 def_bool y if (!MODULES)
197 If you configure the kernel to include many drivers built-in instead
198 as modules, the kernel executable may become too big, so that the
199 linker will not be able to resolve some long branches and fails to link
200 your vmlinux kernel. In that case enabling this option will help you
201 to overcome this limit by using the -mlong-calls compiler option.
203 Usually you want to say N here, unless you e.g. want to build
204 a kernel which includes all necessary drivers built-in and which can
205 be used for TFTP booting without the need to have an initrd ramdisk.
207 Enabling this option will probably slow down your kernel.
213 Enable this if you want to support 64bit kernel on PA-RISC platform.
215 At the moment, only people willing to use more than 2GB of RAM,
216 or having a 64bit-only capable PA-RISC machine should say Y here.
218 Since there is no 64bit userland on PA-RISC, there is no point to
219 enable this option otherwise. The 64bit kernel is significantly bigger
220 and slower than the 32bit one.
223 prompt "Kernel page size"
224 default PARISC_PAGE_SIZE_4KB
226 config PARISC_PAGE_SIZE_4KB
229 This lets you select the page size of the kernel. For best
230 performance, a page size of 16KB is recommended. For best
231 compatibility with 32bit applications, a page size of 4KB should be
232 selected (the vast majority of 32bit binaries work perfectly fine
233 with a larger page size).
235 4KB For best 32bit compatibility
236 16KB For best performance
237 64KB For best performance, might give more overhead.
239 If you don't know what to do, choose 4KB.
241 config PARISC_PAGE_SIZE_16KB
243 depends on PA8X00 && BROKEN
245 config PARISC_PAGE_SIZE_64KB
247 depends on PA8X00 && BROKEN
251 config PARISC_SELF_EXTRACT
252 bool "Build kernel as self-extracting executable"
255 Say Y if you want to build the parisc kernel as a kind of
256 self-extracting executable.
258 If you say N here, the kernel will be compressed with gzip
259 which can be loaded by the palo bootloader directly too.
261 If you don't know what to do here, say Y.
264 bool "Symmetric multi-processing support"
266 This enables support for systems with more than one CPU. If you have
267 a system with only one CPU, say N. If you have a system with more
270 If you say N here, the kernel will run on uni- and multiprocessor
271 machines, but will use only one CPU of a multiprocessor machine.
272 On a uniprocessor machine, the kernel will run faster if you say N.
274 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
275 available at <http://www.tldp.org/docs.html#howto>.
277 If you don't know what to do here, say N.
279 config PARISC_CPU_TOPOLOGY
280 bool "Support cpu topology definition"
284 Support PARISC cpu topology definition.
287 bool "Multi-core scheduler support"
288 depends on PARISC_CPU_TOPOLOGY && PA8X00
290 Multi-core scheduler support improves the CPU scheduler's decision
291 making when dealing with multi-core CPU chips at a cost of slightly
292 increased overhead in some places. If unsure say N here.
295 bool "Use separate kernel stacks when processing interrupts"
298 If you say Y here the kernel will use separate kernel stacks
299 for handling hard and soft interrupts. This can help avoid
300 overflowing the process kernel stacks.
306 config ARCH_SELECT_MEMORY_MODEL
310 config ARCH_DISCONTIGMEM_ENABLE
314 config ARCH_FLATMEM_ENABLE
317 config ARCH_DISCONTIGMEM_DEFAULT
319 depends on ARCH_DISCONTIGMEM_ENABLE
324 depends on NEED_MULTIPLE_NODES
326 source "kernel/Kconfig.preempt"
327 source "kernel/Kconfig.hz"
332 select COMPAT_BINFMT_ELF if BINFMT_ELF
334 config SYSVIPC_COMPAT
336 depends on COMPAT && SYSVIPC
342 int "Maximum number of CPUs (2-32)"
350 source "drivers/parisc/Kconfig"
354 prompt "Enable seccomp to safely compute untrusted bytecode"
356 This kernel feature is useful for number crunching applications
357 that may need to compute untrusted bytecode during their
358 execution. By using pipes or other transports made available to
359 the process as file descriptors supporting the read/write
360 syscalls, it's possible to isolate those applications in
361 their own address space using seccomp. Once seccomp is
362 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
363 and the task is only allowed to execute a few safe syscalls
364 defined by each seccomp mode.
366 If unsure, say Y. Only embedded should say N here.