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config CCW
bool
default y
source "drivers/block/Kconfig"
source "drivers/md/Kconfig"
menu "Character device drivers"
config UNIX98_PTYS
bool "Unix98 PTY support"
---help---
A pseudo terminal (PTY) is a software device consisting of two
halves: a master and a slave. The slave device behaves identical to
a physical terminal; the master device is used by a process to
read data from and write data to the slave, thereby emulating a
terminal. Typical programs for the master side are telnet servers
and xterms.
Linux has traditionally used the BSD-like names /dev/ptyxx for
masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
has a number of problems. The GNU C library glibc 2.1 and later,
however, supports the Unix98 naming standard: in order to acquire a
pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
terminal is then made available to the process and the pseudo
terminal slave can be accessed as /dev/pts/<number>. What was
traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
The entries in /dev/pts/ are created on the fly by a virtual
file system; therefore, if you say Y here you should say Y to
"/dev/pts file system for Unix98 PTYs" as well.
If you want to say Y here, you need to have the C library glibc 2.1
or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
Read the instructions in <file:Documentation/Changes> pertaining to
pseudo terminals. It's safe to say N.
config UNIX98_PTY_COUNT
int "Maximum number of Unix98 PTYs in use (0-2048)"
depends on UNIX98_PTYS
default "256"
help
The maximum number of Unix98 PTYs that can be used at any one time.
The default is 256, and should be enough for desktop systems. Server
machines which support incoming telnet/rlogin/ssh connections and/or
serve several X terminals may want to increase this: every incoming
connection and every xterm uses up one PTY.
When not in use, each additional set of 256 PTYs occupy
approximately 8 KB of kernel memory on 32-bit architectures.
config HANGCHECK_TIMER
tristate "Hangcheck timer"
help
The hangcheck-timer module detects when the system has gone
out to lunch past a certain margin. It can reboot the system
or merely print a warning.
source "drivers/char/watchdog/Kconfig"
comment "S/390 character device drivers"
config TN3270
tristate "Support for locally attached 3270 terminals"
help
Include support for IBM 3270 terminals.
config TN3270_TTY
tristate "Support for tty input/output on 3270 terminals"
depends on TN3270
help
Include support for using an IBM 3270 terminal as a Linux tty.
config TN3270_FS
tristate "Support for fullscreen applications on 3270 terminals"
depends on TN3270
help
Include support for fullscreen applications on an IBM 3270 terminal.
config TN3270_CONSOLE
bool "Support for console on 3270 terminal"
depends on TN3270=y && TN3270_TTY=y
help
Include support for using an IBM 3270 terminal as a Linux system
console. Available only if 3270 support is compiled in statically.
config TN3215
bool "Support for 3215 line mode terminal"
help
Include support for IBM 3215 line-mode terminals.
config TN3215_CONSOLE
bool "Support for console on 3215 line mode terminal"
depends on TN3215
help
Include support for using an IBM 3215 line-mode terminal as a
Linux system console.
config CCW_CONSOLE
bool
depends on TN3215_CONSOLE || TN3270_CONSOLE
default y
config SCLP
bool "Support for SCLP"
help
Include support for the SCLP interface to the service element.
config SCLP_TTY
bool "Support for SCLP line mode terminal"
depends on SCLP
help
Include support for IBM SCLP line-mode terminals.
config SCLP_CONSOLE
bool "Support for console on SCLP line mode terminal"
depends on SCLP_TTY
help
Include support for using an IBM HWC line-mode terminal as the Linux
system console.
config SCLP_VT220_TTY
bool "Support for SCLP VT220-compatible terminal"
depends on SCLP
help
Include support for an IBM SCLP VT220-compatible terminal.
config SCLP_VT220_CONSOLE
bool "Support for console on SCLP VT220-compatible terminal"
depends on SCLP_VT220_TTY
help
Include support for using an IBM SCLP VT220-compatible terminal as a
Linux system console.
config SCLP_CPI
tristate "Control-Program Identification"
depends on SCLP
help
This option enables the hardware console interface for system
identification. This is commonly used for workload management and
gives you a nice name for the system on the service element.
Please select this option as a module since built-in operation is
completely untested.
You should only select this option if you know what you are doing,
need this feature and intend to run your kernel in LPAR.
config S390_TAPE
tristate "S/390 tape device support"
help
Select this option if you want to access channel-attached tape
devices on IBM S/390 or zSeries.
If you select this option you will also want to select at
least one of the tape interface options and one of the tape
hardware options in order to access a tape device.
This option is also available as a module. The module will be
called tape390 and include all selected interfaces and
hardware drivers.
comment "S/390 tape interface support"
depends on S390_TAPE
config S390_TAPE_BLOCK
bool "Support for tape block devices"
depends on S390_TAPE
help
Select this option if you want to access your channel-attached tape
devices using the block device interface. This interface is similar
to CD-ROM devices on other platforms. The tapes can only be
accessed read-only when using this interface. Have a look at
<file:Documentation/s390/TAPE> for further information about creating
volumes for and using this interface. It is safe to say "Y" here.
comment "S/390 tape hardware support"
depends on S390_TAPE
config S390_TAPE_34XX
tristate "Support for 3480/3490 tape hardware"
depends on S390_TAPE
help
Select this option if you want to access IBM 3480/3490 magnetic
tape subsystems and 100% compatibles.
It is safe to say "Y" here.
config S390_TAPE_3590
tristate "Support for 3590 tape hardware"
depends on S390_TAPE
help
Select this option if you want to access IBM 3590 magnetic
tape subsystems and 100% compatibles.
It is safe to say "Y" here.
config VMLOGRDR
tristate "Support for the z/VM recording system services (VM only)"
depends on IUCV
help
Select this option if you want to be able to receive records collected
by the z/VM recording system services, eg. from *LOGREC, *ACCOUNT or
*SYMPTOM.
This driver depends on the IUCV support driver.
config VMCP
tristate "Support for the z/VM CP interface (VM only)"
help
Select this option if you want to be able to interact with the control
program on z/VM
config MONREADER
tristate "API for reading z/VM monitor service records"
depends on IUCV
help
Character device driver for reading z/VM monitor service records
endmenu
menu "Cryptographic devices"
endmenu
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