1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
23 config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
30 config HAVE_SETUP_PER_CPU_AREA
33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
37 int "Number of virtual interrupt numbers"
41 This defines the number of virtual interrupt numbers the kernel
42 can manage. Virtual interrupt numbers are what you see in
43 /proc/interrupts. If you configure your system to have too few,
44 drivers will fail to load or worse - handle with care.
46 config STACKTRACE_SUPPORT
50 config HAVE_LATENCYTOP_SUPPORT
53 config TRACE_IRQFLAGS_SUPPORT
57 config LOCKDEP_SUPPORT
61 config RWSEM_GENERIC_SPINLOCK
64 config RWSEM_XCHGADD_ALGORITHM
68 config GENERIC_LOCKBREAK
71 depends on SMP && PREEMPT
73 config ARCH_HAS_ILOG2_U32
77 config ARCH_HAS_ILOG2_U64
81 config GENERIC_HWEIGHT
88 Generic GPIO API support
94 select OF_EARLY_FLATTREE
95 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
97 select HAVE_FUNCTION_TRACER
98 select HAVE_FUNCTION_GRAPH_TRACER
99 select SYSCTL_EXCEPTION_TRACE
100 select ARCH_WANT_OPTIONAL_GPIOLIB
101 select HAVE_VIRT_TO_BUS if !PPC64
103 select HAVE_IOREMAP_PROT
104 select HAVE_EFFICIENT_UNALIGNED_ACCESS
106 select HAVE_ARCH_KGDB
107 select HAVE_KRETPROBES
108 select HAVE_ARCH_TRACEHOOK
110 select HAVE_MEMBLOCK_NODE_MAP
111 select HAVE_DMA_ATTRS
112 select HAVE_DMA_API_DEBUG
113 select USE_GENERIC_SMP_HELPERS if SMP
115 select HAVE_DEBUG_KMEMLEAK
116 select GENERIC_ATOMIC64 if PPC32
117 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
118 select HAVE_PERF_EVENTS
119 select HAVE_REGS_AND_STACK_ACCESS_API
120 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
121 select HAVE_GENERIC_HARDIRQS
122 select ARCH_WANT_IPC_PARSE_VERSION
125 select GENERIC_IRQ_SHOW
126 select GENERIC_IRQ_SHOW_LEVEL
127 select IRQ_FORCED_THREADING
128 select HAVE_RCU_TABLE_FREE if SMP
129 select HAVE_SYSCALL_TRACEPOINTS
130 select HAVE_BPF_JIT if PPC64
131 select HAVE_ARCH_JUMP_LABEL
132 select ARCH_HAVE_NMI_SAFE_CMPXCHG
133 select GENERIC_SMP_IDLE_THREAD
134 select GENERIC_CMOS_UPDATE
135 select GENERIC_TIME_VSYSCALL_OLD
136 select GENERIC_CLOCKEVENTS
137 select GENERIC_STRNCPY_FROM_USER
138 select GENERIC_STRNLEN_USER
139 select HAVE_MOD_ARCH_SPECIFIC
140 select MODULES_USE_ELF_RELA
141 select CLONE_BACKWARDS
142 select ARCH_USE_BUILTIN_BSWAP
143 select OLD_SIGSUSPEND
144 select OLD_SIGACTION if PPC32
153 select COMPAT_BINFMT_ELF
154 select ARCH_WANT_OLD_COMPAT_IPC
155 select COMPAT_OLD_SIGACTION
157 config SYSVIPC_COMPAT
159 depends on COMPAT && SYSVIPC
162 # All PPC32s use generic nvram driver through ppc_md
167 config SCHED_OMIT_FRAME_POINTER
171 config ARCH_MAY_HAVE_PC_FDC
173 default !PPC_PSERIES || PCI
178 config PPC_UDBG_16550
182 config GENERIC_TBSYNC
184 default y if PPC32 && SMP
196 config SYS_SUPPORTS_APM_EMULATION
197 default y if PMAC_APM_EMU
203 Used to allow a board to specify it wants an ePAPR compliant wrapper.
206 config DEFAULT_UIMAGE
209 Used to allow a board to specify it wants a uImage built by default
215 config ARCH_HIBERNATION_POSSIBLE
219 config ARCH_SUSPEND_POSSIBLE
221 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
222 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
225 config PPC_DCR_NATIVE
235 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
238 config PPC_OF_PLATFORM_PCI
241 depends on PPC64 # not supported on 32 bits yet
244 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
247 config ARCH_SUPPORTS_UPROBES
250 config PPC_ADV_DEBUG_REGS
252 depends on 40x || BOOKE
255 config PPC_ADV_DEBUG_IACS
257 depends on PPC_ADV_DEBUG_REGS
261 config PPC_ADV_DEBUG_DACS
263 depends on PPC_ADV_DEBUG_REGS
266 config PPC_ADV_DEBUG_DVCS
268 depends on PPC_ADV_DEBUG_REGS
272 config PPC_ADV_DEBUG_DAC_RANGE
274 depends on PPC_ADV_DEBUG_REGS && 44x
277 config PPC_EMULATE_SSTEP
279 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
281 source "init/Kconfig"
283 source "kernel/Kconfig.freezer"
285 source "arch/powerpc/sysdev/Kconfig"
286 source "arch/powerpc/platforms/Kconfig"
288 menu "Kernel options"
291 bool "High memory support"
294 source kernel/Kconfig.hz
295 source kernel/Kconfig.preempt
296 source "fs/Kconfig.binfmt"
298 config HUGETLB_PAGE_SIZE_VARIABLE
300 depends on HUGETLB_PAGE
303 config MATH_EMULATION
304 bool "Math emulation"
305 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
307 Some PowerPC chips designed for embedded applications do not have
308 a floating-point unit and therefore do not implement the
309 floating-point instructions in the PowerPC instruction set. If you
310 say Y here, the kernel will include code to emulate a floating-point
311 unit, which will allow programs that use floating-point
314 config PPC_TRANSACTIONAL_MEM
315 bool "Transactional Memory support for POWERPC"
316 depends on PPC_BOOK3S_64
320 Support user-mode Transactional Memory on POWERPC.
322 config 8XX_MINIMAL_FPEMU
323 bool "Minimal math emulation for 8xx"
324 depends on 8xx && !MATH_EMULATION
326 Older arch/ppc kernels still emulated a few floating point
327 instructions such as load and store, even when full math
328 emulation is disabled. Say "Y" here if you want to preserve
331 It is recommended that you build a soft-float userspace instead.
337 bool "SWIOTLB support"
341 Support for IO bounce buffering for systems without an IOMMU.
342 This allows us to DMA to the full physical address space on
343 platforms where the size of a physical address is larger
344 than the bus address. Not all platforms support this.
347 bool "Support for enabling/disabling CPUs"
348 depends on SMP && HOTPLUG && (PPC_PSERIES || \
349 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
351 Say Y here to be able to disable and re-enable individual
352 CPUs at runtime on SMP machines.
354 Say N if you are unsure.
356 config ARCH_CPU_PROBE_RELEASE
358 depends on HOTPLUG_CPU
360 config ARCH_ENABLE_MEMORY_HOTPLUG
363 config ARCH_HAS_WALK_MEMORY
366 config ARCH_ENABLE_MEMORY_HOTREMOVE
370 bool "kexec system call"
371 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
373 kexec is a system call that implements the ability to shutdown your
374 current kernel, and to start another kernel. It is like a reboot
375 but it is independent of the system firmware. And like a reboot
376 you can start any kernel with it, not just Linux.
378 The name comes from the similarity to the exec system call.
380 It is an ongoing process to be certain the hardware in a machine
381 is properly shutdown, so do not be surprised if this code does not
382 initially work for you. It may help to enable device hotplugging
383 support. As of this writing the exact hardware interface is
384 strongly in flux, so no good recommendation can be made.
387 bool "Build a kdump crash kernel"
388 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
389 select RELOCATABLE if PPC64 || 44x
390 select DYNAMIC_MEMSTART if FSL_BOOKE
392 Build a kernel suitable for use as a kdump capture kernel.
393 The same kernel binary can be used as production kernel and dump
397 bool "Firmware-assisted dump"
398 depends on PPC64 && PPC_RTAS && CRASH_DUMP
400 A robust mechanism to get reliable kernel crash dump with
401 assistance from firmware. This approach does not use kexec,
402 instead firmware assists in booting the kdump kernel
403 while preserving memory contents. Firmware-assisted dump
404 is meant to be a kdump replacement offering robustness and
405 speed not possible without system firmware assistance.
410 bool "Distribute interrupts on all CPUs by default"
411 depends on SMP && !MV64360
413 This option gives the kernel permission to distribute IRQs across
414 multiple CPUs. Saying N here will route all IRQs to the first
415 CPU. Generally saying Y is safe, although some problems have been
416 reported with SMP Power Macintoshes with this option enabled.
421 default y if SMP && PPC_PSERIES
427 depends on NEED_MULTIPLE_NODES
429 config MAX_ACTIVE_REGIONS
431 default "256" if PPC64
434 config ARCH_SELECT_MEMORY_MODEL
438 config ARCH_FLATMEM_ENABLE
440 depends on (PPC64 && !NUMA) || PPC32
442 config ARCH_SPARSEMEM_ENABLE
445 select SPARSEMEM_VMEMMAP_ENABLE
447 config ARCH_SPARSEMEM_DEFAULT
449 depends on (SMP && PPC_PSERIES) || PPC_PS3
451 config SYS_SUPPORTS_HUGETLBFS
456 config ARCH_MEMORY_PROBE
458 depends on MEMORY_HOTPLUG
460 # Some NUMA nodes have memory ranges that span
461 # other nodes. Even though a pfn is valid and
462 # between a node's start and end pfns, it may not
463 # reside on that node. See memmap_init_zone()
465 config NODES_SPAN_OTHER_NODES
467 depends on NEED_MULTIPLE_NODES
469 config PPC_HAS_HASH_64K
475 bool "Using standard binutils settings"
479 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
480 Note, that kernel will be able to run only those applications,
481 which had been compiled using binutils later than 2.17.50.0.3 with
482 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
483 the older binutils, you can patch them with a trivial patch, which
484 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
490 Select the kernel logical page size. Increasing the page size
491 will reduce software overhead at each page boundary, allow
492 hardware prefetch mechanisms to be more effective, and allow
493 larger dma transfers increasing IO efficiency and reducing
494 overhead. However the utilization of memory will increase.
495 For example, each cached file will using a multiple of the
496 page size to hold its contents and the difference between the
497 end of file and the end of page is wasted.
499 Some dedicated systems, such as software raid serving with
500 accelerated calculations, have shown significant increases.
502 If you configure a 64 bit kernel for 64k pages but the
503 processor does not support them, then the kernel will simulate
504 them with 4k pages, loading them on demand, but with the
505 reduced software overhead and larger internal fragmentation.
506 For the 32 bit kernel, a large page option will not be offered
507 unless it is supported by the configured processor.
509 If unsure, choose 4K_PAGES.
515 bool "16k page size" if 44x
518 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
519 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
521 config PPC_256K_PAGES
522 bool "256k page size" if 44x
523 depends on !STDBINUTILS
525 Make the page size 256k.
527 As the ELF standard only requires alignment to support page
528 sizes up to 64k, you will need to compile all of your user
529 space applications with a non-standard binutils settings
530 (see the STDBINUTILS description for details).
532 Say N unless you know what you are doing.
536 config FORCE_MAX_ZONEORDER
537 int "Maximum zone order"
538 range 9 64 if PPC64 && PPC_64K_PAGES
539 default "9" if PPC64 && PPC_64K_PAGES
540 range 13 64 if PPC64 && !PPC_64K_PAGES
541 default "13" if PPC64 && !PPC_64K_PAGES
542 range 9 64 if PPC32 && PPC_16K_PAGES
543 default "9" if PPC32 && PPC_16K_PAGES
544 range 7 64 if PPC32 && PPC_64K_PAGES
545 default "7" if PPC32 && PPC_64K_PAGES
546 range 5 64 if PPC32 && PPC_256K_PAGES
547 default "5" if PPC32 && PPC_256K_PAGES
551 The kernel memory allocator divides physically contiguous memory
552 blocks into "zones", where each zone is a power of two number of
553 pages. This option selects the largest power of two that the kernel
554 keeps in the memory allocator. If you need to allocate very large
555 blocks of physically contiguous memory, then you may need to
558 This config option is actually maximum order plus one. For example,
559 a value of 11 means that the largest free memory block is 2^10 pages.
561 The page size is not necessarily 4KB. For example, on 64-bit
562 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
563 this in mind when choosing a value for this option.
565 config PPC_SUBPAGE_PROT
566 bool "Support setting protections for 4k subpages"
567 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
569 This option adds support for a system call to allow user programs
570 to set access permissions (read/write, readonly, or no access)
571 on the 4k subpages of each 64k page.
574 bool "SMT (Hyperthreading) scheduler support"
575 depends on PPC64 && SMP
577 SMT scheduler support improves the CPU scheduler's decision making
578 when dealing with POWER5 cpus at a cost of slightly increased
579 overhead in some places. If unsure say N here.
581 config PPC_DENORMALISATION
582 bool "PowerPC denormalisation exception handling"
583 depends on PPC_BOOK3S_64
586 Add support for handling denormalisation of single precision
587 values. Useful for bare metal only. If unsure say Y here.
590 bool "Default bootloader kernel arguments"
593 string "Initial kernel command string"
594 depends on CMDLINE_BOOL
595 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
597 On some platforms, there is currently no way for the boot loader to
598 pass arguments to the kernel. For these platforms, you can supply
599 some command-line options at build time by entering them here. In
600 most cases you will need to specify the root device here.
603 string "Additional default image types"
605 List additional targets to be built by the bootwrapper here (separated
606 by spaces). This is useful for targets that depend of device tree
607 files in the .dts directory.
609 Targets in this list will be build as part of the default build
610 target, or when the user does a 'make zImage' or a
611 'make zImage.initrd'.
613 If unsure, leave blank
615 config ARCH_WANTS_FREEZER_CONTROL
619 source kernel/power/Kconfig
622 bool "Enable seccomp to safely compute untrusted bytecode"
626 This kernel feature is useful for number crunching applications
627 that may need to compute untrusted bytecode during their
628 execution. By using pipes or other transports made available to
629 the process as file descriptors supporting the read/write
630 syscalls, it's possible to isolate those applications in
631 their own address space using seccomp. Once seccomp is
632 enabled via /proc/<pid>/seccomp, it cannot be disabled
633 and the task is only allowed to execute a few safe syscalls
634 defined by each seccomp mode.
636 If unsure, say Y. Only embedded should say N here.
647 bool "Support for ISA-bus hardware"
648 depends on PPC_PREP || PPC_CHRP
651 Find out whether you have ISA slots on your motherboard. ISA is the
652 name of a bus system, i.e. the way the CPU talks to the other stuff
653 inside your box. If you have an Apple machine, say N here; if you
654 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
655 you have an embedded board, consult your board documentation.
661 config NEED_DMA_MAP_STATE
662 def_bool (PPC64 || NOT_COHERENT_CACHE)
664 config NEED_SG_DMA_LENGTH
667 config GENERIC_ISA_DMA
669 depends on ISA_DMA_API
672 config PPC_INDIRECT_PCI
675 default y if 40x || 44x
686 select HAVE_CAN_FLEXCAN if NET && CAN
691 select PPC_INDIRECT_PCI
697 depends on SUSPEND && (PPC_85xx || PPC_86xx)
699 Freescale MPC85xx/MPC86xx power management controller support
700 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
705 depends on SUSPEND && (44x || 40x)
707 PPC4xx Clock Power Management (CPM) support (suspend/resume).
708 It also enables support for two different idle states (idle-wait
715 bool "Freescale Local Bus support"
718 Enables reporting of errors from the Freescale local bus
719 controller. Also contains some common code used by
720 drivers for specific local bus peripherals.
728 depends on PPC_83xx || QUICC_ENGINE || CPM2
730 Freescale General-purpose Timers support
732 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
736 # Platforms that what PCI turned unconditionally just do select PCI
737 # in their config node. Platforms that want to choose at config
738 # time should select PPC_PCI_CHOICE
739 config PPC_PCI_CHOICE
743 bool "PCI support" if PPC_PCI_CHOICE
744 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
745 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
746 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
747 default PCI_QSPAN if !4xx && !CPM2 && 8xx
748 select ARCH_SUPPORTS_MSI
749 select GENERIC_PCI_IOMAP
751 Find out whether your system includes a PCI bus. PCI is the name of
752 a bus system, i.e. the way the CPU talks to the other stuff inside
753 your box. If you say Y here, the kernel will include drivers and
754 infrastructure code to support PCI bus devices.
764 depends on !4xx && !CPM2 && 8xx
767 Say Y here if you have a system based on a Motorola 8xx-series
768 embedded processor with a QSPAN PCI interface, otherwise say N.
772 depends on PCI && 8260
773 select PPC_INDIRECT_PCI
777 bool "Enable workaround for MPC826x erratum PCI 9"
778 depends on PCI_8260 && !8272
781 source "drivers/pci/pcie/Kconfig"
783 source "drivers/pci/Kconfig"
785 source "drivers/pcmcia/Kconfig"
787 source "drivers/pci/hotplug/Kconfig"
794 bool "RapidIO support"
795 depends on HAS_RAPIDIO || PCI
797 If you say Y here, the kernel will include drivers and
798 infrastructure code to support RapidIO interconnect devices.
801 bool "Freescale Embedded SRIO Controller support"
802 depends on RAPIDIO && HAS_RAPIDIO
805 Include support for RapidIO controller on Freescale embedded
806 processors (MPC8548, MPC8641, etc).
808 source "drivers/rapidio/Kconfig"
812 config NONSTATIC_KERNEL
816 menu "Advanced setup"
819 config ADVANCED_OPTIONS
820 bool "Prompt for advanced kernel configuration options"
822 This option will enable prompting for a variety of advanced kernel
823 configuration options. These options can cause the kernel to not
824 work if they are set incorrectly, but can be used to optimize certain
825 aspects of kernel memory management.
827 Unless you know what you are doing, say N here.
829 comment "Default settings for advanced configuration options are used"
830 depends on !ADVANCED_OPTIONS
832 config LOWMEM_SIZE_BOOL
833 bool "Set maximum low memory"
834 depends on ADVANCED_OPTIONS
836 This option allows you to set the maximum amount of memory which
837 will be used as "low memory", that is, memory which the kernel can
838 access directly, without having to set up a kernel virtual mapping.
839 This can be useful in optimizing the layout of kernel virtual
842 Say N here unless you know what you are doing.
845 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
848 config LOWMEM_CAM_NUM_BOOL
849 bool "Set number of CAMs to use to map low memory"
850 depends on ADVANCED_OPTIONS && FSL_BOOKE
852 This option allows you to set the maximum number of CAM slots that
853 will be used to map low memory. There are a limited number of slots
854 available and even more limited number that will fit in the L1 MMU.
855 However, using more entries will allow mapping more low memory. This
856 can be useful in optimizing the layout of kernel virtual memory.
858 Say N here unless you know what you are doing.
860 config LOWMEM_CAM_NUM
862 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
865 config DYNAMIC_MEMSTART
866 bool "Enable page aligned dynamic load address for kernel"
867 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
868 select NONSTATIC_KERNEL
870 This option enables the kernel to be loaded at any page aligned
871 physical address. The kernel creates a mapping from KERNELBASE to
872 the address where the kernel is loaded. The page size here implies
873 the TLB page size of the mapping for kernel on the particular platform.
874 Please refer to the init code for finding the TLB page size.
876 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
877 kernel image, where the only restriction is the page aligned kernel
878 load address. When this option is enabled, the compile time physical
879 address CONFIG_PHYSICAL_START is ignored.
881 This option is overridden by CONFIG_RELOCATABLE
884 bool "Build a relocatable kernel"
885 depends on ADVANCED_OPTIONS && FLATMEM && 44x
886 select NONSTATIC_KERNEL
888 This builds a kernel image that is capable of running at the
889 location the kernel is loaded at, without any alignment restrictions.
890 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
892 One use is for the kexec on panic case where the recovery kernel
893 must live at a different physical address than the primary
896 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
897 it has been loaded at and the compile time physical addresses
898 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
899 setting can still be useful to bootwrappers that need to know the
900 load address of the kernel (eg. u-boot/mkimage).
902 config RELOCATABLE_PPC32
904 depends on PPC32 && RELOCATABLE
906 config PAGE_OFFSET_BOOL
907 bool "Set custom page offset address"
908 depends on ADVANCED_OPTIONS
910 This option allows you to set the kernel virtual address at which
911 the kernel will map low memory. This can be useful in optimizing
912 the virtual memory layout of the system.
914 Say N here unless you know what you are doing.
917 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
920 config KERNEL_START_BOOL
921 bool "Set custom kernel base address"
922 depends on ADVANCED_OPTIONS
924 This option allows you to set the kernel virtual address at which
925 the kernel will be loaded. Normally this should match PAGE_OFFSET
926 however there are times (like kdump) that one might not want them
929 Say N here unless you know what you are doing.
932 hex "Virtual address of kernel base" if KERNEL_START_BOOL
933 default PAGE_OFFSET if PAGE_OFFSET_BOOL
934 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
937 config PHYSICAL_START_BOOL
938 bool "Set physical address where the kernel is loaded"
939 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
941 This gives the physical address where the kernel is loaded.
943 Say N here unless you know what you are doing.
945 config PHYSICAL_START
946 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
947 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
950 config PHYSICAL_ALIGN
952 default "0x04000000" if FSL_BOOKE
954 This value puts the alignment restrictions on physical address
955 where kernel is loaded and run from. Kernel is compiled for an
956 address which meets above alignment restriction.
958 config TASK_SIZE_BOOL
959 bool "Set custom user task size"
960 depends on ADVANCED_OPTIONS
962 This option allows you to set the amount of virtual address space
963 allocated to user tasks. This can be useful in optimizing the
964 virtual memory layout of the system.
966 Say N here unless you know what you are doing.
969 hex "Size of user task space" if TASK_SIZE_BOOL
970 default "0x80000000" if PPC_PREP || PPC_8xx
973 config CONSISTENT_SIZE_BOOL
974 bool "Set custom consistent memory pool size"
975 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
977 This option allows you to set the size of the
978 consistent memory pool. This pool of virtual memory
979 is used to make consistent memory allocations.
981 config CONSISTENT_SIZE
982 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
983 default "0x00200000" if NOT_COHERENT_CACHE
986 bool "Pinned Kernel TLBs (860 ONLY)"
987 depends on ADVANCED_OPTIONS && 8xx
992 bool "Build a relocatable kernel"
993 select NONSTATIC_KERNEL
995 This builds a kernel image that is capable of running anywhere
996 in the RMA (real memory area) at any 16k-aligned base address.
997 The kernel is linked as a position-independent executable (PIE)
998 and contains dynamic relocations which are processed early
999 in the bootup process.
1001 One use is for the kexec on panic case where the recovery kernel
1002 must live at a different physical address than the primary
1007 default "0xc000000000000000"
1010 default "0xc000000000000000"
1011 config PHYSICAL_START
1013 default "0x00000000"
1016 source "net/Kconfig"
1018 source "drivers/Kconfig"
1022 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1024 source "lib/Kconfig"
1026 source "arch/powerpc/Kconfig.debug"
1028 source "security/Kconfig"
1032 depends on COMPAT && KEYS
1035 source "crypto/Kconfig"
1042 config PPC_LIB_RHEAP
1045 source "arch/powerpc/kvm/Kconfig"