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