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 source kernel/Kconfig.hz
 168
 169 config IA64_BRL_EMU
 170         bool
 171         depends on ITANIUM
 172         default y
 173
 174 # align cache-sensitive data to 128 bytes
 175 config IA64_L1_CACHE_SHIFT
 176         int
 177         default "7" if MCKINLEY
 178         default "6" if ITANIUM
 179
 180 # align cache-sensitive data to 64 bytes
 181 config IA64_CYCLONE
 182         bool "Cyclone (EXA) Time Source support"
 183         help
 184           Say Y here to enable support for IBM EXA Cyclone time source.
 185           If you're unsure, answer N.
 186
 187 config IOSAPIC
 188         bool
 189         depends on !IA64_HP_SIM
 190         default y
 191
 192 config IA64_SGI_SN_XP
 193         tristate "Support communication between SGI SSIs"
 194         depends on IA64_GENERIC || IA64_SGI_SN2
 195         select IA64_UNCACHED_ALLOCATOR
 196         help
 197           An SGI machine can be divided into multiple Single System
 198           Images which act independently of each other and have
 199           hardware based memory protection from the others.  Enabling
 200           this feature will allow for direct communication between SSIs
 201           based on a network adapter and DMA messaging.
 202
 203 config FORCE_MAX_ZONEORDER
 204         int "MAX_ORDER (11 - 17)"  if !HUGETLB_PAGE
 205         range 11 17  if !HUGETLB_PAGE
 206         default "17" if HUGETLB_PAGE
 207         default "11"
 208
 209 config SMP
 210         bool "Symmetric multi-processing support"
 211         help
 212           This enables support for systems with more than one CPU. If you have
 213           a system with only one CPU, say N.  If you have a system with more
 214           than one CPU, say Y.
 215
 216           If you say N here, the kernel will run on single and multiprocessor
 217           systems, but will use only one CPU of a multiprocessor system.  If
 218           you say Y here, the kernel will run on many, but not all,
 219           single processor systems.  On a single processor system, the kernel
 220           will run faster if you say N here.
 221
 222           See also the <file:Documentation/smp.txt> and the SMP-HOWTO
 223           available at <http://www.tldp.org/docs.html#howto>.
 224
 225           If you don't know what to do here, say N.
 226
 227 config NR_CPUS
 228         int "Maximum number of CPUs (2-1024)"
 229         range 2 1024
 230         depends on SMP
 231         default "64"
 232         help
 233           You should set this to the number of CPUs in your system, but
 234           keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
 235           only use 2 CPUs on a >2 CPU system.  Setting this to a value larger
 236           than 64 will cause the use of a CPU mask array, causing a small
 237           performance hit.
 238
 239 config HOTPLUG_CPU
 240         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 241         depends on SMP && EXPERIMENTAL
 242         select HOTPLUG
 243         default n
 244         ---help---
 245           Say Y here to experiment with turning CPUs off and on.  CPUs
 246           can be controlled through /sys/devices/system/cpu/cpu#.
 247           Say N if you want to disable CPU hotplug.
 248
 249 config SCHED_SMT
 250         bool "SMT scheduler support"
 251         depends on SMP
 252         default off
 253         help
 254           Improves the CPU scheduler's decision making when dealing with
 255           Intel IA64 chips with MultiThreading at a cost of slightly increased
 256           overhead in some places. If unsure say N here.
 257
 258 config PREEMPT
 259         bool "Preemptible Kernel"
 260         help
 261           This option reduces the latency of the kernel when reacting to
 262           real-time or interactive events by allowing a low priority process to
 263           be preempted even if it is in kernel mode executing a system call.
 264           This allows applications to run more reliably even when the system is
 265           under load.
 266
 267           Say Y here if you are building a kernel for a desktop, embedded
 268           or real-time system.  Say N if you are unsure.
 269
 270 source "mm/Kconfig"
 271
 272 config ARCH_SELECT_MEMORY_MODEL
 273         def_bool y
 274
 275 config ARCH_DISCONTIGMEM_ENABLE
 276         def_bool y
 277         help
 278           Say Y to support efficient handling of discontiguous physical memory,
 279           for architectures which are either NUMA (Non-Uniform Memory Access)
 280           or have huge holes in the physical address space for other reasons.
 281           See <file:Documentation/vm/numa> for more.
 282
 283 config ARCH_FLATMEM_ENABLE
 284         def_bool y
 285
 286 config ARCH_SPARSEMEM_ENABLE
 287         def_bool y
 288         depends on ARCH_DISCONTIGMEM_ENABLE
 289
 290 config ARCH_DISCONTIGMEM_DEFAULT
 291         def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
 292         depends on ARCH_DISCONTIGMEM_ENABLE
 293
 294 config NUMA
 295         bool "NUMA support"
 296         depends on !IA64_HP_SIM && !FLATMEM
 297         default y if IA64_SGI_SN2
 298         help
 299           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 300           Access).  This option is for configuring high-end multiprocessor
 301           server systems.  If in doubt, say N.
 302
 303 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
 304 # VIRTUAL_MEM_MAP has been retained for historical reasons.
 305 config VIRTUAL_MEM_MAP
 306         bool "Virtual mem map"
 307         depends on !SPARSEMEM
 308         default y if !IA64_HP_SIM
 309         help
 310           Say Y to compile the kernel with support for a virtual mem map.
 311           This code also only takes effect if a memory hole of greater than
 312           1 Gb is found during boot.  You must turn this option on if you
 313           require the DISCONTIGMEM option for your machine. If you are
 314           unsure, say Y.
 315
 316 config HOLES_IN_ZONE
 317         bool
 318         default y if VIRTUAL_MEM_MAP
 319
 320 config HAVE_ARCH_EARLY_PFN_TO_NID
 321         def_bool y
 322         depends on NEED_MULTIPLE_NODES
 323
 324 config IA32_SUPPORT
 325         bool "Support for Linux/x86 binaries"
 326         help
 327           IA-64 processors can execute IA-32 (X86) instructions.  By
 328           saying Y here, the kernel will include IA-32 system call
 329           emulation support which makes it possible to transparently
 330           run IA-32 Linux binaries on an IA-64 Linux system.
 331           If in doubt, say Y.
 332
 333 config COMPAT
 334         bool
 335         depends on IA32_SUPPORT
 336         default y
 337
 338 config IA64_MCA_RECOVERY
 339         tristate "MCA recovery from errors other than TLB."
 340
 341 config PERFMON
 342         bool "Performance monitor support"
 343         help
 344           Selects whether support for the IA-64 performance monitor hardware
 345           is included in the kernel.  This makes some kernel data-structures a
 346           little bigger and slows down execution a bit, but it is generally
 347           a good idea to turn this on.  If you're unsure, say Y.
 348
 349 config IA64_PALINFO
 350         tristate "/proc/pal support"
 351         help
 352           If you say Y here, you are able to get PAL (Processor Abstraction
 353           Layer) information in /proc/pal.  This contains useful information
 354           about the processors in your systems, such as cache and TLB sizes
 355           and the PAL firmware version in use.
 356
 357           To use this option, you have to ensure that the "/proc file system
 358           support" (CONFIG_PROC_FS) is enabled, too.
 359
 360 source "drivers/firmware/Kconfig"
 361
 362 source "fs/Kconfig.binfmt"
 363
 364 endmenu
 365
 366 menu "Power management and ACPI"
 367
 368 source "kernel/power/Kconfig"
 369
 370 source "drivers/acpi/Kconfig"
 371
 372 if PM
 373
 374 source "arch/ia64/kernel/cpufreq/Kconfig"
 375
 376 endif
 377
 378 endmenu
 379
 380 if !IA64_HP_SIM
 381
 382 menu "Bus options (PCI, PCMCIA)"
 383
 384 config PCI
 385         bool "PCI support"
 386         help
 387           Real IA-64 machines all have PCI/PCI-X/PCI Express busses.  Say Y
 388           here unless you are using a simulator without PCI support.
 389
 390 config PCI_DOMAINS
 391         bool
 392         default PCI
 393
 394 source "drivers/pci/Kconfig"
 395
 396 source "drivers/pci/hotplug/Kconfig"
 397
 398 source "drivers/pcmcia/Kconfig"
 399
 400 endmenu
 401
 402 endif
 403
 404 source "net/Kconfig"
 405
 406 source "drivers/Kconfig"
 407
 408 source "fs/Kconfig"
 409
 410 source "lib/Kconfig"
 411
 412 #
 413 # Use the generic interrupt handling code in kernel/irq/:
 414 #
 415 config GENERIC_HARDIRQS
 416         bool
 417         default y
 418
 419 config GENERIC_IRQ_PROBE
 420         bool
 421         default y
 422
 423 config GENERIC_PENDING_IRQ
 424         bool
 425         depends on GENERIC_HARDIRQS && SMP
 426         default y
 427
 428 source "arch/ia64/hp/sim/Kconfig"
 429
 430 menu "Instrumentation Support"
 431         depends on EXPERIMENTAL
 432
 433 source "arch/ia64/oprofile/Kconfig"
 434
 435 config KPROBES
 436         bool "Kprobes (EXPERIMENTAL)"
 437         help
 438           Kprobes allows you to trap at almost any kernel address and
 439           execute a callback function.  register_kprobe() establishes
 440           a probepoint and specifies the callback.  Kprobes is useful
 441           for kernel debugging, non-intrusive instrumentation and testing.
 442           If in doubt, say "N".
 443 endmenu
 444
 445 source "arch/ia64/Kconfig.debug"
 446
 447 source "security/Kconfig"
 448
 449 source "crypto/Kconfig"