1# SPDX-License-Identifier: GPL-2.0 2menu "UML Character Devices" 3 4config STDERR_CONSOLE 5 bool "stderr console" 6 default y 7 help 8 console driver which dumps all printk messages to stderr. 9 10config 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 22config 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 29config 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 39config 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 49config 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 58config 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 66config NOCONFIG_CHAN 67 bool 68 default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN) 69 70config 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 80config 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 92config 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 104config 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 112config SOUND 113 tristate 114 default UML_SOUND 115 116config SOUND_OSS_CORE 117 bool 118 default UML_SOUND 119 120config HOSTAUDIO 121 tristate 122 default UML_SOUND 123 124endmenu 125