dc52ddc0e6
This patch implements a new freezer subsystem in the control groups framework. It provides a way to stop and resume execution of all tasks in a cgroup by writing in the cgroup filesystem. The freezer subsystem in the container filesystem defines a file named freezer.state. Writing "FROZEN" to the state file will freeze all tasks in the cgroup. Subsequently writing "RUNNING" will unfreeze the tasks in the cgroup. Reading will return the current state. * Examples of usage : # mkdir /containers/freezer # mount -t cgroup -ofreezer freezer /containers # mkdir /containers/0 # echo $some_pid > /containers/0/tasks to get status of the freezer subsystem : # cat /containers/0/freezer.state RUNNING to freeze all tasks in the container : # echo FROZEN > /containers/0/freezer.state # cat /containers/0/freezer.state FREEZING # cat /containers/0/freezer.state FROZEN to unfreeze all tasks in the container : # echo RUNNING > /containers/0/freezer.state # cat /containers/0/freezer.state RUNNING This is the basic mechanism which should do the right thing for user space task in a simple scenario. It's important to note that freezing can be incomplete. In that case we return EBUSY. This means that some tasks in the cgroup are busy doing something that prevents us from completely freezing the cgroup at this time. After EBUSY, the cgroup will remain partially frozen -- reflected by freezer.state reporting "FREEZING" when read. The state will remain "FREEZING" until one of these things happens: 1) Userspace cancels the freezing operation by writing "RUNNING" to the freezer.state file 2) Userspace retries the freezing operation by writing "FROZEN" to the freezer.state file (writing "FREEZING" is not legal and returns EIO) 3) The tasks that blocked the cgroup from entering the "FROZEN" state disappear from the cgroup's set of tasks. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: export thaw_process] Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Matt Helsley <matthltc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1289 lines
31 KiB
Text
1289 lines
31 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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mainmenu "Linux Kernel Configuration"
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config ARM
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bool
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default y
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select HAVE_AOUT
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select HAVE_IDE
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select RTC_LIB
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select SYS_SUPPORTS_APM_EMULATION
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select HAVE_OPROFILE
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select HAVE_ARCH_KGDB
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select HAVE_KPROBES if (!XIP_KERNEL)
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select HAVE_KRETPROBES if (HAVE_KPROBES)
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select HAVE_FTRACE if (!XIP_KERNEL)
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select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
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select HAVE_GENERIC_DMA_COHERENT
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help
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The ARM series is a line of low-power-consumption RISC chip designs
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licensed by ARM Ltd and targeted at embedded applications and
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handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
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manufactured, but legacy ARM-based PC hardware remains popular in
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Europe. There is an ARM Linux project with a web page at
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<http://www.arm.linux.org.uk/>.
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config HAVE_PWM
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bool
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config SYS_SUPPORTS_APM_EMULATION
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bool
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config GENERIC_GPIO
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bool
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default n
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config GENERIC_TIME
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bool
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default n
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config GENERIC_CLOCKEVENTS
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bool
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default n
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config GENERIC_CLOCKEVENTS_BROADCAST
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bool
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depends on GENERIC_CLOCKEVENTS
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default y if SMP && !LOCAL_TIMERS
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config MMU
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bool
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default y
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config NO_IOPORT
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bool
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default n
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config EISA
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bool
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---help---
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The Extended Industry Standard Architecture (EISA) bus was
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developed as an open alternative to the IBM MicroChannel bus.
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The EISA bus provided some of the features of the IBM MicroChannel
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bus while maintaining backward compatibility with cards made for
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the older ISA bus. The EISA bus saw limited use between 1988 and
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1995 when it was made obsolete by the PCI bus.
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Say Y here if you are building a kernel for an EISA-based machine.
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Otherwise, say N.
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config SBUS
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bool
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config MCA
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bool
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help
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MicroChannel Architecture is found in some IBM PS/2 machines and
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laptops. It is a bus system similar to PCI or ISA. See
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<file:Documentation/mca.txt> (and especially the web page given
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there) before attempting to build an MCA bus kernel.
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config GENERIC_HARDIRQS
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bool
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default y
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config STACKTRACE_SUPPORT
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bool
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default y
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config HAVE_LATENCYTOP_SUPPORT
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bool
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depends on !SMP
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default y
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config LOCKDEP_SUPPORT
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bool
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default y
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config TRACE_IRQFLAGS_SUPPORT
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bool
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default y
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config HARDIRQS_SW_RESEND
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bool
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default y
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config GENERIC_IRQ_PROBE
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bool
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default y
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config GENERIC_LOCKBREAK
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bool
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default y
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depends on SMP && PREEMPT
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config ARCH_MAY_HAVE_PC_FDC
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bool
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config ZONE_DMA
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bool
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config GENERIC_ISA_DMA
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bool
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config FIQ
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bool
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config ARCH_MTD_XIP
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bool
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config GENERIC_HARDIRQS_NO__DO_IRQ
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bool
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def_bool y
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if OPROFILE
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config OPROFILE_ARMV6
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def_bool y
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depends on CPU_V6 && !SMP
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select OPROFILE_ARM11_CORE
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config OPROFILE_MPCORE
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def_bool y
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depends on CPU_V6 && SMP
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select OPROFILE_ARM11_CORE
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config OPROFILE_ARM11_CORE
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bool
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config OPROFILE_ARMV7
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def_bool y
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depends on CPU_V7 && !SMP
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bool
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endif
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config VECTORS_BASE
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hex
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default 0xffff0000 if MMU || CPU_HIGH_VECTOR
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default DRAM_BASE if REMAP_VECTORS_TO_RAM
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default 0x00000000
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help
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The base address of exception vectors.
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "System Type"
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choice
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prompt "ARM system type"
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default ARCH_VERSATILE
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config ARCH_AAEC2000
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bool "Agilent AAEC-2000 based"
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select ARM_AMBA
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select HAVE_CLK
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help
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This enables support for systems based on the Agilent AAEC-2000
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config ARCH_INTEGRATOR
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bool "ARM Ltd. Integrator family"
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select ARM_AMBA
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select HAVE_CLK
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select ICST525
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help
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Support for ARM's Integrator platform.
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config ARCH_REALVIEW
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bool "ARM Ltd. RealView family"
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select ARM_AMBA
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select HAVE_CLK
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select ICST307
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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help
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This enables support for ARM Ltd RealView boards.
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config ARCH_VERSATILE
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bool "ARM Ltd. Versatile family"
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select ARM_AMBA
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select ARM_VIC
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select HAVE_CLK
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select ICST307
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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help
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This enables support for ARM Ltd Versatile board.
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config ARCH_AT91
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bool "Atmel AT91"
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select GENERIC_GPIO
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select HAVE_CLK
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help
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This enables support for systems based on the Atmel AT91RM9200,
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AT91SAM9 and AT91CAP9 processors.
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config ARCH_CLPS7500
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bool "Cirrus CL-PS7500FE"
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select TIMER_ACORN
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select ISA
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select NO_IOPORT
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select ARCH_SPARSEMEM_ENABLE
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help
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Support for the Cirrus Logic PS7500FE system-on-a-chip.
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config ARCH_CLPS711X
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bool "Cirrus Logic CLPS711x/EP721x-based"
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help
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Support for Cirrus Logic 711x/721x based boards.
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config ARCH_EBSA110
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bool "EBSA-110"
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select ISA
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select NO_IOPORT
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help
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This is an evaluation board for the StrongARM processor available
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from Digital. It has limited hardware on-board, including an
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Ethernet interface, two PCMCIA sockets, two serial ports and a
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parallel port.
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config ARCH_EP93XX
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bool "EP93xx-based"
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select ARM_AMBA
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select ARM_VIC
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select GENERIC_GPIO
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select HAVE_CLK
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select ARCH_REQUIRE_GPIOLIB
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help
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This enables support for the Cirrus EP93xx series of CPUs.
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config ARCH_FOOTBRIDGE
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bool "FootBridge"
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select FOOTBRIDGE
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help
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Support for systems based on the DC21285 companion chip
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("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
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config ARCH_NETX
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bool "Hilscher NetX based"
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select ARM_VIC
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help
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This enables support for systems based on the Hilscher NetX Soc
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config ARCH_H720X
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bool "Hynix HMS720x-based"
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select ISA_DMA_API
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help
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This enables support for systems based on the Hynix HMS720x
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config ARCH_IMX
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bool "IMX"
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select GENERIC_GPIO
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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help
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Support for Motorola's i.MX family of processors (MX1, MXL).
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config ARCH_IOP13XX
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bool "IOP13xx-based"
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depends on MMU
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select PLAT_IOP
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select PCI
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select ARCH_SUPPORTS_MSI
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select VMSPLIT_1G
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help
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Support for Intel's IOP13XX (XScale) family of processors.
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|
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config ARCH_IOP32X
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bool "IOP32x-based"
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depends on MMU
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select PLAT_IOP
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select PCI
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select GENERIC_GPIO
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select ARCH_REQUIRE_GPIOLIB
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help
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Support for Intel's 80219 and IOP32X (XScale) family of
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processors.
|
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config ARCH_IOP33X
|
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bool "IOP33x-based"
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depends on MMU
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select PLAT_IOP
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select PCI
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select GENERIC_GPIO
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select ARCH_REQUIRE_GPIOLIB
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help
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Support for Intel's IOP33X (XScale) family of processors.
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|
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config ARCH_IXP23XX
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bool "IXP23XX-based"
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depends on MMU
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select PCI
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help
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Support for Intel's IXP23xx (XScale) family of processors.
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|
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config ARCH_IXP2000
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bool "IXP2400/2800-based"
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depends on MMU
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select PCI
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help
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Support for Intel's IXP2400/2800 (XScale) family of processors.
|
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config ARCH_IXP4XX
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bool "IXP4xx-based"
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depends on MMU
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select GENERIC_GPIO
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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select ZONE_DMA if PCI
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help
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Support for Intel's IXP4XX (XScale) family of processors.
|
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|
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config ARCH_L7200
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bool "LinkUp-L7200"
|
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select FIQ
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help
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Say Y here if you intend to run this kernel on a LinkUp Systems
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L7200 Software Development Board which uses an ARM720T processor.
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Information on this board can be obtained at:
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<http://www.linkupsys.com/>
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If you have any questions or comments about the Linux kernel port
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to this board, send e-mail to <sjhill@cotw.com>.
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config ARCH_KIRKWOOD
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bool "Marvell Kirkwood"
|
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select PCI
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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select PLAT_ORION
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help
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Support for the following Marvell Kirkwood series SoCs:
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88F6180, 88F6192 and 88F6281.
|
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|
|
config ARCH_KS8695
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bool "Micrel/Kendin KS8695"
|
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select GENERIC_GPIO
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help
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|
Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
|
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System-on-Chip devices.
|
|
|
|
config ARCH_NS9XXX
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bool "NetSilicon NS9xxx"
|
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select GENERIC_GPIO
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
|
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select HAVE_CLK
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help
|
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Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
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System.
|
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<http://www.digi.com/products/microprocessors/index.jsp>
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config ARCH_LOKI
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bool "Marvell Loki (88RC8480)"
|
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
|
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select PLAT_ORION
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help
|
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Support for the Marvell Loki (88RC8480) SoC.
|
|
|
|
config ARCH_MV78XX0
|
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bool "Marvell MV78xx0"
|
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select PCI
|
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select GENERIC_TIME
|
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select GENERIC_CLOCKEVENTS
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select PLAT_ORION
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help
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Support for the following Marvell MV78xx0 series SoCs:
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MV781x0, MV782x0.
|
|
|
|
config ARCH_MXC
|
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bool "Freescale MXC/iMX-based"
|
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select GENERIC_TIME
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select GENERIC_CLOCKEVENTS
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select ARCH_MTD_XIP
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select GENERIC_GPIO
|
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select ARCH_REQUIRE_GPIOLIB
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help
|
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Support for Freescale MXC/iMX-based family of processors
|
|
|
|
config ARCH_ORION5X
|
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bool "Marvell Orion"
|
|
depends on MMU
|
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select PCI
|
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select GENERIC_GPIO
|
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select GENERIC_TIME
|
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select GENERIC_CLOCKEVENTS
|
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select PLAT_ORION
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help
|
|
Support for the following Marvell Orion 5x series SoCs:
|
|
Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
|
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Orion-2 (5281), Orion-1-90 (6183).
|
|
|
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config ARCH_PNX4008
|
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bool "Philips Nexperia PNX4008 Mobile"
|
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select HAVE_CLK
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help
|
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This enables support for Philips PNX4008 mobile platform.
|
|
|
|
config ARCH_PXA
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bool "PXA2xx/PXA3xx-based"
|
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depends on MMU
|
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select ARCH_MTD_XIP
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select GENERIC_GPIO
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select HAVE_CLK
|
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select ARCH_REQUIRE_GPIOLIB
|
|
select GENERIC_TIME
|
|
select GENERIC_CLOCKEVENTS
|
|
select TICK_ONESHOT
|
|
help
|
|
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
|
|
|
|
config ARCH_RPC
|
|
bool "RiscPC"
|
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select ARCH_ACORN
|
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select FIQ
|
|
select TIMER_ACORN
|
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select ARCH_MAY_HAVE_PC_FDC
|
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select HAVE_PATA_PLATFORM
|
|
select ISA_DMA_API
|
|
select NO_IOPORT
|
|
select ARCH_SPARSEMEM_ENABLE
|
|
help
|
|
On the Acorn Risc-PC, Linux can support the internal IDE disk and
|
|
CD-ROM interface, serial and parallel port, and the floppy drive.
|
|
|
|
config ARCH_SA1100
|
|
bool "SA1100-based"
|
|
select ISA
|
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select ARCH_SPARSEMEM_ENABLE
|
|
select ARCH_MTD_XIP
|
|
select GENERIC_GPIO
|
|
select GENERIC_TIME
|
|
select GENERIC_CLOCKEVENTS
|
|
select HAVE_CLK
|
|
select TICK_ONESHOT
|
|
select ARCH_REQUIRE_GPIOLIB
|
|
help
|
|
Support for StrongARM 11x0 based boards.
|
|
|
|
config ARCH_S3C2410
|
|
bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
|
|
select GENERIC_GPIO
|
|
select HAVE_CLK
|
|
help
|
|
Samsung S3C2410X CPU based systems, such as the Simtec Electronics
|
|
BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
|
|
the Samsung SMDK2410 development board (and derivatives).
|
|
|
|
config ARCH_SHARK
|
|
bool "Shark"
|
|
select ISA
|
|
select ISA_DMA
|
|
select ZONE_DMA
|
|
select PCI
|
|
help
|
|
Support for the StrongARM based Digital DNARD machine, also known
|
|
as "Shark" (<http://www.shark-linux.de/shark.html>).
|
|
|
|
config ARCH_LH7A40X
|
|
bool "Sharp LH7A40X"
|
|
select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
|
|
select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
|
|
help
|
|
Say Y here for systems based on one of the Sharp LH7A40X
|
|
System on a Chip processors. These CPUs include an ARM922T
|
|
core with a wide array of integrated devices for
|
|
hand-held and low-power applications.
|
|
|
|
config ARCH_DAVINCI
|
|
bool "TI DaVinci"
|
|
select GENERIC_TIME
|
|
select GENERIC_CLOCKEVENTS
|
|
select GENERIC_GPIO
|
|
select ARCH_REQUIRE_GPIOLIB
|
|
select HAVE_CLK
|
|
select ZONE_DMA
|
|
help
|
|
Support for TI's DaVinci platform.
|
|
|
|
config ARCH_OMAP
|
|
bool "TI OMAP"
|
|
select GENERIC_GPIO
|
|
select HAVE_CLK
|
|
select ARCH_REQUIRE_GPIOLIB
|
|
select GENERIC_TIME
|
|
select GENERIC_CLOCKEVENTS
|
|
help
|
|
Support for TI's OMAP platform (OMAP1 and OMAP2).
|
|
|
|
config ARCH_MSM7X00A
|
|
bool "Qualcomm MSM7X00A"
|
|
select GENERIC_TIME
|
|
select GENERIC_CLOCKEVENTS
|
|
help
|
|
Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
|
|
apps processor of the MSM7X00A and depends on a shared memory
|
|
interface to the ARM9 modem processor which runs the baseband stack
|
|
and controls some vital subsystems (clock and power control, etc).
|
|
<http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
|
|
|
|
endchoice
|
|
|
|
source "arch/arm/mach-clps711x/Kconfig"
|
|
|
|
source "arch/arm/mach-ep93xx/Kconfig"
|
|
|
|
source "arch/arm/mach-footbridge/Kconfig"
|
|
|
|
source "arch/arm/mach-integrator/Kconfig"
|
|
|
|
source "arch/arm/mach-iop32x/Kconfig"
|
|
|
|
source "arch/arm/mach-iop33x/Kconfig"
|
|
|
|
source "arch/arm/mach-iop13xx/Kconfig"
|
|
|
|
source "arch/arm/mach-ixp4xx/Kconfig"
|
|
|
|
source "arch/arm/mach-ixp2000/Kconfig"
|
|
|
|
source "arch/arm/mach-ixp23xx/Kconfig"
|
|
|
|
source "arch/arm/mach-loki/Kconfig"
|
|
|
|
source "arch/arm/mach-mv78xx0/Kconfig"
|
|
|
|
source "arch/arm/mach-pxa/Kconfig"
|
|
|
|
source "arch/arm/mach-sa1100/Kconfig"
|
|
|
|
source "arch/arm/plat-omap/Kconfig"
|
|
|
|
source "arch/arm/mach-omap1/Kconfig"
|
|
|
|
source "arch/arm/mach-omap2/Kconfig"
|
|
|
|
source "arch/arm/mach-orion5x/Kconfig"
|
|
|
|
source "arch/arm/mach-kirkwood/Kconfig"
|
|
|
|
source "arch/arm/plat-s3c24xx/Kconfig"
|
|
source "arch/arm/plat-s3c/Kconfig"
|
|
|
|
if ARCH_S3C2410
|
|
source "arch/arm/mach-s3c2400/Kconfig"
|
|
source "arch/arm/mach-s3c2410/Kconfig"
|
|
source "arch/arm/mach-s3c2412/Kconfig"
|
|
source "arch/arm/mach-s3c2440/Kconfig"
|
|
source "arch/arm/mach-s3c2442/Kconfig"
|
|
source "arch/arm/mach-s3c2443/Kconfig"
|
|
endif
|
|
|
|
source "arch/arm/mach-lh7a40x/Kconfig"
|
|
|
|
source "arch/arm/mach-imx/Kconfig"
|
|
|
|
source "arch/arm/mach-h720x/Kconfig"
|
|
|
|
source "arch/arm/mach-versatile/Kconfig"
|
|
|
|
source "arch/arm/mach-aaec2000/Kconfig"
|
|
|
|
source "arch/arm/mach-realview/Kconfig"
|
|
|
|
source "arch/arm/mach-at91/Kconfig"
|
|
|
|
source "arch/arm/plat-mxc/Kconfig"
|
|
|
|
source "arch/arm/mach-netx/Kconfig"
|
|
|
|
source "arch/arm/mach-ns9xxx/Kconfig"
|
|
|
|
source "arch/arm/mach-davinci/Kconfig"
|
|
|
|
source "arch/arm/mach-ks8695/Kconfig"
|
|
|
|
source "arch/arm/mach-msm/Kconfig"
|
|
|
|
# Definitions to make life easier
|
|
config ARCH_ACORN
|
|
bool
|
|
|
|
config PLAT_IOP
|
|
bool
|
|
|
|
config PLAT_ORION
|
|
bool
|
|
|
|
source arch/arm/mm/Kconfig
|
|
|
|
config IWMMXT
|
|
bool "Enable iWMMXt support"
|
|
depends on CPU_XSCALE || CPU_XSC3
|
|
default y if PXA27x || PXA3xx
|
|
help
|
|
Enable support for iWMMXt context switching at run time if
|
|
running on a CPU that supports it.
|
|
|
|
# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
|
|
config XSCALE_PMU
|
|
bool
|
|
depends on CPU_XSCALE && !XSCALE_PMU_TIMER
|
|
default y
|
|
|
|
if !MMU
|
|
source "arch/arm/Kconfig-nommu"
|
|
endif
|
|
|
|
endmenu
|
|
|
|
source "arch/arm/common/Kconfig"
|
|
|
|
config FORCE_MAX_ZONEORDER
|
|
int
|
|
depends on SA1111
|
|
default "9"
|
|
|
|
menu "Bus support"
|
|
|
|
config ARM_AMBA
|
|
bool
|
|
|
|
config ISA
|
|
bool
|
|
help
|
|
Find out whether you have ISA slots on your motherboard. ISA is the
|
|
name of a bus system, i.e. the way the CPU talks to the other stuff
|
|
inside your box. Other bus systems are PCI, EISA, MicroChannel
|
|
(MCA) or VESA. ISA is an older system, now being displaced by PCI;
|
|
newer boards don't support it. If you have ISA, say Y, otherwise N.
|
|
|
|
# Select ISA DMA controller support
|
|
config ISA_DMA
|
|
bool
|
|
select ISA_DMA_API
|
|
|
|
# Select ISA DMA interface
|
|
config ISA_DMA_API
|
|
bool
|
|
|
|
config PCI
|
|
bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
|
|
help
|
|
Find out whether you have a PCI motherboard. PCI is the name of a
|
|
bus system, i.e. the way the CPU talks to the other stuff inside
|
|
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
|
|
VESA. If you have PCI, say Y, otherwise N.
|
|
|
|
config PCI_SYSCALL
|
|
def_bool PCI
|
|
|
|
# Select the host bridge type
|
|
config PCI_HOST_VIA82C505
|
|
bool
|
|
depends on PCI && ARCH_SHARK
|
|
default y
|
|
|
|
config PCI_HOST_ITE8152
|
|
bool
|
|
depends on PCI && MACH_ARMCORE
|
|
default y
|
|
select DMABOUNCE
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Kernel Features"
|
|
|
|
source "kernel/time/Kconfig"
|
|
|
|
config SMP
|
|
bool "Symmetric Multi-Processing (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
|
|
select USE_GENERIC_SMP_HELPERS
|
|
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, single
|
|
processor machines. On a single processor machine, the kernel will
|
|
run faster if you say N here.
|
|
|
|
See also <file:Documentation/i386/IO-APIC.txt>,
|
|
<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
|
|
<http://www.linuxdoc.org/docs.html#howto>.
|
|
|
|
If you don't know what to do here, say N.
|
|
|
|
choice
|
|
prompt "Memory split"
|
|
default VMSPLIT_3G
|
|
help
|
|
Select the desired split between kernel and user memory.
|
|
|
|
If you are not absolutely sure what you are doing, leave this
|
|
option alone!
|
|
|
|
config VMSPLIT_3G
|
|
bool "3G/1G user/kernel split"
|
|
config VMSPLIT_2G
|
|
bool "2G/2G user/kernel split"
|
|
config VMSPLIT_1G
|
|
bool "1G/3G user/kernel split"
|
|
endchoice
|
|
|
|
config PAGE_OFFSET
|
|
hex
|
|
default 0x40000000 if VMSPLIT_1G
|
|
default 0x80000000 if VMSPLIT_2G
|
|
default 0xC0000000
|
|
|
|
config NR_CPUS
|
|
int "Maximum number of CPUs (2-32)"
|
|
range 2 32
|
|
depends on SMP
|
|
default "4"
|
|
|
|
config HOTPLUG_CPU
|
|
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
|
|
depends on SMP && HOTPLUG && EXPERIMENTAL
|
|
help
|
|
Say Y here to experiment with turning CPUs off and on. CPUs
|
|
can be controlled through /sys/devices/system/cpu.
|
|
|
|
config LOCAL_TIMERS
|
|
bool "Use local timer interrupts"
|
|
depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
|
|
default y
|
|
help
|
|
Enable support for local timers on SMP platforms, rather then the
|
|
legacy IPI broadcast method. Local timers allows the system
|
|
accounting to be spread across the timer interval, preventing a
|
|
"thundering herd" at every timer tick.
|
|
|
|
config PREEMPT
|
|
bool "Preemptible Kernel (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
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 HZ
|
|
int
|
|
default 128 if ARCH_L7200
|
|
default 200 if ARCH_EBSA110 || ARCH_S3C2410
|
|
default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
|
|
default AT91_TIMER_HZ if ARCH_AT91
|
|
default 100
|
|
|
|
config AEABI
|
|
bool "Use the ARM EABI to compile the kernel"
|
|
help
|
|
This option allows for the kernel to be compiled using the latest
|
|
ARM ABI (aka EABI). This is only useful if you are using a user
|
|
space environment that is also compiled with EABI.
|
|
|
|
Since there are major incompatibilities between the legacy ABI and
|
|
EABI, especially with regard to structure member alignment, this
|
|
option also changes the kernel syscall calling convention to
|
|
disambiguate both ABIs and allow for backward compatibility support
|
|
(selected with CONFIG_OABI_COMPAT).
|
|
|
|
To use this you need GCC version 4.0.0 or later.
|
|
|
|
config OABI_COMPAT
|
|
bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
|
|
depends on AEABI && EXPERIMENTAL
|
|
default y
|
|
help
|
|
This option preserves the old syscall interface along with the
|
|
new (ARM EABI) one. It also provides a compatibility layer to
|
|
intercept syscalls that have structure arguments which layout
|
|
in memory differs between the legacy ABI and the new ARM EABI
|
|
(only for non "thumb" binaries). This option adds a tiny
|
|
overhead to all syscalls and produces a slightly larger kernel.
|
|
If you know you'll be using only pure EABI user space then you
|
|
can say N here. If this option is not selected and you attempt
|
|
to execute a legacy ABI binary then the result will be
|
|
UNPREDICTABLE (in fact it can be predicted that it won't work
|
|
at all). If in doubt say Y.
|
|
|
|
config ARCH_FLATMEM_HAS_HOLES
|
|
bool
|
|
default y
|
|
depends on FLATMEM
|
|
|
|
# Discontigmem is deprecated
|
|
config ARCH_DISCONTIGMEM_ENABLE
|
|
bool
|
|
|
|
config ARCH_SPARSEMEM_ENABLE
|
|
bool
|
|
|
|
config ARCH_SPARSEMEM_DEFAULT
|
|
def_bool ARCH_SPARSEMEM_ENABLE
|
|
|
|
config ARCH_SELECT_MEMORY_MODEL
|
|
def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
|
|
|
|
config NODES_SHIFT
|
|
int
|
|
default "4" if ARCH_LH7A40X
|
|
default "2"
|
|
depends on NEED_MULTIPLE_NODES
|
|
|
|
source "mm/Kconfig"
|
|
|
|
config LEDS
|
|
bool "Timer and CPU usage LEDs"
|
|
depends on ARCH_CDB89712 || ARCH_EBSA110 || \
|
|
ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
|
|
ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
|
|
ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
|
|
ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
|
|
ARCH_AT91 || ARCH_DAVINCI || \
|
|
ARCH_KS8695 || MACH_RD88F5182
|
|
help
|
|
If you say Y here, the LEDs on your machine will be used
|
|
to provide useful information about your current system status.
|
|
|
|
If you are compiling a kernel for a NetWinder or EBSA-285, you will
|
|
be able to select which LEDs are active using the options below. If
|
|
you are compiling a kernel for the EBSA-110 or the LART however, the
|
|
red LED will simply flash regularly to indicate that the system is
|
|
still functional. It is safe to say Y here if you have a CATS
|
|
system, but the driver will do nothing.
|
|
|
|
config LEDS_TIMER
|
|
bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
|
|
OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
|
|
|| MACH_OMAP_PERSEUS2
|
|
depends on LEDS
|
|
depends on !GENERIC_CLOCKEVENTS
|
|
default y if ARCH_EBSA110
|
|
help
|
|
If you say Y here, one of the system LEDs (the green one on the
|
|
NetWinder, the amber one on the EBSA285, or the red one on the LART)
|
|
will flash regularly to indicate that the system is still
|
|
operational. This is mainly useful to kernel hackers who are
|
|
debugging unstable kernels.
|
|
|
|
The LART uses the same LED for both Timer LED and CPU usage LED
|
|
functions. You may choose to use both, but the Timer LED function
|
|
will overrule the CPU usage LED.
|
|
|
|
config LEDS_CPU
|
|
bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
|
|
!ARCH_OMAP) \
|
|
|| OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
|
|
|| MACH_OMAP_PERSEUS2
|
|
depends on LEDS
|
|
help
|
|
If you say Y here, the red LED will be used to give a good real
|
|
time indication of CPU usage, by lighting whenever the idle task
|
|
is not currently executing.
|
|
|
|
The LART uses the same LED for both Timer LED and CPU usage LED
|
|
functions. You may choose to use both, but the Timer LED function
|
|
will overrule the CPU usage LED.
|
|
|
|
config ALIGNMENT_TRAP
|
|
bool
|
|
depends on CPU_CP15_MMU
|
|
default y if !ARCH_EBSA110
|
|
help
|
|
ARM processors cannot fetch/store information which is not
|
|
naturally aligned on the bus, i.e., a 4 byte fetch must start at an
|
|
address divisible by 4. On 32-bit ARM processors, these non-aligned
|
|
fetch/store instructions will be emulated in software if you say
|
|
here, which has a severe performance impact. This is necessary for
|
|
correct operation of some network protocols. With an IP-only
|
|
configuration it is safe to say N, otherwise say Y.
|
|
|
|
endmenu
|
|
|
|
menu "Boot options"
|
|
|
|
# Compressed boot loader in ROM. Yes, we really want to ask about
|
|
# TEXT and BSS so we preserve their values in the config files.
|
|
config ZBOOT_ROM_TEXT
|
|
hex "Compressed ROM boot loader base address"
|
|
default "0"
|
|
help
|
|
The physical address at which the ROM-able zImage is to be
|
|
placed in the target. Platforms which normally make use of
|
|
ROM-able zImage formats normally set this to a suitable
|
|
value in their defconfig file.
|
|
|
|
If ZBOOT_ROM is not enabled, this has no effect.
|
|
|
|
config ZBOOT_ROM_BSS
|
|
hex "Compressed ROM boot loader BSS address"
|
|
default "0"
|
|
help
|
|
The base address of an area of read/write memory in the target
|
|
for the ROM-able zImage which must be available while the
|
|
decompressor is running. It must be large enough to hold the
|
|
entire decompressed kernel plus an additional 128 KiB.
|
|
Platforms which normally make use of ROM-able zImage formats
|
|
normally set this to a suitable value in their defconfig file.
|
|
|
|
If ZBOOT_ROM is not enabled, this has no effect.
|
|
|
|
config ZBOOT_ROM
|
|
bool "Compressed boot loader in ROM/flash"
|
|
depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
|
|
help
|
|
Say Y here if you intend to execute your compressed kernel image
|
|
(zImage) directly from ROM or flash. If unsure, say N.
|
|
|
|
config CMDLINE
|
|
string "Default kernel command string"
|
|
default ""
|
|
help
|
|
On some architectures (EBSA110 and CATS), there is currently no way
|
|
for the boot loader to pass arguments to the kernel. For these
|
|
architectures, you should supply some command-line options at build
|
|
time by entering them here. As a minimum, you should specify the
|
|
memory size and the root device (e.g., mem=64M root=/dev/nfs).
|
|
|
|
config XIP_KERNEL
|
|
bool "Kernel Execute-In-Place from ROM"
|
|
depends on !ZBOOT_ROM
|
|
help
|
|
Execute-In-Place allows the kernel to run from non-volatile storage
|
|
directly addressable by the CPU, such as NOR flash. This saves RAM
|
|
space since the text section of the kernel is not loaded from flash
|
|
to RAM. Read-write sections, such as the data section and stack,
|
|
are still copied to RAM. The XIP kernel is not compressed since
|
|
it has to run directly from flash, so it will take more space to
|
|
store it. The flash address used to link the kernel object files,
|
|
and for storing it, is configuration dependent. Therefore, if you
|
|
say Y here, you must know the proper physical address where to
|
|
store the kernel image depending on your own flash memory usage.
|
|
|
|
Also note that the make target becomes "make xipImage" rather than
|
|
"make zImage" or "make Image". The final kernel binary to put in
|
|
ROM memory will be arch/arm/boot/xipImage.
|
|
|
|
If unsure, say N.
|
|
|
|
config XIP_PHYS_ADDR
|
|
hex "XIP Kernel Physical Location"
|
|
depends on XIP_KERNEL
|
|
default "0x00080000"
|
|
help
|
|
This is the physical address in your flash memory the kernel will
|
|
be linked for and stored to. This address is dependent on your
|
|
own flash usage.
|
|
|
|
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 it is independent of the system firmware. And like a reboot
|
|
you can start any kernel with it, not just Linux.
|
|
|
|
It is an ongoing process to be certain the hardware in a machine
|
|
is properly shutdown, so do not be surprised if this code does not
|
|
initially work for you. It may help to enable device hotplugging
|
|
support.
|
|
|
|
config ATAGS_PROC
|
|
bool "Export atags in procfs"
|
|
depends on KEXEC
|
|
default y
|
|
help
|
|
Should the atags used to boot the kernel be exported in an "atags"
|
|
file in procfs. Useful with kexec.
|
|
|
|
endmenu
|
|
|
|
menu "CPU Power Management"
|
|
|
|
if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
|
|
|
|
source "drivers/cpufreq/Kconfig"
|
|
|
|
config CPU_FREQ_SA1100
|
|
bool
|
|
depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
|
|
default y
|
|
|
|
config CPU_FREQ_SA1110
|
|
bool
|
|
depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
|
|
default y
|
|
|
|
config CPU_FREQ_INTEGRATOR
|
|
tristate "CPUfreq driver for ARM Integrator CPUs"
|
|
depends on ARCH_INTEGRATOR && CPU_FREQ
|
|
default y
|
|
help
|
|
This enables the CPUfreq driver for ARM Integrator CPUs.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
If in doubt, say Y.
|
|
|
|
config CPU_FREQ_IMX
|
|
tristate "CPUfreq driver for i.MX CPUs"
|
|
depends on ARCH_IMX && CPU_FREQ
|
|
default n
|
|
help
|
|
This enables the CPUfreq driver for i.MX CPUs.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_PXA
|
|
bool
|
|
depends on CPU_FREQ && ARCH_PXA && PXA25x
|
|
default y
|
|
select CPU_FREQ_DEFAULT_GOV_USERSPACE
|
|
|
|
endif
|
|
|
|
source "drivers/cpuidle/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Floating point emulation"
|
|
|
|
comment "At least one emulation must be selected"
|
|
|
|
config FPE_NWFPE
|
|
bool "NWFPE math emulation"
|
|
depends on !AEABI || OABI_COMPAT
|
|
---help---
|
|
Say Y to include the NWFPE floating point emulator in the kernel.
|
|
This is necessary to run most binaries. Linux does not currently
|
|
support floating point hardware so you need to say Y here even if
|
|
your machine has an FPA or floating point co-processor podule.
|
|
|
|
You may say N here if you are going to load the Acorn FPEmulator
|
|
early in the bootup.
|
|
|
|
config FPE_NWFPE_XP
|
|
bool "Support extended precision"
|
|
depends on FPE_NWFPE
|
|
help
|
|
Say Y to include 80-bit support in the kernel floating-point
|
|
emulator. Otherwise, only 32 and 64-bit support is compiled in.
|
|
Note that gcc does not generate 80-bit operations by default,
|
|
so in most cases this option only enlarges the size of the
|
|
floating point emulator without any good reason.
|
|
|
|
You almost surely want to say N here.
|
|
|
|
config FPE_FASTFPE
|
|
bool "FastFPE math emulation (EXPERIMENTAL)"
|
|
depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
|
|
---help---
|
|
Say Y here to include the FAST floating point emulator in the kernel.
|
|
This is an experimental much faster emulator which now also has full
|
|
precision for the mantissa. It does not support any exceptions.
|
|
It is very simple, and approximately 3-6 times faster than NWFPE.
|
|
|
|
It should be sufficient for most programs. It may be not suitable
|
|
for scientific calculations, but you have to check this for yourself.
|
|
If you do not feel you need a faster FP emulation you should better
|
|
choose NWFPE.
|
|
|
|
config VFP
|
|
bool "VFP-format floating point maths"
|
|
depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
|
|
help
|
|
Say Y to include VFP support code in the kernel. This is needed
|
|
if your hardware includes a VFP unit.
|
|
|
|
Please see <file:Documentation/arm/VFP/release-notes.txt> for
|
|
release notes and additional status information.
|
|
|
|
Say N if your target does not have VFP hardware.
|
|
|
|
config VFPv3
|
|
bool
|
|
depends on VFP
|
|
default y if CPU_V7
|
|
|
|
config NEON
|
|
bool "Advanced SIMD (NEON) Extension support"
|
|
depends on VFPv3 && CPU_V7
|
|
help
|
|
Say Y to include support code for NEON, the ARMv7 Advanced SIMD
|
|
Extension.
|
|
|
|
endmenu
|
|
|
|
menu "Userspace binary formats"
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
config ARTHUR
|
|
tristate "RISC OS personality"
|
|
depends on !AEABI
|
|
help
|
|
Say Y here to include the kernel code necessary if you want to run
|
|
Acorn RISC OS/Arthur binaries under Linux. This code is still very
|
|
experimental; if this sounds frightening, say N and sleep in peace.
|
|
You can also say M here to compile this support as a module (which
|
|
will be called arthur).
|
|
|
|
endmenu
|
|
|
|
menu "Power management options"
|
|
|
|
source "kernel/power/Kconfig"
|
|
|
|
config ARCH_SUSPEND_POSSIBLE
|
|
def_bool y
|
|
|
|
endmenu
|
|
|
|
source "net/Kconfig"
|
|
|
|
menu "Device Drivers"
|
|
|
|
source "drivers/base/Kconfig"
|
|
|
|
source "drivers/connector/Kconfig"
|
|
|
|
if ALIGNMENT_TRAP || !CPU_CP15_MMU
|
|
source "drivers/mtd/Kconfig"
|
|
endif
|
|
|
|
source "drivers/parport/Kconfig"
|
|
|
|
source "drivers/pnp/Kconfig"
|
|
|
|
source "drivers/block/Kconfig"
|
|
|
|
# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
|
|
|
|
source "drivers/misc/Kconfig"
|
|
|
|
source "drivers/ide/Kconfig"
|
|
|
|
source "drivers/scsi/Kconfig"
|
|
|
|
source "drivers/ata/Kconfig"
|
|
|
|
source "drivers/md/Kconfig"
|
|
|
|
source "drivers/message/fusion/Kconfig"
|
|
|
|
source "drivers/ieee1394/Kconfig"
|
|
|
|
source "drivers/message/i2o/Kconfig"
|
|
|
|
source "drivers/net/Kconfig"
|
|
|
|
source "drivers/isdn/Kconfig"
|
|
|
|
# input before char - char/joystick depends on it. As does USB.
|
|
|
|
source "drivers/input/Kconfig"
|
|
|
|
source "drivers/char/Kconfig"
|
|
|
|
source "drivers/i2c/Kconfig"
|
|
|
|
source "drivers/spi/Kconfig"
|
|
|
|
source "drivers/gpio/Kconfig"
|
|
|
|
source "drivers/w1/Kconfig"
|
|
|
|
source "drivers/power/Kconfig"
|
|
|
|
source "drivers/hwmon/Kconfig"
|
|
|
|
source "drivers/thermal/Kconfig"
|
|
|
|
source "drivers/watchdog/Kconfig"
|
|
|
|
source "drivers/ssb/Kconfig"
|
|
|
|
#source "drivers/l3/Kconfig"
|
|
|
|
source "drivers/mfd/Kconfig"
|
|
|
|
source "drivers/media/Kconfig"
|
|
|
|
source "drivers/video/Kconfig"
|
|
|
|
source "sound/Kconfig"
|
|
|
|
source "drivers/hid/Kconfig"
|
|
|
|
source "drivers/usb/Kconfig"
|
|
|
|
source "drivers/mmc/Kconfig"
|
|
|
|
source "drivers/memstick/Kconfig"
|
|
|
|
source "drivers/accessibility/Kconfig"
|
|
|
|
source "drivers/leds/Kconfig"
|
|
|
|
source "drivers/rtc/Kconfig"
|
|
|
|
source "drivers/dma/Kconfig"
|
|
|
|
source "drivers/dca/Kconfig"
|
|
|
|
source "drivers/auxdisplay/Kconfig"
|
|
|
|
source "drivers/regulator/Kconfig"
|
|
|
|
source "drivers/uio/Kconfig"
|
|
|
|
endmenu
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "arch/arm/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
source "lib/Kconfig"
|