1# SPDX-License-Identifier: GPL-2.0 2config PARISC 3 def_bool y 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_STRICT_MODULE_RWX 14 select ARCH_HAS_UBSAN_SANITIZE_ALL 15 select ARCH_HAS_PTE_SPECIAL 16 select ARCH_NO_SG_CHAIN 17 select ARCH_SUPPORTS_HUGETLBFS if PA20 18 select ARCH_SUPPORTS_MEMORY_FAILURE 19 select ARCH_STACKWALK 20 select ARCH_HAS_DEBUG_VM_PGTABLE 21 select HAVE_RELIABLE_STACKTRACE 22 select DMA_OPS 23 select RTC_CLASS 24 select RTC_DRV_GENERIC 25 select INIT_ALL_POSSIBLE 26 select BUG 27 select BUILDTIME_TABLE_SORT 28 select HAVE_PCI 29 select HAVE_PERF_EVENTS 30 select HAVE_KERNEL_BZIP2 31 select HAVE_KERNEL_GZIP 32 select HAVE_KERNEL_LZ4 33 select HAVE_KERNEL_LZMA 34 select HAVE_KERNEL_LZO 35 select HAVE_KERNEL_XZ 36 select GENERIC_ATOMIC64 if !64BIT 37 select GENERIC_IRQ_PROBE 38 select GENERIC_PCI_IOMAP 39 select ARCH_HAVE_NMI_SAFE_CMPXCHG 40 select GENERIC_SMP_IDLE_THREAD 41 select GENERIC_ARCH_TOPOLOGY if SMP 42 select GENERIC_CPU_DEVICES if !SMP 43 select GENERIC_LIB_DEVMEM_IS_ALLOWED 44 select SYSCTL_ARCH_UNALIGN_ALLOW 45 select SYSCTL_EXCEPTION_TRACE 46 select HAVE_MOD_ARCH_SPECIFIC 47 select MODULES_USE_ELF_RELA 48 select CLONE_BACKWARDS 49 select TTY # Needed for pdc_cons.c 50 select HAS_IOPORT if PCI || EISA 51 select HAVE_DEBUG_STACKOVERFLOW 52 select HAVE_ARCH_AUDITSYSCALL 53 select HAVE_ARCH_HASH 54 select HAVE_ARCH_JUMP_LABEL 55 select HAVE_ARCH_JUMP_LABEL_RELATIVE 56 select HAVE_ARCH_KFENCE 57 select HAVE_ARCH_SECCOMP_FILTER 58 select HAVE_ARCH_TRACEHOOK 59 select HAVE_REGS_AND_STACK_ACCESS_API 60 select GENERIC_SCHED_CLOCK 61 select GENERIC_IRQ_MIGRATION if SMP 62 select HAVE_UNSTABLE_SCHED_CLOCK if SMP 63 select LEGACY_TIMER_TICK 64 select CPU_NO_EFFICIENT_FFS 65 select THREAD_INFO_IN_TASK 66 select NEED_DMA_MAP_STATE 67 select NEED_SG_DMA_LENGTH 68 select HAVE_ARCH_KGDB 69 select HAVE_KPROBES 70 select HAVE_KRETPROBES 71 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1) 72 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE 73 select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE 74 select HAVE_KPROBES_ON_FTRACE 75 select HAVE_DYNAMIC_FTRACE_WITH_REGS 76 select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS 77 select TRACE_IRQFLAGS_SUPPORT 78 select HAVE_FUNCTION_DESCRIPTORS if 64BIT 79 80 help 81 The PA-RISC microprocessor is designed by Hewlett-Packard and used 82 in many of their workstations & servers (HP9000 700 and 800 series, 83 and later HP3000 series). The PA-RISC Linux project home page is 84 at <https://parisc.wiki.kernel.org>. 85 86config CPU_BIG_ENDIAN 87 def_bool y 88 89config MMU 90 def_bool y 91 92config STACK_GROWSUP 93 def_bool y 94 95config GENERIC_LOCKBREAK 96 bool 97 default y 98 depends on SMP && PREEMPTION 99 100config ARCH_HAS_ILOG2_U32 101 bool 102 default n 103 104config ARCH_HAS_ILOG2_U64 105 bool 106 default n 107 108config GENERIC_BUG 109 bool 110 default y 111 depends on BUG 112 113config GENERIC_HWEIGHT 114 bool 115 default y 116 117config GENERIC_CALIBRATE_DELAY 118 bool 119 default y 120 121config TIME_LOW_RES 122 bool 123 depends on SMP 124 default y 125 126# unless you want to implement ACPI on PA-RISC ... ;-) 127config PM 128 bool 129 130config STACKTRACE_SUPPORT 131 def_bool y 132 133config ISA_DMA_API 134 bool 135 136config ARCH_MAY_HAVE_PC_FDC 137 bool 138 depends on BROKEN 139 default y 140 141config PGTABLE_LEVELS 142 int 143 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB 144 default 2 145 146menu "Processor type and features" 147 148choice 149 prompt "Processor type" 150 default PA7000 if "$(ARCH)" = "parisc" 151 152config PA7000 153 bool "PA7000/PA7100" if "$(ARCH)" = "parisc" 154 help 155 This is the processor type of your CPU. This information is 156 used for optimizing purposes. In order to compile a kernel 157 that can run on all 32-bit PA CPUs (albeit not optimally fast), 158 you can specify "PA7000" here. 159 160 Specifying "PA8000" here will allow you to select a 64-bit kernel 161 which is required on some machines. 162 163config PA7100LC 164 bool "PA7100LC" if "$(ARCH)" = "parisc" 165 help 166 Select this option for the PCX-L processor, as used in the 167 712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748, 168 D200, D210, D300, D310 and E-class 169 170config PA7200 171 bool "PA7200" if "$(ARCH)" = "parisc" 172 help 173 Select this option for the PCX-T' processor, as used in the 174 C100, C110, J100, J110, J210XC, D250, D260, D350, D360, 175 K100, K200, K210, K220, K400, K410 and K420 176 177config PA7300LC 178 bool "PA7300LC" if "$(ARCH)" = "parisc" 179 help 180 Select this option for the PCX-L2 processor, as used in the 181 744, A180, B132L, B160L, B180L, C132L, C160L, C180L, 182 D220, D230, D320 and D330. 183 184config PA8X00 185 bool "PA8000 and up" 186 help 187 Select this option for PCX-U to PCX-W2 processors. 188 189endchoice 190 191# Define implied options from the CPU selection here 192 193config PA20 194 def_bool y 195 depends on PA8X00 196 197config PA11 198 def_bool y 199 depends on PA7000 || PA7100LC || PA7200 || PA7300LC 200 select ARCH_HAS_SYNC_DMA_FOR_CPU 201 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 202 203config PREFETCH 204 def_bool y 205 depends on PA8X00 || PA7200 206 207config PARISC_HUGE_KERNEL 208 def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST 209 210config MLONGCALLS 211 def_bool y if PARISC_HUGE_KERNEL 212 bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL 213 depends on PA8X00 214 help 215 If you configure the kernel to include many drivers built-in instead 216 as modules, the kernel executable may become too big, so that the 217 linker will not be able to resolve some long branches and fails to link 218 your vmlinux kernel. In that case enabling this option will help you 219 to overcome this limit by using the -mlong-calls compiler option. 220 221 Usually you want to say N here, unless you e.g. want to build 222 a kernel which includes all necessary drivers built-in and which can 223 be used for TFTP booting without the need to have an initrd ramdisk. 224 225 Enabling this option will probably slow down your kernel. 226 227config 64BIT 228 def_bool y if "$(ARCH)" = "parisc64" 229 bool "64-bit kernel" if "$(ARCH)" = "parisc" 230 depends on PA8X00 231 help 232 Enable this if you want to support 64bit kernel on PA-RISC platform. 233 234 At the moment, only people willing to use more than 2GB of RAM, 235 or having a 64bit-only capable PA-RISC machine should say Y here. 236 237 Since there is no 64bit userland on PA-RISC, there is no point to 238 enable this option otherwise. The 64bit kernel is significantly bigger 239 and slower than the 32bit one. 240 241choice 242 prompt "Kernel page size" 243 default PARISC_PAGE_SIZE_4KB 244 245config PARISC_PAGE_SIZE_4KB 246 bool "4KB" 247 help 248 This lets you select the page size of the kernel. For best 249 performance, a page size of 16KB is recommended. For best 250 compatibility with 32bit applications, a page size of 4KB should be 251 selected (the vast majority of 32bit binaries work perfectly fine 252 with a larger page size). 253 254 4KB For best 32bit compatibility 255 16KB For best performance 256 64KB For best performance, might give more overhead. 257 258 If you don't know what to do, choose 4KB. 259 260config PARISC_PAGE_SIZE_16KB 261 bool "16KB" 262 depends on PA8X00 && BROKEN && !KFENCE 263 264config PARISC_PAGE_SIZE_64KB 265 bool "64KB" 266 depends on PA8X00 && BROKEN && !KFENCE 267 268endchoice 269 270config SMP 271 bool "Symmetric multi-processing support" 272 help 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 275 than one CPU, say Y. 276 277 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. 280 281 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 282 available at <https://www.tldp.org/docs.html#howto>. 283 284 If you don't know what to do here, say N. 285 286config SCHED_MC 287 bool "Multi-core scheduler support" 288 depends on GENERIC_ARCH_TOPOLOGY && PA8X00 289 help 290 Multi-core scheduler support improves the CPU scheduler's decision 291 making when dealing with multi-core CPU chips at a cost of slightly 292 increased overhead in some places. If unsure say N here. 293 294config IRQSTACKS 295 bool "Use separate kernel stacks when processing interrupts" 296 default y 297 help 298 If you say Y here the kernel will use separate kernel stacks 299 for handling hard and soft interrupts. This can help avoid 300 overflowing the process kernel stacks. 301 302config TLB_PTLOCK 303 bool "Use page table locks in TLB fault handler" 304 depends on SMP 305 default n 306 help 307 Select this option to enable page table locking in the TLB 308 fault handler. This ensures that page table entries are 309 updated consistently on SMP machines at the expense of some 310 loss in performance. 311 312config HOTPLUG_CPU 313 bool 314 default y if SMP 315 316config ARCH_SELECT_MEMORY_MODEL 317 def_bool y 318 depends on 64BIT 319 320config ARCH_SPARSEMEM_ENABLE 321 def_bool y 322 depends on 64BIT 323 324config ARCH_FLATMEM_ENABLE 325 def_bool y 326 327config ARCH_SPARSEMEM_DEFAULT 328 def_bool y 329 depends on ARCH_SPARSEMEM_ENABLE 330 331source "kernel/Kconfig.hz" 332 333config COMPAT 334 def_bool y 335 depends on 64BIT 336 337config AUDIT_ARCH 338 def_bool y 339 340config NR_CPUS 341 int "Maximum number of CPUs (2-32)" 342 range 2 32 343 depends on SMP 344 default "4" if 64BIT 345 default "16" 346 347config KEXEC 348 bool "Kexec system call" 349 select KEXEC_CORE 350 help 351 kexec is a system call that implements the ability to shutdown your 352 current kernel, and to start another kernel. It is like a reboot 353 but it is independent of the system firmware. And like a reboot 354 you can start any kernel with it, not just Linux. 355 356 It is an ongoing process to be certain the hardware in a machine 357 shutdown, so do not be surprised if this code does not 358 initially work for you. 359 360config KEXEC_FILE 361 bool "kexec file based system call" 362 select KEXEC_CORE 363 select KEXEC_ELF 364 help 365 This enables the kexec_file_load() System call. This is 366 file based and takes file descriptors as system call argument 367 for kernel and initramfs as opposed to list of segments as 368 accepted by previous system call. 369 370endmenu 371 372source "drivers/parisc/Kconfig" 373