| 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 |
| |
| choice |
| prompt "Host memory split" |
| default HOST_VMSPLIT_3G |
| help |
| This is needed when the host kernel on which you run has a non-default |
| (like 2G/2G) memory split, instead of the customary 3G/1G. If you did |
| not recompile your own kernel but use the default distro's one, you can |
| safely accept the "Default split" option. |
| |
| It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via |
| CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck |
| patchset by Con Kolivas, or other ones) - option names match closely the |
| host CONFIG_VM_SPLIT_* ones. |
| |
| A lower setting (where 1G/3G is lowest and 3G/1G is higher) will |
| tolerate even more "normal" host kernels, but an higher setting will be |
| stricter. |
| |
| So, if you do not know what to do here, say 'Default split'. |
| |
| config HOST_VMSPLIT_3G |
| bool "Default split (3G/1G user/kernel host split)" |
| config HOST_VMSPLIT_3G_OPT |
| bool "3G/1G user/kernel host split (for full 1G low memory)" |
| config HOST_VMSPLIT_2G |
| bool "2G/2G user/kernel host split" |
| config HOST_VMSPLIT_1G |
| bool "1G/3G user/kernel host split" |
| endchoice |
| |
| config TOP_ADDR |
| hex |
| default 0xB0000000 if HOST_VMSPLIT_3G_OPT |
| default 0x78000000 if HOST_VMSPLIT_2G |
| default 0x40000000 if HOST_VMSPLIT_1G |
| default 0xC0000000 |
| |
| 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 if !HOST_VMSPLIT_2G |
| default 0x7fffe000 if HOST_VMSPLIT_2G |
| |
| config STUB_DATA |
| hex |
| default 0xbffff000 if !HOST_VMSPLIT_2G |
| default 0x7ffff000 if HOST_VMSPLIT_2G |
| |
| config STUB_START |
| hex |
| default STUB_CODE |
| |
| config ARCH_HAS_SC_SIGNALS |
| bool |
| default y |
| |
| config ARCH_REUSE_HOST_VSYSCALL_AREA |
| bool |
| default y |
| |
| config GENERIC_HWEIGHT |
| bool |
| default y |
| |
