arch/parisc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config 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 <https://parisc.wiki.kernel.org>.
  72
  73 config CPU_BIG_ENDIAN
  74         def_bool y
  75
  76 config MMU
  77         def_bool y
  78
  79 config STACK_GROWSUP
  80         def_bool y
  81
  82 config 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
  87 config GENERIC_LOCKBREAK
  88         bool
  89         default y
  90         depends on SMP && PREEMPTION
  91
  92 config ARCH_HAS_ILOG2_U32
  93         bool
  94         default n
  95
  96 config ARCH_HAS_ILOG2_U64
  97         bool
  98         default n
  99
 100 config GENERIC_BUG
 101         bool
 102         default y
 103         depends on BUG
 104
 105 config GENERIC_HWEIGHT
 106         bool
 107         default y
 108
 109 config GENERIC_CALIBRATE_DELAY
 110         bool
 111         default y
 112
 113 config TIME_LOW_RES
 114         bool
 115         depends on SMP
 116         default y
 117
 118 # unless you want to implement ACPI on PA-RISC ... ;-)
 119 config PM
 120         bool
 121
 122 config STACKTRACE_SUPPORT
 123         def_bool y
 124
 125 config ISA_DMA_API
 126         bool
 127
 128 config ARCH_MAY_HAVE_PC_FDC
 129         bool
 130         depends on BROKEN
 131         default y
 132
 133 config PGTABLE_LEVELS
 134         int
 135         default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
 136         default 2
 137
 138 config SYS_SUPPORTS_HUGETLBFS
 139         def_bool y if PA20
 140
 141
 142 menu "Processor type and features"
 143
 144 choice
 145         prompt "Processor type"
 146         default PA7000
 147
 148 config 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
 159 config 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
 166 config 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
 173 config 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
 180 config PA8X00
 181         bool "PA8000 and up"
 182         help
 183           Select this option for PCX-U to PCX-W2 processors.
 184
 185 endchoice
 186
 187 # Define implied options from the CPU selection here
 188
 189 config PA20
 190         def_bool y
 191         depends on PA8X00
 192
 193 config 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
 200 config PREFETCH
 201         def_bool y
 202         depends on PA8X00 || PA7200
 203
 204 config 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
 222 config 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
 235 choice
 236         prompt "Kernel page size"
 237         default PARISC_PAGE_SIZE_4KB
 238
 239 config 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
 254 config PARISC_PAGE_SIZE_16KB
 255         bool "16KB"
 256         depends on PA8X00 && BROKEN
 257
 258 config PARISC_PAGE_SIZE_64KB
 259         bool "64KB"
 260         depends on PA8X00 && BROKEN
 261
 262 endchoice
 263
 264 config 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
 276 config 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
 292 config 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
 299 config 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
 307 config 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
 315 config HOTPLUG_CPU
 316         bool
 317         default y if SMP
 318
 319 config ARCH_SELECT_MEMORY_MODEL
 320         def_bool y
 321         depends on 64BIT
 322
 323 config ARCH_SPARSEMEM_ENABLE
 324         def_bool y
 325         depends on 64BIT
 326
 327 config ARCH_FLATMEM_ENABLE
 328         def_bool y
 329
 330 config ARCH_SPARSEMEM_DEFAULT
 331         def_bool y
 332         depends on ARCH_SPARSEMEM_ENABLE
 333
 334 source "kernel/Kconfig.hz"
 335
 336 config COMPAT
 337         def_bool y
 338         depends on 64BIT
 339         select COMPAT_BINFMT_ELF if BINFMT_ELF
 340
 341 config SYSVIPC_COMPAT
 342         def_bool y
 343         depends on COMPAT && SYSVIPC
 344
 345 config AUDIT_ARCH
 346         def_bool y
 347
 348 config NR_CPUS
 349         int "Maximum number of CPUs (2-32)"
 350         range 2 32
 351         depends on SMP
 352         default "4"
 353
 354 config 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
 367 config 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
 377 endmenu
 378
 379
 380 source "drivers/parisc/Kconfig"
 381
 382 config 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.