arch/um/Kconfig.char

   1 # SPDX-License-Identifier: GPL-2.0
   2 menu "UML Character Devices"
   3
   4 config STDERR_CONSOLE
   5         bool "stderr console"
   6         default y
   7         help
   8           console driver which dumps all printk messages to stderr.
   9
  10 config SSL
  11         bool "Virtual serial line"
  12         help
  13           The User-Mode Linux environment allows you to create virtual serial
  14           lines on the UML that are usually made to show up on the host as
  15           ttys or ptys.
  16
  17           See <http://user-mode-linux.sourceforge.net/old/input.html> for more
  18           information and command line examples of how to use this facility.
  19
  20           Unless you have a specific reason for disabling this, say Y.
  21
  22 config NULL_CHAN
  23         bool "null channel support"
  24         help
  25           This option enables support for attaching UML consoles and serial
  26           lines to a device similar to /dev/null.  Data written to it disappears
  27           and there is never any data to be read.
  28
  29 config PORT_CHAN
  30         bool "port channel support"
  31         help
  32           This option enables support for attaching UML consoles and serial
  33           lines to host portals.  They may be accessed with 'telnet <host>
  34           <port number>'.  Any number of consoles and serial lines may be
  35           attached to a single portal, although what UML device you get when
  36           you telnet to that portal will be unpredictable.
  37           It is safe to say 'Y' here.
  38
  39 config PTY_CHAN
  40         bool "pty channel support"
  41         help
  42           This option enables support for attaching UML consoles and serial
  43           lines to host pseudo-terminals.  Access to both traditional
  44           pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled
  45           with this option.  The assignment of UML devices to host devices
  46           will be announced in the kernel message log.
  47           It is safe to say 'Y' here.
  48
  49 config TTY_CHAN
  50         bool "tty channel support"
  51         help
  52           This option enables support for attaching UML consoles and serial
  53           lines to host terminals.  Access to both virtual consoles
  54           (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and
  55           /dev/pts/*) are controlled by this option.
  56           It is safe to say 'Y' here.
  57
  58 config XTERM_CHAN
  59         bool "xterm channel support"
  60         help
  61           This option enables support for attaching UML consoles and serial
  62           lines to xterms.  Each UML device so assigned will be brought up in
  63           its own xterm.
  64           It is safe to say 'Y' here.
  65
  66 config NOCONFIG_CHAN
  67         bool
  68         default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN)
  69
  70 config CON_ZERO_CHAN
  71         string "Default main console channel initialization"
  72         default "fd:0,fd:1"
  73         help
  74           This is the string describing the channel to which the main console
  75           will be attached by default.  This value can be overridden from the
  76           command line.  The default value is "fd:0,fd:1", which attaches the
  77           main console to stdin and stdout.
  78           It is safe to leave this unchanged.
  79
  80 config CON_CHAN
  81         string "Default console channel initialization"
  82         default "xterm"
  83         help
  84           This is the string describing the channel to which all consoles
  85           except the main console will be attached by default.  This value can
  86           be overridden from the command line.  The default value is "xterm",
  87           which brings them up in xterms.
  88           It is safe to leave this unchanged, although you may wish to change
  89           this if you expect the UML that you build to be run in environments
  90           which don't have X or xterm available.
  91
  92 config SSL_CHAN
  93         string "Default serial line channel initialization"
  94         default "pty"
  95         help
  96           This is the string describing the channel to which the serial lines
  97           will be attached by default.  This value can be overridden from the
  98           command line.  The default value is "pty", which attaches them to
  99           traditional pseudo-terminals.
 100           It is safe to leave this unchanged, although you may wish to change
 101           this if you expect the UML that you build to be run in environments
 102           which don't have a set of /dev/pty* devices.
 103
 104 config UML_SOUND
 105         tristate "Sound support"
 106         help
 107           This option enables UML sound support.  If enabled, it will pull in
 108           soundcore and the UML hostaudio relay, which acts as a intermediary
 109           between the host's dsp and mixer devices and the UML sound system.
 110           It is safe to say 'Y' here.
 111
 112 config SOUND
 113         tristate
 114         default UML_SOUND
 115
 116 config SOUND_OSS_CORE
 117         bool
 118         default UML_SOUND
 119
 120 config HOSTAUDIO
 121         tristate
 122         default UML_SOUND
 123
 124 endmenu