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 TRACE_IRQFLAGS_SUPPORT
54 config LOCKDEP_SUPPORT
58 config RWSEM_GENERIC_SPINLOCK
61 config RWSEM_XCHGADD_ALGORITHM
65 config GENERIC_LOCKBREAK
68 depends on SMP && PREEMPT
70 config ARCH_HAS_ILOG2_U32
74 config ARCH_HAS_ILOG2_U64
78 config GENERIC_HWEIGHT
82 config ARCH_HAS_DMA_SET_COHERENT_MASK
88 select ARCH_MIGHT_HAVE_PC_PARPORT
89 select ARCH_MIGHT_HAVE_PC_SERIO
91 select ARCH_HAS_ELF_RANDOMIZE
93 select OF_EARLY_FLATTREE
94 select OF_RESERVED_MEM
95 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
97 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
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 if !CPU_LITTLE_ENDIAN
107 select HAVE_ARCH_KGDB
108 select HAVE_KRETPROBES
109 select HAVE_ARCH_TRACEHOOK
111 select HAVE_MEMBLOCK_NODE_MAP
112 select HAVE_DMA_API_DEBUG
114 select HAVE_DEBUG_KMEMLEAK
115 select ARCH_HAS_SG_CHAIN
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 ARCH_WANT_IPC_PARSE_VERSION
124 select GENERIC_IRQ_SHOW
125 select GENERIC_IRQ_SHOW_LEVEL
126 select IRQ_FORCED_THREADING
127 select HAVE_RCU_TABLE_FREE if SMP
128 select HAVE_SYSCALL_TRACEPOINTS
130 select HAVE_ARCH_JUMP_LABEL
131 select ARCH_HAVE_NMI_SAFE_CMPXCHG
132 select ARCH_HAS_GCOV_PROFILE_ALL
133 select GENERIC_SMP_IDLE_THREAD
134 select GENERIC_CMOS_UPDATE
135 select GENERIC_TIME_VSYSCALL_OLD
136 select GENERIC_CLOCKEVENTS
137 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
138 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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
147 select HAVE_DEBUG_STACKOVERFLOW
148 select HAVE_IRQ_EXIT_ON_IRQ_STACK
149 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
150 select HAVE_ARCH_AUDITSYSCALL
151 select ARCH_SUPPORTS_ATOMIC_RMW
152 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
154 select HAVE_GENERIC_RCU_GUP
155 select HAVE_PERF_EVENTS_NMI if PPC64
157 select EDAC_ATOMIC_SCRUB
158 select ARCH_HAS_DMA_SET_COHERENT_MASK
159 select ARCH_HAS_DEVMEM_IS_ALLOWED
160 select HAVE_ARCH_SECCOMP_FILTER
161 select ARCH_HAS_UBSAN_SANITIZE_ALL
162 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
163 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
166 def_bool CPU_LITTLE_ENDIAN
179 select COMPAT_BINFMT_ELF
180 select ARCH_WANT_OLD_COMPAT_IPC
181 select COMPAT_OLD_SIGACTION
183 config SYSVIPC_COMPAT
185 depends on COMPAT && SYSVIPC
188 # All PPC32s use generic nvram driver through ppc_md
193 config SCHED_OMIT_FRAME_POINTER
197 config ARCH_MAY_HAVE_PC_FDC
201 config PPC_UDBG_16550
205 config GENERIC_TBSYNC
207 default y if PPC32 && SMP
219 config SYS_SUPPORTS_APM_EMULATION
220 default y if PMAC_APM_EMU
226 Used to allow a board to specify it wants an ePAPR compliant wrapper.
229 config DEFAULT_UIMAGE
232 Used to allow a board to specify it wants a uImage built by default
235 config ARCH_HIBERNATION_POSSIBLE
239 config ARCH_SUSPEND_POSSIBLE
241 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
242 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
245 config PPC_DCR_NATIVE
255 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
258 config PPC_OF_PLATFORM_PCI
261 depends on PPC64 # not supported on 32 bits yet
264 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
265 depends on PPC32 || PPC_STD_MMU_64
268 config ARCH_SUPPORTS_UPROBES
271 config PPC_ADV_DEBUG_REGS
273 depends on 40x || BOOKE
276 config PPC_ADV_DEBUG_IACS
278 depends on PPC_ADV_DEBUG_REGS
282 config PPC_ADV_DEBUG_DACS
284 depends on PPC_ADV_DEBUG_REGS
287 config PPC_ADV_DEBUG_DVCS
289 depends on PPC_ADV_DEBUG_REGS
293 config PPC_ADV_DEBUG_DAC_RANGE
295 depends on PPC_ADV_DEBUG_REGS && 44x
298 config PPC_EMULATE_SSTEP
300 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
306 config PGTABLE_LEVELS
309 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
312 source "init/Kconfig"
314 source "kernel/Kconfig.freezer"
316 source "arch/powerpc/sysdev/Kconfig"
317 source "arch/powerpc/platforms/Kconfig"
319 menu "Kernel options"
322 bool "High memory support"
325 source kernel/Kconfig.hz
326 source kernel/Kconfig.preempt
327 source "fs/Kconfig.binfmt"
329 config HUGETLB_PAGE_SIZE_VARIABLE
331 depends on HUGETLB_PAGE
334 config MATH_EMULATION
335 bool "Math emulation"
336 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
338 Some PowerPC chips designed for embedded applications do not have
339 a floating-point unit and therefore do not implement the
340 floating-point instructions in the PowerPC instruction set. If you
341 say Y here, the kernel will include code to emulate a floating-point
342 unit, which will allow programs that use floating-point
345 This is also useful to emulate missing (optional) instructions
346 such as fsqrt on cores that do have an FPU but do not implement
347 them (such as Freescale BookE).
350 prompt "Math emulation options"
351 default MATH_EMULATION_FULL
352 depends on MATH_EMULATION
354 config MATH_EMULATION_FULL
355 bool "Emulate all the floating point instructions"
357 Select this option will enable the kernel to support to emulate
358 all the floating point instructions. If your SoC doesn't have
359 a FPU, you should select this.
361 config MATH_EMULATION_HW_UNIMPLEMENTED
362 bool "Just emulate the FPU unimplemented instructions"
364 Select this if you know there does have a hardware FPU on your
365 SoC, but some floating point instructions are not implemented by that.
369 config PPC_TRANSACTIONAL_MEM
370 bool "Transactional Memory support for POWERPC"
371 depends on PPC_BOOK3S_64
377 Support user-mode Transactional Memory on POWERPC.
379 config DISABLE_MPROFILE_KERNEL
380 bool "Disable use of mprofile-kernel for kernel tracing"
381 depends on PPC64 && CPU_LITTLE_ENDIAN
384 Selecting this options disables use of the mprofile-kernel ABI for
385 kernel tracing. That will cause options such as live patching
386 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
389 If you have a toolchain which supports mprofile-kernel, then you can
390 enable this. Otherwise leave it disabled. If you're not sure, say
393 config MPROFILE_KERNEL
394 depends on PPC64 && CPU_LITTLE_ENDIAN
395 def_bool !DISABLE_MPROFILE_KERNEL
401 bool "SWIOTLB support"
405 Support for IO bounce buffering for systems without an IOMMU.
406 This allows us to DMA to the full physical address space on
407 platforms where the size of a physical address is larger
408 than the bus address. Not all platforms support this.
411 bool "Support for enabling/disabling CPUs"
412 depends on SMP && (PPC_PSERIES || \
413 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
415 Say Y here to be able to disable and re-enable individual
416 CPUs at runtime on SMP machines.
418 Say N if you are unsure.
420 config ARCH_CPU_PROBE_RELEASE
422 depends on HOTPLUG_CPU
424 config ARCH_ENABLE_MEMORY_HOTPLUG
427 config ARCH_HAS_WALK_MEMORY
430 config ARCH_ENABLE_MEMORY_HOTREMOVE
433 config PPC64_SUPPORTS_MEMORY_FAILURE
434 bool "Add support for memory hwpoison"
435 depends on PPC_BOOK3S_64
436 default "y" if PPC_POWERNV
437 select ARCH_SUPPORTS_MEMORY_FAILURE
440 bool "kexec system call"
441 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
444 kexec is a system call that implements the ability to shutdown your
445 current kernel, and to start another kernel. It is like a reboot
446 but it is independent of the system firmware. And like a reboot
447 you can start any kernel with it, not just Linux.
449 The name comes from the similarity to the exec system call.
451 It is an ongoing process to be certain the hardware in a machine
452 is properly shutdown, so do not be surprised if this code does not
453 initially work for you. As of this writing the exact hardware
454 interface is strongly in flux, so no good recommendation can be
458 bool "Build a kdump crash kernel"
459 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
460 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
462 Build a kernel suitable for use as a kdump capture kernel.
463 The same kernel binary can be used as production kernel and dump
467 bool "Firmware-assisted dump"
468 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
470 A robust mechanism to get reliable kernel crash dump with
471 assistance from firmware. This approach does not use kexec,
472 instead firmware assists in booting the kdump kernel
473 while preserving memory contents. Firmware-assisted dump
474 is meant to be a kdump replacement offering robustness and
475 speed not possible without system firmware assistance.
480 bool "Distribute interrupts on all CPUs by default"
483 This option gives the kernel permission to distribute IRQs across
484 multiple CPUs. Saying N here will route all IRQs to the first
485 CPU. Generally saying Y is safe, although some problems have been
486 reported with SMP Power Macintoshes with this option enabled.
491 default y if SMP && PPC_PSERIES
497 depends on NEED_MULTIPLE_NODES
499 config USE_PERCPU_NUMA_NODE_ID
503 config HAVE_MEMORYLESS_NODES
507 config ARCH_SELECT_MEMORY_MODEL
511 config ARCH_FLATMEM_ENABLE
513 depends on (PPC64 && !NUMA) || PPC32
515 config ARCH_SPARSEMEM_ENABLE
518 select SPARSEMEM_VMEMMAP_ENABLE
520 config ARCH_SPARSEMEM_DEFAULT
522 depends on (SMP && PPC_PSERIES) || PPC_PS3
524 config SYS_SUPPORTS_HUGETLBFS
529 config ARCH_MEMORY_PROBE
531 depends on MEMORY_HOTPLUG
533 # Some NUMA nodes have memory ranges that span
534 # other nodes. Even though a pfn is valid and
535 # between a node's start and end pfns, it may not
536 # reside on that node. See memmap_init_zone()
538 config NODES_SPAN_OTHER_NODES
540 depends on NEED_MULTIPLE_NODES
543 bool "Using standard binutils settings"
547 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
548 Note, that kernel will be able to run only those applications,
549 which had been compiled using binutils later than 2.17.50.0.3 with
550 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
551 the older binutils, you can patch them with a trivial patch, which
552 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
558 Select the kernel logical page size. Increasing the page size
559 will reduce software overhead at each page boundary, allow
560 hardware prefetch mechanisms to be more effective, and allow
561 larger dma transfers increasing IO efficiency and reducing
562 overhead. However the utilization of memory will increase.
563 For example, each cached file will using a multiple of the
564 page size to hold its contents and the difference between the
565 end of file and the end of page is wasted.
567 Some dedicated systems, such as software raid serving with
568 accelerated calculations, have shown significant increases.
570 If you configure a 64 bit kernel for 64k pages but the
571 processor does not support them, then the kernel will simulate
572 them with 4k pages, loading them on demand, but with the
573 reduced software overhead and larger internal fragmentation.
574 For the 32 bit kernel, a large page option will not be offered
575 unless it is supported by the configured processor.
577 If unsure, choose 4K_PAGES.
581 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
585 depends on 44x || PPC_8xx
589 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
590 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
592 config PPC_256K_PAGES
593 bool "256k page size"
594 depends on 44x && !STDBINUTILS
596 Make the page size 256k.
598 As the ELF standard only requires alignment to support page
599 sizes up to 64k, you will need to compile all of your user
600 space applications with a non-standard binutils settings
601 (see the STDBINUTILS description for details).
603 Say N unless you know what you are doing.
607 config FORCE_MAX_ZONEORDER
608 int "Maximum zone order"
609 range 9 64 if PPC64 && PPC_64K_PAGES
610 default "9" if PPC64 && PPC_64K_PAGES
611 range 13 64 if PPC64 && !PPC_64K_PAGES
612 default "13" if PPC64 && !PPC_64K_PAGES
613 range 9 64 if PPC32 && PPC_16K_PAGES
614 default "9" if PPC32 && PPC_16K_PAGES
615 range 7 64 if PPC32 && PPC_64K_PAGES
616 default "7" if PPC32 && PPC_64K_PAGES
617 range 5 64 if PPC32 && PPC_256K_PAGES
618 default "5" if PPC32 && PPC_256K_PAGES
622 The kernel memory allocator divides physically contiguous memory
623 blocks into "zones", where each zone is a power of two number of
624 pages. This option selects the largest power of two that the kernel
625 keeps in the memory allocator. If you need to allocate very large
626 blocks of physically contiguous memory, then you may need to
629 This config option is actually maximum order plus one. For example,
630 a value of 11 means that the largest free memory block is 2^10 pages.
632 The page size is not necessarily 4KB. For example, on 64-bit
633 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
634 this in mind when choosing a value for this option.
636 config PPC_SUBPAGE_PROT
637 bool "Support setting protections for 4k subpages"
638 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
640 This option adds support for a system call to allow user programs
641 to set access permissions (read/write, readonly, or no access)
642 on the 4k subpages of each 64k page.
644 config PPC_COPRO_BASE
649 bool "SMT (Hyperthreading) scheduler support"
650 depends on PPC64 && SMP
652 SMT scheduler support improves the CPU scheduler's decision making
653 when dealing with POWER5 cpus at a cost of slightly increased
654 overhead in some places. If unsure say N here.
656 config PPC_DENORMALISATION
657 bool "PowerPC denormalisation exception handling"
658 depends on PPC_BOOK3S_64
659 default "y" if PPC_POWERNV
661 Add support for handling denormalisation of single precision
662 values. Useful for bare metal only. If unsure say Y here.
665 bool "Default bootloader kernel arguments"
668 string "Initial kernel command string"
669 depends on CMDLINE_BOOL
670 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
672 On some platforms, there is currently no way for the boot loader to
673 pass arguments to the kernel. For these platforms, you can supply
674 some command-line options at build time by entering them here. In
675 most cases you will need to specify the root device here.
678 bool "Always use the default kernel command string"
679 depends on CMDLINE_BOOL
681 Always use the default kernel command string, even if the boot
682 loader passes other arguments to the kernel.
683 This is useful if you cannot or don't want to change the
684 command-line options your boot loader passes to the kernel.
687 string "Additional default image types"
689 List additional targets to be built by the bootwrapper here (separated
690 by spaces). This is useful for targets that depend of device tree
691 files in the .dts directory.
693 Targets in this list will be build as part of the default build
694 target, or when the user does a 'make zImage' or a
695 'make zImage.initrd'.
697 If unsure, leave blank
699 config ARCH_WANTS_FREEZER_CONTROL
703 source kernel/power/Kconfig
706 bool "Enable seccomp to safely compute untrusted bytecode"
710 This kernel feature is useful for number crunching applications
711 that may need to compute untrusted bytecode during their
712 execution. By using pipes or other transports made available to
713 the process as file descriptors supporting the read/write
714 syscalls, it's possible to isolate those applications in
715 their own address space using seccomp. Once seccomp is
716 enabled via /proc/<pid>/seccomp, it cannot be disabled
717 and the task is only allowed to execute a few safe syscalls
718 defined by each seccomp mode.
720 If unsure, say Y. Only embedded should say N here.
731 bool "Support for ISA-bus hardware"
735 Find out whether you have ISA slots on your motherboard. ISA is the
736 name of a bus system, i.e. the way the CPU talks to the other stuff
737 inside your box. If you have an Apple machine, say N here; if you
738 have an IBM RS/6000 or pSeries machine, say Y. If you have an
739 embedded board, consult your board documentation.
745 config NEED_DMA_MAP_STATE
746 def_bool (PPC64 || NOT_COHERENT_CACHE)
748 config NEED_SG_DMA_LENGTH
751 config GENERIC_ISA_DMA
753 depends on ISA_DMA_API
756 config PPC_INDIRECT_PCI
759 default y if 40x || 44x
773 select PPC_INDIRECT_PCI
779 depends on SUSPEND && (PPC_85xx || PPC_86xx)
781 Freescale MPC85xx/MPC86xx power management controller support
782 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
787 depends on SUSPEND && (44x || 40x)
789 PPC4xx Clock Power Management (CPM) support (suspend/resume).
790 It also enables support for two different idle states (idle-wait
797 bool "Freescale Local Bus support"
800 Enables reporting of errors from the Freescale local bus
801 controller. Also contains some common code used by
802 drivers for specific local bus peripherals.
806 depends on PPC_83xx || QUICC_ENGINE || CPM2
808 Freescale General-purpose Timers support
810 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
814 # Platforms that what PCI turned unconditionally just do select PCI
815 # in their config node. Platforms that want to choose at config
816 # time should select PPC_PCI_CHOICE
817 config PPC_PCI_CHOICE
821 bool "PCI support" if PPC_PCI_CHOICE
822 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
823 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
824 default PCI_QSPAN if !4xx && !CPM2 && 8xx
825 select GENERIC_PCI_IOMAP
827 Find out whether your system includes a PCI bus. PCI is the name of
828 a bus system, i.e. the way the CPU talks to the other stuff inside
829 your box. If you say Y here, the kernel will include drivers and
830 infrastructure code to support PCI bus devices.
840 depends on !4xx && !CPM2 && 8xx
843 Say Y here if you have a system based on a Motorola 8xx-series
844 embedded processor with a QSPAN PCI interface, otherwise say N.
848 depends on PCI && 8260
849 select PPC_INDIRECT_PCI
852 source "drivers/pci/Kconfig"
854 source "drivers/pcmcia/Kconfig"
861 tristate "RapidIO support"
862 depends on HAS_RAPIDIO || PCI
864 If you say Y here, the kernel will include drivers and
865 infrastructure code to support RapidIO interconnect devices.
868 bool "Freescale Embedded SRIO Controller support"
869 depends on RAPIDIO = y && HAS_RAPIDIO
872 Include support for RapidIO controller on Freescale embedded
873 processors (MPC8548, MPC8641, etc).
875 source "drivers/rapidio/Kconfig"
879 config NONSTATIC_KERNEL
883 menu "Advanced setup"
886 config ADVANCED_OPTIONS
887 bool "Prompt for advanced kernel configuration options"
889 This option will enable prompting for a variety of advanced kernel
890 configuration options. These options can cause the kernel to not
891 work if they are set incorrectly, but can be used to optimize certain
892 aspects of kernel memory management.
894 Unless you know what you are doing, say N here.
896 comment "Default settings for advanced configuration options are used"
897 depends on !ADVANCED_OPTIONS
899 config LOWMEM_SIZE_BOOL
900 bool "Set maximum low memory"
901 depends on ADVANCED_OPTIONS
903 This option allows you to set the maximum amount of memory which
904 will be used as "low memory", that is, memory which the kernel can
905 access directly, without having to set up a kernel virtual mapping.
906 This can be useful in optimizing the layout of kernel virtual
909 Say N here unless you know what you are doing.
912 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
915 config LOWMEM_CAM_NUM_BOOL
916 bool "Set number of CAMs to use to map low memory"
917 depends on ADVANCED_OPTIONS && FSL_BOOKE
919 This option allows you to set the maximum number of CAM slots that
920 will be used to map low memory. There are a limited number of slots
921 available and even more limited number that will fit in the L1 MMU.
922 However, using more entries will allow mapping more low memory. This
923 can be useful in optimizing the layout of kernel virtual memory.
925 Say N here unless you know what you are doing.
927 config LOWMEM_CAM_NUM
929 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
932 config DYNAMIC_MEMSTART
933 bool "Enable page aligned dynamic load address for kernel"
934 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
935 select NONSTATIC_KERNEL
937 This option enables the kernel to be loaded at any page aligned
938 physical address. The kernel creates a mapping from KERNELBASE to
939 the address where the kernel is loaded. The page size here implies
940 the TLB page size of the mapping for kernel on the particular platform.
941 Please refer to the init code for finding the TLB page size.
943 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
944 kernel image, where the only restriction is the page aligned kernel
945 load address. When this option is enabled, the compile time physical
946 address CONFIG_PHYSICAL_START is ignored.
948 This option is overridden by CONFIG_RELOCATABLE
951 bool "Build a relocatable kernel"
952 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
953 select NONSTATIC_KERNEL
955 This builds a kernel image that is capable of running at the
956 location the kernel is loaded at, without any alignment restrictions.
957 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
959 One use is for the kexec on panic case where the recovery kernel
960 must live at a different physical address than the primary
963 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
964 it has been loaded at and the compile time physical addresses
965 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
966 setting can still be useful to bootwrappers that need to know the
967 load address of the kernel (eg. u-boot/mkimage).
969 config RELOCATABLE_PPC32
971 depends on PPC32 && RELOCATABLE
973 config PAGE_OFFSET_BOOL
974 bool "Set custom page offset address"
975 depends on ADVANCED_OPTIONS
977 This option allows you to set the kernel virtual address at which
978 the kernel will map low memory. This can be useful in optimizing
979 the virtual memory layout of the system.
981 Say N here unless you know what you are doing.
984 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
987 config KERNEL_START_BOOL
988 bool "Set custom kernel base address"
989 depends on ADVANCED_OPTIONS
991 This option allows you to set the kernel virtual address at which
992 the kernel will be loaded. Normally this should match PAGE_OFFSET
993 however there are times (like kdump) that one might not want them
996 Say N here unless you know what you are doing.
999 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1000 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1001 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1002 default "0xc0000000"
1004 config PHYSICAL_START_BOOL
1005 bool "Set physical address where the kernel is loaded"
1006 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1008 This gives the physical address where the kernel is loaded.
1010 Say N here unless you know what you are doing.
1012 config PHYSICAL_START
1013 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1014 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1015 default "0x00000000"
1017 config PHYSICAL_ALIGN
1019 default "0x04000000" if FSL_BOOKE
1021 This value puts the alignment restrictions on physical address
1022 where kernel is loaded and run from. Kernel is compiled for an
1023 address which meets above alignment restriction.
1025 config TASK_SIZE_BOOL
1026 bool "Set custom user task size"
1027 depends on ADVANCED_OPTIONS
1029 This option allows you to set the amount of virtual address space
1030 allocated to user tasks. This can be useful in optimizing the
1031 virtual memory layout of the system.
1033 Say N here unless you know what you are doing.
1036 hex "Size of user task space" if TASK_SIZE_BOOL
1037 default "0x80000000" if PPC_8xx
1038 default "0xc0000000"
1040 config CONSISTENT_SIZE_BOOL
1041 bool "Set custom consistent memory pool size"
1042 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1044 This option allows you to set the size of the
1045 consistent memory pool. This pool of virtual memory
1046 is used to make consistent memory allocations.
1048 config CONSISTENT_SIZE
1049 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1050 default "0x00200000" if NOT_COHERENT_CACHE
1053 bool "Pinned Kernel TLBs (860 ONLY)"
1054 depends on ADVANCED_OPTIONS && 8xx
1059 bool "Build a relocatable kernel"
1060 depends on !COMPILE_TEST
1061 select NONSTATIC_KERNEL
1063 This builds a kernel image that is capable of running anywhere
1064 in the RMA (real memory area) at any 16k-aligned base address.
1065 The kernel is linked as a position-independent executable (PIE)
1066 and contains dynamic relocations which are processed early
1067 in the bootup process.
1069 One use is for the kexec on panic case where the recovery kernel
1070 must live at a different physical address than the primary
1073 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1076 default "0xc000000000000000"
1079 default "0xc000000000000000"
1080 config PHYSICAL_START
1082 default "0x00000000"
1088 source "net/Kconfig"
1090 source "drivers/Kconfig"
1094 source "lib/Kconfig"
1096 source "arch/powerpc/Kconfig.debug"
1098 source "security/Kconfig"
1102 depends on COMPAT && KEYS
1105 source "crypto/Kconfig"
1107 config PPC_LIB_RHEAP
1110 source "arch/powerpc/kvm/Kconfig"
1112 source "kernel/livepatch/Kconfig"