arch/parisc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config PARISC
   3         def_bool y
   4         select ARCH_MIGHT_HAVE_PC_PARPORT
   5         select HAVE_IDE
   6         select HAVE_OPROFILE
   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_MEMORY_FAILURE
  16         select RTC_CLASS
  17         select RTC_DRV_GENERIC
  18         select INIT_ALL_POSSIBLE
  19         select BUG
  20         select BUILDTIME_EXTABLE_SORT
  21         select HAVE_PCI
  22         select HAVE_PERF_EVENTS
  23         select HAVE_KERNEL_BZIP2
  24         select HAVE_KERNEL_GZIP
  25         select HAVE_KERNEL_LZ4
  26         select HAVE_KERNEL_LZMA
  27         select HAVE_KERNEL_LZO
  28         select HAVE_KERNEL_XZ
  29         select GENERIC_ATOMIC64 if !64BIT
  30         select GENERIC_IRQ_PROBE
  31         select GENERIC_PCI_IOMAP
  32         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  33         select GENERIC_SMP_IDLE_THREAD
  34         select GENERIC_CPU_DEVICES
  35         select GENERIC_STRNCPY_FROM_USER
  36         select SYSCTL_ARCH_UNALIGN_ALLOW
  37         select SYSCTL_EXCEPTION_TRACE
  38         select HAVE_MOD_ARCH_SPECIFIC
  39         select VIRT_TO_BUS
  40         select MODULES_USE_ELF_RELA
  41         select CLONE_BACKWARDS
  42         select TTY # Needed for pdc_cons.c
  43         select HAVE_DEBUG_STACKOVERFLOW
  44         select HAVE_ARCH_AUDITSYSCALL
  45         select HAVE_ARCH_HASH
  46         select HAVE_ARCH_SECCOMP_FILTER
  47         select HAVE_ARCH_TRACEHOOK
  48         select HAVE_REGS_AND_STACK_ACCESS_API
  49         select GENERIC_SCHED_CLOCK
  50         select HAVE_UNSTABLE_SCHED_CLOCK if SMP
  51         select GENERIC_CLOCKEVENTS
  52         select ARCH_NO_COHERENT_DMA_MMAP
  53         select CPU_NO_EFFICIENT_FFS
  54         select NEED_DMA_MAP_STATE
  55         select NEED_SG_DMA_LENGTH
  56
  57         help
  58           The PA-RISC microprocessor is designed by Hewlett-Packard and used
  59           in many of their workstations & servers (HP9000 700 and 800 series,
  60           and later HP3000 series).  The PA-RISC Linux project home page is
  61           at <http://www.parisc-linux.org/>.
  62
  63 config CPU_BIG_ENDIAN
  64         def_bool y
  65
  66 config MMU
  67         def_bool y
  68
  69 config STACK_GROWSUP
  70         def_bool y
  71
  72 config GENERIC_LOCKBREAK
  73         bool
  74         default y
  75         depends on SMP && PREEMPT
  76
  77 config RWSEM_GENERIC_SPINLOCK
  78         def_bool y
  79
  80 config RWSEM_XCHGADD_ALGORITHM
  81         bool
  82
  83 config ARCH_HAS_ILOG2_U32
  84         bool
  85         default n
  86
  87 config ARCH_HAS_ILOG2_U64
  88         bool
  89         default n
  90
  91 config GENERIC_BUG
  92         bool
  93         default y
  94         depends on BUG
  95
  96 config GENERIC_HWEIGHT
  97         bool
  98         default y
  99
 100 config GENERIC_CALIBRATE_DELAY
 101         bool
 102         default y
 103
 104 config TIME_LOW_RES
 105         bool
 106         depends on SMP
 107         default y
 108
 109 # unless you want to implement ACPI on PA-RISC ... ;-)
 110 config PM
 111         bool
 112
 113 config STACKTRACE_SUPPORT
 114         def_bool y
 115
 116 config ISA_DMA_API
 117         bool
 118
 119 config ARCH_MAY_HAVE_PC_FDC
 120         bool
 121         depends on BROKEN
 122         default y
 123
 124 config PGTABLE_LEVELS
 125         int
 126         default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
 127         default 2
 128
 129 config SYS_SUPPORTS_HUGETLBFS
 130         def_bool y if PA20
 131
 132
 133 menu "Processor type and features"
 134
 135 choice
 136         prompt "Processor type"
 137         default PA7000
 138
 139 config PA7000
 140         bool "PA7000/PA7100"
 141         ---help---
 142           This is the processor type of your CPU.  This information is
 143           used for optimizing purposes.  In order to compile a kernel
 144           that can run on all 32-bit PA CPUs (albeit not optimally fast),
 145           you can specify "PA7000" here.
 146
 147           Specifying "PA8000" here will allow you to select a 64-bit kernel
 148           which is required on some machines.
 149
 150 config PA7100LC
 151         bool "PA7100LC"
 152         help
 153           Select this option for the PCX-L processor, as used in the
 154           712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
 155           D200, D210, D300, D310 and E-class
 156
 157 config PA7200
 158         bool "PA7200"
 159         help
 160           Select this option for the PCX-T' processor, as used in the
 161           C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
 162           K100, K200, K210, K220, K400, K410 and K420
 163
 164 config PA7300LC
 165         bool "PA7300LC"
 166         help
 167           Select this option for the PCX-L2 processor, as used in the
 168           744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
 169           D220, D230, D320 and D330.
 170
 171 config PA8X00
 172         bool "PA8000 and up"
 173         help
 174           Select this option for PCX-U to PCX-W2 processors.
 175
 176 endchoice
 177
 178 # Define implied options from the CPU selection here
 179
 180 config PA20
 181         def_bool y
 182         depends on PA8X00
 183
 184 config PA11
 185         def_bool y
 186         depends on PA7000 || PA7100LC || PA7200 || PA7300LC
 187         select ARCH_HAS_SYNC_DMA_FOR_CPU
 188         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 189         select DMA_NONCOHERENT_CACHE_SYNC
 190
 191 config PREFETCH
 192         def_bool y
 193         depends on PA8X00 || PA7200
 194
 195 config MLONGCALLS
 196         bool "Enable the -mlong-calls compiler option for big kernels"
 197         default y
 198         depends on PA8X00
 199         help
 200           If you configure the kernel to include many drivers built-in instead
 201           as modules, the kernel executable may become too big, so that the
 202           linker will not be able to resolve some long branches and fails to link
 203           your vmlinux kernel. In that case enabling this option will help you
 204           to overcome this limit by using the -mlong-calls compiler option.
 205
 206           Usually you want to say N here, unless you e.g. want to build
 207           a kernel which includes all necessary drivers built-in and which can
 208           be used for TFTP booting without the need to have an initrd ramdisk.
 209
 210           Enabling this option will probably slow down your kernel.
 211
 212 config 64BIT
 213         bool "64-bit kernel"
 214         depends on PA8X00
 215         help
 216           Enable this if you want to support 64bit kernel on PA-RISC platform.
 217
 218           At the moment, only people willing to use more than 2GB of RAM,
 219           or having a 64bit-only capable PA-RISC machine should say Y here.
 220
 221           Since there is no 64bit userland on PA-RISC, there is no point to
 222           enable this option otherwise. The 64bit kernel is significantly bigger
 223           and slower than the 32bit one.
 224
 225 choice
 226         prompt "Kernel page size"
 227         default PARISC_PAGE_SIZE_4KB
 228
 229 config PARISC_PAGE_SIZE_4KB
 230         bool "4KB"
 231         help
 232           This lets you select the page size of the kernel.  For best
 233           performance, a page size of 16KB is recommended.  For best
 234           compatibility with 32bit applications, a page size of 4KB should be
 235           selected (the vast majority of 32bit binaries work perfectly fine
 236           with a larger page size).
 237
 238           4KB                For best 32bit compatibility
 239           16KB               For best performance
 240           64KB               For best performance, might give more overhead.
 241
 242           If you don't know what to do, choose 4KB.
 243
 244 config PARISC_PAGE_SIZE_16KB
 245         bool "16KB"
 246         depends on PA8X00 && BROKEN
 247
 248 config PARISC_PAGE_SIZE_64KB
 249         bool "64KB"
 250         depends on PA8X00 && BROKEN
 251
 252 endchoice
 253
 254 config PARISC_SELF_EXTRACT
 255         bool "Build kernel as self-extracting executable"
 256         default y
 257         help
 258           Say Y if you want to build the parisc kernel as a kind of
 259           self-extracting executable.
 260
 261           If you say N here, the kernel will be compressed with gzip
 262           which can be loaded by the palo bootloader directly too.
 263
 264           If you don't know what to do here, say Y.
 265
 266 config SMP
 267         bool "Symmetric multi-processing support"
 268         ---help---
 269           This enables support for systems with more than one CPU. If you have
 270           a system with only one CPU, say N. If you have a system with more
 271           than one CPU, say Y.
 272
 273           If you say N here, the kernel will run on uni- and multiprocessor
 274           machines, but will use only one CPU of a multiprocessor machine.
 275           On a uniprocessor machine, the kernel will run faster if you say N.
 276
 277           See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
 278           available at <http://www.tldp.org/docs.html#howto>.
 279
 280           If you don't know what to do here, say N.
 281
 282 config PARISC_CPU_TOPOLOGY
 283         bool "Support cpu topology definition"
 284         depends on SMP
 285         default y
 286         help
 287           Support PARISC cpu topology definition.
 288
 289 config SCHED_MC
 290         bool "Multi-core scheduler support"
 291         depends on PARISC_CPU_TOPOLOGY && PA8X00
 292         help
 293           Multi-core scheduler support improves the CPU scheduler's decision
 294           making when dealing with multi-core CPU chips at a cost of slightly
 295           increased overhead in some places. If unsure say N here.
 296
 297 config IRQSTACKS
 298         bool "Use separate kernel stacks when processing interrupts"
 299         default y
 300         help
 301           If you say Y here the kernel will use separate kernel stacks
 302           for handling hard and soft interrupts.  This can help avoid
 303           overflowing the process kernel stacks.
 304
 305 config HOTPLUG_CPU
 306         bool
 307         default y if SMP
 308
 309 config ARCH_SELECT_MEMORY_MODEL
 310         def_bool y
 311         depends on 64BIT
 312
 313 config ARCH_DISCONTIGMEM_ENABLE
 314         def_bool y
 315         depends on 64BIT
 316
 317 config ARCH_FLATMEM_ENABLE
 318         def_bool y
 319
 320 config ARCH_DISCONTIGMEM_DEFAULT
 321         def_bool y
 322         depends on ARCH_DISCONTIGMEM_ENABLE
 323
 324 config NODES_SHIFT
 325         int
 326         default "3"
 327         depends on NEED_MULTIPLE_NODES
 328
 329 source "kernel/Kconfig.hz"
 330
 331 config COMPAT
 332         def_bool y
 333         depends on 64BIT
 334         select COMPAT_BINFMT_ELF if BINFMT_ELF
 335
 336 config SYSVIPC_COMPAT
 337         def_bool y
 338         depends on COMPAT && SYSVIPC
 339
 340 config AUDIT_ARCH
 341         def_bool y
 342
 343 config NR_CPUS
 344         int "Maximum number of CPUs (2-32)"
 345         range 2 32
 346         depends on SMP
 347         default "4"
 348
 349 endmenu
 350
 351
 352 source "drivers/parisc/Kconfig"
 353
 354 config SECCOMP
 355         def_bool y
 356         prompt "Enable seccomp to safely compute untrusted bytecode"
 357         ---help---
 358           This kernel feature is useful for number crunching applications
 359           that may need to compute untrusted bytecode during their
 360           execution. By using pipes or other transports made available to
 361           the process as file descriptors supporting the read/write
 362           syscalls, it's possible to isolate those applications in
 363           their own address space using seccomp. Once seccomp is
 364           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
 365           and the task is only allowed to execute a few safe syscalls
 366           defined by each seccomp mode.
 367
 368           If unsure, say Y. Only embedded should say N here.