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