Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | config STATIC_LINK |
| 2 | bool "Force a static link" |
| 3 | default n |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | help |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 5 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
Dave Hansen | 3f22ab2 | 2005-06-23 00:07:43 -0700 | [diff] [blame] | 12 | source "mm/Kconfig" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | config LD_SCRIPT_STATIC |
| 15 | bool |
| 16 | default y |
Jeff Dike | 42fda66 | 2007-10-16 01:26:50 -0700 | [diff] [blame] | 17 | depends on STATIC_LINK |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | config LD_SCRIPT_DYN |
| 20 | bool |
| 21 | default y |
| 22 | depends on !LD_SCRIPT_STATIC |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | source "fs/Kconfig.binfmt" |
| 25 | |
| 26 | config HOSTFS |
| 27 | tristate "Host filesystem" |
| 28 | help |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 29 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 35 | mount none /tmp/fromhost -t hostfs -o /tmp/umlshare |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 37 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 41 | For more information, see |
| 42 | <http://user-mode-linux.sourceforge.net/hostfs.html>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 44 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | config MCONSOLE |
| 48 | bool "Management console" |
| 49 | default y |
| 50 | help |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 51 | The user mode linux management console is a low-level interface to |
| 52 | the kernel, somewhat like the i386 SysRq interface. Since there is |
| 53 | a full-blown operating system running under every user mode linux |
| 54 | instance, there is much greater flexibility possible than with the |
| 55 | SysRq mechanism. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 57 | If you answer 'Y' to this option, to use this feature, you need the |
| 58 | mconsole client (called uml_mconsole) which is present in CVS in |
| 59 | 2.4.5-9um and later (path /tools/mconsole), and is also in the |
| 60 | distribution RPM package in 2.4.6 and later. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 62 | It is safe to say 'Y' here. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | config MAGIC_SYSRQ |
| 65 | bool "Magic SysRq key" |
| 66 | depends on MCONSOLE |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 67 | help |
| 68 | If you say Y here, you will have some control over the system even |
| 69 | if the system crashes for example during kernel debugging (e.g., you |
| 70 | will be able to flush the buffer cache to disk, reboot the system |
| 71 | immediately or dump some status information). A key for each of the |
| 72 | possible requests is provided. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 74 | This is the feature normally accomplished by pressing a key |
| 75 | while holding SysRq (Alt+PrintScreen). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 77 | On UML, this is accomplished by sending a "sysrq" command with |
| 78 | mconsole, followed by the letter for the requested command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 80 | The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y |
| 81 | unless you really know what this hack does. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | config KERNEL_STACK_ORDER |
| 84 | int "Kernel stack size order" |
Jeff Dike | 02239c2 | 2007-05-10 22:22:35 -0700 | [diff] [blame] | 85 | default 1 if 64BIT |
Jeff Dike | e80ad9b | 2007-06-08 13:46:49 -0700 | [diff] [blame] | 86 | range 1 10 if 64BIT |
Jeff Dike | 02239c2 | 2007-05-10 22:22:35 -0700 | [diff] [blame] | 87 | default 0 if !64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | help |
Jeff Dike | 4c9e138 | 2007-10-16 01:26:54 -0700 | [diff] [blame] | 89 | This option determines the size of UML kernel stacks. They will |
| 90 | be 1 << order pages. The default is OK unless you're running Valgrind |
| 91 | on UML, in which case, set this to 3. |
FUJITA Tomonori | d911202 | 2010-10-26 14:22:18 -0700 | [diff] [blame] | 92 | |
Al Viro | d805a78 | 2011-08-18 20:13:00 +0100 | [diff] [blame] | 93 | config MMAPPER |
| 94 | tristate "iomem emulation driver" |
| 95 | help |
| 96 | This driver allows a host file to be used as emulated IO memory inside |
| 97 | UML. |
| 98 | |
FUJITA Tomonori | d911202 | 2010-10-26 14:22:18 -0700 | [diff] [blame] | 99 | config NO_DMA |
| 100 | def_bool y |
Kirill A. Shutemov | 6b8ce2a | 2015-04-14 15:46:11 -0700 | [diff] [blame] | 101 | |
| 102 | config PGTABLE_LEVELS |
| 103 | int |
| 104 | default 3 if 3_LEVEL_PGTABLES |
| 105 | default 2 |