1config DEFCONFIG_LIST 2 string 3 option defconfig_list 4 default "arch/$ARCH/defconfig" 5 6# UML uses the generic IRQ subsystem 7config GENERIC_HARDIRQS 8 bool 9 default y 10 11config UML 12 bool 13 default y 14 15config MMU 16 bool 17 default y 18 19config NO_IOMEM 20 def_bool y 21 22mainmenu "Linux/Usermode Kernel Configuration" 23 24config ISA 25 bool 26 27config SBUS 28 bool 29 30config PCI 31 bool 32 33config PCMCIA 34 bool 35 36# Yet to do! 37config TRACE_IRQFLAGS_SUPPORT 38 bool 39 default n 40 41config LOCKDEP_SUPPORT 42 bool 43 default y 44 45config STACKTRACE_SUPPORT 46 bool 47 default n 48 49config GENERIC_CALIBRATE_DELAY 50 bool 51 default y 52 53config GENERIC_BUG 54 bool 55 default y 56 depends on BUG 57 58config GENERIC_TIME 59 bool 60 default y 61 62config GENERIC_CLOCKEVENTS 63 bool 64 default y 65 66# Used in kernel/irq/manage.c and include/linux/irq.h 67config IRQ_RELEASE_METHOD 68 bool 69 default y 70 71config HZ 72 int 73 default 100 74 75menu "UML-specific options" 76 77config STATIC_LINK 78 bool "Force a static link" 79 default n 80 help 81 This option gives you the ability to force a static link of UML. 82 Normally, UML is linked as a shared binary. This is inconvenient for 83 use in a chroot jail. So, if you intend to run UML inside a chroot, 84 you probably want to say Y here. 85 Additionally, this option enables using higher memory spaces (up to 86 2.75G) for UML. 87 88source "arch/um/Kconfig.arch" 89source "mm/Kconfig" 90source "kernel/time/Kconfig" 91 92config LD_SCRIPT_STATIC 93 bool 94 default y 95 depends on STATIC_LINK 96 97config LD_SCRIPT_DYN 98 bool 99 default y 100 depends on !LD_SCRIPT_STATIC 101 102source "fs/Kconfig.binfmt" 103 104config HOSTFS 105 tristate "Host filesystem" 106 help 107 While the User-Mode Linux port uses its own root file system for 108 booting and normal file access, this module lets the UML user 109 access files stored on the host. It does not require any 110 network connection between the Host and UML. An example use of 111 this might be: 112 113 mount none /tmp/fromhost -t hostfs -o /tmp/umlshare 114 115 where /tmp/fromhost is an empty directory inside UML and 116 /tmp/umlshare is a directory on the host with files the UML user 117 wishes to access. 118 119 For more information, see 120 <http://user-mode-linux.sourceforge.net/hostfs.html>. 121 122 If you'd like to be able to work with files stored on the host, 123 say Y or M here; otherwise say N. 124 125config HPPFS 126 tristate "HoneyPot ProcFS (EXPERIMENTAL)" 127 depends on EXPERIMENTAL 128 help 129 hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc 130 entries to be overridden, removed, or fabricated from the host. 131 Its purpose is to allow a UML to appear to be a physical machine 132 by removing or changing anything in /proc which gives away the 133 identity of a UML. 134 135 See <http://user-mode-linux.sf.net/old/hppfs.html> for more information. 136 137 You only need this if you are setting up a UML honeypot. Otherwise, 138 it is safe to say 'N' here. 139 140config MCONSOLE 141 bool "Management console" 142 default y 143 help 144 The user mode linux management console is a low-level interface to 145 the kernel, somewhat like the i386 SysRq interface. Since there is 146 a full-blown operating system running under every user mode linux 147 instance, there is much greater flexibility possible than with the 148 SysRq mechanism. 149 150 If you answer 'Y' to this option, to use this feature, you need the 151 mconsole client (called uml_mconsole) which is present in CVS in 152 2.4.5-9um and later (path /tools/mconsole), and is also in the 153 distribution RPM package in 2.4.6 and later. 154 155 It is safe to say 'Y' here. 156 157config MAGIC_SYSRQ 158 bool "Magic SysRq key" 159 depends on MCONSOLE 160 help 161 If you say Y here, you will have some control over the system even 162 if the system crashes for example during kernel debugging (e.g., you 163 will be able to flush the buffer cache to disk, reboot the system 164 immediately or dump some status information). A key for each of the 165 possible requests is provided. 166 167 This is the feature normally accomplished by pressing a key 168 while holding SysRq (Alt+PrintScreen). 169 170 On UML, this is accomplished by sending a "sysrq" command with 171 mconsole, followed by the letter for the requested command. 172 173 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y 174 unless you really know what this hack does. 175 176config SMP 177 bool "Symmetric multi-processing support (EXPERIMENTAL)" 178 default n 179 depends on BROKEN 180 help 181 This option enables UML SMP support. 182 It is NOT related to having a real SMP box. Not directly, at least. 183 184 UML implements virtual SMP by allowing as many processes to run 185 simultaneously on the host as there are virtual processors configured. 186 187 Obviously, if the host is a uniprocessor, those processes will 188 timeshare, but, inside UML, will appear to be running simultaneously. 189 If the host is a multiprocessor, then UML processes may run 190 simultaneously, depending on the host scheduler. 191 192 This, however, is supported only in TT mode. So, if you use the SKAS 193 patch on your host, switching to TT mode and enabling SMP usually 194 gives you worse performances. 195 Also, since the support for SMP has been under-developed, there could 196 be some bugs being exposed by enabling SMP. 197 198 If you don't know what to do, say N. 199 200config NR_CPUS 201 int "Maximum number of CPUs (2-32)" 202 range 2 32 203 depends on SMP 204 default "32" 205 206config HIGHMEM 207 bool "Highmem support (EXPERIMENTAL)" 208 depends on !64BIT && EXPERIMENTAL 209 default n 210 help 211 This was used to allow UML to run with big amounts of memory. 212 Currently it is unstable, so if unsure say N. 213 214 To use big amounts of memory, it is recommended enable static 215 linking (i.e. CONFIG_STATIC_LINK) - this should allow the 216 guest to use up to 2.75G of memory. 217 218config KERNEL_STACK_ORDER 219 int "Kernel stack size order" 220 default 1 if 64BIT 221 range 1 10 if 64BIT 222 default 0 if !64BIT 223 help 224 This option determines the size of UML kernel stacks. They will 225 be 1 << order pages. The default is OK unless you're running Valgrind 226 on UML, in which case, set this to 3. 227 228endmenu 229 230source "init/Kconfig" 231 232source "drivers/block/Kconfig" 233 234source "arch/um/Kconfig.char" 235 236source "drivers/base/Kconfig" 237 238source "net/Kconfig" 239 240source "arch/um/Kconfig.net" 241 242source "drivers/net/Kconfig" 243 244source "drivers/connector/Kconfig" 245 246source "fs/Kconfig" 247 248source "security/Kconfig" 249 250source "crypto/Kconfig" 251 252source "lib/Kconfig" 253 254source "drivers/scsi/Kconfig" 255 256source "drivers/md/Kconfig" 257 258if BROKEN 259 source "drivers/mtd/Kconfig" 260endif 261 262source "drivers/leds/Kconfig" 263 264#This is just to shut up some Kconfig warnings, so no prompt. 265config INPUT 266 bool 267 default n 268 269source "arch/um/Kconfig.debug" 270