345 lines
13 KiB
Plaintext
345 lines
13 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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menu "UML Character Devices"
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config STDERR_CONSOLE
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bool "stderr console"
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default y
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help
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console driver which dumps all printk messages to stderr.
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config SSL
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bool "Virtual serial line"
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help
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The User-Mode Linux environment allows you to create virtual serial
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lines on the UML that are usually made to show up on the host as
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ttys or ptys.
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See <http://user-mode-linux.sourceforge.net/old/input.html> for more
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information and command line examples of how to use this facility.
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Unless you have a specific reason for disabling this, say Y.
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config NULL_CHAN
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bool "null channel support"
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help
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This option enables support for attaching UML consoles and serial
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lines to a device similar to /dev/null. Data written to it disappears
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and there is never any data to be read.
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config PORT_CHAN
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bool "port channel support"
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help
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This option enables support for attaching UML consoles and serial
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lines to host portals. They may be accessed with 'telnet <host>
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<port number>'. Any number of consoles and serial lines may be
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attached to a single portal, although what UML device you get when
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you telnet to that portal will be unpredictable.
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It is safe to say 'Y' here.
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config PTY_CHAN
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bool "pty channel support"
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help
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This option enables support for attaching UML consoles and serial
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lines to host pseudo-terminals. Access to both traditional
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pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled
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with this option. The assignment of UML devices to host devices
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will be announced in the kernel message log.
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It is safe to say 'Y' here.
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config TTY_CHAN
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bool "tty channel support"
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help
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This option enables support for attaching UML consoles and serial
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lines to host terminals. Access to both virtual consoles
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(/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and
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/dev/pts/*) are controlled by this option.
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It is safe to say 'Y' here.
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config XTERM_CHAN
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bool "xterm channel support"
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help
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This option enables support for attaching UML consoles and serial
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lines to xterms. Each UML device so assigned will be brought up in
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its own xterm.
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It is safe to say 'Y' here.
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config NOCONFIG_CHAN
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bool
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default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN)
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config CON_ZERO_CHAN
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string "Default main console channel initialization"
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default "fd:0,fd:1"
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help
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This is the string describing the channel to which the main console
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will be attached by default. This value can be overridden from the
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command line. The default value is "fd:0,fd:1", which attaches the
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main console to stdin and stdout.
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It is safe to leave this unchanged.
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config CON_CHAN
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string "Default console channel initialization"
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default "xterm"
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help
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This is the string describing the channel to which all consoles
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except the main console will be attached by default. This value can
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be overridden from the command line. The default value is "xterm",
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which brings them up in xterms.
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It is safe to leave this unchanged, although you may wish to change
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this if you expect the UML that you build to be run in environments
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which don't have X or xterm available.
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config SSL_CHAN
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string "Default serial line channel initialization"
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default "pty"
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help
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This is the string describing the channel to which the serial lines
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will be attached by default. This value can be overridden from the
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command line. The default value is "pty", which attaches them to
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traditional pseudo-terminals.
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It is safe to leave this unchanged, although you may wish to change
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this if you expect the UML that you build to be run in environments
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which don't have a set of /dev/pty* devices.
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config UML_SOUND
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tristate "Sound support"
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help
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This option enables UML sound support. If enabled, it will pull in
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soundcore and the UML hostaudio relay, which acts as a intermediary
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between the host's dsp and mixer devices and the UML sound system.
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It is safe to say 'Y' here.
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config SOUND
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tristate
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default UML_SOUND
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config SOUND_OSS_CORE
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bool
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default UML_SOUND
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config HOSTAUDIO
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tristate
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default UML_SOUND
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endmenu
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menu "UML Network Devices"
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depends on NET
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# UML virtual driver
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config UML_NET
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bool "Virtual network device"
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help
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While the User-Mode port cannot directly talk to any physical
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hardware devices, this choice and the following transport options
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provide one or more virtual network devices through which the UML
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kernels can talk to each other, the host, and with the host's help,
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machines on the outside world.
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For more information, including explanations of the networking and
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sample configurations, see
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<http://user-mode-linux.sourceforge.net/old/networking.html>.
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If you'd like to be able to enable networking in the User-Mode
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linux environment, say Y; otherwise say N. Note that you must
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enable at least one of the following transport options to actually
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make use of UML networking.
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config UML_NET_ETHERTAP
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bool "Ethertap transport"
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depends on UML_NET
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help
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The Ethertap User-Mode Linux network transport allows a single
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running UML to exchange packets with its host over one of the
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host's Ethertap devices, such as /dev/tap0. Additional running
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UMLs can use additional Ethertap devices, one per running UML.
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While the UML believes it's on a (multi-device, broadcast) virtual
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Ethernet network, it's in fact communicating over a point-to-point
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link with the host.
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To use this, your host kernel must have support for Ethertap
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devices. Also, if your host kernel is 2.4.x, it must have
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CONFIG_NETLINK_DEV configured as Y or M.
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For more information, see
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<http://user-mode-linux.sourceforge.net/old/networking.html> That site
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has examples of the UML command line to use to enable Ethertap
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networking.
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If you'd like to set up an IP network with the host and/or the
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outside world, say Y to this, the Daemon Transport and/or the
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Slip Transport. You'll need at least one of them, but may choose
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more than one without conflict. If you don't need UML networking,
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say N.
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config UML_NET_TUNTAP
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bool "TUN/TAP transport"
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depends on UML_NET
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help
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The UML TUN/TAP network transport allows a UML instance to exchange
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packets with the host over a TUN/TAP device. This option will only
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work with a 2.4 host, unless you've applied the TUN/TAP patch to
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your 2.2 host kernel.
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To use this transport, your host kernel must have support for TUN/TAP
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devices, either built-in or as a module.
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config UML_NET_SLIP
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bool "SLIP transport"
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depends on UML_NET
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help
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The slip User-Mode Linux network transport allows a running UML to
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network with its host over a point-to-point link. Unlike Ethertap,
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which can carry any Ethernet frame (and hence even non-IP packets),
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the slip transport can only carry IP packets.
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To use this, your host must support slip devices.
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For more information, see
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<http://user-mode-linux.sourceforge.net/old/networking.html>.
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has examples of the UML command line to use to enable slip
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networking, and details of a few quirks with it.
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The Ethertap Transport is preferred over slip because of its
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limitations. If you prefer slip, however, say Y here. Otherwise
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choose the Multicast transport (to network multiple UMLs on
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multiple hosts), Ethertap (to network with the host and the
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outside world), and/or the Daemon transport (to network multiple
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UMLs on a single host). You may choose more than one without
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conflict. If you don't need UML networking, say N.
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config UML_NET_DAEMON
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bool "Daemon transport"
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depends on UML_NET
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help
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This User-Mode Linux network transport allows one or more running
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UMLs on a single host to communicate with each other, but not to
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the host.
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To use this form of networking, you'll need to run the UML
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networking daemon on the host.
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For more information, see
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<http://user-mode-linux.sourceforge.net/old/networking.html> That site
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has examples of the UML command line to use to enable Daemon
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networking.
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If you'd like to set up a network with other UMLs on a single host,
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say Y. If you need a network between UMLs on multiple physical
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hosts, choose the Multicast Transport. To set up a network with
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the host and/or other IP machines, say Y to the Ethertap or Slip
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transports. You'll need at least one of them, but may choose
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more than one without conflict. If you don't need UML networking,
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say N.
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config UML_NET_VECTOR
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bool "Vector I/O high performance network devices"
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depends on UML_NET
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help
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This User-Mode Linux network driver uses multi-message send
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and receive functions. The host running the UML guest must have
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a linux kernel version above 3.0 and a libc version > 2.13.
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This driver provides tap, raw, gre and l2tpv3 network transports
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with up to 4 times higher network throughput than the UML network
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drivers.
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config UML_NET_VDE
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bool "VDE transport"
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depends on UML_NET
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help
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This User-Mode Linux network transport allows one or more running
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UMLs on a single host to communicate with each other and also
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with the rest of the world using Virtual Distributed Ethernet,
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an improved fork of uml_switch.
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You must have libvdeplug installed in order to build the vde
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transport into UML.
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To use this form of networking, you will need to run vde_switch
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on the host.
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For more information, see <http://wiki.virtualsquare.org/>
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That site has a good overview of what VDE is and also examples
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of the UML command line to use to enable VDE networking.
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If you need UML networking with VDE,
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say Y.
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config UML_NET_MCAST
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bool "Multicast transport"
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depends on UML_NET
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help
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This Multicast User-Mode Linux network transport allows multiple
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UMLs (even ones running on different host machines!) to talk to
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each other over a virtual ethernet network. However, it requires
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at least one UML with one of the other transports to act as a
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bridge if any of them need to be able to talk to their hosts or any
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other IP machines.
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To use this, your host kernel(s) must support IP Multicasting.
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For more information, see
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<http://user-mode-linux.sourceforge.net/old/networking.html> That site
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has examples of the UML command line to use to enable Multicast
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networking, and notes about the security of this approach.
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If you need UMLs on multiple physical hosts to communicate as if
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they shared an Ethernet network, say Y. If you need to communicate
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with other IP machines, make sure you select one of the other
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transports (possibly in addition to Multicast; they're not
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exclusive). If you don't need to network UMLs say N to each of
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the transports.
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config UML_NET_PCAP
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bool "pcap transport"
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depends on UML_NET
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help
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The pcap transport makes a pcap packet stream on the host look
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like an ethernet device inside UML. This is useful for making
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UML act as a network monitor for the host. You must have libcap
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installed in order to build the pcap transport into UML.
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For more information, see
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<http://user-mode-linux.sourceforge.net/old/networking.html> That site
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has examples of the UML command line to use to enable this option.
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If you intend to use UML as a network monitor for the host, say
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Y here. Otherwise, say N.
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config UML_NET_SLIRP
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bool "SLiRP transport"
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depends on UML_NET
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help
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The SLiRP User-Mode Linux network transport allows a running UML
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to network by invoking a program that can handle SLIP encapsulated
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packets. This is commonly (but not limited to) the application
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known as SLiRP, a program that can re-socket IP packets back onto
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he host on which it is run. Only IP packets are supported,
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unlike other network transports that can handle all Ethernet
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frames. In general, slirp allows the UML the same IP connectivity
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to the outside world that the host user is permitted, and unlike
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other transports, SLiRP works without the need of root level
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privleges, setuid binaries, or SLIP devices on the host. This
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also means not every type of connection is possible, but most
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situations can be accommodated with carefully crafted slirp
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commands that can be passed along as part of the network device's
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setup string. The effect of this transport on the UML is similar
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that of a host behind a firewall that masquerades all network
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connections passing through it (but is less secure).
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To use this you should first have slirp compiled somewhere
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accessible on the host, and have read its documentation. If you
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don't need UML networking, say N.
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Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
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endmenu
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config VIRTIO_UML
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bool "UML driver for virtio devices"
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select VIRTIO
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help
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This driver provides support for virtio based paravirtual device
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drivers over vhost-user sockets.
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