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         select VIRTUAL_MEM_MAP
  71         select DISCONTIGMEM
  72         help
  73           This selects the system type of your hardware.  A "generic" kernel
  74           will run on any supported IA-64 system.  However, if you configure
  75           a kernel for your specific system, it will be faster and smaller.
  76
  77           generic               For any supported IA-64 system
  78           DIG-compliant         For DIG ("Developer's Interface Guide") compliant systems
  79           HP-zx1/sx1000         For HP systems
  80           HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
  81           SGI-SN2               For SGI Altix systems
  82           Ski-simulator         For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
  83
  84           If you don't know what to do, choose "generic".
  85
  86 config IA64_DIG
  87         bool "DIG-compliant"
  88
  89 config IA64_HP_ZX1
  90         bool "HP-zx1/sx1000"
  91         help
  92           Build a kernel that runs on HP zx1 and sx1000 systems.  This adds
  93           support for the HP I/O MMU.
  94
  95 config IA64_HP_ZX1_SWIOTLB
  96         bool "HP-zx1/sx1000 with software I/O TLB"
  97         help
  98           Build a kernel that runs on HP zx1 and sx1000 systems even when they
  99           have broken PCI devices which cannot DMA to full 32 bits.  Apart
 100           from support for the HP I/O MMU, this includes support for the software
 101           I/O TLB, which allows supporting the broken devices at the expense of
 102           wasting some kernel memory (about 2MB by default).
 103
 104 config IA64_SGI_SN2
 105         bool "SGI-SN2"
 106         help
 107           Selecting this option will optimize the kernel for use on sn2 based
 108           systems, but the resulting kernel binary will not run on other
 109           types of ia64 systems.  If you have an SGI Altix system, it's safe
 110           to select this option.  If in doubt, select ia64 generic support
 111           instead.
 112
 113 config IA64_HP_SIM
 114         bool "Ski-simulator"
 115
 116 endchoice
 117
 118 choice
 119         prompt "Processor type"
 120         default ITANIUM
 121
 122 config ITANIUM
 123         bool "Itanium"
 124         help
 125           Select your IA-64 processor type.  The default is Itanium.
 126           This choice is safe for all IA-64 systems, but may not perform
 127           optimally on systems with, say, Itanium 2 or newer processors.
 128
 129 config MCKINLEY
 130         bool "Itanium 2"
 131         help
 132           Select this to configure for an Itanium 2 (McKinley) processor.
 133
 134 endchoice
 135
 136 choice
 137         prompt "Kernel page size"
 138         default IA64_PAGE_SIZE_16KB
 139
 140 config IA64_PAGE_SIZE_4KB
 141         bool "4KB"
 142         help
 143           This lets you select the page size of the kernel.  For best IA-64
 144           performance, a page size of 8KB or 16KB is recommended.  For best
 145           IA-32 compatibility, a page size of 4KB should be selected (the vast
 146           majority of IA-32 binaries work perfectly fine with a larger page
 147           size).  For Itanium 2 or newer systems, a page size of 64KB can also
 148           be selected.
 149
 150           4KB                For best IA-32 compatibility
 151           8KB                For best IA-64 performance
 152           16KB               For best IA-64 performance
 153           64KB               Requires Itanium 2 or newer processor.
 154
 155           If you don't know what to do, choose 16KB.
 156
 157 config IA64_PAGE_SIZE_8KB
 158         bool "8KB"
 159
 160 config IA64_PAGE_SIZE_16KB
 161         bool "16KB"
 162
 163 config IA64_PAGE_SIZE_64KB
 164         depends on !ITANIUM
 165         bool "64KB"
 166
 167 endchoice
 168
 169 source kernel/Kconfig.hz
 170
 171 config IA64_BRL_EMU
 172         bool
 173         depends on ITANIUM
 174         default y
 175
 176 # align cache-sensitive data to 128 bytes
 177 config IA64_L1_CACHE_SHIFT
 178         int
 179         default "7" if MCKINLEY
 180         default "6" if ITANIUM
 181
 182 # align cache-sensitive data to 64 bytes
 183 config NUMA
 184         bool "NUMA support"
 185         depends on !IA64_HP_SIM
 186         default y if IA64_SGI_SN2
 187         select ACPI_NUMA
 188         help
 189           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 190           Access).  This option is for configuring high-end multiprocessor
 191           server systems.  If in doubt, say N.
 192
 193 config VIRTUAL_MEM_MAP
 194         bool "Virtual mem map"
 195         default y if !IA64_HP_SIM
 196         help
 197           Say Y to compile the kernel with support for a virtual mem map.
 198           This code also only takes effect if a memory hole of greater than
 199           1 Gb is found during boot.  You must turn this option on if you
 200           require the DISCONTIGMEM option for your machine. If you are
 201           unsure, say Y.
 202
 203 config HOLES_IN_ZONE
 204         bool
 205         default y if VIRTUAL_MEM_MAP
 206
 207 config ARCH_DISCONTIGMEM_ENABLE
 208         bool "Discontiguous memory support"
 209         depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
 210         default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
 211         help
 212           Say Y to support efficient handling of discontiguous physical memory,
 213           for architectures which are either NUMA (Non-Uniform Memory Access)
 214           or have huge holes in the physical address space for other reasons.
 215           See <file:Documentation/vm/numa> for more.
 216
 217 config IA64_CYCLONE
 218         bool "Cyclone (EXA) Time Source support"
 219         help
 220           Say Y here to enable support for IBM EXA Cyclone time source.
 221           If you're unsure, answer N.
 222
 223 config IOSAPIC
 224         bool
 225         depends on !IA64_HP_SIM
 226         default y
 227
 228 config IA64_SGI_SN_XP
 229         tristate "Support communication between SGI SSIs"
 230         select IA64_UNCACHED_ALLOCATOR
 231         help
 232           An SGI machine can be divided into multiple Single System
 233           Images which act independently of each other and have
 234           hardware based memory protection from the others.  Enabling
 235           this feature will allow for direct communication between SSIs
 236           based on a network adapter and DMA messaging.
 237
 238 config FORCE_MAX_ZONEORDER
 239         int
 240         default "18"
 241
 242 config SMP
 243         bool "Symmetric multi-processing support"
 244         help
 245           This enables support for systems with more than one CPU. If you have
 246           a system with only one CPU, say N.  If you have a system with more
 247           than one CPU, say Y.
 248
 249           If you say N here, the kernel will run on single and multiprocessor
 250           systems, but will use only one CPU of a multiprocessor system.  If
 251           you say Y here, the kernel will run on many, but not all,
 252           single processor systems.  On a single processor system, the kernel
 253           will run faster if you say N here.
 254
 255           See also the <file:Documentation/smp.txt> and the SMP-HOWTO
 256           available at <http://www.tldp.org/docs.html#howto>.
 257
 258           If you don't know what to do here, say N.
 259
 260 config NR_CPUS
 261         int "Maximum number of CPUs (2-512)"
 262         range 2 512
 263         depends on SMP
 264         default "64"
 265         help
 266           You should set this to the number of CPUs in your system, but
 267           keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
 268           only use 2 CPUs on a >2 CPU system.  Setting this to a value larger
 269           than 64 will cause the use of a CPU mask array, causing a small
 270           performance hit.
 271
 272 config HOTPLUG_CPU
 273         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 274         depends on SMP && EXPERIMENTAL
 275         select HOTPLUG
 276         default n
 277         ---help---
 278           Say Y here to experiment with turning CPUs off and on.  CPUs
 279           can be controlled through /sys/devices/system/cpu/cpu#.
 280           Say N if you want to disable CPU hotplug.
 281
 282 config SCHED_SMT
 283         bool "SMT scheduler support"
 284         depends on SMP
 285         default off
 286         help
 287           Improves the CPU scheduler's decision making when dealing with
 288           Intel IA64 chips with MultiThreading at a cost of slightly increased
 289           overhead in some places. If unsure say N here.
 290
 291 config PREEMPT
 292         bool "Preemptible Kernel"
 293         help
 294           This option reduces the latency of the kernel when reacting to
 295           real-time or interactive events by allowing a low priority process to
 296           be preempted even if it is in kernel mode executing a system call.
 297           This allows applications to run more reliably even when the system is
 298           under load.
 299
 300           Say Y here if you are building a kernel for a desktop, embedded
 301           or real-time system.  Say N if you are unsure.
 302
 303 source "mm/Kconfig"
 304
 305 config IA32_SUPPORT
 306         bool "Support for Linux/x86 binaries"
 307         help
 308           IA-64 processors can execute IA-32 (X86) instructions.  By
 309           saying Y here, the kernel will include IA-32 system call
 310           emulation support which makes it possible to transparently
 311           run IA-32 Linux binaries on an IA-64 Linux system.
 312           If in doubt, say Y.
 313
 314 config COMPAT
 315         bool
 316         depends on IA32_SUPPORT
 317         default y
 318
 319 config IA64_MCA_RECOVERY
 320         tristate "MCA recovery from errors other than TLB."
 321
 322 config PERFMON
 323         bool "Performance monitor support"
 324         help
 325           Selects whether support for the IA-64 performance monitor hardware
 326           is included in the kernel.  This makes some kernel data-structures a
 327           little bigger and slows down execution a bit, but it is generally
 328           a good idea to turn this on.  If you're unsure, say Y.
 329
 330 config IA64_PALINFO
 331         tristate "/proc/pal support"
 332         help
 333           If you say Y here, you are able to get PAL (Processor Abstraction
 334           Layer) information in /proc/pal.  This contains useful information
 335           about the processors in your systems, such as cache and TLB sizes
 336           and the PAL firmware version in use.
 337
 338           To use this option, you have to ensure that the "/proc file system
 339           support" (CONFIG_PROC_FS) is enabled, too.
 340
 341 source "drivers/firmware/Kconfig"
 342
 343 source "fs/Kconfig.binfmt"
 344
 345 endmenu
 346
 347 menu "Power management and ACPI"
 348
 349 source "kernel/power/Kconfig"
 350
 351 source "drivers/acpi/Kconfig"
 352
 353 if PM
 354
 355 source "arch/ia64/kernel/cpufreq/Kconfig"
 356
 357 endif
 358
 359 endmenu
 360
 361 if !IA64_HP_SIM
 362
 363 menu "Bus options (PCI, PCMCIA)"
 364
 365 config PCI
 366         bool "PCI support"
 367         help
 368           Real IA-64 machines all have PCI/PCI-X/PCI Express busses.  Say Y
 369           here unless you are using a simulator without PCI support.
 370
 371 config PCI_DOMAINS
 372         bool
 373         default PCI
 374
 375 source "drivers/pci/Kconfig"
 376
 377 source "drivers/pci/hotplug/Kconfig"
 378
 379 source "drivers/pcmcia/Kconfig"
 380
 381 endmenu
 382
 383 endif
 384
 385 source "net/Kconfig"
 386
 387 source "drivers/Kconfig"
 388
 389 source "fs/Kconfig"
 390
 391 source "lib/Kconfig"
 392
 393 #
 394 # Use the generic interrupt handling code in kernel/irq/:
 395 #
 396 config GENERIC_HARDIRQS
 397         bool
 398         default y
 399
 400 config GENERIC_IRQ_PROBE
 401         bool
 402         default y
 403
 404 config GENERIC_PENDING_IRQ
 405         bool
 406         depends on GENERIC_HARDIRQS && SMP
 407         default y
 408
 409 source "arch/ia64/hp/sim/Kconfig"
 410
 411 source "arch/ia64/oprofile/Kconfig"
 412
 413 source "arch/ia64/Kconfig.debug"
 414
 415 source "security/Kconfig"
 416
 417 source "crypto/Kconfig"