1 # SPDX-License-Identifier: GPL-2.0
4 select ARCH_32BIT_OFF_T if !64BIT
5 select ARCH_MIGHT_HAVE_PC_PARPORT
8 select HAVE_FUNCTION_TRACER
9 select HAVE_FUNCTION_GRAPH_TRACER
10 select HAVE_SYSCALL_TRACEPOINTS
11 select ARCH_WANT_FRAME_POINTERS
12 select ARCH_HAS_ELF_RANDOMIZE
13 select ARCH_HAS_STRICT_KERNEL_RWX
14 select ARCH_HAS_UBSAN_SANITIZE_ALL
15 select ARCH_NO_SG_CHAIN
16 select ARCH_SUPPORTS_MEMORY_FAILURE
18 select RTC_DRV_GENERIC
19 select INIT_ALL_POSSIBLE
21 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 HAVE_REGS_AND_STACK_ACCESS_API
50 select GENERIC_SCHED_CLOCK
51 select HAVE_UNSTABLE_SCHED_CLOCK if SMP
52 select GENERIC_CLOCKEVENTS
53 select ARCH_NO_COHERENT_DMA_MMAP
54 select CPU_NO_EFFICIENT_FFS
55 select NEED_DMA_MAP_STATE
56 select NEED_SG_DMA_LENGTH
59 The PA-RISC microprocessor is designed by Hewlett-Packard and used
60 in many of their workstations & servers (HP9000 700 and 800 series,
61 and later HP3000 series). The PA-RISC Linux project home page is
62 at <http://www.parisc-linux.org/>.
73 config GENERIC_LOCKBREAK
76 depends on SMP && PREEMPT
78 config ARCH_HAS_ILOG2_U32
82 config ARCH_HAS_ILOG2_U64
91 config GENERIC_HWEIGHT
95 config GENERIC_CALIBRATE_DELAY
104 # unless you want to implement ACPI on PA-RISC ... ;-)
108 config STACKTRACE_SUPPORT
114 config ARCH_MAY_HAVE_PC_FDC
119 config PGTABLE_LEVELS
121 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
124 config SYS_SUPPORTS_HUGETLBFS
128 menu "Processor type and features"
131 prompt "Processor type"
137 This is the processor type of your CPU. This information is
138 used for optimizing purposes. In order to compile a kernel
139 that can run on all 32-bit PA CPUs (albeit not optimally fast),
140 you can specify "PA7000" here.
142 Specifying "PA8000" here will allow you to select a 64-bit kernel
143 which is required on some machines.
148 Select this option for the PCX-L processor, as used in the
149 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
150 D200, D210, D300, D310 and E-class
155 Select this option for the PCX-T' processor, as used in the
156 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
157 K100, K200, K210, K220, K400, K410 and K420
162 Select this option for the PCX-L2 processor, as used in the
163 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
164 D220, D230, D320 and D330.
169 Select this option for PCX-U to PCX-W2 processors.
173 # Define implied options from the CPU selection here
181 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
182 select ARCH_HAS_SYNC_DMA_FOR_CPU
183 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
184 select DMA_NONCOHERENT_CACHE_SYNC
188 depends on PA8X00 || PA7200
191 bool "Enable the -mlong-calls compiler option for big kernels"
195 If you configure the kernel to include many drivers built-in instead
196 as modules, the kernel executable may become too big, so that the
197 linker will not be able to resolve some long branches and fails to link
198 your vmlinux kernel. In that case enabling this option will help you
199 to overcome this limit by using the -mlong-calls compiler option.
201 Usually you want to say N here, unless you e.g. want to build
202 a kernel which includes all necessary drivers built-in and which can
203 be used for TFTP booting without the need to have an initrd ramdisk.
205 Enabling this option will probably slow down your kernel.
211 Enable this if you want to support 64bit kernel on PA-RISC platform.
213 At the moment, only people willing to use more than 2GB of RAM,
214 or having a 64bit-only capable PA-RISC machine should say Y here.
216 Since there is no 64bit userland on PA-RISC, there is no point to
217 enable this option otherwise. The 64bit kernel is significantly bigger
218 and slower than the 32bit one.
221 prompt "Kernel page size"
222 default PARISC_PAGE_SIZE_4KB
224 config PARISC_PAGE_SIZE_4KB
227 This lets you select the page size of the kernel. For best
228 performance, a page size of 16KB is recommended. For best
229 compatibility with 32bit applications, a page size of 4KB should be
230 selected (the vast majority of 32bit binaries work perfectly fine
231 with a larger page size).
233 4KB For best 32bit compatibility
234 16KB For best performance
235 64KB For best performance, might give more overhead.
237 If you don't know what to do, choose 4KB.
239 config PARISC_PAGE_SIZE_16KB
241 depends on PA8X00 && BROKEN
243 config PARISC_PAGE_SIZE_64KB
245 depends on PA8X00 && BROKEN
249 config PARISC_SELF_EXTRACT
250 bool "Build kernel as self-extracting executable"
253 Say Y if you want to build the parisc kernel as a kind of
254 self-extracting executable.
256 If you say N here, the kernel will be compressed with gzip
257 which can be loaded by the palo bootloader directly too.
259 If you don't know what to do here, say Y.
262 bool "Symmetric multi-processing support"
264 This enables support for systems with more than one CPU. If you have
265 a system with only one CPU, say N. If you have a system with more
268 If you say N here, the kernel will run on uni- and multiprocessor
269 machines, but will use only one CPU of a multiprocessor machine.
270 On a uniprocessor machine, the kernel will run faster if you say N.
272 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
273 available at <http://www.tldp.org/docs.html#howto>.
275 If you don't know what to do here, say N.
277 config PARISC_CPU_TOPOLOGY
278 bool "Support cpu topology definition"
282 Support PARISC cpu topology definition.
285 bool "Multi-core scheduler support"
286 depends on PARISC_CPU_TOPOLOGY && PA8X00
288 Multi-core scheduler support improves the CPU scheduler's decision
289 making when dealing with multi-core CPU chips at a cost of slightly
290 increased overhead in some places. If unsure say N here.
293 bool "Use separate kernel stacks when processing interrupts"
296 If you say Y here the kernel will use separate kernel stacks
297 for handling hard and soft interrupts. This can help avoid
298 overflowing the process kernel stacks.
304 config ARCH_SELECT_MEMORY_MODEL
308 config ARCH_DISCONTIGMEM_ENABLE
312 config ARCH_FLATMEM_ENABLE
315 config ARCH_DISCONTIGMEM_DEFAULT
317 depends on ARCH_DISCONTIGMEM_ENABLE
322 depends on NEED_MULTIPLE_NODES
324 source "kernel/Kconfig.hz"
329 select COMPAT_BINFMT_ELF if BINFMT_ELF
331 config SYSVIPC_COMPAT
333 depends on COMPAT && SYSVIPC
339 int "Maximum number of CPUs (2-32)"
347 source "drivers/parisc/Kconfig"
351 prompt "Enable seccomp to safely compute untrusted bytecode"
353 This kernel feature is useful for number crunching applications
354 that may need to compute untrusted bytecode during their
355 execution. By using pipes or other transports made available to
356 the process as file descriptors supporting the read/write
357 syscalls, it's possible to isolate those applications in
358 their own address space using seccomp. Once seccomp is
359 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
360 and the task is only allowed to execute a few safe syscalls
361 defined by each seccomp mode.
363 If unsure, say Y. Only embedded should say N here.