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_PERF_REGS
120 select HAVE_PERF_USER_STACK_DUMP
121 select HAVE_REGS_AND_STACK_ACCESS_API
122 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
123 select ARCH_WANT_IPC_PARSE_VERSION
126 select GENERIC_IRQ_SHOW
127 select GENERIC_IRQ_SHOW_LEVEL
128 select IRQ_FORCED_THREADING
129 select HAVE_RCU_TABLE_FREE if SMP
130 select HAVE_SYSCALL_TRACEPOINTS
132 select HAVE_ARCH_JUMP_LABEL
133 select ARCH_HAVE_NMI_SAFE_CMPXCHG
134 select ARCH_HAS_GCOV_PROFILE_ALL
135 select GENERIC_SMP_IDLE_THREAD
136 select GENERIC_CMOS_UPDATE
137 select GENERIC_TIME_VSYSCALL_OLD
138 select GENERIC_CLOCKEVENTS
139 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
140 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
141 select GENERIC_STRNCPY_FROM_USER
142 select GENERIC_STRNLEN_USER
143 select HAVE_MOD_ARCH_SPECIFIC
144 select MODULES_USE_ELF_RELA
145 select CLONE_BACKWARDS
146 select ARCH_USE_BUILTIN_BSWAP
147 select OLD_SIGSUSPEND
148 select OLD_SIGACTION if PPC32
149 select HAVE_DEBUG_STACKOVERFLOW
150 select HAVE_IRQ_EXIT_ON_IRQ_STACK
151 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
152 select HAVE_ARCH_AUDITSYSCALL
153 select ARCH_SUPPORTS_ATOMIC_RMW
154 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
156 select HAVE_GENERIC_RCU_GUP
157 select HAVE_PERF_EVENTS_NMI if PPC64
159 select EDAC_ATOMIC_SCRUB
160 select ARCH_HAS_DMA_SET_COHERENT_MASK
161 select ARCH_HAS_DEVMEM_IS_ALLOWED
162 select HAVE_ARCH_SECCOMP_FILTER
163 select ARCH_HAS_UBSAN_SANITIZE_ALL
164 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
165 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
168 def_bool CPU_LITTLE_ENDIAN
181 select COMPAT_BINFMT_ELF
182 select ARCH_WANT_OLD_COMPAT_IPC
183 select COMPAT_OLD_SIGACTION
185 config SYSVIPC_COMPAT
187 depends on COMPAT && SYSVIPC
190 # All PPC32s use generic nvram driver through ppc_md
195 config SCHED_OMIT_FRAME_POINTER
199 config ARCH_MAY_HAVE_PC_FDC
203 config PPC_UDBG_16550
207 config GENERIC_TBSYNC
209 default y if PPC32 && SMP
221 config SYS_SUPPORTS_APM_EMULATION
222 default y if PMAC_APM_EMU
228 Used to allow a board to specify it wants an ePAPR compliant wrapper.
231 config DEFAULT_UIMAGE
234 Used to allow a board to specify it wants a uImage built by default
237 config ARCH_HIBERNATION_POSSIBLE
241 config ARCH_SUSPEND_POSSIBLE
243 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
244 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
247 config PPC_DCR_NATIVE
257 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
260 config PPC_OF_PLATFORM_PCI
263 depends on PPC64 # not supported on 32 bits yet
266 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
267 depends on PPC32 || PPC_STD_MMU_64
270 config ARCH_SUPPORTS_UPROBES
273 config PPC_ADV_DEBUG_REGS
275 depends on 40x || BOOKE
278 config PPC_ADV_DEBUG_IACS
280 depends on PPC_ADV_DEBUG_REGS
284 config PPC_ADV_DEBUG_DACS
286 depends on PPC_ADV_DEBUG_REGS
289 config PPC_ADV_DEBUG_DVCS
291 depends on PPC_ADV_DEBUG_REGS
295 config PPC_ADV_DEBUG_DAC_RANGE
297 depends on PPC_ADV_DEBUG_REGS && 44x
300 config PPC_EMULATE_SSTEP
302 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
308 config PGTABLE_LEVELS
311 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
314 source "init/Kconfig"
316 source "kernel/Kconfig.freezer"
318 source "arch/powerpc/sysdev/Kconfig"
319 source "arch/powerpc/platforms/Kconfig"
321 menu "Kernel options"
324 bool "High memory support"
327 source kernel/Kconfig.hz
328 source kernel/Kconfig.preempt
329 source "fs/Kconfig.binfmt"
331 config HUGETLB_PAGE_SIZE_VARIABLE
333 depends on HUGETLB_PAGE
336 config MATH_EMULATION
337 bool "Math emulation"
338 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
340 Some PowerPC chips designed for embedded applications do not have
341 a floating-point unit and therefore do not implement the
342 floating-point instructions in the PowerPC instruction set. If you
343 say Y here, the kernel will include code to emulate a floating-point
344 unit, which will allow programs that use floating-point
347 This is also useful to emulate missing (optional) instructions
348 such as fsqrt on cores that do have an FPU but do not implement
349 them (such as Freescale BookE).
352 prompt "Math emulation options"
353 default MATH_EMULATION_FULL
354 depends on MATH_EMULATION
356 config MATH_EMULATION_FULL
357 bool "Emulate all the floating point instructions"
359 Select this option will enable the kernel to support to emulate
360 all the floating point instructions. If your SoC doesn't have
361 a FPU, you should select this.
363 config MATH_EMULATION_HW_UNIMPLEMENTED
364 bool "Just emulate the FPU unimplemented instructions"
366 Select this if you know there does have a hardware FPU on your
367 SoC, but some floating point instructions are not implemented by that.
371 config PPC_TRANSACTIONAL_MEM
372 bool "Transactional Memory support for POWERPC"
373 depends on PPC_BOOK3S_64
379 Support user-mode Transactional Memory on POWERPC.
381 config DISABLE_MPROFILE_KERNEL
382 bool "Disable use of mprofile-kernel for kernel tracing"
383 depends on PPC64 && CPU_LITTLE_ENDIAN
386 Selecting this options disables use of the mprofile-kernel ABI for
387 kernel tracing. That will cause options such as live patching
388 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
391 If you have a toolchain which supports mprofile-kernel, then you can
392 enable this. Otherwise leave it disabled. If you're not sure, say
395 config MPROFILE_KERNEL
396 depends on PPC64 && CPU_LITTLE_ENDIAN
397 def_bool !DISABLE_MPROFILE_KERNEL
403 bool "SWIOTLB support"
407 Support for IO bounce buffering for systems without an IOMMU.
408 This allows us to DMA to the full physical address space on
409 platforms where the size of a physical address is larger
410 than the bus address. Not all platforms support this.
413 bool "Support for enabling/disabling CPUs"
414 depends on SMP && (PPC_PSERIES || \
415 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
417 Say Y here to be able to disable and re-enable individual
418 CPUs at runtime on SMP machines.
420 Say N if you are unsure.
422 config ARCH_CPU_PROBE_RELEASE
424 depends on HOTPLUG_CPU
426 config ARCH_ENABLE_MEMORY_HOTPLUG
429 config ARCH_HAS_WALK_MEMORY
432 config ARCH_ENABLE_MEMORY_HOTREMOVE
435 config PPC64_SUPPORTS_MEMORY_FAILURE
436 bool "Add support for memory hwpoison"
437 depends on PPC_BOOK3S_64
438 default "y" if PPC_POWERNV
439 select ARCH_SUPPORTS_MEMORY_FAILURE
442 bool "kexec system call"
443 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
446 kexec is a system call that implements the ability to shutdown your
447 current kernel, and to start another kernel. It is like a reboot
448 but it is independent of the system firmware. And like a reboot
449 you can start any kernel with it, not just Linux.
451 The name comes from the similarity to the exec system call.
453 It is an ongoing process to be certain the hardware in a machine
454 is properly shutdown, so do not be surprised if this code does not
455 initially work for you. As of this writing the exact hardware
456 interface is strongly in flux, so no good recommendation can be
460 bool "Build a kdump crash kernel"
461 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
462 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
464 Build a kernel suitable for use as a kdump capture kernel.
465 The same kernel binary can be used as production kernel and dump
469 bool "Firmware-assisted dump"
470 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
472 A robust mechanism to get reliable kernel crash dump with
473 assistance from firmware. This approach does not use kexec,
474 instead firmware assists in booting the kdump kernel
475 while preserving memory contents. Firmware-assisted dump
476 is meant to be a kdump replacement offering robustness and
477 speed not possible without system firmware assistance.
482 bool "Distribute interrupts on all CPUs by default"
485 This option gives the kernel permission to distribute IRQs across
486 multiple CPUs. Saying N here will route all IRQs to the first
487 CPU. Generally saying Y is safe, although some problems have been
488 reported with SMP Power Macintoshes with this option enabled.
493 default y if SMP && PPC_PSERIES
499 depends on NEED_MULTIPLE_NODES
501 config USE_PERCPU_NUMA_NODE_ID
505 config HAVE_MEMORYLESS_NODES
509 config ARCH_SELECT_MEMORY_MODEL
513 config ARCH_FLATMEM_ENABLE
515 depends on (PPC64 && !NUMA) || PPC32
517 config ARCH_SPARSEMEM_ENABLE
520 select SPARSEMEM_VMEMMAP_ENABLE
522 config ARCH_SPARSEMEM_DEFAULT
524 depends on (SMP && PPC_PSERIES) || PPC_PS3
526 config SYS_SUPPORTS_HUGETLBFS
531 config ARCH_MEMORY_PROBE
533 depends on MEMORY_HOTPLUG
535 # Some NUMA nodes have memory ranges that span
536 # other nodes. Even though a pfn is valid and
537 # between a node's start and end pfns, it may not
538 # reside on that node. See memmap_init_zone()
540 config NODES_SPAN_OTHER_NODES
542 depends on NEED_MULTIPLE_NODES
545 bool "Using standard binutils settings"
549 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
550 Note, that kernel will be able to run only those applications,
551 which had been compiled using binutils later than 2.17.50.0.3 with
552 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
553 the older binutils, you can patch them with a trivial patch, which
554 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
560 Select the kernel logical page size. Increasing the page size
561 will reduce software overhead at each page boundary, allow
562 hardware prefetch mechanisms to be more effective, and allow
563 larger dma transfers increasing IO efficiency and reducing
564 overhead. However the utilization of memory will increase.
565 For example, each cached file will using a multiple of the
566 page size to hold its contents and the difference between the
567 end of file and the end of page is wasted.
569 Some dedicated systems, such as software raid serving with
570 accelerated calculations, have shown significant increases.
572 If you configure a 64 bit kernel for 64k pages but the
573 processor does not support them, then the kernel will simulate
574 them with 4k pages, loading them on demand, but with the
575 reduced software overhead and larger internal fragmentation.
576 For the 32 bit kernel, a large page option will not be offered
577 unless it is supported by the configured processor.
579 If unsure, choose 4K_PAGES.
583 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
587 depends on 44x || PPC_8xx
591 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
592 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
594 config PPC_256K_PAGES
595 bool "256k page size"
596 depends on 44x && !STDBINUTILS
598 Make the page size 256k.
600 As the ELF standard only requires alignment to support page
601 sizes up to 64k, you will need to compile all of your user
602 space applications with a non-standard binutils settings
603 (see the STDBINUTILS description for details).
605 Say N unless you know what you are doing.
609 config FORCE_MAX_ZONEORDER
610 int "Maximum zone order"
611 range 8 9 if PPC64 && PPC_64K_PAGES
612 default "9" if PPC64 && PPC_64K_PAGES
613 range 9 13 if PPC64 && !PPC_64K_PAGES
614 default "13" if PPC64 && !PPC_64K_PAGES
615 range 9 64 if PPC32 && PPC_16K_PAGES
616 default "9" if PPC32 && PPC_16K_PAGES
617 range 7 64 if PPC32 && PPC_64K_PAGES
618 default "7" if PPC32 && PPC_64K_PAGES
619 range 5 64 if PPC32 && PPC_256K_PAGES
620 default "5" if PPC32 && PPC_256K_PAGES
624 The kernel memory allocator divides physically contiguous memory
625 blocks into "zones", where each zone is a power of two number of
626 pages. This option selects the largest power of two that the kernel
627 keeps in the memory allocator. If you need to allocate very large
628 blocks of physically contiguous memory, then you may need to
631 This config option is actually maximum order plus one. For example,
632 a value of 11 means that the largest free memory block is 2^10 pages.
634 The page size is not necessarily 4KB. For example, on 64-bit
635 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
636 this in mind when choosing a value for this option.
638 config PPC_SUBPAGE_PROT
639 bool "Support setting protections for 4k subpages"
640 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
642 This option adds support for a system call to allow user programs
643 to set access permissions (read/write, readonly, or no access)
644 on the 4k subpages of each 64k page.
646 config PPC_COPRO_BASE
651 bool "SMT (Hyperthreading) scheduler support"
652 depends on PPC64 && SMP
654 SMT scheduler support improves the CPU scheduler's decision making
655 when dealing with POWER5 cpus at a cost of slightly increased
656 overhead in some places. If unsure say N here.
658 config PPC_DENORMALISATION
659 bool "PowerPC denormalisation exception handling"
660 depends on PPC_BOOK3S_64
661 default "y" if PPC_POWERNV
663 Add support for handling denormalisation of single precision
664 values. Useful for bare metal only. If unsure say Y here.
667 bool "Default bootloader kernel arguments"
670 string "Initial kernel command string"
671 depends on CMDLINE_BOOL
672 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
674 On some platforms, there is currently no way for the boot loader to
675 pass arguments to the kernel. For these platforms, you can supply
676 some command-line options at build time by entering them here. In
677 most cases you will need to specify the root device here.
680 bool "Always use the default kernel command string"
681 depends on CMDLINE_BOOL
683 Always use the default kernel command string, even if the boot
684 loader passes other arguments to the kernel.
685 This is useful if you cannot or don't want to change the
686 command-line options your boot loader passes to the kernel.
689 string "Additional default image types"
691 List additional targets to be built by the bootwrapper here (separated
692 by spaces). This is useful for targets that depend of device tree
693 files in the .dts directory.
695 Targets in this list will be build as part of the default build
696 target, or when the user does a 'make zImage' or a
697 'make zImage.initrd'.
699 If unsure, leave blank
701 config ARCH_WANTS_FREEZER_CONTROL
705 source kernel/power/Kconfig
708 bool "Enable seccomp to safely compute untrusted bytecode"
712 This kernel feature is useful for number crunching applications
713 that may need to compute untrusted bytecode during their
714 execution. By using pipes or other transports made available to
715 the process as file descriptors supporting the read/write
716 syscalls, it's possible to isolate those applications in
717 their own address space using seccomp. Once seccomp is
718 enabled via /proc/<pid>/seccomp, it cannot be disabled
719 and the task is only allowed to execute a few safe syscalls
720 defined by each seccomp mode.
722 If unsure, say Y. Only embedded should say N here.
733 bool "Support for ISA-bus hardware"
737 Find out whether you have ISA slots on your motherboard. ISA is the
738 name of a bus system, i.e. the way the CPU talks to the other stuff
739 inside your box. If you have an Apple machine, say N here; if you
740 have an IBM RS/6000 or pSeries machine, say Y. If you have an
741 embedded board, consult your board documentation.
747 config NEED_DMA_MAP_STATE
748 def_bool (PPC64 || NOT_COHERENT_CACHE)
750 config NEED_SG_DMA_LENGTH
753 config GENERIC_ISA_DMA
755 depends on ISA_DMA_API
758 config PPC_INDIRECT_PCI
761 default y if 40x || 44x
775 select PPC_INDIRECT_PCI
781 depends on SUSPEND && (PPC_85xx || PPC_86xx)
783 Freescale MPC85xx/MPC86xx power management controller support
784 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
789 depends on SUSPEND && (44x || 40x)
791 PPC4xx Clock Power Management (CPM) support (suspend/resume).
792 It also enables support for two different idle states (idle-wait
799 bool "Freescale Local Bus support"
802 Enables reporting of errors from the Freescale local bus
803 controller. Also contains some common code used by
804 drivers for specific local bus peripherals.
808 depends on PPC_83xx || QUICC_ENGINE || CPM2
810 Freescale General-purpose Timers support
812 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
816 # Platforms that what PCI turned unconditionally just do select PCI
817 # in their config node. Platforms that want to choose at config
818 # time should select PPC_PCI_CHOICE
819 config PPC_PCI_CHOICE
823 bool "PCI support" if PPC_PCI_CHOICE
824 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
825 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
826 default PCI_QSPAN if !4xx && !CPM2 && 8xx
827 select GENERIC_PCI_IOMAP
829 Find out whether your system includes a PCI bus. PCI is the name of
830 a bus system, i.e. the way the CPU talks to the other stuff inside
831 your box. If you say Y here, the kernel will include drivers and
832 infrastructure code to support PCI bus devices.
842 depends on !4xx && !CPM2 && 8xx
845 Say Y here if you have a system based on a Motorola 8xx-series
846 embedded processor with a QSPAN PCI interface, otherwise say N.
850 depends on PCI && 8260
851 select PPC_INDIRECT_PCI
854 source "drivers/pci/Kconfig"
856 source "drivers/pcmcia/Kconfig"
863 tristate "RapidIO support"
864 depends on HAS_RAPIDIO || PCI
866 If you say Y here, the kernel will include drivers and
867 infrastructure code to support RapidIO interconnect devices.
870 bool "Freescale Embedded SRIO Controller support"
871 depends on RAPIDIO = y && HAS_RAPIDIO
874 Include support for RapidIO controller on Freescale embedded
875 processors (MPC8548, MPC8641, etc).
877 source "drivers/rapidio/Kconfig"
881 config NONSTATIC_KERNEL
885 menu "Advanced setup"
888 config ADVANCED_OPTIONS
889 bool "Prompt for advanced kernel configuration options"
891 This option will enable prompting for a variety of advanced kernel
892 configuration options. These options can cause the kernel to not
893 work if they are set incorrectly, but can be used to optimize certain
894 aspects of kernel memory management.
896 Unless you know what you are doing, say N here.
898 comment "Default settings for advanced configuration options are used"
899 depends on !ADVANCED_OPTIONS
901 config LOWMEM_SIZE_BOOL
902 bool "Set maximum low memory"
903 depends on ADVANCED_OPTIONS
905 This option allows you to set the maximum amount of memory which
906 will be used as "low memory", that is, memory which the kernel can
907 access directly, without having to set up a kernel virtual mapping.
908 This can be useful in optimizing the layout of kernel virtual
911 Say N here unless you know what you are doing.
914 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
917 config LOWMEM_CAM_NUM_BOOL
918 bool "Set number of CAMs to use to map low memory"
919 depends on ADVANCED_OPTIONS && FSL_BOOKE
921 This option allows you to set the maximum number of CAM slots that
922 will be used to map low memory. There are a limited number of slots
923 available and even more limited number that will fit in the L1 MMU.
924 However, using more entries will allow mapping more low memory. This
925 can be useful in optimizing the layout of kernel virtual memory.
927 Say N here unless you know what you are doing.
929 config LOWMEM_CAM_NUM
931 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
934 config DYNAMIC_MEMSTART
935 bool "Enable page aligned dynamic load address for kernel"
936 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
937 select NONSTATIC_KERNEL
939 This option enables the kernel to be loaded at any page aligned
940 physical address. The kernel creates a mapping from KERNELBASE to
941 the address where the kernel is loaded. The page size here implies
942 the TLB page size of the mapping for kernel on the particular platform.
943 Please refer to the init code for finding the TLB page size.
945 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
946 kernel image, where the only restriction is the page aligned kernel
947 load address. When this option is enabled, the compile time physical
948 address CONFIG_PHYSICAL_START is ignored.
950 This option is overridden by CONFIG_RELOCATABLE
953 bool "Build a relocatable kernel"
954 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
955 select NONSTATIC_KERNEL
957 This builds a kernel image that is capable of running at the
958 location the kernel is loaded at, without any alignment restrictions.
959 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
961 One use is for the kexec on panic case where the recovery kernel
962 must live at a different physical address than the primary
965 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
966 it has been loaded at and the compile time physical addresses
967 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
968 setting can still be useful to bootwrappers that need to know the
969 load address of the kernel (eg. u-boot/mkimage).
971 config RELOCATABLE_PPC32
973 depends on PPC32 && RELOCATABLE
975 config PAGE_OFFSET_BOOL
976 bool "Set custom page offset address"
977 depends on ADVANCED_OPTIONS
979 This option allows you to set the kernel virtual address at which
980 the kernel will map low memory. This can be useful in optimizing
981 the virtual memory layout of the system.
983 Say N here unless you know what you are doing.
986 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
989 config KERNEL_START_BOOL
990 bool "Set custom kernel base address"
991 depends on ADVANCED_OPTIONS
993 This option allows you to set the kernel virtual address at which
994 the kernel will be loaded. Normally this should match PAGE_OFFSET
995 however there are times (like kdump) that one might not want them
998 Say N here unless you know what you are doing.
1001 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1002 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1003 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1004 default "0xc0000000"
1006 config PHYSICAL_START_BOOL
1007 bool "Set physical address where the kernel is loaded"
1008 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1010 This gives the physical address where the kernel is loaded.
1012 Say N here unless you know what you are doing.
1014 config PHYSICAL_START
1015 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1016 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1017 default "0x00000000"
1019 config PHYSICAL_ALIGN
1021 default "0x04000000" if FSL_BOOKE
1023 This value puts the alignment restrictions on physical address
1024 where kernel is loaded and run from. Kernel is compiled for an
1025 address which meets above alignment restriction.
1027 config TASK_SIZE_BOOL
1028 bool "Set custom user task size"
1029 depends on ADVANCED_OPTIONS
1031 This option allows you to set the amount of virtual address space
1032 allocated to user tasks. This can be useful in optimizing the
1033 virtual memory layout of the system.
1035 Say N here unless you know what you are doing.
1038 hex "Size of user task space" if TASK_SIZE_BOOL
1039 default "0x80000000" if PPC_8xx
1040 default "0xc0000000"
1042 config CONSISTENT_SIZE_BOOL
1043 bool "Set custom consistent memory pool size"
1044 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1046 This option allows you to set the size of the
1047 consistent memory pool. This pool of virtual memory
1048 is used to make consistent memory allocations.
1050 config CONSISTENT_SIZE
1051 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1052 default "0x00200000" if NOT_COHERENT_CACHE
1055 bool "Pinned Kernel TLBs (860 ONLY)"
1056 depends on ADVANCED_OPTIONS && 8xx
1061 bool "Build a relocatable kernel"
1062 depends on !COMPILE_TEST
1063 select NONSTATIC_KERNEL
1065 This builds a kernel image that is capable of running anywhere
1066 in the RMA (real memory area) at any 16k-aligned base address.
1067 The kernel is linked as a position-independent executable (PIE)
1068 and contains dynamic relocations which are processed early
1069 in the bootup process.
1071 One use is for the kexec on panic case where the recovery kernel
1072 must live at a different physical address than the primary
1075 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1078 default "0xc000000000000000"
1081 default "0xc000000000000000"
1082 config PHYSICAL_START
1084 default "0x00000000"
1090 source "net/Kconfig"
1092 source "drivers/Kconfig"
1096 source "lib/Kconfig"
1098 source "arch/powerpc/Kconfig.debug"
1100 source "security/Kconfig"
1104 depends on COMPAT && KEYS
1107 source "crypto/Kconfig"
1109 config PPC_LIB_RHEAP
1112 source "arch/powerpc/kvm/Kconfig"
1114 source "kernel/livepatch/Kconfig"