697 lines
17 KiB
Plaintext
697 lines
17 KiB
Plaintext
# 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/PowerPC Kernel Configuration"
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source "arch/powerpc/platforms/Kconfig.cputype"
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config PPC32
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bool
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default y if !PPC64
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config 64BIT
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bool
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default y if PPC64
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config WORD_SIZE
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int
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default 64 if PPC64
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default 32 if !PPC64
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config PPC_MERGE
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def_bool y
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config MMU
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bool
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default y
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config GENERIC_CMOS_UPDATE
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def_bool y
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config GENERIC_TIME
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def_bool y
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config GENERIC_TIME_VSYSCALL
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def_bool y
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config GENERIC_CLOCKEVENTS
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def_bool y
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config GENERIC_HARDIRQS
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bool
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default y
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config IRQ_PER_CPU
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default y
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config ARCH_HAS_ILOG2_U32
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bool
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default y
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config ARCH_HAS_ILOG2_U64
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bool
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default y if 64BIT
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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 GENERIC_FIND_NEXT_BIT
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bool
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default y
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config ARCH_NO_VIRT_TO_BUS
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def_bool PPC64
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config PPC
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bool
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default y
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config EARLY_PRINTK
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bool
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default y
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config COMPAT
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bool
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default y if PPC64
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config SYSVIPC_COMPAT
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bool
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depends on COMPAT && SYSVIPC
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default y
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# All PPC32s use generic nvram driver through ppc_md
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config GENERIC_NVRAM
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bool
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default y if PPC32
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config SCHED_NO_NO_OMIT_FRAME_POINTER
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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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default !PPC_PSERIES || PCI
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config PPC_OF
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def_bool y
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config OF
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def_bool y
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config PPC_UDBG_16550
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bool
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default n
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config GENERIC_TBSYNC
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bool
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default y if PPC32 && SMP
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default n
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config AUDIT_ARCH
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bool
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default y
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config GENERIC_BUG
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bool
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default y
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depends on BUG
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config SYS_SUPPORTS_APM_EMULATION
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default y if PMAC_APM_EMU
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bool
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config DEFAULT_UIMAGE
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bool
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help
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Used to allow a board to specify it wants a uImage built by default
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default n
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config PPC64_SWSUSP
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bool
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depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
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default y
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config PPC_DCR_NATIVE
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bool
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default n
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config PPC_DCR_MMIO
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bool
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default n
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config PPC_DCR
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bool
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depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
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default y
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config PPC_OF_PLATFORM_PCI
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bool
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depends on PPC64 # not supported on 32 bits yet
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default n
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source "init/Kconfig"
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source "arch/powerpc/platforms/Kconfig"
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menu "Kernel options"
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config HIGHMEM
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bool "High memory support"
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depends on PPC32
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source kernel/time/Kconfig
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source kernel/Kconfig.hz
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source kernel/Kconfig.preempt
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source "fs/Kconfig.binfmt"
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# We optimistically allocate largepages from the VM, so make the limit
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# large enough (16MB). This badly named config option is actually
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# max order + 1
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config FORCE_MAX_ZONEORDER
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int
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depends on PPC64
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default "9" if PPC_64K_PAGES
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default "13"
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config HUGETLB_PAGE_SIZE_VARIABLE
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bool
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depends on HUGETLB_PAGE
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default y
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config MATH_EMULATION
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bool "Math emulation"
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depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
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---help---
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Some PowerPC chips designed for embedded applications do not have
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a floating-point unit and therefore do not implement the
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floating-point instructions in the PowerPC instruction set. If you
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say Y here, the kernel will include code to emulate a floating-point
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unit, which will allow programs that use floating-point
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instructions to run.
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config 8XX_MINIMAL_FPEMU
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bool "Minimal math emulation for 8xx"
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depends on 8xx && !MATH_EMULATION
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help
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Older arch/ppc kernels still emulated a few floating point
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instructions such as load and store, even when full math
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emulation is disabled. Say "Y" here if you want to preserve
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this behavior.
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It is recommended that you build a soft-float userspace instead.
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config IOMMU_VMERGE
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bool "Enable IOMMU virtual merging"
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depends on PPC64
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default y
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help
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Cause IO segments sent to a device for DMA to be merged virtually
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by the IOMMU when they happen to have been allocated contiguously.
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This doesn't add pressure to the IOMMU allocator. However, some
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drivers don't support getting large merged segments coming back
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from *_map_sg().
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Most drivers don't have this problem; it is safe to say Y here.
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config HOTPLUG_CPU
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bool "Support for enabling/disabling CPUs"
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depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
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---help---
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Say Y here to be able to disable and re-enable individual
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CPUs at runtime on SMP machines.
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Say N if you are unsure.
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config ARCH_ENABLE_MEMORY_HOTPLUG
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def_bool y
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config KEXEC
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bool "kexec system call (EXPERIMENTAL)"
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depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
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help
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kexec is a system call that implements the ability to shutdown your
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current kernel, and to start another kernel. It is like a reboot
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but it is independent of the system firmware. And like a reboot
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you can start any kernel with it, not just Linux.
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The name comes from the similarity to the exec system call.
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It is an ongoing process to be certain the hardware in a machine
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is properly shutdown, so do not be surprised if this code does not
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initially work for you. It may help to enable device hotplugging
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support. As of this writing the exact hardware interface is
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strongly in flux, so no good recommendation can be made.
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config CRASH_DUMP
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bool "Build a kdump crash kernel (EXPERIMENTAL)"
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depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
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help
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Build a kernel suitable for use as a kdump capture kernel.
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The kernel will be linked at a different address than normal, and
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so can only be used for Kdump.
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Don't change this unless you know what you are doing.
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config PPCBUG_NVRAM
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bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
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default y if PPC_PREP
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config IRQ_ALL_CPUS
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bool "Distribute interrupts on all CPUs by default"
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depends on SMP && !MV64360
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help
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This option gives the kernel permission to distribute IRQs across
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multiple CPUs. Saying N here will route all IRQs to the first
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CPU. Generally saying Y is safe, although some problems have been
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reported with SMP Power Macintoshes with this option enabled.
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config NUMA
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bool "NUMA support"
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depends on PPC64
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default y if SMP && PPC_PSERIES
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config NODES_SHIFT
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int
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default "4"
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depends on NEED_MULTIPLE_NODES
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config ARCH_SELECT_MEMORY_MODEL
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def_bool y
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depends on PPC64
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config ARCH_FLATMEM_ENABLE
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def_bool y
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depends on (PPC64 && !NUMA) || PPC32
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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depends on PPC64
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select SPARSEMEM_VMEMMAP_ENABLE
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config ARCH_SPARSEMEM_DEFAULT
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def_bool y
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depends on (SMP && PPC_PSERIES) || PPC_PS3
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config ARCH_POPULATES_NODE_MAP
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def_bool y
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source "mm/Kconfig"
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config ARCH_MEMORY_PROBE
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def_bool y
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depends on MEMORY_HOTPLUG
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# Some NUMA nodes have memory ranges that span
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# other nodes. Even though a pfn is valid and
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# between a node's start and end pfns, it may not
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# reside on that node. See memmap_init_zone()
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# for details.
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config NODES_SPAN_OTHER_NODES
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def_bool y
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depends on NEED_MULTIPLE_NODES
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config PPC_HAS_HASH_64K
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bool
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depends on PPC64
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default n
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config PPC_64K_PAGES
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bool "64k page size"
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depends on PPC64
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select PPC_HAS_HASH_64K
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help
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This option changes the kernel logical page size to 64k. On machines
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without processor support for 64k pages, the kernel will simulate
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them by loading each individual 4k page on demand transparently,
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while on hardware with such support, it will be used to map
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normal application pages.
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config SCHED_SMT
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bool "SMT (Hyperthreading) scheduler support"
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depends on PPC64 && SMP
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help
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SMT scheduler support improves the CPU scheduler's decision making
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when dealing with POWER5 cpus at a cost of slightly increased
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overhead in some places. If unsure say N here.
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config PROC_DEVICETREE
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bool "Support for device tree in /proc"
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depends on PROC_FS
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help
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This option adds a device-tree directory under /proc which contains
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an image of the device tree that the kernel copies from Open
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Firmware or other boot firmware. If unsure, say Y here.
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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config CMDLINE
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string "Initial kernel command string"
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depends on CMDLINE_BOOL
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default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
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help
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On some platforms, there is currently no way for the boot loader to
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pass arguments to the kernel. For these platforms, you can supply
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some command-line options at build time by entering them here. In
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most cases you will need to specify the root device here.
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if !44x || BROKEN
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source kernel/power/Kconfig
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endif
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config SECCOMP
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bool "Enable seccomp to safely compute untrusted bytecode"
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depends on PROC_FS
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default y
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help
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This kernel feature is useful for number crunching applications
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that may need to compute untrusted bytecode during their
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execution. By using pipes or other transports made available to
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the process as file descriptors supporting the read/write
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syscalls, it's possible to isolate those applications in
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their own address space using seccomp. Once seccomp is
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enabled via /proc/<pid>/seccomp, it cannot be disabled
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and the task is only allowed to execute a few safe syscalls
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defined by each seccomp mode.
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If unsure, say Y. Only embedded should say N here.
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config WANT_DEVICE_TREE
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bool
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default n
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config DEVICE_TREE
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string "Static device tree source file"
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depends on WANT_DEVICE_TREE
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help
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This specifies the device tree source (.dts) file to be
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compiled and included when building the bootwrapper. If a
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relative filename is given, then it will be relative to
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arch/powerpc/boot/dts. If you are not using the bootwrapper,
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or do not need to build a dts into the bootwrapper, this
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field is ignored.
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For example, this is required when building a cuImage target
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for an older U-Boot, which cannot pass a device tree itself.
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Such a kernel will not work with a newer U-Boot that tries to
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pass a device tree (unless you tell it not to). If your U-Boot
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does not mention a device tree in "help bootm", then use the
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cuImage target and specify a device tree here. Otherwise, use
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the uImage target and leave this field blank.
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endmenu
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config ISA_DMA_API
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bool
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default y
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menu "Bus options"
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config ISA
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bool "Support for ISA-bus hardware"
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depends on PPC_PREP || PPC_CHRP
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select PPC_I8259
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help
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Find out whether you have ISA slots on your motherboard. ISA is the
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name of a bus system, i.e. the way the CPU talks to the other stuff
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inside your box. If you have an Apple machine, say N here; if you
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have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
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you have an embedded board, consult your board documentation.
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config ZONE_DMA
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bool
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default y
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config GENERIC_ISA_DMA
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bool
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depends on PPC64 || POWER4 || 6xx && !CPM2
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default y
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config PPC_INDIRECT_PCI
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bool
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depends on PCI
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default y if 40x || 44x
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default n
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config EISA
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bool
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config SBUS
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bool
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config FSL_SOC
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bool
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config FSL_PCI
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bool
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select PPC_INDIRECT_PCI
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# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
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config MCA
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bool
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config PCI
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bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
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|| PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
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|| PPC_PS3
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default y if !40x && !CPM2 && !8xx && !PPC_83xx \
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&& !PPC_85xx && !PPC_86xx
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default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
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default PCI_QSPAN if !4xx && !CPM2 && 8xx
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select ARCH_SUPPORTS_MSI
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help
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Find out whether your system includes a PCI bus. PCI is the name of
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a bus system, i.e. the way the CPU talks to the other stuff inside
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your box. If you say Y here, the kernel will include drivers and
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infrastructure code to support PCI bus devices.
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config PCI_DOMAINS
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def_bool PCI
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config PCI_SYSCALL
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def_bool PCI
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config PCI_QSPAN
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bool "QSpan PCI"
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depends on !4xx && !CPM2 && 8xx
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select PPC_I8259
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help
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Say Y here if you have a system based on a Motorola 8xx-series
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embedded processor with a QSPAN PCI interface, otherwise say N.
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config PCI_8260
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bool
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depends on PCI && 8260
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select PPC_INDIRECT_PCI
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default y
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config 8260_PCI9
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bool "Enable workaround for MPC826x erratum PCI 9"
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depends on PCI_8260 && !8272
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default y
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choice
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prompt "IDMA channel for PCI 9 workaround"
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depends on 8260_PCI9
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config 8260_PCI9_IDMA1
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bool "IDMA1"
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config 8260_PCI9_IDMA2
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bool "IDMA2"
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config 8260_PCI9_IDMA3
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bool "IDMA3"
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config 8260_PCI9_IDMA4
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bool "IDMA4"
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endchoice
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source "drivers/pci/pcie/Kconfig"
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source "drivers/pci/Kconfig"
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source "drivers/pcmcia/Kconfig"
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source "drivers/pci/hotplug/Kconfig"
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endmenu
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menu "Advanced setup"
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depends on PPC32
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config ADVANCED_OPTIONS
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bool "Prompt for advanced kernel configuration options"
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help
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This option will enable prompting for a variety of advanced kernel
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configuration options. These options can cause the kernel to not
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work if they are set incorrectly, but can be used to optimize certain
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aspects of kernel memory management.
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Unless you know what you are doing, say N here.
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comment "Default settings for advanced configuration options are used"
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depends on !ADVANCED_OPTIONS
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config HIGHMEM_START_BOOL
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bool "Set high memory pool address"
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depends on ADVANCED_OPTIONS && HIGHMEM
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help
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This option allows you to set the base address of the kernel virtual
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area used to map high memory pages. This can be useful in
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optimizing the layout of kernel virtual memory.
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Say N here unless you know what you are doing.
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config HIGHMEM_START
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hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
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default "0xfe000000"
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config LOWMEM_SIZE_BOOL
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bool "Set maximum low memory"
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depends on ADVANCED_OPTIONS
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help
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This option allows you to set the maximum amount of memory which
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will be used as "low memory", that is, memory which the kernel can
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access directly, without having to set up a kernel virtual mapping.
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This can be useful in optimizing the layout of kernel virtual
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memory.
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Say N here unless you know what you are doing.
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config LOWMEM_SIZE
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hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
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default "0x30000000"
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config KERNEL_START_BOOL
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bool "Set custom kernel base address"
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depends on ADVANCED_OPTIONS
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help
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This option allows you to set the kernel virtual address at which
|
|
the kernel will map low memory (the kernel image will be linked at
|
|
this address). This can be useful in optimizing the virtual memory
|
|
layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config KERNEL_START
|
|
hex "Virtual address of kernel base" if KERNEL_START_BOOL
|
|
default "0xc0000000"
|
|
|
|
config TASK_SIZE_BOOL
|
|
bool "Set custom user task size"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the amount of virtual address space
|
|
allocated to user tasks. This can be useful in optimizing the
|
|
virtual memory layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config TASK_SIZE
|
|
hex "Size of user task space" if TASK_SIZE_BOOL
|
|
default "0x80000000" if PPC_PREP || PPC_8xx
|
|
default "0xc0000000"
|
|
|
|
config CONSISTENT_START_BOOL
|
|
bool "Set custom consistent memory pool address"
|
|
depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
|
|
help
|
|
This option allows you to set the base virtual address
|
|
of the consistent memory pool. This pool of virtual
|
|
memory is used to make consistent memory allocations.
|
|
|
|
config CONSISTENT_START
|
|
hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
|
|
default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
|
|
default "0xff100000" if NOT_COHERENT_CACHE
|
|
|
|
config CONSISTENT_SIZE_BOOL
|
|
bool "Set custom consistent memory pool size"
|
|
depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
|
|
help
|
|
This option allows you to set the size of the
|
|
consistent memory pool. This pool of virtual memory
|
|
is used to make consistent memory allocations.
|
|
|
|
config CONSISTENT_SIZE
|
|
hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
|
|
default "0x00200000" if NOT_COHERENT_CACHE
|
|
|
|
config BOOT_LOAD_BOOL
|
|
bool "Set the boot link/load address"
|
|
depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
|
|
help
|
|
This option allows you to set the initial load address of the zImage
|
|
or zImage.initrd file. This can be useful if you are on a board
|
|
which has a small amount of memory.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config BOOT_LOAD
|
|
hex "Link/load address for booting" if BOOT_LOAD_BOOL
|
|
default "0x00400000" if 40x || 8xx || 8260
|
|
default "0x01000000" if 44x
|
|
default "0x00800000"
|
|
|
|
config PIN_TLB
|
|
bool "Pinned Kernel TLBs (860 ONLY)"
|
|
depends on ADVANCED_OPTIONS && 8xx
|
|
endmenu
|
|
|
|
if PPC64
|
|
config KERNEL_START
|
|
hex
|
|
default "0xc000000000000000"
|
|
endif
|
|
|
|
source "net/Kconfig"
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
# XXX source "arch/ppc/8xx_io/Kconfig"
|
|
|
|
# XXX source "arch/ppc/8260_io/Kconfig"
|
|
|
|
source "arch/powerpc/sysdev/qe_lib/Kconfig"
|
|
|
|
source "lib/Kconfig"
|
|
|
|
source "kernel/Kconfig.instrumentation"
|
|
|
|
source "arch/powerpc/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
config KEYS_COMPAT
|
|
bool
|
|
depends on COMPAT && KEYS
|
|
default y
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
config PPC_CLOCK
|
|
bool
|
|
default n
|
|
|
|
config PPC_LIB_RHEAP
|
|
bool
|
|
|