1 # SPDX-License-Identifier: GPL-2.0
2 menu "UML Character Devices"
8 console driver which dumps all printk messages to stderr.
11 bool "Virtual serial line"
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
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.
20 Unless you have a specific reason for disabling this, say Y.
23 bool "null channel support"
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.
30 bool "port channel support"
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.
40 bool "pty channel support"
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.
50 bool "tty channel support"
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.
59 bool "xterm channel support"
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
64 It is safe to say 'Y' here.
68 default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN)
71 string "Default main console channel initialization"
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.
81 string "Default console channel initialization"
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.
93 string "Default serial line channel initialization"
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.
105 tristate "Sound support"
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.
116 config SOUND_OSS_CORE