Commit d805a786 authored by Al Viro's avatar Al Viro Committed by Richard Weinberger
Browse files

um: clean Kconfig up a bit 



* kill duplicates with drivers/char/Kconfig
* take watchdog one into drivers/watchdog/Kconfig
* take mmapper to arch/um/Kconfig.um
* rename Kconfig.char menu to "UML Character Devices"

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent bad3118f

arch/um/Kconfig.char

+1 −113
Original line number Diff line number Diff line 


menu "Character Devices"

menu "UML Character Devices"



config STDERR_CONSOLE

	bool "stderr console"
@@ -105,92 +104,6 @@ config SSL_CHAN 
          this if you expect the UML that you build to be run in environments

          which don't have a set of /dev/pty* devices.



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.



	  All modern Linux systems use the Unix98 ptys.  Say Y unless

	  you're on an embedded system and want to conserve memory.



config LEGACY_PTYS

	bool "Legacy (BSD) PTY support"

	default y

	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, including

	  security.  This option enables these legacy devices; on most

	  systems, it is safe to say N.



config RAW_DRIVER

        tristate "RAW driver (/dev/raw/rawN)"

	depends on BLOCK

        help

          The raw driver permits block devices to be bound to /dev/raw/rawN.

          Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.

          See the raw(8) manpage for more details.



          Applications should preferably open the device (eg /dev/hda1)

          with the O_DIRECT flag.



config MAX_RAW_DEVS

        int "Maximum number of RAW devices to support (1-8192)"

        depends on RAW_DRIVER

        default "256"

        help

          The maximum number of RAW devices that are supported.

          Default is 256. Increase this number in case you need lots of

          raw devices.



config LEGACY_PTY_COUNT

	int "Maximum number of legacy PTY in use"

	depends on LEGACY_PTYS

	default "256"

	help

	  The maximum number of legacy PTYs that can be used at any one time.

	  The default is 256, and should be more than enough.  Embedded

	  systems may want to reduce this to save memory.



	  When not in use, each legacy PTY occupies 12 bytes on 32-bit

	  architectures and 24 bytes on 64-bit architectures.



config WATCHDOG

	bool "Watchdog Timer Support"



config WATCHDOG_NOWAYOUT

	bool "Disable watchdog shutdown on close"

	depends on WATCHDOG



config SOFT_WATCHDOG

	tristate "Software Watchdog"

	depends on WATCHDOG



config UML_WATCHDOG

	tristate "UML watchdog"

	depends on WATCHDOG



config UML_SOUND

	tristate "Sound support"

	help
@@ -211,29 +124,4 @@ config HOSTAUDIO 
	tristate

	default UML_SOUND



#It is selected elsewhere, so kconfig would warn without this.

config HW_RANDOM

	tristate

	default n



config UML_RANDOM

	tristate "Hardware random number generator"

	help

	  This option enables UML's "hardware" random number generator.  It

	  attaches itself to the host's /dev/random, supplying as much entropy

	  as the host has, rather than the small amount the UML gets from its

	  own drivers.  It registers itself as a standard hardware random number

	  generator, major 10, minor 183, and the canonical device name is

	  /dev/hwrng.

	  The way to make use of this is to install the rng-tools package

	  (check your distro, or download from

	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads

	  /dev/hwrng and injects the entropy into /dev/random.



config MMAPPER

	tristate "iomem emulation driver"

	help

	  This driver allows a host file to be used as emulated IO memory inside

	  UML.



endmenu

arch/um/Kconfig.um

+6 −0
Original line number Diff line number Diff line
@@ -148,5 +148,11 @@ config KERNEL_STACK_ORDER 
	  be 1 << order pages.  The default is OK unless you're running Valgrind

	  on UML, in which case, set this to 3.



config MMAPPER

	tristate "iomem emulation driver"

	help

	  This driver allows a host file to be used as emulated IO memory inside

	  UML.



config NO_DMA

	def_bool y

drivers/char/hw_random/Kconfig

+15 −0
Original line number Diff line number Diff line
@@ -222,3 +222,18 @@ config HW_RANDOM_PPC4XX 
	 module will be called ppc4xx-rng.



	 If unsure, say N.



config UML_RANDOM

	depends on UML

	tristate "Hardware random number generator"

	help

	  This option enables UML's "hardware" random number generator.  It

	  attaches itself to the host's /dev/random, supplying as much entropy

	  as the host has, rather than the small amount the UML gets from its

	  own drivers.  It registers itself as a standard hardware random number

	  generator, major 10, minor 183, and the canonical device name is

	  /dev/hwrng.

	  The way to make use of this is to install the rng-tools package

	  (check your distro, or download from

	  http://sourceforge.net/projects/gkernel/).  rngd periodically reads

	  /dev/hwrng and injects the entropy into /dev/random.

drivers/watchdog/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -1174,6 +1174,10 @@ config XEN_WDT 
	  by Xen 4.0 and newer.  The watchdog timeout period is normally one

	  minute but can be changed with a boot-time parameter.



config UML_WATCHDOG

	tristate "UML watchdog"

	depends on UML



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