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Linus Torvalds1da177e2005-04-16 15:20:36 -07001config STATIC_LINK
2 bool "Force a static link"
3 default n
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 help
Jeff Dike4c9e1382007-10-16 01:26:54 -07005 This option gives you the ability to force a static link of UML.
6 Normally, UML is linked as a shared binary. This is inconvenient for
7 use in a chroot jail. So, if you intend to run UML inside a chroot,
8 you probably want to say Y here.
9 Additionally, this option enables using higher memory spaces (up to
10 2.75G) for UML.
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
Dave Hansen3f22ab22005-06-23 00:07:43 -070012source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14config LD_SCRIPT_STATIC
15 bool
16 default y
Jeff Dike42fda662007-10-16 01:26:50 -070017 depends on STATIC_LINK
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19config LD_SCRIPT_DYN
20 bool
21 default y
22 depends on !LD_SCRIPT_STATIC
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024source "fs/Kconfig.binfmt"
25
26config HOSTFS
27 tristate "Host filesystem"
28 help
Jeff Dike4c9e1382007-10-16 01:26:54 -070029 While the User-Mode Linux port uses its own root file system for
30 booting and normal file access, this module lets the UML user
31 access files stored on the host. It does not require any
32 network connection between the Host and UML. An example use of
33 this might be:
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Jeff Dike4c9e1382007-10-16 01:26:54 -070035 mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Jeff Dike4c9e1382007-10-16 01:26:54 -070037 where /tmp/fromhost is an empty directory inside UML and
38 /tmp/umlshare is a directory on the host with files the UML user
39 wishes to access.
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Jeff Dike4c9e1382007-10-16 01:26:54 -070041 For more information, see
42 <http://user-mode-linux.sourceforge.net/hostfs.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Jeff Dike4c9e1382007-10-16 01:26:54 -070044 If you'd like to be able to work with files stored on the host,
45 say Y or M here; otherwise say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047config MCONSOLE
48 bool "Management console"
Richard Weinberger1eb7c6c2015-05-31 23:27:26 +020049 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 default y
51 help
Jeff Dike4c9e1382007-10-16 01:26:54 -070052 The user mode linux management console is a low-level interface to
53 the kernel, somewhat like the i386 SysRq interface. Since there is
54 a full-blown operating system running under every user mode linux
55 instance, there is much greater flexibility possible than with the
56 SysRq mechanism.
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Jeff Dike4c9e1382007-10-16 01:26:54 -070058 If you answer 'Y' to this option, to use this feature, you need the
59 mconsole client (called uml_mconsole) which is present in CVS in
60 2.4.5-9um and later (path /tools/mconsole), and is also in the
61 distribution RPM package in 2.4.6 and later.
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Jeff Dike4c9e1382007-10-16 01:26:54 -070063 It is safe to say 'Y' here.
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65config MAGIC_SYSRQ
66 bool "Magic SysRq key"
67 depends on MCONSOLE
Jeff Dike4c9e1382007-10-16 01:26:54 -070068 help
69 If you say Y here, you will have some control over the system even
70 if the system crashes for example during kernel debugging (e.g., you
71 will be able to flush the buffer cache to disk, reboot the system
72 immediately or dump some status information). A key for each of the
73 possible requests is provided.
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Jeff Dike4c9e1382007-10-16 01:26:54 -070075 This is the feature normally accomplished by pressing a key
76 while holding SysRq (Alt+PrintScreen).
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Jeff Dike4c9e1382007-10-16 01:26:54 -070078 On UML, this is accomplished by sending a "sysrq" command with
79 mconsole, followed by the letter for the requested command.
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Jeff Dike4c9e1382007-10-16 01:26:54 -070081 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
82 unless you really know what this hack does.
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084config KERNEL_STACK_ORDER
85 int "Kernel stack size order"
Jeff Dike02239c22007-05-10 22:22:35 -070086 default 1 if 64BIT
Jeff Dikee80ad9b2007-06-08 13:46:49 -070087 range 1 10 if 64BIT
Jeff Dike02239c22007-05-10 22:22:35 -070088 default 0 if !64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 help
Jeff Dike4c9e1382007-10-16 01:26:54 -070090 This option determines the size of UML kernel stacks. They will
91 be 1 << order pages. The default is OK unless you're running Valgrind
92 on UML, in which case, set this to 3.
FUJITA Tomonorid9112022010-10-26 14:22:18 -070093
Al Virod805a782011-08-18 20:13:00 +010094config MMAPPER
95 tristate "iomem emulation driver"
96 help
97 This driver allows a host file to be used as emulated IO memory inside
98 UML.
99
FUJITA Tomonorid9112022010-10-26 14:22:18 -0700100config NO_DMA
101 def_bool y
Kirill A. Shutemov6b8ce2a2015-04-14 15:46:11 -0700102
103config PGTABLE_LEVELS
104 int
105 default 3 if 3_LEVEL_PGTABLES
106 default 2