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_IDE
  21         select HAVE_OPROFILE
  22         select HAVE_ARCH_KGDB if !SMP || SPARC64
  23         select HAVE_ARCH_TRACEHOOK
  24         select HAVE_EXIT_THREAD
  25         select HAVE_PCI
  26         select SYSCTL_EXCEPTION_TRACE
  27         select RTC_CLASS
  28         select RTC_DRV_M48T59
  29         select RTC_SYSTOHC
  30         select HAVE_ARCH_JUMP_LABEL if SPARC64
  31         select HAVE_FAST_GUP 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 HAVE_RCU_TABLE_FREE if SMP
  68         select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE
  69         select HAVE_MEMBLOCK_NODE_MAP
  70         select HAVE_ARCH_TRANSPARENT_HUGEPAGE
  71         select HAVE_DYNAMIC_FTRACE
  72         select HAVE_FTRACE_MCOUNT_RECORD
  73         select HAVE_SYSCALL_TRACEPOINTS
  74         select HAVE_CONTEXT_TRACKING
  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_DEFCONFIG
 100         string
 101         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
 102         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
 103
 104 config ARCH_PROC_KCORE_TEXT
 105         def_bool y
 106
 107 config CPU_BIG_ENDIAN
 108         def_bool y
 109
 110 config ARCH_ATU
 111         bool
 112         default y if SPARC64
 113
 114 config STACKTRACE_SUPPORT
 115         bool
 116         default y if SPARC64
 117
 118 config LOCKDEP_SUPPORT
 119         bool
 120         default y if SPARC64
 121
 122 config ARCH_HIBERNATION_POSSIBLE
 123         def_bool y if SPARC64
 124
 125 config AUDIT_ARCH
 126         bool
 127         default y
 128
 129 config HAVE_SETUP_PER_CPU_AREA
 130         def_bool y if SPARC64
 131
 132 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 133         def_bool y if SPARC64
 134
 135 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 136         def_bool y if SPARC64
 137
 138 config MMU
 139         bool
 140         default y
 141
 142 config HIGHMEM
 143         bool
 144         default y if SPARC32
 145
 146 config ZONE_DMA
 147         bool
 148         default y if SPARC32
 149
 150 config GENERIC_ISA_DMA
 151         bool
 152         default y if SPARC32
 153
 154 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 155         def_bool y if SPARC64
 156
 157 config PGTABLE_LEVELS
 158         default 4 if 64BIT
 159         default 3
 160
 161 config ARCH_SUPPORTS_UPROBES
 162         def_bool y if SPARC64
 163
 164 menu "Processor type and features"
 165
 166 config SMP
 167         bool "Symmetric multi-processing support"
 168         ---help---
 169           This enables support for systems with more than one CPU. If you have
 170           a system with only one CPU, say N. If you have a system with more
 171           than one CPU, say Y.
 172
 173           If you say N here, the kernel will run on uni- and multiprocessor
 174           machines, but will use only one CPU of a multiprocessor machine. If
 175           you say Y here, the kernel will run on many, but not all,
 176           uniprocessor machines. On a uniprocessor machine, the kernel
 177           will run faster if you say N here.
 178
 179           People using multiprocessor machines who say Y here should also say
 180           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 181           Management" code will be disabled if you say Y here.
 182
 183           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 184           available at <http://www.tldp.org/docs.html#howto>.
 185
 186           If you don't know what to do here, say N.
 187
 188 config NR_CPUS
 189         int "Maximum number of CPUs"
 190         depends on SMP
 191         range 2 32 if SPARC32
 192         range 2 4096 if SPARC64
 193         default 32 if SPARC32
 194         default 4096 if SPARC64
 195
 196 source "kernel/Kconfig.hz"
 197
 198 config GENERIC_HWEIGHT
 199         bool
 200         default y
 201
 202 config GENERIC_CALIBRATE_DELAY
 203         bool
 204         default y
 205
 206 config ARCH_MAY_HAVE_PC_FDC
 207         bool
 208         default y
 209
 210 config EMULATED_CMPXCHG
 211         bool
 212         default y if SPARC32
 213         help
 214           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 215           is emulated, and therefore it is not completely atomic.
 216
 217 # Makefile helpers
 218 config SPARC32_SMP
 219         bool
 220         default y
 221         depends on SPARC32 && SMP
 222
 223 config SPARC64_SMP
 224         bool
 225         default y
 226         depends on SPARC64 && SMP
 227
 228 config EARLYFB
 229         bool "Support for early boot text console"
 230         default y
 231         depends on SPARC64
 232         help
 233           Say Y here to enable a faster early framebuffer boot console.
 234
 235 config SECCOMP
 236         bool "Enable seccomp to safely compute untrusted bytecode"
 237         depends on SPARC64 && PROC_FS
 238         default y
 239         help
 240           This kernel feature is useful for number crunching applications
 241           that may need to compute untrusted bytecode during their
 242           execution. By using pipes or other transports made available to
 243           the process as file descriptors supporting the read/write
 244           syscalls, it's possible to isolate those applications in
 245           their own address space using seccomp. Once seccomp is
 246           enabled via /proc/<pid>/seccomp, it cannot be disabled
 247           and the task is only allowed to execute a few safe syscalls
 248           defined by each seccomp mode.
 249
 250           If unsure, say Y. Only embedded should say N here.
 251
 252 config HOTPLUG_CPU
 253         bool "Support for hot-pluggable CPUs"
 254         depends on SPARC64 && SMP
 255         help
 256           Say Y here to experiment with turning CPUs off and on.  CPUs
 257           can be controlled through /sys/devices/system/cpu/cpu#.
 258           Say N if you want to disable CPU hotplug.
 259
 260 if SPARC64
 261 source "drivers/cpufreq/Kconfig"
 262 endif
 263
 264 config US3_MC
 265         tristate "UltraSPARC-III Memory Controller driver"
 266         depends on SPARC64
 267         default y
 268         help
 269           This adds a driver for the UltraSPARC-III memory controller.
 270           Loading this driver allows exact mnemonic strings to be
 271           printed in the event of a memory error, so that the faulty DIMM
 272           on the motherboard can be matched to the error.
 273
 274           If in doubt, say Y, as this information can be very useful.
 275
 276 # Global things across all Sun machines.
 277 config GENERIC_LOCKBREAK
 278         bool
 279         default y
 280         depends on SPARC64 && SMP && PREEMPT
 281
 282 config NUMA
 283         bool "NUMA support"
 284         depends on SPARC64 && SMP
 285
 286 config NODES_SHIFT
 287         int "Maximum NUMA Nodes (as a power of 2)"
 288         range 4 5 if SPARC64
 289         default "5"
 290         depends on NEED_MULTIPLE_NODES
 291         help
 292           Specify the maximum number of NUMA Nodes available on the target
 293           system.  Increases memory reserved to accommodate various tables.
 294
 295 # Some NUMA nodes have memory ranges that span
 296 # other nodes.  Even though a pfn is valid and
 297 # between a node's start and end pfns, it may not
 298 # reside on that node.  See memmap_init_zone()
 299 # for details.
 300 config NODES_SPAN_OTHER_NODES
 301         def_bool y
 302         depends on NEED_MULTIPLE_NODES
 303
 304 config ARCH_SPARSEMEM_ENABLE
 305         def_bool y if SPARC64
 306         select SPARSEMEM_VMEMMAP_ENABLE
 307
 308 config ARCH_SPARSEMEM_DEFAULT
 309         def_bool y if SPARC64
 310
 311 config FORCE_MAX_ZONEORDER
 312         int "Maximum zone order"
 313         default "13"
 314         help
 315           The kernel memory allocator divides physically contiguous memory
 316           blocks into "zones", where each zone is a power of two number of
 317           pages.  This option selects the largest power of two that the kernel
 318           keeps in the memory allocator.  If you need to allocate very large
 319           blocks of physically contiguous memory, then you may need to
 320           increase this value.
 321
 322           This config option is actually maximum order plus one. For example,
 323           a value of 13 means that the largest free memory block is 2^12 pages.
 324
 325 if SPARC64
 326 source "kernel/power/Kconfig"
 327 endif
 328
 329 config SCHED_SMT
 330         bool "SMT (Hyperthreading) scheduler support"
 331         depends on SPARC64 && SMP
 332         default y
 333         help
 334           SMT scheduler support improves the CPU scheduler's decision making
 335           when dealing with SPARC cpus at a cost of slightly increased overhead
 336           in some places. If unsure say N here.
 337
 338 config SCHED_MC
 339         bool "Multi-core scheduler support"
 340         depends on SPARC64 && SMP
 341         default y
 342         help
 343           Multi-core scheduler support improves the CPU scheduler's decision
 344           making when dealing with multi-core CPU chips at a cost of slightly
 345           increased overhead in some places. If unsure say N here.
 346
 347 config CMDLINE_BOOL
 348         bool "Default bootloader kernel arguments"
 349         depends on SPARC64
 350
 351 config CMDLINE
 352         string "Initial kernel command string"
 353         depends on CMDLINE_BOOL
 354         default "console=ttyS0,9600 root=/dev/sda1"
 355         help
 356           Say Y here if you want to be able to pass default arguments to
 357           the kernel. This will be overridden by the bootloader, if you
 358           use one (such as SILO). This is most useful if you want to boot
 359           a kernel from TFTP, and want default options to be available
 360           with having them passed on the command line.
 361
 362           NOTE: This option WILL override the PROM bootargs setting!
 363
 364 config SUN_PM
 365         bool
 366         default y if SPARC32
 367         help
 368           Enable power management and CPU standby features on supported
 369           SPARC platforms.
 370
 371 config SPARC_LED
 372         tristate "Sun4m LED driver"
 373         depends on SPARC32
 374         help
 375           This driver toggles the front-panel LED on sun4m systems
 376           in a user-specifiable manner.  Its state can be probed
 377           by reading /proc/led and its blinking mode can be changed
 378           via writes to /proc/led
 379
 380 config SERIAL_CONSOLE
 381         bool
 382         depends on SPARC32
 383         default y
 384         ---help---
 385           If you say Y here, it will be possible to use a serial port as the
 386           system console (the system console is the device which receives all
 387           kernel messages and warnings and which allows logins in single user
 388           mode). This could be useful if some terminal or printer is connected
 389           to that serial port.
 390
 391           Even if you say Y here, the currently visible virtual console
 392           (/dev/tty0) will still be used as the system console by default, but
 393           you can alter that using a kernel command line option such as
 394           "console=ttyS1". (Try "man bootparam" or see the documentation of
 395           your boot loader (silo) about how to pass options to the kernel at
 396           boot time.)
 397
 398           If you don't have a graphics card installed and you say Y here, the
 399           kernel will automatically use the first serial line, /dev/ttyS0, as
 400           system console.
 401
 402           If unsure, say N.
 403
 404 config SPARC_LEON
 405         bool "Sparc Leon processor family"
 406         depends on SPARC32
 407         select USB_EHCI_BIG_ENDIAN_MMIO
 408         select USB_EHCI_BIG_ENDIAN_DESC
 409         select USB_UHCI_BIG_ENDIAN_MMIO
 410         select USB_UHCI_BIG_ENDIAN_DESC
 411         ---help---
 412           If you say Y here if you are running on a SPARC-LEON processor.
 413           The LEON processor is a synthesizable VHDL model of the
 414           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 415           IP cores that are distributed under GPL. GRLIB can be downloaded
 416           from www.gaisler.com. You can download a sparc-linux cross-compilation
 417           toolchain at www.gaisler.com.
 418
 419 if SPARC_LEON
 420 menu "U-Boot options"
 421
 422 config UBOOT_LOAD_ADDR
 423         hex "uImage Load Address"
 424         default 0x40004000
 425         ---help---
 426          U-Boot kernel load address, the address in physical address space
 427          where u-boot will place the Linux kernel before booting it.
 428          This address is normally the base address of main memory + 0x4000.
 429
 430 config UBOOT_FLASH_ADDR
 431         hex "uImage.o Load Address"
 432         default 0x00080000
 433         ---help---
 434          Optional setting only affecting the uImage.o ELF-image used to
 435          download the uImage file to the target using a ELF-loader other than
 436          U-Boot. It may for example be used to download an uImage to FLASH with
 437          the GRMON utility before even starting u-boot.
 438
 439 config UBOOT_ENTRY_ADDR
 440         hex "uImage Entry Address"
 441         default 0xf0004000
 442         ---help---
 443          Do not change this unless you know what you're doing. This is
 444          hardcoded by the SPARC32 and LEON port.
 445
 446          This is the virtual address u-boot jumps to when booting the Linux
 447          Kernel.
 448
 449 endmenu
 450 endif
 451
 452 endmenu
 453
 454 menu "Bus options (PCI etc.)"
 455 config SBUS
 456         bool
 457         default y
 458
 459 config SBUSCHAR
 460         bool
 461         default y
 462
 463 config SUN_LDOMS
 464         bool "Sun Logical Domains support"
 465         depends on SPARC64
 466         help
 467           Say Y here is you want to support virtual devices via
 468           Logical Domains.
 469
 470 config PCIC_PCI
 471         bool
 472         depends on PCI && SPARC32 && !SPARC_LEON
 473         default y
 474
 475 config LEON_PCI
 476         bool
 477         depends on PCI && SPARC_LEON
 478         default y
 479
 480 config SPARC_GRPCI1
 481         bool "GRPCI Host Bridge Support"
 482         depends on LEON_PCI
 483         default y
 484         help
 485           Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
 486           PCI host controller is typically found in GRLIB SPARC32/LEON
 487           systems. The driver has one property (all_pci_errors) controlled
 488           from the bootloader that makes the GRPCI to generate interrupts
 489           on detected PCI Parity and System errors.
 490
 491 config SPARC_GRPCI2
 492         bool "GRPCI2 Host Bridge Support"
 493         depends on LEON_PCI
 494         default y
 495         help
 496           Say Y here to include the GRPCI2 Host Bridge Driver.
 497
 498 config SUN_OPENPROMFS
 499         tristate "Openprom tree appears in /proc/openprom"
 500         help
 501           If you say Y, the OpenPROM device tree will be available as a
 502           virtual file system, which you can mount to /proc/openprom by "mount
 503           -t openpromfs none /proc/openprom".
 504
 505           To compile the /proc/openprom support as a module, choose M here: the
 506           module will be called openpromfs.
 507
 508           Only choose N if you know in advance that you will not need to modify
 509           OpenPROM settings on the running system.
 510
 511 # Makefile helpers
 512 config SPARC64_PCI
 513         bool
 514         default y
 515         depends on SPARC64 && PCI
 516
 517 config SPARC64_PCI_MSI
 518         bool
 519         default y
 520         depends on SPARC64_PCI && PCI_MSI
 521
 522 endmenu
 523
 524 config COMPAT
 525         bool
 526         depends on SPARC64
 527         default y
 528         select COMPAT_BINFMT_ELF
 529         select HAVE_UID16
 530         select ARCH_WANT_OLD_COMPAT_IPC
 531         select COMPAT_OLD_SIGACTION
 532
 533 config SYSVIPC_COMPAT
 534         bool
 535         depends on COMPAT && SYSVIPC
 536         default y
 537
 538 source "drivers/sbus/char/Kconfig"