1 source "arch/powerpc/platforms/Kconfig.cputype"
15 config ARCH_PHYS_ADDR_T_64BIT
16 def_bool PPC64 || PHYS_64BIT
18 config ARCH_DMA_ADDR_T_64BIT
19 def_bool ARCH_PHYS_ADDR_T_64BIT
25 config HAVE_SETUP_PER_CPU_AREA
28 config NEED_PER_CPU_EMBED_FIRST_CHUNK
32 int "Number of virtual interrupt numbers"
36 This defines the number of virtual interrupt numbers the kernel
37 can manage. Virtual interrupt numbers are what you see in
38 /proc/interrupts. If you configure your system to have too few,
39 drivers will fail to load or worse - handle with care.
41 config STACKTRACE_SUPPORT
45 config TRACE_IRQFLAGS_SUPPORT
49 config LOCKDEP_SUPPORT
53 config RWSEM_GENERIC_SPINLOCK
56 config RWSEM_XCHGADD_ALGORITHM
60 config GENERIC_LOCKBREAK
63 depends on SMP && PREEMPT
65 config ARCH_HAS_ILOG2_U32
69 config ARCH_HAS_ILOG2_U64
73 config GENERIC_HWEIGHT
77 config ARCH_HAS_DMA_SET_COHERENT_MASK
83 select BUILDTIME_EXTABLE_SORT
84 select ARCH_MIGHT_HAVE_PC_PARPORT
85 select ARCH_MIGHT_HAVE_PC_SERIO
87 select ARCH_HAS_ELF_RANDOMIZE
89 select OF_EARLY_FLATTREE
90 select OF_RESERVED_MEM
91 select HAVE_FTRACE_MCOUNT_RECORD
92 select HAVE_DYNAMIC_FTRACE
93 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
94 select HAVE_FUNCTION_TRACER
95 select HAVE_FUNCTION_GRAPH_TRACER
96 select SYSCTL_EXCEPTION_TRACE
97 select VIRT_TO_BUS if !PPC64
99 select HAVE_IOREMAP_PROT
100 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
102 select HAVE_ARCH_KGDB
103 select HAVE_KRETPROBES
104 select HAVE_ARCH_TRACEHOOK
106 select HAVE_MEMBLOCK_NODE_MAP
107 select HAVE_DMA_API_DEBUG
109 select HAVE_DEBUG_KMEMLEAK
110 select ARCH_HAS_SG_CHAIN
111 select GENERIC_ATOMIC64 if PPC32
112 select HAVE_PERF_EVENTS
113 select HAVE_PERF_REGS
114 select HAVE_PERF_USER_STACK_DUMP
115 select HAVE_REGS_AND_STACK_ACCESS_API
116 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
117 select ARCH_WANT_IPC_PARSE_VERSION
120 select GENERIC_IRQ_SHOW
121 select GENERIC_IRQ_SHOW_LEVEL
122 select IRQ_FORCED_THREADING
123 select HAVE_RCU_TABLE_FREE if SMP
124 select HAVE_SYSCALL_TRACEPOINTS
125 select HAVE_CBPF_JIT if !PPC64
126 select HAVE_EBPF_JIT if PPC64
127 select HAVE_ARCH_JUMP_LABEL
128 select ARCH_HAVE_NMI_SAFE_CMPXCHG
129 select ARCH_HAS_GCOV_PROFILE_ALL
130 select GENERIC_SMP_IDLE_THREAD
131 select GENERIC_CMOS_UPDATE
132 select GENERIC_TIME_VSYSCALL_OLD
133 select GENERIC_CLOCKEVENTS
134 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
135 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
136 select GENERIC_STRNCPY_FROM_USER
137 select GENERIC_STRNLEN_USER
138 select HAVE_MOD_ARCH_SPECIFIC
139 select MODULES_USE_ELF_RELA
140 select CLONE_BACKWARDS
141 select ARCH_USE_BUILTIN_BSWAP
142 select OLD_SIGSUSPEND
143 select OLD_SIGACTION if PPC32
144 select HAVE_DEBUG_STACKOVERFLOW
145 select HAVE_IRQ_EXIT_ON_IRQ_STACK
146 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
147 select HAVE_ARCH_AUDITSYSCALL
148 select ARCH_SUPPORTS_ATOMIC_RMW
149 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
151 select HAVE_GENERIC_RCU_GUP
152 select HAVE_PERF_EVENTS_NMI if PPC64
153 select HAVE_NMI if PERF_EVENTS
155 select EDAC_ATOMIC_SCRUB
156 select ARCH_HAS_DMA_SET_COHERENT_MASK
157 select ARCH_HAS_DEVMEM_IS_ALLOWED
158 select HAVE_ARCH_SECCOMP_FILTER
159 select ARCH_HAS_UBSAN_SANITIZE_ALL
160 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
161 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
162 select GENERIC_CPU_AUTOPROBE
163 select HAVE_VIRT_CPU_ACCOUNTING
164 select HAVE_ARCH_HARDENED_USERCOPY
165 select HAVE_KERNEL_GZIP
166 select HAVE_CC_STACKPROTECTOR
169 def_bool CPU_LITTLE_ENDIAN
182 select COMPAT_BINFMT_ELF
183 select ARCH_WANT_OLD_COMPAT_IPC
184 select COMPAT_OLD_SIGACTION
186 config SYSVIPC_COMPAT
188 depends on COMPAT && SYSVIPC
191 # All PPC32s use generic nvram driver through ppc_md
196 config SCHED_OMIT_FRAME_POINTER
200 config ARCH_MAY_HAVE_PC_FDC
204 config PPC_UDBG_16550
208 config GENERIC_TBSYNC
210 default y if PPC32 && SMP
222 config SYS_SUPPORTS_APM_EMULATION
223 default y if PMAC_APM_EMU
229 Used to allow a board to specify it wants an ePAPR compliant wrapper.
232 config DEFAULT_UIMAGE
235 Used to allow a board to specify it wants a uImage built by default
238 config ARCH_HIBERNATION_POSSIBLE
242 config ARCH_SUSPEND_POSSIBLE
244 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
245 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
248 config PPC_DCR_NATIVE
258 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
261 config PPC_OF_PLATFORM_PCI
264 depends on PPC64 # not supported on 32 bits yet
267 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
268 depends on PPC32 || PPC_STD_MMU_64
271 config ARCH_SUPPORTS_UPROBES
274 config PPC_ADV_DEBUG_REGS
276 depends on 40x || BOOKE
279 config PPC_ADV_DEBUG_IACS
281 depends on PPC_ADV_DEBUG_REGS
285 config PPC_ADV_DEBUG_DACS
287 depends on PPC_ADV_DEBUG_REGS
290 config PPC_ADV_DEBUG_DVCS
292 depends on PPC_ADV_DEBUG_REGS
296 config PPC_ADV_DEBUG_DAC_RANGE
298 depends on PPC_ADV_DEBUG_REGS && 44x
301 config PPC_EMULATE_SSTEP
303 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
309 config PGTABLE_LEVELS
312 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
315 source "init/Kconfig"
317 source "kernel/Kconfig.freezer"
319 source "arch/powerpc/sysdev/Kconfig"
320 source "arch/powerpc/platforms/Kconfig"
322 menu "Kernel options"
325 bool "High memory support"
328 source kernel/Kconfig.hz
329 source kernel/Kconfig.preempt
330 source "fs/Kconfig.binfmt"
332 config HUGETLB_PAGE_SIZE_VARIABLE
334 depends on HUGETLB_PAGE
337 config MATH_EMULATION
338 bool "Math emulation"
339 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
341 Some PowerPC chips designed for embedded applications do not have
342 a floating-point unit and therefore do not implement the
343 floating-point instructions in the PowerPC instruction set. If you
344 say Y here, the kernel will include code to emulate a floating-point
345 unit, which will allow programs that use floating-point
348 This is also useful to emulate missing (optional) instructions
349 such as fsqrt on cores that do have an FPU but do not implement
350 them (such as Freescale BookE).
353 prompt "Math emulation options"
354 default MATH_EMULATION_FULL
355 depends on MATH_EMULATION
357 config MATH_EMULATION_FULL
358 bool "Emulate all the floating point instructions"
360 Select this option will enable the kernel to support to emulate
361 all the floating point instructions. If your SoC doesn't have
362 a FPU, you should select this.
364 config MATH_EMULATION_HW_UNIMPLEMENTED
365 bool "Just emulate the FPU unimplemented instructions"
367 Select this if you know there does have a hardware FPU on your
368 SoC, but some floating point instructions are not implemented by that.
372 config PPC_TRANSACTIONAL_MEM
373 bool "Transactional Memory support for POWERPC"
374 depends on PPC_BOOK3S_64
380 Support user-mode Transactional Memory on POWERPC.
382 config DISABLE_MPROFILE_KERNEL
383 bool "Disable use of mprofile-kernel for kernel tracing"
384 depends on PPC64 && CPU_LITTLE_ENDIAN
387 Selecting this options disables use of the mprofile-kernel ABI for
388 kernel tracing. That will cause options such as live patching
389 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
392 If you have a toolchain which supports mprofile-kernel, then you can
393 enable this. Otherwise leave it disabled. If you're not sure, say
396 config MPROFILE_KERNEL
397 depends on PPC64 && CPU_LITTLE_ENDIAN
398 def_bool !DISABLE_MPROFILE_KERNEL
400 config USE_THIN_ARCHIVES
401 bool "Build the kernel using thin archives"
405 Build the kernel using thin archives.
406 If you're unsure say N.
412 bool "SWIOTLB support"
416 Support for IO bounce buffering for systems without an IOMMU.
417 This allows us to DMA to the full physical address space on
418 platforms where the size of a physical address is larger
419 than the bus address. Not all platforms support this.
422 bool "Support for enabling/disabling CPUs"
423 depends on SMP && (PPC_PSERIES || \
424 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
426 Say Y here to be able to disable and re-enable individual
427 CPUs at runtime on SMP machines.
429 Say N if you are unsure.
431 config ARCH_CPU_PROBE_RELEASE
433 depends on HOTPLUG_CPU
435 config ARCH_ENABLE_MEMORY_HOTPLUG
438 config ARCH_HAS_WALK_MEMORY
441 config ARCH_ENABLE_MEMORY_HOTREMOVE
444 config PPC64_SUPPORTS_MEMORY_FAILURE
445 bool "Add support for memory hwpoison"
446 depends on PPC_BOOK3S_64
447 default "y" if PPC_POWERNV
448 select ARCH_SUPPORTS_MEMORY_FAILURE
451 bool "kexec system call"
452 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
455 kexec is a system call that implements the ability to shutdown your
456 current kernel, and to start another kernel. It is like a reboot
457 but it is independent of the system firmware. And like a reboot
458 you can start any kernel with it, not just Linux.
460 The name comes from the similarity to the exec system call.
462 It is an ongoing process to be certain the hardware in a machine
463 is properly shutdown, so do not be surprised if this code does not
464 initially work for you. As of this writing the exact hardware
465 interface is strongly in flux, so no good recommendation can be
469 bool "kexec file based system call"
474 depends on CRYPTO_SHA256=y
476 This is a new version of the kexec system call. This call is
477 file based and takes in file descriptors as system call arguments
478 for kernel and initramfs as opposed to a list of segments as is the
479 case for the older kexec call.
482 bool "Build a relocatable kernel"
483 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
484 select NONSTATIC_KERNEL
486 This builds a kernel image that is capable of running at the
487 location the kernel is loaded at. For ppc32, there is no any
488 alignment restrictions, and this feature is a superset of
489 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
490 16k-aligned base address. The kernel is linked as a
491 position-independent executable (PIE) and contains dynamic relocations
492 which are processed early in the bootup process.
494 One use is for the kexec on panic case where the recovery kernel
495 must live at a different physical address than the primary
498 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
499 it has been loaded at and the compile time physical addresses
500 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
501 setting can still be useful to bootwrappers that need to know the
502 load address of the kernel (eg. u-boot/mkimage).
504 config RELOCATABLE_TEST
505 bool "Test relocatable kernel"
506 depends on (PPC64 && RELOCATABLE)
509 This runs the relocatable kernel at the address it was initially
510 loaded at, which tends to be non-zero and therefore test the
514 bool "Build a kdump crash kernel"
515 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
516 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
518 Build a kernel suitable for use as a kdump capture kernel.
519 The same kernel binary can be used as production kernel and dump
523 bool "Firmware-assisted dump"
524 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
526 A robust mechanism to get reliable kernel crash dump with
527 assistance from firmware. This approach does not use kexec,
528 instead firmware assists in booting the kdump kernel
529 while preserving memory contents. Firmware-assisted dump
530 is meant to be a kdump replacement offering robustness and
531 speed not possible without system firmware assistance.
536 bool "Distribute interrupts on all CPUs by default"
539 This option gives the kernel permission to distribute IRQs across
540 multiple CPUs. Saying N here will route all IRQs to the first
541 CPU. Generally saying Y is safe, although some problems have been
542 reported with SMP Power Macintoshes with this option enabled.
547 default y if SMP && PPC_PSERIES
553 depends on NEED_MULTIPLE_NODES
555 config USE_PERCPU_NUMA_NODE_ID
559 config HAVE_MEMORYLESS_NODES
563 config ARCH_SELECT_MEMORY_MODEL
567 config ARCH_FLATMEM_ENABLE
569 depends on (PPC64 && !NUMA) || PPC32
571 config ARCH_SPARSEMEM_ENABLE
574 select SPARSEMEM_VMEMMAP_ENABLE
576 config ARCH_SPARSEMEM_DEFAULT
578 depends on (SMP && PPC_PSERIES) || PPC_PS3
580 config SYS_SUPPORTS_HUGETLBFS
583 config ILLEGAL_POINTER_VALUE
585 # This is roughly half way between the top of user space and the bottom
586 # of kernel space, which seems about as good as we can get.
587 default 0x5deadbeef0000000 if PPC64
592 config ARCH_MEMORY_PROBE
594 depends on MEMORY_HOTPLUG
596 # Some NUMA nodes have memory ranges that span
597 # other nodes. Even though a pfn is valid and
598 # between a node's start and end pfns, it may not
599 # reside on that node. See memmap_init_zone()
601 config NODES_SPAN_OTHER_NODES
603 depends on NEED_MULTIPLE_NODES
606 bool "Using standard binutils settings"
610 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
611 Note, that kernel will be able to run only those applications,
612 which had been compiled using binutils later than 2.17.50.0.3 with
613 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
614 the older binutils, you can patch them with a trivial patch, which
615 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
621 Select the kernel logical page size. Increasing the page size
622 will reduce software overhead at each page boundary, allow
623 hardware prefetch mechanisms to be more effective, and allow
624 larger dma transfers increasing IO efficiency and reducing
625 overhead. However the utilization of memory will increase.
626 For example, each cached file will using a multiple of the
627 page size to hold its contents and the difference between the
628 end of file and the end of page is wasted.
630 Some dedicated systems, such as software raid serving with
631 accelerated calculations, have shown significant increases.
633 If you configure a 64 bit kernel for 64k pages but the
634 processor does not support them, then the kernel will simulate
635 them with 4k pages, loading them on demand, but with the
636 reduced software overhead and larger internal fragmentation.
637 For the 32 bit kernel, a large page option will not be offered
638 unless it is supported by the configured processor.
640 If unsure, choose 4K_PAGES.
644 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
648 depends on 44x || PPC_8xx
652 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
653 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
655 config PPC_256K_PAGES
656 bool "256k page size"
657 depends on 44x && !STDBINUTILS
659 Make the page size 256k.
661 As the ELF standard only requires alignment to support page
662 sizes up to 64k, you will need to compile all of your user
663 space applications with a non-standard binutils settings
664 (see the STDBINUTILS description for details).
666 Say N unless you know what you are doing.
670 config FORCE_MAX_ZONEORDER
671 int "Maximum zone order"
672 range 8 9 if PPC64 && PPC_64K_PAGES
673 default "9" if PPC64 && PPC_64K_PAGES
674 range 13 13 if PPC64 && !PPC_64K_PAGES
675 default "13" if PPC64 && !PPC_64K_PAGES
676 range 9 64 if PPC32 && PPC_16K_PAGES
677 default "9" if PPC32 && PPC_16K_PAGES
678 range 7 64 if PPC32 && PPC_64K_PAGES
679 default "7" if PPC32 && PPC_64K_PAGES
680 range 5 64 if PPC32 && PPC_256K_PAGES
681 default "5" if PPC32 && PPC_256K_PAGES
685 The kernel memory allocator divides physically contiguous memory
686 blocks into "zones", where each zone is a power of two number of
687 pages. This option selects the largest power of two that the kernel
688 keeps in the memory allocator. If you need to allocate very large
689 blocks of physically contiguous memory, then you may need to
692 This config option is actually maximum order plus one. For example,
693 a value of 11 means that the largest free memory block is 2^10 pages.
695 The page size is not necessarily 4KB. For example, on 64-bit
696 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
697 this in mind when choosing a value for this option.
699 config PPC_SUBPAGE_PROT
700 bool "Support setting protections for 4k subpages"
701 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
703 This option adds support for a system call to allow user programs
704 to set access permissions (read/write, readonly, or no access)
705 on the 4k subpages of each 64k page.
707 config PPC_COPRO_BASE
712 bool "SMT (Hyperthreading) scheduler support"
713 depends on PPC64 && SMP
715 SMT scheduler support improves the CPU scheduler's decision making
716 when dealing with POWER5 cpus at a cost of slightly increased
717 overhead in some places. If unsure say N here.
719 config PPC_DENORMALISATION
720 bool "PowerPC denormalisation exception handling"
721 depends on PPC_BOOK3S_64
722 default "y" if PPC_POWERNV
724 Add support for handling denormalisation of single precision
725 values. Useful for bare metal only. If unsure say Y here.
728 bool "Default bootloader kernel arguments"
731 string "Initial kernel command string"
732 depends on CMDLINE_BOOL
733 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
735 On some platforms, there is currently no way for the boot loader to
736 pass arguments to the kernel. For these platforms, you can supply
737 some command-line options at build time by entering them here. In
738 most cases you will need to specify the root device here.
741 bool "Always use the default kernel command string"
742 depends on CMDLINE_BOOL
744 Always use the default kernel command string, even if the boot
745 loader passes other arguments to the kernel.
746 This is useful if you cannot or don't want to change the
747 command-line options your boot loader passes to the kernel.
750 string "Additional default image types"
752 List additional targets to be built by the bootwrapper here (separated
753 by spaces). This is useful for targets that depend of device tree
754 files in the .dts directory.
756 Targets in this list will be build as part of the default build
757 target, or when the user does a 'make zImage' or a
758 'make zImage.initrd'.
760 If unsure, leave blank
762 config ARCH_WANTS_FREEZER_CONTROL
766 source kernel/power/Kconfig
769 bool "Enable seccomp to safely compute untrusted bytecode"
773 This kernel feature is useful for number crunching applications
774 that may need to compute untrusted bytecode during their
775 execution. By using pipes or other transports made available to
776 the process as file descriptors supporting the read/write
777 syscalls, it's possible to isolate those applications in
778 their own address space using seccomp. Once seccomp is
779 enabled via /proc/<pid>/seccomp, it cannot be disabled
780 and the task is only allowed to execute a few safe syscalls
781 defined by each seccomp mode.
783 If unsure, say Y. Only embedded should say N here.
794 bool "Support for ISA-bus hardware"
798 Find out whether you have ISA slots on your motherboard. ISA is the
799 name of a bus system, i.e. the way the CPU talks to the other stuff
800 inside your box. If you have an Apple machine, say N here; if you
801 have an IBM RS/6000 or pSeries machine, say Y. If you have an
802 embedded board, consult your board documentation.
808 config NEED_DMA_MAP_STATE
809 def_bool (PPC64 || NOT_COHERENT_CACHE)
811 config NEED_SG_DMA_LENGTH
814 config GENERIC_ISA_DMA
816 depends on ISA_DMA_API
819 config PPC_INDIRECT_PCI
822 default y if 40x || 44x
836 select PPC_INDIRECT_PCI
842 depends on SUSPEND && (PPC_85xx || PPC_86xx)
844 Freescale MPC85xx/MPC86xx power management controller support
845 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
850 depends on SUSPEND && (44x || 40x)
852 PPC4xx Clock Power Management (CPM) support (suspend/resume).
853 It also enables support for two different idle states (idle-wait
860 bool "Freescale Local Bus support"
862 Enables reporting of errors from the Freescale local bus
863 controller. Also contains some common code used by
864 drivers for specific local bus peripherals.
868 depends on PPC_83xx || QUICC_ENGINE || CPM2
870 Freescale General-purpose Timers support
872 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
876 # Platforms that what PCI turned unconditionally just do select PCI
877 # in their config node. Platforms that want to choose at config
878 # time should select PPC_PCI_CHOICE
879 config PPC_PCI_CHOICE
883 bool "PCI support" if PPC_PCI_CHOICE
884 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
885 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
886 default PCI_QSPAN if !4xx && !CPM2 && 8xx
887 select GENERIC_PCI_IOMAP
889 Find out whether your system includes a PCI bus. PCI is the name of
890 a bus system, i.e. the way the CPU talks to the other stuff inside
891 your box. If you say Y here, the kernel will include drivers and
892 infrastructure code to support PCI bus devices.
902 depends on !4xx && !CPM2 && 8xx
905 Say Y here if you have a system based on a Motorola 8xx-series
906 embedded processor with a QSPAN PCI interface, otherwise say N.
910 depends on PCI && 8260
911 select PPC_INDIRECT_PCI
914 source "drivers/pci/Kconfig"
916 source "drivers/pcmcia/Kconfig"
923 tristate "RapidIO support"
924 depends on HAS_RAPIDIO || PCI
926 If you say Y here, the kernel will include drivers and
927 infrastructure code to support RapidIO interconnect devices.
930 bool "Freescale Embedded SRIO Controller support"
931 depends on RAPIDIO = y && HAS_RAPIDIO
934 Include support for RapidIO controller on Freescale embedded
935 processors (MPC8548, MPC8641, etc).
937 source "drivers/rapidio/Kconfig"
941 config NONSTATIC_KERNEL
945 menu "Advanced setup"
948 config ADVANCED_OPTIONS
949 bool "Prompt for advanced kernel configuration options"
951 This option will enable prompting for a variety of advanced kernel
952 configuration options. These options can cause the kernel to not
953 work if they are set incorrectly, but can be used to optimize certain
954 aspects of kernel memory management.
956 Unless you know what you are doing, say N here.
958 comment "Default settings for advanced configuration options are used"
959 depends on !ADVANCED_OPTIONS
961 config LOWMEM_SIZE_BOOL
962 bool "Set maximum low memory"
963 depends on ADVANCED_OPTIONS
965 This option allows you to set the maximum amount of memory which
966 will be used as "low memory", that is, memory which the kernel can
967 access directly, without having to set up a kernel virtual mapping.
968 This can be useful in optimizing the layout of kernel virtual
971 Say N here unless you know what you are doing.
974 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
977 config LOWMEM_CAM_NUM_BOOL
978 bool "Set number of CAMs to use to map low memory"
979 depends on ADVANCED_OPTIONS && FSL_BOOKE
981 This option allows you to set the maximum number of CAM slots that
982 will be used to map low memory. There are a limited number of slots
983 available and even more limited number that will fit in the L1 MMU.
984 However, using more entries will allow mapping more low memory. This
985 can be useful in optimizing the layout of kernel virtual memory.
987 Say N here unless you know what you are doing.
989 config LOWMEM_CAM_NUM
991 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
994 config DYNAMIC_MEMSTART
995 bool "Enable page aligned dynamic load address for kernel"
996 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
997 select NONSTATIC_KERNEL
999 This option enables the kernel to be loaded at any page aligned
1000 physical address. The kernel creates a mapping from KERNELBASE to
1001 the address where the kernel is loaded. The page size here implies
1002 the TLB page size of the mapping for kernel on the particular platform.
1003 Please refer to the init code for finding the TLB page size.
1005 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1006 kernel image, where the only restriction is the page aligned kernel
1007 load address. When this option is enabled, the compile time physical
1008 address CONFIG_PHYSICAL_START is ignored.
1010 This option is overridden by CONFIG_RELOCATABLE
1012 config PAGE_OFFSET_BOOL
1013 bool "Set custom page offset address"
1014 depends on ADVANCED_OPTIONS
1016 This option allows you to set the kernel virtual address at which
1017 the kernel will map low memory. This can be useful in optimizing
1018 the virtual memory layout of the system.
1020 Say N here unless you know what you are doing.
1023 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1024 default "0xc0000000"
1026 config KERNEL_START_BOOL
1027 bool "Set custom kernel base address"
1028 depends on ADVANCED_OPTIONS
1030 This option allows you to set the kernel virtual address at which
1031 the kernel will be loaded. Normally this should match PAGE_OFFSET
1032 however there are times (like kdump) that one might not want them
1035 Say N here unless you know what you are doing.
1038 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1039 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1040 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1041 default "0xc0000000"
1043 config PHYSICAL_START_BOOL
1044 bool "Set physical address where the kernel is loaded"
1045 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1047 This gives the physical address where the kernel is loaded.
1049 Say N here unless you know what you are doing.
1051 config PHYSICAL_START
1052 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1053 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1054 default "0x00000000"
1056 config PHYSICAL_ALIGN
1058 default "0x04000000" if FSL_BOOKE
1060 This value puts the alignment restrictions on physical address
1061 where kernel is loaded and run from. Kernel is compiled for an
1062 address which meets above alignment restriction.
1064 config TASK_SIZE_BOOL
1065 bool "Set custom user task size"
1066 depends on ADVANCED_OPTIONS
1068 This option allows you to set the amount of virtual address space
1069 allocated to user tasks. This can be useful in optimizing the
1070 virtual memory layout of the system.
1072 Say N here unless you know what you are doing.
1075 hex "Size of user task space" if TASK_SIZE_BOOL
1076 default "0x80000000" if PPC_8xx
1077 default "0xc0000000"
1079 config CONSISTENT_SIZE_BOOL
1080 bool "Set custom consistent memory pool size"
1081 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1083 This option allows you to set the size of the
1084 consistent memory pool. This pool of virtual memory
1085 is used to make consistent memory allocations.
1087 config CONSISTENT_SIZE
1088 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1089 default "0x00200000" if NOT_COHERENT_CACHE
1092 bool "Pinned Kernel TLBs (860 ONLY)"
1093 depends on ADVANCED_OPTIONS && 8xx
1096 bool "Pinned TLB for IMMR"
1102 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1105 default "0xc000000000000000"
1108 default "0xc000000000000000"
1109 config PHYSICAL_START
1111 default "0x00000000"
1117 source "net/Kconfig"
1119 source "drivers/Kconfig"
1123 source "lib/Kconfig"
1125 source "arch/powerpc/Kconfig.debug"
1127 source "security/Kconfig"
1131 depends on COMPAT && KEYS
1134 source "crypto/Kconfig"
1136 config PPC_LIB_RHEAP
1139 source "arch/powerpc/kvm/Kconfig"
1141 source "kernel/livepatch/Kconfig"