1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 !! 2 config ALPHA
3 menu "UML-specific options" <<
4 <<
5 config UML <<
6 bool 3 bool
7 default y 4 default y
8 select ARCH_HAS_CPU_FINALIZE_INIT !! 5 select ARCH_32BIT_USTAT_F_TINODE
9 select ARCH_HAS_FORTIFY_SOURCE !! 6 select ARCH_HAS_CURRENT_STACK_POINTER
10 select ARCH_HAS_GCOV_PROFILE_ALL !! 7 select ARCH_HAS_DMA_OPS if PCI
11 select ARCH_HAS_KCOV !! 8 select ARCH_MIGHT_HAVE_PC_PARPORT
12 select ARCH_HAS_STRNCPY_FROM_USER !! 9 select ARCH_MIGHT_HAVE_PC_SERIO
13 select ARCH_HAS_STRNLEN_USER !! 10 select ARCH_NO_PREEMPT
14 select HAVE_ARCH_AUDITSYSCALL !! 11 select ARCH_NO_SG_CHAIN
15 select HAVE_ARCH_KASAN if X86_64 !! 12 select ARCH_USE_CMPXCHG_LOCKREF
16 select HAVE_ARCH_KASAN_VMALLOC if HAVE !! 13 select FORCE_PCI
17 select HAVE_ARCH_SECCOMP_FILTER !! 14 select PCI_DOMAINS if PCI
>> 15 select PCI_SYSCALL if PCI
18 select HAVE_ASM_MODVERSIONS 16 select HAVE_ASM_MODVERSIONS
19 select HAVE_UID16 !! 17 select HAVE_PAGE_SIZE_8KB
20 select HAVE_DEBUG_KMEMLEAK !! 18 select HAVE_PCSPKR_PLATFORM
21 select HAVE_DEBUG_BUGVERBOSE !! 19 select HAVE_PERF_EVENTS
22 select HAVE_PAGE_SIZE_4KB !! 20 select NEED_DMA_MAP_STATE
23 select NO_DMA if !UML_DMA_EMULATION !! 21 select NEED_SG_DMA_LENGTH
24 select OF_EARLY_FLATTREE if OF !! 22 select GENERIC_IRQ_PROBE
>> 23 select GENERIC_PCI_IOMAP
>> 24 select AUTO_IRQ_AFFINITY if SMP
25 select GENERIC_IRQ_SHOW 25 select GENERIC_IRQ_SHOW
26 select GENERIC_CPU_DEVICES !! 26 select ARCH_WANT_IPC_PARSE_VERSION
27 select HAVE_GCC_PLUGINS !! 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
28 select ARCH_SUPPORTS_LTO_CLANG !! 28 select AUDIT_ARCH
29 select ARCH_SUPPORTS_LTO_CLANG_THIN !! 29 select GENERIC_CPU_VULNERABILITIES
30 select TRACE_IRQFLAGS_SUPPORT !! 30 select GENERIC_SMP_IDLE_THREAD
31 select TTY # Needed for line.c !! 31 select HAS_IOPORT
32 select HAVE_ARCH_VMAP_STACK !! 32 select HAVE_ARCH_AUDITSYSCALL
33 select HAVE_RUST !! 33 select HAVE_MOD_ARCH_SPECIFIC
34 select ARCH_HAS_UBSAN !! 34 select LOCK_MM_AND_FIND_VMA
>> 35 select MODULES_USE_ELF_RELA
>> 36 select ODD_RT_SIGACTION
>> 37 select OLD_SIGSUSPEND
>> 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
>> 39 select MMU_GATHER_NO_RANGE
>> 40 select SPARSEMEM_EXTREME if SPARSEMEM
>> 41 select ZONE_DMA
>> 42 help
>> 43 The Alpha is a 64-bit general-purpose processor designed and
>> 44 marketed by the Digital Equipment Corporation of blessed memory,
>> 45 now Hewlett-Packard. The Alpha Linux project has a home page at
>> 46 <http://www.alphalinux.org/>.
>> 47
>> 48 config 64BIT
>> 49 def_bool y
35 50
36 config MMU 51 config MMU
37 bool 52 bool
38 default y 53 default y
39 54
40 config UML_DMA_EMULATION !! 55 config ARCH_HAS_ILOG2_U32
>> 56 bool
>> 57 default n
>> 58
>> 59 config ARCH_HAS_ILOG2_U64
41 bool 60 bool
>> 61 default n
42 62
43 config NO_IOMEM !! 63 config GENERIC_CALIBRATE_DELAY
44 bool "disable IOMEM" if EXPERT !! 64 bool
45 depends on !INDIRECT_IOMEM <<
46 default y 65 default y
47 66
48 config UML_IOMEM_EMULATION !! 67 config GENERIC_ISA_DMA
49 bool 68 bool
50 select INDIRECT_IOMEM !! 69 default y
51 select HAS_IOPORT <<
52 select GENERIC_PCI_IOMAP <<
53 select GENERIC_IOMAP <<
54 select NO_GENERIC_PCI_IOPORT_MAP <<
55 70
56 config NO_IOPORT_MAP !! 71 config PGTABLE_LEVELS
57 def_bool !UML_IOMEM_EMULATION !! 72 int
>> 73 default 3
58 74
59 config ISA !! 75 config AUDIT_ARCH
60 bool 76 bool
61 77
62 config SBUS !! 78 menu "System setup"
63 bool !! 79
>> 80 choice
>> 81 prompt "Alpha system type"
>> 82 default ALPHA_GENERIC
>> 83 help
>> 84 This is the system type of your hardware. A "generic" kernel will
>> 85 run on any supported Alpha system. However, if you configure a
>> 86 kernel for your specific system, it will be faster and smaller.
>> 87
>> 88 To find out what type of Alpha system you have, you may want to
>> 89 check out the Linux/Alpha FAQ, accessible on the WWW from
>> 90 <http://www.alphalinux.org/>. In summary:
>> 91
>> 92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
>> 93 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
>> 94 LX164 AlphaPC164-LX
>> 95 Miata Personal Workstation 433/500/600 a/au
>> 96 Marvel AlphaServer ES47 / ES80 / GS1280
>> 97 Mikasa AS 1000
>> 98 Noritake AS 1000A, AS 600A, AS 800
>> 99 PC164 AlphaPC164
>> 100 Rawhide AS 1200, AS 4000, AS 4100
>> 101 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 102 SX164 AlphaPC164-SX
>> 103 Sable AS 2000, AS 2100
>> 104 Shark DS 20L
>> 105 Takara Takara (OEM)
>> 106 Titan AlphaServer ES45 / DS25 / DS15
>> 107 Wildfire AlphaServer GS 40/80/160/320
>> 108
>> 109 If you don't know what to do, choose "generic".
>> 110
>> 111 config ALPHA_GENERIC
>> 112 bool "Generic"
>> 113 depends on TTY
>> 114 select HAVE_EISA
>> 115 help
>> 116 A generic kernel will run on all supported Alpha hardware.
>> 117
>> 118 config ALPHA_ALCOR
>> 119 bool "Alcor/Alpha-XLT"
>> 120 select HAVE_EISA
>> 121 help
>> 122 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
>> 123 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
>> 124 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
>> 125 controller (256-bit memory bus) and a PCI interface. It also does
>> 126 all the work required to support an external Bcache and to maintain
>> 127 memory coherence when a PCI device DMAs into (or out of) memory.
>> 128
>> 129 config ALPHA_DP264
>> 130 bool "DP264"
>> 131 help
>> 132 Various 21264 systems with the tsunami core logic chipset.
>> 133 API Networks: 264DP, UP2000(+), CS20;
>> 134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
>> 135
>> 136 config ALPHA_EIGER
>> 137 bool "Eiger"
>> 138 help
>> 139 Apparently an obscure OEM single-board computer based on the
>> 140 Typhoon/Tsunami chipset family. Information on it is scanty.
>> 141
>> 142 config ALPHA_LX164
>> 143 bool "LX164"
>> 144 help
>> 145 A technical overview of this board is available at
>> 146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
>> 147
>> 148 config ALPHA_MARVEL
>> 149 bool "Marvel"
>> 150 help
>> 151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
>> 152
>> 153 config ALPHA_MIATA
>> 154 bool "Miata"
>> 155 select HAVE_EISA
>> 156 help
>> 157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 158 or 600au).
>> 159
>> 160 config ALPHA_MIKASA
>> 161 bool "Mikasa"
>> 162 help
>> 163 AlphaServer 1000-based Alpha systems.
>> 164
>> 165 config ALPHA_NAUTILUS
>> 166 bool "Nautilus"
>> 167 help
>> 168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
>> 169
>> 170 config ALPHA_NORITAKE
>> 171 bool "Noritake"
>> 172 select HAVE_EISA
>> 173 help
>> 174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 175 systems.
>> 176
>> 177 config ALPHA_PC164
>> 178 bool "PC164"
>> 179
>> 180 config ALPHA_RAWHIDE
>> 181 bool "Rawhide"
>> 182 select HAVE_EISA
>> 183 help
>> 184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
>> 185 See HOWTO at
>> 186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
>> 187
>> 188 config ALPHA_RUFFIAN
>> 189 bool "Ruffian"
>> 190 help
>> 191 Samsung APC164UX. There is a page on known problems and workarounds
>> 192 at <http://www.alphalinux.org/faq/FAQ-11.html>.
>> 193
>> 194 config ALPHA_RX164
>> 195 bool "RX164"
>> 196
>> 197 config ALPHA_SX164
>> 198 bool "SX164"
>> 199
>> 200 config ALPHA_SABLE
>> 201 bool "Sable"
>> 202 select HAVE_EISA
>> 203 help
>> 204 Digital AlphaServer 2000 and 2100-based systems.
>> 205
>> 206 config ALPHA_SHARK
>> 207 bool "Shark"
>> 208
>> 209 config ALPHA_TAKARA
>> 210 bool "Takara"
>> 211 help
>> 212 Alpha 11164-based OEM single-board computer.
>> 213
>> 214 config ALPHA_TITAN
>> 215 bool "Titan"
>> 216 help
>> 217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
>> 218
>> 219 config ALPHA_WILDFIRE
>> 220 bool "Wildfire"
>> 221 help
>> 222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
>> 223
>> 224 endchoice
64 225
65 config LOCKDEP_SUPPORT !! 226 # clear all implied options (don't want default values for those):
>> 227 # Most of these machines have ISA slots; not exactly sure which don't,
>> 228 # and this doesn't activate hordes of code, so do it always.
>> 229 config ISA
66 bool 230 bool
67 default y 231 default y
>> 232 help
>> 233 Find out whether you have ISA slots on your motherboard. ISA is the
>> 234 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 235 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 237 newer boards don't support it. If you have ISA, say Y, otherwise N.
68 238
69 config STACKTRACE_SUPPORT !! 239 config ISA_DMA_API
70 bool 240 bool
71 default y 241 default y
72 select STACKTRACE <<
73 242
74 config GENERIC_CALIBRATE_DELAY !! 243 config ALPHA_CIA
75 bool 244 bool
>> 245 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR
76 default y 246 default y
77 247
78 config HZ !! 248 config ALPHA_EV56
79 int !! 249 bool
80 default 100 !! 250 default y if ALPHA_ALCOR || ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_RAWHIDE || ALPHA_SABLE
81 251
82 config NR_CPUS !! 252 config ALPHA_T2
83 int !! 253 bool
84 range 1 1 !! 254 depends on ALPHA_SABLE
85 default 1 !! 255 default y
86 256
87 config ARCH_HAS_CACHE_LINE_SIZE !! 257 config ALPHA_PYXIS
88 def_bool y !! 258 bool
>> 259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
>> 260 default y
89 261
90 source "arch/$(HEADER_ARCH)/um/Kconfig" !! 262 config ALPHA_EV6
>> 263 bool
>> 264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
>> 265 default y
91 266
92 config MAY_HAVE_RUNTIME_DEPS !! 267 config ALPHA_TSUNAMI
93 bool 268 bool
>> 269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
>> 270 default y
94 271
95 config STATIC_LINK !! 272 config ALPHA_EV67
96 bool "Force a static link" !! 273 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
97 depends on CC_CAN_LINK_STATIC_NO_RUNTI !! 274 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
98 help 275 help
99 This option gives you the ability to !! 276 Is this a machine based on the EV67 core? If in doubt, select N here
100 Normally, UML is linked as a shared !! 277 and the machine will be treated as an EV6.
101 use in a chroot jail. So, if you in <<
102 you probably want to say Y here. <<
103 Additionally, this option enables us <<
104 2.75G) for UML. <<
105 278
106 NOTE: This option is incompatible wi !! 279 config ALPHA_MCPCIA
107 depend on features that require bein !! 280 bool
>> 281 depends on ALPHA_RAWHIDE
>> 282 default y
>> 283
>> 284 config ALPHA_POLARIS
>> 285 bool
>> 286 depends on ALPHA_RX164
>> 287 default y
108 288
109 config LD_SCRIPT_STATIC !! 289 config ALPHA_IRONGATE
110 bool 290 bool
>> 291 depends on ALPHA_NAUTILUS
111 default y 292 default y
112 depends on STATIC_LINK <<
113 293
114 config LD_SCRIPT_DYN !! 294 config GENERIC_HWEIGHT
115 bool 295 bool
>> 296 default y if !ALPHA_EV67
>> 297
>> 298 config ALPHA_BROKEN_IRQ_MASK
>> 299 bool
>> 300 depends on ALPHA_GENERIC || ALPHA_PC164
116 default y 301 default y
117 depends on !LD_SCRIPT_STATIC <<
118 302
119 config LD_SCRIPT_DYN_RPATH !! 303 config VGA_HOSE
120 bool "set rpath in the binary" if EXPE !! 304 bool
>> 305 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
121 default y 306 default y
122 depends on LD_SCRIPT_DYN <<
123 help 307 help
124 Add /lib (and /lib64 for 64-bit) to !! 308 Support VGA on an arbitrary hose; needed for several platforms
125 explicitly. !! 309 which always have multiple hoses, and whose consoles support it.
126 310
127 You may need to turn this off if com <<
128 that have their libraries in random <<
129 might otherwise unexpected use libra <<
130 instead of the desired ones. <<
131 311
132 config HOSTFS !! 312 config ALPHA_QEMU
133 tristate "Host filesystem" !! 313 bool "Run under QEMU emulation"
>> 314 depends on !ALPHA_GENERIC
134 help 315 help
135 While the User-Mode Linux port uses !! 316 Assume the presence of special features supported by QEMU PALcode
136 booting and normal file access, this !! 317 that reduce the overhead of system emulation.
137 access files stored on the host. It <<
138 network connection between the Host <<
139 this might be: <<
140 318
141 mount none /tmp/fromhost -t hostfs - !! 319 Generic kernels will auto-detect QEMU. But when building a
>> 320 system-specific kernel, the assumption is that we want to
>> 321 eliminate as many runtime tests as possible.
142 322
143 where /tmp/fromhost is an empty dire !! 323 If unsure, say N.
144 /tmp/umlshare is a directory on the <<
145 wishes to access. <<
146 324
147 For more information, see <<
148 <http://user-mode-linux.sourceforge. <<
149 325
150 If you'd like to be able to work wit !! 326 config ALPHA_SRM
151 say Y or M here; otherwise say N. !! 327 bool "Use SRM as bootloader" if ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS
>> 328 depends on TTY
>> 329 default y if ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
>> 330 help
>> 331 There are two different types of booting firmware on Alphas: SRM,
>> 332 which is command line driven, and ARC, which uses menus and arrow
>> 333 keys. Details about the Linux/Alpha booting process are contained in
>> 334 the Linux/Alpha FAQ, accessible on the WWW from
>> 335 <http://www.alphalinux.org/>.
>> 336
>> 337 The usual way to load Linux on an Alpha machine is to use MILO
>> 338 (a bootloader that lets you pass command line parameters to the
>> 339 kernel just like lilo does for the x86 architecture) which can be
>> 340 loaded either from ARC or can be installed directly as a permanent
>> 341 firmware replacement from floppy (which requires changing a certain
>> 342 jumper on the motherboard). If you want to do either of these, say N
>> 343 here. If MILO doesn't work on your system (true for Jensen
>> 344 motherboards), you can bypass it altogether and boot Linux directly
>> 345 from an SRM console; say Y here in order to do that. Note that you
>> 346 won't be able to boot from an IDE disk using SRM.
152 347
153 config MCONSOLE !! 348 If unsure, say N.
154 bool "Management console" !! 349
155 depends on PROC_FS !! 350 config ARCH_MAY_HAVE_PC_FDC
156 default y !! 351 def_bool y
>> 352
>> 353 config SMP
>> 354 bool "Symmetric multi-processing support"
>> 355 depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
157 help 356 help
158 The user mode linux management conso !! 357 This enables support for systems with more than one CPU. If you have
159 the kernel, somewhat like the i386 S !! 358 a system with only one CPU, say N. If you have a system with more
160 a full-blown operating system runnin !! 359 than one CPU, say Y.
161 instance, there is much greater flex !! 360
162 SysRq mechanism. !! 361 If you say N here, the kernel will run on uni- and multiprocessor
163 !! 362 machines, but will use only one CPU of a multiprocessor machine. If
164 If you answer 'Y' to this option, to !! 363 you say Y here, the kernel will run on many, but not all,
165 mconsole client (called uml_mconsole !! 364 uniprocessor machines. On a uniprocessor machine, the kernel
166 2.4.5-9um and later (path /tools/mco !! 365 will run faster if you say N here.
167 distribution RPM package in 2.4.6 an !! 366
168 !! 367 See also the SMP-HOWTO available at
169 It is safe to say 'Y' here. !! 368 <https://www.tldp.org/docs.html#howto>.
170 !! 369
171 config MAGIC_SYSRQ !! 370 If you don't know what to do here, say N.
172 bool "Magic SysRq key" <<
173 depends on MCONSOLE <<
174 help <<
175 If you say Y here, you will have som <<
176 if the system crashes for example du <<
177 will be able to flush the buffer cac <<
178 immediately or dump some status info <<
179 possible requests is provided. <<
180 <<
181 This is the feature normally accompl <<
182 while holding SysRq (Alt+PrintScreen <<
183 <<
184 On UML, this is accomplished by send <<
185 mconsole, followed by the letter for <<
186 <<
187 The keys are documented in <file:Doc <<
188 unless you really know what this hac <<
189 <<
190 config KERNEL_STACK_ORDER <<
191 int "Kernel stack size order" <<
192 default 2 if 64BIT <<
193 range 2 10 if 64BIT <<
194 default 1 if !64BIT <<
195 help <<
196 This option determines the size of U <<
197 be 1 << order pages. The default is <<
198 on UML, in which case, set this to 3 <<
199 It is possible to reduce the stack t <<
200 older (pre-2017) CPUs. It is not rec <<
201 increase in the size of the state wh <<
202 signals. <<
203 371
204 config MMAPPER !! 372 config NR_CPUS
205 tristate "iomem emulation driver" !! 373 int "Maximum number of CPUs (2-32)"
>> 374 range 2 32
>> 375 depends on SMP
>> 376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
>> 377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
206 help 378 help
207 This driver allows a host file to be !! 379 MARVEL support can handle a maximum of 32 CPUs, all the others
208 UML. !! 380 with working support have a maximum of 4 CPUs.
209 381
210 config PGTABLE_LEVELS !! 382 config ARCH_SPARSEMEM_ENABLE
211 int !! 383 bool "Sparse Memory Support"
212 default 3 if 3_LEVEL_PGTABLES !! 384 help
213 default 2 !! 385 Say Y to support efficient handling of discontiguous physical memory,
>> 386 for systems that have huge holes in the physical address space.
214 387
215 config UML_TIME_TRAVEL_SUPPORT !! 388 config ALPHA_WTINT
216 bool !! 389 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
217 prompt "Support time-travel mode (e.g. !! 390 default y if ALPHA_QEMU
218 # inf-cpu mode is incompatible with th !! 391 default n if ALPHA_EV56
219 depends on !RAID6_PQ_BENCHMARK !! 392 default n if !ALPHA_SRM && !ALPHA_GENERIC
220 depends on !SMP !! 393 default y if SMP
221 help !! 394 help
222 Enable this option to support time t !! 395 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
223 !! 396 to sleep until the next interrupt. This may reduce the power
224 After enabling this option, two mode !! 397 consumed, and the heat produced by the computer. However, it has
225 (selected by the kernel command line !! 398 the side effect of making the cycle counter unreliable as a timing
226 line help for more details. !! 399 device across the sleep.
227 <<
228 It is safe to say Y, but you probabl <<
229 <<
230 config KASAN_SHADOW_OFFSET <<
231 hex <<
232 depends on KASAN <<
233 default 0x100000000000 <<
234 help <<
235 This is the offset at which the ~16T <<
236 mapped and used by KASAN for memory <<
237 address that has at least KASAN_SHAD <<
238 by 8) amount of space so that the KA <<
239 with anything. The default is 0x1000 <<
240 set to a large value. On low-memory <<
241 into the immediate of most instructi <<
242 400
243 endmenu !! 401 For emulation under QEMU, definitely say Y here, as we have other
>> 402 mechanisms for measuring time than the cycle counter.
244 403
245 source "arch/um/drivers/Kconfig" !! 404 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
>> 405 MILO, sleep mode is not supported so you might as well say N here.
246 406
247 config ARCH_SUSPEND_POSSIBLE !! 407 For SMP systems we cannot use the cycle counter for timing anyway,
248 def_bool y !! 408 so you might as well say Y here.
>> 409
>> 410 If unsure, say N.
>> 411
>> 412 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 413 config ALPHA_LARGE_VMALLOC
>> 414 bool
>> 415 help
>> 416 Process creation and other aspects of virtual memory management can
>> 417 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 418 allocations. This equates to about 8GB.
>> 419
>> 420 Under normal circumstances, this is so far and above what is needed
>> 421 as to be laughable. However, there are certain applications (such
>> 422 as benchmark-grade in-kernel web serving) that can make use of as
>> 423 much vmalloc space as is available.
>> 424
>> 425 Say N unless you know you need gobs and gobs of vmalloc space.
>> 426
>> 427 config VERBOSE_MCHECK
>> 428 bool "Verbose Machine Checks"
>> 429
>> 430 config VERBOSE_MCHECK_ON
>> 431 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 432 depends on VERBOSE_MCHECK
>> 433 default 1
>> 434 help
>> 435 This option allows the default printing mode to be set, and then
>> 436 possibly overridden by a boot command argument.
>> 437
>> 438 For example, if one wanted the option of printing verbose
>> 439 machine checks, but wanted the default to be as if verbose
>> 440 machine check printing was turned off, then one would choose
>> 441 the printing mode to be 0. Then, upon reboot, one could add
>> 442 the boot command line "verbose_mcheck=1" to get the normal
>> 443 verbose machine check printing, or "verbose_mcheck=2" to get
>> 444 the maximum information available.
>> 445
>> 446 Take the default (1) unless you want more control or more info.
>> 447
>> 448 choice
>> 449 prompt "Timer interrupt frequency (HZ)?"
>> 450 default HZ_128 if ALPHA_QEMU
>> 451 default HZ_1200 if ALPHA_RAWHIDE
>> 452 default HZ_1024
>> 453 help
>> 454 The frequency at which timer interrupts occur. A high frequency
>> 455 minimizes latency, whereas a low frequency minimizes overhead of
>> 456 process accounting. The later effect is especially significant
>> 457 when being run under QEMU.
>> 458
>> 459 Note that some Alpha hardware cannot change the interrupt frequency
>> 460 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
>> 461
>> 462 config HZ_32
>> 463 bool "32 Hz"
>> 464 config HZ_64
>> 465 bool "64 Hz"
>> 466 config HZ_128
>> 467 bool "128 Hz"
>> 468 config HZ_256
>> 469 bool "256 Hz"
>> 470 config HZ_1024
>> 471 bool "1024 Hz"
>> 472 config HZ_1200
>> 473 bool "1200 Hz"
>> 474 endchoice
>> 475
>> 476 config HZ
>> 477 int
>> 478 default 32 if HZ_32
>> 479 default 64 if HZ_64
>> 480 default 128 if HZ_128
>> 481 default 256 if HZ_256
>> 482 default 1200 if HZ_1200
>> 483 default 1024
249 484
250 menu "Power management options" !! 485 config SRM_ENV
>> 486 tristate "SRM environment through procfs"
>> 487 depends on PROC_FS
>> 488 help
>> 489 If you enable this option, a subdirectory inside /proc called
>> 490 /proc/srm_environment will give you access to the all important
>> 491 SRM environment variables (those which have a name) and also
>> 492 to all others (by their internal number).
>> 493
>> 494 SRM is something like a BIOS for Alpha machines. There are some
>> 495 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 496 support (hey, that's not SRM!).
>> 497
>> 498 Despite the fact that this driver doesn't work on all Alphas (but
>> 499 only on those which have SRM as their firmware), it's save to
>> 500 build it even if your particular machine doesn't know about SRM
>> 501 (or if you intend to compile a generic kernel). It will simply
>> 502 not create those subdirectory in /proc (and give you some warning,
>> 503 of course).
251 504
252 source "kernel/power/Kconfig" !! 505 This driver is also available as a module and will be called
>> 506 srm_env then.
253 507
254 endmenu 508 endmenu
>> 509
>> 510 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
>> 511 # but we also need it if VGA_HOSE is set
>> 512 config DUMMY_CONSOLE
>> 513 bool
>> 514 depends on VGA_HOSE
>> 515 default y
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