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_STRICT_MODULE_RWX
15 select ARCH_HAS_UBSAN_SANITIZE_ALL
16 select ARCH_NO_SG_CHAIN
17 select ARCH_SUPPORTS_MEMORY_FAILURE
19 select RTC_DRV_GENERIC
20 select INIT_ALL_POSSIBLE
22 select BUILDTIME_EXTABLE_SORT
24 select HAVE_PERF_EVENTS
25 select HAVE_KERNEL_BZIP2
26 select HAVE_KERNEL_GZIP
27 select HAVE_KERNEL_LZ4
28 select HAVE_KERNEL_LZMA
29 select HAVE_KERNEL_LZO
31 select GENERIC_ATOMIC64 if !64BIT
32 select GENERIC_IRQ_PROBE
33 select GENERIC_PCI_IOMAP
34 select ARCH_HAVE_NMI_SAFE_CMPXCHG
35 select GENERIC_SMP_IDLE_THREAD
36 select GENERIC_CPU_DEVICES
37 select GENERIC_STRNCPY_FROM_USER
38 select SYSCTL_ARCH_UNALIGN_ALLOW
39 select SYSCTL_EXCEPTION_TRACE
40 select HAVE_MOD_ARCH_SPECIFIC
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
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 GENERIC_CLOCKEVENTS
56 select CPU_NO_EFFICIENT_FFS
57 select NEED_DMA_MAP_STATE
58 select NEED_SG_DMA_LENGTH
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 HAVE_KPROBES_ON_FTRACE
65 select HAVE_DYNAMIC_FTRACE_WITH_REGS
66 select HAVE_COPY_THREAD_TLS
69 The PA-RISC microprocessor is designed by Hewlett-Packard and used
70 in many of their workstations & servers (HP9000 700 and 800 series,
71 and later HP3000 series). The PA-RISC Linux project home page is
72 at <http://www.parisc-linux.org/>.
83 config GENERIC_LOCKBREAK
86 depends on SMP && PREEMPT
88 config ARCH_HAS_ILOG2_U32
92 config ARCH_HAS_ILOG2_U64
101 config GENERIC_HWEIGHT
105 config GENERIC_CALIBRATE_DELAY
114 # unless you want to implement ACPI on PA-RISC ... ;-)
118 config STACKTRACE_SUPPORT
124 config ARCH_MAY_HAVE_PC_FDC
129 config PGTABLE_LEVELS
131 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
134 config SYS_SUPPORTS_HUGETLBFS
138 menu "Processor type and features"
141 prompt "Processor type"
147 This is the processor type of your CPU. This information is
148 used for optimizing purposes. In order to compile a kernel
149 that can run on all 32-bit PA CPUs (albeit not optimally fast),
150 you can specify "PA7000" here.
152 Specifying "PA8000" here will allow you to select a 64-bit kernel
153 which is required on some machines.
158 Select this option for the PCX-L processor, as used in the
159 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
160 D200, D210, D300, D310 and E-class
165 Select this option for the PCX-T' processor, as used in the
166 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
167 K100, K200, K210, K220, K400, K410 and K420
172 Select this option for the PCX-L2 processor, as used in the
173 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
174 D220, D230, D320 and D330.
179 Select this option for PCX-U to PCX-W2 processors.
183 # Define implied options from the CPU selection here
191 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
192 select ARCH_HAS_SYNC_DMA_FOR_CPU
193 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
194 select DMA_NONCOHERENT_CACHE_SYNC
198 depends on PA8X00 || PA7200
201 bool "Enable the -mlong-calls compiler option for big kernels"
202 default y if !MODULES || UBSAN || FTRACE
206 If you configure the kernel to include many drivers built-in instead
207 as modules, the kernel executable may become too big, so that the
208 linker will not be able to resolve some long branches and fails to link
209 your vmlinux kernel. In that case enabling this option will help you
210 to overcome this limit by using the -mlong-calls compiler option.
212 Usually you want to say N here, unless you e.g. want to build
213 a kernel which includes all necessary drivers built-in and which can
214 be used for TFTP booting without the need to have an initrd ramdisk.
216 Enabling this option will probably slow down your kernel.
222 Enable this if you want to support 64bit kernel on PA-RISC platform.
224 At the moment, only people willing to use more than 2GB of RAM,
225 or having a 64bit-only capable PA-RISC machine should say Y here.
227 Since there is no 64bit userland on PA-RISC, there is no point to
228 enable this option otherwise. The 64bit kernel is significantly bigger
229 and slower than the 32bit one.
232 prompt "Kernel page size"
233 default PARISC_PAGE_SIZE_4KB
235 config PARISC_PAGE_SIZE_4KB
238 This lets you select the page size of the kernel. For best
239 performance, a page size of 16KB is recommended. For best
240 compatibility with 32bit applications, a page size of 4KB should be
241 selected (the vast majority of 32bit binaries work perfectly fine
242 with a larger page size).
244 4KB For best 32bit compatibility
245 16KB For best performance
246 64KB For best performance, might give more overhead.
248 If you don't know what to do, choose 4KB.
250 config PARISC_PAGE_SIZE_16KB
252 depends on PA8X00 && BROKEN
254 config PARISC_PAGE_SIZE_64KB
256 depends on PA8X00 && BROKEN
260 config PARISC_SELF_EXTRACT
261 bool "Build kernel as self-extracting executable"
264 Say Y if you want to build the parisc kernel as a kind of
265 self-extracting executable.
267 If you say N here, the kernel will be compressed with gzip
268 which can be loaded by the palo bootloader directly too.
270 If you don't know what to do here, say Y.
273 bool "Symmetric multi-processing support"
275 This enables support for systems with more than one CPU. If you have
276 a system with only one CPU, say N. If you have a system with more
279 If you say N here, the kernel will run on uni- and multiprocessor
280 machines, but will use only one CPU of a multiprocessor machine.
281 On a uniprocessor machine, the kernel will run faster if you say N.
283 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
284 available at <http://www.tldp.org/docs.html#howto>.
286 If you don't know what to do here, say N.
288 config PARISC_CPU_TOPOLOGY
289 bool "Support cpu topology definition"
293 Support PARISC cpu topology definition.
296 bool "Multi-core scheduler support"
297 depends on PARISC_CPU_TOPOLOGY && PA8X00
299 Multi-core scheduler support improves the CPU scheduler's decision
300 making when dealing with multi-core CPU chips at a cost of slightly
301 increased overhead in some places. If unsure say N here.
304 bool "Use separate kernel stacks when processing interrupts"
307 If you say Y here the kernel will use separate kernel stacks
308 for handling hard and soft interrupts. This can help avoid
309 overflowing the process kernel stacks.
315 config ARCH_SELECT_MEMORY_MODEL
319 config ARCH_SPARSEMEM_ENABLE
323 config ARCH_FLATMEM_ENABLE
326 config ARCH_SPARSEMEM_DEFAULT
328 depends on ARCH_SPARSEMEM_ENABLE
330 source "kernel/Kconfig.hz"
335 select COMPAT_BINFMT_ELF if BINFMT_ELF
337 config SYSVIPC_COMPAT
339 depends on COMPAT && SYSVIPC
345 int "Maximum number of CPUs (2-32)"
351 bool "Kexec system call"
354 kexec is a system call that implements the ability to shutdown your
355 current kernel, and to start another kernel. It is like a reboot
356 but it is independent of the system firmware. And like a reboot
357 you can start any kernel with it, not just Linux.
359 It is an ongoing process to be certain the hardware in a machine
360 shutdown, so do not be surprised if this code does not
361 initially work for you.
364 bool "kexec file based system call"
368 This enables the kexec_file_load() System call. This is
369 file based and takes file descriptors as system call argument
370 for kernel and initramfs as opposed to list of segments as
371 accepted by previous system call.
376 source "drivers/parisc/Kconfig"
380 prompt "Enable seccomp to safely compute untrusted bytecode"
382 This kernel feature is useful for number crunching applications
383 that may need to compute untrusted bytecode during their
384 execution. By using pipes or other transports made available to
385 the process as file descriptors supporting the read/write
386 syscalls, it's possible to isolate those applications in
387 their own address space using seccomp. Once seccomp is
388 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
389 and the task is only allowed to execute a few safe syscalls
390 defined by each seccomp mode.
392 If unsure, say Y. Only embedded should say N here.