2 bool "Virtual terminal" if EXPERT
3 depends on !S390 && !UML
7 If you say Y here, you will get support for terminal devices with
8 display and keyboard devices. These are called "virtual" because you
9 can run several virtual terminals (also called virtual consoles) on
10 one physical terminal. This is rather useful, for example one
11 virtual terminal can collect system messages and warnings, another
12 one can be used for a text-mode user session, and a third could run
13 an X session, all in parallel. Switching between virtual terminals
14 is done with certain key combinations, usually Alt-<function key>.
16 The setterm command ("man setterm") can be used to change the
17 properties (such as colors or beeping) of a virtual terminal. The
18 man page console_codes(4) ("man console_codes") contains the special
19 character sequences that can be used to change those properties
20 directly. The fonts used on virtual terminals can be changed with
21 the setfont ("man setfont") command and the key bindings are defined
22 with the loadkeys ("man loadkeys") command.
24 You need at least one virtual terminal device in order to make use
25 of your keyboard and monitor. Therefore, only people configuring an
26 embedded system would want to say N here in order to save some
27 memory; the only way to log into such a system is then via a serial
28 or network connection.
30 If unsure, say Y, or else you won't be able to do much with your new
31 shiny Linux system :-)
33 config CONSOLE_TRANSLATIONS
36 bool "Enable character translations in console" if EXPERT
38 This enables support for font mapping and Unicode translation
42 bool "Support for console on virtual terminal" if EXPERT
46 The system console is the device which receives all kernel messages
47 and warnings and which allows logins in single user mode. If you
48 answer Y here, a virtual terminal (the device used to interact with
49 a physical terminal) can be used as system console. This is the most
50 common mode of operations, so you should say Y here unless you want
51 the kernel messages be output only to a serial port (in which case
52 you should say Y to "Console on serial port", below).
54 If you do say Y here, by default the currently visible virtual
55 terminal (/dev/tty0) will be used as system console. You can change
56 that with a kernel command line option such as "console=tty3" which
57 would use the third virtual terminal as system console. (Try "man
58 bootparam" or see the documentation of your boot loader (lilo or
59 loadlin) about how to pass options to the kernel at boot time.)
63 config VT_CONSOLE_SLEEP
65 depends on VT_CONSOLE && PM_SLEEP
68 bool "Colored kernel message output"
71 This option enables kernel messages to be emitted in
72 colors other than the default.
74 The color value you need to enter is composed (OR-ed)
75 of a foreground and a background color.
78 0x00 = black, 0x08 = dark gray,
79 0x01 = red, 0x09 = light red,
80 0x02 = green, 0x0A = light green,
81 0x03 = brown, 0x0B = yellow,
82 0x04 = blue, 0x0C = light blue,
83 0x05 = magenta, 0x0D = light magenta,
84 0x06 = cyan, 0x0E = light cyan,
85 0x07 = gray, 0x0F = white,
87 (Foreground colors 0x08 to 0x0F do not work when a VGA
88 console font with 512 glyphs is used.)
91 0x00 = black, 0x40 = blue,
92 0x10 = red, 0x50 = magenta,
93 0x20 = green, 0x60 = cyan,
94 0x30 = brown, 0x70 = gray,
96 For example, 0x1F would yield white on red.
100 config VT_PRINTK_EMERG_COLOR
101 hex "Emergency messages color"
106 This option defines with which color kernel emergency messages will
107 be printed to the console.
109 config VT_PRINTK_ALERT_COLOR
110 hex "Alert messages color"
115 This option defines with which color kernel alert messages will
116 be printed to the console.
118 config VT_PRINTK_CRIT_COLOR
119 hex "Critical messages color"
124 This option defines with which color kernel critical messages will
125 be printed to the console.
127 config VT_PRINTK_ERR_COLOR
128 hex "Error messages color"
133 This option defines with which color kernel error messages will
134 be printed to the console.
136 config VT_PRINTK_WARNING_COLOR
137 hex "Warning messages color"
142 This option defines with which color kernel warning messages will
143 be printed to the console.
145 config VT_PRINTK_NOTICE_COLOR
146 hex "Notice messages color"
151 This option defines with which color kernel notice messages will
152 be printed to the console.
154 config VT_PRINTK_INFO_COLOR
155 hex "Information messages color"
160 This option defines with which color kernel information messages will
161 be printed to the console.
163 config VT_PRINTK_DEBUG_COLOR
164 hex "Debug messages color"
169 This option defines with which color kernel debug messages will
170 be printed to the console.
174 depends on VT && !UML
177 config VT_HW_CONSOLE_BINDING
178 bool "Support for binding and unbinding console drivers"
179 depends on HW_CONSOLE
182 The virtual terminal is the device that interacts with the physical
183 terminal through console drivers. On these systems, at least one
184 console driver is loaded. In other configurations, additional console
185 drivers may be enabled, such as the framebuffer console. If more than
186 1 console driver is enabled, setting this to 'y' will allow you to
187 select the console driver that will serve as the backend for the
190 See <file:Documentation/console/console.txt> for more
191 information. For framebuffer console users, please refer to
192 <file:Documentation/fb/fbcon.txt>.
195 bool "Unix98 PTY support" if EXPERT
198 A pseudo terminal (PTY) is a software device consisting of two
199 halves: a master and a slave. The slave device behaves identical to
200 a physical terminal; the master device is used by a process to
201 read data from and write data to the slave, thereby emulating a
202 terminal. Typical programs for the master side are telnet servers
205 Linux has traditionally used the BSD-like names /dev/ptyxx for
206 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
207 has a number of problems. The GNU C library glibc 2.1 and later,
208 however, supports the Unix98 naming standard: in order to acquire a
209 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
210 terminal is then made available to the process and the pseudo
211 terminal slave can be accessed as /dev/pts/<number>. What was
212 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
214 All modern Linux systems use the Unix98 ptys. Say Y unless
215 you're on an embedded system and want to conserve memory.
217 config DEVPTS_MULTIPLE_INSTANCES
218 bool "Support multiple instances of devpts"
219 depends on UNIX98_PTYS
222 Enable support for multiple instances of devpts filesystem.
223 If you want to have isolated PTY namespaces (eg: in containers),
224 say Y here. Otherwise, say N. If enabled, each mount of devpts
225 filesystem with the '-o newinstance' option will create an
226 independent PTY namespace.
229 bool "Legacy (BSD) PTY support"
232 A pseudo terminal (PTY) is a software device consisting of two
233 halves: a master and a slave. The slave device behaves identical to
234 a physical terminal; the master device is used by a process to
235 read data from and write data to the slave, thereby emulating a
236 terminal. Typical programs for the master side are telnet servers
239 Linux has traditionally used the BSD-like names /dev/ptyxx
240 for masters and /dev/ttyxx for slaves of pseudo
241 terminals. This scheme has a number of problems, including
242 security. This option enables these legacy devices; on most
243 systems, it is safe to say N.
246 config LEGACY_PTY_COUNT
247 int "Maximum number of legacy PTY in use"
248 depends on LEGACY_PTYS
252 The maximum number of legacy PTYs that can be used at any one time.
253 The default is 256, and should be more than enough. Embedded
254 systems may want to reduce this to save memory.
256 When not in use, each legacy PTY occupies 12 bytes on 32-bit
257 architectures and 24 bytes on 64-bit architectures.
259 config BFIN_JTAG_COMM
260 tristate "Blackfin JTAG Communication"
263 Add support for emulating a TTY device over the Blackfin JTAG.
265 To compile this driver as a module, choose M here: the
266 module will be called bfin_jtag_comm.
268 config BFIN_JTAG_COMM_CONSOLE
269 bool "Console on Blackfin JTAG"
270 depends on BFIN_JTAG_COMM=y
272 config SERIAL_NONSTANDARD
273 bool "Non-standard serial port support"
276 Say Y here if you have any non-standard serial boards -- boards
277 which aren't supported using the standard "dumb" serial driver.
278 This includes intelligent serial boards such as Cyclades,
279 Digiboards, etc. These are usually used for systems that need many
280 serial ports because they serve many terminals or dial-in
283 Note that the answer to this question won't directly affect the
284 kernel: saying N will just cause the configurator to skip all
285 the questions about non-standard serial boards.
287 Most people can say N here.
290 tristate "Comtrol RocketPort support"
291 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
293 This driver supports Comtrol RocketPort and RocketModem PCI boards.
294 These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
295 modems. For information about the RocketPort/RocketModem boards
296 and this driver read <file:Documentation/serial/rocket.txt>.
298 To compile this driver as a module, choose M here: the
299 module will be called rocket.
301 If you want to compile this driver into the kernel, say Y here. If
302 you don't have a Comtrol RocketPort/RocketModem card installed, say N.
305 tristate "Cyclades async mux support"
306 depends on SERIAL_NONSTANDARD && (PCI || ISA)
309 This driver supports Cyclades Z and Y multiserial boards.
310 You would need something like this to connect more than two modems to
311 your Linux box, for instance in order to become a dial-in server.
313 For information about the Cyclades-Z card, read
314 <file:Documentation/serial/README.cycladesZ>.
316 To compile this driver as a module, choose M here: the
317 module will be called cyclades.
319 If you haven't heard about it, it's safe to say N.
322 bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
323 depends on EXPERIMENTAL && CYCLADES
325 The Cyclades-Z family of multiport cards allows 2 (two) driver op
326 modes: polling and interrupt. In polling mode, the driver will check
327 the status of the Cyclades-Z ports every certain amount of time
328 (which is called polling cycle and is configurable). In interrupt
329 mode, it will use an interrupt line (IRQ) in order to check the
330 status of the Cyclades-Z ports. The default op mode is polling. If
334 tristate "Moxa Intellio support"
335 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
338 Say Y here if you have a Moxa Intellio multiport serial card.
340 To compile this driver as a module, choose M here: the
341 module will be called moxa.
344 tristate "Moxa SmartIO support v. 2.0"
345 depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
347 Say Y here if you have a Moxa SmartIO multiport serial card and/or
348 want to help develop a new version of this driver.
350 This is upgraded (1.9.1) driver from original Moxa drivers with
351 changes finally resulting in PCI probing.
353 This driver can also be built as a module. The module will be called
354 mxser. If you want to do that, say M here.
357 tristate "Microgate SyncLink card support"
358 depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
360 Provides support for the SyncLink ISA and PCI multiprotocol serial
361 adapters. These adapters support asynchronous and HDLC bit
362 synchronous communication up to 10Mbps (PCI adapter).
364 This driver can only be built as a module ( = code which can be
365 inserted in and removed from the running kernel whenever you want).
366 The module will be called synclink. If you want to do that, say M
370 tristate "SyncLink Multiport support"
371 depends on SERIAL_NONSTANDARD && PCI
373 Enable support for the SyncLink Multiport (2 or 4 ports)
374 serial adapter, running asynchronous and HDLC communications up
375 to 2.048Mbps. Each ports is independently selectable for
376 RS-232, V.35, RS-449, RS-530, and X.21
378 This driver may be built as a module ( = code which can be
379 inserted in and removed from the running kernel whenever you want).
380 The module will be called synclinkmp. If you want to do that, say M
384 tristate "SyncLink GT/AC support"
385 depends on SERIAL_NONSTANDARD && PCI
387 Support for SyncLink GT and SyncLink AC families of
388 synchronous and asynchronous serial adapters
389 manufactured by Microgate Systems, Ltd. (www.microgate.com)
392 tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
393 depends on PCI && EXPERIMENTAL
395 If you have a HSDPA driver Broadband Wireless Data Card -
396 Globe Trotter PCMCIA card, say Y here.
398 To compile this driver as a module, choose M here, the module
399 will be called nozomi.
402 tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
403 depends on SERIAL_NONSTANDARD && PCI
406 This is a driver for the Multi-Tech cards which provide several
407 serial ports. The driver is experimental and can currently only be
408 built as a module. The module will be called isicom.
409 If you want to do that, choose M here.
412 tristate "HDLC line discipline support"
413 depends on SERIAL_NONSTANDARD
415 Allows synchronous HDLC communications with tty device drivers that
416 support synchronous HDLC such as the Microgate SyncLink adapter.
418 This driver can be built as a module ( = code which can be
419 inserted in and removed from the running kernel whenever you want).
420 The module will be called n_hdlc. If you want to do that, say M
424 tristate "GSM MUX line discipline support (EXPERIMENTAL)"
425 depends on EXPERIMENTAL
428 This line discipline provides support for the GSM MUX protocol and
429 presents the mux as a set of 61 individual tty devices.
432 tristate "Trace data router for MIPI P1149.7 cJTAG standard"
433 depends on TRACE_SINK
436 The trace router uses the Linux tty line discipline framework to
437 route trace data coming from a tty port (say UART for example) to
438 the trace sink line discipline driver and to another tty port (say
439 USB). This is part of a solution for the MIPI P1149.7, compact JTAG,
440 standard, which is for debugging mobile devices. The PTI driver in
441 drivers/misc/pti.c defines the majority of this MIPI solution.
443 You should select this driver if the target kernel is meant for
444 a mobile device containing a modem. Then you will need to select
445 "Trace data sink for MIPI P1149.7 cJTAG standard" line discipline
449 tristate "Trace data sink for MIPI P1149.7 cJTAG standard"
452 The trace sink uses the Linux line discipline framework to receive
453 trace data coming from the trace router line discipline driver
454 to a user-defined tty port target, like USB.
455 This is to provide a way to extract modem trace data on
456 devices that do not have a PTI HW module, or just need modem
457 trace data to come out of a different HW output port.
458 This is part of a solution for the P1149.7, compact JTAG, standard.
460 If you select this option, you need to select
461 "Trace data router for MIPI P1149.7 cJTAG standard".
463 config PPC_EPAPR_HV_BYTECHAN
464 tristate "ePAPR hypervisor byte channel driver"
467 This driver creates /dev entries for each ePAPR hypervisor byte
468 channel, thereby allowing applications to communicate with byte
469 channels as if they were serial ports.
471 config PPC_EARLY_DEBUG_EHV_BC
472 bool "Early console (udbg) support for ePAPR hypervisors"
473 depends on PPC_EPAPR_HV_BYTECHAN=y
475 Select this option to enable early console (a.k.a. "udbg") support
476 via an ePAPR byte channel. You also need to choose the byte channel
479 config PPC_EARLY_DEBUG_EHV_BC_HANDLE
480 int "Byte channel handle for early console (udbg)"
481 depends on PPC_EARLY_DEBUG_EHV_BC
484 If you want early console (udbg) output through a byte channel,
485 specify the handle of the byte channel to use.
487 For this to work, the byte channel driver must be compiled
488 in-kernel, not as a module.
490 Note that only one early console driver can be enabled, so don't
491 enable any others if you enable this one.
493 If the number you specify is not a valid byte channel handle, then
494 there simply will be no early console output. This is true also
495 if you don't boot under a hypervisor at all.