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>.
88 config GENERIC_LOCKBREAK
91 depends on SMP && PREEMPTION
93 config ARCH_HAS_ILOG2_U32
97 config ARCH_HAS_ILOG2_U64
106 config GENERIC_HWEIGHT
110 config GENERIC_CALIBRATE_DELAY
119 # unless you want to implement ACPI on PA-RISC ... ;-)
123 config STACKTRACE_SUPPORT
129 config ARCH_MAY_HAVE_PC_FDC
134 config PGTABLE_LEVELS
136 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
139 menu "Processor type and features"
142 prompt "Processor type"
148 This is the processor type of your CPU. This information is
149 used for optimizing purposes. In order to compile a kernel
150 that can run on all 32-bit PA CPUs (albeit not optimally fast),
151 you can specify "PA7000" here.
153 Specifying "PA8000" here will allow you to select a 64-bit kernel
154 which is required on some machines.
159 Select this option for the PCX-L processor, as used in the
160 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
161 D200, D210, D300, D310 and E-class
166 Select this option for the PCX-T' processor, as used in the
167 C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
168 K100, K200, K210, K220, K400, K410 and K420
173 Select this option for the PCX-L2 processor, as used in the
174 744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
175 D220, D230, D320 and D330.
180 Select this option for PCX-U to PCX-W2 processors.
184 # Define implied options from the CPU selection here
192 depends on PA7000 || PA7100LC || PA7200 || PA7300LC
193 select ARCH_HAS_SYNC_DMA_FOR_CPU
194 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
198 depends on PA8X00 || PA7200
200 config PARISC_HUGE_KERNEL
201 def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
204 def_bool y if PARISC_HUGE_KERNEL
205 bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
208 If you configure the kernel to include many drivers built-in instead
209 as modules, the kernel executable may become too big, so that the
210 linker will not be able to resolve some long branches and fails to link
211 your vmlinux kernel. In that case enabling this option will help you
212 to overcome this limit by using the -mlong-calls compiler option.
214 Usually you want to say N here, unless you e.g. want to build
215 a kernel which includes all necessary drivers built-in and which can
216 be used for TFTP booting without the need to have an initrd ramdisk.
218 Enabling this option will probably slow down your kernel.
224 Enable this if you want to support 64bit kernel on PA-RISC platform.
226 At the moment, only people willing to use more than 2GB of RAM,
227 or having a 64bit-only capable PA-RISC machine should say Y here.
229 Since there is no 64bit userland on PA-RISC, there is no point to
230 enable this option otherwise. The 64bit kernel is significantly bigger
231 and slower than the 32bit one.
234 prompt "Kernel page size"
235 default PARISC_PAGE_SIZE_4KB
237 config PARISC_PAGE_SIZE_4KB
240 This lets you select the page size of the kernel. For best
241 performance, a page size of 16KB is recommended. For best
242 compatibility with 32bit applications, a page size of 4KB should be
243 selected (the vast majority of 32bit binaries work perfectly fine
244 with a larger page size).
246 4KB For best 32bit compatibility
247 16KB For best performance
248 64KB For best performance, might give more overhead.
250 If you don't know what to do, choose 4KB.
252 config PARISC_PAGE_SIZE_16KB
254 depends on PA8X00 && BROKEN && !KFENCE
256 config PARISC_PAGE_SIZE_64KB
258 depends on PA8X00 && BROKEN && !KFENCE
262 config PARISC_SELF_EXTRACT
263 bool "Build kernel as self-extracting executable"
266 Say Y if you want to build the parisc kernel as a kind of
267 self-extracting executable.
269 If you say N here, the kernel will be compressed with gzip
270 which can be loaded by the palo bootloader directly too.
272 If you don't know what to do here, say Y.
275 bool "Symmetric multi-processing support"
277 This enables support for systems with more than one CPU. If you have
278 a system with only one CPU, say N. If you have a system with more
281 If you say N here, the kernel will run on uni- and multiprocessor
282 machines, but will use only one CPU of a multiprocessor machine.
283 On a uniprocessor machine, the kernel will run faster if you say N.
285 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
286 available at <https://www.tldp.org/docs.html#howto>.
288 If you don't know what to do here, say N.
290 config PARISC_CPU_TOPOLOGY
291 bool "Support cpu topology definition"
295 Support PARISC cpu topology definition.
298 bool "Multi-core scheduler support"
299 depends on PARISC_CPU_TOPOLOGY && PA8X00
301 Multi-core scheduler support improves the CPU scheduler's decision
302 making when dealing with multi-core CPU chips at a cost of slightly
303 increased overhead in some places. If unsure say N here.
306 bool "Use separate kernel stacks when processing interrupts"
309 If you say Y here the kernel will use separate kernel stacks
310 for handling hard and soft interrupts. This can help avoid
311 overflowing the process kernel stacks.
314 bool "Use page table locks in TLB fault handler"
318 Select this option to enable page table locking in the TLB
319 fault handler. This ensures that page table entries are
320 updated consistently on SMP machines at the expense of some
327 config ARCH_SELECT_MEMORY_MODEL
331 config ARCH_SPARSEMEM_ENABLE
335 config ARCH_FLATMEM_ENABLE
338 config ARCH_SPARSEMEM_DEFAULT
340 depends on ARCH_SPARSEMEM_ENABLE
342 source "kernel/Kconfig.hz"
348 config SYSVIPC_COMPAT
350 depends on COMPAT && SYSVIPC
356 int "Maximum number of CPUs (2-32)"
363 bool "Kexec system call"
366 kexec is a system call that implements the ability to shutdown your
367 current kernel, and to start another kernel. It is like a reboot
368 but it is independent of the system firmware. And like a reboot
369 you can start any kernel with it, not just Linux.
371 It is an ongoing process to be certain the hardware in a machine
372 shutdown, so do not be surprised if this code does not
373 initially work for you.
376 bool "kexec file based system call"
380 This enables the kexec_file_load() System call. This is
381 file based and takes file descriptors as system call argument
382 for kernel and initramfs as opposed to list of segments as
383 accepted by previous system call.
387 source "drivers/parisc/Kconfig"