arch/ia64/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "IA-64 Linux Kernel Configuration"
   7
   8 source "init/Kconfig"
   9
  10 menu "Processor type and features"
  11
  12 config IA64
  13         bool
  14         default y
  15         help
  16           The Itanium Processor Family is Intel's 64-bit successor to
  17           the 32-bit X86 line.  The IA-64 Linux project has a home
  18           page at <http://www.linuxia64.org/> and a mailing list at
  19           <linux-ia64@vger.kernel.org>.
  20
  21 config 64BIT
  22         bool
  23         default y
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config SWIOTLB
  30        bool
  31        default y
  32
  33 config RWSEM_XCHGADD_ALGORITHM
  34         bool
  35         default y
  36
  37 config GENERIC_FIND_NEXT_BIT
  38         bool
  39         default y
  40
  41 config GENERIC_CALIBRATE_DELAY
  42         bool
  43         default y
  44
  45 config TIME_INTERPOLATION
  46         bool
  47         default y
  48
  49 config DMI
  50         bool
  51         default y
  52
  53 config EFI
  54         bool
  55         default y
  56
  57 config GENERIC_IOMAP
  58         bool
  59         default y
  60
  61 config SCHED_NO_NO_OMIT_FRAME_POINTER
  62         bool
  63         default y
  64
  65 config IA64_UNCACHED_ALLOCATOR
  66         bool
  67         select GENERIC_ALLOCATOR
  68
  69 config DMA_IS_DMA32
  70         bool
  71         default y
  72
  73 choice
  74         prompt "System type"
  75         default IA64_GENERIC
  76
  77 config IA64_GENERIC
  78         bool "generic"
  79         select ACPI
  80         select PCI
  81         select NUMA
  82         select ACPI_NUMA
  83         help
  84           This selects the system type of your hardware.  A "generic" kernel
  85           will run on any supported IA-64 system.  However, if you configure
  86           a kernel for your specific system, it will be faster and smaller.
  87
  88           generic               For any supported IA-64 system
  89           DIG-compliant         For DIG ("Developer's Interface Guide") compliant systems
  90           HP-zx1/sx1000         For HP systems
  91           HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
  92           SGI-SN2               For SGI Altix systems
  93           Ski-simulator         For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
  94
  95           If you don't know what to do, choose "generic".
  96
  97 config IA64_DIG
  98         bool "DIG-compliant"
  99
 100 config IA64_HP_ZX1
 101         bool "HP-zx1/sx1000"
 102         help
 103           Build a kernel that runs on HP zx1 and sx1000 systems.  This adds
 104           support for the HP I/O MMU.
 105
 106 config IA64_HP_ZX1_SWIOTLB
 107         bool "HP-zx1/sx1000 with software I/O TLB"
 108         help
 109           Build a kernel that runs on HP zx1 and sx1000 systems even when they
 110           have broken PCI devices which cannot DMA to full 32 bits.  Apart
 111           from support for the HP I/O MMU, this includes support for the software
 112           I/O TLB, which allows supporting the broken devices at the expense of
 113           wasting some kernel memory (about 2MB by default).
 114
 115 config IA64_SGI_SN2
 116         bool "SGI-SN2"
 117         help
 118           Selecting this option will optimize the kernel for use on sn2 based
 119           systems, but the resulting kernel binary will not run on other
 120           types of ia64 systems.  If you have an SGI Altix system, it's safe
 121           to select this option.  If in doubt, select ia64 generic support
 122           instead.
 123
 124 config IA64_HP_SIM
 125         bool "Ski-simulator"
 126
 127 endchoice
 128
 129 choice
 130         prompt "Processor type"
 131         default ITANIUM
 132
 133 config ITANIUM
 134         bool "Itanium"
 135         help
 136           Select your IA-64 processor type.  The default is Itanium.
 137           This choice is safe for all IA-64 systems, but may not perform
 138           optimally on systems with, say, Itanium 2 or newer processors.
 139
 140 config MCKINLEY
 141         bool "Itanium 2"
 142         help
 143           Select this to configure for an Itanium 2 (McKinley) processor.
 144
 145 endchoice
 146
 147 choice
 148         prompt "Kernel page size"
 149         default IA64_PAGE_SIZE_16KB
 150
 151 config IA64_PAGE_SIZE_4KB
 152         bool "4KB"
 153         help
 154           This lets you select the page size of the kernel.  For best IA-64
 155           performance, a page size of 8KB or 16KB is recommended.  For best
 156           IA-32 compatibility, a page size of 4KB should be selected (the vast
 157           majority of IA-32 binaries work perfectly fine with a larger page
 158           size).  For Itanium 2 or newer systems, a page size of 64KB can also
 159           be selected.
 160
 161           4KB                For best IA-32 compatibility
 162           8KB                For best IA-64 performance
 163           16KB               For best IA-64 performance
 164           64KB               Requires Itanium 2 or newer processor.
 165
 166           If you don't know what to do, choose 16KB.
 167
 168 config IA64_PAGE_SIZE_8KB
 169         bool "8KB"
 170
 171 config IA64_PAGE_SIZE_16KB
 172         bool "16KB"
 173
 174 config IA64_PAGE_SIZE_64KB
 175         depends on !ITANIUM
 176         bool "64KB"
 177
 178 endchoice
 179
 180 choice
 181         prompt "Page Table Levels"
 182         default PGTABLE_3
 183
 184 config PGTABLE_3
 185         bool "3 Levels"
 186
 187 config PGTABLE_4
 188         depends on !IA64_PAGE_SIZE_64KB
 189         bool "4 Levels"
 190
 191 endchoice
 192
 193 source kernel/Kconfig.hz
 194
 195 config IA64_BRL_EMU
 196         bool
 197         depends on ITANIUM
 198         default y
 199
 200 # align cache-sensitive data to 128 bytes
 201 config IA64_L1_CACHE_SHIFT
 202         int
 203         default "7" if MCKINLEY
 204         default "6" if ITANIUM
 205
 206 config IA64_CYCLONE
 207         bool "Cyclone (EXA) Time Source support"
 208         help
 209           Say Y here to enable support for IBM EXA Cyclone time source.
 210           If you're unsure, answer N.
 211
 212 config IOSAPIC
 213         bool
 214         depends on !IA64_HP_SIM
 215         default y
 216
 217 config IA64_SGI_SN_XP
 218         tristate "Support communication between SGI SSIs"
 219         depends on IA64_GENERIC || IA64_SGI_SN2
 220         select IA64_UNCACHED_ALLOCATOR
 221         help
 222           An SGI machine can be divided into multiple Single System
 223           Images which act independently of each other and have
 224           hardware based memory protection from the others.  Enabling
 225           this feature will allow for direct communication between SSIs
 226           based on a network adapter and DMA messaging.
 227
 228 config FORCE_MAX_ZONEORDER
 229         int "MAX_ORDER (11 - 17)"  if !HUGETLB_PAGE
 230         range 11 17  if !HUGETLB_PAGE
 231         default "17" if HUGETLB_PAGE
 232         default "11"
 233
 234 config SMP
 235         bool "Symmetric multi-processing support"
 236         help
 237           This enables support for systems with more than one CPU. If you have
 238           a system with only one CPU, say N.  If you have a system with more
 239           than one CPU, say Y.
 240
 241           If you say N here, the kernel will run on single and multiprocessor
 242           systems, but will use only one CPU of a multiprocessor system.  If
 243           you say Y here, the kernel will run on many, but not all,
 244           single processor systems.  On a single processor system, the kernel
 245           will run faster if you say N here.
 246
 247           See also the <file:Documentation/smp.txt> and the SMP-HOWTO
 248           available at <http://www.tldp.org/docs.html#howto>.
 249
 250           If you don't know what to do here, say N.
 251
 252 config NR_CPUS
 253         int "Maximum number of CPUs (2-1024)"
 254         range 2 1024
 255         depends on SMP
 256         default "64"
 257         help
 258           You should set this to the number of CPUs in your system, but
 259           keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
 260           only use 2 CPUs on a >2 CPU system.  Setting this to a value larger
 261           than 64 will cause the use of a CPU mask array, causing a small
 262           performance hit.
 263
 264 config HOTPLUG_CPU
 265         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 266         depends on SMP && EXPERIMENTAL
 267         select HOTPLUG
 268         default n
 269         ---help---
 270           Say Y here to experiment with turning CPUs off and on.  CPUs
 271           can be controlled through /sys/devices/system/cpu/cpu#.
 272           Say N if you want to disable CPU hotplug.
 273
 274 config SCHED_SMT
 275         bool "SMT scheduler support"
 276         depends on SMP
 277         help
 278           Improves the CPU scheduler's decision making when dealing with
 279           Intel IA64 chips with MultiThreading at a cost of slightly increased
 280           overhead in some places. If unsure say N here.
 281
 282 config PERMIT_BSP_REMOVE
 283         bool "Support removal of Bootstrap Processor"
 284         depends on HOTPLUG_CPU
 285         default n
 286         ---help---
 287         Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
 288         support.
 289
 290 config FORCE_CPEI_RETARGET
 291         bool "Force assumption that CPEI can be re-targetted"
 292         depends on PERMIT_BSP_REMOVE
 293         default n
 294         ---help---
 295         Say Y if you need to force the assumption that CPEI can be re-targetted to
 296         any cpu in the system. This hint is available via ACPI 3.0 specifications.
 297         Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
 298         This option it useful to enable this feature on older BIOS's as well.
 299         You can also enable this by using boot command line option force_cpei=1.
 300
 301 config PREEMPT
 302         bool "Preemptible Kernel"
 303         help
 304           This option reduces the latency of the kernel when reacting to
 305           real-time or interactive events by allowing a low priority process to
 306           be preempted even if it is in kernel mode executing a system call.
 307           This allows applications to run more reliably even when the system is
 308           under load.
 309
 310           Say Y here if you are building a kernel for a desktop, embedded
 311           or real-time system.  Say N if you are unsure.
 312
 313 source "mm/Kconfig"
 314
 315 config ARCH_SELECT_MEMORY_MODEL
 316         def_bool y
 317
 318 config ARCH_DISCONTIGMEM_ENABLE
 319         def_bool y
 320         help
 321           Say Y to support efficient handling of discontiguous physical memory,
 322           for architectures which are either NUMA (Non-Uniform Memory Access)
 323           or have huge holes in the physical address space for other reasons.
 324           See <file:Documentation/vm/numa> for more.
 325
 326 config ARCH_FLATMEM_ENABLE
 327         def_bool y
 328
 329 config ARCH_SPARSEMEM_ENABLE
 330         def_bool y
 331         depends on ARCH_DISCONTIGMEM_ENABLE
 332
 333 config ARCH_DISCONTIGMEM_DEFAULT
 334         def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
 335         depends on ARCH_DISCONTIGMEM_ENABLE
 336
 337 config NUMA
 338         bool "NUMA support"
 339         depends on !IA64_HP_SIM && !FLATMEM
 340         default y if IA64_SGI_SN2
 341         help
 342           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 343           Access).  This option is for configuring high-end multiprocessor
 344           server systems.  If in doubt, say N.
 345
 346 config NODES_SHIFT
 347         int "Max num nodes shift(3-10)"
 348         range 3 10
 349         default "8"
 350         depends on NEED_MULTIPLE_NODES
 351         help
 352           This option specifies the maximum number of nodes in your SSI system.
 353           MAX_NUMNODES will be 2^(This value).
 354           If in doubt, use the default.
 355
 356 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
 357 # VIRTUAL_MEM_MAP has been retained for historical reasons.
 358 config VIRTUAL_MEM_MAP
 359         bool "Virtual mem map"
 360         depends on !SPARSEMEM
 361         default y if !IA64_HP_SIM
 362         help
 363           Say Y to compile the kernel with support for a virtual mem map.
 364           This code also only takes effect if a memory hole of greater than
 365           1 Gb is found during boot.  You must turn this option on if you
 366           require the DISCONTIGMEM option for your machine. If you are
 367           unsure, say Y.
 368
 369 config HOLES_IN_ZONE
 370         bool
 371         default y if VIRTUAL_MEM_MAP
 372
 373 config HAVE_ARCH_EARLY_PFN_TO_NID
 374         def_bool y
 375         depends on NEED_MULTIPLE_NODES
 376
 377 config HAVE_ARCH_NODEDATA_EXTENSION
 378         def_bool y
 379         depends on NUMA
 380
 381 config IA32_SUPPORT
 382         bool "Support for Linux/x86 binaries"
 383         help
 384           IA-64 processors can execute IA-32 (X86) instructions.  By
 385           saying Y here, the kernel will include IA-32 system call
 386           emulation support which makes it possible to transparently
 387           run IA-32 Linux binaries on an IA-64 Linux system.
 388           If in doubt, say Y.
 389
 390 config COMPAT
 391         bool
 392         depends on IA32_SUPPORT
 393         default y
 394
 395 config IA64_MCA_RECOVERY
 396         tristate "MCA recovery from errors other than TLB."
 397
 398 config PERFMON
 399         bool "Performance monitor support"
 400         help
 401           Selects whether support for the IA-64 performance monitor hardware
 402           is included in the kernel.  This makes some kernel data-structures a
 403           little bigger and slows down execution a bit, but it is generally
 404           a good idea to turn this on.  If you're unsure, say Y.
 405
 406 config IA64_PALINFO
 407         tristate "/proc/pal support"
 408         help
 409           If you say Y here, you are able to get PAL (Processor Abstraction
 410           Layer) information in /proc/pal.  This contains useful information
 411           about the processors in your systems, such as cache and TLB sizes
 412           and the PAL firmware version in use.
 413
 414           To use this option, you have to ensure that the "/proc file system
 415           support" (CONFIG_PROC_FS) is enabled, too.
 416
 417 config SGI_SN
 418         def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
 419
 420 source "drivers/sn/Kconfig"
 421
 422 source "drivers/firmware/Kconfig"
 423
 424 source "fs/Kconfig.binfmt"
 425
 426 endmenu
 427
 428 menu "Power management and ACPI"
 429
 430 source "kernel/power/Kconfig"
 431
 432 source "drivers/acpi/Kconfig"
 433
 434 if PM
 435
 436 source "arch/ia64/kernel/cpufreq/Kconfig"
 437
 438 endif
 439
 440 endmenu
 441
 442 if !IA64_HP_SIM
 443
 444 menu "Bus options (PCI, PCMCIA)"
 445
 446 config PCI
 447         bool "PCI support"
 448         help
 449           Real IA-64 machines all have PCI/PCI-X/PCI Express busses.  Say Y
 450           here unless you are using a simulator without PCI support.
 451
 452 config PCI_DOMAINS
 453         bool
 454         default PCI
 455
 456 source "drivers/pci/pcie/Kconfig"
 457
 458 source "drivers/pci/Kconfig"
 459
 460 source "drivers/pci/hotplug/Kconfig"
 461
 462 source "drivers/pcmcia/Kconfig"
 463
 464 endmenu
 465
 466 endif
 467
 468 source "net/Kconfig"
 469
 470 source "drivers/Kconfig"
 471
 472 source "fs/Kconfig"
 473
 474 source "lib/Kconfig"
 475
 476 #
 477 # Use the generic interrupt handling code in kernel/irq/:
 478 #
 479 config GENERIC_HARDIRQS
 480         bool
 481         default y
 482
 483 config GENERIC_IRQ_PROBE
 484         bool
 485         default y
 486
 487 config GENERIC_PENDING_IRQ
 488         bool
 489         depends on GENERIC_HARDIRQS && SMP
 490         default y
 491
 492 source "arch/ia64/hp/sim/Kconfig"
 493
 494 menu "Instrumentation Support"
 495         depends on EXPERIMENTAL
 496
 497 source "arch/ia64/oprofile/Kconfig"
 498
 499 config KPROBES
 500         bool "Kprobes (EXPERIMENTAL)"
 501         depends on EXPERIMENTAL && MODULES
 502         help
 503           Kprobes allows you to trap at almost any kernel address and
 504           execute a callback function.  register_kprobe() establishes
 505           a probepoint and specifies the callback.  Kprobes is useful
 506           for kernel debugging, non-intrusive instrumentation and testing.
 507           If in doubt, say "N".
 508 endmenu
 509
 510 source "arch/ia64/Kconfig.debug"
 511
 512 source "security/Kconfig"
 513
 514 source "crypto/Kconfig"