1 # SPDX-License-Identifier: GPL-2.0
4 select ARCH_32BIT_OFF_T if !64BIT
5 select ARCH_MIGHT_HAVE_PC_PARPORT
6 select HAVE_FUNCTION_TRACER
7 select HAVE_FUNCTION_GRAPH_TRACER
8 select HAVE_SYSCALL_TRACEPOINTS
9 select ARCH_WANT_FRAME_POINTERS
10 select ARCH_HAS_ELF_RANDOMIZE
11 select ARCH_HAS_STRICT_KERNEL_RWX
12 select ARCH_HAS_UBSAN_SANITIZE_ALL
13 select ARCH_NO_SG_CHAIN
14 select ARCH_SUPPORTS_HUGETLBFS if PA20
15 select ARCH_SUPPORTS_MEMORY_FAILURE
17 select HAVE_RELIABLE_STACKTRACE
20 select RTC_DRV_GENERIC
21 select INIT_ALL_POSSIBLE
23 select BUILDTIME_TABLE_SORT
25 select HAVE_PERF_EVENTS
26 select HAVE_KERNEL_BZIP2
27 select HAVE_KERNEL_GZIP
28 select HAVE_KERNEL_LZ4
29 select HAVE_KERNEL_LZMA
30 select HAVE_KERNEL_LZO
32 select GENERIC_ATOMIC64 if !64BIT
33 select GENERIC_IRQ_PROBE
34 select GENERIC_PCI_IOMAP
35 select ARCH_HAVE_NMI_SAFE_CMPXCHG
36 select GENERIC_SMP_IDLE_THREAD
37 select GENERIC_CPU_DEVICES
38 select GENERIC_LIB_DEVMEM_IS_ALLOWED
39 select SYSCTL_ARCH_UNALIGN_ALLOW
40 select SYSCTL_EXCEPTION_TRACE
41 select HAVE_MOD_ARCH_SPECIFIC
43 select MODULES_USE_ELF_RELA
44 select CLONE_BACKWARDS
45 select TTY # Needed for pdc_cons.c
46 select HAVE_DEBUG_STACKOVERFLOW
47 select HAVE_ARCH_AUDITSYSCALL
49 select HAVE_ARCH_JUMP_LABEL
50 select HAVE_ARCH_JUMP_LABEL_RELATIVE
51 select HAVE_ARCH_KFENCE
52 select HAVE_ARCH_SECCOMP_FILTER
53 select HAVE_ARCH_TRACEHOOK
54 select HAVE_REGS_AND_STACK_ACCESS_API
55 select GENERIC_SCHED_CLOCK
56 select HAVE_UNSTABLE_SCHED_CLOCK if SMP
57 select LEGACY_TIMER_TICK
58 select CPU_NO_EFFICIENT_FFS
59 select THREAD_INFO_IN_TASK
60 select NEED_DMA_MAP_STATE
61 select NEED_SG_DMA_LENGTH
64 select HAVE_KRETPROBES
65 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
66 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
67 select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
68 select HAVE_KPROBES_ON_FTRACE
69 select HAVE_DYNAMIC_FTRACE_WITH_REGS
70 select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
71 select TRACE_IRQFLAGS_SUPPORT
74 The PA-RISC microprocessor is designed by Hewlett-Packard and used
75 in many of their workstations & servers (HP9000 700 and 800 series,
76 and later HP3000 series). The PA-RISC Linux project home page is
77 at <https://parisc.wiki.kernel.org>.
90 default "arch/parisc/configs/generic-32bit_defconfig" if !64BIT
91 default "arch/parisc/configs/generic-64bit_defconfig" if 64BIT
93 config GENERIC_LOCKBREAK
96 depends on SMP && PREEMPTION
98 config ARCH_HAS_ILOG2_U32
102 config ARCH_HAS_ILOG2_U64
111 config GENERIC_HWEIGHT
115 config GENERIC_CALIBRATE_DELAY
124 # unless you want to implement ACPI on PA-RISC ... ;-)
128 config STACKTRACE_SUPPORT
134 config ARCH_MAY_HAVE_PC_FDC
139 config PGTABLE_LEVELS
141 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
144 menu "Processor type and features"
147 prompt "Processor type"
153 This is the processor type of your CPU. This information is
154 used for optimizing purposes. In order to compile a kernel
155 that can run on all 32-bit PA CPUs (albeit not optimally fast),
156 you can specify "PA7000" here.
158 Specifying "PA8000" here will allow you to select a 64-bit kernel
159 which is required on some machines.
164 Select this option for the PCX-L processor, as used in the
165 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
166 D200, D210, D300, D310 and E-class
171 Select this option for the PCX-T' processor, as used in the
172 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
173 K100, K200, K210, K220, K400, K410 and K420
178 Select this option for the PCX-L2 processor, as used in the
179 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
180 D220, D230, D320 and D330.
185 Select this option for PCX-U to PCX-W2 processors.
189 # Define implied options from the CPU selection here
197 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
198 select ARCH_HAS_SYNC_DMA_FOR_CPU
199 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
203 depends on PA8X00 || PA7200
205 config PARISC_HUGE_KERNEL
206 def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
209 def_bool y if PARISC_HUGE_KERNEL
210 bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
213 If you configure the kernel to include many drivers built-in instead
214 as modules, the kernel executable may become too big, so that the
215 linker will not be able to resolve some long branches and fails to link
216 your vmlinux kernel. In that case enabling this option will help you
217 to overcome this limit by using the -mlong-calls compiler option.
219 Usually you want to say N here, unless you e.g. want to build
220 a kernel which includes all necessary drivers built-in and which can
221 be used for TFTP booting without the need to have an initrd ramdisk.
223 Enabling this option will probably slow down your kernel.
229 Enable this if you want to support 64bit kernel on PA-RISC platform.
231 At the moment, only people willing to use more than 2GB of RAM,
232 or having a 64bit-only capable PA-RISC machine should say Y here.
234 Since there is no 64bit userland on PA-RISC, there is no point to
235 enable this option otherwise. The 64bit kernel is significantly bigger
236 and slower than the 32bit one.
239 prompt "Kernel page size"
240 default PARISC_PAGE_SIZE_4KB
242 config PARISC_PAGE_SIZE_4KB
245 This lets you select the page size of the kernel. For best
246 performance, a page size of 16KB is recommended. For best
247 compatibility with 32bit applications, a page size of 4KB should be
248 selected (the vast majority of 32bit binaries work perfectly fine
249 with a larger page size).
251 4KB For best 32bit compatibility
252 16KB For best performance
253 64KB For best performance, might give more overhead.
255 If you don't know what to do, choose 4KB.
257 config PARISC_PAGE_SIZE_16KB
259 depends on PA8X00 && BROKEN && !KFENCE
261 config PARISC_PAGE_SIZE_64KB
263 depends on PA8X00 && BROKEN && !KFENCE
267 config PARISC_SELF_EXTRACT
268 bool "Build kernel as self-extracting executable"
271 Say Y if you want to build the parisc kernel as a kind of
272 self-extracting executable.
274 If you say N here, the kernel will be compressed with gzip
275 which can be loaded by the palo bootloader directly too.
277 If you don't know what to do here, say Y.
280 bool "Symmetric multi-processing support"
282 This enables support for systems with more than one CPU. If you have
283 a system with only one CPU, say N. If you have a system with more
286 If you say N here, the kernel will run on uni- and multiprocessor
287 machines, but will use only one CPU of a multiprocessor machine.
288 On a uniprocessor machine, the kernel will run faster if you say N.
290 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
291 available at <https://www.tldp.org/docs.html#howto>.
293 If you don't know what to do here, say N.
296 bool "Support TOC switch"
297 default y if 64BIT || !SMP
299 Most PA-RISC machines have either a switch at the back of the machine
300 or a command in BMC to trigger a TOC interrupt. If you say Y here a
301 handler will be installed which will either show a backtrace on all
302 CPUs, or enter a possible configured debugger like kgdb/kdb.
304 Note that with this option enabled, the kernel will use an additional 16KB
305 per possible CPU as a special stack for the TOC handler.
307 If you don't want to debug the Kernel, say N.
309 config PARISC_CPU_TOPOLOGY
310 bool "Support cpu topology definition"
314 Support PARISC cpu topology definition.
317 bool "Multi-core scheduler support"
318 depends on PARISC_CPU_TOPOLOGY && PA8X00
320 Multi-core scheduler support improves the CPU scheduler's decision
321 making when dealing with multi-core CPU chips at a cost of slightly
322 increased overhead in some places. If unsure say N here.
325 bool "Use separate kernel stacks when processing interrupts"
328 If you say Y here the kernel will use separate kernel stacks
329 for handling hard and soft interrupts. This can help avoid
330 overflowing the process kernel stacks.
333 bool "Use page table locks in TLB fault handler"
337 Select this option to enable page table locking in the TLB
338 fault handler. This ensures that page table entries are
339 updated consistently on SMP machines at the expense of some
346 config ARCH_SELECT_MEMORY_MODEL
350 config ARCH_SPARSEMEM_ENABLE
354 config ARCH_FLATMEM_ENABLE
357 config ARCH_SPARSEMEM_DEFAULT
359 depends on ARCH_SPARSEMEM_ENABLE
361 source "kernel/Kconfig.hz"
367 config SYSVIPC_COMPAT
369 depends on COMPAT && SYSVIPC
375 int "Maximum number of CPUs (2-32)"
381 bool "Kexec system call"
384 kexec is a system call that implements the ability to shutdown your
385 current kernel, and to start another kernel. It is like a reboot
386 but it is independent of the system firmware. And like a reboot
387 you can start any kernel with it, not just Linux.
389 It is an ongoing process to be certain the hardware in a machine
390 shutdown, so do not be surprised if this code does not
391 initially work for you.
394 bool "kexec file based system call"
398 This enables the kexec_file_load() System call. This is
399 file based and takes file descriptors as system call argument
400 for kernel and initramfs as opposed to list of segments as
401 accepted by previous system call.
405 source "drivers/parisc/Kconfig"