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 config ZONE_DMA_IS_DMA32
  62         bool
  63         default y
  64
  65 choice
  66         prompt "System type"
  67         default IA64_GENERIC
  68
  69 config IA64_GENERIC
  70         bool "generic"
  71         select ACPI
  72         select NUMA
  73         select ACPI_NUMA
  74         help
  75           This selects the system type of your hardware.  A "generic" kernel
  76           will run on any supported IA-64 system.  However, if you configure
  77           a kernel for your specific system, it will be faster and smaller.
  78
  79           generic               For any supported IA-64 system
  80           DIG-compliant         For DIG ("Developer's Interface Guide") compliant systems
  81           HP-zx1/sx1000         For HP systems
  82           HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
  83           SGI-SN2               For SGI Altix systems
  84           Ski-simulator         For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
  85
  86           If you don't know what to do, choose "generic".
  87
  88 config IA64_DIG
  89         bool "DIG-compliant"
  90
  91 config IA64_HP_ZX1
  92         bool "HP-zx1/sx1000"
  93         help
  94           Build a kernel that runs on HP zx1 and sx1000 systems.  This adds
  95           support for the HP I/O MMU.
  96
  97 config IA64_HP_ZX1_SWIOTLB
  98         bool "HP-zx1/sx1000 with software I/O TLB"
  99         help
 100           Build a kernel that runs on HP zx1 and sx1000 systems even when they
 101           have broken PCI devices which cannot DMA to full 32 bits.  Apart
 102           from support for the HP I/O MMU, this includes support for the software
 103           I/O TLB, which allows supporting the broken devices at the expense of
 104           wasting some kernel memory (about 2MB by default).
 105
 106 config IA64_SGI_SN2
 107         bool "SGI-SN2"
 108         help
 109           Selecting this option will optimize the kernel for use on sn2 based
 110           systems, but the resulting kernel binary will not run on other
 111           types of ia64 systems.  If you have an SGI Altix system, it's safe
 112           to select this option.  If in doubt, select ia64 generic support
 113           instead.
 114
 115 config IA64_HP_SIM
 116         bool "Ski-simulator"
 117
 118 endchoice
 119
 120 choice
 121         prompt "Processor type"
 122         default ITANIUM
 123
 124 config ITANIUM
 125         bool "Itanium"
 126         help
 127           Select your IA-64 processor type.  The default is Itanium.
 128           This choice is safe for all IA-64 systems, but may not perform
 129           optimally on systems with, say, Itanium 2 or newer processors.
 130
 131 config MCKINLEY
 132         bool "Itanium 2"
 133         help
 134           Select this to configure for an Itanium 2 (McKinley) processor.
 135
 136 endchoice
 137
 138 choice
 139         prompt "Kernel page size"
 140         default IA64_PAGE_SIZE_16KB
 141
 142 config IA64_PAGE_SIZE_4KB
 143         bool "4KB"
 144         help
 145           This lets you select the page size of the kernel.  For best IA-64
 146           performance, a page size of 8KB or 16KB is recommended.  For best
 147           IA-32 compatibility, a page size of 4KB should be selected (the vast
 148           majority of IA-32 binaries work perfectly fine with a larger page
 149           size).  For Itanium 2 or newer systems, a page size of 64KB can also
 150           be selected.
 151
 152           4KB                For best IA-32 compatibility
 153           8KB                For best IA-64 performance
 154           16KB               For best IA-64 performance
 155           64KB               Requires Itanium 2 or newer processor.
 156
 157           If you don't know what to do, choose 16KB.
 158
 159 config IA64_PAGE_SIZE_8KB
 160         bool "8KB"
 161
 162 config IA64_PAGE_SIZE_16KB
 163         bool "16KB"
 164
 165 config IA64_PAGE_SIZE_64KB
 166         depends on !ITANIUM
 167         bool "64KB"
 168
 169 endchoice
 170
 171 choice
 172         prompt "Page Table Levels"
 173         default PGTABLE_3
 174
 175 config PGTABLE_3
 176         bool "3 Levels"
 177
 178 config PGTABLE_4
 179         depends on !IA64_PAGE_SIZE_64KB
 180         bool "4 Levels"
 181
 182 endchoice
 183
 184 source kernel/Kconfig.hz
 185
 186 config IA64_BRL_EMU
 187         bool
 188         depends on ITANIUM
 189         default y
 190
 191 # align cache-sensitive data to 128 bytes
 192 config IA64_L1_CACHE_SHIFT
 193         int
 194         default "7" if MCKINLEY
 195         default "6" if ITANIUM
 196
 197 # align cache-sensitive data to 64 bytes
 198 config IA64_CYCLONE
 199         bool "Cyclone (EXA) Time Source support"
 200         help
 201           Say Y here to enable support for IBM EXA Cyclone time source.
 202           If you're unsure, answer N.
 203
 204 config IOSAPIC
 205         bool
 206         depends on !IA64_HP_SIM
 207         default y
 208
 209 config IA64_SGI_SN_XP
 210         tristate "Support communication between SGI SSIs"
 211         depends on IA64_GENERIC || IA64_SGI_SN2
 212         select IA64_UNCACHED_ALLOCATOR
 213         help
 214           An SGI machine can be divided into multiple Single System
 215           Images which act independently of each other and have
 216           hardware based memory protection from the others.  Enabling
 217           this feature will allow for direct communication between SSIs
 218           based on a network adapter and DMA messaging.
 219
 220 config FORCE_MAX_ZONEORDER
 221         int "MAX_ORDER (11 - 17)"  if !HUGETLB_PAGE
 222         range 11 17  if !HUGETLB_PAGE
 223         default "17" if HUGETLB_PAGE
 224         default "11"
 225
 226 config SMP
 227         bool "Symmetric multi-processing support"
 228         help
 229           This enables support for systems with more than one CPU. If you have
 230           a system with only one CPU, say N.  If you have a system with more
 231           than one CPU, say Y.
 232
 233           If you say N here, the kernel will run on single and multiprocessor
 234           systems, but will use only one CPU of a multiprocessor system.  If
 235           you say Y here, the kernel will run on many, but not all,
 236           single processor systems.  On a single processor system, the kernel
 237           will run faster if you say N here.
 238
 239           See also the <file:Documentation/smp.txt> and the SMP-HOWTO
 240           available at <http://www.tldp.org/docs.html#howto>.
 241
 242           If you don't know what to do here, say N.
 243
 244 config NR_CPUS
 245         int "Maximum number of CPUs (2-1024)"
 246         range 2 1024
 247         depends on SMP
 248         default "64"
 249         help
 250           You should set this to the number of CPUs in your system, but
 251           keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
 252           only use 2 CPUs on a >2 CPU system.  Setting this to a value larger
 253           than 64 will cause the use of a CPU mask array, causing a small
 254           performance hit.
 255
 256 config HOTPLUG_CPU
 257         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 258         depends on SMP && EXPERIMENTAL
 259         select HOTPLUG
 260         default n
 261         ---help---
 262           Say Y here to experiment with turning CPUs off and on.  CPUs
 263           can be controlled through /sys/devices/system/cpu/cpu#.
 264           Say N if you want to disable CPU hotplug.
 265
 266 config SCHED_SMT
 267         bool "SMT scheduler support"
 268         depends on SMP
 269         default off
 270         help
 271           Improves the CPU scheduler's decision making when dealing with
 272           Intel IA64 chips with MultiThreading at a cost of slightly increased
 273           overhead in some places. If unsure say N here.
 274
 275 config PREEMPT
 276         bool "Preemptible Kernel"
 277         help
 278           This option reduces the latency of the kernel when reacting to
 279           real-time or interactive events by allowing a low priority process to
 280           be preempted even if it is in kernel mode executing a system call.
 281           This allows applications to run more reliably even when the system is
 282           under load.
 283
 284           Say Y here if you are building a kernel for a desktop, embedded
 285           or real-time system.  Say N if you are unsure.
 286
 287 source "mm/Kconfig"
 288
 289 config ARCH_SELECT_MEMORY_MODEL
 290         def_bool y
 291
 292 config ARCH_DISCONTIGMEM_ENABLE
 293         def_bool y
 294         help
 295           Say Y to support efficient handling of discontiguous physical memory,
 296           for architectures which are either NUMA (Non-Uniform Memory Access)
 297           or have huge holes in the physical address space for other reasons.
 298           See <file:Documentation/vm/numa> for more.
 299
 300 config ARCH_FLATMEM_ENABLE
 301         def_bool y
 302
 303 config ARCH_SPARSEMEM_ENABLE
 304         def_bool y
 305         depends on ARCH_DISCONTIGMEM_ENABLE
 306
 307 config ARCH_DISCONTIGMEM_DEFAULT
 308         def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
 309         depends on ARCH_DISCONTIGMEM_ENABLE
 310
 311 config NUMA
 312         bool "NUMA support"
 313         depends on !IA64_HP_SIM && !FLATMEM
 314         default y if IA64_SGI_SN2
 315         help
 316           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 317           Access).  This option is for configuring high-end multiprocessor
 318           server systems.  If in doubt, say N.
 319
 320 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
 321 # VIRTUAL_MEM_MAP has been retained for historical reasons.
 322 config VIRTUAL_MEM_MAP
 323         bool "Virtual mem map"
 324         depends on !SPARSEMEM
 325         default y if !IA64_HP_SIM
 326         help
 327           Say Y to compile the kernel with support for a virtual mem map.
 328           This code also only takes effect if a memory hole of greater than
 329           1 Gb is found during boot.  You must turn this option on if you
 330           require the DISCONTIGMEM option for your machine. If you are
 331           unsure, say Y.
 332
 333 config HOLES_IN_ZONE
 334         bool
 335         default y if VIRTUAL_MEM_MAP
 336
 337 config HAVE_ARCH_EARLY_PFN_TO_NID
 338         def_bool y
 339         depends on NEED_MULTIPLE_NODES
 340
 341 config IA32_SUPPORT
 342         bool "Support for Linux/x86 binaries"
 343         help
 344           IA-64 processors can execute IA-32 (X86) instructions.  By
 345           saying Y here, the kernel will include IA-32 system call
 346           emulation support which makes it possible to transparently
 347           run IA-32 Linux binaries on an IA-64 Linux system.
 348           If in doubt, say Y.
 349
 350 config COMPAT
 351         bool
 352         depends on IA32_SUPPORT
 353         default y
 354
 355 config IA64_MCA_RECOVERY
 356         tristate "MCA recovery from errors other than TLB."
 357
 358 config PERFMON
 359         bool "Performance monitor support"
 360         help
 361           Selects whether support for the IA-64 performance monitor hardware
 362           is included in the kernel.  This makes some kernel data-structures a
 363           little bigger and slows down execution a bit, but it is generally
 364           a good idea to turn this on.  If you're unsure, say Y.
 365
 366 config IA64_PALINFO
 367         tristate "/proc/pal support"
 368         help
 369           If you say Y here, you are able to get PAL (Processor Abstraction
 370           Layer) information in /proc/pal.  This contains useful information
 371           about the processors in your systems, such as cache and TLB sizes
 372           and the PAL firmware version in use.
 373
 374           To use this option, you have to ensure that the "/proc file system
 375           support" (CONFIG_PROC_FS) is enabled, too.
 376
 377 source "drivers/firmware/Kconfig"
 378
 379 source "fs/Kconfig.binfmt"
 380
 381 endmenu
 382
 383 menu "Power management and ACPI"
 384
 385 source "kernel/power/Kconfig"
 386
 387 source "drivers/acpi/Kconfig"
 388
 389 if PM
 390
 391 source "arch/ia64/kernel/cpufreq/Kconfig"
 392
 393 endif
 394
 395 endmenu
 396
 397 if !IA64_HP_SIM
 398
 399 menu "Bus options (PCI, PCMCIA)"
 400
 401 config PCI
 402         bool "PCI support"
 403         help
 404           Real IA-64 machines all have PCI/PCI-X/PCI Express busses.  Say Y
 405           here unless you are using a simulator without PCI support.
 406
 407 config PCI_DOMAINS
 408         bool
 409         default PCI
 410
 411 source "drivers/pci/Kconfig"
 412
 413 source "drivers/pci/hotplug/Kconfig"
 414
 415 source "drivers/pcmcia/Kconfig"
 416
 417 endmenu
 418
 419 endif
 420
 421 source "net/Kconfig"
 422
 423 source "drivers/Kconfig"
 424
 425 source "fs/Kconfig"
 426
 427 source "lib/Kconfig"
 428
 429 #
 430 # Use the generic interrupt handling code in kernel/irq/:
 431 #
 432 config GENERIC_HARDIRQS
 433         bool
 434         default y
 435
 436 config GENERIC_IRQ_PROBE
 437         bool
 438         default y
 439
 440 config GENERIC_PENDING_IRQ
 441         bool
 442         depends on GENERIC_HARDIRQS && SMP
 443         default y
 444
 445 source "arch/ia64/hp/sim/Kconfig"
 446
 447 menu "Instrumentation Support"
 448         depends on EXPERIMENTAL
 449
 450 source "arch/ia64/oprofile/Kconfig"
 451
 452 config KPROBES
 453         bool "Kprobes (EXPERIMENTAL)"
 454         help
 455           Kprobes allows you to trap at almost any kernel address and
 456           execute a callback function.  register_kprobe() establishes
 457           a probepoint and specifies the callback.  Kprobes is useful
 458           for kernel debugging, non-intrusive instrumentation and testing.
 459           If in doubt, say "N".
 460 endmenu
 461
 462 source "arch/ia64/Kconfig.debug"
 463
 464 source "security/Kconfig"
 465
 466 source "crypto/Kconfig"