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-rw-r--r--arch/um/Kconfig.char141
1 files changed, 69 insertions, 72 deletions
diff --git a/arch/um/Kconfig.char b/arch/um/Kconfig.char
index a5b079d5e865..9a78d354f0b4 100644
--- a/arch/um/Kconfig.char
+++ b/arch/um/Kconfig.char
@@ -5,7 +5,7 @@ config STDERR_CONSOLE
5 bool "stderr console" 5 bool "stderr console"
6 default y 6 default y
7 help 7 help
8 console driver which dumps all printk messages to stderr. 8 console driver which dumps all printk messages to stderr.
9 9
10config STDIO_CONSOLE 10config STDIO_CONSOLE
11 bool 11 bool
@@ -14,60 +14,58 @@ config STDIO_CONSOLE
14config SSL 14config SSL
15 bool "Virtual serial line" 15 bool "Virtual serial line"
16 help 16 help
17 The User-Mode Linux environment allows you to create virtual serial 17 The User-Mode Linux environment allows you to create virtual serial
18 lines on the UML that are usually made to show up on the host as 18 lines on the UML that are usually made to show up on the host as
19 ttys or ptys. 19 ttys or ptys.
20 20
21 See <http://user-mode-linux.sourceforge.net/input.html> for more 21 See <http://user-mode-linux.sourceforge.net/input.html> for more
22 information and command line examples of how to use this facility. 22 information and command line examples of how to use this facility.
23 23
24 Unless you have a specific reason for disabling this, say Y. 24 Unless you have a specific reason for disabling this, say Y.
25 25
26config NULL_CHAN 26config NULL_CHAN
27 bool "null channel support" 27 bool "null channel support"
28 help 28 help
29 This option enables support for attaching UML consoles and serial 29 This option enables support for attaching UML consoles and serial
30 lines to a device similar to /dev/null. Data written to it disappears 30 lines to a device similar to /dev/null. Data written to it disappears
31 and there is never any data to be read. 31 and there is never any data to be read.
32 32
33config PORT_CHAN 33config PORT_CHAN
34 bool "port channel support" 34 bool "port channel support"
35 help 35 help
36 This option enables support for attaching UML consoles and serial 36 This option enables support for attaching UML consoles and serial
37 lines to host portals. They may be accessed with 'telnet <host> 37 lines to host portals. They may be accessed with 'telnet <host>
38 <port number>'. Any number of consoles and serial lines may be 38 <port number>'. Any number of consoles and serial lines may be
39 attached to a single portal, although what UML device you get when 39 attached to a single portal, although what UML device you get when
40 you telnet to that portal will be unpredictable. 40 you telnet to that portal will be unpredictable.
41 It is safe to say 'Y' here. 41 It is safe to say 'Y' here.
42 42
43config PTY_CHAN 43config PTY_CHAN
44 bool "pty channel support" 44 bool "pty channel support"
45 help 45 help
46 This option enables support for attaching UML consoles and serial 46 This option enables support for attaching UML consoles and serial
47 lines to host pseudo-terminals. Access to both traditional 47 lines to host pseudo-terminals. Access to both traditional
48 pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled 48 pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled
49 with this option. The assignment of UML devices to host devices 49 with this option. The assignment of UML devices to host devices
50 will be announced in the kernel message log. 50 will be announced in the kernel message log.
51 It is safe to say 'Y' here. 51 It is safe to say 'Y' here.
52 52
53config TTY_CHAN 53config TTY_CHAN
54 bool "tty channel support" 54 bool "tty channel support"
55 help 55 help
56 This option enables support for attaching UML consoles and serial 56 This option enables support for attaching UML consoles and serial
57 lines to host terminals. Access to both virtual consoles 57 lines to host terminals. Access to both virtual consoles
58 (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and 58 (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and
59 /dev/pts/*) are controlled by this option. 59 /dev/pts/*) are controlled by this option.
60 It is safe to say 'Y' here. 60 It is safe to say 'Y' here.
61 61
62config XTERM_CHAN 62config XTERM_CHAN
63 bool "xterm channel support" 63 bool "xterm channel support"
64 help 64 help
65 This option enables support for attaching UML consoles and serial 65 This option enables support for attaching UML consoles and serial
66 lines to xterms. Each UML device so assigned will be brought up in 66 lines to xterms. Each UML device so assigned will be brought up in
67 its own xterm. 67 its own xterm.
68 If you disable this option, then CONFIG_PT_PROXY will be disabled as 68 It is safe to say 'Y' here.
69 well, since UML's gdb currently requires an xterm.
70 It is safe to say 'Y' here.
71 69
72config NOCONFIG_CHAN 70config NOCONFIG_CHAN
73 bool 71 bool
@@ -77,39 +75,39 @@ config CON_ZERO_CHAN
77 string "Default main console channel initialization" 75 string "Default main console channel initialization"
78 default "fd:0,fd:1" 76 default "fd:0,fd:1"
79 help 77 help
80 This is the string describing the channel to which the main console 78 This is the string describing the channel to which the main console
81 will be attached by default. This value can be overridden from the 79 will be attached by default. This value can be overridden from the
82 command line. The default value is "fd:0,fd:1", which attaches the 80 command line. The default value is "fd:0,fd:1", which attaches the
83 main console to stdin and stdout. 81 main console to stdin and stdout.
84 It is safe to leave this unchanged. 82 It is safe to leave this unchanged.
85 83
86config CON_CHAN 84config CON_CHAN
87 string "Default console channel initialization" 85 string "Default console channel initialization"
88 default "xterm" 86 default "xterm"
89 help 87 help
90 This is the string describing the channel to which all consoles 88 This is the string describing the channel to which all consoles
91 except the main console will be attached by default. This value can 89 except the main console will be attached by default. This value can
92 be overridden from the command line. The default value is "xterm", 90 be overridden from the command line. The default value is "xterm",
93 which brings them up in xterms. 91 which brings them up in xterms.
94 It is safe to leave this unchanged, although you may wish to change 92 It is safe to leave this unchanged, although you may wish to change
95 this if you expect the UML that you build to be run in environments 93 this if you expect the UML that you build to be run in environments
96 which don't have X or xterm available. 94 which don't have X or xterm available.
97 95
98config SSL_CHAN 96config SSL_CHAN
99 string "Default serial line channel initialization" 97 string "Default serial line channel initialization"
100 default "pty" 98 default "pty"
101 help 99 help
102 This is the string describing the channel to which the serial lines 100 This is the string describing the channel to which the serial lines
103 will be attached by default. This value can be overridden from the 101 will be attached by default. This value can be overridden from the
104 command line. The default value is "pty", which attaches them to 102 command line. The default value is "pty", which attaches them to
105 traditional pseudo-terminals. 103 traditional pseudo-terminals.
106 It is safe to leave this unchanged, although you may wish to change 104 It is safe to leave this unchanged, although you may wish to change
107 this if you expect the UML that you build to be run in environments 105 this if you expect the UML that you build to be run in environments
108 which don't have a set of /dev/pty* devices. 106 which don't have a set of /dev/pty* devices.
109 107
110config UNIX98_PTYS 108config UNIX98_PTYS
111 bool "Unix98 PTY support" 109 bool "Unix98 PTY support"
112 ---help--- 110 help
113 A pseudo terminal (PTY) is a software device consisting of two 111 A pseudo terminal (PTY) is a software device consisting of two
114 halves: a master and a slave. The slave device behaves identical to 112 halves: a master and a slave. The slave device behaves identical to
115 a physical terminal; the master device is used by a process to 113 a physical terminal; the master device is used by a process to
@@ -132,7 +130,7 @@ config UNIX98_PTYS
132config LEGACY_PTYS 130config LEGACY_PTYS
133 bool "Legacy (BSD) PTY support" 131 bool "Legacy (BSD) PTY support"
134 default y 132 default y
135 ---help--- 133 help
136 A pseudo terminal (PTY) is a software device consisting of two 134 A pseudo terminal (PTY) is a software device consisting of two
137 halves: a master and a slave. The slave device behaves identical to 135 halves: a master and a slave. The slave device behaves identical to
138 a physical terminal; the master device is used by a process to 136 a physical terminal; the master device is used by a process to
@@ -170,7 +168,7 @@ config LEGACY_PTY_COUNT
170 int "Maximum number of legacy PTY in use" 168 int "Maximum number of legacy PTY in use"
171 depends on LEGACY_PTYS 169 depends on LEGACY_PTYS
172 default "256" 170 default "256"
173 ---help--- 171 help
174 The maximum number of legacy PTYs that can be used at any one time. 172 The maximum number of legacy PTYs that can be used at any one time.
175 The default is 256, and should be more than enough. Embedded 173 The default is 256, and should be more than enough. Embedded
176 systems may want to reduce this to save memory. 174 systems may want to reduce this to save memory.
@@ -196,10 +194,10 @@ config UML_WATCHDOG
196config UML_SOUND 194config UML_SOUND
197 tristate "Sound support" 195 tristate "Sound support"
198 help 196 help
199 This option enables UML sound support. If enabled, it will pull in 197 This option enables UML sound support. If enabled, it will pull in
200 soundcore and the UML hostaudio relay, which acts as a intermediary 198 soundcore and the UML hostaudio relay, which acts as a intermediary
201 between the host's dsp and mixer devices and the UML sound system. 199 between the host's dsp and mixer devices and the UML sound system.
202 It is safe to say 'Y' here. 200 It is safe to say 'Y' here.
203 201
204config SOUND 202config SOUND
205 tristate 203 tristate
@@ -217,22 +215,21 @@ config HW_RANDOM
217config UML_RANDOM 215config UML_RANDOM
218 tristate "Hardware random number generator" 216 tristate "Hardware random number generator"
219 help 217 help
220 This option enables UML's "hardware" random number generator. It 218 This option enables UML's "hardware" random number generator. It
221 attaches itself to the host's /dev/random, supplying as much entropy 219 attaches itself to the host's /dev/random, supplying as much entropy
222 as the host has, rather than the small amount the UML gets from its 220 as the host has, rather than the small amount the UML gets from its
223 own drivers. It registers itself as a standard hardware random number 221 own drivers. It registers itself as a standard hardware random number
224 generator, major 10, minor 183, and the canonical device name is 222 generator, major 10, minor 183, and the canonical device name is
225 /dev/hwrng. 223 /dev/hwrng.
226 The way to make use of this is to install the rng-tools package 224 The way to make use of this is to install the rng-tools package
227 (check your distro, or download from 225 (check your distro, or download from
228 http://sourceforge.net/projects/gkernel/). rngd periodically reads 226 http://sourceforge.net/projects/gkernel/). rngd periodically reads
229 /dev/hwrng and injects the entropy into /dev/random. 227 /dev/hwrng and injects the entropy into /dev/random.
230 228
231config MMAPPER 229config MMAPPER
232 tristate "iomem emulation driver" 230 tristate "iomem emulation driver"
233 help 231 help
234 This driver allows a host file to be used as emulated IO memory inside 232 This driver allows a host file to be used as emulated IO memory inside
235 UML. 233 UML.
236 234
237endmenu 235endmenu
238