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_DEBUG_KMEMLEAK
  75         select IOMMU_HELPER
  76         select SPARSE_IRQ
  77         select RTC_DRV_CMOS
  78         select RTC_DRV_BQ4802
  79         select RTC_DRV_SUN4V
  80         select RTC_DRV_STARFIRE
  81         select HAVE_PERF_EVENTS
  82         select PERF_USE_VMALLOC
  83         select IRQ_PREFLOW_FASTEOI
  84         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  85         select HAVE_C_RECORDMCOUNT
  86         select HAVE_ARCH_AUDITSYSCALL
  87         select ARCH_SUPPORTS_ATOMIC_RMW
  88         select HAVE_NMI
  89         select HAVE_REGS_AND_STACK_ACCESS_API
  90         select ARCH_USE_QUEUED_RWLOCKS
  91         select ARCH_USE_QUEUED_SPINLOCKS
  92         select GENERIC_TIME_VSYSCALL
  93         select ARCH_CLOCKSOURCE_DATA
  94         select ARCH_HAS_PTE_SPECIAL
  95         select PCI_DOMAINS if PCI
  96         select ARCH_HAS_GIGANTIC_PAGE
  97
  98 config ARCH_DEFCONFIG
  99         string
 100         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
 101         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
 102
 103 config ARCH_PROC_KCORE_TEXT
 104         def_bool y
 105
 106 config CPU_BIG_ENDIAN
 107         def_bool y
 108
 109 config ARCH_ATU
 110         bool
 111         default y if SPARC64
 112
 113 config STACKTRACE_SUPPORT
 114         bool
 115         default y if SPARC64
 116
 117 config LOCKDEP_SUPPORT
 118         bool
 119         default y if SPARC64
 120
 121 config ARCH_HIBERNATION_POSSIBLE
 122         def_bool y if SPARC64
 123
 124 config AUDIT_ARCH
 125         bool
 126         default y
 127
 128 config HAVE_SETUP_PER_CPU_AREA
 129         def_bool y if SPARC64
 130
 131 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 132         def_bool y if SPARC64
 133
 134 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 135         def_bool y if SPARC64
 136
 137 config MMU
 138         bool
 139         default y
 140
 141 config HIGHMEM
 142         bool
 143         default y if SPARC32
 144
 145 config ZONE_DMA
 146         bool
 147         default y if SPARC32
 148
 149 config GENERIC_ISA_DMA
 150         bool
 151         default y if SPARC32
 152
 153 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 154         def_bool y if SPARC64
 155
 156 config PGTABLE_LEVELS
 157         default 4 if 64BIT
 158         default 3
 159
 160 config ARCH_SUPPORTS_UPROBES
 161         def_bool y if SPARC64
 162
 163 menu "Processor type and features"
 164
 165 config SMP
 166         bool "Symmetric multi-processing support"
 167         ---help---
 168           This enables support for systems with more than one CPU. If you have
 169           a system with only one CPU, say N. If you have a system with more
 170           than one CPU, say Y.
 171
 172           If you say N here, the kernel will run on uni- and multiprocessor
 173           machines, but will use only one CPU of a multiprocessor machine. If
 174           you say Y here, the kernel will run on many, but not all,
 175           uniprocessor machines. On a uniprocessor machine, the kernel
 176           will run faster if you say N here.
 177
 178           People using multiprocessor machines who say Y here should also say
 179           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 180           Management" code will be disabled if you say Y here.
 181
 182           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 183           available at <http://www.tldp.org/docs.html#howto>.
 184
 185           If you don't know what to do here, say N.
 186
 187 config NR_CPUS
 188         int "Maximum number of CPUs"
 189         depends on SMP
 190         range 2 32 if SPARC32
 191         range 2 4096 if SPARC64
 192         default 32 if SPARC32
 193         default 4096 if SPARC64
 194
 195 source "kernel/Kconfig.hz"
 196
 197 config GENERIC_HWEIGHT
 198         bool
 199         default y
 200
 201 config GENERIC_CALIBRATE_DELAY
 202         bool
 203         default y
 204
 205 config ARCH_MAY_HAVE_PC_FDC
 206         bool
 207         default y
 208
 209 config EMULATED_CMPXCHG
 210         bool
 211         default y if SPARC32
 212         help
 213           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 214           is emulated, and therefore it is not completely atomic.
 215
 216 # Makefile helpers
 217 config SPARC32_SMP
 218         bool
 219         default y
 220         depends on SPARC32 && SMP
 221
 222 config SPARC64_SMP
 223         bool
 224         default y
 225         depends on SPARC64 && SMP
 226
 227 config EARLYFB
 228         bool "Support for early boot text console"
 229         default y
 230         depends on SPARC64
 231         help
 232           Say Y here to enable a faster early framebuffer boot console.
 233
 234 config SECCOMP
 235         bool "Enable seccomp to safely compute untrusted bytecode"
 236         depends on SPARC64 && PROC_FS
 237         default y
 238         help
 239           This kernel feature is useful for number crunching applications
 240           that may need to compute untrusted bytecode during their
 241           execution. By using pipes or other transports made available to
 242           the process as file descriptors supporting the read/write
 243           syscalls, it's possible to isolate those applications in
 244           their own address space using seccomp. Once seccomp is
 245           enabled via /proc/<pid>/seccomp, it cannot be disabled
 246           and the task is only allowed to execute a few safe syscalls
 247           defined by each seccomp mode.
 248
 249           If unsure, say Y. Only embedded should say N here.
 250
 251 config HOTPLUG_CPU
 252         bool "Support for hot-pluggable CPUs"
 253         depends on SPARC64 && SMP
 254         help
 255           Say Y here to experiment with turning CPUs off and on.  CPUs
 256           can be controlled through /sys/devices/system/cpu/cpu#.
 257           Say N if you want to disable CPU hotplug.
 258
 259 if SPARC64
 260 source "drivers/cpufreq/Kconfig"
 261 endif
 262
 263 config US3_MC
 264         tristate "UltraSPARC-III Memory Controller driver"
 265         depends on SPARC64
 266         default y
 267         help
 268           This adds a driver for the UltraSPARC-III memory controller.
 269           Loading this driver allows exact mnemonic strings to be
 270           printed in the event of a memory error, so that the faulty DIMM
 271           on the motherboard can be matched to the error.
 272
 273           If in doubt, say Y, as this information can be very useful.
 274
 275 # Global things across all Sun machines.
 276 config GENERIC_LOCKBREAK
 277         bool
 278         default y
 279         depends on SPARC64 && SMP && PREEMPTION
 280
 281 config NUMA
 282         bool "NUMA support"
 283         depends on SPARC64 && SMP
 284
 285 config NODES_SHIFT
 286         int "Maximum NUMA Nodes (as a power of 2)"
 287         range 4 5 if SPARC64
 288         default "5"
 289         depends on NEED_MULTIPLE_NODES
 290         help
 291           Specify the maximum number of NUMA Nodes available on the target
 292           system.  Increases memory reserved to accommodate various tables.
 293
 294 # Some NUMA nodes have memory ranges that span
 295 # other nodes.  Even though a pfn is valid and
 296 # between a node's start and end pfns, it may not
 297 # reside on that node.  See memmap_init_zone()
 298 # for details.
 299 config NODES_SPAN_OTHER_NODES
 300         def_bool y
 301         depends on NEED_MULTIPLE_NODES
 302
 303 config ARCH_SPARSEMEM_ENABLE
 304         def_bool y if SPARC64
 305         select SPARSEMEM_VMEMMAP_ENABLE
 306
 307 config ARCH_SPARSEMEM_DEFAULT
 308         def_bool y if SPARC64
 309
 310 config FORCE_MAX_ZONEORDER
 311         int "Maximum zone order"
 312         default "13"
 313         help
 314           The kernel memory allocator divides physically contiguous memory
 315           blocks into "zones", where each zone is a power of two number of
 316           pages.  This option selects the largest power of two that the kernel
 317           keeps in the memory allocator.  If you need to allocate very large
 318           blocks of physically contiguous memory, then you may need to
 319           increase this value.
 320
 321           This config option is actually maximum order plus one. For example,
 322           a value of 13 means that the largest free memory block is 2^12 pages.
 323
 324 if SPARC64
 325 source "kernel/power/Kconfig"
 326 endif
 327
 328 config SCHED_SMT
 329         bool "SMT (Hyperthreading) scheduler support"
 330         depends on SPARC64 && SMP
 331         default y
 332         help
 333           SMT scheduler support improves the CPU scheduler's decision making
 334           when dealing with SPARC cpus at a cost of slightly increased overhead
 335           in some places. If unsure say N here.
 336
 337 config SCHED_MC
 338         bool "Multi-core scheduler support"
 339         depends on SPARC64 && SMP
 340         default y
 341         help
 342           Multi-core scheduler support improves the CPU scheduler's decision
 343           making when dealing with multi-core CPU chips at a cost of slightly
 344           increased overhead in some places. If unsure say N here.
 345
 346 config CMDLINE_BOOL
 347         bool "Default bootloader kernel arguments"
 348         depends on SPARC64
 349
 350 config CMDLINE
 351         string "Initial kernel command string"
 352         depends on CMDLINE_BOOL
 353         default "console=ttyS0,9600 root=/dev/sda1"
 354         help
 355           Say Y here if you want to be able to pass default arguments to
 356           the kernel. This will be overridden by the bootloader, if you
 357           use one (such as SILO). This is most useful if you want to boot
 358           a kernel from TFTP, and want default options to be available
 359           with having them passed on the command line.
 360
 361           NOTE: This option WILL override the PROM bootargs setting!
 362
 363 config SUN_PM
 364         bool
 365         default y if SPARC32
 366         help
 367           Enable power management and CPU standby features on supported
 368           SPARC platforms.
 369
 370 config SPARC_LED
 371         tristate "Sun4m LED driver"
 372         depends on SPARC32
 373         help
 374           This driver toggles the front-panel LED on sun4m systems
 375           in a user-specifiable manner.  Its state can be probed
 376           by reading /proc/led and its blinking mode can be changed
 377           via writes to /proc/led
 378
 379 config SERIAL_CONSOLE
 380         bool
 381         depends on SPARC32
 382         default y
 383         ---help---
 384           If you say Y here, it will be possible to use a serial port as the
 385           system console (the system console is the device which receives all
 386           kernel messages and warnings and which allows logins in single user
 387           mode). This could be useful if some terminal or printer is connected
 388           to that serial port.
 389
 390           Even if you say Y here, the currently visible virtual console
 391           (/dev/tty0) will still be used as the system console by default, but
 392           you can alter that using a kernel command line option such as
 393           "console=ttyS1". (Try "man bootparam" or see the documentation of
 394           your boot loader (silo) about how to pass options to the kernel at
 395           boot time.)
 396
 397           If you don't have a graphics card installed and you say Y here, the
 398           kernel will automatically use the first serial line, /dev/ttyS0, as
 399           system console.
 400
 401           If unsure, say N.
 402
 403 config SPARC_LEON
 404         bool "Sparc Leon processor family"
 405         depends on SPARC32
 406         select USB_EHCI_BIG_ENDIAN_MMIO
 407         select USB_EHCI_BIG_ENDIAN_DESC
 408         select USB_UHCI_BIG_ENDIAN_MMIO
 409         select USB_UHCI_BIG_ENDIAN_DESC
 410         ---help---
 411           If you say Y here if you are running on a SPARC-LEON processor.
 412           The LEON processor is a synthesizable VHDL model of the
 413           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 414           IP cores that are distributed under GPL. GRLIB can be downloaded
 415           from www.gaisler.com. You can download a sparc-linux cross-compilation
 416           toolchain at www.gaisler.com.
 417
 418 if SPARC_LEON
 419 menu "U-Boot options"
 420
 421 config UBOOT_LOAD_ADDR
 422         hex "uImage Load Address"
 423         default 0x40004000
 424         ---help---
 425          U-Boot kernel load address, the address in physical address space
 426          where u-boot will place the Linux kernel before booting it.
 427          This address is normally the base address of main memory + 0x4000.
 428
 429 config UBOOT_FLASH_ADDR
 430         hex "uImage.o Load Address"
 431         default 0x00080000
 432         ---help---
 433          Optional setting only affecting the uImage.o ELF-image used to
 434          download the uImage file to the target using a ELF-loader other than
 435          U-Boot. It may for example be used to download an uImage to FLASH with
 436          the GRMON utility before even starting u-boot.
 437
 438 config UBOOT_ENTRY_ADDR
 439         hex "uImage Entry Address"
 440         default 0xf0004000
 441         ---help---
 442          Do not change this unless you know what you're doing. This is
 443          hardcoded by the SPARC32 and LEON port.
 444
 445          This is the virtual address u-boot jumps to when booting the Linux
 446          Kernel.
 447
 448 endmenu
 449 endif
 450
 451 endmenu
 452
 453 menu "Bus options (PCI etc.)"
 454 config SBUS
 455         bool
 456         default y
 457
 458 config SBUSCHAR
 459         bool
 460         default y
 461
 462 config SUN_LDOMS
 463         bool "Sun Logical Domains support"
 464         depends on SPARC64
 465         help
 466           Say Y here is you want to support virtual devices via
 467           Logical Domains.
 468
 469 config PCIC_PCI
 470         bool
 471         depends on PCI && SPARC32 && !SPARC_LEON
 472         default y
 473
 474 config LEON_PCI
 475         bool
 476         depends on PCI && SPARC_LEON
 477         default y
 478
 479 config SPARC_GRPCI1
 480         bool "GRPCI Host Bridge Support"
 481         depends on LEON_PCI
 482         default y
 483         help
 484           Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
 485           PCI host controller is typically found in GRLIB SPARC32/LEON
 486           systems. The driver has one property (all_pci_errors) controlled
 487           from the bootloader that makes the GRPCI to generate interrupts
 488           on detected PCI Parity and System errors.
 489
 490 config SPARC_GRPCI2
 491         bool "GRPCI2 Host Bridge Support"
 492         depends on LEON_PCI
 493         default y
 494         help
 495           Say Y here to include the GRPCI2 Host Bridge Driver.
 496
 497 config SUN_OPENPROMFS
 498         tristate "Openprom tree appears in /proc/openprom"
 499         help
 500           If you say Y, the OpenPROM device tree will be available as a
 501           virtual file system, which you can mount to /proc/openprom by "mount
 502           -t openpromfs none /proc/openprom".
 503
 504           To compile the /proc/openprom support as a module, choose M here: the
 505           module will be called openpromfs.
 506
 507           Only choose N if you know in advance that you will not need to modify
 508           OpenPROM settings on the running system.
 509
 510 # Makefile helpers
 511 config SPARC64_PCI
 512         bool
 513         default y
 514         depends on SPARC64 && PCI
 515
 516 config SPARC64_PCI_MSI
 517         bool
 518         default y
 519         depends on SPARC64_PCI && PCI_MSI
 520
 521 endmenu
 522
 523 config COMPAT
 524         bool
 525         depends on SPARC64
 526         default y
 527         select COMPAT_BINFMT_ELF
 528         select HAVE_UID16
 529         select ARCH_WANT_OLD_COMPAT_IPC
 530         select COMPAT_OLD_SIGACTION
 531
 532 config SYSVIPC_COMPAT
 533         bool
 534         depends on COMPAT && SYSVIPC
 535         default y
 536
 537 source "drivers/sbus/char/Kconfig"