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_OPROFILE 8 select HAVE_FUNCTION_TRACER 9 select HAVE_FUNCTION_GRAPH_TRACER 10 select HAVE_SYSCALL_TRACEPOINTS 11 select ARCH_WANT_FRAME_POINTERS 12 select ARCH_HAS_ELF_RANDOMIZE 13 select ARCH_HAS_STRICT_KERNEL_RWX 14 select ARCH_HAS_UBSAN_SANITIZE_ALL 15 select ARCH_NO_SG_CHAIN 16 select ARCH_SUPPORTS_MEMORY_FAILURE 17 select RTC_CLASS 18 select RTC_DRV_GENERIC 19 select INIT_ALL_POSSIBLE 20 select BUG 21 select BUILDTIME_TABLE_SORT 22 select HAVE_PCI 23 select HAVE_PERF_EVENTS 24 select HAVE_KERNEL_BZIP2 25 select HAVE_KERNEL_GZIP 26 select HAVE_KERNEL_LZ4 27 select HAVE_KERNEL_LZMA 28 select HAVE_KERNEL_LZO 29 select HAVE_KERNEL_XZ 30 select GENERIC_ATOMIC64 if !64BIT 31 select GENERIC_IRQ_PROBE 32 select GENERIC_PCI_IOMAP 33 select ARCH_HAVE_NMI_SAFE_CMPXCHG 34 select GENERIC_SMP_IDLE_THREAD 35 select GENERIC_CPU_DEVICES 36 select GENERIC_STRNCPY_FROM_USER 37 select SYSCTL_ARCH_UNALIGN_ALLOW 38 select SYSCTL_EXCEPTION_TRACE 39 select HAVE_MOD_ARCH_SPECIFIC 40 select VIRT_TO_BUS 41 select MODULES_USE_ELF_RELA 42 select CLONE_BACKWARDS 43 select TTY # Needed for pdc_cons.c 44 select HAVE_DEBUG_STACKOVERFLOW 45 select HAVE_ARCH_AUDITSYSCALL 46 select HAVE_ARCH_HASH 47 select HAVE_ARCH_JUMP_LABEL 48 select HAVE_ARCH_JUMP_LABEL_RELATIVE 49 select HAVE_ARCH_SECCOMP_FILTER 50 select HAVE_ARCH_TRACEHOOK 51 select HAVE_REGS_AND_STACK_ACCESS_API 52 select GENERIC_SCHED_CLOCK 53 select HAVE_UNSTABLE_SCHED_CLOCK if SMP 54 select GENERIC_CLOCKEVENTS 55 select CPU_NO_EFFICIENT_FFS 56 select NEED_DMA_MAP_STATE 57 select NEED_SG_DMA_LENGTH 58 select HAVE_ARCH_KGDB 59 select HAVE_KPROBES 60 select HAVE_KRETPROBES 61 select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1) 62 select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE 63 select HAVE_KPROBES_ON_FTRACE 64 select HAVE_DYNAMIC_FTRACE_WITH_REGS 65 select HAVE_COPY_THREAD_TLS 66 67 help 68 The PA-RISC microprocessor is designed by Hewlett-Packard and used 69 in many of their workstations & servers (HP9000 700 and 800 series, 70 and later HP3000 series). The PA-RISC Linux project home page is 71 at <http://www.parisc-linux.org/>. 72 73config CPU_BIG_ENDIAN 74 def_bool y 75 76config MMU 77 def_bool y 78 79config STACK_GROWSUP 80 def_bool y 81 82config ARCH_DEFCONFIG 83 string 84 default "arch/parisc/configs/generic-32bit_defconfig" if !64BIT 85 default "arch/parisc/configs/generic-64bit_defconfig" if 64BIT 86 87config GENERIC_LOCKBREAK 88 bool 89 default y 90 depends on SMP && PREEMPTION 91 92config ARCH_HAS_ILOG2_U32 93 bool 94 default n 95 96config ARCH_HAS_ILOG2_U64 97 bool 98 default n 99 100config GENERIC_BUG 101 bool 102 default y 103 depends on BUG 104 105config GENERIC_HWEIGHT 106 bool 107 default y 108 109config GENERIC_CALIBRATE_DELAY 110 bool 111 default y 112 113config TIME_LOW_RES 114 bool 115 depends on SMP 116 default y 117 118# unless you want to implement ACPI on PA-RISC ... ;-) 119config PM 120 bool 121 122config STACKTRACE_SUPPORT 123 def_bool y 124 125config ISA_DMA_API 126 bool 127 128config ARCH_MAY_HAVE_PC_FDC 129 bool 130 depends on BROKEN 131 default y 132 133config PGTABLE_LEVELS 134 int 135 default 3 if 64BIT && PARISC_PAGE_SIZE_4KB 136 default 2 137 138config SYS_SUPPORTS_HUGETLBFS 139 def_bool y if PA20 140 141 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 select DMA_NONCOHERENT_CACHE_SYNC 199 200config PREFETCH 201 def_bool y 202 depends on PA8X00 || PA7200 203 204config MLONGCALLS 205 bool "Enable the -mlong-calls compiler option for big kernels" 206 default y if !MODULES || UBSAN || FTRACE 207 default n 208 depends on PA8X00 209 help 210 If you configure the kernel to include many drivers built-in instead 211 as modules, the kernel executable may become too big, so that the 212 linker will not be able to resolve some long branches and fails to link 213 your vmlinux kernel. In that case enabling this option will help you 214 to overcome this limit by using the -mlong-calls compiler option. 215 216 Usually you want to say N here, unless you e.g. want to build 217 a kernel which includes all necessary drivers built-in and which can 218 be used for TFTP booting without the need to have an initrd ramdisk. 219 220 Enabling this option will probably slow down your kernel. 221 222config 64BIT 223 bool "64-bit kernel" 224 depends on PA8X00 225 help 226 Enable this if you want to support 64bit kernel on PA-RISC platform. 227 228 At the moment, only people willing to use more than 2GB of RAM, 229 or having a 64bit-only capable PA-RISC machine should say Y here. 230 231 Since there is no 64bit userland on PA-RISC, there is no point to 232 enable this option otherwise. The 64bit kernel is significantly bigger 233 and slower than the 32bit one. 234 235choice 236 prompt "Kernel page size" 237 default PARISC_PAGE_SIZE_4KB 238 239config PARISC_PAGE_SIZE_4KB 240 bool "4KB" 241 help 242 This lets you select the page size of the kernel. For best 243 performance, a page size of 16KB is recommended. For best 244 compatibility with 32bit applications, a page size of 4KB should be 245 selected (the vast majority of 32bit binaries work perfectly fine 246 with a larger page size). 247 248 4KB For best 32bit compatibility 249 16KB For best performance 250 64KB For best performance, might give more overhead. 251 252 If you don't know what to do, choose 4KB. 253 254config PARISC_PAGE_SIZE_16KB 255 bool "16KB" 256 depends on PA8X00 && BROKEN 257 258config PARISC_PAGE_SIZE_64KB 259 bool "64KB" 260 depends on PA8X00 && BROKEN 261 262endchoice 263 264config PARISC_SELF_EXTRACT 265 bool "Build kernel as self-extracting executable" 266 default y 267 help 268 Say Y if you want to build the parisc kernel as a kind of 269 self-extracting executable. 270 271 If you say N here, the kernel will be compressed with gzip 272 which can be loaded by the palo bootloader directly too. 273 274 If you don't know what to do here, say Y. 275 276config SMP 277 bool "Symmetric multi-processing support" 278 ---help--- 279 This enables support for systems with more than one CPU. If you have 280 a system with only one CPU, say N. If you have a system with more 281 than one CPU, say Y. 282 283 If you say N here, the kernel will run on uni- and multiprocessor 284 machines, but will use only one CPU of a multiprocessor machine. 285 On a uniprocessor machine, the kernel will run faster if you say N. 286 287 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 288 available at <http://www.tldp.org/docs.html#howto>. 289 290 If you don't know what to do here, say N. 291 292config PARISC_CPU_TOPOLOGY 293 bool "Support cpu topology definition" 294 depends on SMP 295 default y 296 help 297 Support PARISC cpu topology definition. 298 299config SCHED_MC 300 bool "Multi-core scheduler support" 301 depends on PARISC_CPU_TOPOLOGY && PA8X00 302 help 303 Multi-core scheduler support improves the CPU scheduler's decision 304 making when dealing with multi-core CPU chips at a cost of slightly 305 increased overhead in some places. If unsure say N here. 306 307config IRQSTACKS 308 bool "Use separate kernel stacks when processing interrupts" 309 default y 310 help 311 If you say Y here the kernel will use separate kernel stacks 312 for handling hard and soft interrupts. This can help avoid 313 overflowing the process kernel stacks. 314 315config HOTPLUG_CPU 316 bool 317 default y if SMP 318 319config ARCH_SELECT_MEMORY_MODEL 320 def_bool y 321 depends on 64BIT 322 323config ARCH_SPARSEMEM_ENABLE 324 def_bool y 325 depends on 64BIT 326 327config ARCH_FLATMEM_ENABLE 328 def_bool y 329 330config ARCH_SPARSEMEM_DEFAULT 331 def_bool y 332 depends on ARCH_SPARSEMEM_ENABLE 333 334source "kernel/Kconfig.hz" 335 336config COMPAT 337 def_bool y 338 depends on 64BIT 339 select COMPAT_BINFMT_ELF if BINFMT_ELF 340 341config SYSVIPC_COMPAT 342 def_bool y 343 depends on COMPAT && SYSVIPC 344 345config AUDIT_ARCH 346 def_bool y 347 348config NR_CPUS 349 int "Maximum number of CPUs (2-32)" 350 range 2 32 351 depends on SMP 352 default "4" 353 354config KEXEC 355 bool "Kexec system call" 356 select KEXEC_CORE 357 help 358 kexec is a system call that implements the ability to shutdown your 359 current kernel, and to start another kernel. It is like a reboot 360 but it is independent of the system firmware. And like a reboot 361 you can start any kernel with it, not just Linux. 362 363 It is an ongoing process to be certain the hardware in a machine 364 shutdown, so do not be surprised if this code does not 365 initially work for you. 366 367config KEXEC_FILE 368 bool "kexec file based system call" 369 select KEXEC_CORE 370 select KEXEC_ELF 371 help 372 This enables the kexec_file_load() System call. This is 373 file based and takes file descriptors as system call argument 374 for kernel and initramfs as opposed to list of segments as 375 accepted by previous system call. 376 377endmenu 378 379 380source "drivers/parisc/Kconfig" 381 382config SECCOMP 383 def_bool y 384 prompt "Enable seccomp to safely compute untrusted bytecode" 385 ---help--- 386 This kernel feature is useful for number crunching applications 387 that may need to compute untrusted bytecode during their 388 execution. By using pipes or other transports made available to 389 the process as file descriptors supporting the read/write 390 syscalls, it's possible to isolate those applications in 391 their own address space using seccomp. Once seccomp is 392 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled 393 and the task is only allowed to execute a few safe syscalls 394 defined by each seccomp mode. 395 396 If unsure, say Y. Only embedded should say N here. 397