1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # Copyright (C) 2004, 2007-2010, 2011-2012 Syn !! 2 # For a description of the syntax of this configuration file,
>> 3 # see Documentation/kbuild/kconfig-language.txt.
4 # 4 #
5 5
6 config ARC !! 6 mainmenu "Linux Kernel Configuration"
7 def_bool y <<
8 select ARC_TIMERS <<
9 select ARCH_HAS_CACHE_LINE_SIZE <<
10 select ARCH_HAS_DEBUG_VM_PGTABLE <<
11 select ARCH_HAS_DMA_PREP_COHERENT <<
12 select ARCH_HAS_PTE_SPECIAL <<
13 select ARCH_HAS_SETUP_DMA_OPS <<
14 select ARCH_HAS_SYNC_DMA_FOR_CPU <<
15 select ARCH_HAS_SYNC_DMA_FOR_DEVICE <<
16 select ARCH_NEED_CMPXCHG_1_EMU <<
17 select ARCH_SUPPORTS_ATOMIC_RMW if ARC <<
18 select ARCH_32BIT_OFF_T <<
19 select BUILDTIME_TABLE_SORT <<
20 select CLONE_BACKWARDS <<
21 select COMMON_CLK <<
22 select DMA_DIRECT_REMAP <<
23 select GENERIC_ATOMIC64 if !ISA_ARCV2 <<
24 # for now, we don't need GENERIC_IRQ_P <<
25 select GENERIC_IRQ_SHOW <<
26 select GENERIC_PCI_IOMAP <<
27 select GENERIC_PENDING_IRQ if SMP <<
28 select GENERIC_SCHED_CLOCK <<
29 select GENERIC_SMP_IDLE_THREAD <<
30 select GENERIC_IOREMAP <<
31 select GENERIC_STRNCPY_FROM_USER if MM <<
32 select GENERIC_STRNLEN_USER if MMU <<
33 select HAVE_ARCH_KGDB <<
34 select HAVE_ARCH_TRACEHOOK <<
35 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
36 select HAVE_DEBUG_STACKOVERFLOW <<
37 select HAVE_DEBUG_KMEMLEAK <<
38 select HAVE_IOREMAP_PROT <<
39 select HAVE_KERNEL_GZIP <<
40 select HAVE_KERNEL_LZMA <<
41 select HAVE_KPROBES <<
42 select HAVE_KRETPROBES <<
43 select HAVE_REGS_AND_STACK_ACCESS_API <<
44 select HAVE_MOD_ARCH_SPECIFIC <<
45 select HAVE_PERF_EVENTS <<
46 select HAVE_SYSCALL_TRACEPOINTS <<
47 select IRQ_DOMAIN <<
48 select LOCK_MM_AND_FIND_VMA <<
49 select MODULES_USE_ELF_RELA <<
50 select OF <<
51 select OF_EARLY_FLATTREE <<
52 select PCI_SYSCALL if PCI <<
53 select HAVE_ARCH_JUMP_LABEL if ISA_ARC <<
54 select TRACE_IRQFLAGS_SUPPORT <<
55 select HAVE_EBPF_JIT if ISA_ARCV2 <<
56 <<
57 config LOCKDEP_SUPPORT <<
58 def_bool y <<
59 7
60 config SCHED_OMIT_FRAME_POINTER !! 8 config X86
61 def_bool y !! 9 bool
>> 10 default y
>> 11 help
>> 12 This is Linux's home port. Linux was originally native to the Intel
>> 13 386, and runs on all the later x86 processors including the Intel
>> 14 486, 586, Pentiums, and various instruction-set-compatible chips by
>> 15 AMD, Cyrix, and others.
62 16
63 config GENERIC_CSUM !! 17 config MMU
64 def_bool y !! 18 bool
>> 19 default y
65 20
66 config ARCH_FLATMEM_ENABLE !! 21 config SBUS
67 def_bool y !! 22 bool
68 23
69 config MMU !! 24 config UID16
70 def_bool y !! 25 bool
>> 26 default y
>> 27
>> 28 config GENERIC_ISA_DMA
>> 29 bool
>> 30 default y
71 31
72 config NO_IOPORT_MAP !! 32 source "init/Kconfig"
73 def_bool y <<
74 33
75 config GENERIC_CALIBRATE_DELAY <<
76 def_bool y <<
77 34
78 config GENERIC_HWEIGHT !! 35 menu "Processor type and features"
79 def_bool y <<
80 36
81 config STACKTRACE_SUPPORT !! 37 choice
82 def_bool y !! 38 prompt "Subarchitecture Type"
83 select STACKTRACE !! 39 default X86_PC
84 40
85 menu "ARC Architecture Configuration" !! 41 config X86_PC
>> 42 bool "PC-compatible"
>> 43 help
>> 44 Choose this option if your computer is a standard PC or compatible.
86 45
87 menu "ARC Platform/SoC/Board" !! 46 config X86_VOYAGER
>> 47 bool "Voyager (NCR)"
>> 48 help
>> 49 Voyager is a MCA based 32 way capable SMP architecture proprietary
>> 50 to NCR Corp. Machine classes 345x/35xx/4100/51xx are voyager based.
>> 51
>> 52 *** WARNING ***
>> 53
>> 54 If you do not specifically know you have a Voyager based machine,
>> 55 say N here otherwise the kernel you build will not be bootable.
88 56
89 source "arch/arc/plat-tb10x/Kconfig" !! 57 config X86_NUMAQ
90 source "arch/arc/plat-axs10x/Kconfig" !! 58 bool "NUMAQ (IBM/Sequent)"
91 source "arch/arc/plat-hsdk/Kconfig" !! 59 help
>> 60 This option is used for getting Linux to run on a (IBM/Sequent) NUMA
>> 61 multiquad box. This changes the way that processors are bootstrapped,
>> 62 and uses Clustered Logical APIC addressing mode instead of Flat Logical.
>> 63 You will need a new lynxer.elf file to flash your firmware with - send
>> 64 email to Martin.Bligh@us.ibm.com
92 65
93 endmenu !! 66 config X86_SUMMIT
>> 67 bool "Summit/EXA (IBM x440)"
>> 68 depends on SMP
>> 69 help
>> 70 This option is needed for IBM systems that use the Summit/EXA chipset.
>> 71 In particular, it is needed for the x440.
94 72
95 choice !! 73 If you don't have one of these computers, you should say N here.
96 prompt "ARC Instruction Set" <<
97 default ISA_ARCV2 <<
98 74
99 config ISA_ARCOMPACT !! 75 config X86_BIGSMP
100 bool "ARCompact ISA" !! 76 bool "Support for other sub-arch SMP systems with more than 8 CPUs"
101 select CPU_NO_EFFICIENT_FFS !! 77 depends on SMP
102 help 78 help
103 The original ARC ISA of ARC600/700 c !! 79 This option is needed for the systems that have more than 8 CPUs
>> 80 and if the system is not of any sub-arch type above.
>> 81
>> 82 If you don't have such a system, you should say N here.
104 83
105 config ISA_ARCV2 !! 84 config X86_VISWS
106 bool "ARC ISA v2" !! 85 bool "SGI 320/540 (Visual Workstation)"
107 select ARC_TIMERS_64BIT <<
108 help 86 help
109 ISA for the Next Generation ARC-HS c !! 87 The SGI Visual Workstation series is an IA32-based workstation
>> 88 based on SGI systems chips with some legacy PC hardware attached.
>> 89
>> 90 Say Y here to create a kernel to run on the SGI 320 or 540.
>> 91
>> 92 A kernel compiled for the Visual Workstation will not run on PCs
>> 93 and vice versa. See <file:Documentation/sgi-visws.txt> for details.
>> 94
>> 95 config X86_GENERICARCH
>> 96 bool "Generic architecture (Summit, bigsmp, default)"
>> 97 depends on SMP
>> 98 help
>> 99 This option compiles in the Summit, bigsmp, default subarchitectures.
>> 100 It is intended for a generic binary kernel.
>> 101
>> 102 config X86_ES7000
>> 103 bool "Support for Unisys ES7000 IA32 series"
>> 104 depends on SMP
>> 105 help
>> 106 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
>> 107 supposed to run on an IA32-based Unisys ES7000 system.
>> 108 Only choose this option if you have such a system, otherwise you
>> 109 should say N here.
110 110
111 endchoice 111 endchoice
112 112
113 menu "ARC CPU Configuration" !! 113 config ACPI_SRAT
>> 114 bool
>> 115 default y
>> 116 depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
>> 117
>> 118 config X86_CYCLONE_TIMER
>> 119 bool
>> 120 default y
>> 121 depends on X86_SUMMIT || X86_GENERICARCH
>> 122
>> 123 config ES7000_CLUSTERED_APIC
>> 124 bool
>> 125 default y
>> 126 depends on SMP && X86_ES7000 && MPENTIUMIII
114 127
115 choice 128 choice
116 prompt "ARC Core" !! 129 prompt "Processor family"
117 default ARC_CPU_770 if ISA_ARCOMPACT !! 130 default M686
118 default ARC_CPU_HS if ISA_ARCV2 !! 131
119 !! 132 config M386
120 config ARC_CPU_770 !! 133 bool "386"
121 bool "ARC770" !! 134 ---help---
122 depends on ISA_ARCOMPACT !! 135 This is the processor type of your CPU. This information is used for
123 select ARC_HAS_SWAPE !! 136 optimizing purposes. In order to compile a kernel that can run on
124 help !! 137 all x86 CPU types (albeit not optimally fast), you can specify
125 Support for ARC770 core introduced w !! 138 "386" here.
126 This core has a bunch of cool new fe !! 139
127 -MMU-v3: Variable Page Sz (4k, 8k, 1 !! 140 The kernel will not necessarily run on earlier architectures than
128 Shared Address Spaces (for !! 141 the one you have chosen, e.g. a Pentium optimized kernel will run on
129 -Caches: New Prog Model, Region Flus !! 142 a PPro, but not necessarily on a i486.
130 -Insns: endian swap, load-locked/sto !! 143
131 !! 144 Here are the settings recommended for greatest speed:
132 config ARC_CPU_HS !! 145 - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
133 bool "ARC-HS" !! 146 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
134 depends on ISA_ARCV2 !! 147 will run on a 386 class machine.
135 help !! 148 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
136 Support for ARC HS38x Cores based on !! 149 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
137 The notable features are: !! 150 - "586" for generic Pentium CPUs lacking the TSC
138 - SMP configurations of up to 4 co !! 151 (time stamp counter) register.
139 - Optional L2 Cache and IO-Coheren !! 152 - "Pentium-Classic" for the Intel Pentium.
140 - Revised Interrupt Architecture ( !! 153 - "Pentium-MMX" for the Intel Pentium MMX.
141 auto stack switch, auto regfil !! 154 - "Pentium-Pro" for the Intel Pentium Pro.
142 - MMUv4 (PIPT dcache, Huge Pages) !! 155 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
143 - Instructions for !! 156 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
144 * 64bit load/store: LDD, STD !! 157 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
145 * Hardware assisted divide/rem !! 158 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
146 * Function prologue/epilogue: !! 159 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
147 * IRQ enable/disable: CLRI, SE !! 160 - "Crusoe" for the Transmeta Crusoe series.
148 * pop count: FFS, FLS !! 161 - "Winchip-C6" for original IDT Winchip.
149 * SETcc, BMSKN, XBFU... !! 162 - "Winchip-2" for IDT Winchip 2.
>> 163 - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
>> 164 - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
>> 165 - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
>> 166
>> 167 If you don't know what to do, choose "386".
>> 168
>> 169 config M486
>> 170 bool "486"
>> 171 help
>> 172 Select this for a 486 series processor, either Intel or one of the
>> 173 compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX,
>> 174 DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
>> 175 U5S.
>> 176
>> 177 config M586
>> 178 bool "586/K5/5x86/6x86/6x86MX"
>> 179 help
>> 180 Select this for an 586 or 686 series processor such as the AMD K5,
>> 181 the Intel 5x86 or 6x86, or the Intel 6x86MX. This choice does not
>> 182 assume the RDTSC (Read Time Stamp Counter) instruction.
>> 183
>> 184 config M586TSC
>> 185 bool "Pentium-Classic"
>> 186 help
>> 187 Select this for a Pentium Classic processor with the RDTSC (Read
>> 188 Time Stamp Counter) instruction for benchmarking.
>> 189
>> 190 config M586MMX
>> 191 bool "Pentium-MMX"
>> 192 help
>> 193 Select this for a Pentium with the MMX graphics/multimedia
>> 194 extended instructions.
>> 195
>> 196 config M686
>> 197 bool "Pentium-Pro"
>> 198 help
>> 199 Select this for Intel Pentium Pro chips. This enables the use of
>> 200 Pentium Pro extended instructions, and disables the init-time guard
>> 201 against the f00f bug found in earlier Pentiums.
>> 202
>> 203 config MPENTIUMII
>> 204 bool "Pentium-II/Celeron(pre-Coppermine)"
>> 205 help
>> 206 Select this for Intel chips based on the Pentium-II and
>> 207 pre-Coppermine Celeron core. This option enables an unaligned
>> 208 copy optimization, compiles the kernel with optimization flags
>> 209 tailored for the chip, and applies any applicable Pentium Pro
>> 210 optimizations.
>> 211
>> 212 config MPENTIUMIII
>> 213 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
>> 214 help
>> 215 Select this for Intel chips based on the Pentium-III and
>> 216 Celeron-Coppermine core. This option enables use of some
>> 217 extended prefetch instructions in addition to the Pentium II
>> 218 extensions.
>> 219
>> 220 config MPENTIUM4
>> 221 bool "Pentium-4/Celeron(P4-based)/Xeon"
>> 222 help
>> 223 Select this for Intel Pentium 4 chips. This includes both
>> 224 the Pentium 4 and P4-based Celeron chips. This option
>> 225 enables compile flags optimized for the chip, uses the
>> 226 correct cache shift, and applies any applicable Pentium III
>> 227 optimizations.
>> 228
>> 229 config MK6
>> 230 bool "K6/K6-II/K6-III"
>> 231 help
>> 232 Select this for an AMD K6-family processor. Enables use of
>> 233 some extended instructions, and passes appropriate optimization
>> 234 flags to GCC.
>> 235
>> 236 config MK7
>> 237 bool "Athlon/Duron/K7"
>> 238 help
>> 239 Select this for an AMD Athlon K7-family processor. Enables use of
>> 240 some extended instructions, and passes appropriate optimization
>> 241 flags to GCC.
>> 242
>> 243 config MK8
>> 244 bool "Opteron/Athlon64/Hammer/K8"
>> 245 help
>> 246 Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables
>> 247 use of some extended instructions, and passes appropriate optimization
>> 248 flags to GCC.
>> 249
>> 250 config MELAN
>> 251 bool "Elan"
>> 252
>> 253 config MCRUSOE
>> 254 bool "Crusoe"
>> 255 help
>> 256 Select this for a Transmeta Crusoe processor. Treats the processor
>> 257 like a 586 with TSC, and sets some GCC optimization flags (like a
>> 258 Pentium Pro with no alignment requirements).
>> 259
>> 260 config MWINCHIPC6
>> 261 bool "Winchip-C6"
>> 262 help
>> 263 Select this for an IDT Winchip C6 chip. Linux and GCC
>> 264 treat this chip as a 586TSC with some extended instructions
>> 265 and alignment requirements.
>> 266
>> 267 config MWINCHIP2
>> 268 bool "Winchip-2"
>> 269 help
>> 270 Select this for an IDT Winchip-2. Linux and GCC
>> 271 treat this chip as a 586TSC with some extended instructions
>> 272 and alignment requirements.
>> 273
>> 274 config MWINCHIP3D
>> 275 bool "Winchip-2A/Winchip-3"
>> 276 help
>> 277 Select this for an IDT Winchip-2A or 3. Linux and GCC
>> 278 treat this chip as a 586TSC with some extended instructions
>> 279 and alignment reqirements. Also enable out of order memory
>> 280 stores for this CPU, which can increase performance of some
>> 281 operations.
>> 282
>> 283 config MCYRIXIII
>> 284 bool "CyrixIII/VIA-C3"
>> 285 help
>> 286 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
>> 287 treat this chip as a generic 586. Whilst the CPU is 686 class,
>> 288 it lacks the cmov extension which gcc assumes is present when
>> 289 generating 686 code.
>> 290 Note that Nehemiah (Model 9) and above will not boot with this
>> 291 kernel due to them lacking the 3DNow! instructions used in earlier
>> 292 incarnations of the CPU.
>> 293
>> 294 config MVIAC3_2
>> 295 bool "VIA C3-2 (Nehemiah)"
>> 296 help
>> 297 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
>> 298 of SSE and tells gcc to treat the CPU as a 686.
>> 299 Note, this kernel will not boot on older (pre model 9) C3s.
150 300
151 endchoice 301 endchoice
152 302
153 config ARC_TUNE_MCPU !! 303 config X86_GENERIC
154 string "Override default -mcpu compile !! 304 bool "Generic x86 support"
155 default "" !! 305 help
156 help !! 306 Including some tuning for non selected x86 CPUs too.
157 Override default -mcpu=xxx compiler !! 307 when it has moderate overhead. This is intended for generic
158 the ISA version) with the specified !! 308 distributions kernels.
159 NOTE: If specified flag isn't suppor <<
160 ISA default value will be used as a <<
161 309
162 config CPU_BIG_ENDIAN !! 310 #
163 bool "Enable Big Endian Mode" !! 311 # Define implied options from the CPU selection here
164 help !! 312 #
165 Build kernel for Big Endian Mode of !! 313 config X86_CMPXCHG
>> 314 bool
>> 315 depends on !M386
>> 316 default y
166 317
167 config SMP !! 318 config X86_XADD
168 bool "Symmetric Multi-Processing" !! 319 bool
169 select ARC_MCIP if ISA_ARCV2 !! 320 depends on !M386
170 help !! 321 default y
171 This enables support for systems wit <<
172 322
173 if SMP !! 323 config X86_L1_CACHE_SHIFT
>> 324 int
>> 325 default "7" if MPENTIUM4 || X86_GENERIC
>> 326 default "4" if MELAN || M486 || M386
>> 327 default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2
>> 328 default "6" if MK7 || MK8
>> 329
>> 330 config RWSEM_GENERIC_SPINLOCK
>> 331 bool
>> 332 depends on M386
>> 333 default y
174 334
175 config NR_CPUS !! 335 config RWSEM_XCHGADD_ALGORITHM
176 int "Maximum number of CPUs (2-4096)" !! 336 bool
177 range 2 4096 !! 337 depends on !M386
178 default "4" !! 338 default y
179 339
180 config ARC_SMP_HALT_ON_RESET !! 340 config X86_PPRO_FENCE
181 bool "Enable Halt-on-reset boot mode" !! 341 bool
182 help !! 342 depends on M686 || M586MMX || M586TSC || M586 || M486 || M386
183 In SMP configuration cores can be co !! 343 default y
184 or they could all start at same time <<
185 masters are parked until Master kick <<
186 at designated entry point. For other <<
187 entry point and spin wait for Master <<
188 344
189 endif #SMP !! 345 config X86_F00F_BUG
>> 346 bool
>> 347 depends on M586MMX || M586TSC || M586 || M486 || M386
>> 348 default y
190 349
191 config ARC_MCIP !! 350 config X86_WP_WORKS_OK
192 bool "ARConnect Multicore IP (MCIP) Su !! 351 bool
193 depends on ISA_ARCV2 !! 352 depends on !M386
194 default y if SMP !! 353 default y
195 help <<
196 This IP block enables SMP in ARC-HS3 <<
197 It provides for cross-core interrupt <<
198 hardware semaphores, shared memory,. <<
199 354
200 menuconfig ARC_CACHE !! 355 config X86_INVLPG
201 bool "Enable Cache Support" !! 356 bool
>> 357 depends on !M386
202 default y 358 default y
203 359
204 if ARC_CACHE !! 360 config X86_BSWAP
>> 361 bool
>> 362 depends on !M386
>> 363 default y
205 364
206 config ARC_CACHE_LINE_SHIFT !! 365 config X86_POPAD_OK
207 int "Cache Line Length (as power of 2) !! 366 bool
208 range 5 7 !! 367 depends on !M386
209 default "6" !! 368 default y
210 help <<
211 Starting with ARC700 4.9, Cache line <<
212 This option specifies "N", with Line <<
213 So line lengths of 32, 64, 128 are s <<
214 Linux only supports same line length <<
215 369
216 config ARC_HAS_ICACHE !! 370 config X86_ALIGNMENT_16
217 bool "Use Instruction Cache" !! 371 bool
>> 372 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2
218 default y 373 default y
219 374
220 config ARC_HAS_DCACHE !! 375 config X86_GOOD_APIC
221 bool "Use Data Cache" !! 376 bool
>> 377 depends on MK7 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8
222 default y 378 default y
223 379
224 config ARC_CACHE_PAGES !! 380 config X86_INTEL_USERCOPY
225 bool "Per Page Cache Control" !! 381 bool
>> 382 depends on MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7
226 default y 383 default y
227 depends on ARC_HAS_ICACHE || ARC_HAS_D <<
228 help <<
229 This can be used to over-ride the gl <<
230 per-page basis (but only for pages a <<
231 Kernel Virtual address or User Virtu <<
232 TLB entries have a per-page Cache En <<
233 Note that Global I/D ENABLE + Per Pa <<
234 Global DISABLE + Per Page ENABLE won <<
235 384
236 endif #ARC_CACHE !! 385 config X86_USE_PPRO_CHECKSUM
>> 386 bool
>> 387 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2
>> 388 default y
237 389
238 config ARC_HAS_ICCM !! 390 config X86_USE_3DNOW
239 bool "Use ICCM" !! 391 bool
240 help !! 392 depends on MCYRIXIII || MK7
241 Single Cycle RAMS to store Fast Path !! 393 default y
242 394
243 config ARC_ICCM_SZ !! 395 config X86_OOSTORE
244 int "ICCM Size in KB" !! 396 bool
245 default "64" !! 397 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6
246 depends on ARC_HAS_ICCM !! 398 default y
247 399
248 config ARC_HAS_DCCM !! 400 config HPET_TIMER
249 bool "Use DCCM" !! 401 bool "HPET Timer Support"
250 help 402 help
251 Single Cycle RAMS to store Fast Path !! 403 This enables the use of the HPET for the kernel's internal timer.
>> 404 HPET is the next generation timer replacing legacy 8254s.
>> 405 You can safely choose Y here. However, HPET will only be
>> 406 activated if the platform and the BIOS support this feature.
>> 407 Otherwise the 8254 will be used for timing services.
252 408
253 config ARC_DCCM_SZ !! 409 Choose N to continue using the legacy 8254 timer.
254 int "DCCM Size in KB" <<
255 default "64" <<
256 depends on ARC_HAS_DCCM <<
257 410
258 config ARC_DCCM_BASE !! 411 config HPET_EMULATE_RTC
259 hex "DCCM map address" !! 412 def_bool HPET_TIMER && RTC=y
260 default "0xA0000000" <<
261 depends on ARC_HAS_DCCM <<
262 413
263 choice !! 414 config SMP
264 prompt "MMU Version" !! 415 bool "Symmetric multi-processing support"
265 default ARC_MMU_V3 if ISA_ARCOMPACT !! 416 ---help---
266 default ARC_MMU_V4 if ISA_ARCV2 !! 417 This enables support for systems with more than one CPU. If you have
267 !! 418 a system with only one CPU, like most personal computers, say N. If
268 config ARC_MMU_V3 !! 419 you have a system with more than one CPU, say Y.
269 bool "MMU v3" !! 420
270 depends on ISA_ARCOMPACT !! 421 If you say N here, the kernel will run on single and multiprocessor
271 help !! 422 machines, but will use only one CPU of a multiprocessor machine. If
272 Introduced with ARC700 4.10: New Fea !! 423 you say Y here, the kernel will run on many, but not all,
273 Variable Page size (1k-16k), var JTL !! 424 singleprocessor machines. On a singleprocessor machine, the kernel
274 Shared Address Spaces (SASID) !! 425 will run faster if you say N here.
275 !! 426
276 config ARC_MMU_V4 !! 427 Note that if you say Y here and choose architecture "586" or
277 bool "MMU v4" !! 428 "Pentium" under "Processor family", the kernel will not work on 486
278 depends on ISA_ARCV2 !! 429 architectures. Similarly, multiprocessor kernels for the "PPro"
>> 430 architecture may not work on all Pentium based boards.
>> 431
>> 432 People using multiprocessor machines who say Y here should also say
>> 433 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 434 Management" code will be disabled if you say Y here.
>> 435
>> 436 See also the <file:Documentation/smp.tex>,
>> 437 <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>,
>> 438 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
>> 439 <http://www.tldp.org/docs.html#howto>.
279 440
280 endchoice !! 441 If you don't know what to do here, say N.
281 442
>> 443 config NR_CPUS
>> 444 int "Maximum number of CPUs (2-255)"
>> 445 depends on SMP
>> 446 default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
>> 447 default "8"
>> 448 help
>> 449 This allows you to specify the maximum number of CPUs which this
>> 450 kernel will support. The maximum supported value is 255 and the
>> 451 minimum value which makes sense is 2.
>> 452
>> 453 This is purely to save memory - each supported CPU adds
>> 454 approximately eight kilobytes to the kernel image.
>> 455
>> 456 config PREEMPT
>> 457 bool "Preemptible Kernel"
>> 458 help
>> 459 This option reduces the latency of the kernel when reacting to
>> 460 real-time or interactive events by allowing a low priority process to
>> 461 be preempted even if it is in kernel mode executing a system call.
>> 462 This allows applications to run more reliably even when the system is
>> 463 under load.
>> 464
>> 465 Say Y here if you are building a kernel for a desktop, embedded
>> 466 or real-time system. Say N if you are unsure.
>> 467
>> 468 config X86_UP_APIC
>> 469 bool "Local APIC support on uniprocessors" if !SMP
>> 470 depends on !(X86_VISWS || X86_VOYAGER)
>> 471 ---help---
>> 472 A local APIC (Advanced Programmable Interrupt Controller) is an
>> 473 integrated interrupt controller in the CPU. If you have a single-CPU
>> 474 system which has a processor with a local APIC, you can say Y here to
>> 475 enable and use it. If you say Y here even though your machine doesn't
>> 476 have a local APIC, then the kernel will still run with no slowdown at
>> 477 all. The local APIC supports CPU-generated self-interrupts (timer,
>> 478 performance counters), and the NMI watchdog which detects hard
>> 479 lockups.
>> 480
>> 481 If you have a system with several CPUs, you do not need to say Y
>> 482 here: the local APIC will be used automatically.
>> 483
>> 484 config X86_UP_IOAPIC
>> 485 bool "IO-APIC support on uniprocessors"
>> 486 depends on !SMP && X86_UP_APIC
>> 487 help
>> 488 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
>> 489 SMP-capable replacement for PC-style interrupt controllers. Most
>> 490 SMP systems and a small number of uniprocessor systems have one.
>> 491 If you have a single-CPU system with an IO-APIC, you can say Y here
>> 492 to use it. If you say Y here even though your machine doesn't have
>> 493 an IO-APIC, then the kernel will still run with no slowdown at all.
>> 494
>> 495 If you have a system with several CPUs, you do not need to say Y
>> 496 here: the IO-APIC will be used automatically.
>> 497
>> 498 config X86_LOCAL_APIC
>> 499 bool
>> 500 depends on !SMP && X86_UP_APIC
>> 501 default y
282 502
283 choice !! 503 config X86_IO_APIC
284 prompt "MMU Page Size" !! 504 bool
285 default ARC_PAGE_SIZE_8K !! 505 depends on !SMP && X86_UP_IOAPIC
>> 506 default y
286 507
287 config ARC_PAGE_SIZE_8K !! 508 config X86_TSC
288 bool "8KB" !! 509 bool
289 select HAVE_PAGE_SIZE_8KB !! 510 depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2) && !X86_NUMAQ
290 help !! 511 default y
291 Choose between 8k vs 16k <<
292 <<
293 config ARC_PAGE_SIZE_16K <<
294 select HAVE_PAGE_SIZE_16KB <<
295 bool "16KB" <<
296 <<
297 config ARC_PAGE_SIZE_4K <<
298 bool "4KB" <<
299 select HAVE_PAGE_SIZE_4KB <<
300 depends on ARC_MMU_V3 || ARC_MMU_V4 <<
301 512
302 endchoice !! 513 config X86_MCE
>> 514 bool "Machine Check Exception"
>> 515 ---help---
>> 516 Machine Check Exception support allows the processor to notify the
>> 517 kernel if it detects a problem (e.g. overheating, component failure).
>> 518 The action the kernel takes depends on the severity of the problem,
>> 519 ranging from a warning message on the console, to halting the machine.
>> 520 Your processor must be a Pentium or newer to support this - check the
>> 521 flags in /proc/cpuinfo for mce. Note that some older Pentium systems
>> 522 have a design flaw which leads to false MCE events - hence MCE is
>> 523 disabled on all P5 processors, unless explicitly enabled with "mce"
>> 524 as a boot argument. Similarly, if MCE is built in and creates a
>> 525 problem on some new non-standard machine, you can boot with "nomce"
>> 526 to disable it. MCE support simply ignores non-MCE processors like
>> 527 the 386 and 486, so nearly everyone can say Y here.
>> 528
>> 529 config X86_MCE_NONFATAL
>> 530 bool "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
>> 531 depends on X86_MCE
>> 532 help
>> 533 Enabling this feature starts a timer that triggers every 5 seconds which
>> 534 will look at the machine check registers to see if anything happened.
>> 535 Non-fatal problems automatically get corrected (but still logged).
>> 536 Disable this if you don't want to see these messages.
>> 537 Seeing the messages this option prints out may be indicative of dying hardware,
>> 538 or out-of-spec (ie, overclocked) hardware.
>> 539 This option only does something on certain CPUs.
>> 540 (AMD Athlon/Duron and Intel Pentium 4)
>> 541
>> 542 config X86_MCE_P4THERMAL
>> 543 bool "check for P4 thermal throttling interrupt."
>> 544 depends on X86_MCE && (X86_UP_APIC || SMP)
>> 545 help
>> 546 Enabling this feature will cause a message to be printed when the P4
>> 547 enters thermal throttling.
>> 548
>> 549 config TOSHIBA
>> 550 tristate "Toshiba Laptop support"
>> 551 ---help---
>> 552 This adds a driver to safely access the System Management Mode of
>> 553 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
>> 554 not work on models with a Phoenix BIOS. The System Management Mode
>> 555 is used to set the BIOS and power saving options on Toshiba portables.
>> 556
>> 557 For information on utilities to make use of this driver see the
>> 558 Toshiba Linux utilities web site at:
>> 559 <http://www.buzzard.org.uk/toshiba/>.
>> 560
>> 561 Say Y if you intend to run this kernel on a Toshiba portable.
>> 562 Say N otherwise.
>> 563
>> 564 config I8K
>> 565 tristate "Dell laptop support"
>> 566 ---help---
>> 567 This adds a driver to safely access the System Management Mode
>> 568 of the CPU on the Dell Inspiron 8000. The System Management Mode
>> 569 is used to read cpu temperature and cooling fan status and to
>> 570 control the fans on the I8K portables.
>> 571
>> 572 This driver has been tested only on the Inspiron 8000 but it may
>> 573 also work with other Dell laptops. You can force loading on other
>> 574 models by passing the parameter `force=1' to the module. Use at
>> 575 your own risk.
>> 576
>> 577 For information on utilities to make use of this driver see the
>> 578 I8K Linux utilities web site at:
>> 579 <http://www.debian.org/~dz/i8k/>
>> 580
>> 581 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
>> 582 Say N otherwise.
>> 583
>> 584 config MICROCODE
>> 585 tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
>> 586 ---help---
>> 587 If you say Y here and also to "/dev file system support" in the
>> 588 'File systems' section, you will be able to update the microcode on
>> 589 Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
>> 590 Pentium III, Pentium 4, Xeon etc. You will obviously need the
>> 591 actual microcode binary data itself which is not shipped with the
>> 592 Linux kernel.
>> 593
>> 594 For latest news and information on obtaining all the required
>> 595 ingredients for this driver, check:
>> 596 <http://www.urbanmyth.org/microcode/>.
>> 597
>> 598 To compile this driver as a module, choose M here: the
>> 599 module will be called microcode.
>> 600 If you use modprobe or kmod you may also want to add the line
>> 601 'alias char-major-10-184 microcode' to your /etc/modules.conf file.
>> 602
>> 603 config X86_MSR
>> 604 tristate "/dev/cpu/*/msr - Model-specific register support"
>> 605 help
>> 606 This device gives privileged processes access to the x86
>> 607 Model-Specific Registers (MSRs). It is a character device with
>> 608 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
>> 609 MSR accesses are directed to a specific CPU on multi-processor
>> 610 systems.
>> 611
>> 612 config X86_CPUID
>> 613 tristate "/dev/cpu/*/cpuid - CPU information support"
>> 614 help
>> 615 This device gives processes access to the x86 CPUID instruction to
>> 616 be executed on a specific processor. It is a character device
>> 617 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
>> 618 /dev/cpu/31/cpuid.
>> 619
>> 620 config EDD
>> 621 tristate "BIOS Enhanced Disk Drive calls determine boot disk (EXPERIMENTAL)"
>> 622 depends on EXPERIMENTAL
>> 623 help
>> 624 Say Y or M here if you want to enable BIOS Enhanced Disk Drive
>> 625 Services real mode BIOS calls to determine which disk
>> 626 BIOS tries boot from. This information is then exported via driverfs.
>> 627
>> 628 This option is experimental, but believed to be safe,
>> 629 and most disk controller BIOS vendors do not yet implement this feature.
303 630
304 choice 631 choice
305 prompt "MMU Super Page Size" !! 632 prompt "High Memory Support"
306 depends on ISA_ARCV2 && TRANSPARENT_HU !! 633 default NOHIGHMEM
307 default ARC_HUGEPAGE_2M <<
308 634
309 config ARC_HUGEPAGE_2M !! 635 config NOHIGHMEM
310 bool "2MB" !! 636 bool "off"
>> 637 ---help---
>> 638 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
>> 639 However, the address space of 32-bit x86 processors is only 4
>> 640 Gigabytes large. That means that, if you have a large amount of
>> 641 physical memory, not all of it can be "permanently mapped" by the
>> 642 kernel. The physical memory that's not permanently mapped is called
>> 643 "high memory".
>> 644
>> 645 If you are compiling a kernel which will never run on a machine with
>> 646 more than 1 Gigabyte total physical RAM, answer "off" here (default
>> 647 choice and suitable for most users). This will result in a "3GB/1GB"
>> 648 split: 3GB are mapped so that each process sees a 3GB virtual memory
>> 649 space and the remaining part of the 4GB virtual memory space is used
>> 650 by the kernel to permanently map as much physical memory as
>> 651 possible.
>> 652
>> 653 If the machine has between 1 and 4 Gigabytes physical RAM, then
>> 654 answer "4GB" here.
>> 655
>> 656 If more than 4 Gigabytes is used then answer "64GB" here. This
>> 657 selection turns Intel PAE (Physical Address Extension) mode on.
>> 658 PAE implements 3-level paging on IA32 processors. PAE is fully
>> 659 supported by Linux, PAE mode is implemented on all recent Intel
>> 660 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
>> 661 then the kernel will not boot on CPUs that don't support PAE!
>> 662
>> 663 The actual amount of total physical memory will either be
>> 664 auto detected or can be forced by using a kernel command line option
>> 665 such as "mem=256M". (Try "man bootparam" or see the documentation of
>> 666 your boot loader (lilo or loadlin) about how to pass options to the
>> 667 kernel at boot time.)
>> 668
>> 669 If unsure, say "off".
>> 670
>> 671 config HIGHMEM4G
>> 672 bool "4GB"
>> 673 help
>> 674 Select this if you have a 32-bit processor and between 1 and 4
>> 675 gigabytes of physical RAM.
311 676
312 config ARC_HUGEPAGE_16M !! 677 config HIGHMEM64G
313 bool "16MB" !! 678 bool "64GB"
>> 679 help
>> 680 Select this if you have a 32-bit processor and more than 4
>> 681 gigabytes of physical RAM.
314 682
315 endchoice 683 endchoice
316 684
317 config PGTABLE_LEVELS !! 685 config HIGHMEM
318 int "Number of Page table levels" !! 686 bool
319 default 2 !! 687 depends on HIGHMEM64G || HIGHMEM4G
>> 688 default y
320 689
321 config ARC_COMPACT_IRQ_LEVELS !! 690 config X86_PAE
322 depends on ISA_ARCOMPACT !! 691 bool
323 bool "Setup Timer IRQ as high Priority !! 692 depends on HIGHMEM64G
324 # if SMP, LV2 enabled ONLY if ARC impl !! 693 default y
325 depends on !SMP <<
326 694
327 config ARC_FPU_SAVE_RESTORE !! 695 # Common NUMA Features
328 bool "Enable FPU state persistence acr !! 696 config NUMA
329 help !! 697 bool "Numa Memory Allocation Support"
330 ARCompact FPU has internal registers !! 698 depends on SMP && HIGHMEM64G && (X86_PC || X86_NUMAQ || X86_GENERICARCH || (X86_SUMMIT && ACPI && !ACPI_HT_ONLY))
331 Floating Point operations. There are !! 699 default n if X86_PC
332 for floating point exceptions and ro !! 700 default y if (X86_NUMAQ || X86_SUMMIT)
333 preserved across task context switch !! 701
>> 702 # Need comments to help the hapless user trying to turn on NUMA support
>> 703 comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support"
>> 704 depends on X86_NUMAQ && (!HIGHMEM64G || !SMP)
>> 705
>> 706 comment "NUMA (Summit) requires SMP, 64GB highmem support, full ACPI"
>> 707 depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI || ACPI_HT_ONLY)
>> 708
>> 709 config DISCONTIGMEM
>> 710 bool
>> 711 depends on NUMA
>> 712 default y
334 713
335 config ARC_CANT_LLSC !! 714 config HAVE_ARCH_BOOTMEM_NODE
336 def_bool n !! 715 bool
>> 716 depends on NUMA
>> 717 default y
337 718
338 config ARC_HAS_LLSC !! 719 config HIGHPTE
339 bool "Insn: LLOCK/SCOND (efficient ato !! 720 bool "Allocate 3rd-level pagetables from highmem"
>> 721 depends on HIGHMEM4G || HIGHMEM64G
>> 722 help
>> 723 The VM uses one page table entry for each page of physical memory.
>> 724 For systems with a lot of RAM, this can be wasteful of precious
>> 725 low memory. Setting this option will put user-space page table
>> 726 entries in high memory.
>> 727
>> 728 config MATH_EMULATION
>> 729 bool "Math emulation"
>> 730 ---help---
>> 731 Linux can emulate a math coprocessor (used for floating point
>> 732 operations) if you don't have one. 486DX and Pentium processors have
>> 733 a math coprocessor built in, 486SX and 386 do not, unless you added
>> 734 a 487DX or 387, respectively. (The messages during boot time can
>> 735 give you some hints here ["man dmesg"].) Everyone needs either a
>> 736 coprocessor or this emulation.
>> 737
>> 738 If you don't have a math coprocessor, you need to say Y here; if you
>> 739 say Y here even though you have a coprocessor, the coprocessor will
>> 740 be used nevertheless. (This behavior can be changed with the kernel
>> 741 command line option "no387", which comes handy if your coprocessor
>> 742 is broken. Try "man bootparam" or see the documentation of your boot
>> 743 loader (lilo or loadlin) about how to pass options to the kernel at
>> 744 boot time.) This means that it is a good idea to say Y here if you
>> 745 intend to use this kernel on different machines.
>> 746
>> 747 More information about the internals of the Linux math coprocessor
>> 748 emulation can be found in <file:arch/i386/math-emu/README>.
>> 749
>> 750 If you are not sure, say Y; apart from resulting in a 66 KB bigger
>> 751 kernel, it won't hurt.
>> 752
>> 753 config MTRR
>> 754 bool "MTRR (Memory Type Range Register) support"
>> 755 ---help---
>> 756 On Intel P6 family processors (Pentium Pro, Pentium II and later)
>> 757 the Memory Type Range Registers (MTRRs) may be used to control
>> 758 processor access to memory ranges. This is most useful if you have
>> 759 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
>> 760 allows bus write transfers to be combined into a larger transfer
>> 761 before bursting over the PCI/AGP bus. This can increase performance
>> 762 of image write operations 2.5 times or more. Saying Y here creates a
>> 763 /proc/mtrr file which may be used to manipulate your processor's
>> 764 MTRRs. Typically the X server should use this.
>> 765
>> 766 This code has a reasonably generic interface so that similar
>> 767 control registers on other processors can be easily supported
>> 768 as well:
>> 769
>> 770 The Cyrix 6x86, 6x86MX and M II processors have Address Range
>> 771 Registers (ARRs) which provide a similar functionality to MTRRs. For
>> 772 these, the ARRs are used to emulate the MTRRs.
>> 773 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
>> 774 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
>> 775 write-combining. All of these processors are supported by this code
>> 776 and it makes sense to say Y here if you have one of them.
>> 777
>> 778 Saying Y here also fixes a problem with buggy SMP BIOSes which only
>> 779 set the MTRRs for the boot CPU and not for the secondary CPUs. This
>> 780 can lead to all sorts of problems, so it's good to say Y here.
>> 781
>> 782 You can safely say Y even if your machine doesn't have MTRRs, you'll
>> 783 just add about 9 KB to your kernel.
>> 784
>> 785 See <file:Documentation/mtrr.txt> for more information.
>> 786
>> 787 config HAVE_DEC_LOCK
>> 788 bool
>> 789 depends on (SMP || PREEMPT) && X86_CMPXCHG
340 default y 790 default y
341 depends on !ARC_CANT_LLSC <<
342 791
343 config ARC_HAS_SWAPE !! 792 # turning this on wastes a bunch of space.
344 bool "Insn: SWAPE (endian-swap)" !! 793 # Summit needs it only when NUMA is on
>> 794 config BOOT_IOREMAP
>> 795 bool
>> 796 depends on ((X86_SUMMIT || X86_GENERICARCH) && NUMA)
345 default y 797 default y
346 798
347 if ISA_ARCV2 !! 799 endmenu
348 800
349 config ARC_USE_UNALIGNED_MEM_ACCESS <<
350 bool "Enable unaligned access in HW" <<
351 default y <<
352 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
353 help <<
354 The ARC HS architecture supports una <<
355 which is disabled by default. Enable <<
356 hardware and use software to use it <<
357 801
358 config ARC_HAS_LL64 !! 802 menu "Power management options (ACPI, APM)"
359 bool "Insn: 64bit LDD/STD" !! 803 depends on !X86_VOYAGER
360 help !! 804
361 Enable gcc to generate 64-bit load/s !! 805 source kernel/power/Kconfig
362 ISA mandates even/odd registers to a !! 806
363 dest operands with 2 possible source !! 807 source "drivers/acpi/Kconfig"
364 default y !! 808
>> 809 menu "APM (Advanced Power Management) BIOS Support"
>> 810 depends on PM
>> 811
>> 812 config APM
>> 813 tristate "APM (Advanced Power Management) BIOS support"
>> 814 depends on PM
>> 815 ---help---
>> 816 APM is a BIOS specification for saving power using several different
>> 817 techniques. This is mostly useful for battery powered laptops with
>> 818 APM compliant BIOSes. If you say Y here, the system time will be
>> 819 reset after a RESUME operation, the /proc/apm device will provide
>> 820 battery status information, and user-space programs will receive
>> 821 notification of APM "events" (e.g. battery status change).
>> 822
>> 823 If you select "Y" here, you can disable actual use of the APM
>> 824 BIOS by passing the "apm=off" option to the kernel at boot time.
>> 825
>> 826 Note that the APM support is almost completely disabled for
>> 827 machines with more than one CPU.
>> 828
>> 829 In order to use APM, you will need supporting software. For location
>> 830 and more information, read <file:Documentation/pm.txt> and the
>> 831 Battery Powered Linux mini-HOWTO, available from
>> 832 <http://www.tldp.org/docs.html#howto>.
>> 833
>> 834 This driver does not spin down disk drives (see the hdparm(8)
>> 835 manpage ("man 8 hdparm") for that), and it doesn't turn off
>> 836 VESA-compliant "green" monitors.
>> 837
>> 838 This driver does not support the TI 4000M TravelMate and the ACER
>> 839 486/DX4/75 because they don't have compliant BIOSes. Many "green"
>> 840 desktop machines also don't have compliant BIOSes, and this driver
>> 841 may cause those machines to panic during the boot phase.
>> 842
>> 843 Generally, if you don't have a battery in your machine, there isn't
>> 844 much point in using this driver and you should say N. If you get
>> 845 random kernel OOPSes or reboots that don't seem to be related to
>> 846 anything, try disabling/enabling this option (or disabling/enabling
>> 847 APM in your BIOS).
>> 848
>> 849 Some other things you should try when experiencing seemingly random,
>> 850 "weird" problems:
>> 851
>> 852 1) make sure that you have enough swap space and that it is
>> 853 enabled.
>> 854 2) pass the "no-hlt" option to the kernel
>> 855 3) switch on floating point emulation in the kernel and pass
>> 856 the "no387" option to the kernel
>> 857 4) pass the "floppy=nodma" option to the kernel
>> 858 5) pass the "mem=4M" option to the kernel (thereby disabling
>> 859 all but the first 4 MB of RAM)
>> 860 6) make sure that the CPU is not over clocked.
>> 861 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
>> 862 8) disable the cache from your BIOS settings
>> 863 9) install a fan for the video card or exchange video RAM
>> 864 10) install a better fan for the CPU
>> 865 11) exchange RAM chips
>> 866 12) exchange the motherboard.
>> 867
>> 868 To compile this driver as a module, choose M here: the
>> 869 module will be called apm.
>> 870
>> 871 config APM_IGNORE_USER_SUSPEND
>> 872 bool "Ignore USER SUSPEND"
>> 873 depends on APM
>> 874 help
>> 875 This option will ignore USER SUSPEND requests. On machines with a
>> 876 compliant APM BIOS, you want to say N. However, on the NEC Versa M
>> 877 series notebooks, it is necessary to say Y because of a BIOS bug.
>> 878
>> 879 config APM_DO_ENABLE
>> 880 bool "Enable PM at boot time"
>> 881 depends on APM
>> 882 ---help---
>> 883 Enable APM features at boot time. From page 36 of the APM BIOS
>> 884 specification: "When disabled, the APM BIOS does not automatically
>> 885 power manage devices, enter the Standby State, enter the Suspend
>> 886 State, or take power saving steps in response to CPU Idle calls."
>> 887 This driver will make CPU Idle calls when Linux is idle (unless this
>> 888 feature is turned off -- see "Do CPU IDLE calls", below). This
>> 889 should always save battery power, but more complicated APM features
>> 890 will be dependent on your BIOS implementation. You may need to turn
>> 891 this option off if your computer hangs at boot time when using APM
>> 892 support, or if it beeps continuously instead of suspending. Turn
>> 893 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
>> 894 T400CDT. This is off by default since most machines do fine without
>> 895 this feature.
>> 896
>> 897 config APM_CPU_IDLE
>> 898 bool "Make CPU Idle calls when idle"
>> 899 depends on APM
>> 900 help
>> 901 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
>> 902 On some machines, this can activate improved power savings, such as
>> 903 a slowed CPU clock rate, when the machine is idle. These idle calls
>> 904 are made after the idle loop has run for some length of time (e.g.,
>> 905 333 mS). On some machines, this will cause a hang at boot time or
>> 906 whenever the CPU becomes idle. (On machines with more than one CPU,
>> 907 this option does nothing.)
>> 908
>> 909 config APM_DISPLAY_BLANK
>> 910 bool "Enable console blanking using APM"
>> 911 depends on APM
>> 912 help
>> 913 Enable console blanking using the APM. Some laptops can use this to
>> 914 turn off the LCD backlight when the screen blanker of the Linux
>> 915 virtual console blanks the screen. Note that this is only used by
>> 916 the virtual console screen blanker, and won't turn off the backlight
>> 917 when using the X Window system. This also doesn't have anything to
>> 918 do with your VESA-compliant power-saving monitor. Further, this
>> 919 option doesn't work for all laptops -- it might not turn off your
>> 920 backlight at all, or it might print a lot of errors to the console,
>> 921 especially if you are using gpm.
>> 922
>> 923 config APM_RTC_IS_GMT
>> 924 bool "RTC stores time in GMT"
>> 925 depends on APM
>> 926 help
>> 927 Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
>> 928 stores the time in GMT (Greenwich Mean Time). Say N if your RTC
>> 929 stores localtime.
>> 930
>> 931 It is in fact recommended to store GMT in your RTC, because then you
>> 932 don't have to worry about daylight savings time changes. The only
>> 933 reason not to use GMT in your RTC is if you also run a broken OS
>> 934 that doesn't understand GMT.
>> 935
>> 936 config APM_ALLOW_INTS
>> 937 bool "Allow interrupts during APM BIOS calls"
>> 938 depends on APM
>> 939 help
>> 940 Normally we disable external interrupts while we are making calls to
>> 941 the APM BIOS as a measure to lessen the effects of a badly behaving
>> 942 BIOS implementation. The BIOS should reenable interrupts if it
>> 943 needs to. Unfortunately, some BIOSes do not -- especially those in
>> 944 many of the newer IBM Thinkpads. If you experience hangs when you
>> 945 suspend, try setting this to Y. Otherwise, say N.
>> 946
>> 947 config APM_REAL_MODE_POWER_OFF
>> 948 bool "Use real mode APM BIOS call to power off"
>> 949 depends on APM
>> 950 help
>> 951 Use real mode APM BIOS calls to switch off the computer. This is
>> 952 a work-around for a number of buggy BIOSes. Switch this option on if
>> 953 your computer crashes instead of powering off properly.
>> 954
>> 955 endmenu
>> 956
>> 957 source "arch/i386/kernel/cpu/cpufreq/Kconfig"
365 958
366 config ARC_HAS_DIV_REM !! 959 endmenu
367 bool "Insn: div, divu, rem, remu" !! 960
>> 961
>> 962 menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
>> 963
>> 964 config X86_VISWS_APIC
>> 965 bool
>> 966 depends on X86_VISWS
368 default y 967 default y
369 968
370 config ARC_HAS_ACCL_REGS !! 969 config X86_LOCAL_APIC
371 bool "Reg Pair ACCL:ACCH (FPU and/or M !! 970 bool
>> 971 depends on (X86_VISWS || SMP) && !X86_VOYAGER
372 default y 972 default y
373 help <<
374 Depending on the configuration, CPU <<
375 (also referred to as r58:r59). These <<
376 kernel needs to save/restore per pro <<
377 973
378 config ARC_DSP_HANDLED !! 974 config X86_IO_APIC
379 def_bool n !! 975 bool
>> 976 depends on SMP && !(X86_VISWS || X86_VOYAGER)
>> 977 default y
380 978
381 config ARC_DSP_SAVE_RESTORE_REGS !! 979 config PCI
382 def_bool n !! 980 bool "PCI support" if !X86_VISWS
>> 981 depends on !X86_VOYAGER
>> 982 default y if X86_VISWS
>> 983 help
>> 984 Find out whether you have a PCI motherboard. PCI is the name of a
>> 985 bus system, i.e. the way the CPU talks to the other stuff inside
>> 986 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
>> 987 VESA. If you have PCI, say Y, otherwise N.
>> 988
>> 989 The PCI-HOWTO, available from
>> 990 <http://www.tldp.org/docs.html#howto>, contains valuable
>> 991 information about which PCI hardware does work under Linux and which
>> 992 doesn't.
383 993
384 choice 994 choice
385 prompt "DSP support" !! 995 prompt "PCI access mode"
386 default ARC_DSP_NONE !! 996 depends on PCI && !X86_VISWS
387 help !! 997 default PCI_GOANY
388 Depending on the configuration, CPU !! 998
389 (ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_ !! 999 config PCI_GOBIOS
390 Below are options describing how to !! 1000 bool "BIOS"
391 interrupt entry / exit and in contex !! 1001 ---help---
392 !! 1002 On PCI systems, the BIOS can be used to detect the PCI devices and
393 config ARC_DSP_NONE !! 1003 determine their configuration. However, some old PCI motherboards
394 bool "No DSP extension presence in HW" !! 1004 have BIOS bugs and may crash if this is done. Also, some embedded
395 help !! 1005 PCI-based systems don't have any BIOS at all. Linux can also try to
396 No DSP extension presence in HW !! 1006 detect the PCI hardware directly without using the BIOS.
397 !! 1007
398 config ARC_DSP_KERNEL !! 1008 With this option, you can specify how Linux should detect the PCI
399 bool "DSP extension in HW, no support !! 1009 devices. If you choose "BIOS", the BIOS will be used, if you choose
400 select ARC_HAS_ACCL_REGS !! 1010 "Direct", the BIOS won't be used, and if you choose "Any", the
401 select ARC_DSP_HANDLED !! 1011 kernel will try the direct access method and falls back to the BIOS
402 help !! 1012 if that doesn't work. If unsure, go with the default, which is
403 DSP extension presence in HW, no sup !! 1013 "Any".
404 applications. We don't save / restor <<
405 some minimal preparations so userspa <<
406 <<
407 config ARC_DSP_USERSPACE <<
408 bool "Support DSP for userspace apps" <<
409 select ARC_HAS_ACCL_REGS <<
410 select ARC_DSP_HANDLED <<
411 select ARC_DSP_SAVE_RESTORE_REGS <<
412 help <<
413 DSP extension presence in HW, suppor <<
414 run DSP-enabled userspace applicatio <<
415 <<
416 config ARC_DSP_AGU_USERSPACE <<
417 bool "Support DSP with AGU for userspa <<
418 select ARC_HAS_ACCL_REGS <<
419 select ARC_DSP_HANDLED <<
420 select ARC_DSP_SAVE_RESTORE_REGS <<
421 help <<
422 DSP and AGU extensions presence in H <<
423 and AGU registers to run DSP-enabled <<
424 endchoice <<
425 1014
426 config ARC_IRQ_NO_AUTOSAVE !! 1015 config PCI_GODIRECT
427 bool "Disable hardware autosave regfil !! 1016 bool "Direct"
428 default n <<
429 help <<
430 On HS cores, taken interrupt auto sa <<
431 This is programmable and can be opti <<
432 software INTERRUPT_PROLOGUE/EPILGUE <<
433 <<
434 config ARC_LPB_DISABLE <<
435 bool "Disable loop buffer (LPB)" <<
436 help <<
437 On HS cores, loop buffer (LPB) is pr <<
438 be optionally disabled. <<
439 <<
440 endif # ISA_ARCV2 <<
441 <<
442 endmenu # "ARC CPU Configuration" <<
443 <<
444 config LINUX_LINK_BASE <<
445 hex "Kernel link address" <<
446 default "0x80000000" <<
447 help <<
448 ARC700 divides the 32 bit phy addres <<
449 -Lower 2G (0 - 0x7FFF_FFFF ) is user <<
450 -Upper 2G (0x8000_0000 onwards) is u <<
451 Typically Linux kernel is linked at <<
452 hence the default value of 0x8zs. <<
453 However some customers have peripher <<
454 Linux needs to be scooted a bit. <<
455 If you don't know what the above mea <<
456 This needs to match memory start add <<
457 <<
458 config LINUX_RAM_BASE <<
459 hex "RAM base address" <<
460 default LINUX_LINK_BASE <<
461 help <<
462 By default Linux is linked at base o <<
463 cases (such as HSDK), Linux can't be <<
464 this option. <<
465 1017
466 config HIGHMEM !! 1018 config PCI_GOANY
467 bool "High Memory Support" !! 1019 bool "Any"
468 select HAVE_ARCH_PFN_VALID <<
469 select KMAP_LOCAL <<
470 help <<
471 With ARC 2G:2G address split, only u <<
472 kernel. Enable this to potentially a <<
473 in future <<
474 1020
475 config ARC_HAS_PAE40 !! 1021 endchoice
476 bool "Support for the 40-bit Physical <<
477 depends on ISA_ARCV2 <<
478 select HIGHMEM <<
479 select PHYS_ADDR_T_64BIT <<
480 help <<
481 Enable access to physical memory bey <<
482 ARC cores with 40 bit Physical Addre <<
483 1022
484 config ARC_KVADDR_SIZE !! 1023 config PCI_BIOS
485 int "Kernel Virtual Address Space size !! 1024 bool
486 range 0 512 !! 1025 depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
487 default "256" !! 1026 default y
488 help <<
489 The kernel address space is carved o <<
490 space for catering to vmalloc, modul <<
491 not suffice vmalloc requirements of <<
492 this to be stretched to 512 MB (by e <<
493 kernel-user gutter) <<
494 1027
495 config ARC_CURR_IN_REG !! 1028 config PCI_DIRECT
496 bool "cache current task pointer in gp !! 1029 bool
>> 1030 depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
497 default y 1031 default y
>> 1032
>> 1033 source "drivers/pci/Kconfig"
>> 1034
>> 1035 config ISA
>> 1036 bool "ISA support"
>> 1037 depends on !(X86_VOYAGER || X86_VISWS)
498 help 1038 help
499 This reserves gp register to point t !! 1039 Find out whether you have ISA slots on your motherboard. ISA is the
500 kernel mode eliding memory access fo !! 1040 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 1041 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 1042 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 1043 newer boards don't support it. If you have ISA, say Y, otherwise N.
>> 1044
>> 1045 config EISA
>> 1046 bool "EISA support"
>> 1047 depends on ISA
>> 1048 ---help---
>> 1049 The Extended Industry Standard Architecture (EISA) bus was
>> 1050 developed as an open alternative to the IBM MicroChannel bus.
501 1051
>> 1052 The EISA bus provided some of the features of the IBM MicroChannel
>> 1053 bus while maintaining backward compatibility with cards made for
>> 1054 the older ISA bus. The EISA bus saw limited use between 1988 and
>> 1055 1995 when it was made obsolete by the PCI bus.
502 1056
503 config ARC_EMUL_UNALIGNED !! 1057 Say Y here if you are building a kernel for an EISA-based machine.
504 bool "Emulate unaligned memory access !! 1058
505 select SYSCTL_ARCH_UNALIGN_NO_WARN !! 1059 Otherwise, say N.
506 select SYSCTL_ARCH_UNALIGN_ALLOW !! 1060
507 depends on ISA_ARCOMPACT !! 1061 source "drivers/eisa/Kconfig"
>> 1062
>> 1063 config MCA
>> 1064 bool "MCA support"
>> 1065 depends on !(X86_VISWS || X86_VOYAGER)
508 help 1066 help
509 This enables misaligned 16 & 32 bit !! 1067 MicroChannel Architecture is found in some IBM PS/2 machines and
510 Use ONLY-IF-ABS-NECESSARY as it will !! 1068 laptops. It is a bus system similar to PCI or ISA. See
511 potential bugs in code !! 1069 <file:Documentation/mca.txt> (and especially the web page given
>> 1070 there) before attempting to build an MCA bus kernel.
>> 1071
>> 1072 config MCA
>> 1073 depends on X86_VOYAGER
>> 1074 default y if X86_VOYAGER
512 1075
513 config HZ !! 1076 source "drivers/mca/Kconfig"
514 int "Timer Frequency" <<
515 default 100 <<
516 1077
517 config ARC_METAWARE_HLINK !! 1078 config SCx200
518 bool "Support for Metaware debugger as !! 1079 tristate "NatSemi SCx200 support"
>> 1080 depends on !X86_VOYAGER
519 help 1081 help
520 This options allows a Linux userland !! 1082 This provides basic support for the National Semiconductor SCx200
521 host file system (open/creat/read/wr !! 1083 processor. Right now this is just a driver for the GPIO pins.
522 Metaware Debugger. This can come in <<
523 when there is no real usable periphe <<
524 1084
525 menuconfig ARC_DBG !! 1085 If you don't know what to do here, say N.
526 bool "ARC debugging" <<
527 default y <<
528 1086
529 if ARC_DBG !! 1087 This support is also available as a module. If compiled as a
>> 1088 module, it will be called scx200.
530 1089
531 config ARC_DW2_UNWIND !! 1090 config HOTPLUG
532 bool "Enable DWARF specific kernel sta !! 1091 bool "Support for hot-pluggable devices"
533 default y !! 1092 ---help---
534 select KALLSYMS !! 1093 Say Y here if you want to plug devices into your computer while
>> 1094 the system is running, and be able to use them quickly. In many
>> 1095 cases, the devices can likewise be unplugged at any time too.
>> 1096
>> 1097 One well known example of this is PCMCIA- or PC-cards, credit-card
>> 1098 size devices such as network cards, modems or hard drives which are
>> 1099 plugged into slots found on all modern laptop computers. Another
>> 1100 example, used on modern desktops as well as laptops, is USB.
>> 1101
>> 1102 Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
>> 1103 software (at <http://linux-hotplug.sourceforge.net/>) and install it.
>> 1104 Then your kernel will automatically call out to a user mode "policy
>> 1105 agent" (/sbin/hotplug) to load modules and set up software needed
>> 1106 to use devices as you hotplug them.
>> 1107
>> 1108 source "drivers/pcmcia/Kconfig"
>> 1109
>> 1110 source "drivers/pci/hotplug/Kconfig"
>> 1111
>> 1112 endmenu
>> 1113
>> 1114
>> 1115 menu "Executable file formats"
>> 1116
>> 1117 source "fs/Kconfig.binfmt"
>> 1118
>> 1119 endmenu
>> 1120
>> 1121 source "drivers/Kconfig"
>> 1122
>> 1123 source "fs/Kconfig"
>> 1124
>> 1125 source "arch/i386/oprofile/Kconfig"
>> 1126
>> 1127
>> 1128 menu "Kernel hacking"
>> 1129
>> 1130 config DEBUG_KERNEL
>> 1131 bool "Kernel debugging"
>> 1132 help
>> 1133 Say Y here if you are developing drivers or trying to debug and
>> 1134 identify kernel problems.
>> 1135
>> 1136 config DEBUG_STACKOVERFLOW
>> 1137 bool "Check for stack overflows"
>> 1138 depends on DEBUG_KERNEL
>> 1139
>> 1140 config DEBUG_SLAB
>> 1141 bool "Debug memory allocations"
>> 1142 depends on DEBUG_KERNEL
>> 1143 help
>> 1144 Say Y here to have the kernel do limited verification on memory
>> 1145 allocation as well as poisoning memory on free to catch use of freed
>> 1146 memory.
>> 1147
>> 1148 config DEBUG_IOVIRT
>> 1149 bool "Memory mapped I/O debugging"
>> 1150 depends on DEBUG_KERNEL
>> 1151 help
>> 1152 Say Y here to get warned whenever an attempt is made to do I/O on
>> 1153 obviously invalid addresses such as those generated when ioremap()
>> 1154 calls are forgotten. Memory mapped I/O will go through an extra
>> 1155 check to catch access to unmapped ISA addresses, an access method
>> 1156 that can still be used by old drivers that are being ported from
>> 1157 2.0/2.2.
>> 1158
>> 1159 config MAGIC_SYSRQ
>> 1160 bool "Magic SysRq key"
>> 1161 depends on DEBUG_KERNEL
>> 1162 help
>> 1163 If you say Y here, you will have some control over the system even
>> 1164 if the system crashes for example during kernel debugging (e.g., you
>> 1165 will be able to flush the buffer cache to disk, reboot the system
>> 1166 immediately or dump some status information). This is accomplished
>> 1167 by pressing various keys while holding SysRq (Alt+PrintScreen). It
>> 1168 also works on a serial console (on PC hardware at least), if you
>> 1169 send a BREAK and then within 5 seconds a command keypress. The
>> 1170 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
>> 1171 unless you really know what this hack does.
>> 1172
>> 1173 config DEBUG_SPINLOCK
>> 1174 bool "Spinlock debugging"
>> 1175 depends on DEBUG_KERNEL
>> 1176 help
>> 1177 Say Y here and build SMP to catch missing spinlock initialization
>> 1178 and certain other kinds of spinlock errors commonly made. This is
>> 1179 best used in conjunction with the NMI watchdog so that spinlock
>> 1180 deadlocks are also debuggable.
>> 1181
>> 1182 config DEBUG_PAGEALLOC
>> 1183 bool "Page alloc debugging"
>> 1184 depends on DEBUG_KERNEL
>> 1185 help
>> 1186 Unmap pages from the kernel linear mapping after free_pages().
>> 1187 This results in a large slowdown, but helps to find certain types
>> 1188 of memory corruptions.
>> 1189
>> 1190 config DEBUG_HIGHMEM
>> 1191 bool "Highmem debugging"
>> 1192 depends on DEBUG_KERNEL && HIGHMEM
>> 1193 help
>> 1194 This options enables addition error checking for high memory systems.
>> 1195 Disable for production systems.
>> 1196
>> 1197 config DEBUG_INFO
>> 1198 bool "Compile the kernel with debug info"
>> 1199 depends on DEBUG_KERNEL
>> 1200 help
>> 1201 If you say Y here the resulting kernel image will include
>> 1202 debugging info resulting in a larger kernel image.
>> 1203 Say Y here only if you plan to use gdb to debug the kernel.
>> 1204 If you don't debug the kernel, you can say N.
>> 1205
>> 1206 config DEBUG_SPINLOCK_SLEEP
>> 1207 bool "Sleep-inside-spinlock checking"
535 help 1208 help
536 Compiles the kernel with DWARF unwin !! 1209 If you say Y here, various routines which may sleep will become very
537 to get stack backtraces. !! 1210 noisy if they are called with a spinlock held.
538 1211
>> 1212 config FRAME_POINTER
>> 1213 bool "Compile the kernel with frame pointers"
>> 1214 help
539 If you say Y here the resulting kern 1215 If you say Y here the resulting kernel image will be slightly larger
540 but not slower, and it will give ver !! 1216 and slower, but it will give very useful debugging information.
541 If you don't debug the kernel, you c 1217 If you don't debug the kernel, you can say N, but we may not be able
542 to solve problems without frame unwi !! 1218 to solve problems without frame pointers.
543 1219
544 config ARC_DBG_JUMP_LABEL !! 1220 config X86_EXTRA_IRQS
545 bool "Paranoid checks in Static Keys ( !! 1221 bool
546 depends on JUMP_LABEL !! 1222 depends on X86_LOCAL_APIC || X86_VOYAGER
547 default y if STATIC_KEYS_SELFTEST !! 1223 default y
548 help <<
549 Enable paranoid checks and self-test <<
550 part of static keys (jump labels) re <<
551 endif <<
552 1224
553 config ARC_BUILTIN_DTB_NAME !! 1225 config X86_FIND_SMP_CONFIG
554 string "Built in DTB" !! 1226 bool
555 help !! 1227 depends on X86_LOCAL_APIC || X86_VOYAGER
556 Set the name of the DTB to embed in !! 1228 default y
557 Leaving it blank selects the "nsim_7 <<
558 1229
559 endmenu # "ARC Architecture Configuration" !! 1230 config X86_MPPARSE
>> 1231 bool
>> 1232 depends on X86_LOCAL_APIC && !X86_VISWS
>> 1233 default y
560 1234
561 config ARCH_FORCE_MAX_ORDER !! 1235 endmenu
562 int "Maximum zone order" <<
563 default "11" if ARC_HUGEPAGE_16M <<
564 default "10" <<
565 1236
566 source "kernel/power/Kconfig" !! 1237 source "security/Kconfig"
>> 1238
>> 1239 source "crypto/Kconfig"
>> 1240
>> 1241 source "lib/Kconfig"
>> 1242
>> 1243 config X86_SMP
>> 1244 bool
>> 1245 depends on SMP && !X86_VOYAGER
>> 1246 default y
>> 1247
>> 1248 config X86_HT
>> 1249 bool
>> 1250 depends on SMP && !(X86_VISWS || X86_VOYAGER)
>> 1251 default y
>> 1252
>> 1253 config X86_BIOS_REBOOT
>> 1254 bool
>> 1255 depends on !(X86_VISWS || X86_VOYAGER)
>> 1256 default y
>> 1257
>> 1258 config X86_TRAMPOLINE
>> 1259 bool
>> 1260 depends on SMP || X86_VISWS
>> 1261 default y
>> 1262
>> 1263 config PC
>> 1264 bool
>> 1265 depends on X86 && !EMBEDDED
>> 1266 default y
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