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" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 8 | ---help--- |
Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 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 |
Hitoshi Mitake | 2c5643b | 2008-11-30 17:16:04 +0900 | [diff] [blame] | 22 | select HAVE_READQ |
| 23 | select HAVE_WRITEQ |
Ingo Molnar | a5574cf | 2008-05-05 23:19:50 +0200 | [diff] [blame] | 24 | select HAVE_UNSTABLE_SCHED_CLOCK |
Sam Ravnborg | ec7748b | 2008-02-09 10:46:40 +0100 | [diff] [blame] | 25 | select HAVE_IDE |
Mathieu Desnoyers | 42d4b83 | 2008-02-02 15:10:34 -0500 | [diff] [blame] | 26 | select HAVE_OPROFILE |
Rik van Riel | 28b2ee2 | 2008-07-23 21:27:05 -0700 | [diff] [blame] | 27 | select HAVE_IOREMAP_PROT |
Mathieu Desnoyers | 3f55009 | 2008-02-02 15:10:35 -0500 | [diff] [blame] | 28 | select HAVE_KPROBES |
Ingo Molnar | 1f97276 | 2008-07-26 13:52:50 +0200 | [diff] [blame] | 29 | select ARCH_WANT_OPTIONAL_GPIOLIB |
Ingo Molnar | da4276b | 2009-01-07 11:05:10 +0100 | [diff] [blame] | 30 | select ARCH_WANT_FRAME_POINTERS |
Ananth N Mavinakayanahalli | 9edddaa | 2008-03-04 14:28:37 -0800 | [diff] [blame] | 31 | select HAVE_KRETPROBES |
Steven Rostedt | e4b2b88 | 2008-08-14 15:45:11 -0400 | [diff] [blame] | 32 | select HAVE_FTRACE_MCOUNT_RECORD |
Steven Rostedt | 677aa9f | 2008-05-17 00:01:36 -0400 | [diff] [blame] | 33 | select HAVE_DYNAMIC_FTRACE |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 34 | select HAVE_FUNCTION_TRACER |
Frederic Weisbecker | 48d68b2 | 2008-12-02 00:20:39 +0100 | [diff] [blame] | 35 | select HAVE_FUNCTION_GRAPH_TRACER |
Steven Rostedt | 60a7ecf | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 36 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST |
Steven Rostedt | 9a5fd90 | 2009-02-06 01:14:26 -0500 | [diff] [blame] | 37 | select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE |
Frederic Weisbecker | 1b3fa2ce | 2009-03-07 05:53:00 +0100 | [diff] [blame] | 38 | select HAVE_FTRACE_SYSCALLS |
Ingo Molnar | e0ec948 | 2009-01-27 17:01:14 +0100 | [diff] [blame] | 39 | select HAVE_KVM |
Ingo Molnar | 49793b0 | 2009-01-27 17:02:29 +0100 | [diff] [blame] | 40 | select HAVE_ARCH_KGDB |
Roland McGrath | 99bbc4b | 2008-04-20 14:35:12 -0700 | [diff] [blame] | 41 | select HAVE_ARCH_TRACEHOOK |
Dmitry Baryshkov | 323ec00 | 2008-06-29 14:19:31 +0400 | [diff] [blame] | 42 | select HAVE_GENERIC_DMA_COHERENT if X86_32 |
Johannes Berg | 58340a0 | 2008-07-25 01:45:33 -0700 | [diff] [blame] | 43 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
Török Edwin | 8d26487 | 2008-11-23 12:39:08 +0200 | [diff] [blame] | 44 | select USER_STACKTRACE_SUPPORT |
Joerg Roedel | 2118d0c | 2009-01-09 15:13:15 +0100 | [diff] [blame] | 45 | select HAVE_DMA_API_DEBUG |
H. Peter Anvin | 2e9f3bd | 2009-01-04 15:41:25 -0800 | [diff] [blame] | 46 | select HAVE_KERNEL_GZIP |
| 47 | select HAVE_KERNEL_BZIP2 |
| 48 | select HAVE_KERNEL_LZMA |
Balbir Singh | 7d8330a | 2008-02-10 12:46:28 +0530 | [diff] [blame] | 49 | |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 50 | config ARCH_DEFCONFIG |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 51 | string |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 52 | default "arch/x86/configs/i386_defconfig" if X86_32 |
| 53 | default "arch/x86/configs/x86_64_defconfig" if X86_64 |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 54 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 55 | config GENERIC_TIME |
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 | |
| 58 | config GENERIC_CMOS_UPDATE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 59 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 60 | |
| 61 | config CLOCKSOURCE_WATCHDOG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 62 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 63 | |
| 64 | config GENERIC_CLOCKEVENTS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 65 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 66 | |
| 67 | config GENERIC_CLOCKEVENTS_BROADCAST |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 68 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 69 | depends on X86_64 || (X86_32 && X86_LOCAL_APIC) |
| 70 | |
| 71 | config LOCKDEP_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 72 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 73 | |
| 74 | config STACKTRACE_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 75 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 76 | |
Heiko Carstens | aa7d935 | 2008-02-01 17:45:14 +0100 | [diff] [blame] | 77 | config HAVE_LATENCYTOP_SUPPORT |
| 78 | def_bool y |
| 79 | |
Christoph Lameter | 1f84260 | 2008-01-07 23:20:30 -0800 | [diff] [blame] | 80 | config FAST_CMPXCHG_LOCAL |
| 81 | bool |
| 82 | default y |
| 83 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 84 | config MMU |
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 ZONE_DMA |
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 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 90 | config SBUS |
| 91 | bool |
| 92 | |
| 93 | config GENERIC_ISA_DMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 94 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 95 | |
| 96 | config GENERIC_IOMAP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 97 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 98 | |
| 99 | config GENERIC_BUG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 100 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 101 | depends on BUG |
Jan Beulich | b93a531 | 2008-12-16 11:40:27 +0000 | [diff] [blame] | 102 | select GENERIC_BUG_RELATIVE_POINTERS if X86_64 |
| 103 | |
| 104 | config GENERIC_BUG_RELATIVE_POINTERS |
| 105 | bool |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 106 | |
| 107 | config GENERIC_HWEIGHT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 108 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 109 | |
Florian Fainelli | a608295 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 110 | config GENERIC_GPIO |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 111 | bool |
Florian Fainelli | a608295 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 112 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 113 | config ARCH_MAY_HAVE_PC_FDC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 114 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 115 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 116 | config RWSEM_GENERIC_SPINLOCK |
| 117 | def_bool !X86_XADD |
| 118 | |
| 119 | config RWSEM_XCHGADD_ALGORITHM |
| 120 | def_bool X86_XADD |
| 121 | |
Venki Pallipadi | a6869cc | 2008-02-08 17:05:44 -0800 | [diff] [blame] | 122 | config ARCH_HAS_CPU_IDLE_WAIT |
| 123 | def_bool y |
| 124 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 125 | config GENERIC_CALIBRATE_DELAY |
| 126 | def_bool y |
| 127 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 128 | config GENERIC_TIME_VSYSCALL |
| 129 | bool |
| 130 | default X86_64 |
| 131 | |
venkatesh.pallipadi@intel.com | 9a0b841 | 2008-01-31 17:35:06 -0800 | [diff] [blame] | 132 | config ARCH_HAS_CPU_RELAX |
| 133 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 134 | |
Venkatesh Pallipadi | 89cedfe | 2008-10-16 19:00:08 -0400 | [diff] [blame] | 135 | config ARCH_HAS_DEFAULT_IDLE |
| 136 | def_bool y |
| 137 | |
Pekka Enberg | 1b27d05 | 2008-04-28 02:12:22 -0700 | [diff] [blame] | 138 | config ARCH_HAS_CACHE_LINE_SIZE |
| 139 | def_bool y |
| 140 | |
Mike Travis | dd5af90 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 141 | config HAVE_SETUP_PER_CPU_AREA |
Brian Gerst | 89c9c4c | 2009-01-27 12:56:48 +0900 | [diff] [blame] | 142 | def_bool y |
travis@sgi.com | b32ef63 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 143 | |
Tejun Heo | 1112441 | 2009-02-20 16:29:09 +0900 | [diff] [blame] | 144 | config HAVE_DYNAMIC_PER_CPU_AREA |
| 145 | def_bool y |
| 146 | |
Mike Travis | 9f0e8d0 | 2008-04-04 18:11:01 -0700 | [diff] [blame] | 147 | config HAVE_CPUMASK_OF_CPU_MAP |
| 148 | def_bool X86_64_SMP |
| 149 | |
Johannes Berg | 801e406 | 2007-12-08 02:12:39 +0100 | [diff] [blame] | 150 | config ARCH_HIBERNATION_POSSIBLE |
| 151 | def_bool y |
Johannes Berg | 801e406 | 2007-12-08 02:12:39 +0100 | [diff] [blame] | 152 | |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 153 | config ARCH_SUSPEND_POSSIBLE |
| 154 | def_bool y |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 155 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 156 | config ZONE_DMA32 |
| 157 | bool |
| 158 | default X86_64 |
| 159 | |
| 160 | config ARCH_POPULATES_NODE_MAP |
| 161 | def_bool y |
| 162 | |
| 163 | config AUDIT_ARCH |
| 164 | bool |
| 165 | default X86_64 |
| 166 | |
Ingo Molnar | 765c68b | 2008-04-09 11:03:37 +0200 | [diff] [blame] | 167 | config ARCH_SUPPORTS_OPTIMIZED_INLINING |
| 168 | def_bool y |
| 169 | |
Akinobu Mita | 6a11f75 | 2009-03-31 15:23:17 -0700 | [diff] [blame] | 170 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 171 | def_bool y |
| 172 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 173 | # Use the generic interrupt handling code in kernel/irq/: |
| 174 | config GENERIC_HARDIRQS |
| 175 | bool |
| 176 | default y |
| 177 | |
Thomas Gleixner | f9a36fa | 2009-03-13 16:37:48 +0100 | [diff] [blame] | 178 | config GENERIC_HARDIRQS_NO__DO_IRQ |
| 179 | def_bool y |
| 180 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 181 | config GENERIC_IRQ_PROBE |
| 182 | bool |
| 183 | default y |
| 184 | |
| 185 | config GENERIC_PENDING_IRQ |
| 186 | bool |
| 187 | depends on GENERIC_HARDIRQS && SMP |
| 188 | default y |
| 189 | |
James Bottomley | 6cd10f8 | 2008-11-09 11:53:14 -0600 | [diff] [blame] | 190 | config USE_GENERIC_SMP_HELPERS |
| 191 | def_bool y |
| 192 | depends on SMP |
| 193 | |
Sam Ravnborg | 6b0c3d4 | 2008-01-30 13:32:27 +0100 | [diff] [blame] | 194 | config X86_32_SMP |
| 195 | def_bool y |
| 196 | depends on X86_32 && SMP |
| 197 | |
| 198 | config X86_64_SMP |
| 199 | def_bool y |
| 200 | depends on X86_64 && SMP |
| 201 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 202 | config X86_HT |
| 203 | bool |
Adrian Bunk | ee0011a | 2007-12-04 17:19:07 +0100 | [diff] [blame] | 204 | depends on SMP |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 205 | default y |
| 206 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 207 | config X86_TRAMPOLINE |
| 208 | bool |
Ingo Molnar | 3e5095d | 2009-01-27 17:07:08 +0100 | [diff] [blame] | 209 | depends on SMP || (64BIT && ACPI_SLEEP) |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 210 | default y |
| 211 | |
Tejun Heo | ccbeed3 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 212 | config X86_32_LAZY_GS |
| 213 | def_bool y |
Tejun Heo | 60a5317 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 214 | depends on X86_32 && !CC_STACKPROTECTOR |
Tejun Heo | ccbeed3 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 215 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 216 | config KTIME_SCALAR |
| 217 | def_bool X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 218 | source "init/Kconfig" |
Matt Helsley | dc52ddc | 2008-10-18 20:27:21 -0700 | [diff] [blame] | 219 | source "kernel/Kconfig.freezer" |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 220 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 221 | menu "Processor type and features" |
| 222 | |
| 223 | source "kernel/time/Kconfig" |
| 224 | |
| 225 | config SMP |
| 226 | bool "Symmetric multi-processing support" |
| 227 | ---help--- |
| 228 | This enables support for systems with more than one CPU. If you have |
| 229 | a system with only one CPU, like most personal computers, say N. If |
| 230 | you have a system with more than one CPU, say Y. |
| 231 | |
| 232 | If you say N here, the kernel will run on single and multiprocessor |
| 233 | machines, but will use only one CPU of a multiprocessor machine. If |
| 234 | you say Y here, the kernel will run on many, but not all, |
| 235 | singleprocessor machines. On a singleprocessor machine, the kernel |
| 236 | will run faster if you say N here. |
| 237 | |
| 238 | Note that if you say Y here and choose architecture "586" or |
| 239 | "Pentium" under "Processor family", the kernel will not work on 486 |
| 240 | architectures. Similarly, multiprocessor kernels for the "PPro" |
| 241 | architecture may not work on all Pentium based boards. |
| 242 | |
| 243 | People using multiprocessor machines who say Y here should also say |
| 244 | Y to "Enhanced Real Time Clock Support", below. The "Advanced Power |
| 245 | Management" code will be disabled if you say Y here. |
| 246 | |
Adrian Bunk | 03502fa | 2008-02-03 15:50:21 +0200 | [diff] [blame] | 247 | See also <file:Documentation/i386/IO-APIC.txt>, |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 248 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
| 249 | <http://www.tldp.org/docs.html#howto>. |
| 250 | |
| 251 | If you don't know what to do here, say N. |
| 252 | |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 253 | config X86_X2APIC |
| 254 | bool "Support x2apic" |
David Woodhouse | f7d7f86 | 2009-04-06 23:04:40 -0700 | [diff] [blame] | 255 | depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 256 | ---help--- |
| 257 | This enables x2apic support on CPUs that have this feature. |
| 258 | |
| 259 | This allows 32-bit apic IDs (so it can support very large systems), |
| 260 | and accesses the local apic via MSRs not via mmio. |
| 261 | |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 262 | If you don't know what to do here, say N. |
| 263 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 264 | config SPARSE_IRQ |
| 265 | bool "Support sparse irq numbering" |
Yinghai Lu | 17483a1 | 2008-12-12 13:14:18 -0800 | [diff] [blame] | 266 | depends on PCI_MSI || HT_IRQ |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 267 | ---help--- |
Ingo Molnar | 973656f | 2008-12-25 16:26:47 +0100 | [diff] [blame] | 268 | This enables support for sparse irqs. This is useful for distro |
| 269 | kernels that want to define a high CONFIG_NR_CPUS value but still |
| 270 | want to have low kernel memory footprint on smaller machines. |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 271 | |
Ingo Molnar | 973656f | 2008-12-25 16:26:47 +0100 | [diff] [blame] | 272 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread |
| 273 | out the irq_desc[] array in a more NUMA-friendly way. ) |
| 274 | |
| 275 | If you don't know what to do here, say N. |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 276 | |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 277 | config NUMA_MIGRATE_IRQ_DESC |
| 278 | bool "Move irq desc when changing irq smp_affinity" |
Yinghai Lu | b909895 | 2008-12-19 13:48:34 -0800 | [diff] [blame] | 279 | depends on SPARSE_IRQ && NUMA |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 280 | default n |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 281 | ---help--- |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 282 | This enables moving irq_desc to cpu/node that irq will use handled. |
| 283 | |
| 284 | If you don't know what to do here, say N. |
| 285 | |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 286 | config X86_MPPARSE |
Jan Beulich | 7a52768 | 2008-10-30 10:38:24 +0000 | [diff] [blame] | 287 | bool "Enable MPS table" if ACPI |
| 288 | default y |
Ingo Molnar | 5ab7472 | 2008-07-10 14:42:03 +0200 | [diff] [blame] | 289 | depends on X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 290 | ---help--- |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 291 | For old smp systems that do not have proper acpi support. Newer systems |
| 292 | (esp with 64bit cpus) with acpi support, MADT and DSDT will override it |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 293 | |
Yinghai Lu | 26f7ef1 | 2009-01-29 14:19:22 -0800 | [diff] [blame] | 294 | config X86_BIGSMP |
| 295 | bool "Support for big SMP systems with more than 8 CPUs" |
| 296 | depends on X86_32 && SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 297 | ---help--- |
Yinghai Lu | 26f7ef1 | 2009-01-29 14:19:22 -0800 | [diff] [blame] | 298 | This option is needed for the systems that have more than 8 CPUs |
| 299 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 300 | if X86_32 |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 301 | config X86_EXTENDED_PLATFORM |
| 302 | bool "Support for extended (non-PC) x86 platforms" |
| 303 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 304 | ---help--- |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 305 | If you disable this option then the kernel will only support |
| 306 | standard PC platforms. (which covers the vast majority of |
| 307 | systems out there.) |
| 308 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 309 | If you enable this option then you'll be able to select support |
| 310 | for the following (non-PC) 32 bit x86 platforms: |
| 311 | AMD Elan |
| 312 | NUMAQ (IBM/Sequent) |
| 313 | RDC R-321x SoC |
| 314 | SGI 320/540 (Visual Workstation) |
| 315 | Summit/EXA (IBM x440) |
| 316 | Unisys ES7000 IA32 series |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 317 | |
| 318 | If you have one of these systems, or if you want to build a |
| 319 | generic distribution kernel, say Y here - otherwise say N. |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 320 | endif |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 321 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 322 | if X86_64 |
| 323 | config X86_EXTENDED_PLATFORM |
| 324 | bool "Support for extended (non-PC) x86 platforms" |
| 325 | default y |
| 326 | ---help--- |
| 327 | If you disable this option then the kernel will only support |
| 328 | standard PC platforms. (which covers the vast majority of |
| 329 | systems out there.) |
| 330 | |
| 331 | If you enable this option then you'll be able to select support |
| 332 | for the following (non-PC) 64 bit x86 platforms: |
| 333 | ScaleMP vSMP |
| 334 | SGI Ultraviolet |
| 335 | |
| 336 | If you have one of these systems, or if you want to build a |
| 337 | generic distribution kernel, say Y here - otherwise say N. |
| 338 | endif |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 339 | # This is an alphabetically sorted list of 64 bit extended platforms |
| 340 | # Please maintain the alphabetic order if and when there are additions |
Nick Piggin | 03b4863 | 2009-01-20 04:36:04 +0100 | [diff] [blame] | 341 | |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 342 | config X86_VSMP |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 343 | bool "ScaleMP vSMP" |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 344 | select PARAVIRT |
| 345 | depends on X86_64 && PCI |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 346 | depends on X86_EXTENDED_PLATFORM |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 347 | ---help--- |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 348 | Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is |
| 349 | supposed to run on these EM64T-based machines. Only choose this option |
| 350 | if you have one of these machines. |
| 351 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 352 | config X86_UV |
| 353 | bool "SGI Ultraviolet" |
| 354 | depends on X86_64 |
| 355 | depends on X86_EXTENDED_PLATFORM |
Jack Steiner | 54c28d2 | 2009-04-03 15:39:42 -0500 | [diff] [blame] | 356 | depends on NUMA |
Ingo Molnar | 7d01d32 | 2009-02-17 12:33:20 +0100 | [diff] [blame] | 357 | select X86_X2APIC |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 358 | ---help--- |
| 359 | This option is needed in order to support SGI Ultraviolet systems. |
| 360 | If you don't have one of these, you should say N here. |
| 361 | |
| 362 | # Following is an alphabetically sorted list of 32 bit extended platforms |
| 363 | # Please maintain the alphabetic order if and when there are additions |
| 364 | |
Ingo Molnar | 9e111f3 | 2009-01-27 18:18:25 +0100 | [diff] [blame] | 365 | config X86_ELAN |
| 366 | bool "AMD Elan" |
| 367 | depends on X86_32 |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 368 | depends on X86_EXTENDED_PLATFORM |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 369 | ---help--- |
Ingo Molnar | 9e111f3 | 2009-01-27 18:18:25 +0100 | [diff] [blame] | 370 | Select this for an AMD Elan processor. |
| 371 | |
| 372 | Do not use this option for K6/Athlon/Opteron processors! |
| 373 | |
| 374 | If unsure, choose "PC-compatible" instead. |
| 375 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 376 | config X86_RDC321X |
| 377 | bool "RDC R-321x SoC" |
| 378 | depends on X86_32 |
| 379 | depends on X86_EXTENDED_PLATFORM |
| 380 | select M486 |
| 381 | select X86_REBOOTFIXUPS |
| 382 | ---help--- |
| 383 | This option is needed for RDC R-321x system-on-chip, also known |
| 384 | as R-8610-(G). |
| 385 | If you don't have one of these chips, you should say N here. |
| 386 | |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 387 | config X86_32_NON_STANDARD |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 388 | bool "Support non-standard 32-bit SMP architectures" |
| 389 | depends on X86_32 && SMP |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 390 | depends on X86_EXTENDED_PLATFORM |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 391 | ---help--- |
| 392 | This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 393 | subarchitectures. It is intended for a generic binary kernel. |
| 394 | if you select them all, kernel will probe it one by one. and will |
| 395 | fallback to default. |
| 396 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 397 | # Alphabetically sorted list of Non standard 32 bit platforms |
| 398 | |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 399 | config X86_NUMAQ |
| 400 | bool "NUMAQ (IBM/Sequent)" |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 401 | depends on X86_32_NON_STANDARD |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 402 | select NUMA |
| 403 | select X86_MPPARSE |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 404 | ---help--- |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 405 | This option is used for getting Linux to run on a NUMAQ (IBM/Sequent) |
| 406 | NUMA multiquad box. This changes the way that processors are |
| 407 | bootstrapped, and uses Clustered Logical APIC addressing mode instead |
| 408 | of Flat Logical. You will need a new lynxer.elf file to flash your |
| 409 | firmware with - send email to <Martin.Bligh@us.ibm.com>. |
| 410 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 411 | config X86_VISWS |
| 412 | bool "SGI 320/540 (Visual Workstation)" |
| 413 | depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT |
| 414 | depends on X86_32_NON_STANDARD |
| 415 | ---help--- |
| 416 | The SGI Visual Workstation series is an IA32-based workstation |
| 417 | based on SGI systems chips with some legacy PC hardware attached. |
| 418 | |
| 419 | Say Y here to create a kernel to run on the SGI 320 or 540. |
| 420 | |
| 421 | A kernel compiled for the Visual Workstation will run on general |
| 422 | PCs as well. See <file:Documentation/sgi-visws.txt> for details. |
| 423 | |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 424 | config X86_SUMMIT |
| 425 | bool "Summit/EXA (IBM x440)" |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 426 | depends on X86_32_NON_STANDARD |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 427 | ---help--- |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 428 | This option is needed for IBM systems that use the Summit/EXA chipset. |
| 429 | In particular, it is needed for the x440. |
| 430 | |
| 431 | config X86_ES7000 |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 432 | bool "Unisys ES7000 IA32 series" |
Yinghai Lu | 26f7ef1 | 2009-01-29 14:19:22 -0800 | [diff] [blame] | 433 | depends on X86_32_NON_STANDARD && X86_BIGSMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 434 | ---help--- |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 435 | Support for Unisys ES7000 systems. Say 'Y' here if this kernel is |
| 436 | supposed to run on an IA32-based Unisys ES7000 system. |
| 437 | |
Ingo Molnar | ae1e913 | 2008-11-11 09:05:16 +0100 | [diff] [blame] | 438 | config SCHED_OMIT_FRAME_POINTER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 439 | def_bool y |
| 440 | prompt "Single-depth WCHAN output" |
Ken Chen | a87d091 | 2008-11-06 11:10:49 -0800 | [diff] [blame] | 441 | depends on X86 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 442 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 443 | Calculate simpler /proc/<PID>/wchan values. If this option |
| 444 | is disabled then wchan values will recurse back to the |
| 445 | caller function. This provides more accurate wchan values, |
| 446 | at the expense of slightly more scheduling overhead. |
| 447 | |
| 448 | If in doubt, say "Y". |
| 449 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 450 | menuconfig PARAVIRT_GUEST |
| 451 | bool "Paravirtualized guest support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 452 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 453 | Say Y here to get to see options related to running Linux under |
| 454 | various hypervisors. This option alone does not add any kernel code. |
| 455 | |
| 456 | If you say N, all options in this submenu will be skipped and disabled. |
| 457 | |
| 458 | if PARAVIRT_GUEST |
| 459 | |
| 460 | source "arch/x86/xen/Kconfig" |
| 461 | |
| 462 | config VMI |
| 463 | bool "VMI Guest support" |
| 464 | select PARAVIRT |
Eduardo Pereira Habkost | 42d545c | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 465 | depends on X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 466 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 467 | VMI provides a paravirtualized interface to the VMware ESX server |
| 468 | (it could be used by other hypervisors in theory too, but is not |
| 469 | at the moment), by linking the kernel to a GPL-ed ROM module |
| 470 | provided by the hypervisor. |
| 471 | |
Glauber de Oliveira Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 472 | config KVM_CLOCK |
| 473 | bool "KVM paravirtualized clock" |
| 474 | select PARAVIRT |
Gerd Hoffmann | f6e16d5 | 2008-06-03 16:17:32 +0200 | [diff] [blame] | 475 | select PARAVIRT_CLOCK |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 476 | ---help--- |
Glauber de Oliveira Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 477 | Turning on this option will allow you to run a paravirtualized clock |
| 478 | when running over the KVM hypervisor. Instead of relying on a PIT |
| 479 | (or probably other) emulation by the underlying device model, the host |
| 480 | provides the guest with timing infrastructure such as time of day, and |
| 481 | system time |
| 482 | |
Marcelo Tosatti | 0cf1bfd | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 483 | config KVM_GUEST |
| 484 | bool "KVM Guest support" |
| 485 | select PARAVIRT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 486 | ---help--- |
| 487 | This option enables various optimizations for running under the KVM |
| 488 | hypervisor. |
Marcelo Tosatti | 0cf1bfd | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 489 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 490 | source "arch/x86/lguest/Kconfig" |
| 491 | |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 492 | config PARAVIRT |
| 493 | bool "Enable paravirtualization code" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 494 | ---help--- |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 495 | This changes the kernel so it can modify itself when it is run |
| 496 | under a hypervisor, potentially improving performance significantly |
| 497 | over full virtualization. However, when run without a hypervisor |
| 498 | the kernel is theoretically slower and slightly larger. |
| 499 | |
Gerd Hoffmann | 7af192c | 2008-06-03 16:17:29 +0200 | [diff] [blame] | 500 | config PARAVIRT_CLOCK |
| 501 | bool |
| 502 | default n |
| 503 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 504 | endif |
| 505 | |
Jeremy Fitzhardinge | 9734913 | 2008-06-25 00:19:14 -0400 | [diff] [blame] | 506 | config PARAVIRT_DEBUG |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 507 | bool "paravirt-ops debugging" |
| 508 | depends on PARAVIRT && DEBUG_KERNEL |
| 509 | ---help--- |
| 510 | Enable to debug paravirt_ops internals. Specifically, BUG if |
| 511 | a paravirt_op is missing when it is called. |
Jeremy Fitzhardinge | 9734913 | 2008-06-25 00:19:14 -0400 | [diff] [blame] | 512 | |
Yinghai Lu | 0327318 | 2008-04-18 17:49:15 -0700 | [diff] [blame] | 513 | config MEMTEST |
| 514 | bool "Memtest" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 515 | ---help--- |
Yinghai Lu | c64df70 | 2008-03-21 18:56:19 -0700 | [diff] [blame] | 516 | This option adds a kernel parameter 'memtest', which allows memtest |
Yinghai Lu | 0327318 | 2008-04-18 17:49:15 -0700 | [diff] [blame] | 517 | to be set. |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 518 | memtest=0, mean disabled; -- default |
| 519 | memtest=1, mean do 1 test pattern; |
| 520 | ... |
| 521 | memtest=4, mean do 4 test patterns. |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 522 | If you are unsure how to answer this question, answer N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 523 | |
| 524 | config X86_SUMMIT_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 525 | def_bool y |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 526 | depends on X86_32 && NUMA && X86_32_NON_STANDARD |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 527 | |
| 528 | config X86_CYCLONE_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 529 | def_bool y |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 530 | depends on X86_32_NON_STANDARD |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 531 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 532 | source "arch/x86/Kconfig.cpu" |
| 533 | |
| 534 | config HPET_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 535 | def_bool X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 536 | prompt "HPET Timer Support" if X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 537 | ---help--- |
| 538 | Use the IA-PC HPET (High Precision Event Timer) to manage |
| 539 | time in preference to the PIT and RTC, if a HPET is |
| 540 | present. |
| 541 | HPET is the next generation timer replacing legacy 8254s. |
| 542 | The HPET provides a stable time base on SMP |
| 543 | systems, unlike the TSC, but it is more expensive to access, |
| 544 | as it is off-chip. You can find the HPET spec at |
| 545 | <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 546 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 547 | You can safely choose Y here. However, HPET will only be |
| 548 | activated if the platform and the BIOS support this feature. |
| 549 | Otherwise the 8254 will be used for timing services. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 550 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 551 | Choose N to continue using the legacy 8254 timer. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 552 | |
| 553 | config HPET_EMULATE_RTC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 554 | def_bool y |
Bernhard Walle | 9d8af78 | 2008-02-06 01:38:52 -0800 | [diff] [blame] | 555 | 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] | 556 | |
| 557 | # Mark as embedded because too many people got it wrong. |
| 558 | # The code disables itself when not needed. |
Thomas Petazzoni | 7ae9392 | 2008-04-28 02:14:14 -0700 | [diff] [blame] | 559 | config DMI |
| 560 | default y |
| 561 | bool "Enable DMI scanning" if EMBEDDED |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 562 | ---help--- |
Thomas Petazzoni | 7ae9392 | 2008-04-28 02:14:14 -0700 | [diff] [blame] | 563 | Enabled scanning of DMI to identify machine quirks. Say Y |
| 564 | here unless you have verified that your setup is not |
| 565 | affected by entries in the DMI blacklist. Required by PNP |
| 566 | BIOS code. |
| 567 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 568 | config GART_IOMMU |
| 569 | bool "GART IOMMU support" if EMBEDDED |
| 570 | default y |
| 571 | select SWIOTLB |
| 572 | select AGP |
| 573 | depends on X86_64 && PCI |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 574 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 575 | Support for full DMA access of devices with 32bit memory access only |
| 576 | on systems with more than 3GB. This is usually needed for USB, |
| 577 | sound, many IDE/SATA chipsets and some other devices. |
| 578 | Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART |
| 579 | based hardware IOMMU and a software bounce buffer based IOMMU used |
| 580 | on Intel systems and as fallback. |
| 581 | The code is only active when needed (enough memory and limited |
| 582 | device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified |
| 583 | too. |
| 584 | |
| 585 | config CALGARY_IOMMU |
| 586 | bool "IBM Calgary IOMMU support" |
| 587 | select SWIOTLB |
| 588 | depends on X86_64 && PCI && EXPERIMENTAL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 589 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 590 | Support for hardware IOMMUs in IBM's xSeries x366 and x460 |
| 591 | systems. Needed to run systems with more than 3GB of memory |
| 592 | properly with 32-bit PCI devices that do not support DAC |
| 593 | (Double Address Cycle). Calgary also supports bus level |
| 594 | isolation, where all DMAs pass through the IOMMU. This |
| 595 | prevents them from going anywhere except their intended |
| 596 | destination. This catches hard-to-find kernel bugs and |
| 597 | mis-behaving drivers and devices that do not use the DMA-API |
| 598 | properly to set up their DMA buffers. The IOMMU can be |
| 599 | turned off at boot time with the iommu=off parameter. |
| 600 | Normally the kernel will make the right choice by itself. |
| 601 | If unsure, say Y. |
| 602 | |
| 603 | config CALGARY_IOMMU_ENABLED_BY_DEFAULT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 604 | def_bool y |
| 605 | prompt "Should Calgary be enabled by default?" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 606 | depends on CALGARY_IOMMU |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 607 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 608 | Should Calgary be enabled by default? if you choose 'y', Calgary |
| 609 | will be used (if it exists). If you choose 'n', Calgary will not be |
| 610 | used even if it exists. If you choose 'n' and would like to use |
| 611 | Calgary anyway, pass 'iommu=calgary' on the kernel command line. |
| 612 | If unsure, say Y. |
| 613 | |
Joerg Roedel | 2b18872 | 2008-06-26 21:27:37 +0200 | [diff] [blame] | 614 | config AMD_IOMMU |
| 615 | bool "AMD IOMMU support" |
Ingo Molnar | 07c40e8 | 2008-06-27 11:31:28 +0200 | [diff] [blame] | 616 | select SWIOTLB |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 617 | select PCI_MSI |
Ingo Molnar | 24d2ba0 | 2008-06-27 10:37:03 +0200 | [diff] [blame] | 618 | depends on X86_64 && PCI && ACPI |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 619 | ---help--- |
Joerg Roedel | 18d2220 | 2008-07-03 19:35:06 +0200 | [diff] [blame] | 620 | With this option you can enable support for AMD IOMMU hardware in |
| 621 | your system. An IOMMU is a hardware component which provides |
| 622 | remapping of DMA memory accesses from devices. With an AMD IOMMU you |
| 623 | can isolate the the DMA memory of different devices and protect the |
| 624 | system from misbehaving device drivers or hardware. |
| 625 | |
| 626 | You can find out if your system has an AMD IOMMU if you look into |
| 627 | your BIOS for an option to enable it or if you have an IVRS ACPI |
| 628 | table. |
Joerg Roedel | 2b18872 | 2008-06-26 21:27:37 +0200 | [diff] [blame] | 629 | |
Joerg Roedel | 2e11760 | 2008-12-11 19:00:12 +0100 | [diff] [blame] | 630 | config AMD_IOMMU_STATS |
| 631 | bool "Export AMD IOMMU statistics to debugfs" |
| 632 | depends on AMD_IOMMU |
| 633 | select DEBUG_FS |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 634 | ---help--- |
Joerg Roedel | 2e11760 | 2008-12-11 19:00:12 +0100 | [diff] [blame] | 635 | This option enables code in the AMD IOMMU driver to collect various |
| 636 | statistics about whats happening in the driver and exports that |
| 637 | information to userspace via debugfs. |
| 638 | If unsure, say N. |
| 639 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 640 | # need this always selected by IOMMU for the VIA workaround |
| 641 | config SWIOTLB |
Joerg Roedel | a1afd01 | 2008-11-18 12:44:21 +0100 | [diff] [blame] | 642 | def_bool y if X86_64 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 643 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 644 | Support for software bounce buffers used on x86-64 systems |
| 645 | which don't have a hardware IOMMU (e.g. the current generation |
| 646 | of Intel's x86-64 CPUs). Using this PCI devices which can only |
| 647 | access 32-bits of memory can be used on systems with more than |
| 648 | 3 GB of memory. If unsure, say Y. |
| 649 | |
FUJITA Tomonori | a852250 | 2008-04-29 00:59:36 -0700 | [diff] [blame] | 650 | config IOMMU_HELPER |
FUJITA Tomonori | 18b743d | 2008-07-10 09:50:50 +0900 | [diff] [blame] | 651 | def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU) |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 652 | |
Joerg Roedel | 1aaf118 | 2008-11-26 17:25:13 +0100 | [diff] [blame] | 653 | config IOMMU_API |
| 654 | def_bool (AMD_IOMMU || DMAR) |
| 655 | |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 656 | config MAXSMP |
| 657 | bool "Configure Maximum number of SMP Processors and NUMA Nodes" |
Mike Travis | 36f5101 | 2008-12-16 17:33:51 -0800 | [diff] [blame] | 658 | depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL |
| 659 | select CPUMASK_OFFSTACK |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 660 | default n |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 661 | ---help--- |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 662 | Configure maximum number of CPUS and NUMA Nodes for this architecture. |
| 663 | If unsure, say N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 664 | |
| 665 | config NR_CPUS |
Mike Travis | 36f5101 | 2008-12-16 17:33:51 -0800 | [diff] [blame] | 666 | int "Maximum number of CPUs" if SMP && !MAXSMP |
Michael K. Johnson | 2a3313f | 2009-04-21 21:44:48 -0400 | [diff] [blame^] | 667 | range 2 8 if SMP && X86_32 && !X86_BIGSMP |
Mike Travis | 36f5101 | 2008-12-16 17:33:51 -0800 | [diff] [blame] | 668 | range 2 512 if SMP && !MAXSMP |
Mike Travis | 78637a97 | 2008-12-16 17:34:00 -0800 | [diff] [blame] | 669 | default "1" if !SMP |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 670 | default "4096" if MAXSMP |
Mike Travis | 78637a97 | 2008-12-16 17:34:00 -0800 | [diff] [blame] | 671 | default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000) |
| 672 | default "8" if SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 673 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 674 | This allows you to specify the maximum number of CPUs which this |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 675 | kernel will support. The maximum supported value is 512 and the |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 676 | minimum value which makes sense is 2. |
| 677 | |
| 678 | This is purely to save memory - each supported CPU adds |
| 679 | approximately eight kilobytes to the kernel image. |
| 680 | |
| 681 | config SCHED_SMT |
| 682 | bool "SMT (Hyperthreading) scheduler support" |
Hiroshi Shimamoto | b089c12 | 2008-02-27 13:16:30 -0800 | [diff] [blame] | 683 | depends on X86_HT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 684 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 685 | SMT scheduler support improves the CPU scheduler's decision making |
| 686 | when dealing with Intel Pentium 4 chips with HyperThreading at a |
| 687 | cost of slightly increased overhead in some places. If unsure say |
| 688 | N here. |
| 689 | |
| 690 | config SCHED_MC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 691 | def_bool y |
| 692 | prompt "Multi-core scheduler support" |
Hiroshi Shimamoto | b089c12 | 2008-02-27 13:16:30 -0800 | [diff] [blame] | 693 | depends on X86_HT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 694 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 695 | Multi-core scheduler support improves the CPU scheduler's decision |
| 696 | making when dealing with multi-core CPU chips at a cost of slightly |
| 697 | increased overhead in some places. If unsure say N here. |
| 698 | |
| 699 | source "kernel/Kconfig.preempt" |
| 700 | |
| 701 | config X86_UP_APIC |
| 702 | bool "Local APIC support on uniprocessors" |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 703 | depends on X86_32 && !SMP && !X86_32_NON_STANDARD |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 704 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 705 | A local APIC (Advanced Programmable Interrupt Controller) is an |
| 706 | integrated interrupt controller in the CPU. If you have a single-CPU |
| 707 | system which has a processor with a local APIC, you can say Y here to |
| 708 | enable and use it. If you say Y here even though your machine doesn't |
| 709 | have a local APIC, then the kernel will still run with no slowdown at |
| 710 | all. The local APIC supports CPU-generated self-interrupts (timer, |
| 711 | performance counters), and the NMI watchdog which detects hard |
| 712 | lockups. |
| 713 | |
| 714 | config X86_UP_IOAPIC |
| 715 | bool "IO-APIC support on uniprocessors" |
| 716 | depends on X86_UP_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 717 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 718 | An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an |
| 719 | SMP-capable replacement for PC-style interrupt controllers. Most |
| 720 | SMP systems and many recent uniprocessor systems have one. |
| 721 | |
| 722 | If you have a single-CPU system with an IO-APIC, you can say Y here |
| 723 | to use it. If you say Y here even though your machine doesn't have |
| 724 | an IO-APIC, then the kernel will still run with no slowdown at all. |
| 725 | |
| 726 | config X86_LOCAL_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 727 | def_bool y |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 728 | depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 729 | |
| 730 | config X86_IO_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 731 | def_bool y |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 732 | depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 733 | |
| 734 | config X86_VISWS_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 735 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 736 | depends on X86_32 && X86_VISWS |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 737 | |
Stefan Assmann | 41b9eb2 | 2008-07-15 13:48:55 +0200 | [diff] [blame] | 738 | config X86_REROUTE_FOR_BROKEN_BOOT_IRQS |
| 739 | bool "Reroute for broken boot IRQs" |
| 740 | default n |
| 741 | depends on X86_IO_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 742 | ---help--- |
Stefan Assmann | 41b9eb2 | 2008-07-15 13:48:55 +0200 | [diff] [blame] | 743 | This option enables a workaround that fixes a source of |
| 744 | spurious interrupts. This is recommended when threaded |
| 745 | interrupt handling is used on systems where the generation of |
| 746 | superfluous "boot interrupts" cannot be disabled. |
| 747 | |
| 748 | Some chipsets generate a legacy INTx "boot IRQ" when the IRQ |
| 749 | entry in the chipset's IO-APIC is masked (as, e.g. the RT |
| 750 | kernel does during interrupt handling). On chipsets where this |
| 751 | boot IRQ generation cannot be disabled, this workaround keeps |
| 752 | the original IRQ line masked so that only the equivalent "boot |
| 753 | IRQ" is delivered to the CPUs. The workaround also tells the |
| 754 | kernel to set up the IRQ handler on the boot IRQ line. In this |
| 755 | way only one interrupt is delivered to the kernel. Otherwise |
| 756 | the spurious second interrupt may cause the kernel to bring |
| 757 | down (vital) interrupt lines. |
| 758 | |
| 759 | Only affects "broken" chipsets. Interrupt sharing may be |
| 760 | increased on these systems. |
| 761 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 762 | config X86_MCE |
| 763 | bool "Machine Check Exception" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 764 | ---help--- |
| 765 | Machine Check Exception support allows the processor to notify the |
| 766 | kernel if it detects a problem (e.g. overheating, component failure). |
| 767 | The action the kernel takes depends on the severity of the problem, |
| 768 | ranging from a warning message on the console, to halting the machine. |
| 769 | Your processor must be a Pentium or newer to support this - check the |
| 770 | flags in /proc/cpuinfo for mce. Note that some older Pentium systems |
| 771 | have a design flaw which leads to false MCE events - hence MCE is |
| 772 | disabled on all P5 processors, unless explicitly enabled with "mce" |
| 773 | as a boot argument. Similarly, if MCE is built in and creates a |
| 774 | problem on some new non-standard machine, you can boot with "nomce" |
| 775 | to disable it. MCE support simply ignores non-MCE processors like |
| 776 | the 386 and 486, so nearly everyone can say Y here. |
| 777 | |
| 778 | config X86_MCE_INTEL |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 779 | def_bool y |
| 780 | prompt "Intel MCE features" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 781 | depends on X86_64 && X86_MCE && X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 782 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 783 | Additional support for intel specific MCE features such as |
| 784 | the thermal monitor. |
| 785 | |
| 786 | config X86_MCE_AMD |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 787 | def_bool y |
| 788 | prompt "AMD MCE features" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 789 | depends on X86_64 && X86_MCE && X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 790 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 791 | Additional support for AMD specific MCE features such as |
| 792 | the DRAM Error Threshold. |
| 793 | |
Andi Kleen | b276268 | 2009-02-12 13:49:31 +0100 | [diff] [blame] | 794 | config X86_MCE_THRESHOLD |
| 795 | depends on X86_MCE_AMD || X86_MCE_INTEL |
| 796 | bool |
| 797 | default y |
| 798 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 799 | config X86_MCE_NONFATAL |
| 800 | tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4" |
| 801 | depends on X86_32 && X86_MCE |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 802 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 803 | Enabling this feature starts a timer that triggers every 5 seconds which |
| 804 | will look at the machine check registers to see if anything happened. |
| 805 | Non-fatal problems automatically get corrected (but still logged). |
| 806 | Disable this if you don't want to see these messages. |
| 807 | Seeing the messages this option prints out may be indicative of dying |
| 808 | or out-of-spec (ie, overclocked) hardware. |
| 809 | This option only does something on certain CPUs. |
| 810 | (AMD Athlon/Duron and Intel Pentium 4) |
| 811 | |
| 812 | config X86_MCE_P4THERMAL |
| 813 | bool "check for P4 thermal throttling interrupt." |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 814 | depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 815 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 816 | Enabling this feature will cause a message to be printed when the P4 |
| 817 | enters thermal throttling. |
| 818 | |
| 819 | config VM86 |
| 820 | bool "Enable VM86 support" if EMBEDDED |
| 821 | default y |
| 822 | depends on X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 823 | ---help--- |
| 824 | This option is required by programs like DOSEMU to run 16-bit legacy |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 825 | code on X86 processors. It also may be needed by software like |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 826 | XFree86 to initialize some video cards via BIOS. Disabling this |
| 827 | option saves about 6k. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 828 | |
| 829 | config TOSHIBA |
| 830 | tristate "Toshiba Laptop support" |
| 831 | depends on X86_32 |
| 832 | ---help--- |
| 833 | This adds a driver to safely access the System Management Mode of |
| 834 | the CPU on Toshiba portables with a genuine Toshiba BIOS. It does |
| 835 | not work on models with a Phoenix BIOS. The System Management Mode |
| 836 | is used to set the BIOS and power saving options on Toshiba portables. |
| 837 | |
| 838 | For information on utilities to make use of this driver see the |
| 839 | Toshiba Linux utilities web site at: |
| 840 | <http://www.buzzard.org.uk/toshiba/>. |
| 841 | |
| 842 | Say Y if you intend to run this kernel on a Toshiba portable. |
| 843 | Say N otherwise. |
| 844 | |
| 845 | config I8K |
| 846 | tristate "Dell laptop support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 847 | ---help--- |
| 848 | This adds a driver to safely access the System Management Mode |
| 849 | of the CPU on the Dell Inspiron 8000. The System Management Mode |
| 850 | is used to read cpu temperature and cooling fan status and to |
| 851 | control the fans on the I8K portables. |
| 852 | |
| 853 | This driver has been tested only on the Inspiron 8000 but it may |
| 854 | also work with other Dell laptops. You can force loading on other |
| 855 | models by passing the parameter `force=1' to the module. Use at |
| 856 | your own risk. |
| 857 | |
| 858 | For information on utilities to make use of this driver see the |
| 859 | I8K Linux utilities web site at: |
| 860 | <http://people.debian.org/~dz/i8k/> |
| 861 | |
| 862 | Say Y if you intend to run this kernel on a Dell Inspiron 8000. |
| 863 | Say N otherwise. |
| 864 | |
| 865 | config X86_REBOOTFIXUPS |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 866 | bool "Enable X86 board specific fixups for reboot" |
| 867 | depends on X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 868 | ---help--- |
| 869 | This enables chipset and/or board specific fixups to be done |
| 870 | in order to get reboot to work correctly. This is only needed on |
| 871 | some combinations of hardware and BIOS. The symptom, for which |
| 872 | this config is intended, is when reboot ends with a stalled/hung |
| 873 | system. |
| 874 | |
| 875 | Currently, the only fixup is for the Geode machines using |
Florian Fainelli | 5e3a77e | 2008-01-30 13:33:36 +0100 | [diff] [blame] | 876 | CS5530A and CS5536 chipsets and the RDC R-321x SoC. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 877 | |
| 878 | Say Y if you want to enable the fixup. Currently, it's safe to |
| 879 | enable this option even if you don't need it. |
| 880 | Say N otherwise. |
| 881 | |
| 882 | config MICROCODE |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 883 | tristate "/dev/cpu/microcode - microcode support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 884 | select FW_LOADER |
| 885 | ---help--- |
| 886 | 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] | 887 | certain Intel and AMD processors. The Intel support is for the |
| 888 | IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, |
| 889 | Pentium 4, Xeon etc. The AMD support is for family 0x10 and |
| 890 | 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra. |
| 891 | You will obviously need the actual microcode binary data itself |
| 892 | which is not shipped with the Linux kernel. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 893 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 894 | This option selects the general module only, you need to select |
| 895 | at least one vendor specific module as well. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 896 | |
| 897 | To compile this driver as a module, choose M here: the |
| 898 | module will be called microcode. |
| 899 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 900 | config MICROCODE_INTEL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 901 | bool "Intel microcode patch loading support" |
| 902 | depends on MICROCODE |
| 903 | default MICROCODE |
| 904 | select FW_LOADER |
| 905 | ---help--- |
| 906 | This options enables microcode patch loading support for Intel |
| 907 | processors. |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 908 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 909 | For latest news and information on obtaining all the required |
| 910 | Intel ingredients for this driver, check: |
| 911 | <http://www.urbanmyth.org/microcode/>. |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 912 | |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 913 | config MICROCODE_AMD |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 914 | bool "AMD microcode patch loading support" |
| 915 | depends on MICROCODE |
| 916 | select FW_LOADER |
| 917 | ---help--- |
| 918 | If you select this option, microcode patch loading support for AMD |
| 919 | processors will be enabled. |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 920 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 921 | config MICROCODE_OLD_INTERFACE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 922 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 923 | depends on MICROCODE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 924 | |
| 925 | config X86_MSR |
| 926 | tristate "/dev/cpu/*/msr - Model-specific register support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 927 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 928 | This device gives privileged processes access to the x86 |
| 929 | Model-Specific Registers (MSRs). It is a character device with |
| 930 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. |
| 931 | MSR accesses are directed to a specific CPU on multi-processor |
| 932 | systems. |
| 933 | |
| 934 | config X86_CPUID |
| 935 | tristate "/dev/cpu/*/cpuid - CPU information support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 936 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 937 | This device gives processes access to the x86 CPUID instruction to |
| 938 | be executed on a specific processor. It is a character device |
| 939 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to |
| 940 | /dev/cpu/31/cpuid. |
| 941 | |
Jaswinder Singh Rajput | 9b779ed | 2009-03-10 15:37:51 +0530 | [diff] [blame] | 942 | config X86_CPU_DEBUG |
| 943 | tristate "/sys/kernel/debug/x86/cpu/* - CPU Debug support" |
| 944 | ---help--- |
| 945 | If you select this option, this will provide various x86 CPUs |
| 946 | information through debugfs. |
| 947 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 948 | choice |
| 949 | prompt "High Memory Support" |
| 950 | default HIGHMEM4G if !X86_NUMAQ |
| 951 | default HIGHMEM64G if X86_NUMAQ |
| 952 | depends on X86_32 |
| 953 | |
| 954 | config NOHIGHMEM |
| 955 | bool "off" |
| 956 | depends on !X86_NUMAQ |
| 957 | ---help--- |
| 958 | Linux can use up to 64 Gigabytes of physical memory on x86 systems. |
| 959 | However, the address space of 32-bit x86 processors is only 4 |
| 960 | Gigabytes large. That means that, if you have a large amount of |
| 961 | physical memory, not all of it can be "permanently mapped" by the |
| 962 | kernel. The physical memory that's not permanently mapped is called |
| 963 | "high memory". |
| 964 | |
| 965 | If you are compiling a kernel which will never run on a machine with |
| 966 | more than 1 Gigabyte total physical RAM, answer "off" here (default |
| 967 | choice and suitable for most users). This will result in a "3GB/1GB" |
| 968 | split: 3GB are mapped so that each process sees a 3GB virtual memory |
| 969 | space and the remaining part of the 4GB virtual memory space is used |
| 970 | by the kernel to permanently map as much physical memory as |
| 971 | possible. |
| 972 | |
| 973 | If the machine has between 1 and 4 Gigabytes physical RAM, then |
| 974 | answer "4GB" here. |
| 975 | |
| 976 | If more than 4 Gigabytes is used then answer "64GB" here. This |
| 977 | selection turns Intel PAE (Physical Address Extension) mode on. |
| 978 | PAE implements 3-level paging on IA32 processors. PAE is fully |
| 979 | supported by Linux, PAE mode is implemented on all recent Intel |
| 980 | processors (Pentium Pro and better). NOTE: If you say "64GB" here, |
| 981 | then the kernel will not boot on CPUs that don't support PAE! |
| 982 | |
| 983 | The actual amount of total physical memory will either be |
| 984 | auto detected or can be forced by using a kernel command line option |
| 985 | such as "mem=256M". (Try "man bootparam" or see the documentation of |
| 986 | your boot loader (lilo or loadlin) about how to pass options to the |
| 987 | kernel at boot time.) |
| 988 | |
| 989 | If unsure, say "off". |
| 990 | |
| 991 | config HIGHMEM4G |
| 992 | bool "4GB" |
| 993 | depends on !X86_NUMAQ |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 994 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 995 | Select this if you have a 32-bit processor and between 1 and 4 |
| 996 | gigabytes of physical RAM. |
| 997 | |
| 998 | config HIGHMEM64G |
| 999 | bool "64GB" |
| 1000 | depends on !M386 && !M486 |
| 1001 | select X86_PAE |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1002 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1003 | Select this if you have a 32-bit processor and more than 4 |
| 1004 | gigabytes of physical RAM. |
| 1005 | |
| 1006 | endchoice |
| 1007 | |
| 1008 | choice |
| 1009 | depends on EXPERIMENTAL |
| 1010 | prompt "Memory split" if EMBEDDED |
| 1011 | default VMSPLIT_3G |
| 1012 | depends on X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1013 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1014 | Select the desired split between kernel and user memory. |
| 1015 | |
| 1016 | If the address range available to the kernel is less than the |
| 1017 | physical memory installed, the remaining memory will be available |
| 1018 | as "high memory". Accessing high memory is a little more costly |
| 1019 | than low memory, as it needs to be mapped into the kernel first. |
| 1020 | Note that increasing the kernel address space limits the range |
| 1021 | available to user programs, making the address space there |
| 1022 | tighter. Selecting anything other than the default 3G/1G split |
| 1023 | will also likely make your kernel incompatible with binary-only |
| 1024 | kernel modules. |
| 1025 | |
| 1026 | If you are not absolutely sure what you are doing, leave this |
| 1027 | option alone! |
| 1028 | |
| 1029 | config VMSPLIT_3G |
| 1030 | bool "3G/1G user/kernel split" |
| 1031 | config VMSPLIT_3G_OPT |
| 1032 | depends on !X86_PAE |
| 1033 | bool "3G/1G user/kernel split (for full 1G low memory)" |
| 1034 | config VMSPLIT_2G |
| 1035 | bool "2G/2G user/kernel split" |
| 1036 | config VMSPLIT_2G_OPT |
| 1037 | depends on !X86_PAE |
| 1038 | bool "2G/2G user/kernel split (for full 2G low memory)" |
| 1039 | config VMSPLIT_1G |
| 1040 | bool "1G/3G user/kernel split" |
| 1041 | endchoice |
| 1042 | |
| 1043 | config PAGE_OFFSET |
| 1044 | hex |
| 1045 | default 0xB0000000 if VMSPLIT_3G_OPT |
| 1046 | default 0x80000000 if VMSPLIT_2G |
| 1047 | default 0x78000000 if VMSPLIT_2G_OPT |
| 1048 | default 0x40000000 if VMSPLIT_1G |
| 1049 | default 0xC0000000 |
| 1050 | depends on X86_32 |
| 1051 | |
| 1052 | config HIGHMEM |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1053 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1054 | depends on X86_32 && (HIGHMEM64G || HIGHMEM4G) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1055 | |
| 1056 | config X86_PAE |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1057 | bool "PAE (Physical Address Extension) Support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1058 | depends on X86_32 && !HIGHMEM4G |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1059 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1060 | PAE is required for NX support, and furthermore enables |
| 1061 | larger swapspace support for non-overcommit purposes. It |
| 1062 | has the cost of more pagetable lookup overhead, and also |
| 1063 | consumes more pagetable space per process. |
| 1064 | |
Jeremy Fitzhardinge | 600715d | 2008-09-11 01:31:45 -0700 | [diff] [blame] | 1065 | config ARCH_PHYS_ADDR_T_64BIT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1066 | def_bool X86_64 || X86_PAE |
Jeremy Fitzhardinge | 600715d | 2008-09-11 01:31:45 -0700 | [diff] [blame] | 1067 | |
Nick Piggin | 9e89981 | 2008-10-22 12:33:16 +0200 | [diff] [blame] | 1068 | config DIRECT_GBPAGES |
| 1069 | bool "Enable 1GB pages for kernel pagetables" if EMBEDDED |
| 1070 | default y |
| 1071 | depends on X86_64 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1072 | ---help--- |
Nick Piggin | 9e89981 | 2008-10-22 12:33:16 +0200 | [diff] [blame] | 1073 | Allow the kernel linear mapping to use 1GB pages on CPUs that |
| 1074 | support it. This can improve the kernel's performance a tiny bit by |
| 1075 | reducing TLB pressure. If in doubt, say "Y". |
| 1076 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1077 | # Common NUMA Features |
| 1078 | config NUMA |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1079 | bool "Numa Memory Allocation and Scheduler Support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1080 | depends on SMP |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 1081 | depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) |
Yinghai Lu | 0699eae | 2008-06-17 15:39:01 -0700 | [diff] [blame] | 1082 | default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1083 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1084 | Enable NUMA (Non Uniform Memory Access) support. |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1085 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1086 | The kernel will try to allocate memory used by a CPU on the |
| 1087 | local memory controller of the CPU and add some more |
| 1088 | NUMA awareness to the kernel. |
| 1089 | |
Ingo Molnar | c280ea5 | 2008-11-08 13:29:45 +0100 | [diff] [blame] | 1090 | For 64-bit this is recommended if the system is Intel Core i7 |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1091 | (or later), AMD Opteron, or EM64T NUMA. |
| 1092 | |
| 1093 | For 32-bit this is only needed on (rare) 32-bit-only platforms |
| 1094 | that support NUMA topologies, such as NUMAQ / Summit, or if you |
| 1095 | boot a 32-bit kernel on a 64-bit NUMA platform. |
| 1096 | |
| 1097 | Otherwise, you should say N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1098 | |
| 1099 | comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" |
| 1100 | depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) |
| 1101 | |
| 1102 | config K8_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1103 | def_bool y |
| 1104 | prompt "Old style AMD Opteron NUMA detection" |
| 1105 | depends on X86_64 && NUMA && PCI |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1106 | ---help--- |
| 1107 | Enable K8 NUMA node topology detection. You should say Y here if |
| 1108 | you have a multi processor AMD K8 system. This uses an old |
| 1109 | method to read the NUMA configuration directly from the builtin |
| 1110 | Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA |
| 1111 | instead, which also takes priority if both are compiled in. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1112 | |
| 1113 | config X86_64_ACPI_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1114 | def_bool y |
| 1115 | prompt "ACPI NUMA detection" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1116 | depends on X86_64 && NUMA && ACPI && PCI |
| 1117 | select ACPI_NUMA |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1118 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1119 | Enable ACPI SRAT based node topology detection. |
| 1120 | |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 1121 | # Some NUMA nodes have memory ranges that span |
| 1122 | # other nodes. Even though a pfn is valid and |
| 1123 | # between a node's start and end pfns, it may not |
| 1124 | # reside on that node. See memmap_init_zone() |
| 1125 | # for details. |
| 1126 | config NODES_SPAN_OTHER_NODES |
| 1127 | def_bool y |
| 1128 | depends on X86_64_ACPI_NUMA |
| 1129 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1130 | config NUMA_EMU |
| 1131 | bool "NUMA emulation" |
| 1132 | depends on X86_64 && NUMA |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1133 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1134 | Enable NUMA emulation. A flat machine will be split |
| 1135 | into virtual nodes when booted with "numa=fake=N", where N is the |
| 1136 | number of nodes. This is only useful for debugging. |
| 1137 | |
| 1138 | config NODES_SHIFT |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 1139 | int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
Jan Beulich | 46d50c9 | 2009-03-12 12:33:06 +0000 | [diff] [blame] | 1140 | range 1 9 |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 1141 | default "9" if MAXSMP |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1142 | default "6" if X86_64 |
| 1143 | default "4" if X86_NUMAQ |
| 1144 | default "3" |
| 1145 | depends on NEED_MULTIPLE_NODES |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1146 | ---help--- |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 1147 | Specify the maximum number of NUMA Nodes available on the target |
Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 1148 | system. Increases memory reserved to accommodate various tables. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1149 | |
Tejun Heo | c132937 | 2009-02-24 11:57:20 +0900 | [diff] [blame] | 1150 | config HAVE_ARCH_BOOTMEM |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1151 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1152 | depends on X86_32 && NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1153 | |
| 1154 | config ARCH_HAVE_MEMORY_PRESENT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1155 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1156 | depends on X86_32 && DISCONTIGMEM |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1157 | |
| 1158 | config NEED_NODE_MEMMAP_SIZE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1159 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1160 | depends on X86_32 && (DISCONTIGMEM || SPARSEMEM) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1161 | |
| 1162 | config HAVE_ARCH_ALLOC_REMAP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1163 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1164 | depends on X86_32 && NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1165 | |
| 1166 | config ARCH_FLATMEM_ENABLE |
| 1167 | def_bool y |
Jeff Chua | 9980996 | 2008-08-06 19:09:53 +0800 | [diff] [blame] | 1168 | depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1169 | |
| 1170 | config ARCH_DISCONTIGMEM_ENABLE |
| 1171 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1172 | depends on NUMA && X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1173 | |
| 1174 | config ARCH_DISCONTIGMEM_DEFAULT |
| 1175 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1176 | depends on NUMA && X86_32 |
| 1177 | |
| 1178 | config ARCH_SPARSEMEM_DEFAULT |
| 1179 | def_bool y |
| 1180 | depends on X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1181 | |
| 1182 | config ARCH_SPARSEMEM_ENABLE |
| 1183 | def_bool y |
Yinghai Lu | 4272ebf | 2009-01-29 15:14:46 -0800 | [diff] [blame] | 1184 | depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1185 | select SPARSEMEM_STATIC if X86_32 |
| 1186 | select SPARSEMEM_VMEMMAP_ENABLE if X86_64 |
| 1187 | |
| 1188 | config ARCH_SELECT_MEMORY_MODEL |
| 1189 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1190 | depends on ARCH_SPARSEMEM_ENABLE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1191 | |
| 1192 | config ARCH_MEMORY_PROBE |
| 1193 | def_bool X86_64 |
| 1194 | depends on MEMORY_HOTPLUG |
| 1195 | |
| 1196 | source "mm/Kconfig" |
| 1197 | |
| 1198 | config HIGHPTE |
| 1199 | bool "Allocate 3rd-level pagetables from highmem" |
| 1200 | depends on X86_32 && (HIGHMEM4G || HIGHMEM64G) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1201 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1202 | The VM uses one page table entry for each page of physical memory. |
| 1203 | For systems with a lot of RAM, this can be wasteful of precious |
| 1204 | low memory. Setting this option will put user-space page table |
| 1205 | entries in high memory. |
| 1206 | |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1207 | config X86_CHECK_BIOS_CORRUPTION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1208 | bool "Check for low memory corruption" |
| 1209 | ---help--- |
| 1210 | Periodically check for memory corruption in low memory, which |
| 1211 | is suspected to be caused by BIOS. Even when enabled in the |
| 1212 | configuration, it is disabled at runtime. Enable it by |
| 1213 | setting "memory_corruption_check=1" on the kernel command |
| 1214 | line. By default it scans the low 64k of memory every 60 |
| 1215 | seconds; see the memory_corruption_check_size and |
| 1216 | memory_corruption_check_period parameters in |
| 1217 | Documentation/kernel-parameters.txt to adjust this. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1218 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1219 | When enabled with the default parameters, this option has |
| 1220 | almost no overhead, as it reserves a relatively small amount |
| 1221 | of memory and scans it infrequently. It both detects corruption |
| 1222 | and prevents it from affecting the running system. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1223 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1224 | It is, however, intended as a diagnostic tool; if repeatable |
| 1225 | BIOS-originated corruption always affects the same memory, |
| 1226 | you can use memmap= to prevent the kernel from using that |
| 1227 | memory. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1228 | |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1229 | config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1230 | bool "Set the default setting of memory_corruption_check" |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1231 | depends on X86_CHECK_BIOS_CORRUPTION |
| 1232 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1233 | ---help--- |
| 1234 | Set whether the default state of memory_corruption_check is |
| 1235 | on or off. |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1236 | |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1237 | config X86_RESERVE_LOW_64K |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1238 | bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen" |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1239 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1240 | ---help--- |
| 1241 | Reserve the first 64K of physical RAM on BIOSes that are known |
| 1242 | to potentially corrupt that memory range. A numbers of BIOSes are |
| 1243 | known to utilize this area during suspend/resume, so it must not |
| 1244 | be used by the kernel. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1245 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1246 | Set this to N if you are absolutely sure that you trust the BIOS |
| 1247 | to get all its memory reservations and usages right. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1248 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1249 | If you have doubts about the BIOS (e.g. suspend/resume does not |
| 1250 | work or there's kernel crashes after certain hardware hotplug |
| 1251 | events) and it's not AMI or Phoenix, then you might want to enable |
| 1252 | X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical |
| 1253 | corruption patterns. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1254 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1255 | Say Y if unsure. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1256 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1257 | config MATH_EMULATION |
| 1258 | bool |
| 1259 | prompt "Math emulation" if X86_32 |
| 1260 | ---help--- |
| 1261 | Linux can emulate a math coprocessor (used for floating point |
| 1262 | operations) if you don't have one. 486DX and Pentium processors have |
| 1263 | a math coprocessor built in, 486SX and 386 do not, unless you added |
| 1264 | a 487DX or 387, respectively. (The messages during boot time can |
| 1265 | give you some hints here ["man dmesg"].) Everyone needs either a |
| 1266 | coprocessor or this emulation. |
| 1267 | |
| 1268 | If you don't have a math coprocessor, you need to say Y here; if you |
| 1269 | say Y here even though you have a coprocessor, the coprocessor will |
| 1270 | be used nevertheless. (This behavior can be changed with the kernel |
| 1271 | command line option "no387", which comes handy if your coprocessor |
| 1272 | is broken. Try "man bootparam" or see the documentation of your boot |
| 1273 | loader (lilo or loadlin) about how to pass options to the kernel at |
| 1274 | boot time.) This means that it is a good idea to say Y here if you |
| 1275 | intend to use this kernel on different machines. |
| 1276 | |
| 1277 | More information about the internals of the Linux math coprocessor |
| 1278 | emulation can be found in <file:arch/x86/math-emu/README>. |
| 1279 | |
| 1280 | If you are not sure, say Y; apart from resulting in a 66 KB bigger |
| 1281 | kernel, it won't hurt. |
| 1282 | |
| 1283 | config MTRR |
| 1284 | bool "MTRR (Memory Type Range Register) support" |
| 1285 | ---help--- |
| 1286 | On Intel P6 family processors (Pentium Pro, Pentium II and later) |
| 1287 | the Memory Type Range Registers (MTRRs) may be used to control |
| 1288 | processor access to memory ranges. This is most useful if you have |
| 1289 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining |
| 1290 | allows bus write transfers to be combined into a larger transfer |
| 1291 | before bursting over the PCI/AGP bus. This can increase performance |
| 1292 | of image write operations 2.5 times or more. Saying Y here creates a |
| 1293 | /proc/mtrr file which may be used to manipulate your processor's |
| 1294 | MTRRs. Typically the X server should use this. |
| 1295 | |
| 1296 | This code has a reasonably generic interface so that similar |
| 1297 | control registers on other processors can be easily supported |
| 1298 | as well: |
| 1299 | |
| 1300 | The Cyrix 6x86, 6x86MX and M II processors have Address Range |
| 1301 | Registers (ARRs) which provide a similar functionality to MTRRs. For |
| 1302 | these, the ARRs are used to emulate the MTRRs. |
| 1303 | The AMD K6-2 (stepping 8 and above) and K6-3 processors have two |
| 1304 | MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing |
| 1305 | write-combining. All of these processors are supported by this code |
| 1306 | and it makes sense to say Y here if you have one of them. |
| 1307 | |
| 1308 | Saying Y here also fixes a problem with buggy SMP BIOSes which only |
| 1309 | set the MTRRs for the boot CPU and not for the secondary CPUs. This |
| 1310 | can lead to all sorts of problems, so it's good to say Y here. |
| 1311 | |
| 1312 | You can safely say Y even if your machine doesn't have MTRRs, you'll |
| 1313 | just add about 9 KB to your kernel. |
| 1314 | |
Randy Dunlap | 7225e75 | 2008-07-26 17:54:22 -0700 | [diff] [blame] | 1315 | See <file:Documentation/x86/mtrr.txt> for more information. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1316 | |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1317 | config MTRR_SANITIZER |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1318 | def_bool y |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1319 | prompt "MTRR cleanup support" |
| 1320 | depends on MTRR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1321 | ---help--- |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1322 | Convert MTRR layout from continuous to discrete, so X drivers can |
| 1323 | add writeback entries. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1324 | |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1325 | Can be disabled with disable_mtrr_cleanup on the kernel command line. |
Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 1326 | The largest mtrr entry size for a continuous block can be set with |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1327 | mtrr_chunk_size. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1328 | |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1329 | If unsure, say Y. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1330 | |
| 1331 | config MTRR_SANITIZER_ENABLE_DEFAULT |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1332 | int "MTRR cleanup enable value (0-1)" |
| 1333 | range 0 1 |
| 1334 | default "0" |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1335 | depends on MTRR_SANITIZER |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1336 | ---help--- |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1337 | Enable mtrr cleanup default value |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1338 | |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1339 | config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT |
| 1340 | int "MTRR cleanup spare reg num (0-7)" |
| 1341 | range 0 7 |
| 1342 | default "1" |
| 1343 | depends on MTRR_SANITIZER |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1344 | ---help--- |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1345 | mtrr cleanup spare entries default, it can be changed via |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1346 | mtrr_spare_reg_nr=N on the kernel command line. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1347 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1348 | config X86_PAT |
Ingo Molnar | 2a8a271 | 2008-04-26 10:26:52 +0200 | [diff] [blame] | 1349 | bool |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1350 | prompt "x86 PAT support" |
Ingo Molnar | 2a8a271 | 2008-04-26 10:26:52 +0200 | [diff] [blame] | 1351 | depends on MTRR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1352 | ---help--- |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1353 | Use PAT attributes to setup page level cache control. |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1354 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1355 | PATs are the modern equivalents of MTRRs and are much more |
| 1356 | flexible than MTRRs. |
| 1357 | |
| 1358 | Say N here if you see bootup problems (boot crash, boot hang, |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1359 | spontaneous reboots) or a non-working video driver. |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1360 | |
| 1361 | If unsure, say Y. |
| 1362 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1363 | config EFI |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1364 | bool "EFI runtime service support" |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 1365 | depends on ACPI |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1366 | ---help--- |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1367 | This enables the kernel to use EFI runtime services that are |
| 1368 | available (such as the EFI variable services). |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1369 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1370 | This option is only useful on systems that have EFI firmware. |
| 1371 | In addition, you should use the latest ELILO loader available |
| 1372 | at <http://elilo.sourceforge.net> in order to take advantage |
| 1373 | of EFI runtime services. However, even with this option, the |
| 1374 | resultant kernel should continue to boot on existing non-EFI |
| 1375 | platforms. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1376 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1377 | config SECCOMP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1378 | def_bool y |
| 1379 | prompt "Enable seccomp to safely compute untrusted bytecode" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1380 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1381 | This kernel feature is useful for number crunching applications |
| 1382 | that may need to compute untrusted bytecode during their |
| 1383 | execution. By using pipes or other transports made available to |
| 1384 | the process as file descriptors supporting the read/write |
| 1385 | syscalls, it's possible to isolate those applications in |
| 1386 | their own address space using seccomp. Once seccomp is |
Alexey Dobriyan | 9c0bbee | 2008-09-09 11:01:31 +0400 | [diff] [blame] | 1387 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1388 | and the task is only allowed to execute a few safe syscalls |
| 1389 | defined by each seccomp mode. |
| 1390 | |
| 1391 | If unsure, say Y. Only embedded should say N here. |
| 1392 | |
Ingo Molnar | 113c541 | 2008-02-14 10:36:03 +0100 | [diff] [blame] | 1393 | config CC_STACKPROTECTOR_ALL |
| 1394 | bool |
| 1395 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1396 | config CC_STACKPROTECTOR |
| 1397 | bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" |
Ingo Molnar | 113c541 | 2008-02-14 10:36:03 +0100 | [diff] [blame] | 1398 | select CC_STACKPROTECTOR_ALL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1399 | ---help--- |
| 1400 | This option turns on the -fstack-protector GCC feature. This |
Ingo Molnar | 113c541 | 2008-02-14 10:36:03 +0100 | [diff] [blame] | 1401 | feature puts, at the beginning of functions, a canary value on |
| 1402 | the stack just before the return address, and validates |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1403 | the value just before actually returning. Stack based buffer |
| 1404 | overflows (that need to overwrite this return address) now also |
| 1405 | overwrite the canary, which gets detected and the attack is then |
| 1406 | neutralized via a kernel panic. |
| 1407 | |
| 1408 | This feature requires gcc version 4.2 or above, or a distribution |
| 1409 | gcc with the feature backported. Older versions are automatically |
Ingo Molnar | 113c541 | 2008-02-14 10:36:03 +0100 | [diff] [blame] | 1410 | detected and for those versions, this configuration option is |
| 1411 | ignored. (and a warning is printed during bootup) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1412 | |
| 1413 | source kernel/Kconfig.hz |
| 1414 | |
| 1415 | config KEXEC |
| 1416 | bool "kexec system call" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1417 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1418 | kexec is a system call that implements the ability to shutdown your |
| 1419 | current kernel, and to start another kernel. It is like a reboot |
| 1420 | but it is independent of the system firmware. And like a reboot |
| 1421 | you can start any kernel with it, not just Linux. |
| 1422 | |
| 1423 | The name comes from the similarity to the exec system call. |
| 1424 | |
| 1425 | It is an ongoing process to be certain the hardware in a machine |
| 1426 | is properly shutdown, so do not be surprised if this code does not |
| 1427 | initially work for you. It may help to enable device hotplugging |
| 1428 | support. As of this writing the exact hardware interface is |
| 1429 | strongly in flux, so no good recommendation can be made. |
| 1430 | |
| 1431 | config CRASH_DUMP |
Pavel Machek | 04b6944 | 2008-08-14 17:16:50 +0200 | [diff] [blame] | 1432 | bool "kernel crash dumps" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1433 | depends on X86_64 || (X86_32 && HIGHMEM) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1434 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1435 | Generate crash dump after being started by kexec. |
| 1436 | This should be normally only set in special crash dump kernels |
| 1437 | which are loaded in the main kernel with kexec-tools into |
| 1438 | a specially reserved region and then later executed after |
| 1439 | a crash by kdump/kexec. The crash dump kernel must be compiled |
| 1440 | to a memory address not used by the main kernel or BIOS using |
| 1441 | PHYSICAL_START, or it must be built as a relocatable image |
| 1442 | (CONFIG_RELOCATABLE=y). |
| 1443 | For more details see Documentation/kdump/kdump.txt |
| 1444 | |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1445 | config KEXEC_JUMP |
| 1446 | bool "kexec jump (EXPERIMENTAL)" |
| 1447 | depends on EXPERIMENTAL |
Huang Ying | fee7b0d | 2009-03-10 10:57:16 +0800 | [diff] [blame] | 1448 | depends on KEXEC && HIBERNATION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1449 | ---help--- |
Huang Ying | 89081d1 | 2008-07-25 19:45:10 -0700 | [diff] [blame] | 1450 | Jump between original kernel and kexeced kernel and invoke |
| 1451 | code in physical address mode via KEXEC |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1452 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1453 | config PHYSICAL_START |
| 1454 | hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) |
| 1455 | default "0x1000000" if X86_NUMAQ |
| 1456 | default "0x200000" if X86_64 |
| 1457 | default "0x100000" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1458 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1459 | This gives the physical address where the kernel is loaded. |
| 1460 | |
| 1461 | If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then |
| 1462 | bzImage will decompress itself to above physical address and |
| 1463 | run from there. Otherwise, bzImage will run from the address where |
| 1464 | it has been loaded by the boot loader and will ignore above physical |
| 1465 | address. |
| 1466 | |
| 1467 | In normal kdump cases one does not have to set/change this option |
| 1468 | as now bzImage can be compiled as a completely relocatable image |
| 1469 | (CONFIG_RELOCATABLE=y) and be used to load and run from a different |
| 1470 | address. This option is mainly useful for the folks who don't want |
| 1471 | to use a bzImage for capturing the crash dump and want to use a |
| 1472 | vmlinux instead. vmlinux is not relocatable hence a kernel needs |
| 1473 | to be specifically compiled to run from a specific memory area |
| 1474 | (normally a reserved region) and this option comes handy. |
| 1475 | |
| 1476 | So if you are using bzImage for capturing the crash dump, leave |
| 1477 | the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y. |
| 1478 | Otherwise if you plan to use vmlinux for capturing the crash dump |
| 1479 | change this value to start of the reserved region (Typically 16MB |
| 1480 | 0x1000000). In other words, it can be set based on the "X" value as |
| 1481 | specified in the "crashkernel=YM@XM" command line boot parameter |
| 1482 | passed to the panic-ed kernel. Typically this parameter is set as |
| 1483 | crashkernel=64M@16M. Please take a look at |
| 1484 | Documentation/kdump/kdump.txt for more details about crash dumps. |
| 1485 | |
| 1486 | Usage of bzImage for capturing the crash dump is recommended as |
| 1487 | one does not have to build two kernels. Same kernel can be used |
| 1488 | as production kernel and capture kernel. Above option should have |
| 1489 | gone away after relocatable bzImage support is introduced. But it |
| 1490 | is present because there are users out there who continue to use |
| 1491 | vmlinux for dump capture. This option should go away down the |
| 1492 | line. |
| 1493 | |
| 1494 | Don't change this unless you know what you are doing. |
| 1495 | |
| 1496 | config RELOCATABLE |
| 1497 | bool "Build a relocatable kernel (EXPERIMENTAL)" |
| 1498 | depends on EXPERIMENTAL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1499 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1500 | This builds a kernel image that retains relocation information |
| 1501 | so it can be loaded someplace besides the default 1MB. |
| 1502 | The relocations tend to make the kernel binary about 10% larger, |
| 1503 | but are discarded at runtime. |
| 1504 | |
| 1505 | One use is for the kexec on panic case where the recovery kernel |
| 1506 | must live at a different physical address than the primary |
| 1507 | kernel. |
| 1508 | |
| 1509 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 1510 | it has been loaded at and the compile time physical address |
| 1511 | (CONFIG_PHYSICAL_START) is ignored. |
| 1512 | |
| 1513 | config PHYSICAL_ALIGN |
| 1514 | hex |
| 1515 | prompt "Alignment value to which kernel should be aligned" if X86_32 |
| 1516 | default "0x100000" if X86_32 |
| 1517 | default "0x200000" if X86_64 |
| 1518 | range 0x2000 0x400000 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1519 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1520 | This value puts the alignment restrictions on physical address |
| 1521 | where kernel is loaded and run from. Kernel is compiled for an |
| 1522 | address which meets above alignment restriction. |
| 1523 | |
| 1524 | If bootloader loads the kernel at a non-aligned address and |
| 1525 | CONFIG_RELOCATABLE is set, kernel will move itself to nearest |
| 1526 | address aligned to above value and run from there. |
| 1527 | |
| 1528 | If bootloader loads the kernel at a non-aligned address and |
| 1529 | CONFIG_RELOCATABLE is not set, kernel will ignore the run time |
| 1530 | load address and decompress itself to the address it has been |
| 1531 | compiled for and run from there. The address for which kernel is |
| 1532 | compiled already meets above alignment restrictions. Hence the |
| 1533 | end result is that kernel runs from a physical address meeting |
| 1534 | above alignment restrictions. |
| 1535 | |
| 1536 | Don't change this unless you know what you are doing. |
| 1537 | |
| 1538 | config HOTPLUG_CPU |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1539 | bool "Support for hot-pluggable CPUs" |
Ingo Molnar | 4b19ed91 | 2009-01-27 17:47:24 +0100 | [diff] [blame] | 1540 | depends on SMP && HOTPLUG |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1541 | ---help--- |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1542 | Say Y here to allow turning CPUs off and on. CPUs can be |
| 1543 | controlled through /sys/devices/system/cpu. |
| 1544 | ( Note: power management support will enable this option |
| 1545 | automatically on SMP systems. ) |
| 1546 | Say N if you want to disable CPU hotplug. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1547 | |
| 1548 | config COMPAT_VDSO |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1549 | def_bool y |
| 1550 | prompt "Compat VDSO support" |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 1551 | depends on X86_32 || IA32_EMULATION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1552 | ---help--- |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 1553 | Map the 32-bit VDSO to the predictable old-style address too. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1554 | ---help--- |
| 1555 | Say N here if you are running a sufficiently recent glibc |
| 1556 | version (2.3.3 or later), to remove the high-mapped |
| 1557 | VDSO mapping and to exclusively use the randomized VDSO. |
| 1558 | |
| 1559 | If unsure, say Y. |
| 1560 | |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 1561 | config CMDLINE_BOOL |
| 1562 | bool "Built-in kernel command line" |
| 1563 | default n |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1564 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 1565 | Allow for specifying boot arguments to the kernel at |
| 1566 | build time. On some systems (e.g. embedded ones), it is |
| 1567 | necessary or convenient to provide some or all of the |
| 1568 | kernel boot arguments with the kernel itself (that is, |
| 1569 | to not rely on the boot loader to provide them.) |
| 1570 | |
| 1571 | To compile command line arguments into the kernel, |
| 1572 | set this option to 'Y', then fill in the |
| 1573 | the boot arguments in CONFIG_CMDLINE. |
| 1574 | |
| 1575 | Systems with fully functional boot loaders (i.e. non-embedded) |
| 1576 | should leave this option set to 'N'. |
| 1577 | |
| 1578 | config CMDLINE |
| 1579 | string "Built-in kernel command string" |
| 1580 | depends on CMDLINE_BOOL |
| 1581 | default "" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1582 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 1583 | Enter arguments here that should be compiled into the kernel |
| 1584 | image and used at boot time. If the boot loader provides a |
| 1585 | command line at boot time, it is appended to this string to |
| 1586 | form the full kernel command line, when the system boots. |
| 1587 | |
| 1588 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to |
| 1589 | change this behavior. |
| 1590 | |
| 1591 | In most cases, the command line (whether built-in or provided |
| 1592 | by the boot loader) should specify the device for the root |
| 1593 | file system. |
| 1594 | |
| 1595 | config CMDLINE_OVERRIDE |
| 1596 | bool "Built-in command line overrides boot loader arguments" |
| 1597 | default n |
| 1598 | depends on CMDLINE_BOOL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1599 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 1600 | Set this option to 'Y' to have the kernel ignore the boot loader |
| 1601 | command line, and use ONLY the built-in command line. |
| 1602 | |
| 1603 | This is used to work around broken boot loaders. This should |
| 1604 | be set to 'N' under normal conditions. |
| 1605 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1606 | endmenu |
| 1607 | |
| 1608 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 1609 | def_bool y |
| 1610 | depends on X86_64 || (X86_32 && HIGHMEM) |
| 1611 | |
Gary Hade | 3555105 | 2008-10-31 10:52:03 -0700 | [diff] [blame] | 1612 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 1613 | def_bool y |
| 1614 | depends on MEMORY_HOTPLUG |
| 1615 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1616 | config HAVE_ARCH_EARLY_PFN_TO_NID |
| 1617 | def_bool X86_64 |
| 1618 | depends on NUMA |
| 1619 | |
Bjorn Helgaas | da85f86 | 2008-11-05 13:37:27 -0600 | [diff] [blame] | 1620 | menu "Power management and ACPI options" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1621 | |
| 1622 | config ARCH_HIBERNATION_HEADER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1623 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1624 | depends on X86_64 && HIBERNATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1625 | |
| 1626 | source "kernel/power/Kconfig" |
| 1627 | |
| 1628 | source "drivers/acpi/Kconfig" |
| 1629 | |
Andi Kleen | a6b6807 | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 1630 | config X86_APM_BOOT |
| 1631 | bool |
| 1632 | default y |
| 1633 | depends on APM || APM_MODULE |
| 1634 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1635 | menuconfig APM |
| 1636 | tristate "APM (Advanced Power Management) BIOS support" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1637 | depends on X86_32 && PM_SLEEP |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1638 | ---help--- |
| 1639 | APM is a BIOS specification for saving power using several different |
| 1640 | techniques. This is mostly useful for battery powered laptops with |
| 1641 | APM compliant BIOSes. If you say Y here, the system time will be |
| 1642 | reset after a RESUME operation, the /proc/apm device will provide |
| 1643 | battery status information, and user-space programs will receive |
| 1644 | notification of APM "events" (e.g. battery status change). |
| 1645 | |
| 1646 | If you select "Y" here, you can disable actual use of the APM |
| 1647 | BIOS by passing the "apm=off" option to the kernel at boot time. |
| 1648 | |
| 1649 | Note that the APM support is almost completely disabled for |
| 1650 | machines with more than one CPU. |
| 1651 | |
| 1652 | In order to use APM, you will need supporting software. For location |
Randy Dunlap | 5347112 | 2008-03-12 18:10:51 -0400 | [diff] [blame] | 1653 | and more information, read <file:Documentation/power/pm.txt> and the |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1654 | Battery Powered Linux mini-HOWTO, available from |
| 1655 | <http://www.tldp.org/docs.html#howto>. |
| 1656 | |
| 1657 | This driver does not spin down disk drives (see the hdparm(8) |
| 1658 | manpage ("man 8 hdparm") for that), and it doesn't turn off |
| 1659 | VESA-compliant "green" monitors. |
| 1660 | |
| 1661 | This driver does not support the TI 4000M TravelMate and the ACER |
| 1662 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" |
| 1663 | desktop machines also don't have compliant BIOSes, and this driver |
| 1664 | may cause those machines to panic during the boot phase. |
| 1665 | |
| 1666 | Generally, if you don't have a battery in your machine, there isn't |
| 1667 | much point in using this driver and you should say N. If you get |
| 1668 | random kernel OOPSes or reboots that don't seem to be related to |
| 1669 | anything, try disabling/enabling this option (or disabling/enabling |
| 1670 | APM in your BIOS). |
| 1671 | |
| 1672 | Some other things you should try when experiencing seemingly random, |
| 1673 | "weird" problems: |
| 1674 | |
| 1675 | 1) make sure that you have enough swap space and that it is |
| 1676 | enabled. |
| 1677 | 2) pass the "no-hlt" option to the kernel |
| 1678 | 3) switch on floating point emulation in the kernel and pass |
| 1679 | the "no387" option to the kernel |
| 1680 | 4) pass the "floppy=nodma" option to the kernel |
| 1681 | 5) pass the "mem=4M" option to the kernel (thereby disabling |
| 1682 | all but the first 4 MB of RAM) |
| 1683 | 6) make sure that the CPU is not over clocked. |
| 1684 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> |
| 1685 | 8) disable the cache from your BIOS settings |
| 1686 | 9) install a fan for the video card or exchange video RAM |
| 1687 | 10) install a better fan for the CPU |
| 1688 | 11) exchange RAM chips |
| 1689 | 12) exchange the motherboard. |
| 1690 | |
| 1691 | To compile this driver as a module, choose M here: the |
| 1692 | module will be called apm. |
| 1693 | |
| 1694 | if APM |
| 1695 | |
| 1696 | config APM_IGNORE_USER_SUSPEND |
| 1697 | bool "Ignore USER SUSPEND" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1698 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1699 | This option will ignore USER SUSPEND requests. On machines with a |
| 1700 | compliant APM BIOS, you want to say N. However, on the NEC Versa M |
| 1701 | series notebooks, it is necessary to say Y because of a BIOS bug. |
| 1702 | |
| 1703 | config APM_DO_ENABLE |
| 1704 | bool "Enable PM at boot time" |
| 1705 | ---help--- |
| 1706 | Enable APM features at boot time. From page 36 of the APM BIOS |
| 1707 | specification: "When disabled, the APM BIOS does not automatically |
| 1708 | power manage devices, enter the Standby State, enter the Suspend |
| 1709 | State, or take power saving steps in response to CPU Idle calls." |
| 1710 | This driver will make CPU Idle calls when Linux is idle (unless this |
| 1711 | feature is turned off -- see "Do CPU IDLE calls", below). This |
| 1712 | should always save battery power, but more complicated APM features |
| 1713 | will be dependent on your BIOS implementation. You may need to turn |
| 1714 | this option off if your computer hangs at boot time when using APM |
| 1715 | support, or if it beeps continuously instead of suspending. Turn |
| 1716 | this off if you have a NEC UltraLite Versa 33/C or a Toshiba |
| 1717 | T400CDT. This is off by default since most machines do fine without |
| 1718 | this feature. |
| 1719 | |
| 1720 | config APM_CPU_IDLE |
| 1721 | bool "Make CPU Idle calls when idle" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1722 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1723 | Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. |
| 1724 | On some machines, this can activate improved power savings, such as |
| 1725 | a slowed CPU clock rate, when the machine is idle. These idle calls |
| 1726 | are made after the idle loop has run for some length of time (e.g., |
| 1727 | 333 mS). On some machines, this will cause a hang at boot time or |
| 1728 | whenever the CPU becomes idle. (On machines with more than one CPU, |
| 1729 | this option does nothing.) |
| 1730 | |
| 1731 | config APM_DISPLAY_BLANK |
| 1732 | bool "Enable console blanking using APM" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1733 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1734 | Enable console blanking using the APM. Some laptops can use this to |
| 1735 | turn off the LCD backlight when the screen blanker of the Linux |
| 1736 | virtual console blanks the screen. Note that this is only used by |
| 1737 | the virtual console screen blanker, and won't turn off the backlight |
| 1738 | when using the X Window system. This also doesn't have anything to |
| 1739 | do with your VESA-compliant power-saving monitor. Further, this |
| 1740 | option doesn't work for all laptops -- it might not turn off your |
| 1741 | backlight at all, or it might print a lot of errors to the console, |
| 1742 | especially if you are using gpm. |
| 1743 | |
| 1744 | config APM_ALLOW_INTS |
| 1745 | bool "Allow interrupts during APM BIOS calls" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1746 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1747 | Normally we disable external interrupts while we are making calls to |
| 1748 | the APM BIOS as a measure to lessen the effects of a badly behaving |
| 1749 | BIOS implementation. The BIOS should reenable interrupts if it |
| 1750 | needs to. Unfortunately, some BIOSes do not -- especially those in |
| 1751 | many of the newer IBM Thinkpads. If you experience hangs when you |
| 1752 | suspend, try setting this to Y. Otherwise, say N. |
| 1753 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1754 | endif # APM |
| 1755 | |
| 1756 | source "arch/x86/kernel/cpu/cpufreq/Kconfig" |
| 1757 | |
| 1758 | source "drivers/cpuidle/Kconfig" |
| 1759 | |
Andy Henroid | 27471fd | 2008-10-09 11:45:22 -0700 | [diff] [blame] | 1760 | source "drivers/idle/Kconfig" |
| 1761 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1762 | endmenu |
| 1763 | |
| 1764 | |
| 1765 | menu "Bus options (PCI etc.)" |
| 1766 | |
| 1767 | config PCI |
Ingo Molnar | 1ac9701 | 2008-05-19 14:10:14 +0200 | [diff] [blame] | 1768 | bool "PCI support" |
Adrian Bunk | 1c85808 | 2008-01-30 13:32:32 +0100 | [diff] [blame] | 1769 | default y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1770 | select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1771 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1772 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 1773 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 1774 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 1775 | VESA. If you have PCI, say Y, otherwise N. |
| 1776 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1777 | choice |
| 1778 | prompt "PCI access mode" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1779 | depends on X86_32 && PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1780 | default PCI_GOANY |
| 1781 | ---help--- |
| 1782 | On PCI systems, the BIOS can be used to detect the PCI devices and |
| 1783 | determine their configuration. However, some old PCI motherboards |
| 1784 | have BIOS bugs and may crash if this is done. Also, some embedded |
| 1785 | PCI-based systems don't have any BIOS at all. Linux can also try to |
| 1786 | detect the PCI hardware directly without using the BIOS. |
| 1787 | |
| 1788 | With this option, you can specify how Linux should detect the |
| 1789 | PCI devices. If you choose "BIOS", the BIOS will be used, |
| 1790 | if you choose "Direct", the BIOS won't be used, and if you |
| 1791 | choose "MMConfig", then PCI Express MMCONFIG will be used. |
| 1792 | If you choose "Any", the kernel will try MMCONFIG, then the |
| 1793 | direct access method and falls back to the BIOS if that doesn't |
| 1794 | work. If unsure, go with the default, which is "Any". |
| 1795 | |
| 1796 | config PCI_GOBIOS |
| 1797 | bool "BIOS" |
| 1798 | |
| 1799 | config PCI_GOMMCONFIG |
| 1800 | bool "MMConfig" |
| 1801 | |
| 1802 | config PCI_GODIRECT |
| 1803 | bool "Direct" |
| 1804 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1805 | config PCI_GOOLPC |
| 1806 | bool "OLPC" |
| 1807 | depends on OLPC |
| 1808 | |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 1809 | config PCI_GOANY |
| 1810 | bool "Any" |
| 1811 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1812 | endchoice |
| 1813 | |
| 1814 | config PCI_BIOS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1815 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1816 | depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1817 | |
| 1818 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. |
| 1819 | config PCI_DIRECT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1820 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 1821 | depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC)) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1822 | |
| 1823 | config PCI_MMCONFIG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1824 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1825 | depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1826 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1827 | config PCI_OLPC |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 1828 | def_bool y |
| 1829 | depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY) |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1830 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1831 | config PCI_DOMAINS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1832 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1833 | depends on PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1834 | |
| 1835 | config PCI_MMCONFIG |
| 1836 | bool "Support mmconfig PCI config space access" |
| 1837 | depends on X86_64 && PCI && ACPI |
| 1838 | |
| 1839 | config DMAR |
| 1840 | bool "Support for DMA Remapping Devices (EXPERIMENTAL)" |
David Woodhouse | 4cf2e75 | 2009-02-11 17:23:43 +0000 | [diff] [blame] | 1841 | depends on PCI_MSI && ACPI && EXPERIMENTAL |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1842 | help |
| 1843 | DMA remapping (DMAR) devices support enables independent address |
| 1844 | translations for Direct Memory Access (DMA) from devices. |
| 1845 | These DMA remapping devices are reported via ACPI tables |
| 1846 | and include PCI device scope covered by these DMA |
| 1847 | remapping devices. |
| 1848 | |
Kyle McMartin | 0cd5c3c | 2009-02-04 14:29:19 -0800 | [diff] [blame] | 1849 | config DMAR_DEFAULT_ON |
Kyle McMartin | f6be37f | 2009-02-26 12:57:56 -0500 | [diff] [blame] | 1850 | def_bool y |
Kyle McMartin | 0cd5c3c | 2009-02-04 14:29:19 -0800 | [diff] [blame] | 1851 | prompt "Enable DMA Remapping Devices by default" |
| 1852 | depends on DMAR |
| 1853 | help |
| 1854 | Selecting this option will enable a DMAR device at boot time if |
| 1855 | one is found. If this option is not selected, DMAR support can |
| 1856 | be enabled by passing intel_iommu=on to the kernel. It is |
| 1857 | recommended you say N here while the DMAR code remains |
| 1858 | experimental. |
| 1859 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1860 | config DMAR_GFX_WA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1861 | def_bool y |
| 1862 | prompt "Support for Graphics workaround" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1863 | depends on DMAR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1864 | ---help--- |
| 1865 | Current Graphics drivers tend to use physical address |
| 1866 | for DMA and avoid using DMA APIs. Setting this config |
| 1867 | option permits the IOMMU driver to set a unity map for |
| 1868 | all the OS-visible memory. Hence the driver can continue |
| 1869 | to use physical addresses for DMA. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1870 | |
| 1871 | config DMAR_FLOPPY_WA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1872 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1873 | depends on DMAR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1874 | ---help--- |
| 1875 | Floppy disk drivers are know to bypass DMA API calls |
| 1876 | thereby failing to work when IOMMU is enabled. This |
| 1877 | workaround will setup a 1:1 mapping for the first |
| 1878 | 16M to make floppy (an ISA device) work. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1879 | |
Suresh Siddha | 9fa8c48 | 2008-07-10 11:17:00 -0700 | [diff] [blame] | 1880 | config INTR_REMAP |
| 1881 | bool "Support for Interrupt Remapping (EXPERIMENTAL)" |
| 1882 | depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1883 | ---help--- |
| 1884 | Supports Interrupt remapping for IO-APIC and MSI devices. |
| 1885 | To use x2apic mode in the CPU's which support x2APIC enhancements or |
| 1886 | to support platforms with CPU's having > 8 bit APIC ID, say Y. |
Suresh Siddha | 9fa8c48 | 2008-07-10 11:17:00 -0700 | [diff] [blame] | 1887 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1888 | source "drivers/pci/pcie/Kconfig" |
| 1889 | |
| 1890 | source "drivers/pci/Kconfig" |
| 1891 | |
| 1892 | # x86_64 have no ISA slots, but do have ISA-style DMA. |
| 1893 | config ISA_DMA_API |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1894 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1895 | |
| 1896 | if X86_32 |
| 1897 | |
| 1898 | config ISA |
| 1899 | bool "ISA support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1900 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1901 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 1902 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 1903 | inside your box. Other bus systems are PCI, EISA, MicroChannel |
| 1904 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; |
| 1905 | newer boards don't support it. If you have ISA, say Y, otherwise N. |
| 1906 | |
| 1907 | config EISA |
| 1908 | bool "EISA support" |
| 1909 | depends on ISA |
| 1910 | ---help--- |
| 1911 | The Extended Industry Standard Architecture (EISA) bus was |
| 1912 | developed as an open alternative to the IBM MicroChannel bus. |
| 1913 | |
| 1914 | The EISA bus provided some of the features of the IBM MicroChannel |
| 1915 | bus while maintaining backward compatibility with cards made for |
| 1916 | the older ISA bus. The EISA bus saw limited use between 1988 and |
| 1917 | 1995 when it was made obsolete by the PCI bus. |
| 1918 | |
| 1919 | Say Y here if you are building a kernel for an EISA-based machine. |
| 1920 | |
| 1921 | Otherwise, say N. |
| 1922 | |
| 1923 | source "drivers/eisa/Kconfig" |
| 1924 | |
| 1925 | config MCA |
Ingo Molnar | 72ee6eb | 2009-01-27 16:57:49 +0100 | [diff] [blame] | 1926 | bool "MCA support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1927 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1928 | MicroChannel Architecture is found in some IBM PS/2 machines and |
| 1929 | laptops. It is a bus system similar to PCI or ISA. See |
| 1930 | <file:Documentation/mca.txt> (and especially the web page given |
| 1931 | there) before attempting to build an MCA bus kernel. |
| 1932 | |
| 1933 | source "drivers/mca/Kconfig" |
| 1934 | |
| 1935 | config SCx200 |
| 1936 | tristate "NatSemi SCx200 support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1937 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1938 | This provides basic support for National Semiconductor's |
| 1939 | (now AMD's) Geode processors. The driver probes for the |
| 1940 | PCI-IDs of several on-chip devices, so its a good dependency |
| 1941 | for other scx200_* drivers. |
| 1942 | |
| 1943 | If compiled as a module, the driver is named scx200. |
| 1944 | |
| 1945 | config SCx200HR_TIMER |
| 1946 | tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" |
| 1947 | depends on SCx200 && GENERIC_TIME |
| 1948 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1949 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1950 | This driver provides a clocksource built upon the on-chip |
| 1951 | 27MHz high-resolution timer. Its also a workaround for |
| 1952 | NSC Geode SC-1100's buggy TSC, which loses time when the |
| 1953 | processor goes idle (as is done by the scheduler). The |
| 1954 | other workaround is idle=poll boot option. |
| 1955 | |
| 1956 | config GEODE_MFGPT_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1957 | def_bool y |
| 1958 | prompt "Geode Multi-Function General Purpose Timer (MFGPT) events" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1959 | depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1960 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1961 | This driver provides a clock event source based on the MFGPT |
| 1962 | timer(s) in the CS5535 and CS5536 companion chip for the geode. |
| 1963 | MFGPTs have a better resolution and max interval than the |
| 1964 | generic PIT, and are suitable for use as high-res timers. |
| 1965 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1966 | config OLPC |
| 1967 | bool "One Laptop Per Child support" |
| 1968 | default n |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1969 | ---help--- |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 1970 | Add support for detecting the unique features of the OLPC |
| 1971 | XO hardware. |
| 1972 | |
Sam Ravnborg | bc0120f | 2007-11-06 23:10:39 +0100 | [diff] [blame] | 1973 | endif # X86_32 |
| 1974 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1975 | config K8_NB |
| 1976 | def_bool y |
Sam Ravnborg | bc0120f | 2007-11-06 23:10:39 +0100 | [diff] [blame] | 1977 | depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA))) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1978 | |
| 1979 | source "drivers/pcmcia/Kconfig" |
| 1980 | |
| 1981 | source "drivers/pci/hotplug/Kconfig" |
| 1982 | |
| 1983 | endmenu |
| 1984 | |
| 1985 | |
| 1986 | menu "Executable file formats / Emulations" |
| 1987 | |
| 1988 | source "fs/Kconfig.binfmt" |
| 1989 | |
| 1990 | config IA32_EMULATION |
| 1991 | bool "IA32 Emulation" |
| 1992 | depends on X86_64 |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 1993 | select COMPAT_BINFMT_ELF |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1994 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 1995 | Include code to run 32-bit programs under a 64-bit kernel. You should |
| 1996 | likely turn this on, unless you're 100% sure that you don't have any |
| 1997 | 32-bit programs left. |
| 1998 | |
| 1999 | config IA32_AOUT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2000 | tristate "IA32 a.out support" |
| 2001 | depends on IA32_EMULATION |
| 2002 | ---help--- |
| 2003 | Support old a.out binaries in the 32bit emulation. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2004 | |
| 2005 | config COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2006 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2007 | depends on IA32_EMULATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2008 | |
| 2009 | config COMPAT_FOR_U64_ALIGNMENT |
| 2010 | def_bool COMPAT |
| 2011 | depends on X86_64 |
| 2012 | |
| 2013 | config SYSVIPC_COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2014 | def_bool y |
Alexey Dobriyan | b899219 | 2008-09-14 13:44:41 +0400 | [diff] [blame] | 2015 | depends on COMPAT && SYSVIPC |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2016 | |
| 2017 | endmenu |
| 2018 | |
| 2019 | |
Keith Packard | e5beae1 | 2008-11-03 18:21:45 +0100 | [diff] [blame] | 2020 | config HAVE_ATOMIC_IOMAP |
| 2021 | def_bool y |
| 2022 | depends on X86_32 |
| 2023 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2024 | source "net/Kconfig" |
| 2025 | |
| 2026 | source "drivers/Kconfig" |
| 2027 | |
| 2028 | source "drivers/firmware/Kconfig" |
| 2029 | |
| 2030 | source "fs/Kconfig" |
| 2031 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2032 | source "arch/x86/Kconfig.debug" |
| 2033 | |
| 2034 | source "security/Kconfig" |
| 2035 | |
| 2036 | source "crypto/Kconfig" |
| 2037 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 2038 | source "arch/x86/kvm/Kconfig" |
| 2039 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2040 | source "lib/Kconfig" |