2005-04-17 06:20:36 +08:00
|
|
|
#
|
|
|
|
# For a description of the syntax of this configuration file,
|
|
|
|
# see Documentation/kbuild/kconfig-language.txt.
|
|
|
|
#
|
|
|
|
|
|
|
|
config MMU
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
|
|
|
config RWSEM_GENERIC_SPINLOCK
|
|
|
|
bool
|
|
|
|
|
|
|
|
config RWSEM_XCHGADD_ALGORITHM
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
|
|
|
config GENERIC_CALIBRATE_DELAY
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
|
|
|
config GENERIC_BUST_SPINLOCK
|
|
|
|
bool
|
|
|
|
|
|
|
|
mainmenu "Linux Kernel Configuration"
|
|
|
|
|
2006-01-06 16:19:28 +08:00
|
|
|
config S390
|
2005-04-17 06:20:36 +08:00
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
|
|
|
source "init/Kconfig"
|
|
|
|
|
|
|
|
menu "Base setup"
|
|
|
|
|
|
|
|
comment "Processor type and features"
|
|
|
|
|
2006-01-06 16:19:28 +08:00
|
|
|
config 64BIT
|
2005-04-17 06:20:36 +08:00
|
|
|
bool "64 bit kernel"
|
|
|
|
help
|
|
|
|
Select this option if you have a 64 bit IBM zSeries machine
|
|
|
|
and want to use the 64 bit addressing mode.
|
|
|
|
|
|
|
|
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, like most personal computers, 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.
|
|
|
|
|
|
|
|
See also the <file:Documentation/smp.txt> and the SMP-HOWTO
|
|
|
|
available at <http://www.tldp.org/docs.html#howto>.
|
|
|
|
|
|
|
|
Even if you don't know what to do here, say Y.
|
|
|
|
|
|
|
|
config NR_CPUS
|
|
|
|
int "Maximum number of CPUs (2-64)"
|
|
|
|
range 2 64
|
|
|
|
depends on SMP
|
|
|
|
default "32"
|
|
|
|
help
|
|
|
|
This allows you to specify the maximum number of CPUs which this
|
|
|
|
kernel will support. The maximum supported value is 64 and the
|
|
|
|
minimum value which makes sense is 2.
|
|
|
|
|
|
|
|
This is purely to save memory - each supported CPU adds
|
|
|
|
approximately sixteen kilobytes to the kernel image.
|
|
|
|
|
|
|
|
config HOTPLUG_CPU
|
|
|
|
bool "Support for hot-pluggable CPUs"
|
|
|
|
depends on SMP
|
|
|
|
select HOTPLUG
|
|
|
|
default n
|
|
|
|
help
|
|
|
|
Say Y here to be able to turn CPUs off and on. CPUs
|
|
|
|
can be controlled through /sys/devices/system/cpu/cpu#.
|
|
|
|
Say N if you want to disable CPU hotplug.
|
|
|
|
|
2006-02-18 05:52:44 +08:00
|
|
|
config DEFAULT_MIGRATION_COST
|
|
|
|
int
|
|
|
|
default "1000000"
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
config MATHEMU
|
|
|
|
bool "IEEE FPU emulation"
|
|
|
|
depends on MARCH_G5
|
|
|
|
help
|
|
|
|
This option is required for IEEE compliant floating point arithmetic
|
|
|
|
on older S/390 machines. Say Y unless you know your machine doesn't
|
|
|
|
need this.
|
|
|
|
|
2006-01-06 16:19:28 +08:00
|
|
|
config COMPAT
|
2005-04-17 06:20:36 +08:00
|
|
|
bool "Kernel support for 31 bit emulation"
|
2006-01-06 16:19:28 +08:00
|
|
|
depends on 64BIT
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
Select this option if you want to enable your system kernel to
|
|
|
|
handle system-calls from ELF binaries for 31 bit ESA. This option
|
|
|
|
(and some other stuff like libraries and such) is needed for
|
|
|
|
executing 31 bit applications. It is safe to say "Y".
|
|
|
|
|
|
|
|
config SYSVIPC_COMPAT
|
|
|
|
bool
|
|
|
|
depends on COMPAT && SYSVIPC
|
|
|
|
default y
|
|
|
|
|
|
|
|
config BINFMT_ELF32
|
|
|
|
tristate "Kernel support for 31 bit ELF binaries"
|
2006-01-06 16:19:28 +08:00
|
|
|
depends on COMPAT
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
This allows you to run 32-bit Linux/ELF binaries on your zSeries
|
|
|
|
in 64 bit mode. Everybody wants this; say Y.
|
|
|
|
|
|
|
|
comment "Code generation options"
|
|
|
|
|
|
|
|
choice
|
|
|
|
prompt "Processor type"
|
|
|
|
default MARCH_G5
|
|
|
|
|
|
|
|
config MARCH_G5
|
|
|
|
bool "S/390 model G5 and G6"
|
2006-01-06 16:19:28 +08:00
|
|
|
depends on !64BIT
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
Select this to build a 31 bit kernel that works
|
|
|
|
on all S/390 and zSeries machines.
|
|
|
|
|
|
|
|
config MARCH_Z900
|
|
|
|
bool "IBM eServer zSeries model z800 and z900"
|
|
|
|
help
|
|
|
|
Select this to optimize for zSeries machines. This
|
|
|
|
will enable some optimizations that are not available
|
|
|
|
on older 31 bit only CPUs.
|
|
|
|
|
|
|
|
config MARCH_Z990
|
|
|
|
bool "IBM eServer zSeries model z890 and z990"
|
|
|
|
help
|
|
|
|
Select this enable optimizations for model z890/z990.
|
|
|
|
This will be slightly faster but does not work on
|
|
|
|
older machines such as the z900.
|
|
|
|
|
|
|
|
endchoice
|
|
|
|
|
|
|
|
config PACK_STACK
|
|
|
|
bool "Pack kernel stack"
|
|
|
|
help
|
|
|
|
This option enables the compiler option -mkernel-backchain if it
|
|
|
|
is available. If the option is available the compiler supports
|
|
|
|
the new stack layout which dramatically reduces the minimum stack
|
|
|
|
frame size. With an old compiler a non-leaf function needs a
|
|
|
|
minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
|
|
|
|
-mkernel-backchain the minimum size drops to 16 byte on 31 bit
|
|
|
|
and 24 byte on 64 bit.
|
|
|
|
|
|
|
|
Say Y if you are unsure.
|
|
|
|
|
|
|
|
config SMALL_STACK
|
|
|
|
bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb"
|
|
|
|
depends on PACK_STACK
|
|
|
|
help
|
|
|
|
If you say Y here and the compiler supports the -mkernel-backchain
|
|
|
|
option the kernel will use a smaller kernel stack size. For 31 bit
|
|
|
|
the reduced size is 4kb instead of 8kb and for 64 bit it is 8kb
|
|
|
|
instead of 16kb. This allows to run more thread on a system and
|
|
|
|
reduces the pressure on the memory management for higher order
|
|
|
|
page allocations.
|
|
|
|
|
|
|
|
Say N if you are unsure.
|
|
|
|
|
|
|
|
|
|
|
|
config CHECK_STACK
|
|
|
|
bool "Detect kernel stack overflow"
|
|
|
|
help
|
|
|
|
This option enables the compiler option -mstack-guard and
|
|
|
|
-mstack-size if they are available. If the compiler supports them
|
|
|
|
it will emit additional code to each function prolog to trigger
|
|
|
|
an illegal operation if the kernel stack is about to overflow.
|
|
|
|
|
|
|
|
Say N if you are unsure.
|
|
|
|
|
|
|
|
config STACK_GUARD
|
|
|
|
int "Size of the guard area (128-1024)"
|
|
|
|
range 128 1024
|
|
|
|
depends on CHECK_STACK
|
|
|
|
default "256"
|
|
|
|
help
|
|
|
|
This allows you to specify the size of the guard area at the lower
|
|
|
|
end of the kernel stack. If the kernel stack points into the guard
|
|
|
|
area on function entry an illegal operation is triggered. The size
|
|
|
|
needs to be a power of 2. Please keep in mind that the size of an
|
|
|
|
interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
|
|
|
|
The minimum size for the stack guard should be 256 for 31 bit and
|
|
|
|
512 for 64 bit.
|
|
|
|
|
|
|
|
config WARN_STACK
|
|
|
|
bool "Emit compiler warnings for function with broken stack usage"
|
|
|
|
help
|
|
|
|
This option enables the compiler options -mwarn-framesize and
|
|
|
|
-mwarn-dynamicstack. If the compiler supports these options it
|
|
|
|
will generate warnings for function which either use alloca or
|
|
|
|
create a stack frame bigger then CONFIG_WARN_STACK_SIZE.
|
|
|
|
|
|
|
|
Say N if you are unsure.
|
|
|
|
|
|
|
|
config WARN_STACK_SIZE
|
|
|
|
int "Maximum frame size considered safe (128-2048)"
|
|
|
|
range 128 2048
|
|
|
|
depends on WARN_STACK
|
|
|
|
default "256"
|
|
|
|
help
|
|
|
|
This allows you to specify the maximum frame size a function may
|
|
|
|
have without the compiler complaining about it.
|
|
|
|
|
2005-06-23 15:07:43 +08:00
|
|
|
source "mm/Kconfig"
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
comment "I/O subsystem configuration"
|
|
|
|
|
|
|
|
config MACHCHK_WARNING
|
|
|
|
bool "Process warning machine checks"
|
|
|
|
help
|
|
|
|
Select this option if you want the machine check handler on IBM S/390 or
|
|
|
|
zSeries to process warning machine checks (e.g. on power failures).
|
|
|
|
If unsure, say "Y".
|
|
|
|
|
|
|
|
config QDIO
|
|
|
|
tristate "QDIO support"
|
|
|
|
---help---
|
2006-01-06 16:19:20 +08:00
|
|
|
This driver provides the Queued Direct I/O base support for
|
|
|
|
IBM mainframes.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
For details please refer to the documentation provided by IBM at
|
|
|
|
<http://www10.software.ibm.com/developerworks/opensource/linux390>
|
|
|
|
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
|
|
module will be called qdio.
|
|
|
|
|
|
|
|
If unsure, say Y.
|
|
|
|
|
|
|
|
config QDIO_PERF_STATS
|
|
|
|
bool "Performance statistics in /proc"
|
|
|
|
depends on QDIO
|
|
|
|
help
|
|
|
|
Say Y here to get performance statistics in /proc/qdio_perf
|
|
|
|
|
|
|
|
If unsure, say N.
|
|
|
|
|
|
|
|
config QDIO_DEBUG
|
|
|
|
bool "Extended debugging information"
|
|
|
|
depends on QDIO
|
|
|
|
help
|
2006-01-06 16:19:20 +08:00
|
|
|
Say Y here to get extended debugging output in
|
|
|
|
/sys/kernel/debug/s390dbf/qdio...
|
2005-04-17 06:20:36 +08:00
|
|
|
Warning: this option reduces the performance of the QDIO module.
|
|
|
|
|
|
|
|
If unsure, say N.
|
|
|
|
|
|
|
|
comment "Misc"
|
|
|
|
|
|
|
|
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 N if you are unsure.
|
|
|
|
|
|
|
|
config IPL
|
|
|
|
bool "Builtin IPL record support"
|
|
|
|
help
|
|
|
|
If you want to use the produced kernel to IPL directly from a
|
|
|
|
device, you have to merge a bootsector specific to the device
|
|
|
|
into the first bytes of the kernel. You will have to select the
|
|
|
|
IPL device.
|
|
|
|
|
|
|
|
choice
|
|
|
|
prompt "IPL method generated into head.S"
|
|
|
|
depends on IPL
|
|
|
|
default IPL_TAPE
|
|
|
|
help
|
|
|
|
Select "tape" if you want to IPL the image from a Tape.
|
|
|
|
|
|
|
|
Select "vm_reader" if you are running under VM/ESA and want
|
|
|
|
to IPL the image from the emulated card reader.
|
|
|
|
|
|
|
|
config IPL_TAPE
|
|
|
|
bool "tape"
|
|
|
|
|
|
|
|
config IPL_VM
|
|
|
|
bool "vm_reader"
|
|
|
|
|
|
|
|
endchoice
|
|
|
|
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
|
|
|
|
config PROCESS_DEBUG
|
|
|
|
bool "Show crashed user process info"
|
|
|
|
help
|
|
|
|
Say Y to print all process fault locations to the console. This is
|
|
|
|
a debugging option; you probably do not want to set it unless you
|
|
|
|
are an S390 port maintainer.
|
|
|
|
|
|
|
|
config PFAULT
|
|
|
|
bool "Pseudo page fault support"
|
|
|
|
help
|
|
|
|
Select this option, if you want to use PFAULT pseudo page fault
|
|
|
|
handling under VM. If running native or in LPAR, this option
|
|
|
|
has no effect. If your VM does not support PFAULT, PAGEEX
|
|
|
|
pseudo page fault handling will be used.
|
|
|
|
Note that VM 4.2 supports PFAULT but has a bug in its
|
|
|
|
implementation that causes some problems.
|
|
|
|
Everybody who wants to run Linux under VM != VM4.2 should select
|
|
|
|
this option.
|
|
|
|
|
|
|
|
config SHARED_KERNEL
|
|
|
|
bool "VM shared kernel support"
|
|
|
|
help
|
|
|
|
Select this option, if you want to share the text segment of the
|
|
|
|
Linux kernel between different VM guests. This reduces memory
|
|
|
|
usage with lots of guests but greatly increases kernel size.
|
|
|
|
You should only select this option if you know what you are
|
|
|
|
doing and want to exploit this feature.
|
|
|
|
|
|
|
|
config CMM
|
|
|
|
tristate "Cooperative memory management"
|
|
|
|
help
|
|
|
|
Select this option, if you want to enable the kernel interface
|
|
|
|
to reduce the memory size of the system. This is accomplished
|
|
|
|
by allocating pages of memory and put them "on hold". This only
|
|
|
|
makes sense for a system running under VM where the unused pages
|
|
|
|
will be reused by VM for other guest systems. The interface
|
|
|
|
allows an external monitor to balance memory of many systems.
|
|
|
|
Everybody who wants to run Linux under VM should select this
|
|
|
|
option.
|
|
|
|
|
|
|
|
config CMM_PROC
|
|
|
|
bool "/proc interface to cooperative memory management"
|
|
|
|
depends on CMM
|
|
|
|
help
|
|
|
|
Select this option to enable the /proc interface to the
|
|
|
|
cooperative memory management.
|
|
|
|
|
|
|
|
config CMM_IUCV
|
|
|
|
bool "IUCV special message interface to cooperative memory management"
|
|
|
|
depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
|
|
|
|
help
|
|
|
|
Select this option to enable the special message interface to
|
|
|
|
the cooperative memory management.
|
|
|
|
|
|
|
|
config VIRT_TIMER
|
|
|
|
bool "Virtual CPU timer support"
|
|
|
|
help
|
|
|
|
This provides a kernel interface for virtual CPU timers.
|
|
|
|
Default is disabled.
|
|
|
|
|
|
|
|
config VIRT_CPU_ACCOUNTING
|
|
|
|
bool "Base user process accounting on virtual cpu timer"
|
|
|
|
depends on VIRT_TIMER
|
|
|
|
help
|
|
|
|
Select this option to use CPU timer deltas to do user
|
|
|
|
process accounting.
|
|
|
|
|
|
|
|
config APPLDATA_BASE
|
|
|
|
bool "Linux - VM Monitor Stream, base infrastructure"
|
|
|
|
depends on PROC_FS && VIRT_TIMER=y
|
|
|
|
help
|
|
|
|
This provides a kernel interface for creating and updating z/VM APPLDATA
|
|
|
|
monitor records. The monitor records are updated at certain time
|
|
|
|
intervals, once the timer is started.
|
|
|
|
Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
|
|
|
|
i.e. enables or disables monitoring on the Linux side.
|
|
|
|
A custom interval value (in seconds) can be written to
|
|
|
|
/proc/appldata/interval.
|
|
|
|
|
|
|
|
Defaults are 60 seconds interval and timer off.
|
|
|
|
The /proc entries can also be read from, showing the current settings.
|
|
|
|
|
|
|
|
config APPLDATA_MEM
|
|
|
|
tristate "Monitor memory management statistics"
|
|
|
|
depends on APPLDATA_BASE
|
|
|
|
help
|
|
|
|
This provides memory management related data to the Linux - VM Monitor
|
|
|
|
Stream, like paging/swapping rate, memory utilisation, etc.
|
|
|
|
Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
The /proc entry can also be read from, showing the current settings.
|
|
|
|
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
appldata_mem.o.
|
|
|
|
|
|
|
|
config APPLDATA_OS
|
|
|
|
tristate "Monitor OS statistics"
|
|
|
|
depends on APPLDATA_BASE
|
|
|
|
help
|
|
|
|
This provides OS related data to the Linux - VM Monitor Stream, like
|
|
|
|
CPU utilisation, etc.
|
|
|
|
Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
appldata_os.o.
|
|
|
|
|
|
|
|
config APPLDATA_NET_SUM
|
|
|
|
tristate "Monitor overall network statistics"
|
|
|
|
depends on APPLDATA_BASE
|
|
|
|
help
|
|
|
|
This provides network related data to the Linux - VM Monitor Stream,
|
|
|
|
currently there is only a total sum of network I/O statistics, no
|
|
|
|
per-interface data.
|
|
|
|
Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
appldata_net_sum.o.
|
|
|
|
|
|
|
|
config NO_IDLE_HZ
|
|
|
|
bool "No HZ timer ticks in idle"
|
|
|
|
help
|
|
|
|
Switches the regular HZ timer off when the system is going idle.
|
|
|
|
This helps z/VM to detect that the Linux system is idle. VM can
|
|
|
|
then "swap-out" this guest which reduces memory usage. It also
|
|
|
|
reduces the overhead of idle systems.
|
|
|
|
|
|
|
|
The HZ timer can be switched on/off via /proc/sys/kernel/hz_timer.
|
|
|
|
hz_timer=0 means HZ timer is disabled. hz_timer=1 means HZ
|
|
|
|
timer is active.
|
|
|
|
|
|
|
|
config NO_IDLE_HZ_INIT
|
|
|
|
bool "HZ timer in idle off by default"
|
|
|
|
depends on NO_IDLE_HZ
|
|
|
|
help
|
|
|
|
The HZ timer is switched off in idle by default. That means the
|
|
|
|
HZ timer is already disabled at boot time.
|
|
|
|
|
2005-06-26 05:58:11 +08:00
|
|
|
config KEXEC
|
|
|
|
bool "kexec system call (EXPERIMENTAL)"
|
|
|
|
depends on EXPERIMENTAL
|
|
|
|
help
|
|
|
|
kexec is a system call that implements the ability to shutdown your
|
|
|
|
current kernel, and to start another kernel. It is like a reboot
|
|
|
|
but is independent of hardware/microcode support.
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
endmenu
|
|
|
|
|
2005-07-12 12:03:49 +08:00
|
|
|
source "net/Kconfig"
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
config PCMCIA
|
|
|
|
bool
|
|
|
|
default n
|
|
|
|
|
|
|
|
source "drivers/base/Kconfig"
|
|
|
|
|
|
|
|
source "drivers/scsi/Kconfig"
|
|
|
|
|
|
|
|
source "drivers/s390/Kconfig"
|
|
|
|
|
2005-07-12 12:03:49 +08:00
|
|
|
source "drivers/net/Kconfig"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
source "fs/Kconfig"
|
|
|
|
|
|
|
|
source "arch/s390/oprofile/Kconfig"
|
|
|
|
|
|
|
|
source "arch/s390/Kconfig.debug"
|
|
|
|
|
|
|
|
source "security/Kconfig"
|
|
|
|
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
|
|
|
|
source "lib/Kconfig"
|