[linux-2.6-block.git] / arch / um / Kconfig.i386

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
Commit	Line	Data
85977376 PBG	1	menu "Host processor type and features"
	2
	3	source "arch/i386/Kconfig.cpu"
	4
	5	endmenu
	6
c45166be PBG	7	config UML_X86
	8	bool
	9	default y
	10
	11	config 64BIT
1da177e4 LT	12	bool
	13	default n
	14
52fdd089 BL	15	config SEMAPHORE_SLEEPERS
	16	bool
	17	default y
	18
c21be1c9 PBG	19	choice
	20	prompt "Host memory split"
	21	default HOST_VMSPLIT_3G
fe33f6f1 JD	22	help
	23	This is needed when the host kernel on which you run has a non-default
	24	(like 2G/2G) memory split, instead of the customary 3G/1G. If you did
	25	not recompile your own kernel but use the default distro's one, you can
	26	safely accept the "Default split" option.
c21be1c9	27
fe33f6f1 JD	28	It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
	29	CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
	30	patchset by Con Kolivas, or other ones) - option names match closely the
	31	host CONFIG_VM_SPLIT_* ones.
c21be1c9	32
fe33f6f1 JD	33	A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
	34	tolerate even more "normal" host kernels, but an higher setting will be
	35	stricter.
c21be1c9	36
fe33f6f1	37	So, if you do not know what to do here, say 'Default split'.
c21be1c9	38
b20c8453 AV	39	config HOST_VMSPLIT_3G
	40	bool "Default split (3G/1G user/kernel host split)"
	41	config HOST_VMSPLIT_3G_OPT
	42	bool "3G/1G user/kernel host split (for full 1G low memory)"
	43	config HOST_VMSPLIT_2G
	44	bool "2G/2G user/kernel host split"
	45	config HOST_VMSPLIT_1G
	46	bool "1G/3G user/kernel host split"
c21be1c9	47	endchoice
893bb96a	48
1da177e4	49	config TOP_ADDR
c21be1c9 PBG	50	hex
	51	default 0xB0000000 if HOST_VMSPLIT_3G_OPT
	52	default 0x78000000 if HOST_VMSPLIT_2G
	53	default 0x40000000 if HOST_VMSPLIT_1G
	54	default 0xC0000000
1da177e4 LT	55
1da177e4 LT	56	config 3_LEVEL_PGTABLES
ce2d2aed	57	bool "Three-level pagetables (EXPERIMENTAL)"
1da177e4	58	default n
ce2d2aed	59	depends on EXPERIMENTAL
1da177e4 LT	60	help
	61	Three-level pagetables will let UML have more than 4G of physical
	62	memory. All the memory that can't be mapped directly will be treated
	63	as high memory.
	64
ce2d2aed PBG	65	However, this it experimental on 32-bit architectures, so if unsure say
	66	N (on x86-64 it's automatically enabled, instead, as it's safe there).
	67
d67b569f JD	68	config STUB_CODE
d67b569f JD	69	hex
fe33f6f1 JD	70	default 0xbfffe000 if !HOST_VMSPLIT_2G
fe33f6f1 JD	71	default 0x7fffe000 if HOST_VMSPLIT_2G
d67b569f JD	72
	73	config STUB_DATA
	74	hex
fe33f6f1 JD	75	default 0xbffff000 if !HOST_VMSPLIT_2G
fe33f6f1 JD	76	default 0x7ffff000 if HOST_VMSPLIT_2G
d67b569f JD	77
	78	config STUB_START
	79	hex
	80	default STUB_CODE
	81
1da177e4 LT	82	config ARCH_HAS_SC_SIGNALS
	83	bool
	84	default y
	85
	86	config ARCH_REUSE_HOST_VSYSCALL_AREA
	87	bool
	88	default y
f214ef3e AM	89
	90	config GENERIC_HWEIGHT
	91	bool
	92	default y
	93