[linux.git] / arch / sparc64 / Kconfig

# $Id: config.in,v 1.158 2002/01/24 22:14:44 davem Exp $
# For a description of the syntax of this configuration file,
# see the Configure script.
#

mainmenu "Linux/UltraSPARC Kernel Configuration"

config SPARC
	bool
	default y

config SPARC64
	bool
	default y
	help
	  SPARC is a family of RISC microprocessors designed and marketed by
	  Sun Microsystems, incorporated.  This port covers the newer 64-bit
	  UltraSPARC.  The UltraLinux project maintains both the SPARC32 and
	  SPARC64 ports; its web page is available at
	  <http://www.ultralinux.org/>.

config 64BIT
	def_bool y

config MMU
	bool
	default y

config STACKTRACE_SUPPORT
	bool
	default y

config LOCKDEP_SUPPORT
	bool
	default y

config TIME_INTERPOLATION
	bool
	default y

config ARCH_MAY_HAVE_PC_FDC
	bool
	default y

config ARCH_HAS_ILOG2_U32
	bool
	default n

config ARCH_HAS_ILOG2_U64
	bool
	default n

config AUDIT_ARCH
	bool
	default y

choice
	prompt "Kernel page size"
	default SPARC64_PAGE_SIZE_8KB

config SPARC64_PAGE_SIZE_8KB
	bool "8KB"
	help
	  This lets you select the page size of the kernel.

	  8KB and 64KB work quite well, since Sparc ELF sections
	  provide for up to 64KB alignment.

	  Therefore, 512KB and 4MB are for expert hackers only.

	  If you don't know what to do, choose 8KB.

config SPARC64_PAGE_SIZE_64KB
	bool "64KB"

config SPARC64_PAGE_SIZE_512KB
	bool "512KB"

config SPARC64_PAGE_SIZE_4MB
	bool "4MB"

endchoice

config SECCOMP
	bool "Enable seccomp to safely compute untrusted bytecode"
	depends on PROC_FS
	default y
	help
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via /proc/<pid>/seccomp, it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

	  If unsure, say Y. Only embedded should say N here.

source kernel/Kconfig.hz

source "init/Kconfig"

config SYSVIPC_COMPAT
	bool
	depends on COMPAT && SYSVIPC
	default y

config GENERIC_HARDIRQS
	bool
	default y

menu "General machine setup"

config SMP
	bool "Symmetric multi-processing support"
	---help---
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, say N. If you have a system with more than
	  one CPU, say Y.

	  If you say N here, the kernel will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all,
	  singleprocessor machines. On a singleprocessor machine, the kernel
	  will run faster if you say N here.

	  People using multiprocessor machines who say Y here should also say
	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
	  Management" code will be disabled if you say Y here.

	  See also the <file:Documentation/smp.txt>,
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
	  <http://www.tldp.org/docs.html#howto>.

	  If you don't know what to do here, say N.

config PREEMPT
	bool "Preemptible Kernel"
	help
	  This option reduces the latency of the kernel when reacting to
	  real-time or interactive events by allowing a low priority process to
	  be preempted even if it is in kernel mode executing a system call.
	  This allows applications to run more reliably even when the system is
	  under load.

	  Say Y here if you are building a kernel for a desktop, embedded
	  or real-time system.  Say N if you are unsure.

config NR_CPUS
	int "Maximum number of CPUs (2-64)"
	range 2 64
	depends on SMP
	default "32"

source "drivers/cpufreq/Kconfig"

config US3_FREQ
	tristate "UltraSPARC-III CPU Frequency driver"
	depends on CPU_FREQ
	select CPU_FREQ_TABLE
	help
	  This adds the CPUFreq driver for UltraSPARC-III processors.

	  For details, take a look at <file:Documentation/cpu-freq>.

	  If in doubt, say N.

config US2E_FREQ
	tristate "UltraSPARC-IIe CPU Frequency driver"
	depends on CPU_FREQ
	select CPU_FREQ_TABLE
	help
	  This adds the CPUFreq driver for UltraSPARC-IIe processors.

	  For details, take a look at <file:Documentation/cpu-freq>.

	  If in doubt, say N.

# Global things across all Sun machines.
config RWSEM_GENERIC_SPINLOCK
	bool

config RWSEM_XCHGADD_ALGORITHM
	bool
	default y

config GENERIC_FIND_NEXT_BIT
	bool
	default y

config GENERIC_HWEIGHT
	bool
	default y if !ULTRA_HAS_POPULATION_COUNT

config GENERIC_CALIBRATE_DELAY
	bool
	default y

choice
	prompt "SPARC64 Huge TLB Page Size"
	depends on HUGETLB_PAGE
	default HUGETLB_PAGE_SIZE_4MB

config HUGETLB_PAGE_SIZE_4MB
	bool "4MB"

config HUGETLB_PAGE_SIZE_512K
	depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
	bool "512K"

config HUGETLB_PAGE_SIZE_64K
Commit	Line	Data
1da177e4 LT	1	# $Id: config.in,v 1.158 2002/01/24 22:14:44 davem Exp $
	2	# For a description of the syntax of this configuration file,
	3	# see the Configure script.
	4	#
	5
	6	mainmenu "Linux/UltraSPARC Kernel Configuration"
	7
0b57ee9e AB	8	config SPARC
	9	bool
	10	default y
	11
5843e37e DM	12	config SPARC64
	13	bool
	14	default y
	15	help
	16	SPARC is a family of RISC microprocessors designed and marketed by
	17	Sun Microsystems, incorporated. This port covers the newer 64-bit
	18	UltraSPARC. The UltraLinux project maintains both the SPARC32 and
	19	SPARC64 ports; its web page is available at
	20	<http://www.ultralinux.org/>.
	21
1da177e4 LT	22	config 64BIT
	23	def_bool y
	24
	25	config MMU
	26	bool
	27	default y
	28
10e26723 DM	29	config STACKTRACE_SUPPORT
	30	bool
	31	default y
	32
	33	config LOCKDEP_SUPPORT
	34	bool
	35	default y
	36
1da177e4 LT	37	config TIME_INTERPOLATION
	38	bool
	39	default y
	40
a08b6b79 AV	41	config ARCH_MAY_HAVE_PC_FDC
	42	bool
	43	default y
	44
f0d1b0b3 DH	45	config ARCH_HAS_ILOG2_U32
	46	bool
	47	default n
	48
	49	config ARCH_HAS_ILOG2_U64
	50	bool
	51	default n
	52
f6bc0c1c AV	53	config AUDIT_ARCH
	54	bool
	55	default y
	56
1da177e4 LT	57	choice
	58	prompt "Kernel page size"
	59	default SPARC64_PAGE_SIZE_8KB
	60
	61	config SPARC64_PAGE_SIZE_8KB
	62	bool "8KB"
	63	help
	64	This lets you select the page size of the kernel.
	65
	66	8KB and 64KB work quite well, since Sparc ELF sections
	67	provide for up to 64KB alignment.
	68
	69	Therefore, 512KB and 4MB are for expert hackers only.
	70
	71	If you don't know what to do, choose 8KB.
	72
	73	config SPARC64_PAGE_SIZE_64KB
	74	bool "64KB"
	75
	76	config SPARC64_PAGE_SIZE_512KB
	77	bool "512KB"
	78
	79	config SPARC64_PAGE_SIZE_4MB
	80	bool "4MB"
	81
	82	endchoice
	83
bb49bcda DM	84	config SECCOMP
	85	bool "Enable seccomp to safely compute untrusted bytecode"
	86	depends on PROC_FS
	87	default y
	88	help
	89	This kernel feature is useful for number crunching applications
	90	that may need to compute untrusted bytecode during their
	91	execution. By using pipes or other transports made available to
	92	the process as file descriptors supporting the read/write
	93	syscalls, it's possible to isolate those applications in
	94	their own address space using seccomp. Once seccomp is
	95	enabled via /proc/<pid>/seccomp, it cannot be disabled
	96	and the task is only allowed to execute a few safe syscalls
	97	defined by each seccomp mode.
	98
	99	If unsure, say Y. Only embedded should say N here.
	100
a6524813 DM	101	source kernel/Kconfig.hz
a6524813 DM	102
1da177e4 LT	103	source "init/Kconfig"
	104
	105	config SYSVIPC_COMPAT
	106	bool
	107	depends on COMPAT && SYSVIPC
	108	default y
	109
e18e2a00 DM	110	config GENERIC_HARDIRQS
	111	bool
	112	default y
	113
1da177e4 LT	114	menu "General machine setup"
1da177e4 LT	115
1da177e4 LT	116	config SMP
	117	bool "Symmetric multi-processing support"
	118	---help---
	119	This enables support for systems with more than one CPU. If you have
	120	a system with only one CPU, say N. If you have a system with more than
	121	one CPU, say Y.
	122
	123	If you say N here, the kernel will run on single and multiprocessor
	124	machines, but will use only one CPU of a multiprocessor machine. If
	125	you say Y here, the kernel will run on many, but not all,
	126	singleprocessor machines. On a singleprocessor machine, the kernel
	127	will run faster if you say N here.
	128
	129	People using multiprocessor machines who say Y here should also say
	130	Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
	131	Management" code will be disabled if you say Y here.
	132
	133	See also the <file:Documentation/smp.txt>,
	134	<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
	135	<http://www.tldp.org/docs.html#howto>.
	136
	137	If you don't know what to do here, say N.
	138
	139	config PREEMPT
	140	bool "Preemptible Kernel"
	141	help
	142	This option reduces the latency of the kernel when reacting to
	143	real-time or interactive events by allowing a low priority process to
	144	be preempted even if it is in kernel mode executing a system call.
	145	This allows applications to run more reliably even when the system is
	146	under load.
	147
	148	Say Y here if you are building a kernel for a desktop, embedded
	149	or real-time system. Say N if you are unsure.
	150
	151	config NR_CPUS
	152	int "Maximum number of CPUs (2-64)"
	153	range 2 64
	154	depends on SMP
	155	default "32"
	156
	157	source "drivers/cpufreq/Kconfig"
	158
	159	config US3_FREQ
	160	tristate "UltraSPARC-III CPU Frequency driver"
	161	depends on CPU_FREQ
	162	select CPU_FREQ_TABLE
	163	help
	164	This adds the CPUFreq driver for UltraSPARC-III processors.
	165
	166	For details, take a look at <file:Documentation/cpu-freq>.
	167
	168	If in doubt, say N.
	169
	170	config US2E_FREQ
	171	tristate "UltraSPARC-IIe CPU Frequency driver"
	172	depends on CPU_FREQ
	173	select CPU_FREQ_TABLE
	174	help
	175	This adds the CPUFreq driver for UltraSPARC-IIe processors.
	176
	177	For details, take a look at <file:Documentation/cpu-freq>.
	178
	179	If in doubt, say N.
180
1da177e4 LT	181	# Global things across all Sun machines.
	182	config RWSEM_GENERIC_SPINLOCK
	183	bool
	184
	185	config RWSEM_XCHGADD_ALGORITHM
	186	bool
	187	default y
	188
2d78d4be AM	189	config GENERIC_FIND_NEXT_BIT
	190	bool
	191	default y
	192
	193	config GENERIC_HWEIGHT
	194	bool
	195	default y if !ULTRA_HAS_POPULATION_COUNT
	196
1da177e4 LT	197	config GENERIC_CALIBRATE_DELAY
	198	bool
	199	default y
	200
	201	choice
	202	prompt "SPARC64 Huge TLB Page Size"
	203	depends on HUGETLB_PAGE
	204	default HUGETLB_PAGE_SIZE_4MB
	205
	206	config HUGETLB_PAGE_SIZE_4MB
	207	bool "4MB"
	208
	209	config HUGETLB_PAGE_SIZE_512K
dcc1e8dd	210	depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
1da177e4 LT	211	bool "512K"
	212
	213	config HUGETLB_PAGE_SIZE_64K