1 # SPDX-License-Identifier: GPL-2.0
4 select ALTERNATE_USER_ADDRESS_SPACE
5 select ARCH_32BIT_OFF_T if !64BIT
6 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_HAS_PTE_SPECIAL
15 select ARCH_NO_SG_CHAIN
16 select ARCH_SUPPORTS_HUGETLBFS if PA20
17 select ARCH_SUPPORTS_MEMORY_FAILURE
19 select ARCH_HAS_DEBUG_VM_PGTABLE
20 select HAVE_RELIABLE_STACKTRACE
23 select RTC_DRV_GENERIC
24 select INIT_ALL_POSSIBLE
26 select BUILDTIME_TABLE_SORT
28 select HAVE_PERF_EVENTS
29 select HAVE_KERNEL_BZIP2
30 select HAVE_KERNEL_GZIP
31 select HAVE_KERNEL_LZ4
32 select HAVE_KERNEL_LZMA
33 select HAVE_KERNEL_LZO
35 select GENERIC_ATOMIC64 if !64BIT
36 select GENERIC_IRQ_PROBE
37 select GENERIC_PCI_IOMAP
38 select ARCH_HAVE_NMI_SAFE_CMPXCHG
39 select GENERIC_SMP_IDLE_THREAD
40 select GENERIC_CPU_DEVICES
41 select GENERIC_LIB_DEVMEM_IS_ALLOWED
42 select SYSCTL_ARCH_UNALIGN_ALLOW
43 select SYSCTL_EXCEPTION_TRACE
44 select HAVE_MOD_ARCH_SPECIFIC
46 select MODULES_USE_ELF_RELA
47 select CLONE_BACKWARDS
48 select TTY # Needed for pdc_cons.c
49 select HAVE_DEBUG_STACKOVERFLOW
50 select HAVE_ARCH_AUDITSYSCALL
52 select HAVE_ARCH_JUMP_LABEL
53 select HAVE_ARCH_JUMP_LABEL_RELATIVE
54 select HAVE_ARCH_KFENCE
55 select HAVE_ARCH_SECCOMP_FILTER
56 select HAVE_ARCH_TRACEHOOK
57 select HAVE_REGS_AND_STACK_ACCESS_API
58 select GENERIC_SCHED_CLOCK
59 select HAVE_UNSTABLE_SCHED_CLOCK if SMP
60 select LEGACY_TIMER_TICK
61 select CPU_NO_EFFICIENT_FFS
62 select THREAD_INFO_IN_TASK
63 select NEED_DMA_MAP_STATE
64 select NEED_SG_DMA_LENGTH
67 select HAVE_KRETPROBES
68 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
69 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
70 select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
71 select HAVE_KPROBES_ON_FTRACE
72 select HAVE_DYNAMIC_FTRACE_WITH_REGS
73 select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
74 select TRACE_IRQFLAGS_SUPPORT
77 The PA-RISC microprocessor is designed by Hewlett-Packard and used
78 in many of their workstations & servers (HP9000 700 and 800 series,
79 and later HP3000 series). The PA-RISC Linux project home page is
80 at <https://parisc.wiki.kernel.org>.
91 config GENERIC_LOCKBREAK
94 depends on SMP && PREEMPTION
96 config ARCH_HAS_ILOG2_U32
100 config ARCH_HAS_ILOG2_U64
109 config GENERIC_HWEIGHT
113 config GENERIC_CALIBRATE_DELAY
122 # unless you want to implement ACPI on PA-RISC ... ;-)
126 config STACKTRACE_SUPPORT
132 config ARCH_MAY_HAVE_PC_FDC
137 config PGTABLE_LEVELS
139 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
142 menu "Processor type and features"
145 prompt "Processor type"
151 This is the processor type of your CPU. This information is
152 used for optimizing purposes. In order to compile a kernel
153 that can run on all 32-bit PA CPUs (albeit not optimally fast),
154 you can specify "PA7000" here.
156 Specifying "PA8000" here will allow you to select a 64-bit kernel
157 which is required on some machines.
162 Select this option for the PCX-L processor, as used in the
163 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
164 D200, D210, D300, D310 and E-class
169 Select this option for the PCX-T' processor, as used in the
170 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
171 K100, K200, K210, K220, K400, K410 and K420
176 Select this option for the PCX-L2 processor, as used in the
177 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
178 D220, D230, D320 and D330.
183 Select this option for PCX-U to PCX-W2 processors.
187 # Define implied options from the CPU selection here
195 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
196 select ARCH_HAS_SYNC_DMA_FOR_CPU
197 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
201 depends on PA8X00 || PA7200
203 config PARISC_HUGE_KERNEL
204 def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
207 def_bool y if PARISC_HUGE_KERNEL
208 bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
211 If you configure the kernel to include many drivers built-in instead
212 as modules, the kernel executable may become too big, so that the
213 linker will not be able to resolve some long branches and fails to link
214 your vmlinux kernel. In that case enabling this option will help you
215 to overcome this limit by using the -mlong-calls compiler option.
217 Usually you want to say N here, unless you e.g. want to build
218 a kernel which includes all necessary drivers built-in and which can
219 be used for TFTP booting without the need to have an initrd ramdisk.
221 Enabling this option will probably slow down your kernel.
227 Enable this if you want to support 64bit kernel on PA-RISC platform.
229 At the moment, only people willing to use more than 2GB of RAM,
230 or having a 64bit-only capable PA-RISC machine should say Y here.
232 Since there is no 64bit userland on PA-RISC, there is no point to
233 enable this option otherwise. The 64bit kernel is significantly bigger
234 and slower than the 32bit one.
237 prompt "Kernel page size"
238 default PARISC_PAGE_SIZE_4KB
240 config PARISC_PAGE_SIZE_4KB
243 This lets you select the page size of the kernel. For best
244 performance, a page size of 16KB is recommended. For best
245 compatibility with 32bit applications, a page size of 4KB should be
246 selected (the vast majority of 32bit binaries work perfectly fine
247 with a larger page size).
249 4KB For best 32bit compatibility
250 16KB For best performance
251 64KB For best performance, might give more overhead.
253 If you don't know what to do, choose 4KB.
255 config PARISC_PAGE_SIZE_16KB
257 depends on PA8X00 && BROKEN && !KFENCE
259 config PARISC_PAGE_SIZE_64KB
261 depends on PA8X00 && BROKEN && !KFENCE
266 bool "Symmetric multi-processing support"
268 This enables support for systems with more than one CPU. If you have
269 a system with only one CPU, say N. If you have a system with more
272 If you say N here, the kernel will run on uni- and multiprocessor
273 machines, but will use only one CPU of a multiprocessor machine.
274 On a uniprocessor machine, the kernel will run faster if you say N.
276 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
277 available at <https://www.tldp.org/docs.html#howto>.
279 If you don't know what to do here, say N.
281 config PARISC_CPU_TOPOLOGY
282 bool "Support cpu topology definition"
286 Support PARISC cpu topology definition.
289 bool "Multi-core scheduler support"
290 depends on PARISC_CPU_TOPOLOGY && PA8X00
292 Multi-core scheduler support improves the CPU scheduler's decision
293 making when dealing with multi-core CPU chips at a cost of slightly
294 increased overhead in some places. If unsure say N here.
297 bool "Use separate kernel stacks when processing interrupts"
300 If you say Y here the kernel will use separate kernel stacks
301 for handling hard and soft interrupts. This can help avoid
302 overflowing the process kernel stacks.
305 bool "Use page table locks in TLB fault handler"
309 Select this option to enable page table locking in the TLB
310 fault handler. This ensures that page table entries are
311 updated consistently on SMP machines at the expense of some
318 config ARCH_SELECT_MEMORY_MODEL
322 config ARCH_SPARSEMEM_ENABLE
326 config ARCH_FLATMEM_ENABLE
329 config ARCH_SPARSEMEM_DEFAULT
331 depends on ARCH_SPARSEMEM_ENABLE
333 source "kernel/Kconfig.hz"
339 config SYSVIPC_COMPAT
341 depends on COMPAT && SYSVIPC
347 int "Maximum number of CPUs (2-32)"
354 bool "Kexec system call"
357 kexec is a system call that implements the ability to shutdown your
358 current kernel, and to start another kernel. It is like a reboot
359 but it is independent of the system firmware. And like a reboot
360 you can start any kernel with it, not just Linux.
362 It is an ongoing process to be certain the hardware in a machine
363 shutdown, so do not be surprised if this code does not
364 initially work for you.
367 bool "kexec file based system call"
371 This enables the kexec_file_load() System call. This is
372 file based and takes file descriptors as system call argument
373 for kernel and initramfs as opposed to list of segments as
374 accepted by previous system call.
378 source "drivers/parisc/Kconfig"