arch/x86/um/Kconfig

   1 mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"
   2
   3 source "arch/um/Kconfig.common"
   4
   5 menu "UML-specific options"
   6
   7 menu "Host processor type and features"
   8
   9 source "arch/x86/Kconfig.cpu"
  10
  11 endmenu
  12
  13 config UML_X86
  14         def_bool y
  15         select GENERIC_FIND_FIRST_BIT
  16         select GENERIC_KERNEL_THREAD
  17         select GENERIC_KERNEL_EXECVE
  18
  19 config 64BIT
  20         bool "64-bit kernel" if SUBARCH = "x86"
  21         default SUBARCH != "i386"
  22
  23 config X86_32
  24         def_bool !64BIT
  25         select HAVE_AOUT
  26         select ARCH_WANT_IPC_PARSE_VERSION
  27         select MODULES_USE_ELF_REL
  28
  29 config X86_64
  30         def_bool 64BIT
  31         select MODULES_USE_ELF_RELA
  32
  33 config RWSEM_XCHGADD_ALGORITHM
  34         def_bool X86_XADD && 64BIT
  35
  36 config RWSEM_GENERIC_SPINLOCK
  37         def_bool !RWSEM_XCHGADD_ALGORITHM
  38
  39 config 3_LEVEL_PGTABLES
  40         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  41         default 64BIT
  42         depends on EXPERIMENTAL
  43         help
  44         Three-level pagetables will let UML have more than 4G of physical
  45         memory.  All the memory that can't be mapped directly will be treated
  46         as high memory.
  47
  48         However, this it experimental on 32-bit architectures, so if unsure say
  49         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  50
  51 config ARCH_HAS_SC_SIGNALS
  52         def_bool !64BIT
  53
  54 config ARCH_REUSE_HOST_VSYSCALL_AREA
  55         def_bool !64BIT
  56
  57 config GENERIC_HWEIGHT
  58         def_bool y
  59
  60 source "arch/um/Kconfig.um"
  61
  62 endmenu
  63
  64 source "arch/um/Kconfig.rest"