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
95 select OF_EARLY_FLATTREE
96 select HAVE_FTRACE_MCOUNT_RECORD
97 select HAVE_DYNAMIC_FTRACE
98 select HAVE_FUNCTION_TRACER
99 select HAVE_FUNCTION_GRAPH_TRACER
100 select SYSCTL_EXCEPTION_TRACE
101 select ARCH_WANT_OPTIONAL_GPIOLIB
102 select VIRT_TO_BUS if !PPC64
104 select HAVE_IOREMAP_PROT
105 select HAVE_EFFICIENT_UNALIGNED_ACCESS
107 select HAVE_ARCH_KGDB
108 select HAVE_KRETPROBES
109 select HAVE_ARCH_TRACEHOOK
111 select HAVE_MEMBLOCK_NODE_MAP
112 select HAVE_DMA_ATTRS
113 select HAVE_DMA_API_DEBUG
114 select USE_GENERIC_SMP_HELPERS if SMP
116 select HAVE_DEBUG_KMEMLEAK
117 select HAVE_SYSCALL_WRAPPERS if PPC64
118 select GENERIC_ATOMIC64 if PPC32
119 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
120 select HAVE_PERF_EVENTS
121 select HAVE_REGS_AND_STACK_ACCESS_API
122 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
123 select HAVE_GENERIC_HARDIRQS
124 select ARCH_WANT_IPC_PARSE_VERSION
127 select GENERIC_IRQ_SHOW
128 select GENERIC_IRQ_SHOW_LEVEL
129 select IRQ_FORCED_THREADING
130 select HAVE_RCU_TABLE_FREE if SMP
131 select HAVE_SYSCALL_TRACEPOINTS
132 select HAVE_BPF_JIT if PPC64
133 select HAVE_ARCH_JUMP_LABEL
134 select ARCH_HAVE_NMI_SAFE_CMPXCHG
135 select GENERIC_SMP_IDLE_THREAD
136 select GENERIC_CMOS_UPDATE
137 select GENERIC_TIME_VSYSCALL_OLD
138 select GENERIC_CLOCKEVENTS
139 select GENERIC_STRNCPY_FROM_USER
140 select GENERIC_STRNLEN_USER
141 select HAVE_MOD_ARCH_SPECIFIC
142 select MODULES_USE_ELF_RELA
143 select CLONE_BACKWARDS
144 select ARCH_USE_BUILTIN_BSWAP
145 select OLD_SIGSUSPEND
146 select OLD_SIGACTION if PPC32
155 select COMPAT_BINFMT_ELF
156 select ARCH_WANT_OLD_COMPAT_IPC
157 select COMPAT_OLD_SIGACTION
159 config SYSVIPC_COMPAT
161 depends on COMPAT && SYSVIPC
164 # All PPC32s use generic nvram driver through ppc_md
169 config SCHED_OMIT_FRAME_POINTER
173 config ARCH_MAY_HAVE_PC_FDC
175 default !PPC_PSERIES || PCI
180 config PPC_UDBG_16550
184 config GENERIC_TBSYNC
186 default y if PPC32 && SMP
198 config SYS_SUPPORTS_APM_EMULATION
199 default y if PMAC_APM_EMU
205 Used to allow a board to specify it wants an ePAPR compliant wrapper.
208 config DEFAULT_UIMAGE
211 Used to allow a board to specify it wants a uImage built by default
217 config ARCH_HIBERNATION_POSSIBLE
221 config ARCH_SUSPEND_POSSIBLE
223 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
224 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
227 config PPC_DCR_NATIVE
237 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
240 config PPC_OF_PLATFORM_PCI
243 depends on PPC64 # not supported on 32 bits yet
246 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
249 config ARCH_SUPPORTS_UPROBES
252 config PPC_ADV_DEBUG_REGS
254 depends on 40x || BOOKE
257 config PPC_ADV_DEBUG_IACS
259 depends on PPC_ADV_DEBUG_REGS
263 config PPC_ADV_DEBUG_DACS
265 depends on PPC_ADV_DEBUG_REGS
268 config PPC_ADV_DEBUG_DVCS
270 depends on PPC_ADV_DEBUG_REGS
274 config PPC_ADV_DEBUG_DAC_RANGE
276 depends on PPC_ADV_DEBUG_REGS && 44x
279 config PPC_EMULATE_SSTEP
281 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
283 source "init/Kconfig"
285 source "kernel/Kconfig.freezer"
287 source "arch/powerpc/sysdev/Kconfig"
288 source "arch/powerpc/platforms/Kconfig"
290 menu "Kernel options"
293 bool "High memory support"
296 source kernel/Kconfig.hz
297 source kernel/Kconfig.preempt
298 source "fs/Kconfig.binfmt"
300 config HUGETLB_PAGE_SIZE_VARIABLE
302 depends on HUGETLB_PAGE
305 config MATH_EMULATION
306 bool "Math emulation"
307 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
309 Some PowerPC chips designed for embedded applications do not have
310 a floating-point unit and therefore do not implement the
311 floating-point instructions in the PowerPC instruction set. If you
312 say Y here, the kernel will include code to emulate a floating-point
313 unit, which will allow programs that use floating-point
316 config PPC_TRANSACTIONAL_MEM
317 bool "Transactional Memory support for POWERPC"
318 depends on PPC_BOOK3S_64
322 Support user-mode Transactional Memory on POWERPC.
324 config 8XX_MINIMAL_FPEMU
325 bool "Minimal math emulation for 8xx"
326 depends on 8xx && !MATH_EMULATION
328 Older arch/ppc kernels still emulated a few floating point
329 instructions such as load and store, even when full math
330 emulation is disabled. Say "Y" here if you want to preserve
333 It is recommended that you build a soft-float userspace instead.
339 bool "SWIOTLB support"
343 Support for IO bounce buffering for systems without an IOMMU.
344 This allows us to DMA to the full physical address space on
345 platforms where the size of a physical address is larger
346 than the bus address. Not all platforms support this.
349 bool "Support for enabling/disabling CPUs"
350 depends on SMP && HOTPLUG && (PPC_PSERIES || \
351 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
353 Say Y here to be able to disable and re-enable individual
354 CPUs at runtime on SMP machines.
356 Say N if you are unsure.
358 config ARCH_CPU_PROBE_RELEASE
360 depends on HOTPLUG_CPU
362 config ARCH_ENABLE_MEMORY_HOTPLUG
365 config ARCH_HAS_WALK_MEMORY
368 config ARCH_ENABLE_MEMORY_HOTREMOVE
372 bool "kexec system call"
373 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
375 kexec is a system call that implements the ability to shutdown your
376 current kernel, and to start another kernel. It is like a reboot
377 but it is independent of the system firmware. And like a reboot
378 you can start any kernel with it, not just Linux.
380 The name comes from the similarity to the exec system call.
382 It is an ongoing process to be certain the hardware in a machine
383 is properly shutdown, so do not be surprised if this code does not
384 initially work for you. It may help to enable device hotplugging
385 support. As of this writing the exact hardware interface is
386 strongly in flux, so no good recommendation can be made.
389 bool "Build a kdump crash kernel"
390 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
391 select RELOCATABLE if PPC64 || 44x
392 select DYNAMIC_MEMSTART if FSL_BOOKE
394 Build a kernel suitable for use as a kdump capture kernel.
395 The same kernel binary can be used as production kernel and dump
399 bool "Firmware-assisted dump"
400 depends on PPC64 && PPC_RTAS && CRASH_DUMP
402 A robust mechanism to get reliable kernel crash dump with
403 assistance from firmware. This approach does not use kexec,
404 instead firmware assists in booting the kdump kernel
405 while preserving memory contents. Firmware-assisted dump
406 is meant to be a kdump replacement offering robustness and
407 speed not possible without system firmware assistance.
412 bool "Distribute interrupts on all CPUs by default"
413 depends on SMP && !MV64360
415 This option gives the kernel permission to distribute IRQs across
416 multiple CPUs. Saying N here will route all IRQs to the first
417 CPU. Generally saying Y is safe, although some problems have been
418 reported with SMP Power Macintoshes with this option enabled.
423 default y if SMP && PPC_PSERIES
429 depends on NEED_MULTIPLE_NODES
431 config MAX_ACTIVE_REGIONS
433 default "256" if PPC64
436 config ARCH_SELECT_MEMORY_MODEL
440 config ARCH_FLATMEM_ENABLE
442 depends on (PPC64 && !NUMA) || PPC32
444 config ARCH_SPARSEMEM_ENABLE
447 select SPARSEMEM_VMEMMAP_ENABLE
449 config ARCH_SPARSEMEM_DEFAULT
451 depends on (SMP && PPC_PSERIES) || PPC_PS3
453 config SYS_SUPPORTS_HUGETLBFS
458 config ARCH_MEMORY_PROBE
460 depends on MEMORY_HOTPLUG
462 # Some NUMA nodes have memory ranges that span
463 # other nodes. Even though a pfn is valid and
464 # between a node's start and end pfns, it may not
465 # reside on that node. See memmap_init_zone()
467 config NODES_SPAN_OTHER_NODES
469 depends on NEED_MULTIPLE_NODES
471 config PPC_HAS_HASH_64K
477 bool "Using standard binutils settings"
481 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
482 Note, that kernel will be able to run only those applications,
483 which had been compiled using binutils later than 2.17.50.0.3 with
484 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
485 the older binutils, you can patch them with a trivial patch, which
486 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
492 Select the kernel logical page size. Increasing the page size
493 will reduce software overhead at each page boundary, allow
494 hardware prefetch mechanisms to be more effective, and allow
495 larger dma transfers increasing IO efficiency and reducing
496 overhead. However the utilization of memory will increase.
497 For example, each cached file will using a multiple of the
498 page size to hold its contents and the difference between the
499 end of file and the end of page is wasted.
501 Some dedicated systems, such as software raid serving with
502 accelerated calculations, have shown significant increases.
504 If you configure a 64 bit kernel for 64k pages but the
505 processor does not support them, then the kernel will simulate
506 them with 4k pages, loading them on demand, but with the
507 reduced software overhead and larger internal fragmentation.
508 For the 32 bit kernel, a large page option will not be offered
509 unless it is supported by the configured processor.
511 If unsure, choose 4K_PAGES.
517 bool "16k page size" if 44x
520 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
521 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
523 config PPC_256K_PAGES
524 bool "256k page size" if 44x
525 depends on !STDBINUTILS
527 Make the page size 256k.
529 As the ELF standard only requires alignment to support page
530 sizes up to 64k, you will need to compile all of your user
531 space applications with a non-standard binutils settings
532 (see the STDBINUTILS description for details).
534 Say N unless you know what you are doing.
538 config FORCE_MAX_ZONEORDER
539 int "Maximum zone order"
540 range 9 64 if PPC64 && PPC_64K_PAGES
541 default "9" if PPC64 && PPC_64K_PAGES
542 range 13 64 if PPC64 && !PPC_64K_PAGES
543 default "13" if PPC64 && !PPC_64K_PAGES
544 range 9 64 if PPC32 && PPC_16K_PAGES
545 default "9" if PPC32 && PPC_16K_PAGES
546 range 7 64 if PPC32 && PPC_64K_PAGES
547 default "7" if PPC32 && PPC_64K_PAGES
548 range 5 64 if PPC32 && PPC_256K_PAGES
549 default "5" if PPC32 && PPC_256K_PAGES
553 The kernel memory allocator divides physically contiguous memory
554 blocks into "zones", where each zone is a power of two number of
555 pages. This option selects the largest power of two that the kernel
556 keeps in the memory allocator. If you need to allocate very large
557 blocks of physically contiguous memory, then you may need to
560 This config option is actually maximum order plus one. For example,
561 a value of 11 means that the largest free memory block is 2^10 pages.
563 The page size is not necessarily 4KB. For example, on 64-bit
564 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
565 this in mind when choosing a value for this option.
567 config PPC_SUBPAGE_PROT
568 bool "Support setting protections for 4k subpages"
569 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
571 This option adds support for a system call to allow user programs
572 to set access permissions (read/write, readonly, or no access)
573 on the 4k subpages of each 64k page.
576 bool "SMT (Hyperthreading) scheduler support"
577 depends on PPC64 && SMP
579 SMT scheduler support improves the CPU scheduler's decision making
580 when dealing with POWER5 cpus at a cost of slightly increased
581 overhead in some places. If unsure say N here.
583 config PPC_DENORMALISATION
584 bool "PowerPC denormalisation exception handling"
585 depends on PPC_BOOK3S_64
588 Add support for handling denormalisation of single precision
589 values. Useful for bare metal only. If unsure say Y here.
592 bool "Default bootloader kernel arguments"
595 string "Initial kernel command string"
596 depends on CMDLINE_BOOL
597 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
599 On some platforms, there is currently no way for the boot loader to
600 pass arguments to the kernel. For these platforms, you can supply
601 some command-line options at build time by entering them here. In
602 most cases you will need to specify the root device here.
605 string "Additional default image types"
607 List additional targets to be built by the bootwrapper here (separated
608 by spaces). This is useful for targets that depend of device tree
609 files in the .dts directory.
611 Targets in this list will be build as part of the default build
612 target, or when the user does a 'make zImage' or a
613 'make zImage.initrd'.
615 If unsure, leave blank
617 config ARCH_WANTS_FREEZER_CONTROL
621 source kernel/power/Kconfig
624 bool "Enable seccomp to safely compute untrusted bytecode"
628 This kernel feature is useful for number crunching applications
629 that may need to compute untrusted bytecode during their
630 execution. By using pipes or other transports made available to
631 the process as file descriptors supporting the read/write
632 syscalls, it's possible to isolate those applications in
633 their own address space using seccomp. Once seccomp is
634 enabled via /proc/<pid>/seccomp, it cannot be disabled
635 and the task is only allowed to execute a few safe syscalls
636 defined by each seccomp mode.
638 If unsure, say Y. Only embedded should say N here.
649 bool "Support for ISA-bus hardware"
650 depends on PPC_PREP || PPC_CHRP
653 Find out whether you have ISA slots on your motherboard. ISA is the
654 name of a bus system, i.e. the way the CPU talks to the other stuff
655 inside your box. If you have an Apple machine, say N here; if you
656 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
657 you have an embedded board, consult your board documentation.
663 config NEED_DMA_MAP_STATE
664 def_bool (PPC64 || NOT_COHERENT_CACHE)
666 config NEED_SG_DMA_LENGTH
669 config GENERIC_ISA_DMA
671 depends on ISA_DMA_API
674 config PPC_INDIRECT_PCI
677 default y if 40x || 44x
688 select HAVE_CAN_FLEXCAN if NET && CAN
693 select PPC_INDIRECT_PCI
699 depends on SUSPEND && (PPC_85xx || PPC_86xx)
701 Freescale MPC85xx/MPC86xx power management controller support
702 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
707 depends on SUSPEND && (44x || 40x)
709 PPC4xx Clock Power Management (CPM) support (suspend/resume).
710 It also enables support for two different idle states (idle-wait
717 bool "Freescale Local Bus support"
720 Enables reporting of errors from the Freescale local bus
721 controller. Also contains some common code used by
722 drivers for specific local bus peripherals.
730 depends on PPC_83xx || QUICC_ENGINE || CPM2
732 Freescale General-purpose Timers support
734 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
738 # Platforms that what PCI turned unconditionally just do select PCI
739 # in their config node. Platforms that want to choose at config
740 # time should select PPC_PCI_CHOICE
741 config PPC_PCI_CHOICE
745 bool "PCI support" if PPC_PCI_CHOICE
746 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
747 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
748 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
749 default PCI_QSPAN if !4xx && !CPM2 && 8xx
750 select ARCH_SUPPORTS_MSI
751 select GENERIC_PCI_IOMAP
753 Find out whether your system includes a PCI bus. PCI is the name of
754 a bus system, i.e. the way the CPU talks to the other stuff inside
755 your box. If you say Y here, the kernel will include drivers and
756 infrastructure code to support PCI bus devices.
766 depends on !4xx && !CPM2 && 8xx
769 Say Y here if you have a system based on a Motorola 8xx-series
770 embedded processor with a QSPAN PCI interface, otherwise say N.
774 depends on PCI && 8260
775 select PPC_INDIRECT_PCI
779 bool "Enable workaround for MPC826x erratum PCI 9"
780 depends on PCI_8260 && !8272
783 source "drivers/pci/pcie/Kconfig"
785 source "drivers/pci/Kconfig"
787 source "drivers/pcmcia/Kconfig"
789 source "drivers/pci/hotplug/Kconfig"
796 bool "RapidIO support"
797 depends on HAS_RAPIDIO || PCI
799 If you say Y here, the kernel will include drivers and
800 infrastructure code to support RapidIO interconnect devices.
803 bool "Freescale Embedded SRIO Controller support"
804 depends on RAPIDIO && HAS_RAPIDIO
807 Include support for RapidIO controller on Freescale embedded
808 processors (MPC8548, MPC8641, etc).
810 source "drivers/rapidio/Kconfig"
814 config NONSTATIC_KERNEL
818 menu "Advanced setup"
821 config ADVANCED_OPTIONS
822 bool "Prompt for advanced kernel configuration options"
824 This option will enable prompting for a variety of advanced kernel
825 configuration options. These options can cause the kernel to not
826 work if they are set incorrectly, but can be used to optimize certain
827 aspects of kernel memory management.
829 Unless you know what you are doing, say N here.
831 comment "Default settings for advanced configuration options are used"
832 depends on !ADVANCED_OPTIONS
834 config LOWMEM_SIZE_BOOL
835 bool "Set maximum low memory"
836 depends on ADVANCED_OPTIONS
838 This option allows you to set the maximum amount of memory which
839 will be used as "low memory", that is, memory which the kernel can
840 access directly, without having to set up a kernel virtual mapping.
841 This can be useful in optimizing the layout of kernel virtual
844 Say N here unless you know what you are doing.
847 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
850 config LOWMEM_CAM_NUM_BOOL
851 bool "Set number of CAMs to use to map low memory"
852 depends on ADVANCED_OPTIONS && FSL_BOOKE
854 This option allows you to set the maximum number of CAM slots that
855 will be used to map low memory. There are a limited number of slots
856 available and even more limited number that will fit in the L1 MMU.
857 However, using more entries will allow mapping more low memory. This
858 can be useful in optimizing the layout of kernel virtual memory.
860 Say N here unless you know what you are doing.
862 config LOWMEM_CAM_NUM
864 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
867 config DYNAMIC_MEMSTART
868 bool "Enable page aligned dynamic load address for kernel"
869 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
870 select NONSTATIC_KERNEL
872 This option enables the kernel to be loaded at any page aligned
873 physical address. The kernel creates a mapping from KERNELBASE to
874 the address where the kernel is loaded. The page size here implies
875 the TLB page size of the mapping for kernel on the particular platform.
876 Please refer to the init code for finding the TLB page size.
878 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
879 kernel image, where the only restriction is the page aligned kernel
880 load address. When this option is enabled, the compile time physical
881 address CONFIG_PHYSICAL_START is ignored.
883 This option is overridden by CONFIG_RELOCATABLE
886 bool "Build a relocatable kernel"
887 depends on ADVANCED_OPTIONS && FLATMEM && 44x
888 select NONSTATIC_KERNEL
890 This builds a kernel image that is capable of running at the
891 location the kernel is loaded at, without any alignment restrictions.
892 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
894 One use is for the kexec on panic case where the recovery kernel
895 must live at a different physical address than the primary
898 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
899 it has been loaded at and the compile time physical addresses
900 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
901 setting can still be useful to bootwrappers that need to know the
902 load address of the kernel (eg. u-boot/mkimage).
904 config RELOCATABLE_PPC32
906 depends on PPC32 && RELOCATABLE
908 config PAGE_OFFSET_BOOL
909 bool "Set custom page offset address"
910 depends on ADVANCED_OPTIONS
912 This option allows you to set the kernel virtual address at which
913 the kernel will map low memory. This can be useful in optimizing
914 the virtual memory layout of the system.
916 Say N here unless you know what you are doing.
919 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
922 config KERNEL_START_BOOL
923 bool "Set custom kernel base address"
924 depends on ADVANCED_OPTIONS
926 This option allows you to set the kernel virtual address at which
927 the kernel will be loaded. Normally this should match PAGE_OFFSET
928 however there are times (like kdump) that one might not want them
931 Say N here unless you know what you are doing.
934 hex "Virtual address of kernel base" if KERNEL_START_BOOL
935 default PAGE_OFFSET if PAGE_OFFSET_BOOL
936 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
939 config PHYSICAL_START_BOOL
940 bool "Set physical address where the kernel is loaded"
941 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
943 This gives the physical address where the kernel is loaded.
945 Say N here unless you know what you are doing.
947 config PHYSICAL_START
948 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
949 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
952 config PHYSICAL_ALIGN
954 default "0x04000000" if FSL_BOOKE
956 This value puts the alignment restrictions on physical address
957 where kernel is loaded and run from. Kernel is compiled for an
958 address which meets above alignment restriction.
960 config TASK_SIZE_BOOL
961 bool "Set custom user task size"
962 depends on ADVANCED_OPTIONS
964 This option allows you to set the amount of virtual address space
965 allocated to user tasks. This can be useful in optimizing the
966 virtual memory layout of the system.
968 Say N here unless you know what you are doing.
971 hex "Size of user task space" if TASK_SIZE_BOOL
972 default "0x80000000" if PPC_PREP || PPC_8xx
975 config CONSISTENT_SIZE_BOOL
976 bool "Set custom consistent memory pool size"
977 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
979 This option allows you to set the size of the
980 consistent memory pool. This pool of virtual memory
981 is used to make consistent memory allocations.
983 config CONSISTENT_SIZE
984 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
985 default "0x00200000" if NOT_COHERENT_CACHE
988 bool "Pinned Kernel TLBs (860 ONLY)"
989 depends on ADVANCED_OPTIONS && 8xx
994 bool "Build a relocatable kernel"
995 select NONSTATIC_KERNEL
997 This builds a kernel image that is capable of running anywhere
998 in the RMA (real memory area) at any 16k-aligned base address.
999 The kernel is linked as a position-independent executable (PIE)
1000 and contains dynamic relocations which are processed early
1001 in the bootup process.
1003 One use is for the kexec on panic case where the recovery kernel
1004 must live at a different physical address than the primary
1009 default "0xc000000000000000"
1012 default "0xc000000000000000"
1013 config PHYSICAL_START
1015 default "0x00000000"
1018 source "net/Kconfig"
1020 source "drivers/Kconfig"
1024 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1026 source "lib/Kconfig"
1028 source "arch/powerpc/Kconfig.debug"
1030 source "security/Kconfig"
1034 depends on COMPAT && KEYS
1037 source "crypto/Kconfig"
1044 config PPC_LIB_RHEAP
1047 source "arch/powerpc/kvm/Kconfig"