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