2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
32 # 9 = 512 pages 8 = 256 pages 7 = 128 pages
33 config FORCE_MAX_ZONEORDER
41 config RWSEM_GENERIC_SPINLOCK
45 config RWSEM_XCHGADD_ALGORITHM
48 config GENERIC_BUST_SPINLOCK
51 config GENERIC_ISA_DMA
59 comment "Archimedes/A5000 Implementations (select only ONE)"
64 Say Y to support the Acorn Archimedes.
66 The Acorn Archimedes was an personal computer based on an 8MHz ARM2
67 processor, released in 1987. It supported up to 16MB of RAM in
68 later models and floppy, harddisc, ethernet etc.
73 Say Y here to to support the Acorn A5000.
76 internal IDE disk and CD-ROM interface, serial and parallel port,
77 and the floppy drive. Note that on some A5000s the floppy is
78 plugged into the wrong socket on the motherboard.
81 bool "2MB physical memory (broken)"
83 Say Y here if your Archimedes or A5000 system has only 2MB of
84 memory, otherwise say N. The resulting kernel will not run on a
85 machine with 4MB of memory.
90 # Compressed boot loader in ROM. Yes, we really want to ask about
91 # TEXT and BSS so we preserve their values in the config files.
93 bool "Compressed boot loader in ROM/flash"
95 Say Y here if you intend to execute your compressed kernel image (zImage)
96 directly from ROM or flash. If unsure, say N.
100 hex "Compressed ROM boot loader base address"
103 The base address for zImage. Unless you have special requirements, you
104 should not change this value.
108 hex "Compressed ROM boot loader BSS address"
111 The base address of 64KiB of read/write memory, which must be available
112 while the decompressor is running. Unless you have special requirements,
113 you should not change this value.
116 bool "Execute In Place (XIP) kernel image"
118 Select this option to create a kernel that can be programed into
121 comment "At least one math emulation must be selected"
124 tristate "NWFPE math emulation"
126 Say Y to include the NWFPE floating point emulator in the kernel.
127 This is necessary to run most binaries. Linux does not currently
128 support floating point hardware so you need to say Y here even if
129 your machine has an FPA or floating point co-processor podule.
131 It is also possible to say M to build the emulator as a module
132 (nwfpe) or indeed to leave it out altogether. However, unless you
133 know what you are doing this can easily render your machine
134 unbootable. Saying Y is the safe option.
136 You may say N here if you are going to load the Acorn FPEmulator
139 source "fs/Kconfig.binfmt"
142 bool "Preemptible Kernel (EXPERIMENTAL)"
143 depends on CPU_32 && EXPERIMENTAL
145 This option reduces the latency of the kernel when reacting to
146 real-time or interactive events by allowing a low priority process to
147 be preempted even if it is in kernel mode executing a system call.
148 This allows applications to run more reliably even when the system is
151 Say Y here if you are building a kernel for a desktop, embedded
152 or real-time system. Say N if you are unsure.
155 tristate "RISC OS personality"
158 Say Y here to include the kernel code necessary if you want to run
159 Acorn RISC OS/Arthur binaries under Linux. This code is still very
160 experimental; if this sounds frightening, say N and sleep in peace.
161 You can also say M here to compile this support as a module (which
162 will be called arthur).
165 string "Default kernel command string"
168 On some architectures (EBSA110 and CATS), there is currently no way
169 for the boot loader to pass arguments to the kernel. For these
170 architectures, you should supply some command-line options at build
171 time by entering them here. As a minimum, you should specify the
172 memory size and the root device (e.g., mem=64M root=/dev/nfs).
176 source "drivers/base/Kconfig"
178 source "drivers/parport/Kconfig"
180 source "drivers/pnp/Kconfig"
182 source "drivers/block/Kconfig"
184 source "drivers/md/Kconfig"
188 source "drivers/ide/Kconfig"
190 source "drivers/scsi/Kconfig"
192 source "drivers/isdn/Kconfig"
195 # input before char - char/joystick depends on it. As does USB.
197 source "drivers/input/Kconfig"
199 source "drivers/char/Kconfig"
201 source "drivers/media/Kconfig"
205 source "drivers/video/Kconfig"
209 source "sound/Kconfig"
213 source "drivers/misc/Kconfig"
215 source "drivers/usb/Kconfig"
217 menu "Kernel hacking"
219 # RMK wants arm kernels compiled with frame pointers so hardwire this to y.
220 # If you know what you are doing and are willing to live without stack
221 # traces, you can get a slightly smaller kernel by setting this option to
222 # n, but then RMK will have to kill you ;).
227 If you say N here, the resulting kernel will be slightly smaller and
228 faster. However, when a problem occurs with the kernel, the
229 information that is reported is severely limited. Most people
233 bool "Verbose user fault messages"
235 When a user program crashes due to an exception, the kernel can
236 print a brief message explaining what the problem was. This is
237 sometimes helpful for debugging but serves no purpose on a
238 production system. Most people should say N here.
241 bool "Include GDB debugging information in kernel binary"
243 Say Y here to include source-level debugging information in the
244 `vmlinux' binary image. This is handy if you want to use gdb or
245 addr2line to debug the kernel. It has no impact on the in-memory
246 footprint of the running kernel but it can increase the amount of
247 time and disk space needed for compilation of the kernel. If in
251 bool "Kernel debugging"
253 Say Y here if you are developing drivers or trying to debug and
254 identify kernel problems.
257 bool "Debug memory allocations"
258 depends on DEBUG_KERNEL
260 Say Y here to have the kernel do limited verification on memory
261 allocation as well as poisoning memory on free to catch use of freed
265 bool "Magic SysRq key"
266 depends on DEBUG_KERNEL
268 If you say Y here, you will have some control over the system even
269 if the system crashes for example during kernel debugging (e.g., you
270 will be able to flush the buffer cache to disk, reboot the system
271 immediately or dump some status information). This is accomplished
272 by pressing various keys while holding SysRq (Alt+PrintScreen). It
273 also works on a serial console (on PC hardware at least), if you
274 send a BREAK and then within 5 seconds a command keypress. The
275 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
276 unless you really know what this hack does.
278 config DEBUG_SPINLOCK
279 bool "Spinlock debugging"
280 depends on DEBUG_KERNEL
282 Say Y here and build SMP to catch missing spinlock initialization
283 and certain other kinds of spinlock errors commonly made. This is
284 best used in conjunction with the NMI watchdog so that spinlock
285 deadlocks are also debuggable.
288 bool "Wait queue debugging"
289 depends on DEBUG_KERNEL
291 config DEBUG_BUGVERBOSE
292 bool "Verbose BUG() reporting (adds 70K)"
293 depends on DEBUG_KERNEL
295 Say Y here to make BUG() panics output the file name and line number
296 of the BUG call as well as the EIP and oops trace. This aids
297 debugging but costs about 70-100K of memory.
300 bool "Verbose kernel error messages"
301 depends on DEBUG_KERNEL
303 This option controls verbose debugging information which can be
304 printed when the kernel detects an internal error. This debugging
305 information is useful to kernel hackers when tracking down problems,
306 but mostly meaningless to other people. It's safe to say Y unless
307 you are concerned with the code size or don't want to see these
311 bool "Compile the kernel with debug info"
312 depends on DEBUG_KERNEL
314 If you say Y here the resulting kernel image will include
315 debugging info resulting in a larger kernel image.
316 Say Y here only if you plan to use gdb to debug the kernel.
317 If you don't debug the kernel, you can say N.
319 # These options are only for real kernel hackers who want to get their hands dirty.
321 bool "Kernel low-level debugging functions"
322 depends on DEBUG_KERNEL
324 Say Y here to include definitions of printascii, printchar, printhex
325 in the kernel. This is helpful if you are debugging code that
326 executes before the console is initialized.
330 source "kernel/vserver/Kconfig"
332 source "security/Kconfig"
334 source "crypto/Kconfig"