Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 1 | # x86 configuration |
Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 2 | mainmenu "Linux Kernel Configuration for x86" |
| 3 | |
| 4 | # Select 32 or 64 bit |
| 5 | config 64BIT |
Sam Ravnborg | 6840999 | 2007-11-17 15:37:31 +0100 | [diff] [blame] | 6 | bool "64-bit kernel" if ARCH = "x86" |
| 7 | default ARCH = "x86_64" |
Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 8 | help |
| 9 | Say yes to build a 64-bit kernel - formerly known as x86_64 |
| 10 | Say no to build a 32-bit kernel - formerly known as i386 |
| 11 | |
| 12 | config X86_32 |
| 13 | def_bool !64BIT |
| 14 | |
| 15 | config X86_64 |
| 16 | def_bool 64BIT |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 17 | |
| 18 | ### Arch settings |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 19 | config X86 |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 20 | def_bool y |
David Woodhouse | e17c6d5 | 2008-06-17 12:19:34 +0100 | [diff] [blame] | 21 | select HAVE_AOUT if X86_32 |
Ingo Molnar | a5574cf | 2008-05-05 23:19:50 +0200 | [diff] [blame] | 22 | select HAVE_UNSTABLE_SCHED_CLOCK |
Sam Ravnborg | ec7748b | 2008-02-09 10:46:40 +0100 | [diff] [blame] | 23 | select HAVE_IDE |
Mathieu Desnoyers | 42d4b83 | 2008-02-02 15:10:34 -0500 | [diff] [blame] | 24 | select HAVE_OPROFILE |
Rik van Riel | 28b2ee2 | 2008-07-23 21:27:05 -0700 | [diff] [blame] | 25 | select HAVE_IOREMAP_PROT |
Mathieu Desnoyers | 3f55009 | 2008-02-02 15:10:35 -0500 | [diff] [blame] | 26 | select HAVE_KPROBES |
Ingo Molnar | 1f97276 | 2008-07-26 13:52:50 +0200 | [diff] [blame] | 27 | select ARCH_WANT_OPTIONAL_GPIOLIB |
Ananth N Mavinakayanahalli | 9edddaa | 2008-03-04 14:28:37 -0800 | [diff] [blame] | 28 | select HAVE_KRETPROBES |
Steven Rostedt | e4b2b88 | 2008-08-14 15:45:11 -0400 | [diff] [blame] | 29 | select HAVE_FTRACE_MCOUNT_RECORD |
Steven Rostedt | 677aa9f | 2008-05-17 00:01:36 -0400 | [diff] [blame] | 30 | select HAVE_DYNAMIC_FTRACE |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 31 | select HAVE_FUNCTION_TRACER |
Randy Dunlap | 1a4e3f8 | 2008-02-20 09:20:08 -0800 | [diff] [blame] | 32 | select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64) |
Ingo Molnar | fcbc04c | 2008-04-21 13:39:53 +0200 | [diff] [blame] | 33 | select HAVE_ARCH_KGDB if !X86_VOYAGER |
Roland McGrath | 99bbc4b | 2008-04-20 14:35:12 -0700 | [diff] [blame] | 34 | select HAVE_ARCH_TRACEHOOK |
Dmitry Baryshkov | 323ec00 | 2008-06-29 14:19:31 +0400 | [diff] [blame] | 35 | select HAVE_GENERIC_DMA_COHERENT if X86_32 |
Johannes Berg | 58340a0 | 2008-07-25 01:45:33 -0700 | [diff] [blame] | 36 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
Balbir Singh | 7d8330a | 2008-02-10 12:46:28 +0530 | [diff] [blame] | 37 | |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 38 | config ARCH_DEFCONFIG |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 39 | string |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 40 | default "arch/x86/configs/i386_defconfig" if X86_32 |
| 41 | default "arch/x86/configs/x86_64_defconfig" if X86_64 |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 42 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 43 | config GENERIC_TIME |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 44 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 45 | |
| 46 | config GENERIC_CMOS_UPDATE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 47 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 48 | |
| 49 | config CLOCKSOURCE_WATCHDOG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 50 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 51 | |
| 52 | config GENERIC_CLOCKEVENTS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 53 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 54 | |
| 55 | config GENERIC_CLOCKEVENTS_BROADCAST |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 56 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 57 | depends on X86_64 || (X86_32 && X86_LOCAL_APIC) |
| 58 | |
| 59 | config LOCKDEP_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 60 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 61 | |
| 62 | config STACKTRACE_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 63 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 64 | |
Heiko Carstens | aa7d935 | 2008-02-01 17:45:14 +0100 | [diff] [blame] | 65 | config HAVE_LATENCYTOP_SUPPORT |
| 66 | def_bool y |
| 67 | |
Christoph Lameter | 1f84260 | 2008-01-07 23:20:30 -0800 | [diff] [blame] | 68 | config FAST_CMPXCHG_LOCAL |
| 69 | bool |
| 70 | default y |
| 71 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 72 | config MMU |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 73 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 74 | |
| 75 | config ZONE_DMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 76 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 77 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 78 | config SBUS |
| 79 | bool |
| 80 | |
| 81 | config GENERIC_ISA_DMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 82 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 83 | |
| 84 | config GENERIC_IOMAP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 85 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 86 | |
| 87 | config GENERIC_BUG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 88 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 89 | depends on BUG |
| 90 | |
| 91 | config GENERIC_HWEIGHT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 92 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 93 | |
Florian Fainelli | a608295 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 94 | config GENERIC_GPIO |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 95 | bool |
Florian Fainelli | a608295 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 96 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 97 | config ARCH_MAY_HAVE_PC_FDC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 98 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 99 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 100 | config RWSEM_GENERIC_SPINLOCK |
| 101 | def_bool !X86_XADD |
| 102 | |
| 103 | config RWSEM_XCHGADD_ALGORITHM |
| 104 | def_bool X86_XADD |
| 105 | |
Venki Pallipadi | a6869cc | 2008-02-08 17:05:44 -0800 | [diff] [blame] | 106 | config ARCH_HAS_CPU_IDLE_WAIT |
| 107 | def_bool y |
| 108 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 109 | config GENERIC_CALIBRATE_DELAY |
| 110 | def_bool y |
| 111 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 112 | config GENERIC_TIME_VSYSCALL |
| 113 | bool |
| 114 | default X86_64 |
| 115 | |
venkatesh.pallipadi@intel.com | 9a0b841 | 2008-01-31 17:35:06 -0800 | [diff] [blame] | 116 | config ARCH_HAS_CPU_RELAX |
| 117 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 118 | |
Venkatesh Pallipadi | 89cedfe | 2008-10-16 19:00:08 -0400 | [diff] [blame] | 119 | config ARCH_HAS_DEFAULT_IDLE |
| 120 | def_bool y |
| 121 | |
Pekka Enberg | 1b27d05 | 2008-04-28 02:12:22 -0700 | [diff] [blame] | 122 | config ARCH_HAS_CACHE_LINE_SIZE |
| 123 | def_bool y |
| 124 | |
Mike Travis | dd5af90 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 125 | config HAVE_SETUP_PER_CPU_AREA |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 126 | def_bool X86_64_SMP || (X86_SMP && !X86_VOYAGER) |
travis@sgi.com | b32ef63 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 127 | |
Mike Travis | 9f0e8d0 | 2008-04-04 18:11:01 -0700 | [diff] [blame] | 128 | config HAVE_CPUMASK_OF_CPU_MAP |
| 129 | def_bool X86_64_SMP |
| 130 | |
Johannes Berg | 801e406 | 2007-12-08 02:12:39 +0100 | [diff] [blame] | 131 | config ARCH_HIBERNATION_POSSIBLE |
| 132 | def_bool y |
| 133 | depends on !SMP || !X86_VOYAGER |
| 134 | |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 135 | config ARCH_SUSPEND_POSSIBLE |
| 136 | def_bool y |
| 137 | depends on !X86_VOYAGER |
| 138 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 139 | config ZONE_DMA32 |
| 140 | bool |
| 141 | default X86_64 |
| 142 | |
| 143 | config ARCH_POPULATES_NODE_MAP |
| 144 | def_bool y |
| 145 | |
| 146 | config AUDIT_ARCH |
| 147 | bool |
| 148 | default X86_64 |
| 149 | |
Ingo Molnar | 765c68b | 2008-04-09 11:03:37 +0200 | [diff] [blame] | 150 | config ARCH_SUPPORTS_OPTIMIZED_INLINING |
| 151 | def_bool y |
| 152 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 153 | # Use the generic interrupt handling code in kernel/irq/: |
| 154 | config GENERIC_HARDIRQS |
| 155 | bool |
| 156 | default y |
| 157 | |
| 158 | config GENERIC_IRQ_PROBE |
| 159 | bool |
| 160 | default y |
| 161 | |
| 162 | config GENERIC_PENDING_IRQ |
| 163 | bool |
| 164 | depends on GENERIC_HARDIRQS && SMP |
| 165 | default y |
| 166 | |
| 167 | config X86_SMP |
| 168 | bool |
Sam Ravnborg | 6b0c3d4 | 2008-01-30 13:32:27 +0100 | [diff] [blame] | 169 | depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64) |
Jens Axboe | 3b16cf8 | 2008-06-26 11:21:54 +0200 | [diff] [blame] | 170 | select USE_GENERIC_SMP_HELPERS |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 171 | default y |
| 172 | |
Sam Ravnborg | 6b0c3d4 | 2008-01-30 13:32:27 +0100 | [diff] [blame] | 173 | config X86_32_SMP |
| 174 | def_bool y |
| 175 | depends on X86_32 && SMP |
| 176 | |
| 177 | config X86_64_SMP |
| 178 | def_bool y |
| 179 | depends on X86_64 && SMP |
| 180 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 181 | config X86_HT |
| 182 | bool |
Adrian Bunk | ee0011a | 2007-12-04 17:19:07 +0100 | [diff] [blame] | 183 | depends on SMP |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 184 | depends on (X86_32 && !X86_VOYAGER) || X86_64 |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 185 | default y |
| 186 | |
| 187 | config X86_BIOS_REBOOT |
| 188 | bool |
Ingo Molnar | 31ac409 | 2008-07-10 13:31:04 +0200 | [diff] [blame] | 189 | depends on !X86_VOYAGER |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 190 | default y |
| 191 | |
| 192 | config X86_TRAMPOLINE |
| 193 | bool |
Pavel Machek | e44b7b7 | 2008-04-10 23:28:10 +0200 | [diff] [blame] | 194 | depends on X86_SMP || (X86_VOYAGER && SMP) || (64BIT && ACPI_SLEEP) |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 195 | default y |
| 196 | |
| 197 | config KTIME_SCALAR |
| 198 | def_bool X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 199 | source "init/Kconfig" |
Matt Helsley | dc52ddc | 2008-10-18 20:27:21 -0700 | [diff] [blame] | 200 | source "kernel/Kconfig.freezer" |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 201 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 202 | menu "Processor type and features" |
| 203 | |
| 204 | source "kernel/time/Kconfig" |
| 205 | |
| 206 | config SMP |
| 207 | bool "Symmetric multi-processing support" |
| 208 | ---help--- |
| 209 | This enables support for systems with more than one CPU. If you have |
| 210 | a system with only one CPU, like most personal computers, say N. If |
| 211 | you have a system with more than one CPU, say Y. |
| 212 | |
| 213 | If you say N here, the kernel will run on single and multiprocessor |
| 214 | machines, but will use only one CPU of a multiprocessor machine. If |
| 215 | you say Y here, the kernel will run on many, but not all, |
| 216 | singleprocessor machines. On a singleprocessor machine, the kernel |
| 217 | will run faster if you say N here. |
| 218 | |
| 219 | Note that if you say Y here and choose architecture "586" or |
| 220 | "Pentium" under "Processor family", the kernel will not work on 486 |
| 221 | architectures. Similarly, multiprocessor kernels for the "PPro" |
| 222 | architecture may not work on all Pentium based boards. |
| 223 | |
| 224 | People using multiprocessor machines who say Y here should also say |
| 225 | Y to "Enhanced Real Time Clock Support", below. The "Advanced Power |
| 226 | Management" code will be disabled if you say Y here. |
| 227 | |
Adrian Bunk | 03502fa | 2008-02-03 15:50:21 +0200 | [diff] [blame] | 228 | See also <file:Documentation/i386/IO-APIC.txt>, |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 229 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
| 230 | <http://www.tldp.org/docs.html#howto>. |
| 231 | |
| 232 | If you don't know what to do here, say N. |
| 233 | |
James Bottomley | b3572e3 | 2008-10-30 16:00:59 -0500 | [diff] [blame] | 234 | config X86_HAS_BOOT_CPU_ID |
| 235 | def_bool y |
| 236 | depends on X86_VOYAGER |
| 237 | |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 238 | config X86_FIND_SMP_CONFIG |
| 239 | def_bool y |
Ingo Molnar | 1b84e1c | 2008-07-10 15:55:27 +0200 | [diff] [blame] | 240 | depends on X86_MPPARSE || X86_VOYAGER |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 241 | |
| 242 | if ACPI |
| 243 | config X86_MPPARSE |
| 244 | def_bool y |
| 245 | bool "Enable MPS table" |
Ingo Molnar | 5ab7472 | 2008-07-10 14:42:03 +0200 | [diff] [blame] | 246 | depends on X86_LOCAL_APIC |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 247 | help |
| 248 | For old smp systems that do not have proper acpi support. Newer systems |
| 249 | (esp with 64bit cpus) with acpi support, MADT and DSDT will override it |
| 250 | endif |
| 251 | |
| 252 | if !ACPI |
| 253 | config X86_MPPARSE |
| 254 | def_bool y |
Ingo Molnar | 5ab7472 | 2008-07-10 14:42:03 +0200 | [diff] [blame] | 255 | depends on X86_LOCAL_APIC |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 256 | endif |
| 257 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 258 | choice |
| 259 | prompt "Subarchitecture Type" |
| 260 | default X86_PC |
| 261 | |
| 262 | config X86_PC |
| 263 | bool "PC-compatible" |
| 264 | help |
| 265 | Choose this option if your computer is a standard PC or compatible. |
| 266 | |
| 267 | config X86_ELAN |
| 268 | bool "AMD Elan" |
| 269 | depends on X86_32 |
| 270 | help |
| 271 | Select this for an AMD Elan processor. |
| 272 | |
| 273 | Do not use this option for K6/Athlon/Opteron processors! |
| 274 | |
| 275 | If unsure, choose "PC-compatible" instead. |
| 276 | |
| 277 | config X86_VOYAGER |
| 278 | bool "Voyager (NCR)" |
Ingo Molnar | 1ac9701 | 2008-05-19 14:10:14 +0200 | [diff] [blame] | 279 | depends on X86_32 && (SMP || BROKEN) && !PCI |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 280 | help |
| 281 | Voyager is an MCA-based 32-way capable SMP architecture proprietary |
| 282 | to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based. |
| 283 | |
| 284 | *** WARNING *** |
| 285 | |
| 286 | If you do not specifically know you have a Voyager based machine, |
| 287 | say N here, otherwise the kernel you build will not be bootable. |
| 288 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 289 | config X86_GENERICARCH |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 290 | bool "Generic architecture" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 291 | depends on X86_32 |
| 292 | help |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 293 | This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default |
| 294 | subarchitectures. It is intended for a generic binary kernel. |
| 295 | if you select them all, kernel will probe it one by one. and will |
| 296 | fallback to default. |
| 297 | |
| 298 | if X86_GENERICARCH |
| 299 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 300 | config X86_NUMAQ |
| 301 | bool "NUMAQ (IBM/Sequent)" |
Ingo Molnar | 3de352b | 2008-07-08 11:14:58 +0200 | [diff] [blame] | 302 | depends on SMP && X86_32 && PCI && X86_MPPARSE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 303 | select NUMA |
| 304 | help |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 305 | This option is used for getting Linux to run on a NUMAQ (IBM/Sequent) |
| 306 | NUMA multiquad box. This changes the way that processors are |
| 307 | bootstrapped, and uses Clustered Logical APIC addressing mode instead |
| 308 | of Flat Logical. You will need a new lynxer.elf file to flash your |
| 309 | firmware with - send email to <Martin.Bligh@us.ibm.com>. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 310 | |
| 311 | config X86_SUMMIT |
| 312 | bool "Summit/EXA (IBM x440)" |
| 313 | depends on X86_32 && SMP |
| 314 | help |
| 315 | This option is needed for IBM systems that use the Summit/EXA chipset. |
| 316 | In particular, it is needed for the x440. |
| 317 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 318 | config X86_ES7000 |
| 319 | bool "Support for Unisys ES7000 IA32 series" |
| 320 | depends on X86_32 && SMP |
| 321 | help |
| 322 | Support for Unisys ES7000 systems. Say 'Y' here if this kernel is |
| 323 | supposed to run on an IA32-based Unisys ES7000 system. |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 324 | |
| 325 | config X86_BIGSMP |
| 326 | bool "Support for big SMP systems with more than 8 CPUs" |
| 327 | depends on X86_32 && SMP |
| 328 | help |
| 329 | This option is needed for the systems that have more than 8 CPUs |
| 330 | and if the system is not of any sub-arch type above. |
| 331 | |
| 332 | endif |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 333 | |
| 334 | config X86_VSMP |
| 335 | bool "Support for ScaleMP vSMP" |
Glauber Costa | 96597fd | 2008-02-11 17:16:04 -0200 | [diff] [blame] | 336 | select PARAVIRT |
Ingo Molnar | a6784ad | 2008-07-10 12:21:58 +0200 | [diff] [blame] | 337 | depends on X86_64 && PCI |
Glauber Costa | 96597fd | 2008-02-11 17:16:04 -0200 | [diff] [blame] | 338 | help |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 339 | Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is |
| 340 | supposed to run on these EM64T-based machines. Only choose this option |
| 341 | if you have one of these machines. |
| 342 | |
| 343 | endchoice |
| 344 | |
Ingo Molnar | 1b84e1c | 2008-07-10 15:55:27 +0200 | [diff] [blame] | 345 | config X86_VISWS |
| 346 | bool "SGI 320/540 (Visual Workstation)" |
Ingo Molnar | 39415a4 | 2008-07-10 20:06:30 +0200 | [diff] [blame] | 347 | depends on X86_32 && PCI && !X86_VOYAGER && X86_MPPARSE && PCI_GODIRECT |
Ingo Molnar | 1b84e1c | 2008-07-10 15:55:27 +0200 | [diff] [blame] | 348 | help |
| 349 | The SGI Visual Workstation series is an IA32-based workstation |
| 350 | based on SGI systems chips with some legacy PC hardware attached. |
| 351 | |
| 352 | Say Y here to create a kernel to run on the SGI 320 or 540. |
| 353 | |
| 354 | A kernel compiled for the Visual Workstation will run on general |
| 355 | PCs as well. See <file:Documentation/sgi-visws.txt> for details. |
| 356 | |
Ingo Molnar | 1f97276 | 2008-07-26 13:52:50 +0200 | [diff] [blame] | 357 | config X86_RDC321X |
| 358 | bool "RDC R-321x SoC" |
| 359 | depends on X86_32 |
| 360 | select M486 |
| 361 | select X86_REBOOTFIXUPS |
| 362 | help |
| 363 | This option is needed for RDC R-321x system-on-chip, also known |
| 364 | as R-8610-(G). |
| 365 | If you don't have one of these chips, you should say N here. |
| 366 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 367 | config SCHED_NO_NO_OMIT_FRAME_POINTER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 368 | def_bool y |
| 369 | prompt "Single-depth WCHAN output" |
Ken Chen | a87d091 | 2008-11-06 11:10:49 -0800 | [diff] [blame^] | 370 | depends on X86 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 371 | help |
| 372 | Calculate simpler /proc/<PID>/wchan values. If this option |
| 373 | is disabled then wchan values will recurse back to the |
| 374 | caller function. This provides more accurate wchan values, |
| 375 | at the expense of slightly more scheduling overhead. |
| 376 | |
| 377 | If in doubt, say "Y". |
| 378 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 379 | menuconfig PARAVIRT_GUEST |
| 380 | bool "Paravirtualized guest support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 381 | help |
| 382 | Say Y here to get to see options related to running Linux under |
| 383 | various hypervisors. This option alone does not add any kernel code. |
| 384 | |
| 385 | If you say N, all options in this submenu will be skipped and disabled. |
| 386 | |
| 387 | if PARAVIRT_GUEST |
| 388 | |
| 389 | source "arch/x86/xen/Kconfig" |
| 390 | |
| 391 | config VMI |
| 392 | bool "VMI Guest support" |
| 393 | select PARAVIRT |
Eduardo Pereira Habkost | 42d545c | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 394 | depends on X86_32 |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 395 | depends on !X86_VOYAGER |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 396 | help |
| 397 | VMI provides a paravirtualized interface to the VMware ESX server |
| 398 | (it could be used by other hypervisors in theory too, but is not |
| 399 | at the moment), by linking the kernel to a GPL-ed ROM module |
| 400 | provided by the hypervisor. |
| 401 | |
Glauber de Oliveira Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 402 | config KVM_CLOCK |
| 403 | bool "KVM paravirtualized clock" |
| 404 | select PARAVIRT |
Gerd Hoffmann | f6e16d5 | 2008-06-03 16:17:32 +0200 | [diff] [blame] | 405 | select PARAVIRT_CLOCK |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 406 | depends on !X86_VOYAGER |
Glauber de Oliveira Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 407 | help |
| 408 | Turning on this option will allow you to run a paravirtualized clock |
| 409 | when running over the KVM hypervisor. Instead of relying on a PIT |
| 410 | (or probably other) emulation by the underlying device model, the host |
| 411 | provides the guest with timing infrastructure such as time of day, and |
| 412 | system time |
| 413 | |
Marcelo Tosatti | 0cf1bfd | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 414 | config KVM_GUEST |
| 415 | bool "KVM Guest support" |
| 416 | select PARAVIRT |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 417 | depends on !X86_VOYAGER |
Marcelo Tosatti | 0cf1bfd | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 418 | help |
| 419 | This option enables various optimizations for running under the KVM |
| 420 | hypervisor. |
| 421 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 422 | source "arch/x86/lguest/Kconfig" |
| 423 | |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 424 | config PARAVIRT |
| 425 | bool "Enable paravirtualization code" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 426 | depends on !X86_VOYAGER |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 427 | help |
| 428 | This changes the kernel so it can modify itself when it is run |
| 429 | under a hypervisor, potentially improving performance significantly |
| 430 | over full virtualization. However, when run without a hypervisor |
| 431 | the kernel is theoretically slower and slightly larger. |
| 432 | |
Gerd Hoffmann | 7af192c | 2008-06-03 16:17:29 +0200 | [diff] [blame] | 433 | config PARAVIRT_CLOCK |
| 434 | bool |
| 435 | default n |
| 436 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 437 | endif |
| 438 | |
Jeremy Fitzhardinge | 9734913 | 2008-06-25 00:19:14 -0400 | [diff] [blame] | 439 | config PARAVIRT_DEBUG |
| 440 | bool "paravirt-ops debugging" |
| 441 | depends on PARAVIRT && DEBUG_KERNEL |
| 442 | help |
| 443 | Enable to debug paravirt_ops internals. Specifically, BUG if |
| 444 | a paravirt_op is missing when it is called. |
| 445 | |
Yinghai Lu | 0327318 | 2008-04-18 17:49:15 -0700 | [diff] [blame] | 446 | config MEMTEST |
| 447 | bool "Memtest" |
Yinghai Lu | c64df70 | 2008-03-21 18:56:19 -0700 | [diff] [blame] | 448 | help |
| 449 | This option adds a kernel parameter 'memtest', which allows memtest |
Yinghai Lu | 0327318 | 2008-04-18 17:49:15 -0700 | [diff] [blame] | 450 | to be set. |
| 451 | memtest=0, mean disabled; -- default |
| 452 | memtest=1, mean do 1 test pattern; |
| 453 | ... |
| 454 | memtest=4, mean do 4 test patterns. |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 455 | If you are unsure how to answer this question, answer N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 456 | |
| 457 | config X86_SUMMIT_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 458 | def_bool y |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 459 | depends on X86_32 && NUMA && X86_GENERICARCH |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 460 | |
| 461 | config X86_CYCLONE_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 462 | def_bool y |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 463 | depends on X86_GENERICARCH |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 464 | |
| 465 | config ES7000_CLUSTERED_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 466 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 467 | depends on SMP && X86_ES7000 && MPENTIUMIII |
| 468 | |
| 469 | source "arch/x86/Kconfig.cpu" |
| 470 | |
| 471 | config HPET_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 472 | def_bool X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 473 | prompt "HPET Timer Support" if X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 474 | help |
| 475 | Use the IA-PC HPET (High Precision Event Timer) to manage |
| 476 | time in preference to the PIT and RTC, if a HPET is |
| 477 | present. |
| 478 | HPET is the next generation timer replacing legacy 8254s. |
| 479 | The HPET provides a stable time base on SMP |
| 480 | systems, unlike the TSC, but it is more expensive to access, |
| 481 | as it is off-chip. You can find the HPET spec at |
| 482 | <http://www.intel.com/hardwaredesign/hpetspec.htm>. |
| 483 | |
| 484 | You can safely choose Y here. However, HPET will only be |
| 485 | activated if the platform and the BIOS support this feature. |
| 486 | Otherwise the 8254 will be used for timing services. |
| 487 | |
| 488 | Choose N to continue using the legacy 8254 timer. |
| 489 | |
| 490 | config HPET_EMULATE_RTC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 491 | def_bool y |
Bernhard Walle | 9d8af78 | 2008-02-06 01:38:52 -0800 | [diff] [blame] | 492 | depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 493 | |
| 494 | # Mark as embedded because too many people got it wrong. |
| 495 | # The code disables itself when not needed. |
Thomas Petazzoni | 7ae9392 | 2008-04-28 02:14:14 -0700 | [diff] [blame] | 496 | config DMI |
| 497 | default y |
| 498 | bool "Enable DMI scanning" if EMBEDDED |
| 499 | help |
| 500 | Enabled scanning of DMI to identify machine quirks. Say Y |
| 501 | here unless you have verified that your setup is not |
| 502 | affected by entries in the DMI blacklist. Required by PNP |
| 503 | BIOS code. |
| 504 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 505 | config GART_IOMMU |
| 506 | bool "GART IOMMU support" if EMBEDDED |
| 507 | default y |
| 508 | select SWIOTLB |
| 509 | select AGP |
| 510 | depends on X86_64 && PCI |
| 511 | help |
| 512 | Support for full DMA access of devices with 32bit memory access only |
| 513 | on systems with more than 3GB. This is usually needed for USB, |
| 514 | sound, many IDE/SATA chipsets and some other devices. |
| 515 | Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART |
| 516 | based hardware IOMMU and a software bounce buffer based IOMMU used |
| 517 | on Intel systems and as fallback. |
| 518 | The code is only active when needed (enough memory and limited |
| 519 | device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified |
| 520 | too. |
| 521 | |
| 522 | config CALGARY_IOMMU |
| 523 | bool "IBM Calgary IOMMU support" |
| 524 | select SWIOTLB |
| 525 | depends on X86_64 && PCI && EXPERIMENTAL |
| 526 | help |
| 527 | Support for hardware IOMMUs in IBM's xSeries x366 and x460 |
| 528 | systems. Needed to run systems with more than 3GB of memory |
| 529 | properly with 32-bit PCI devices that do not support DAC |
| 530 | (Double Address Cycle). Calgary also supports bus level |
| 531 | isolation, where all DMAs pass through the IOMMU. This |
| 532 | prevents them from going anywhere except their intended |
| 533 | destination. This catches hard-to-find kernel bugs and |
| 534 | mis-behaving drivers and devices that do not use the DMA-API |
| 535 | properly to set up their DMA buffers. The IOMMU can be |
| 536 | turned off at boot time with the iommu=off parameter. |
| 537 | Normally the kernel will make the right choice by itself. |
| 538 | If unsure, say Y. |
| 539 | |
| 540 | config CALGARY_IOMMU_ENABLED_BY_DEFAULT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 541 | def_bool y |
| 542 | prompt "Should Calgary be enabled by default?" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 543 | depends on CALGARY_IOMMU |
| 544 | help |
| 545 | Should Calgary be enabled by default? if you choose 'y', Calgary |
| 546 | will be used (if it exists). If you choose 'n', Calgary will not be |
| 547 | used even if it exists. If you choose 'n' and would like to use |
| 548 | Calgary anyway, pass 'iommu=calgary' on the kernel command line. |
| 549 | If unsure, say Y. |
| 550 | |
Joerg Roedel | 2b18872 | 2008-06-26 21:27:37 +0200 | [diff] [blame] | 551 | config AMD_IOMMU |
| 552 | bool "AMD IOMMU support" |
Ingo Molnar | 07c40e8 | 2008-06-27 11:31:28 +0200 | [diff] [blame] | 553 | select SWIOTLB |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 554 | select PCI_MSI |
Ingo Molnar | 24d2ba0 | 2008-06-27 10:37:03 +0200 | [diff] [blame] | 555 | depends on X86_64 && PCI && ACPI |
Joerg Roedel | 2b18872 | 2008-06-26 21:27:37 +0200 | [diff] [blame] | 556 | help |
Joerg Roedel | 18d2220 | 2008-07-03 19:35:06 +0200 | [diff] [blame] | 557 | With this option you can enable support for AMD IOMMU hardware in |
| 558 | your system. An IOMMU is a hardware component which provides |
| 559 | remapping of DMA memory accesses from devices. With an AMD IOMMU you |
| 560 | can isolate the the DMA memory of different devices and protect the |
| 561 | system from misbehaving device drivers or hardware. |
| 562 | |
| 563 | You can find out if your system has an AMD IOMMU if you look into |
| 564 | your BIOS for an option to enable it or if you have an IVRS ACPI |
| 565 | table. |
Joerg Roedel | 2b18872 | 2008-06-26 21:27:37 +0200 | [diff] [blame] | 566 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 567 | # need this always selected by IOMMU for the VIA workaround |
| 568 | config SWIOTLB |
| 569 | bool |
| 570 | help |
| 571 | Support for software bounce buffers used on x86-64 systems |
| 572 | which don't have a hardware IOMMU (e.g. the current generation |
| 573 | of Intel's x86-64 CPUs). Using this PCI devices which can only |
| 574 | access 32-bits of memory can be used on systems with more than |
| 575 | 3 GB of memory. If unsure, say Y. |
| 576 | |
FUJITA Tomonori | a852250 | 2008-04-29 00:59:36 -0700 | [diff] [blame] | 577 | config IOMMU_HELPER |
FUJITA Tomonori | 18b743d | 2008-07-10 09:50:50 +0900 | [diff] [blame] | 578 | def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU) |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 579 | |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 580 | config MAXSMP |
| 581 | bool "Configure Maximum number of SMP Processors and NUMA Nodes" |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 582 | depends on X86_64 && SMP && BROKEN |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 583 | default n |
| 584 | help |
| 585 | Configure maximum number of CPUS and NUMA Nodes for this architecture. |
| 586 | If unsure, say N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 587 | |
| 588 | config NR_CPUS |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 589 | int "Maximum number of CPUs (2-512)" if !MAXSMP |
| 590 | range 2 512 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 591 | depends on SMP |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 592 | default "4096" if MAXSMP |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 593 | default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000 |
| 594 | default "8" |
| 595 | help |
| 596 | This allows you to specify the maximum number of CPUs which this |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 597 | kernel will support. The maximum supported value is 512 and the |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 598 | minimum value which makes sense is 2. |
| 599 | |
| 600 | This is purely to save memory - each supported CPU adds |
| 601 | approximately eight kilobytes to the kernel image. |
| 602 | |
| 603 | config SCHED_SMT |
| 604 | bool "SMT (Hyperthreading) scheduler support" |
Hiroshi Shimamoto | b089c12 | 2008-02-27 13:16:30 -0800 | [diff] [blame] | 605 | depends on X86_HT |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 606 | help |
| 607 | SMT scheduler support improves the CPU scheduler's decision making |
| 608 | when dealing with Intel Pentium 4 chips with HyperThreading at a |
| 609 | cost of slightly increased overhead in some places. If unsure say |
| 610 | N here. |
| 611 | |
| 612 | config SCHED_MC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 613 | def_bool y |
| 614 | prompt "Multi-core scheduler support" |
Hiroshi Shimamoto | b089c12 | 2008-02-27 13:16:30 -0800 | [diff] [blame] | 615 | depends on X86_HT |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 616 | help |
| 617 | Multi-core scheduler support improves the CPU scheduler's decision |
| 618 | making when dealing with multi-core CPU chips at a cost of slightly |
| 619 | increased overhead in some places. If unsure say N here. |
| 620 | |
| 621 | source "kernel/Kconfig.preempt" |
| 622 | |
| 623 | config X86_UP_APIC |
| 624 | bool "Local APIC support on uniprocessors" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 625 | depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 626 | help |
| 627 | A local APIC (Advanced Programmable Interrupt Controller) is an |
| 628 | integrated interrupt controller in the CPU. If you have a single-CPU |
| 629 | system which has a processor with a local APIC, you can say Y here to |
| 630 | enable and use it. If you say Y here even though your machine doesn't |
| 631 | have a local APIC, then the kernel will still run with no slowdown at |
| 632 | all. The local APIC supports CPU-generated self-interrupts (timer, |
| 633 | performance counters), and the NMI watchdog which detects hard |
| 634 | lockups. |
| 635 | |
| 636 | config X86_UP_IOAPIC |
| 637 | bool "IO-APIC support on uniprocessors" |
| 638 | depends on X86_UP_APIC |
| 639 | help |
| 640 | An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an |
| 641 | SMP-capable replacement for PC-style interrupt controllers. Most |
| 642 | SMP systems and many recent uniprocessor systems have one. |
| 643 | |
| 644 | If you have a single-CPU system with an IO-APIC, you can say Y here |
| 645 | to use it. If you say Y here even though your machine doesn't have |
| 646 | an IO-APIC, then the kernel will still run with no slowdown at all. |
| 647 | |
| 648 | config X86_LOCAL_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 649 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 650 | depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH)) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 651 | |
| 652 | config X86_IO_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 653 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 654 | depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH)) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 655 | |
| 656 | config X86_VISWS_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 657 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 658 | depends on X86_32 && X86_VISWS |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 659 | |
| 660 | config X86_MCE |
| 661 | bool "Machine Check Exception" |
| 662 | depends on !X86_VOYAGER |
| 663 | ---help--- |
| 664 | Machine Check Exception support allows the processor to notify the |
| 665 | kernel if it detects a problem (e.g. overheating, component failure). |
| 666 | The action the kernel takes depends on the severity of the problem, |
| 667 | ranging from a warning message on the console, to halting the machine. |
| 668 | Your processor must be a Pentium or newer to support this - check the |
| 669 | flags in /proc/cpuinfo for mce. Note that some older Pentium systems |
| 670 | have a design flaw which leads to false MCE events - hence MCE is |
| 671 | disabled on all P5 processors, unless explicitly enabled with "mce" |
| 672 | as a boot argument. Similarly, if MCE is built in and creates a |
| 673 | problem on some new non-standard machine, you can boot with "nomce" |
| 674 | to disable it. MCE support simply ignores non-MCE processors like |
| 675 | the 386 and 486, so nearly everyone can say Y here. |
| 676 | |
| 677 | config X86_MCE_INTEL |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 678 | def_bool y |
| 679 | prompt "Intel MCE features" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 680 | depends on X86_64 && X86_MCE && X86_LOCAL_APIC |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 681 | help |
| 682 | Additional support for intel specific MCE features such as |
| 683 | the thermal monitor. |
| 684 | |
| 685 | config X86_MCE_AMD |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 686 | def_bool y |
| 687 | prompt "AMD MCE features" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 688 | depends on X86_64 && X86_MCE && X86_LOCAL_APIC |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 689 | help |
| 690 | Additional support for AMD specific MCE features such as |
| 691 | the DRAM Error Threshold. |
| 692 | |
| 693 | config X86_MCE_NONFATAL |
| 694 | tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4" |
| 695 | depends on X86_32 && X86_MCE |
| 696 | help |
| 697 | Enabling this feature starts a timer that triggers every 5 seconds which |
| 698 | will look at the machine check registers to see if anything happened. |
| 699 | Non-fatal problems automatically get corrected (but still logged). |
| 700 | Disable this if you don't want to see these messages. |
| 701 | Seeing the messages this option prints out may be indicative of dying |
| 702 | or out-of-spec (ie, overclocked) hardware. |
| 703 | This option only does something on certain CPUs. |
| 704 | (AMD Athlon/Duron and Intel Pentium 4) |
| 705 | |
| 706 | config X86_MCE_P4THERMAL |
| 707 | bool "check for P4 thermal throttling interrupt." |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 708 | depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 709 | help |
| 710 | Enabling this feature will cause a message to be printed when the P4 |
| 711 | enters thermal throttling. |
| 712 | |
| 713 | config VM86 |
| 714 | bool "Enable VM86 support" if EMBEDDED |
| 715 | default y |
| 716 | depends on X86_32 |
| 717 | help |
| 718 | This option is required by programs like DOSEMU to run 16-bit legacy |
| 719 | code on X86 processors. It also may be needed by software like |
| 720 | XFree86 to initialize some video cards via BIOS. Disabling this |
| 721 | option saves about 6k. |
| 722 | |
| 723 | config TOSHIBA |
| 724 | tristate "Toshiba Laptop support" |
| 725 | depends on X86_32 |
| 726 | ---help--- |
| 727 | This adds a driver to safely access the System Management Mode of |
| 728 | the CPU on Toshiba portables with a genuine Toshiba BIOS. It does |
| 729 | not work on models with a Phoenix BIOS. The System Management Mode |
| 730 | is used to set the BIOS and power saving options on Toshiba portables. |
| 731 | |
| 732 | For information on utilities to make use of this driver see the |
| 733 | Toshiba Linux utilities web site at: |
| 734 | <http://www.buzzard.org.uk/toshiba/>. |
| 735 | |
| 736 | Say Y if you intend to run this kernel on a Toshiba portable. |
| 737 | Say N otherwise. |
| 738 | |
| 739 | config I8K |
| 740 | tristate "Dell laptop support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 741 | ---help--- |
| 742 | This adds a driver to safely access the System Management Mode |
| 743 | of the CPU on the Dell Inspiron 8000. The System Management Mode |
| 744 | is used to read cpu temperature and cooling fan status and to |
| 745 | control the fans on the I8K portables. |
| 746 | |
| 747 | This driver has been tested only on the Inspiron 8000 but it may |
| 748 | also work with other Dell laptops. You can force loading on other |
| 749 | models by passing the parameter `force=1' to the module. Use at |
| 750 | your own risk. |
| 751 | |
| 752 | For information on utilities to make use of this driver see the |
| 753 | I8K Linux utilities web site at: |
| 754 | <http://people.debian.org/~dz/i8k/> |
| 755 | |
| 756 | Say Y if you intend to run this kernel on a Dell Inspiron 8000. |
| 757 | Say N otherwise. |
| 758 | |
| 759 | config X86_REBOOTFIXUPS |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 760 | bool "Enable X86 board specific fixups for reboot" |
| 761 | depends on X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 762 | ---help--- |
| 763 | This enables chipset and/or board specific fixups to be done |
| 764 | in order to get reboot to work correctly. This is only needed on |
| 765 | some combinations of hardware and BIOS. The symptom, for which |
| 766 | this config is intended, is when reboot ends with a stalled/hung |
| 767 | system. |
| 768 | |
| 769 | Currently, the only fixup is for the Geode machines using |
Florian Fainelli | 5e3a77e | 2008-01-30 13:33:36 +0100 | [diff] [blame] | 770 | CS5530A and CS5536 chipsets and the RDC R-321x SoC. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 771 | |
| 772 | Say Y if you want to enable the fixup. Currently, it's safe to |
| 773 | enable this option even if you don't need it. |
| 774 | Say N otherwise. |
| 775 | |
| 776 | config MICROCODE |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 777 | tristate "/dev/cpu/microcode - microcode support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 778 | select FW_LOADER |
| 779 | ---help--- |
| 780 | If you say Y here, you will be able to update the microcode on |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 781 | certain Intel and AMD processors. The Intel support is for the |
| 782 | IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, |
| 783 | Pentium 4, Xeon etc. The AMD support is for family 0x10 and |
| 784 | 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra. |
| 785 | You will obviously need the actual microcode binary data itself |
| 786 | which is not shipped with the Linux kernel. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 787 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 788 | This option selects the general module only, you need to select |
| 789 | at least one vendor specific module as well. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 790 | |
| 791 | To compile this driver as a module, choose M here: the |
| 792 | module will be called microcode. |
| 793 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 794 | config MICROCODE_INTEL |
Dmitry Adamushko | 18dbc91 | 2008-09-23 12:08:44 +0200 | [diff] [blame] | 795 | bool "Intel microcode patch loading support" |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 796 | depends on MICROCODE |
| 797 | default MICROCODE |
| 798 | select FW_LOADER |
| 799 | --help--- |
| 800 | This options enables microcode patch loading support for Intel |
| 801 | processors. |
| 802 | |
| 803 | For latest news and information on obtaining all the required |
| 804 | Intel ingredients for this driver, check: |
| 805 | <http://www.urbanmyth.org/microcode/>. |
| 806 | |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 807 | config MICROCODE_AMD |
Dmitry Adamushko | 18dbc91 | 2008-09-23 12:08:44 +0200 | [diff] [blame] | 808 | bool "AMD microcode patch loading support" |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 809 | depends on MICROCODE |
| 810 | select FW_LOADER |
| 811 | --help--- |
| 812 | If you select this option, microcode patch loading support for AMD |
| 813 | processors will be enabled. |
| 814 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 815 | config MICROCODE_OLD_INTERFACE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 816 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 817 | depends on MICROCODE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 818 | |
| 819 | config X86_MSR |
| 820 | tristate "/dev/cpu/*/msr - Model-specific register support" |
| 821 | help |
| 822 | This device gives privileged processes access to the x86 |
| 823 | Model-Specific Registers (MSRs). It is a character device with |
| 824 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. |
| 825 | MSR accesses are directed to a specific CPU on multi-processor |
| 826 | systems. |
| 827 | |
| 828 | config X86_CPUID |
| 829 | tristate "/dev/cpu/*/cpuid - CPU information support" |
| 830 | help |
| 831 | This device gives processes access to the x86 CPUID instruction to |
| 832 | be executed on a specific processor. It is a character device |
| 833 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to |
| 834 | /dev/cpu/31/cpuid. |
| 835 | |
| 836 | choice |
| 837 | prompt "High Memory Support" |
| 838 | default HIGHMEM4G if !X86_NUMAQ |
| 839 | default HIGHMEM64G if X86_NUMAQ |
| 840 | depends on X86_32 |
| 841 | |
| 842 | config NOHIGHMEM |
| 843 | bool "off" |
| 844 | depends on !X86_NUMAQ |
| 845 | ---help--- |
| 846 | Linux can use up to 64 Gigabytes of physical memory on x86 systems. |
| 847 | However, the address space of 32-bit x86 processors is only 4 |
| 848 | Gigabytes large. That means that, if you have a large amount of |
| 849 | physical memory, not all of it can be "permanently mapped" by the |
| 850 | kernel. The physical memory that's not permanently mapped is called |
| 851 | "high memory". |
| 852 | |
| 853 | If you are compiling a kernel which will never run on a machine with |
| 854 | more than 1 Gigabyte total physical RAM, answer "off" here (default |
| 855 | choice and suitable for most users). This will result in a "3GB/1GB" |
| 856 | split: 3GB are mapped so that each process sees a 3GB virtual memory |
| 857 | space and the remaining part of the 4GB virtual memory space is used |
| 858 | by the kernel to permanently map as much physical memory as |
| 859 | possible. |
| 860 | |
| 861 | If the machine has between 1 and 4 Gigabytes physical RAM, then |
| 862 | answer "4GB" here. |
| 863 | |
| 864 | If more than 4 Gigabytes is used then answer "64GB" here. This |
| 865 | selection turns Intel PAE (Physical Address Extension) mode on. |
| 866 | PAE implements 3-level paging on IA32 processors. PAE is fully |
| 867 | supported by Linux, PAE mode is implemented on all recent Intel |
| 868 | processors (Pentium Pro and better). NOTE: If you say "64GB" here, |
| 869 | then the kernel will not boot on CPUs that don't support PAE! |
| 870 | |
| 871 | The actual amount of total physical memory will either be |
| 872 | auto detected or can be forced by using a kernel command line option |
| 873 | such as "mem=256M". (Try "man bootparam" or see the documentation of |
| 874 | your boot loader (lilo or loadlin) about how to pass options to the |
| 875 | kernel at boot time.) |
| 876 | |
| 877 | If unsure, say "off". |
| 878 | |
| 879 | config HIGHMEM4G |
| 880 | bool "4GB" |
| 881 | depends on !X86_NUMAQ |
| 882 | help |
| 883 | Select this if you have a 32-bit processor and between 1 and 4 |
| 884 | gigabytes of physical RAM. |
| 885 | |
| 886 | config HIGHMEM64G |
| 887 | bool "64GB" |
| 888 | depends on !M386 && !M486 |
| 889 | select X86_PAE |
| 890 | help |
| 891 | Select this if you have a 32-bit processor and more than 4 |
| 892 | gigabytes of physical RAM. |
| 893 | |
| 894 | endchoice |
| 895 | |
| 896 | choice |
| 897 | depends on EXPERIMENTAL |
| 898 | prompt "Memory split" if EMBEDDED |
| 899 | default VMSPLIT_3G |
| 900 | depends on X86_32 |
| 901 | help |
| 902 | Select the desired split between kernel and user memory. |
| 903 | |
| 904 | If the address range available to the kernel is less than the |
| 905 | physical memory installed, the remaining memory will be available |
| 906 | as "high memory". Accessing high memory is a little more costly |
| 907 | than low memory, as it needs to be mapped into the kernel first. |
| 908 | Note that increasing the kernel address space limits the range |
| 909 | available to user programs, making the address space there |
| 910 | tighter. Selecting anything other than the default 3G/1G split |
| 911 | will also likely make your kernel incompatible with binary-only |
| 912 | kernel modules. |
| 913 | |
| 914 | If you are not absolutely sure what you are doing, leave this |
| 915 | option alone! |
| 916 | |
| 917 | config VMSPLIT_3G |
| 918 | bool "3G/1G user/kernel split" |
| 919 | config VMSPLIT_3G_OPT |
| 920 | depends on !X86_PAE |
| 921 | bool "3G/1G user/kernel split (for full 1G low memory)" |
| 922 | config VMSPLIT_2G |
| 923 | bool "2G/2G user/kernel split" |
| 924 | config VMSPLIT_2G_OPT |
| 925 | depends on !X86_PAE |
| 926 | bool "2G/2G user/kernel split (for full 2G low memory)" |
| 927 | config VMSPLIT_1G |
| 928 | bool "1G/3G user/kernel split" |
| 929 | endchoice |
| 930 | |
| 931 | config PAGE_OFFSET |
| 932 | hex |
| 933 | default 0xB0000000 if VMSPLIT_3G_OPT |
| 934 | default 0x80000000 if VMSPLIT_2G |
| 935 | default 0x78000000 if VMSPLIT_2G_OPT |
| 936 | default 0x40000000 if VMSPLIT_1G |
| 937 | default 0xC0000000 |
| 938 | depends on X86_32 |
| 939 | |
| 940 | config HIGHMEM |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 941 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 942 | depends on X86_32 && (HIGHMEM64G || HIGHMEM4G) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 943 | |
| 944 | config X86_PAE |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 945 | bool "PAE (Physical Address Extension) Support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 946 | depends on X86_32 && !HIGHMEM4G |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 947 | help |
| 948 | PAE is required for NX support, and furthermore enables |
| 949 | larger swapspace support for non-overcommit purposes. It |
| 950 | has the cost of more pagetable lookup overhead, and also |
| 951 | consumes more pagetable space per process. |
| 952 | |
Jeremy Fitzhardinge | 600715d | 2008-09-11 01:31:45 -0700 | [diff] [blame] | 953 | config ARCH_PHYS_ADDR_T_64BIT |
| 954 | def_bool X86_64 || X86_PAE |
| 955 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 956 | # Common NUMA Features |
| 957 | config NUMA |
| 958 | bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" |
| 959 | depends on SMP |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 960 | depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 961 | default n if X86_PC |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 962 | default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 963 | help |
| 964 | Enable NUMA (Non Uniform Memory Access) support. |
| 965 | The kernel will try to allocate memory used by a CPU on the |
| 966 | local memory controller of the CPU and add some more |
| 967 | NUMA awareness to the kernel. |
| 968 | |
Pavel Machek | 04b6944 | 2008-08-14 17:16:50 +0200 | [diff] [blame] | 969 | For 32-bit this is currently highly experimental and should be only |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 970 | used for kernel development. It might also cause boot failures. |
Pavel Machek | 04b6944 | 2008-08-14 17:16:50 +0200 | [diff] [blame] | 971 | For 64-bit this is recommended on all multiprocessor Opteron systems. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 972 | If the system is EM64T, you should say N unless your system is |
| 973 | EM64T NUMA. |
| 974 | |
| 975 | comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" |
| 976 | depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) |
| 977 | |
| 978 | config K8_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 979 | def_bool y |
| 980 | prompt "Old style AMD Opteron NUMA detection" |
| 981 | depends on X86_64 && NUMA && PCI |
| 982 | help |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 983 | Enable K8 NUMA node topology detection. You should say Y here if |
| 984 | you have a multi processor AMD K8 system. This uses an old |
| 985 | method to read the NUMA configuration directly from the builtin |
| 986 | Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA |
| 987 | instead, which also takes priority if both are compiled in. |
| 988 | |
| 989 | config X86_64_ACPI_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 990 | def_bool y |
| 991 | prompt "ACPI NUMA detection" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 992 | depends on X86_64 && NUMA && ACPI && PCI |
| 993 | select ACPI_NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 994 | help |
| 995 | Enable ACPI SRAT based node topology detection. |
| 996 | |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 997 | # Some NUMA nodes have memory ranges that span |
| 998 | # other nodes. Even though a pfn is valid and |
| 999 | # between a node's start and end pfns, it may not |
| 1000 | # reside on that node. See memmap_init_zone() |
| 1001 | # for details. |
| 1002 | config NODES_SPAN_OTHER_NODES |
| 1003 | def_bool y |
| 1004 | depends on X86_64_ACPI_NUMA |
| 1005 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1006 | config NUMA_EMU |
| 1007 | bool "NUMA emulation" |
| 1008 | depends on X86_64 && NUMA |
| 1009 | help |
| 1010 | Enable NUMA emulation. A flat machine will be split |
| 1011 | into virtual nodes when booted with "numa=fake=N", where N is the |
| 1012 | number of nodes. This is only useful for debugging. |
| 1013 | |
| 1014 | config NODES_SHIFT |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 1015 | int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 1016 | range 1 9 if X86_64 |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 1017 | default "9" if MAXSMP |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1018 | default "6" if X86_64 |
| 1019 | default "4" if X86_NUMAQ |
| 1020 | default "3" |
| 1021 | depends on NEED_MULTIPLE_NODES |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 1022 | help |
| 1023 | Specify the maximum number of NUMA Nodes available on the target |
| 1024 | system. Increases memory reserved to accomodate various tables. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1025 | |
| 1026 | config HAVE_ARCH_BOOTMEM_NODE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1027 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1028 | depends on X86_32 && NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1029 | |
| 1030 | config ARCH_HAVE_MEMORY_PRESENT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1031 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1032 | depends on X86_32 && DISCONTIGMEM |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1033 | |
| 1034 | config NEED_NODE_MEMMAP_SIZE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1035 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1036 | depends on X86_32 && (DISCONTIGMEM || SPARSEMEM) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1037 | |
| 1038 | config HAVE_ARCH_ALLOC_REMAP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1039 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1040 | depends on X86_32 && NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1041 | |
| 1042 | config ARCH_FLATMEM_ENABLE |
| 1043 | def_bool y |
Jeff Chua | 9980996 | 2008-08-06 19:09:53 +0800 | [diff] [blame] | 1044 | depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1045 | |
| 1046 | config ARCH_DISCONTIGMEM_ENABLE |
| 1047 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1048 | depends on NUMA && X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1049 | |
| 1050 | config ARCH_DISCONTIGMEM_DEFAULT |
| 1051 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1052 | depends on NUMA && X86_32 |
| 1053 | |
| 1054 | config ARCH_SPARSEMEM_DEFAULT |
| 1055 | def_bool y |
| 1056 | depends on X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1057 | |
| 1058 | config ARCH_SPARSEMEM_ENABLE |
| 1059 | def_bool y |
Jeff Chua | 9980996 | 2008-08-06 19:09:53 +0800 | [diff] [blame] | 1060 | depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC) || X86_GENERICARCH |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1061 | select SPARSEMEM_STATIC if X86_32 |
| 1062 | select SPARSEMEM_VMEMMAP_ENABLE if X86_64 |
| 1063 | |
| 1064 | config ARCH_SELECT_MEMORY_MODEL |
| 1065 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1066 | depends on ARCH_SPARSEMEM_ENABLE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1067 | |
| 1068 | config ARCH_MEMORY_PROBE |
| 1069 | def_bool X86_64 |
| 1070 | depends on MEMORY_HOTPLUG |
| 1071 | |
| 1072 | source "mm/Kconfig" |
| 1073 | |
| 1074 | config HIGHPTE |
| 1075 | bool "Allocate 3rd-level pagetables from highmem" |
| 1076 | depends on X86_32 && (HIGHMEM4G || HIGHMEM64G) |
| 1077 | help |
| 1078 | The VM uses one page table entry for each page of physical memory. |
| 1079 | For systems with a lot of RAM, this can be wasteful of precious |
| 1080 | low memory. Setting this option will put user-space page table |
| 1081 | entries in high memory. |
| 1082 | |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1083 | config X86_CHECK_BIOS_CORRUPTION |
| 1084 | bool "Check for low memory corruption" |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1085 | help |
| 1086 | Periodically check for memory corruption in low memory, which |
| 1087 | is suspected to be caused by BIOS. Even when enabled in the |
| 1088 | configuration, it is disabled at runtime. Enable it by |
| 1089 | setting "memory_corruption_check=1" on the kernel command |
| 1090 | line. By default it scans the low 64k of memory every 60 |
| 1091 | seconds; see the memory_corruption_check_size and |
| 1092 | memory_corruption_check_period parameters in |
| 1093 | Documentation/kernel-parameters.txt to adjust this. |
| 1094 | |
| 1095 | When enabled with the default parameters, this option has |
| 1096 | almost no overhead, as it reserves a relatively small amount |
| 1097 | of memory and scans it infrequently. It both detects corruption |
| 1098 | and prevents it from affecting the running system. |
| 1099 | |
| 1100 | It is, however, intended as a diagnostic tool; if repeatable |
| 1101 | BIOS-originated corruption always affects the same memory, |
| 1102 | you can use memmap= to prevent the kernel from using that |
| 1103 | memory. |
| 1104 | |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1105 | config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK |
| 1106 | bool "Set the default setting of memory_corruption_check" |
| 1107 | depends on X86_CHECK_BIOS_CORRUPTION |
| 1108 | default y |
| 1109 | help |
| 1110 | Set whether the default state of memory_corruption_check is |
| 1111 | on or off. |
| 1112 | |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1113 | config X86_RESERVE_LOW_64K |
| 1114 | bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen" |
| 1115 | default y |
| 1116 | help |
| 1117 | Reserve the first 64K of physical RAM on BIOSes that are known |
| 1118 | to potentially corrupt that memory range. A numbers of BIOSes are |
| 1119 | known to utilize this area during suspend/resume, so it must not |
| 1120 | be used by the kernel. |
| 1121 | |
| 1122 | Set this to N if you are absolutely sure that you trust the BIOS |
| 1123 | to get all its memory reservations and usages right. |
| 1124 | |
| 1125 | If you have doubts about the BIOS (e.g. suspend/resume does not |
| 1126 | work or there's kernel crashes after certain hardware hotplug |
| 1127 | events) and it's not AMI or Phoenix, then you might want to enable |
| 1128 | X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical |
| 1129 | corruption patterns. |
| 1130 | |
| 1131 | Say Y if unsure. |
| 1132 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1133 | config MATH_EMULATION |
| 1134 | bool |
| 1135 | prompt "Math emulation" if X86_32 |
| 1136 | ---help--- |
| 1137 | Linux can emulate a math coprocessor (used for floating point |
| 1138 | operations) if you don't have one. 486DX and Pentium processors have |
| 1139 | a math coprocessor built in, 486SX and 386 do not, unless you added |
| 1140 | a 487DX or 387, respectively. (The messages during boot time can |
| 1141 | give you some hints here ["man dmesg"].) Everyone needs either a |
| 1142 | coprocessor or this emulation. |
| 1143 | |
| 1144 | If you don't have a math coprocessor, you need to say Y here; if you |
| 1145 | say Y here even though you have a coprocessor, the coprocessor will |
| 1146 | be used nevertheless. (This behavior can be changed with the kernel |
| 1147 | command line option "no387", which comes handy if your coprocessor |
| 1148 | is broken. Try "man bootparam" or see the documentation of your boot |
| 1149 | loader (lilo or loadlin) about how to pass options to the kernel at |
| 1150 | boot time.) This means that it is a good idea to say Y here if you |
| 1151 | intend to use this kernel on different machines. |
| 1152 | |
| 1153 | More information about the internals of the Linux math coprocessor |
| 1154 | emulation can be found in <file:arch/x86/math-emu/README>. |
| 1155 | |
| 1156 | If you are not sure, say Y; apart from resulting in a 66 KB bigger |
| 1157 | kernel, it won't hurt. |
| 1158 | |
| 1159 | config MTRR |
| 1160 | bool "MTRR (Memory Type Range Register) support" |
| 1161 | ---help--- |
| 1162 | On Intel P6 family processors (Pentium Pro, Pentium II and later) |
| 1163 | the Memory Type Range Registers (MTRRs) may be used to control |
| 1164 | processor access to memory ranges. This is most useful if you have |
| 1165 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining |
| 1166 | allows bus write transfers to be combined into a larger transfer |
| 1167 | before bursting over the PCI/AGP bus. This can increase performance |
| 1168 | of image write operations 2.5 times or more. Saying Y here creates a |
| 1169 | /proc/mtrr file which may be used to manipulate your processor's |
| 1170 | MTRRs. Typically the X server should use this. |
| 1171 | |
| 1172 | This code has a reasonably generic interface so that similar |
| 1173 | control registers on other processors can be easily supported |
| 1174 | as well: |
| 1175 | |
| 1176 | The Cyrix 6x86, 6x86MX and M II processors have Address Range |
| 1177 | Registers (ARRs) which provide a similar functionality to MTRRs. For |
| 1178 | these, the ARRs are used to emulate the MTRRs. |
| 1179 | The AMD K6-2 (stepping 8 and above) and K6-3 processors have two |
| 1180 | MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing |
| 1181 | write-combining. All of these processors are supported by this code |
| 1182 | and it makes sense to say Y here if you have one of them. |
| 1183 | |
| 1184 | Saying Y here also fixes a problem with buggy SMP BIOSes which only |
| 1185 | set the MTRRs for the boot CPU and not for the secondary CPUs. This |
| 1186 | can lead to all sorts of problems, so it's good to say Y here. |
| 1187 | |
| 1188 | You can safely say Y even if your machine doesn't have MTRRs, you'll |
| 1189 | just add about 9 KB to your kernel. |
| 1190 | |
Randy Dunlap | 7225e75 | 2008-07-26 17:54:22 -0700 | [diff] [blame] | 1191 | See <file:Documentation/x86/mtrr.txt> for more information. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1192 | |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1193 | config MTRR_SANITIZER |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1194 | def_bool y |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1195 | prompt "MTRR cleanup support" |
| 1196 | depends on MTRR |
| 1197 | help |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1198 | Convert MTRR layout from continuous to discrete, so X drivers can |
| 1199 | add writeback entries. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1200 | |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1201 | Can be disabled with disable_mtrr_cleanup on the kernel command line. |
| 1202 | The largest mtrr entry size for a continous block can be set with |
| 1203 | mtrr_chunk_size. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1204 | |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1205 | If unsure, say Y. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1206 | |
| 1207 | config MTRR_SANITIZER_ENABLE_DEFAULT |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1208 | int "MTRR cleanup enable value (0-1)" |
| 1209 | range 0 1 |
| 1210 | default "0" |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1211 | depends on MTRR_SANITIZER |
| 1212 | help |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1213 | Enable mtrr cleanup default value |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1214 | |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1215 | config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT |
| 1216 | int "MTRR cleanup spare reg num (0-7)" |
| 1217 | range 0 7 |
| 1218 | default "1" |
| 1219 | depends on MTRR_SANITIZER |
| 1220 | help |
| 1221 | mtrr cleanup spare entries default, it can be changed via |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1222 | mtrr_spare_reg_nr=N on the kernel command line. |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1223 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1224 | config X86_PAT |
Ingo Molnar | 2a8a271 | 2008-04-26 10:26:52 +0200 | [diff] [blame] | 1225 | bool |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1226 | prompt "x86 PAT support" |
Ingo Molnar | 2a8a271 | 2008-04-26 10:26:52 +0200 | [diff] [blame] | 1227 | depends on MTRR |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1228 | help |
| 1229 | Use PAT attributes to setup page level cache control. |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1230 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1231 | PATs are the modern equivalents of MTRRs and are much more |
| 1232 | flexible than MTRRs. |
| 1233 | |
| 1234 | Say N here if you see bootup problems (boot crash, boot hang, |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1235 | spontaneous reboots) or a non-working video driver. |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1236 | |
| 1237 | If unsure, say Y. |
| 1238 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1239 | config EFI |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1240 | bool "EFI runtime service support" |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 1241 | depends on ACPI |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1242 | ---help--- |
Huang, Ying | 8b2cb7a | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 1243 | This enables the kernel to use EFI runtime services that are |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1244 | available (such as the EFI variable services). |
| 1245 | |
Huang, Ying | 8b2cb7a | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 1246 | This option is only useful on systems that have EFI firmware. |
| 1247 | In addition, you should use the latest ELILO loader available |
| 1248 | at <http://elilo.sourceforge.net> in order to take advantage |
| 1249 | of EFI runtime services. However, even with this option, the |
| 1250 | resultant kernel should continue to boot on existing non-EFI |
| 1251 | platforms. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1252 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1253 | config SECCOMP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1254 | def_bool y |
| 1255 | prompt "Enable seccomp to safely compute untrusted bytecode" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1256 | help |
| 1257 | This kernel feature is useful for number crunching applications |
| 1258 | that may need to compute untrusted bytecode during their |
| 1259 | execution. By using pipes or other transports made available to |
| 1260 | the process as file descriptors supporting the read/write |
| 1261 | syscalls, it's possible to isolate those applications in |
| 1262 | their own address space using seccomp. Once seccomp is |
Alexey Dobriyan | 9c0bbee | 2008-09-09 11:01:31 +0400 | [diff] [blame] | 1263 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1264 | and the task is only allowed to execute a few safe syscalls |
| 1265 | defined by each seccomp mode. |
| 1266 | |
| 1267 | If unsure, say Y. Only embedded should say N here. |
| 1268 | |
| 1269 | config CC_STACKPROTECTOR |
| 1270 | bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" |
Linus Torvalds | 2c020a9 | 2008-02-22 08:21:38 -0800 | [diff] [blame] | 1271 | depends on X86_64 && EXPERIMENTAL && BROKEN |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1272 | help |
| 1273 | This option turns on the -fstack-protector GCC feature. This |
| 1274 | feature puts, at the beginning of critical functions, a canary |
| 1275 | value on the stack just before the return address, and validates |
| 1276 | the value just before actually returning. Stack based buffer |
| 1277 | overflows (that need to overwrite this return address) now also |
| 1278 | overwrite the canary, which gets detected and the attack is then |
| 1279 | neutralized via a kernel panic. |
| 1280 | |
| 1281 | This feature requires gcc version 4.2 or above, or a distribution |
| 1282 | gcc with the feature backported. Older versions are automatically |
| 1283 | detected and for those versions, this configuration option is ignored. |
| 1284 | |
| 1285 | config CC_STACKPROTECTOR_ALL |
| 1286 | bool "Use stack-protector for all functions" |
| 1287 | depends on CC_STACKPROTECTOR |
| 1288 | help |
| 1289 | Normally, GCC only inserts the canary value protection for |
| 1290 | functions that use large-ish on-stack buffers. By enabling |
| 1291 | this option, GCC will be asked to do this for ALL functions. |
| 1292 | |
| 1293 | source kernel/Kconfig.hz |
| 1294 | |
| 1295 | config KEXEC |
| 1296 | bool "kexec system call" |
Ingo Molnar | 3e8f7e3 | 2008-04-28 10:46:58 +0200 | [diff] [blame] | 1297 | depends on X86_BIOS_REBOOT |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1298 | help |
| 1299 | kexec is a system call that implements the ability to shutdown your |
| 1300 | current kernel, and to start another kernel. It is like a reboot |
| 1301 | but it is independent of the system firmware. And like a reboot |
| 1302 | you can start any kernel with it, not just Linux. |
| 1303 | |
| 1304 | The name comes from the similarity to the exec system call. |
| 1305 | |
| 1306 | It is an ongoing process to be certain the hardware in a machine |
| 1307 | is properly shutdown, so do not be surprised if this code does not |
| 1308 | initially work for you. It may help to enable device hotplugging |
| 1309 | support. As of this writing the exact hardware interface is |
| 1310 | strongly in flux, so no good recommendation can be made. |
| 1311 | |
| 1312 | config CRASH_DUMP |
Pavel Machek | 04b6944 | 2008-08-14 17:16:50 +0200 | [diff] [blame] | 1313 | bool "kernel crash dumps" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1314 | depends on X86_64 || (X86_32 && HIGHMEM) |
| 1315 | help |
| 1316 | Generate crash dump after being started by kexec. |
| 1317 | This should be normally only set in special crash dump kernels |
| 1318 | which are loaded in the main kernel with kexec-tools into |
| 1319 | a specially reserved region and then later executed after |
| 1320 | a crash by kdump/kexec. The crash dump kernel must be compiled |
| 1321 | to a memory address not used by the main kernel or BIOS using |
| 1322 | PHYSICAL_START, or it must be built as a relocatable image |
| 1323 | (CONFIG_RELOCATABLE=y). |
| 1324 | For more details see Documentation/kdump/kdump.txt |
| 1325 | |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1326 | config KEXEC_JUMP |
| 1327 | bool "kexec jump (EXPERIMENTAL)" |
| 1328 | depends on EXPERIMENTAL |
Huang Ying | 89081d1 | 2008-07-25 19:45:10 -0700 | [diff] [blame] | 1329 | depends on KEXEC && HIBERNATION && X86_32 |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1330 | help |
Huang Ying | 89081d1 | 2008-07-25 19:45:10 -0700 | [diff] [blame] | 1331 | Jump between original kernel and kexeced kernel and invoke |
| 1332 | code in physical address mode via KEXEC |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1333 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1334 | config PHYSICAL_START |
| 1335 | hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) |
| 1336 | default "0x1000000" if X86_NUMAQ |
| 1337 | default "0x200000" if X86_64 |
| 1338 | default "0x100000" |
| 1339 | help |
| 1340 | This gives the physical address where the kernel is loaded. |
| 1341 | |
| 1342 | If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then |
| 1343 | bzImage will decompress itself to above physical address and |
| 1344 | run from there. Otherwise, bzImage will run from the address where |
| 1345 | it has been loaded by the boot loader and will ignore above physical |
| 1346 | address. |
| 1347 | |
| 1348 | In normal kdump cases one does not have to set/change this option |
| 1349 | as now bzImage can be compiled as a completely relocatable image |
| 1350 | (CONFIG_RELOCATABLE=y) and be used to load and run from a different |
| 1351 | address. This option is mainly useful for the folks who don't want |
| 1352 | to use a bzImage for capturing the crash dump and want to use a |
| 1353 | vmlinux instead. vmlinux is not relocatable hence a kernel needs |
| 1354 | to be specifically compiled to run from a specific memory area |
| 1355 | (normally a reserved region) and this option comes handy. |
| 1356 | |
| 1357 | So if you are using bzImage for capturing the crash dump, leave |
| 1358 | the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y. |
| 1359 | Otherwise if you plan to use vmlinux for capturing the crash dump |
| 1360 | change this value to start of the reserved region (Typically 16MB |
| 1361 | 0x1000000). In other words, it can be set based on the "X" value as |
| 1362 | specified in the "crashkernel=YM@XM" command line boot parameter |
| 1363 | passed to the panic-ed kernel. Typically this parameter is set as |
| 1364 | crashkernel=64M@16M. Please take a look at |
| 1365 | Documentation/kdump/kdump.txt for more details about crash dumps. |
| 1366 | |
| 1367 | Usage of bzImage for capturing the crash dump is recommended as |
| 1368 | one does not have to build two kernels. Same kernel can be used |
| 1369 | as production kernel and capture kernel. Above option should have |
| 1370 | gone away after relocatable bzImage support is introduced. But it |
| 1371 | is present because there are users out there who continue to use |
| 1372 | vmlinux for dump capture. This option should go away down the |
| 1373 | line. |
| 1374 | |
| 1375 | Don't change this unless you know what you are doing. |
| 1376 | |
| 1377 | config RELOCATABLE |
| 1378 | bool "Build a relocatable kernel (EXPERIMENTAL)" |
| 1379 | depends on EXPERIMENTAL |
| 1380 | help |
| 1381 | This builds a kernel image that retains relocation information |
| 1382 | so it can be loaded someplace besides the default 1MB. |
| 1383 | The relocations tend to make the kernel binary about 10% larger, |
| 1384 | but are discarded at runtime. |
| 1385 | |
| 1386 | One use is for the kexec on panic case where the recovery kernel |
| 1387 | must live at a different physical address than the primary |
| 1388 | kernel. |
| 1389 | |
| 1390 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 1391 | it has been loaded at and the compile time physical address |
| 1392 | (CONFIG_PHYSICAL_START) is ignored. |
| 1393 | |
| 1394 | config PHYSICAL_ALIGN |
| 1395 | hex |
| 1396 | prompt "Alignment value to which kernel should be aligned" if X86_32 |
| 1397 | default "0x100000" if X86_32 |
| 1398 | default "0x200000" if X86_64 |
| 1399 | range 0x2000 0x400000 |
| 1400 | help |
| 1401 | This value puts the alignment restrictions on physical address |
| 1402 | where kernel is loaded and run from. Kernel is compiled for an |
| 1403 | address which meets above alignment restriction. |
| 1404 | |
| 1405 | If bootloader loads the kernel at a non-aligned address and |
| 1406 | CONFIG_RELOCATABLE is set, kernel will move itself to nearest |
| 1407 | address aligned to above value and run from there. |
| 1408 | |
| 1409 | If bootloader loads the kernel at a non-aligned address and |
| 1410 | CONFIG_RELOCATABLE is not set, kernel will ignore the run time |
| 1411 | load address and decompress itself to the address it has been |
| 1412 | compiled for and run from there. The address for which kernel is |
| 1413 | compiled already meets above alignment restrictions. Hence the |
| 1414 | end result is that kernel runs from a physical address meeting |
| 1415 | above alignment restrictions. |
| 1416 | |
| 1417 | Don't change this unless you know what you are doing. |
| 1418 | |
| 1419 | config HOTPLUG_CPU |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1420 | bool "Support for hot-pluggable CPUs" |
| 1421 | depends on SMP && HOTPLUG && !X86_VOYAGER |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1422 | ---help--- |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1423 | Say Y here to allow turning CPUs off and on. CPUs can be |
| 1424 | controlled through /sys/devices/system/cpu. |
| 1425 | ( Note: power management support will enable this option |
| 1426 | automatically on SMP systems. ) |
| 1427 | Say N if you want to disable CPU hotplug. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1428 | |
| 1429 | config COMPAT_VDSO |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1430 | def_bool y |
| 1431 | prompt "Compat VDSO support" |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 1432 | depends on X86_32 || IA32_EMULATION |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1433 | help |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 1434 | Map the 32-bit VDSO to the predictable old-style address too. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1435 | ---help--- |
| 1436 | Say N here if you are running a sufficiently recent glibc |
| 1437 | version (2.3.3 or later), to remove the high-mapped |
| 1438 | VDSO mapping and to exclusively use the randomized VDSO. |
| 1439 | |
| 1440 | If unsure, say Y. |
| 1441 | |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 1442 | config CMDLINE_BOOL |
| 1443 | bool "Built-in kernel command line" |
| 1444 | default n |
| 1445 | help |
| 1446 | Allow for specifying boot arguments to the kernel at |
| 1447 | build time. On some systems (e.g. embedded ones), it is |
| 1448 | necessary or convenient to provide some or all of the |
| 1449 | kernel boot arguments with the kernel itself (that is, |
| 1450 | to not rely on the boot loader to provide them.) |
| 1451 | |
| 1452 | To compile command line arguments into the kernel, |
| 1453 | set this option to 'Y', then fill in the |
| 1454 | the boot arguments in CONFIG_CMDLINE. |
| 1455 | |
| 1456 | Systems with fully functional boot loaders (i.e. non-embedded) |
| 1457 | should leave this option set to 'N'. |
| 1458 | |
| 1459 | config CMDLINE |
| 1460 | string "Built-in kernel command string" |
| 1461 | depends on CMDLINE_BOOL |
| 1462 | default "" |
| 1463 | help |
| 1464 | Enter arguments here that should be compiled into the kernel |
| 1465 | image and used at boot time. If the boot loader provides a |
| 1466 | command line at boot time, it is appended to this string to |
| 1467 | form the full kernel command line, when the system boots. |
| 1468 | |
| 1469 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to |
| 1470 | change this behavior. |
| 1471 | |
| 1472 | In most cases, the command line (whether built-in or provided |
| 1473 | by the boot loader) should specify the device for the root |
| 1474 | file system. |
| 1475 | |
| 1476 | config CMDLINE_OVERRIDE |
| 1477 | bool "Built-in command line overrides boot loader arguments" |
| 1478 | default n |
| 1479 | depends on CMDLINE_BOOL |
| 1480 | help |
| 1481 | Set this option to 'Y' to have the kernel ignore the boot loader |
| 1482 | command line, and use ONLY the built-in command line. |
| 1483 | |
| 1484 | This is used to work around broken boot loaders. This should |
| 1485 | be set to 'N' under normal conditions. |
| 1486 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1487 | endmenu |
| 1488 | |
| 1489 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 1490 | def_bool y |
| 1491 | depends on X86_64 || (X86_32 && HIGHMEM) |
| 1492 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1493 | config HAVE_ARCH_EARLY_PFN_TO_NID |
| 1494 | def_bool X86_64 |
| 1495 | depends on NUMA |
| 1496 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1497 | menu "Power management options" |
| 1498 | depends on !X86_VOYAGER |
| 1499 | |
| 1500 | config ARCH_HIBERNATION_HEADER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1501 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1502 | depends on X86_64 && HIBERNATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1503 | |
| 1504 | source "kernel/power/Kconfig" |
| 1505 | |
| 1506 | source "drivers/acpi/Kconfig" |
| 1507 | |
Andi Kleen | a6b6807 | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 1508 | config X86_APM_BOOT |
| 1509 | bool |
| 1510 | default y |
| 1511 | depends on APM || APM_MODULE |
| 1512 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1513 | menuconfig APM |
| 1514 | tristate "APM (Advanced Power Management) BIOS support" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1515 | depends on X86_32 && PM_SLEEP |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1516 | ---help--- |
| 1517 | APM is a BIOS specification for saving power using several different |
| 1518 | techniques. This is mostly useful for battery powered laptops with |
| 1519 | APM compliant BIOSes. If you say Y here, the system time will be |
| 1520 | reset after a RESUME operation, the /proc/apm device will provide |
| 1521 | battery status information, and user-space programs will receive |
| 1522 | notification of APM "events" (e.g. battery status change). |
| 1523 | |
| 1524 | If you select "Y" here, you can disable actual use of the APM |
| 1525 | BIOS by passing the "apm=off" option to the kernel at boot time. |
| 1526 | |
| 1527 | Note that the APM support is almost completely disabled for |
| 1528 | machines with more than one CPU. |
| 1529 | |
| 1530 | In order to use APM, you will need supporting software. For location |
Randy Dunlap | 5347112 | 2008-03-12 18:10:51 -0400 | [diff] [blame] | 1531 | and more information, read <file:Documentation/power/pm.txt> and the |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1532 | Battery Powered Linux mini-HOWTO, available from |
| 1533 | <http://www.tldp.org/docs.html#howto>. |
| 1534 | |
| 1535 | This driver does not spin down disk drives (see the hdparm(8) |
| 1536 | manpage ("man 8 hdparm") for that), and it doesn't turn off |
| 1537 | VESA-compliant "green" monitors. |
| 1538 | |
| 1539 | This driver does not support the TI 4000M TravelMate and the ACER |
| 1540 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" |
| 1541 | desktop machines also don't have compliant BIOSes, and this driver |
| 1542 | may cause those machines to panic during the boot phase. |
| 1543 | |
| 1544 | Generally, if you don't have a battery in your machine, there isn't |
| 1545 | much point in using this driver and you should say N. If you get |
| 1546 | random kernel OOPSes or reboots that don't seem to be related to |
| 1547 | anything, try disabling/enabling this option (or disabling/enabling |
| 1548 | APM in your BIOS). |
| 1549 | |
| 1550 | Some other things you should try when experiencing seemingly random, |
| 1551 | "weird" problems: |
| 1552 | |
| 1553 | 1) make sure that you have enough swap space and that it is |
| 1554 | enabled. |
| 1555 | 2) pass the "no-hlt" option to the kernel |
| 1556 | 3) switch on floating point emulation in the kernel and pass |
| 1557 | the "no387" option to the kernel |
| 1558 | 4) pass the "floppy=nodma" option to the kernel |
| 1559 | 5) pass the "mem=4M" option to the kernel (thereby disabling |
| 1560 | all but the first 4 MB of RAM) |
| 1561 | 6) make sure that the CPU is not over clocked. |
| 1562 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> |
| 1563 | 8) disable the cache from your BIOS settings |
| 1564 | 9) install a fan for the video card or exchange video RAM |
| 1565 | 10) install a better fan for the CPU |
| 1566 | 11) exchange RAM chips |
| 1567 | 12) exchange the motherboard. |
| 1568 | |
| 1569 | To compile this driver as a module, choose M here: the |
| 1570 | module will be called apm. |
| 1571 | |
| 1572 | if APM |
| 1573 | |
| 1574 | config APM_IGNORE_USER_SUSPEND |
| 1575 | bool "Ignore USER SUSPEND" |
| 1576 | help |
| 1577 | This option will ignore USER SUSPEND requests. On machines with a |
| 1578 | compliant APM BIOS, you want to say N. However, on the NEC Versa M |
| 1579 | series notebooks, it is necessary to say Y because of a BIOS bug. |
| 1580 | |
| 1581 | config APM_DO_ENABLE |
| 1582 | bool "Enable PM at boot time" |
| 1583 | ---help--- |
| 1584 | Enable APM features at boot time. From page 36 of the APM BIOS |
| 1585 | specification: "When disabled, the APM BIOS does not automatically |
| 1586 | power manage devices, enter the Standby State, enter the Suspend |
| 1587 | State, or take power saving steps in response to CPU Idle calls." |
| 1588 | This driver will make CPU Idle calls when Linux is idle (unless this |
| 1589 | feature is turned off -- see "Do CPU IDLE calls", below). This |
| 1590 | should always save battery power, but more complicated APM features |
| 1591 | will be dependent on your BIOS implementation. You may need to turn |
| 1592 | this option off if your computer hangs at boot time when using APM |
| 1593 | support, or if it beeps continuously instead of suspending. Turn |
| 1594 | this off if you have a NEC UltraLite Versa 33/C or a Toshiba |
| 1595 | T400CDT. This is off by default since most machines do fine without |
| 1596 | this feature. |
| 1597 | |
| 1598 | config APM_CPU_IDLE |
| 1599 | bool "Make CPU Idle calls when idle" |
| 1600 | help |
| 1601 | Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. |
| 1602 | On some machines, this can activate improved power savings, such as |
| 1603 | a slowed CPU clock rate, when the machine is idle. These idle calls |
| 1604 | are made after the idle loop has run for some length of time (e.g., |
| 1605 | 333 mS). On some machines, this will cause a hang at boot time or |
| 1606 | whenever the CPU becomes idle. (On machines with more than one CPU, |
| 1607 | this option does nothing.) |
| 1608 | |
| 1609 | config APM_DISPLAY_BLANK |
| 1610 | bool "Enable console blanking using APM" |
| 1611 | help |
| 1612 | Enable console blanking using the APM. Some laptops can use this to |
| 1613 | turn off the LCD backlight when the screen blanker of the Linux |
| 1614 | virtual console blanks the screen. Note that this is only used by |
| 1615 | the virtual console screen blanker, and won't turn off the backlight |
| 1616 | when using the X Window system. This also doesn't have anything to |
| 1617 | do with your VESA-compliant power-saving monitor. Further, this |
| 1618 | option doesn't work for all laptops -- it might not turn off your |
| 1619 | backlight at all, or it might print a lot of errors to the console, |
| 1620 | especially if you are using gpm. |
| 1621 | |
| 1622 | config APM_ALLOW_INTS |
| 1623 | bool "Allow interrupts during APM BIOS calls" |
| 1624 | help |
| 1625 | Normally we disable external interrupts while we are making calls to |
| 1626 | the APM BIOS as a measure to lessen the effects of a badly behaving |
| 1627 | BIOS implementation. The BIOS should reenable interrupts if it |
| 1628 | needs to. Unfortunately, some BIOSes do not -- especially those in |
| 1629 | many of the newer IBM Thinkpads. If you experience hangs when you |
| 1630 | suspend, try setting this to Y. Otherwise, say N. |
| 1631 | |
| 1632 | config APM_REAL_MODE_POWER_OFF |
| 1633 | bool "Use real mode APM BIOS call to power off" |
| 1634 | help |
| 1635 | Use real mode APM BIOS calls to switch off the computer. This is |
| 1636 | a work-around for a number of buggy BIOSes. Switch this option on if |
| 1637 | your computer crashes instead of powering off properly. |
| 1638 | |
| 1639 | endif # APM |
| 1640 | |
| 1641 | source "arch/x86/kernel/cpu/cpufreq/Kconfig" |
| 1642 | |
| 1643 | source "drivers/cpuidle/Kconfig" |
| 1644 | |
Andy Henroid | 27471fd | 2008-10-09 11:45:22 -0700 | [diff] [blame] | 1645 | source "drivers/idle/Kconfig" |
| 1646 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1647 | endmenu |
| 1648 | |
| 1649 | |
| 1650 | menu "Bus options (PCI etc.)" |
| 1651 | |
| 1652 | config PCI |
Ingo Molnar | 1ac9701 | 2008-05-19 14:10:14 +0200 | [diff] [blame] | 1653 | bool "PCI support" |
Adrian Bunk | 1c85808 | 2008-01-30 13:32:32 +0100 | [diff] [blame] | 1654 | default y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1655 | select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC) |
| 1656 | help |
| 1657 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 1658 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 1659 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 1660 | VESA. If you have PCI, say Y, otherwise N. |
| 1661 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1662 | choice |
| 1663 | prompt "PCI access mode" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1664 | depends on X86_32 && PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1665 | default PCI_GOANY |
| 1666 | ---help--- |
| 1667 | On PCI systems, the BIOS can be used to detect the PCI devices and |
| 1668 | determine their configuration. However, some old PCI motherboards |
| 1669 | have BIOS bugs and may crash if this is done. Also, some embedded |
| 1670 | PCI-based systems don't have any BIOS at all. Linux can also try to |
| 1671 | detect the PCI hardware directly without using the BIOS. |
| 1672 | |
| 1673 | With this option, you can specify how Linux should detect the |
| 1674 | PCI devices. If you choose "BIOS", the BIOS will be used, |
| 1675 | if you choose "Direct", the BIOS won't be used, and if you |
| 1676 | choose "MMConfig", then PCI Express MMCONFIG will be used. |
| 1677 | If you choose "Any", the kernel will try MMCONFIG, then the |
| 1678 | direct access method and falls back to the BIOS if that doesn't |
| 1679 | work. If unsure, go with the default, which is "Any". |
| 1680 | |
| 1681 | config PCI_GOBIOS |
| 1682 | bool "BIOS" |
| 1683 | |
| 1684 | config PCI_GOMMCONFIG |
| 1685 | bool "MMConfig" |
| 1686 | |
| 1687 | config PCI_GODIRECT |
| 1688 | bool "Direct" |
| 1689 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1690 | config PCI_GOOLPC |
| 1691 | bool "OLPC" |
| 1692 | depends on OLPC |
| 1693 | |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 1694 | config PCI_GOANY |
| 1695 | bool "Any" |
| 1696 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1697 | endchoice |
| 1698 | |
| 1699 | config PCI_BIOS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1700 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1701 | depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1702 | |
| 1703 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. |
| 1704 | config PCI_DIRECT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1705 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1706 | depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC)) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1707 | |
| 1708 | config PCI_MMCONFIG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1709 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1710 | depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1711 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1712 | config PCI_OLPC |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 1713 | def_bool y |
| 1714 | depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY) |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1715 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1716 | config PCI_DOMAINS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1717 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1718 | depends on PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1719 | |
| 1720 | config PCI_MMCONFIG |
| 1721 | bool "Support mmconfig PCI config space access" |
| 1722 | depends on X86_64 && PCI && ACPI |
| 1723 | |
| 1724 | config DMAR |
| 1725 | bool "Support for DMA Remapping Devices (EXPERIMENTAL)" |
| 1726 | depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL |
| 1727 | help |
| 1728 | DMA remapping (DMAR) devices support enables independent address |
| 1729 | translations for Direct Memory Access (DMA) from devices. |
| 1730 | These DMA remapping devices are reported via ACPI tables |
| 1731 | and include PCI device scope covered by these DMA |
| 1732 | remapping devices. |
| 1733 | |
| 1734 | config DMAR_GFX_WA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1735 | def_bool y |
| 1736 | prompt "Support for Graphics workaround" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1737 | depends on DMAR |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1738 | help |
| 1739 | Current Graphics drivers tend to use physical address |
| 1740 | for DMA and avoid using DMA APIs. Setting this config |
| 1741 | option permits the IOMMU driver to set a unity map for |
| 1742 | all the OS-visible memory. Hence the driver can continue |
| 1743 | to use physical addresses for DMA. |
| 1744 | |
| 1745 | config DMAR_FLOPPY_WA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1746 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1747 | depends on DMAR |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1748 | help |
| 1749 | Floppy disk drivers are know to bypass DMA API calls |
| 1750 | thereby failing to work when IOMMU is enabled. This |
| 1751 | workaround will setup a 1:1 mapping for the first |
| 1752 | 16M to make floppy (an ISA device) work. |
| 1753 | |
Suresh Siddha | 9fa8c48 | 2008-07-10 11:17:00 -0700 | [diff] [blame] | 1754 | config INTR_REMAP |
| 1755 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
| 1756 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL |
| 1757 | help |
| 1758 | Supports Interrupt remapping for IO-APIC and MSI devices. |
| 1759 | To use x2apic mode in the CPU's which support x2APIC enhancements or |
| 1760 | to support platforms with CPU's having > 8 bit APIC ID, say Y. |
| 1761 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1762 | source "drivers/pci/pcie/Kconfig" |
| 1763 | |
| 1764 | source "drivers/pci/Kconfig" |
| 1765 | |
| 1766 | # x86_64 have no ISA slots, but do have ISA-style DMA. |
| 1767 | config ISA_DMA_API |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1768 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1769 | |
| 1770 | if X86_32 |
| 1771 | |
| 1772 | config ISA |
| 1773 | bool "ISA support" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1774 | depends on !X86_VOYAGER |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1775 | help |
| 1776 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 1777 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 1778 | inside your box. Other bus systems are PCI, EISA, MicroChannel |
| 1779 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; |
| 1780 | newer boards don't support it. If you have ISA, say Y, otherwise N. |
| 1781 | |
| 1782 | config EISA |
| 1783 | bool "EISA support" |
| 1784 | depends on ISA |
| 1785 | ---help--- |
| 1786 | The Extended Industry Standard Architecture (EISA) bus was |
| 1787 | developed as an open alternative to the IBM MicroChannel bus. |
| 1788 | |
| 1789 | The EISA bus provided some of the features of the IBM MicroChannel |
| 1790 | bus while maintaining backward compatibility with cards made for |
| 1791 | the older ISA bus. The EISA bus saw limited use between 1988 and |
| 1792 | 1995 when it was made obsolete by the PCI bus. |
| 1793 | |
| 1794 | Say Y here if you are building a kernel for an EISA-based machine. |
| 1795 | |
| 1796 | Otherwise, say N. |
| 1797 | |
| 1798 | source "drivers/eisa/Kconfig" |
| 1799 | |
| 1800 | config MCA |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1801 | bool "MCA support" if !X86_VOYAGER |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1802 | default y if X86_VOYAGER |
| 1803 | help |
| 1804 | MicroChannel Architecture is found in some IBM PS/2 machines and |
| 1805 | laptops. It is a bus system similar to PCI or ISA. See |
| 1806 | <file:Documentation/mca.txt> (and especially the web page given |
| 1807 | there) before attempting to build an MCA bus kernel. |
| 1808 | |
| 1809 | source "drivers/mca/Kconfig" |
| 1810 | |
| 1811 | config SCx200 |
| 1812 | tristate "NatSemi SCx200 support" |
| 1813 | depends on !X86_VOYAGER |
| 1814 | help |
| 1815 | This provides basic support for National Semiconductor's |
| 1816 | (now AMD's) Geode processors. The driver probes for the |
| 1817 | PCI-IDs of several on-chip devices, so its a good dependency |
| 1818 | for other scx200_* drivers. |
| 1819 | |
| 1820 | If compiled as a module, the driver is named scx200. |
| 1821 | |
| 1822 | config SCx200HR_TIMER |
| 1823 | tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" |
| 1824 | depends on SCx200 && GENERIC_TIME |
| 1825 | default y |
| 1826 | help |
| 1827 | This driver provides a clocksource built upon the on-chip |
| 1828 | 27MHz high-resolution timer. Its also a workaround for |
| 1829 | NSC Geode SC-1100's buggy TSC, which loses time when the |
| 1830 | processor goes idle (as is done by the scheduler). The |
| 1831 | other workaround is idle=poll boot option. |
| 1832 | |
| 1833 | config GEODE_MFGPT_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1834 | def_bool y |
| 1835 | prompt "Geode Multi-Function General Purpose Timer (MFGPT) events" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1836 | depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1837 | help |
| 1838 | This driver provides a clock event source based on the MFGPT |
| 1839 | timer(s) in the CS5535 and CS5536 companion chip for the geode. |
| 1840 | MFGPTs have a better resolution and max interval than the |
| 1841 | generic PIT, and are suitable for use as high-res timers. |
| 1842 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1843 | config OLPC |
| 1844 | bool "One Laptop Per Child support" |
| 1845 | default n |
| 1846 | help |
| 1847 | Add support for detecting the unique features of the OLPC |
| 1848 | XO hardware. |
| 1849 | |
Sam Ravnborg | bc0120f | 2007-11-06 23:10:39 +0100 | [diff] [blame] | 1850 | endif # X86_32 |
| 1851 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1852 | config K8_NB |
| 1853 | def_bool y |
Sam Ravnborg | bc0120f | 2007-11-06 23:10:39 +0100 | [diff] [blame] | 1854 | depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA))) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1855 | |
| 1856 | source "drivers/pcmcia/Kconfig" |
| 1857 | |
| 1858 | source "drivers/pci/hotplug/Kconfig" |
| 1859 | |
| 1860 | endmenu |
| 1861 | |
| 1862 | |
| 1863 | menu "Executable file formats / Emulations" |
| 1864 | |
| 1865 | source "fs/Kconfig.binfmt" |
| 1866 | |
| 1867 | config IA32_EMULATION |
| 1868 | bool "IA32 Emulation" |
| 1869 | depends on X86_64 |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 1870 | select COMPAT_BINFMT_ELF |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1871 | help |
| 1872 | Include code to run 32-bit programs under a 64-bit kernel. You should |
| 1873 | likely turn this on, unless you're 100% sure that you don't have any |
| 1874 | 32-bit programs left. |
| 1875 | |
| 1876 | config IA32_AOUT |
| 1877 | tristate "IA32 a.out support" |
David Woodhouse | 6b213e1 | 2008-06-16 12:39:13 +0100 | [diff] [blame] | 1878 | depends on IA32_EMULATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1879 | help |
| 1880 | Support old a.out binaries in the 32bit emulation. |
| 1881 | |
| 1882 | config COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1883 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1884 | depends on IA32_EMULATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1885 | |
| 1886 | config COMPAT_FOR_U64_ALIGNMENT |
| 1887 | def_bool COMPAT |
| 1888 | depends on X86_64 |
| 1889 | |
| 1890 | config SYSVIPC_COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1891 | def_bool y |
Alexey Dobriyan | b899219 | 2008-09-14 13:44:41 +0400 | [diff] [blame] | 1892 | depends on COMPAT && SYSVIPC |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1893 | |
| 1894 | endmenu |
| 1895 | |
| 1896 | |
| 1897 | source "net/Kconfig" |
| 1898 | |
| 1899 | source "drivers/Kconfig" |
| 1900 | |
| 1901 | source "drivers/firmware/Kconfig" |
| 1902 | |
| 1903 | source "fs/Kconfig" |
| 1904 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1905 | source "arch/x86/Kconfig.debug" |
| 1906 | |
| 1907 | source "security/Kconfig" |
| 1908 | |
| 1909 | source "crypto/Kconfig" |
| 1910 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 1911 | source "arch/x86/kvm/Kconfig" |
| 1912 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1913 | source "lib/Kconfig" |