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

source "arch/um/Kconfig.common"

menu "UML-specific options"

menu "Host processor type and features"

config CMPXCHG_LOCAL
	bool
	default n

source "arch/x86/Kconfig.cpu"

endmenu

config UML_X86
	def_bool y
	select GENERIC_FIND_FIRST_BIT
	select GENERIC_FIND_NEXT_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 SMP_BROKEN
	def_bool 64BIT

config GENERIC_HWEIGHT
	def_bool y

source "arch/um/Kconfig.um"

endmenu

source "arch/um/Kconfig.rest"
Commit	Line	Data
61bee204 AV	1	source "arch/um/Kconfig.common"
	2
	3	menu "UML-specific options"
	4
85977376 PBG	5	menu "Host processor type and features"
85977376 PBG	6
084189a8 RW	7	config CMPXCHG_LOCAL
	8	bool
	9	default n
	10
7a78a172	11	source "arch/x86/Kconfig.cpu"
85977376 PBG	12
	13	endmenu
	14
c45166be	15	config UML_X86
4198426a	16	def_bool y
c49aa5bd JB	17	select GENERIC_FIND_FIRST_BIT
c49aa5bd JB	18	select GENERIC_FIND_NEXT_BIT
4198426a AV	19
4198426a AV	20	config 64BIT
c45166be	21	bool
4198426a	22	default SUBARCH = "x86_64"
c45166be	23
54d67ee2	24	config X86_32
4198426a AV	25	def_bool !64BIT
4198426a AV	26	select HAVE_AOUT
54d67ee2	27
bfc39061 JB	28	config X86_64
	29	def_bool 64BIT
	30
54d67ee2	31	config RWSEM_XCHGADD_ALGORITHM
3a367907	32	def_bool X86_XADD && 64BIT
54d67ee2	33
4198426a	34	config RWSEM_GENERIC_SPINLOCK
3a367907	35	def_bool !RWSEM_XCHGADD_ALGORITHM
1da177e4	36
1da177e4	37	config 3_LEVEL_PGTABLES
4198426a AV	38	bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
4198426a AV	39	default 64BIT
ce2d2aed	40	depends on EXPERIMENTAL
1da177e4 LT	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
ce2d2aed PBG	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
1da177e4	49	config ARCH_HAS_SC_SIGNALS
4198426a	50	def_bool !64BIT
1da177e4 LT	51
1da177e4 LT	52	config ARCH_REUSE_HOST_VSYSCALL_AREA
4198426a AV	53	def_bool !64BIT
	54
	55	config SMP_BROKEN
	56	def_bool 64BIT
f214ef3e AM	57
f214ef3e AM	58	config GENERIC_HWEIGHT
4198426a	59	def_bool y
61bee204 AV	60
	61	source "arch/um/Kconfig.um"
	62
	63	endmenu
	64
	65	source "arch/um/Kconfig.rest"