linux-sg2042/arch/um/Kconfig.i386

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menu "Host processor type and features"
source "arch/i386/Kconfig.cpu"
endmenu
config UML_X86
bool
default y
config 64BIT
bool
default n
config SEMAPHORE_SLEEPERS
bool
default y
config TOP_ADDR
hex
default 0xc0000000 if !HOST_2G_2G
default 0x80000000 if HOST_2G_2G
config 3_LEVEL_PGTABLES
bool "Three-level pagetables (EXPERIMENTAL)"
default n
depends on EXPERIMENTAL
help
Three-level pagetables will let UML have more than 4G of physical
memory. All the memory that can't be mapped directly will be treated
as high memory.
However, this it experimental on 32-bit architectures, so if unsure say
N (on x86-64 it's automatically enabled, instead, as it's safe there).
config STUB_CODE
hex
default 0xbfffe000
config STUB_DATA
hex
default 0xbffff000
config STUB_START
hex
default STUB_CODE
config ARCH_HAS_SC_SIGNALS
bool
default y
config ARCH_REUSE_HOST_VSYSCALL_AREA
bool
default y