arch/sparc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config 64BIT
   3         bool "64-bit kernel" if "$(ARCH)" = "sparc"
   4         default "$(ARCH)" = "sparc64"
   5         help
   6           SPARC is a family of RISC microprocessors designed and marketed by
   7           Sun Microsystems, incorporated.  They are very widely found in Sun
   8           workstations and clones.
   9
  10           Say yes to build a 64-bit kernel - formerly known as sparc64
  11           Say no to build a 32-bit kernel - formerly known as sparc
  12
  13 config SPARC
  14         bool
  15         default y
  16         select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
  17         select ARCH_MIGHT_HAVE_PC_SERIO
  18         select OF
  19         select OF_PROMTREE
  20         select HAVE_ASM_MODVERSIONS
  21         select HAVE_IDE
  22         select HAVE_OPROFILE
  23         select HAVE_ARCH_KGDB if !SMP || SPARC64
  24         select HAVE_ARCH_TRACEHOOK
  25         select HAVE_EXIT_THREAD
  26         select HAVE_PCI
  27         select SYSCTL_EXCEPTION_TRACE
  28         select RTC_CLASS
  29         select RTC_DRV_M48T59
  30         select RTC_SYSTOHC
  31         select HAVE_ARCH_JUMP_LABEL if SPARC64
  32         select GENERIC_IRQ_SHOW
  33         select ARCH_WANT_IPC_PARSE_VERSION
  34         select GENERIC_PCI_IOMAP
  35         select HAVE_NMI_WATCHDOG if SPARC64
  36         select HAVE_CBPF_JIT if SPARC32
  37         select HAVE_EBPF_JIT if SPARC64
  38         select HAVE_DEBUG_BUGVERBOSE
  39         select GENERIC_SMP_IDLE_THREAD
  40         select GENERIC_CLOCKEVENTS
  41         select GENERIC_STRNCPY_FROM_USER
  42         select GENERIC_STRNLEN_USER
  43         select MODULES_USE_ELF_RELA
  44         select PCI_SYSCALL if PCI
  45         select ODD_RT_SIGACTION
  46         select OLD_SIGSUSPEND
  47         select CPU_NO_EFFICIENT_FFS
  48         select LOCKDEP_SMALL if LOCKDEP
  49         select NEED_DMA_MAP_STATE
  50         select NEED_SG_DMA_LENGTH
  51
  52 config SPARC32
  53         def_bool !64BIT
  54         select ARCH_32BIT_OFF_T
  55         select ARCH_HAS_SYNC_DMA_FOR_CPU
  56         select GENERIC_ATOMIC64
  57         select CLZ_TAB
  58         select HAVE_UID16
  59         select OLD_SIGACTION
  60
  61 config SPARC64
  62         def_bool 64BIT
  63         select HAVE_FUNCTION_TRACER
  64         select HAVE_FUNCTION_GRAPH_TRACER
  65         select HAVE_KRETPROBES
  66         select HAVE_KPROBES
  67         select MMU_GATHER_RCU_TABLE_FREE if SMP
  68         select HAVE_MEMBLOCK_NODE_MAP
  69         select HAVE_ARCH_TRANSPARENT_HUGEPAGE
  70         select HAVE_DYNAMIC_FTRACE
  71         select HAVE_FTRACE_MCOUNT_RECORD
  72         select HAVE_SYSCALL_TRACEPOINTS
  73         select HAVE_CONTEXT_TRACKING
  74         select HAVE_TIF_NOHZ
  75         select HAVE_DEBUG_KMEMLEAK
  76         select IOMMU_HELPER
  77         select SPARSE_IRQ
  78         select RTC_DRV_CMOS
  79         select RTC_DRV_BQ4802
  80         select RTC_DRV_SUN4V
  81         select RTC_DRV_STARFIRE
  82         select HAVE_PERF_EVENTS
  83         select PERF_USE_VMALLOC
  84         select IRQ_PREFLOW_FASTEOI
  85         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  86         select HAVE_C_RECORDMCOUNT
  87         select HAVE_ARCH_AUDITSYSCALL
  88         select ARCH_SUPPORTS_ATOMIC_RMW
  89         select HAVE_NMI
  90         select HAVE_REGS_AND_STACK_ACCESS_API
  91         select ARCH_USE_QUEUED_RWLOCKS
  92         select ARCH_USE_QUEUED_SPINLOCKS
  93         select GENERIC_TIME_VSYSCALL
  94         select ARCH_CLOCKSOURCE_DATA
  95         select ARCH_HAS_PTE_SPECIAL
  96         select PCI_DOMAINS if PCI
  97         select ARCH_HAS_GIGANTIC_PAGE
  98
  99 config ARCH_PROC_KCORE_TEXT
 100         def_bool y
 101
 102 config CPU_BIG_ENDIAN
 103         def_bool y
 104
 105 config ARCH_ATU
 106         bool
 107         default y if SPARC64
 108
 109 config STACKTRACE_SUPPORT
 110         bool
 111         default y if SPARC64
 112
 113 config LOCKDEP_SUPPORT
 114         bool
 115         default y if SPARC64
 116
 117 config ARCH_HIBERNATION_POSSIBLE
 118         def_bool y if SPARC64
 119
 120 config AUDIT_ARCH
 121         bool
 122         default y
 123
 124 config HAVE_SETUP_PER_CPU_AREA
 125         def_bool y if SPARC64
 126
 127 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 128         def_bool y if SPARC64
 129
 130 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 131         def_bool y if SPARC64
 132
 133 config MMU
 134         bool
 135         default y
 136
 137 config HIGHMEM
 138         bool
 139         default y if SPARC32
 140
 141 config ZONE_DMA
 142         bool
 143         default y if SPARC32
 144
 145 config GENERIC_ISA_DMA
 146         bool
 147         default y if SPARC32
 148
 149 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 150         def_bool y if SPARC64
 151
 152 config PGTABLE_LEVELS
 153         default 4 if 64BIT
 154         default 3
 155
 156 config ARCH_SUPPORTS_UPROBES
 157         def_bool y if SPARC64
 158
 159 menu "Processor type and features"
 160
 161 config SMP
 162         bool "Symmetric multi-processing support"
 163         ---help---
 164           This enables support for systems with more than one CPU. If you have
 165           a system with only one CPU, say N. If you have a system with more
 166           than one CPU, say Y.
 167
 168           If you say N here, the kernel will run on uni- and multiprocessor
 169           machines, but will use only one CPU of a multiprocessor machine. If
 170           you say Y here, the kernel will run on many, but not all,
 171           uniprocessor machines. On a uniprocessor machine, the kernel
 172           will run faster if you say N here.
 173
 174           People using multiprocessor machines who say Y here should also say
 175           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 176           Management" code will be disabled if you say Y here.
 177
 178           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 179           available at <http://www.tldp.org/docs.html#howto>.
 180
 181           If you don't know what to do here, say N.
 182
 183 config NR_CPUS
 184         int "Maximum number of CPUs"
 185         depends on SMP
 186         range 2 32 if SPARC32
 187         range 2 4096 if SPARC64
 188         default 32 if SPARC32
 189         default 4096 if SPARC64
 190
 191 source "kernel/Kconfig.hz"
 192
 193 config GENERIC_HWEIGHT
 194         bool
 195         default y
 196
 197 config GENERIC_CALIBRATE_DELAY
 198         bool
 199         default y
 200
 201 config ARCH_MAY_HAVE_PC_FDC
 202         bool
 203         default y
 204
 205 config EMULATED_CMPXCHG
 206         bool
 207         default y if SPARC32
 208         help
 209           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 210           is emulated, and therefore it is not completely atomic.
 211
 212 # Makefile helpers
 213 config SPARC32_SMP
 214         bool
 215         default y
 216         depends on SPARC32 && SMP
 217
 218 config SPARC64_SMP
 219         bool
 220         default y
 221         depends on SPARC64 && SMP
 222
 223 config EARLYFB
 224         bool "Support for early boot text console"
 225         default y
 226         depends on SPARC64
 227         help
 228           Say Y here to enable a faster early framebuffer boot console.
 229
 230 config SECCOMP
 231         bool "Enable seccomp to safely compute untrusted bytecode"
 232         depends on SPARC64 && PROC_FS
 233         default y
 234         help
 235           This kernel feature is useful for number crunching applications
 236           that may need to compute untrusted bytecode during their
 237           execution. By using pipes or other transports made available to
 238           the process as file descriptors supporting the read/write
 239           syscalls, it's possible to isolate those applications in
 240           their own address space using seccomp. Once seccomp is
 241           enabled via /proc/<pid>/seccomp, it cannot be disabled
 242           and the task is only allowed to execute a few safe syscalls
 243           defined by each seccomp mode.
 244
 245           If unsure, say Y. Only embedded should say N here.
 246
 247 config HOTPLUG_CPU
 248         bool "Support for hot-pluggable CPUs"
 249         depends on SPARC64 && SMP
 250         help
 251           Say Y here to experiment with turning CPUs off and on.  CPUs
 252           can be controlled through /sys/devices/system/cpu/cpu#.
 253           Say N if you want to disable CPU hotplug.
 254
 255 if SPARC64
 256 source "drivers/cpufreq/Kconfig"
 257 endif
 258
 259 config US3_MC
 260         tristate "UltraSPARC-III Memory Controller driver"
 261         depends on SPARC64
 262         default y
 263         help
 264           This adds a driver for the UltraSPARC-III memory controller.
 265           Loading this driver allows exact mnemonic strings to be
 266           printed in the event of a memory error, so that the faulty DIMM
 267           on the motherboard can be matched to the error.
 268
 269           If in doubt, say Y, as this information can be very useful.
 270
 271 # Global things across all Sun machines.
 272 config GENERIC_LOCKBREAK
 273         bool
 274         default y
 275         depends on SPARC64 && SMP && PREEMPTION
 276
 277 config NUMA
 278         bool "NUMA support"
 279         depends on SPARC64 && SMP
 280
 281 config NODES_SHIFT
 282         int "Maximum NUMA Nodes (as a power of 2)"
 283         range 4 5 if SPARC64
 284         default "5"
 285         depends on NEED_MULTIPLE_NODES
 286         help
 287           Specify the maximum number of NUMA Nodes available on the target
 288           system.  Increases memory reserved to accommodate various tables.
 289
 290 # Some NUMA nodes have memory ranges that span
 291 # other nodes.  Even though a pfn is valid and
 292 # between a node's start and end pfns, it may not
 293 # reside on that node.  See memmap_init_zone()
 294 # for details.
 295 config NODES_SPAN_OTHER_NODES
 296         def_bool y
 297         depends on NEED_MULTIPLE_NODES
 298
 299 config ARCH_SPARSEMEM_ENABLE
 300         def_bool y if SPARC64
 301         select SPARSEMEM_VMEMMAP_ENABLE
 302
 303 config ARCH_SPARSEMEM_DEFAULT
 304         def_bool y if SPARC64
 305
 306 config FORCE_MAX_ZONEORDER
 307         int "Maximum zone order"
 308         default "13"
 309         help
 310           The kernel memory allocator divides physically contiguous memory
 311           blocks into "zones", where each zone is a power of two number of
 312           pages.  This option selects the largest power of two that the kernel
 313           keeps in the memory allocator.  If you need to allocate very large
 314           blocks of physically contiguous memory, then you may need to
 315           increase this value.
 316
 317           This config option is actually maximum order plus one. For example,
 318           a value of 13 means that the largest free memory block is 2^12 pages.
 319
 320 if SPARC64
 321 source "kernel/power/Kconfig"
 322 endif
 323
 324 config SCHED_SMT
 325         bool "SMT (Hyperthreading) scheduler support"
 326         depends on SPARC64 && SMP
 327         default y
 328         help
 329           SMT scheduler support improves the CPU scheduler's decision making
 330           when dealing with SPARC cpus at a cost of slightly increased overhead
 331           in some places. If unsure say N here.
 332
 333 config SCHED_MC
 334         bool "Multi-core scheduler support"
 335         depends on SPARC64 && SMP
 336         default y
 337         help
 338           Multi-core scheduler support improves the CPU scheduler's decision
 339           making when dealing with multi-core CPU chips at a cost of slightly
 340           increased overhead in some places. If unsure say N here.
 341
 342 config CMDLINE_BOOL
 343         bool "Default bootloader kernel arguments"
 344         depends on SPARC64
 345
 346 config CMDLINE
 347         string "Initial kernel command string"
 348         depends on CMDLINE_BOOL
 349         default "console=ttyS0,9600 root=/dev/sda1"
 350         help
 351           Say Y here if you want to be able to pass default arguments to
 352           the kernel. This will be overridden by the bootloader, if you
 353           use one (such as SILO). This is most useful if you want to boot
 354           a kernel from TFTP, and want default options to be available
 355           with having them passed on the command line.
 356
 357           NOTE: This option WILL override the PROM bootargs setting!
 358
 359 config SUN_PM
 360         bool
 361         default y if SPARC32
 362         help
 363           Enable power management and CPU standby features on supported
 364           SPARC platforms.
 365
 366 config SPARC_LED
 367         tristate "Sun4m LED driver"
 368         depends on SPARC32
 369         help
 370           This driver toggles the front-panel LED on sun4m systems
 371           in a user-specifiable manner.  Its state can be probed
 372           by reading /proc/led and its blinking mode can be changed
 373           via writes to /proc/led
 374
 375 config SERIAL_CONSOLE
 376         bool
 377         depends on SPARC32
 378         default y
 379         ---help---
 380           If you say Y here, it will be possible to use a serial port as the
 381           system console (the system console is the device which receives all
 382           kernel messages and warnings and which allows logins in single user
 383           mode). This could be useful if some terminal or printer is connected
 384           to that serial port.
 385
 386           Even if you say Y here, the currently visible virtual console
 387           (/dev/tty0) will still be used as the system console by default, but
 388           you can alter that using a kernel command line option such as
 389           "console=ttyS1". (Try "man bootparam" or see the documentation of
 390           your boot loader (silo) about how to pass options to the kernel at
 391           boot time.)
 392
 393           If you don't have a graphics card installed and you say Y here, the
 394           kernel will automatically use the first serial line, /dev/ttyS0, as
 395           system console.
 396
 397           If unsure, say N.
 398
 399 config SPARC_LEON
 400         bool "Sparc Leon processor family"
 401         depends on SPARC32
 402         select USB_EHCI_BIG_ENDIAN_MMIO
 403         select USB_EHCI_BIG_ENDIAN_DESC
 404         select USB_UHCI_BIG_ENDIAN_MMIO
 405         select USB_UHCI_BIG_ENDIAN_DESC
 406         ---help---
 407           If you say Y here if you are running on a SPARC-LEON processor.
 408           The LEON processor is a synthesizable VHDL model of the
 409           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 410           IP cores that are distributed under GPL. GRLIB can be downloaded
 411           from www.gaisler.com. You can download a sparc-linux cross-compilation
 412           toolchain at www.gaisler.com.
 413
 414 if SPARC_LEON
 415 menu "U-Boot options"
 416
 417 config UBOOT_LOAD_ADDR
 418         hex "uImage Load Address"
 419         default 0x40004000
 420         ---help---
 421          U-Boot kernel load address, the address in physical address space
 422          where u-boot will place the Linux kernel before booting it.
 423          This address is normally the base address of main memory + 0x4000.
 424
 425 config UBOOT_FLASH_ADDR
 426         hex "uImage.o Load Address"
 427         default 0x00080000
 428         ---help---
 429          Optional setting only affecting the uImage.o ELF-image used to
 430          download the uImage file to the target using a ELF-loader other than
 431          U-Boot. It may for example be used to download an uImage to FLASH with
 432          the GRMON utility before even starting u-boot.
 433
 434 config UBOOT_ENTRY_ADDR
 435         hex "uImage Entry Address"
 436         default 0xf0004000
 437         ---help---
 438          Do not change this unless you know what you're doing. This is
 439          hardcoded by the SPARC32 and LEON port.
 440
 441          This is the virtual address u-boot jumps to when booting the Linux
 442          Kernel.
 443
 444 endmenu
 445 endif
 446
 447 endmenu
 448
 449 menu "Bus options (PCI etc.)"
 450 config SBUS
 451         bool
 452         default y
 453
 454 config SBUSCHAR
 455         bool
 456         default y
 457
 458 config SUN_LDOMS
 459         bool "Sun Logical Domains support"
 460         depends on SPARC64
 461         help
 462           Say Y here is you want to support virtual devices via
 463           Logical Domains.
 464
 465 config PCIC_PCI
 466         bool
 467         depends on PCI && SPARC32 && !SPARC_LEON
 468         default y
 469
 470 config LEON_PCI
 471         bool
 472         depends on PCI && SPARC_LEON
 473         default y
 474
 475 config SPARC_GRPCI1
 476         bool "GRPCI Host Bridge Support"
 477         depends on LEON_PCI
 478         default y
 479         help
 480           Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
 481           PCI host controller is typically found in GRLIB SPARC32/LEON
 482           systems. The driver has one property (all_pci_errors) controlled
 483           from the bootloader that makes the GRPCI to generate interrupts
 484           on detected PCI Parity and System errors.
 485
 486 config SPARC_GRPCI2
 487         bool "GRPCI2 Host Bridge Support"
 488         depends on LEON_PCI
 489         default y
 490         help
 491           Say Y here to include the GRPCI2 Host Bridge Driver.
 492
 493 config SUN_OPENPROMFS
 494         tristate "Openprom tree appears in /proc/openprom"
 495         help
 496           If you say Y, the OpenPROM device tree will be available as a
 497           virtual file system, which you can mount to /proc/openprom by "mount
 498           -t openpromfs none /proc/openprom".
 499
 500           To compile the /proc/openprom support as a module, choose M here: the
 501           module will be called openpromfs.
 502
 503           Only choose N if you know in advance that you will not need to modify
 504           OpenPROM settings on the running system.
 505
 506 # Makefile helpers
 507 config SPARC64_PCI
 508         bool
 509         default y
 510         depends on SPARC64 && PCI
 511
 512 config SPARC64_PCI_MSI
 513         bool
 514         default y
 515         depends on SPARC64_PCI && PCI_MSI
 516
 517 endmenu
 518
 519 config COMPAT
 520         bool
 521         depends on SPARC64
 522         default y
 523         select COMPAT_BINFMT_ELF
 524         select HAVE_UID16
 525         select ARCH_WANT_OLD_COMPAT_IPC
 526         select COMPAT_OLD_SIGACTION
 527
 528 config SYSVIPC_COMPAT
 529         bool
 530         depends on COMPAT && SYSVIPC
 531         default y
 532
 533 source "drivers/sbus/char/Kconfig"