arch/um/Kconfig.i386

   1 menu "Host processor type and features"
   2
   3 source "arch/i386/Kconfig.cpu"
   4
   5 endmenu
   6
   7 config UML_X86
   8         bool
   9         default y
  10
  11 config 64BIT
  12         bool
  13         default n
  14
  15 config SEMAPHORE_SLEEPERS
  16         bool
  17         default y
  18
  19 config HOST_2G_2G
  20         bool "2G/2G host address space split"
  21         default n
  22         help
  23         This is needed when the host on which you run has a 2G/2G memory
  24         split, instead of the customary 3G/1G.
  25
  26         Note that to enable such a host
  27         configuration, which makes sense only in some cases, you need special
  28         host patches.
  29
  30         So, if you do not know what to do here, say 'N'.
  31
  32 config TOP_ADDR
  33         hex
  34         default 0xc0000000 if !HOST_2G_2G
  35         default 0x80000000 if HOST_2G_2G
  36
  37 config 3_LEVEL_PGTABLES
  38         bool "Three-level pagetables (EXPERIMENTAL)"
  39         default n
  40         depends on EXPERIMENTAL
  41         help
  42         Three-level pagetables will let UML have more than 4G of physical
  43         memory.  All the memory that can't be mapped directly will be treated
  44         as high memory.
  45
  46         However, this it experimental on 32-bit architectures, so if unsure say
  47         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  48
  49 config STUB_CODE
  50         hex
  51         default 0xbfffe000 if !HOST_2G_2G
  52         default 0x7fffe000 if HOST_2G_2G
  53
  54 config STUB_DATA
  55         hex
  56         default 0xbffff000 if !HOST_2G_2G
  57         default 0x7ffff000 if HOST_2G_2G
  58
  59 config STUB_START
  60         hex
  61         default STUB_CODE
  62
  63 config ARCH_HAS_SC_SIGNALS
  64         bool
  65         default y
  66
  67 config ARCH_REUSE_HOST_VSYSCALL_AREA
  68         bool
  69         default y
  70
  71 config GENERIC_HWEIGHT
  72         bool
  73         default y
  74