arch/parisc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config 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 HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
  61         select GENERIC_SCHED_CLOCK
  62         select GENERIC_IRQ_MIGRATION if SMP
  63         select HAVE_UNSTABLE_SCHED_CLOCK if SMP
  64         select LEGACY_TIMER_TICK
  65         select CPU_NO_EFFICIENT_FFS
  66         select THREAD_INFO_IN_TASK
  67         select NEED_DMA_MAP_STATE
  68         select NEED_SG_DMA_LENGTH
  69         select HAVE_ARCH_KGDB
  70         select HAVE_KPROBES
  71         select HAVE_KRETPROBES
  72         select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
  73         select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
  74         select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
  75         select HAVE_KPROBES_ON_FTRACE
  76         select HAVE_DYNAMIC_FTRACE_WITH_REGS
  77         select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
  78         select TRACE_IRQFLAGS_SUPPORT
  79         select HAVE_FUNCTION_DESCRIPTORS if 64BIT
  80
  81         help
  82           The PA-RISC microprocessor is designed by Hewlett-Packard and used
  83           in many of their workstations & servers (HP9000 700 and 800 series,
  84           and later HP3000 series).  The PA-RISC Linux project home page is
  85           at <https://parisc.wiki.kernel.org>.
  86
  87 config CPU_BIG_ENDIAN
  88         def_bool y
  89
  90 config MMU
  91         def_bool y
  92
  93 config STACK_GROWSUP
  94         def_bool y
  95
  96 config GENERIC_LOCKBREAK
  97         bool
  98         default y
  99         depends on SMP && PREEMPTION
 100
 101 config ARCH_HAS_ILOG2_U32
 102         bool
 103         default n
 104
 105 config ARCH_HAS_ILOG2_U64
 106         bool
 107         default n
 108
 109 config GENERIC_BUG
 110         bool
 111         default y
 112         depends on BUG
 113
 114 config GENERIC_HWEIGHT
 115         bool
 116         default y
 117
 118 config GENERIC_CALIBRATE_DELAY
 119         bool
 120         default y
 121
 122 config TIME_LOW_RES
 123         bool
 124         depends on SMP
 125         default y
 126
 127 # unless you want to implement ACPI on PA-RISC ... ;-)
 128 config PM
 129         bool
 130
 131 config STACKTRACE_SUPPORT
 132         def_bool y
 133
 134 config LOCKDEP_SUPPORT
 135         bool
 136         default y
 137
 138 config ISA_DMA_API
 139         bool
 140
 141 config ARCH_MAY_HAVE_PC_FDC
 142         bool
 143         depends on BROKEN
 144         default y
 145
 146 config PGTABLE_LEVELS
 147         int
 148         default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
 149         default 2
 150
 151 menu "Processor type and features"
 152
 153 choice
 154         prompt "Processor type"
 155         default PA7000 if "$(ARCH)" = "parisc"
 156
 157 config PA7000
 158         bool "PA7000/PA7100" if "$(ARCH)" = "parisc"
 159         help
 160           This is the processor type of your CPU.  This information is
 161           used for optimizing purposes.  In order to compile a kernel
 162           that can run on all 32-bit PA CPUs (albeit not optimally fast),
 163           you can specify "PA7000" here.
 164
 165           Specifying "PA8000" here will allow you to select a 64-bit kernel
 166           which is required on some machines.
 167
 168 config PA7100LC
 169         bool "PA7100LC" if "$(ARCH)" = "parisc"
 170         help
 171           Select this option for the PCX-L processor, as used in the
 172           712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
 173           D200, D210, D300, D310 and E-class
 174
 175 config PA7200
 176         bool "PA7200" if "$(ARCH)" = "parisc"
 177         help
 178           Select this option for the PCX-T' processor, as used in the
 179           C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
 180           K100, K200, K210, K220, K400, K410 and K420
 181
 182 config PA7300LC
 183         bool "PA7300LC" if "$(ARCH)" = "parisc"
 184         help
 185           Select this option for the PCX-L2 processor, as used in the
 186           744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
 187           D220, D230, D320 and D330.
 188
 189 config PA8X00
 190         bool "PA8000 and up"
 191         help
 192           Select this option for PCX-U to PCX-W2 processors.
 193
 194 endchoice
 195
 196 # Define implied options from the CPU selection here
 197
 198 config PA20
 199         def_bool y
 200         depends on PA8X00
 201
 202 config PA11
 203         def_bool y
 204         depends on PA7000 || PA7100LC || PA7200 || PA7300LC
 205         select ARCH_HAS_SYNC_DMA_FOR_CPU
 206         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 207
 208 config PREFETCH
 209         def_bool y
 210         depends on PA8X00 || PA7200
 211
 212 config PARISC_HUGE_KERNEL
 213         def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
 214
 215 config MLONGCALLS
 216         def_bool y if PARISC_HUGE_KERNEL
 217         bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
 218         depends on PA8X00
 219         help
 220           If you configure the kernel to include many drivers built-in instead
 221           as modules, the kernel executable may become too big, so that the
 222           linker will not be able to resolve some long branches and fails to link
 223           your vmlinux kernel. In that case enabling this option will help you
 224           to overcome this limit by using the -mlong-calls compiler option.
 225
 226           Usually you want to say N here, unless you e.g. want to build
 227           a kernel which includes all necessary drivers built-in and which can
 228           be used for TFTP booting without the need to have an initrd ramdisk.
 229
 230           Enabling this option will probably slow down your kernel.
 231
 232 config 64BIT
 233         def_bool y if "$(ARCH)" = "parisc64"
 234         bool "64-bit kernel" if "$(ARCH)" = "parisc"
 235         depends on PA8X00
 236         help
 237           Enable this if you want to support 64bit kernel on PA-RISC platform.
 238
 239           At the moment, only people willing to use more than 2GB of RAM,
 240           or having a 64bit-only capable PA-RISC machine should say Y here.
 241
 242           Since there is no 64bit userland on PA-RISC, there is no point to
 243           enable this option otherwise. The 64bit kernel is significantly bigger
 244           and slower than the 32bit one.
 245
 246 choice
 247         prompt "Kernel page size"
 248         default PARISC_PAGE_SIZE_4KB
 249
 250 config PARISC_PAGE_SIZE_4KB
 251         bool "4KB"
 252         help
 253           This lets you select the page size of the kernel.  For best
 254           performance, a page size of 16KB is recommended.  For best
 255           compatibility with 32bit applications, a page size of 4KB should be
 256           selected (the vast majority of 32bit binaries work perfectly fine
 257           with a larger page size).
 258
 259           4KB                For best 32bit compatibility
 260           16KB               For best performance
 261           64KB               For best performance, might give more overhead.
 262
 263           If you don't know what to do, choose 4KB.
 264
 265 config PARISC_PAGE_SIZE_16KB
 266         bool "16KB"
 267         depends on PA8X00 && BROKEN && !KFENCE
 268
 269 config PARISC_PAGE_SIZE_64KB
 270         bool "64KB"
 271         depends on PA8X00 && BROKEN && !KFENCE
 272
 273 endchoice
 274
 275 config SMP
 276         bool "Symmetric multi-processing support"
 277         help
 278           This enables support for systems with more than one CPU. If you have
 279           a system with only one CPU, say N. If you have a system with more
 280           than one CPU, say Y.
 281
 282           If you say N here, the kernel will run on uni- and multiprocessor
 283           machines, but will use only one CPU of a multiprocessor machine.
 284           On a uniprocessor machine, the kernel will run faster if you say N.
 285
 286           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 287           available at <https://www.tldp.org/docs.html#howto>.
 288
 289           If you don't know what to do here, say N.
 290
 291 config SCHED_MC
 292         bool "Multi-core scheduler support"
 293         depends on GENERIC_ARCH_TOPOLOGY && PA8X00
 294         help
 295           Multi-core scheduler support improves the CPU scheduler's decision
 296           making when dealing with multi-core CPU chips at a cost of slightly
 297           increased overhead in some places. If unsure say N here.
 298
 299 config IRQSTACKS
 300         bool "Use separate kernel stacks when processing interrupts"
 301         default y
 302         help
 303           If you say Y here the kernel will use separate kernel stacks
 304           for handling hard and soft interrupts.  This can help avoid
 305           overflowing the process kernel stacks.
 306
 307 config HOTPLUG_CPU
 308         bool
 309         default y if SMP
 310
 311 config ARCH_SELECT_MEMORY_MODEL
 312         def_bool y
 313         depends on 64BIT
 314
 315 config ARCH_SPARSEMEM_ENABLE
 316         def_bool y
 317         depends on 64BIT
 318
 319 config ARCH_FLATMEM_ENABLE
 320         def_bool y
 321
 322 config ARCH_SPARSEMEM_DEFAULT
 323         def_bool y
 324         depends on ARCH_SPARSEMEM_ENABLE
 325
 326 source "kernel/Kconfig.hz"
 327
 328 config COMPAT
 329         def_bool y
 330         depends on 64BIT
 331
 332 config AUDIT_ARCH
 333         def_bool y
 334
 335 config NR_CPUS
 336         int "Maximum number of CPUs (2-32)"
 337         range 2 32
 338         depends on SMP
 339         default "4" if 64BIT
 340         default "16"
 341
 342 config KEXEC
 343         bool "Kexec system call"
 344         select KEXEC_CORE
 345         help
 346           kexec is a system call that implements the ability to shutdown your
 347           current kernel, and to start another kernel.  It is like a reboot
 348           but it is independent of the system firmware.   And like a reboot
 349           you can start any kernel with it, not just Linux.
 350
 351           It is an ongoing process to be certain the hardware in a machine
 352           shutdown, so do not be surprised if this code does not
 353           initially work for you.
 354
 355 config KEXEC_FILE
 356         bool "kexec file based system call"
 357         select KEXEC_CORE
 358         select KEXEC_ELF
 359         help
 360           This enables the kexec_file_load() System call. This is
 361           file based and takes file descriptors as system call argument
 362           for kernel and initramfs as opposed to list of segments as
 363           accepted by previous system call.
 364
 365 endmenu
 366
 367 source "drivers/parisc/Kconfig"