1# For a description of the syntax of this configuration file, 2# see Documentation/kbuild/kconfig-language.txt. 3# 4 5mainmenu "Linux/SPARC Kernel Configuration" 6 7config 64BIT 8 bool "64-bit kernel" if ARCH = "sparc" 9 default ARCH = "sparc64" 10 help 11 SPARC is a family of RISC microprocessors designed and marketed by 12 Sun Microsystems, incorporated. They are very widely found in Sun 13 workstations and clones. 14 15 Say yes to build a 64-bit kernel - formerly known as sparc64 16 Say no to build a 32-bit kernel - formerly known as sparc 17 18config SPARC 19 bool 20 default y 21 select OF 22 select HAVE_IDE 23 select HAVE_OPROFILE 24 select HAVE_ARCH_KGDB if !SMP || SPARC64 25 select HAVE_ARCH_TRACEHOOK 26 select ARCH_WANT_OPTIONAL_GPIOLIB 27 select RTC_CLASS 28 select RTC_DRV_M48T59 29 select HAVE_PERF_EVENTS 30 select PERF_USE_VMALLOC 31 select HAVE_DMA_ATTRS 32 select HAVE_DMA_API_DEBUG 33 select HAVE_ARCH_JUMP_LABEL if !CC_OPTIMIZE_FOR_SIZE 34 35config SPARC32 36 def_bool !64BIT 37 38config SPARC64 39 def_bool 64BIT 40 select ARCH_SUPPORTS_MSI 41 select HAVE_FUNCTION_TRACER 42 select HAVE_FUNCTION_GRAPH_TRACER 43 select HAVE_FUNCTION_GRAPH_FP_TEST 44 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 45 select HAVE_KRETPROBES 46 select HAVE_KPROBES 47 select HAVE_MEMBLOCK 48 select HAVE_SYSCALL_WRAPPERS 49 select HAVE_DYNAMIC_FTRACE 50 select HAVE_FTRACE_MCOUNT_RECORD 51 select HAVE_SYSCALL_TRACEPOINTS 52 select USE_GENERIC_SMP_HELPERS if SMP 53 select RTC_DRV_CMOS 54 select RTC_DRV_BQ4802 55 select RTC_DRV_SUN4V 56 select RTC_DRV_STARFIRE 57 select HAVE_PERF_EVENTS 58 select PERF_USE_VMALLOC 59 60config ARCH_DEFCONFIG 61 string 62 default "arch/sparc/configs/sparc32_defconfig" if SPARC32 63 default "arch/sparc/configs/sparc64_defconfig" if SPARC64 64 65# CONFIG_BITS can be used at source level to get 32/64 bits 66config BITS 67 int 68 default 32 if SPARC32 69 default 64 if SPARC64 70 71config ARCH_USES_GETTIMEOFFSET 72 bool 73 default y if SPARC32 74 75config GENERIC_CMOS_UPDATE 76 bool 77 default y 78 79config GENERIC_CLOCKEVENTS 80 bool 81 default y if SPARC64 82 83config IOMMU_HELPER 84 bool 85 default y if SPARC64 86 87config QUICKLIST 88 bool 89 default y if SPARC64 90 91config STACKTRACE_SUPPORT 92 bool 93 default y if SPARC64 94 95config LOCKDEP_SUPPORT 96 bool 97 default y if SPARC64 98 99config HAVE_LATENCYTOP_SUPPORT 100 bool 101 default y if SPARC64 102 103config AUDIT_ARCH 104 bool 105 default y 106 107config HAVE_SETUP_PER_CPU_AREA 108 def_bool y if SPARC64 109 110config NEED_PER_CPU_EMBED_FIRST_CHUNK 111 def_bool y if SPARC64 112 113config NEED_PER_CPU_PAGE_FIRST_CHUNK 114 def_bool y if SPARC64 115 116config GENERIC_HARDIRQS_NO__DO_IRQ 117 bool 118 def_bool y if SPARC64 119 120config MMU 121 bool 122 default y 123 124config HIGHMEM 125 bool 126 default y if SPARC32 127 128config ZONE_DMA 129 bool 130 default y if SPARC32 131 132config NEED_DMA_MAP_STATE 133 def_bool y 134 135config NEED_SG_DMA_LENGTH 136 def_bool y 137 138config GENERIC_ISA_DMA 139 bool 140 default y if SPARC32 141 142config GENERIC_GPIO 143 bool 144 help 145 Generic GPIO API support 146 147config ARCH_NO_VIRT_TO_BUS 148 def_bool y 149 150config ARCH_SUPPORTS_DEBUG_PAGEALLOC 151 def_bool y if SPARC64 152 153source "init/Kconfig" 154 155source "kernel/Kconfig.freezer" 156 157menu "Processor type and features" 158 159config SMP 160 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 161 ---help--- 162 This enables support for systems with more than one CPU. If you have 163 a system with only one CPU, say N. If you have a system with more 164 than one CPU, say Y. 165 166 If you say N here, the kernel will run on single and multiprocessor 167 machines, but will use only one CPU of a multiprocessor machine. If 168 you say Y here, the kernel will run on many, but not all, 169 singleprocessor machines. On a singleprocessor machine, the kernel 170 will run faster if you say N here. 171 172 People using multiprocessor machines who say Y here should also say 173 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 174 Management" code will be disabled if you say Y here. 175 176 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 177 available at <http://www.tldp.org/docs.html#howto>. 178 179 If you don't know what to do here, say N. 180 181config NR_CPUS 182 int "Maximum number of CPUs" 183 depends on SMP 184 range 2 32 if SPARC32 185 range 2 1024 if SPARC64 186 default 32 if SPARC32 187 default 64 if SPARC64 188 189source kernel/Kconfig.hz 190 191config RWSEM_GENERIC_SPINLOCK 192 bool 193 default y if SPARC32 194 195config RWSEM_XCHGADD_ALGORITHM 196 bool 197 default y if SPARC64 198 199config GENERIC_FIND_NEXT_BIT 200 bool 201 default y 202 203config GENERIC_HWEIGHT 204 bool 205 default y if !ULTRA_HAS_POPULATION_COUNT 206 207config GENERIC_CALIBRATE_DELAY 208 bool 209 default y 210 211config ARCH_MAY_HAVE_PC_FDC 212 bool 213 default y 214 215config EMULATED_CMPXCHG 216 bool 217 default y if SPARC32 218 help 219 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 220 is emulated, and therefore it is not completely atomic. 221 222# Makefile helpers 223config SPARC32_SMP 224 bool 225 default y 226 depends on SPARC32 && SMP 227 228config SPARC64_SMP 229 bool 230 default y 231 depends on SPARC64 && SMP 232 233config EARLYFB 234 bool "Support for early boot text console" 235 default y 236 depends on SPARC64 237 help 238 Say Y here to enable a faster early framebuffer boot console. 239 240choice 241 prompt "Kernel page size" if SPARC64 242 default SPARC64_PAGE_SIZE_8KB 243 244config SPARC64_PAGE_SIZE_8KB 245 bool "8KB" 246 help 247 This lets you select the page size of the kernel. 248 249 8KB and 64KB work quite well, since SPARC ELF sections 250 provide for up to 64KB alignment. 251 252 If you don't know what to do, choose 8KB. 253 254config SPARC64_PAGE_SIZE_64KB 255 bool "64KB" 256 257endchoice 258 259config SECCOMP 260 bool "Enable seccomp to safely compute untrusted bytecode" 261 depends on SPARC64 && PROC_FS 262 default y 263 help 264 This kernel feature is useful for number crunching applications 265 that may need to compute untrusted bytecode during their 266 execution. By using pipes or other transports made available to 267 the process as file descriptors supporting the read/write 268 syscalls, it's possible to isolate those applications in 269 their own address space using seccomp. Once seccomp is 270 enabled via /proc/<pid>/seccomp, it cannot be disabled 271 and the task is only allowed to execute a few safe syscalls 272 defined by each seccomp mode. 273 274 If unsure, say Y. Only embedded should say N here. 275 276config HOTPLUG_CPU 277 bool "Support for hot-pluggable CPUs" 278 depends on SPARC64 && SMP 279 select HOTPLUG 280 help 281 Say Y here to experiment with turning CPUs off and on. CPUs 282 can be controlled through /sys/devices/system/cpu/cpu#. 283 Say N if you want to disable CPU hotplug. 284 285config GENERIC_HARDIRQS 286 bool 287 default y if SPARC64 288 289source "kernel/time/Kconfig" 290 291if SPARC64 292source "drivers/cpufreq/Kconfig" 293 294config US3_FREQ 295 tristate "UltraSPARC-III CPU Frequency driver" 296 depends on CPU_FREQ 297 select CPU_FREQ_TABLE 298 help 299 This adds the CPUFreq driver for UltraSPARC-III processors. 300 301 For details, take a look at <file:Documentation/cpu-freq>. 302 303 If in doubt, say N. 304 305config US2E_FREQ 306 tristate "UltraSPARC-IIe CPU Frequency driver" 307 depends on CPU_FREQ 308 select CPU_FREQ_TABLE 309 help 310 This adds the CPUFreq driver for UltraSPARC-IIe processors. 311 312 For details, take a look at <file:Documentation/cpu-freq>. 313 314 If in doubt, say N. 315 316endif 317 318config US3_MC 319 tristate "UltraSPARC-III Memory Controller driver" 320 depends on SPARC64 321 default y 322 help 323 This adds a driver for the UltraSPARC-III memory controller. 324 Loading this driver allows exact mnemonic strings to be 325 printed in the event of a memory error, so that the faulty DIMM 326 on the motherboard can be matched to the error. 327 328 If in doubt, say Y, as this information can be very useful. 329 330# Global things across all Sun machines. 331config GENERIC_LOCKBREAK 332 bool 333 default y 334 depends on SPARC64 && SMP && PREEMPT 335 336choice 337 prompt "SPARC64 Huge TLB Page Size" 338 depends on SPARC64 && HUGETLB_PAGE 339 default HUGETLB_PAGE_SIZE_4MB 340 341config HUGETLB_PAGE_SIZE_4MB 342 bool "4MB" 343 344config HUGETLB_PAGE_SIZE_512K 345 bool "512K" 346 347config HUGETLB_PAGE_SIZE_64K 348 depends on !SPARC64_PAGE_SIZE_64KB 349 bool "64K" 350 351endchoice 352 353config NUMA 354 bool "NUMA support" 355 depends on SPARC64 && SMP 356 357config NODES_SHIFT 358 int 359 default "4" 360 depends on NEED_MULTIPLE_NODES 361 362# Some NUMA nodes have memory ranges that span 363# other nodes. Even though a pfn is valid and 364# between a node's start and end pfns, it may not 365# reside on that node. See memmap_init_zone() 366# for details. 367config NODES_SPAN_OTHER_NODES 368 def_bool y 369 depends on NEED_MULTIPLE_NODES 370 371config ARCH_POPULATES_NODE_MAP 372 def_bool y if SPARC64 373 374config ARCH_SELECT_MEMORY_MODEL 375 def_bool y if SPARC64 376 377config ARCH_SPARSEMEM_ENABLE 378 def_bool y if SPARC64 379 select SPARSEMEM_VMEMMAP_ENABLE 380 381config ARCH_SPARSEMEM_DEFAULT 382 def_bool y if SPARC64 383 384source "mm/Kconfig" 385 386config SCHED_SMT 387 bool "SMT (Hyperthreading) scheduler support" 388 depends on SPARC64 && SMP 389 default y 390 help 391 SMT scheduler support improves the CPU scheduler's decision making 392 when dealing with SPARC cpus at a cost of slightly increased overhead 393 in some places. If unsure say N here. 394 395config SCHED_MC 396 bool "Multi-core scheduler support" 397 depends on SPARC64 && SMP 398 default y 399 help 400 Multi-core scheduler support improves the CPU scheduler's decision 401 making when dealing with multi-core CPU chips at a cost of slightly 402 increased overhead in some places. If unsure say N here. 403 404if SPARC64 405source "kernel/Kconfig.preempt" 406endif 407 408config CMDLINE_BOOL 409 bool "Default bootloader kernel arguments" 410 depends on SPARC64 411 412config CMDLINE 413 string "Initial kernel command string" 414 depends on CMDLINE_BOOL 415 default "console=ttyS0,9600 root=/dev/sda1" 416 help 417 Say Y here if you want to be able to pass default arguments to 418 the kernel. This will be overridden by the bootloader, if you 419 use one (such as SILO). This is most useful if you want to boot 420 a kernel from TFTP, and want default options to be available 421 with having them passed on the command line. 422 423 NOTE: This option WILL override the PROM bootargs setting! 424 425config SUN_PM 426 bool 427 default y if SPARC32 428 help 429 Enable power management and CPU standby features on supported 430 SPARC platforms. 431 432config SPARC_LED 433 tristate "Sun4m LED driver" 434 depends on SPARC32 435 help 436 This driver toggles the front-panel LED on sun4m systems 437 in a user-specifiable manner. Its state can be probed 438 by reading /proc/led and its blinking mode can be changed 439 via writes to /proc/led 440 441config SERIAL_CONSOLE 442 bool 443 depends on SPARC32 444 default y 445 ---help--- 446 If you say Y here, it will be possible to use a serial port as the 447 system console (the system console is the device which receives all 448 kernel messages and warnings and which allows logins in single user 449 mode). This could be useful if some terminal or printer is connected 450 to that serial port. 451 452 Even if you say Y here, the currently visible virtual console 453 (/dev/tty0) will still be used as the system console by default, but 454 you can alter that using a kernel command line option such as 455 "console=ttyS1". (Try "man bootparam" or see the documentation of 456 your boot loader (silo) about how to pass options to the kernel at 457 boot time.) 458 459 If you don't have a graphics card installed and you say Y here, the 460 kernel will automatically use the first serial line, /dev/ttyS0, as 461 system console. 462 463 If unsure, say N. 464 465config SPARC_LEON 466 bool "Sparc Leon processor family" 467 depends on SPARC32 468 ---help--- 469 If you say Y here if you are running on a SPARC-LEON processor. 470 The LEON processor is a synthesizable VHDL model of the 471 SPARC-v8 standard. LEON is part of the GRLIB collection of 472 IP cores that are distributed under GPL. GRLIB can be downloaded 473 from www.gaisler.com. You can download a sparc-linux cross-compilation 474 toolchain at www.gaisler.com. 475 476endmenu 477 478menu "Bus options (PCI etc.)" 479config SBUS 480 bool 481 default y 482 483config SBUSCHAR 484 bool 485 default y 486 487config SUN_LDOMS 488 bool "Sun Logical Domains support" 489 depends on SPARC64 490 help 491 Say Y here is you want to support virtual devices via 492 Logical Domains. 493 494config PCI 495 bool "Support for PCI and PS/2 keyboard/mouse" 496 help 497 Find out whether your system includes a PCI bus. PCI is the name of 498 a bus system, i.e. the way the CPU talks to the other stuff inside 499 your box. If you say Y here, the kernel will include drivers and 500 infrastructure code to support PCI bus devices. 501 502 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 503 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 504 All of these platforms are extremely obscure, so say N if unsure. 505 506config PCI_DOMAINS 507 def_bool PCI if SPARC64 508 509config PCI_SYSCALL 510 def_bool PCI 511 512source "drivers/pci/Kconfig" 513 514source "drivers/pcmcia/Kconfig" 515 516config SUN_OPENPROMFS 517 tristate "Openprom tree appears in /proc/openprom" 518 help 519 If you say Y, the OpenPROM device tree will be available as a 520 virtual file system, which you can mount to /proc/openprom by "mount 521 -t openpromfs none /proc/openprom". 522 523 To compile the /proc/openprom support as a module, choose M here: the 524 module will be called openpromfs. 525 526 Only choose N if you know in advance that you will not need to modify 527 OpenPROM settings on the running system. 528 529# Makefile helpers 530config SPARC32_PCI 531 bool 532 default y 533 depends on SPARC32 && PCI 534 535config SPARC64_PCI 536 bool 537 default y 538 depends on SPARC64 && PCI 539 540endmenu 541 542menu "Executable file formats" 543 544source "fs/Kconfig.binfmt" 545 546config COMPAT 547 bool 548 depends on SPARC64 549 default y 550 select COMPAT_BINFMT_ELF 551 552config SYSVIPC_COMPAT 553 bool 554 depends on COMPAT && SYSVIPC 555 default y 556 557endmenu 558 559source "net/Kconfig" 560 561source "drivers/Kconfig" 562 563source "drivers/sbus/char/Kconfig" 564 565source "fs/Kconfig" 566 567source "arch/sparc/Kconfig.debug" 568 569source "security/Kconfig" 570 571source "crypto/Kconfig" 572 573source "lib/Kconfig" 574