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_JUMP_LABEL
48 select HAVE_ARCH_JUMP_LABEL_RELATIVE
49 select HAVE_ARCH_SECCOMP_FILTER
50 select HAVE_ARCH_TRACEHOOK
51 select HAVE_REGS_AND_STACK_ACCESS_API
52 select GENERIC_SCHED_CLOCK
53 select HAVE_UNSTABLE_SCHED_CLOCK if SMP
54 select GENERIC_CLOCKEVENTS
55 select CPU_NO_EFFICIENT_FFS
56 select NEED_DMA_MAP_STATE
57 select NEED_SG_DMA_LENGTH
60 select HAVE_KRETPROBES
61 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
62 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
63 select HAVE_KPROBES_ON_FTRACE
64 select HAVE_DYNAMIC_FTRACE_WITH_REGS
67 The PA-RISC microprocessor is designed by Hewlett-Packard and used
68 in many of their workstations & servers (HP9000 700 and 800 series,
69 and later HP3000 series). The PA-RISC Linux project home page is
70 at <http://www.parisc-linux.org/>.
81 config GENERIC_LOCKBREAK
84 depends on SMP && PREEMPT
86 config ARCH_HAS_ILOG2_U32
90 config ARCH_HAS_ILOG2_U64
99 config GENERIC_HWEIGHT
103 config GENERIC_CALIBRATE_DELAY
112 # unless you want to implement ACPI on PA-RISC ... ;-)
116 config STACKTRACE_SUPPORT
122 config ARCH_MAY_HAVE_PC_FDC
127 config PGTABLE_LEVELS
129 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
132 config SYS_SUPPORTS_HUGETLBFS
136 menu "Processor type and features"
139 prompt "Processor type"
145 This is the processor type of your CPU. This information is
146 used for optimizing purposes. In order to compile a kernel
147 that can run on all 32-bit PA CPUs (albeit not optimally fast),
148 you can specify "PA7000" here.
150 Specifying "PA8000" here will allow you to select a 64-bit kernel
151 which is required on some machines.
156 Select this option for the PCX-L processor, as used in the
157 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
158 D200, D210, D300, D310 and E-class
163 Select this option for the PCX-T' processor, as used in the
164 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
165 K100, K200, K210, K220, K400, K410 and K420
170 Select this option for the PCX-L2 processor, as used in the
171 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
172 D220, D230, D320 and D330.
177 Select this option for PCX-U to PCX-W2 processors.
181 # Define implied options from the CPU selection here
189 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
190 select ARCH_HAS_SYNC_DMA_FOR_CPU
191 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
192 select DMA_NONCOHERENT_CACHE_SYNC
196 depends on PA8X00 || PA7200
199 bool "Enable the -mlong-calls compiler option for big kernels"
200 default y if !MODULES || UBSAN || FTRACE
204 If you configure the kernel to include many drivers built-in instead
205 as modules, the kernel executable may become too big, so that the
206 linker will not be able to resolve some long branches and fails to link
207 your vmlinux kernel. In that case enabling this option will help you
208 to overcome this limit by using the -mlong-calls compiler option.
210 Usually you want to say N here, unless you e.g. want to build
211 a kernel which includes all necessary drivers built-in and which can
212 be used for TFTP booting without the need to have an initrd ramdisk.
214 Enabling this option will probably slow down your kernel.
220 Enable this if you want to support 64bit kernel on PA-RISC platform.
222 At the moment, only people willing to use more than 2GB of RAM,
223 or having a 64bit-only capable PA-RISC machine should say Y here.
225 Since there is no 64bit userland on PA-RISC, there is no point to
226 enable this option otherwise. The 64bit kernel is significantly bigger
227 and slower than the 32bit one.
230 prompt "Kernel page size"
231 default PARISC_PAGE_SIZE_4KB
233 config PARISC_PAGE_SIZE_4KB
236 This lets you select the page size of the kernel. For best
237 performance, a page size of 16KB is recommended. For best
238 compatibility with 32bit applications, a page size of 4KB should be
239 selected (the vast majority of 32bit binaries work perfectly fine
240 with a larger page size).
242 4KB For best 32bit compatibility
243 16KB For best performance
244 64KB For best performance, might give more overhead.
246 If you don't know what to do, choose 4KB.
248 config PARISC_PAGE_SIZE_16KB
250 depends on PA8X00 && BROKEN
252 config PARISC_PAGE_SIZE_64KB
254 depends on PA8X00 && BROKEN
258 config PARISC_SELF_EXTRACT
259 bool "Build kernel as self-extracting executable"
262 Say Y if you want to build the parisc kernel as a kind of
263 self-extracting executable.
265 If you say N here, the kernel will be compressed with gzip
266 which can be loaded by the palo bootloader directly too.
268 If you don't know what to do here, say Y.
271 bool "Symmetric multi-processing support"
273 This enables support for systems with more than one CPU. If you have
274 a system with only one CPU, say N. If you have a system with more
277 If you say N here, the kernel will run on uni- and multiprocessor
278 machines, but will use only one CPU of a multiprocessor machine.
279 On a uniprocessor machine, the kernel will run faster if you say N.
281 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
282 available at <http://www.tldp.org/docs.html#howto>.
284 If you don't know what to do here, say N.
286 config PARISC_CPU_TOPOLOGY
287 bool "Support cpu topology definition"
291 Support PARISC cpu topology definition.
294 bool "Multi-core scheduler support"
295 depends on PARISC_CPU_TOPOLOGY && PA8X00
297 Multi-core scheduler support improves the CPU scheduler's decision
298 making when dealing with multi-core CPU chips at a cost of slightly
299 increased overhead in some places. If unsure say N here.
302 bool "Use separate kernel stacks when processing interrupts"
305 If you say Y here the kernel will use separate kernel stacks
306 for handling hard and soft interrupts. This can help avoid
307 overflowing the process kernel stacks.
313 config ARCH_SELECT_MEMORY_MODEL
317 config ARCH_SPARSEMEM_ENABLE
321 config ARCH_FLATMEM_ENABLE
324 config ARCH_SPARSEMEM_DEFAULT
326 depends on ARCH_SPARSEMEM_ENABLE
328 source "kernel/Kconfig.hz"
333 select COMPAT_BINFMT_ELF if BINFMT_ELF
335 config SYSVIPC_COMPAT
337 depends on COMPAT && SYSVIPC
343 int "Maximum number of CPUs (2-32)"
349 bool "Kexec system call"
352 kexec is a system call that implements the ability to shutdown your
353 current kernel, and to start another kernel. It is like a reboot
354 but it is independent of the system firmware. And like a reboot
355 you can start any kernel with it, not just Linux.
357 It is an ongoing process to be certain the hardware in a machine
358 shutdown, so do not be surprised if this code does not
359 initially work for you.
362 bool "kexec file based system call"
366 This enables the kexec_file_load() System call. This is
367 file based and takes file descriptors as system call argument
368 for kernel and initramfs as opposed to list of segments as
369 accepted by previous system call.
374 source "drivers/parisc/Kconfig"
378 prompt "Enable seccomp to safely compute untrusted bytecode"
380 This kernel feature is useful for number crunching applications
381 that may need to compute untrusted bytecode during their
382 execution. By using pipes or other transports made available to
383 the process as file descriptors supporting the read/write
384 syscalls, it's possible to isolate those applications in
385 their own address space using seccomp. Once seccomp is
386 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
387 and the task is only allowed to execute a few safe syscalls
388 defined by each seccomp mode.
390 If unsure, say Y. Only embedded should say N here.