[mirror_ubuntu-bionic-kernel.git] / arch / x86 / um / Kconfig

mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"

source "arch/um/Kconfig.common"

menu "UML-specific options"

menu "Host processor type and features"

config CMPXCHG_LOCAL
	bool
	default n

config CMPXCHG_DOUBLE
	bool
	default n

source "arch/x86/Kconfig.cpu"

endmenu

config UML_X86
	def_bool y
	select GENERIC_FIND_FIRST_BIT

config 64BIT
	bool
	default SUBARCH = "x86_64"

config X86_32
	def_bool !64BIT
	select HAVE_AOUT

config X86_64
	def_bool 64BIT

config RWSEM_XCHGADD_ALGORITHM
	def_bool X86_XADD && 64BIT

config RWSEM_GENERIC_SPINLOCK
	def_bool !RWSEM_XCHGADD_ALGORITHM

config 3_LEVEL_PGTABLES
	bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
	default 64BIT
	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 ARCH_HAS_SC_SIGNALS
	def_bool !64BIT

config ARCH_REUSE_HOST_VSYSCALL_AREA
	def_bool !64BIT

config GENERIC_HWEIGHT
	def_bool y

source "arch/um/Kconfig.um"

endmenu

source "arch/um/Kconfig.rest"
Commit	Line	Data
7fa38e7e GU	1	mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"
7fa38e7e GU	2
61bee204 AV	3	source "arch/um/Kconfig.common"
	4
	5	menu "UML-specific options"
	6
85977376 PBG	7	menu "Host processor type and features"
85977376 PBG	8
084189a8 RW	9	config CMPXCHG_LOCAL
	10	bool
	11	default n
e5f0bdc7 TLSC	12
	13	config CMPXCHG_DOUBLE
	14	bool
	15	default n
084189a8	16
7a78a172	17	source "arch/x86/Kconfig.cpu"
85977376 PBG	18
	19	endmenu
	20
c45166be	21	config UML_X86
4198426a	22	def_bool y
c49aa5bd	23	select GENERIC_FIND_FIRST_BIT
4198426a AV	24
4198426a AV	25	config 64BIT
c45166be	26	bool
4198426a	27	default SUBARCH = "x86_64"
c45166be	28
54d67ee2	29	config X86_32
4198426a AV	30	def_bool !64BIT
4198426a AV	31	select HAVE_AOUT
54d67ee2	32
bfc39061 JB	33	config X86_64
	34	def_bool 64BIT
	35
54d67ee2	36	config RWSEM_XCHGADD_ALGORITHM
3a367907	37	def_bool X86_XADD && 64BIT
54d67ee2	38
4198426a	39	config RWSEM_GENERIC_SPINLOCK
3a367907	40	def_bool !RWSEM_XCHGADD_ALGORITHM
1da177e4	41
1da177e4	42	config 3_LEVEL_PGTABLES
4198426a AV	43	bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
4198426a AV	44	default 64BIT
ce2d2aed	45	depends on EXPERIMENTAL
1da177e4 LT	46	help
	47	Three-level pagetables will let UML have more than 4G of physical
	48	memory. All the memory that can't be mapped directly will be treated
	49	as high memory.
	50
ce2d2aed PBG	51	However, this it experimental on 32-bit architectures, so if unsure say
	52	N (on x86-64 it's automatically enabled, instead, as it's safe there).
	53
1da177e4	54	config ARCH_HAS_SC_SIGNALS
4198426a	55	def_bool !64BIT
1da177e4 LT	56
1da177e4 LT	57	config ARCH_REUSE_HOST_VSYSCALL_AREA
4198426a AV	58	def_bool !64BIT
4198426a AV	59
f214ef3e	60	config GENERIC_HWEIGHT
4198426a	61	def_bool y
61bee204 AV	62
	63	source "arch/um/Kconfig.um"
	64
	65	endmenu
	66
	67	source "arch/um/Kconfig.rest"