tjh.dev / kernel
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kernel / arch / parisc / Kconfig
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1# SPDX-License-Identifier: GPL-2.0 2config PARISC 3 def_bool y 4 select ARCH_32BIT_OFF_T if !64BIT 5 select ARCH_MIGHT_HAVE_PC_PARPORT 6 select HAVE_IDE 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_NO_SG_CHAIN 15 select ARCH_SUPPORTS_HUGETLBFS if PA20 16 select ARCH_SUPPORTS_MEMORY_FAILURE 17 select DMA_OPS 18 select RTC_CLASS 19 select RTC_DRV_GENERIC 20 select INIT_ALL_POSSIBLE 21 select BUG 22 select BUILDTIME_TABLE_SORT 23 select HAVE_PCI 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 30 select HAVE_KERNEL_XZ 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 GENERIC_LIB_DEVMEM_IS_ALLOWED 39 select SYSCTL_ARCH_UNALIGN_ALLOW 40 select SYSCTL_EXCEPTION_TRACE 41 select HAVE_MOD_ARCH_SPECIFIC 42 select VIRT_TO_BUS 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 48 select HAVE_ARCH_HASH 49 select HAVE_ARCH_JUMP_LABEL 50 select HAVE_ARCH_JUMP_LABEL_RELATIVE 51 select HAVE_ARCH_SECCOMP_FILTER 52 select HAVE_ARCH_TRACEHOOK 53 select HAVE_REGS_AND_STACK_ACCESS_API 54 select GENERIC_SCHED_CLOCK 55 select HAVE_UNSTABLE_SCHED_CLOCK if SMP 56 select LEGACY_TIMER_TICK 57 select CPU_NO_EFFICIENT_FFS 58 select NEED_DMA_MAP_STATE 59 select NEED_SG_DMA_LENGTH 60 select HAVE_ARCH_KGDB 61 select HAVE_KPROBES 62 select HAVE_KRETPROBES 63 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1) 64 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE 65 select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE 66 select HAVE_KPROBES_ON_FTRACE 67 select HAVE_DYNAMIC_FTRACE_WITH_REGS 68 select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS 69 select SET_FS 70 71 help 72 The PA-RISC microprocessor is designed by Hewlett-Packard and used 73 in many of their workstations & servers (HP9000 700 and 800 series, 74 and later HP3000 series). The PA-RISC Linux project home page is 75 at <https://parisc.wiki.kernel.org>. 76 77config CPU_BIG_ENDIAN 78 def_bool y 79 80config MMU 81 def_bool y 82 83config STACK_GROWSUP 84 def_bool y 85 86config ARCH_DEFCONFIG 87 string 88 default "arch/parisc/configs/generic-32bit_defconfig" if !64BIT 89 default "arch/parisc/configs/generic-64bit_defconfig" if 64BIT 90 91config GENERIC_LOCKBREAK 92 bool 93 default y 94 depends on SMP && PREEMPTION 95 96config ARCH_HAS_ILOG2_U32 97 bool 98 default n 99 100config ARCH_HAS_ILOG2_U64 101 bool 102 default n 103 104config GENERIC_BUG 105 bool 106 default y 107 depends on BUG 108 109config GENERIC_HWEIGHT 110 bool 111 default y 112 113config GENERIC_CALIBRATE_DELAY 114 bool 115 default y 116 117config TIME_LOW_RES 118 bool 119 depends on SMP 120 default y 121 122# unless you want to implement ACPI on PA-RISC ... ;-) 123config PM 124 bool 125 126config STACKTRACE_SUPPORT 127 def_bool y 128 129config ISA_DMA_API 130 bool 131 132config ARCH_MAY_HAVE_PC_FDC 133 bool 134 depends on BROKEN 135 default y 136 137config PGTABLE_LEVELS 138 int 139 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB 140 default 2 141 142menu "Processor type and features" 143 144choice 145 prompt "Processor type" 146 default PA7000 147 148config PA7000 149 bool "PA7000/PA7100" 150 help 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. 155 156 Specifying "PA8000" here will allow you to select a 64-bit kernel 157 which is required on some machines. 158 159config PA7100LC 160 bool "PA7100LC" 161 help 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 165 166config PA7200 167 bool "PA7200" 168 help 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 172 173config PA7300LC 174 bool "PA7300LC" 175 help 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. 179 180config PA8X00 181 bool "PA8000 and up" 182 help 183 Select this option for PCX-U to PCX-W2 processors. 184 185endchoice 186 187# Define implied options from the CPU selection here 188 189config PA20 190 def_bool y 191 depends on PA8X00 192 193config PA11 194 def_bool y 195 depends on PA7000 || PA7100LC || PA7200 || PA7300LC 196 select ARCH_HAS_SYNC_DMA_FOR_CPU 197 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 198 199config PREFETCH 200 def_bool y 201 depends on PA8X00 || PA7200 202 203config PARISC_HUGE_KERNEL 204 def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST 205 206config MLONGCALLS 207 def_bool y if PARISC_HUGE_KERNEL 208 bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL 209 depends on PA8X00 210 help 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. 216 217 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. 220 221 Enabling this option will probably slow down your kernel. 222 223config 64BIT 224 bool "64-bit kernel" 225 depends on PA8X00 226 help 227 Enable this if you want to support 64bit kernel on PA-RISC platform. 228 229 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. 231 232 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. 235 236choice 237 prompt "Kernel page size" 238 default PARISC_PAGE_SIZE_4KB 239 240config PARISC_PAGE_SIZE_4KB 241 bool "4KB" 242 help 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). 248 249 4KB For best 32bit compatibility 250 16KB For best performance 251 64KB For best performance, might give more overhead. 252 253 If you don't know what to do, choose 4KB. 254 255config PARISC_PAGE_SIZE_16KB 256 bool "16KB" 257 depends on PA8X00 && BROKEN 258 259config PARISC_PAGE_SIZE_64KB 260 bool "64KB" 261 depends on PA8X00 && BROKEN 262 263endchoice 264 265config PARISC_SELF_EXTRACT 266 bool "Build kernel as self-extracting executable" 267 default y 268 help 269 Say Y if you want to build the parisc kernel as a kind of 270 self-extracting executable. 271 272 If you say N here, the kernel will be compressed with gzip 273 which can be loaded by the palo bootloader directly too. 274 275 If you don't know what to do here, say Y. 276 277config SMP 278 bool "Symmetric multi-processing support" 279 help 280 This enables support for systems with more than one CPU. If you have 281 a system with only one CPU, say N. If you have a system with more 282 than one CPU, say Y. 283 284 If you say N here, the kernel will run on uni- and multiprocessor 285 machines, but will use only one CPU of a multiprocessor machine. 286 On a uniprocessor machine, the kernel will run faster if you say N. 287 288 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 289 available at <https://www.tldp.org/docs.html#howto>. 290 291 If you don't know what to do here, say N. 292 293config PARISC_CPU_TOPOLOGY 294 bool "Support cpu topology definition" 295 depends on SMP 296 default y 297 help 298 Support PARISC cpu topology definition. 299 300config SCHED_MC 301 bool "Multi-core scheduler support" 302 depends on PARISC_CPU_TOPOLOGY && PA8X00 303 help 304 Multi-core scheduler support improves the CPU scheduler's decision 305 making when dealing with multi-core CPU chips at a cost of slightly 306 increased overhead in some places. If unsure say N here. 307 308config IRQSTACKS 309 bool "Use separate kernel stacks when processing interrupts" 310 default y 311 help 312 If you say Y here the kernel will use separate kernel stacks 313 for handling hard and soft interrupts. This can help avoid 314 overflowing the process kernel stacks. 315 316config TLB_PTLOCK 317 bool "Use page table locks in TLB fault handler" 318 depends on SMP 319 default n 320 help 321 Select this option to enable page table locking in the TLB 322 fault handler. This ensures that page table entries are 323 updated consistently on SMP machines at the expense of some 324 loss in performance. 325 326config HOTPLUG_CPU 327 bool 328 default y if SMP 329 330config ARCH_SELECT_MEMORY_MODEL 331 def_bool y 332 depends on 64BIT 333 334config ARCH_SPARSEMEM_ENABLE 335 def_bool y 336 depends on 64BIT 337 338config ARCH_FLATMEM_ENABLE 339 def_bool y 340 341config ARCH_SPARSEMEM_DEFAULT 342 def_bool y 343 depends on ARCH_SPARSEMEM_ENABLE 344 345source "kernel/Kconfig.hz" 346 347config COMPAT 348 def_bool y 349 depends on 64BIT 350 351config SYSVIPC_COMPAT 352 def_bool y 353 depends on COMPAT && SYSVIPC 354 355config AUDIT_ARCH 356 def_bool y 357 358config NR_CPUS 359 int "Maximum number of CPUs (2-32)" 360 range 2 32 361 depends on SMP 362 default "4" 363 364config KEXEC 365 bool "Kexec system call" 366 select KEXEC_CORE 367 help 368 kexec is a system call that implements the ability to shutdown your 369 current kernel, and to start another kernel. It is like a reboot 370 but it is independent of the system firmware. And like a reboot 371 you can start any kernel with it, not just Linux. 372 373 It is an ongoing process to be certain the hardware in a machine 374 shutdown, so do not be surprised if this code does not 375 initially work for you. 376 377config KEXEC_FILE 378 bool "kexec file based system call" 379 select KEXEC_CORE 380 select KEXEC_ELF 381 help 382 This enables the kexec_file_load() System call. This is 383 file based and takes file descriptors as system call argument 384 for kernel and initramfs as opposed to list of segments as 385 accepted by previous system call. 386 387endmenu 388 389source "drivers/firmware/Kconfig" 390 391source "drivers/parisc/Kconfig"