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
131 select HAVE_CBPF_JIT if CPU_BIG_ENDIAN
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
158 select HAVE_NMI if PERF_EVENTS
160 select EDAC_ATOMIC_SCRUB
161 select ARCH_HAS_DMA_SET_COHERENT_MASK
162 select ARCH_HAS_DEVMEM_IS_ALLOWED
163 select HAVE_ARCH_SECCOMP_FILTER
164 select ARCH_HAS_UBSAN_SANITIZE_ALL
165 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
166 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
169 def_bool CPU_LITTLE_ENDIAN
182 select COMPAT_BINFMT_ELF
183 select ARCH_WANT_OLD_COMPAT_IPC
184 select COMPAT_OLD_SIGACTION
186 config SYSVIPC_COMPAT
188 depends on COMPAT && SYSVIPC
191 # All PPC32s use generic nvram driver through ppc_md
196 config SCHED_OMIT_FRAME_POINTER
200 config ARCH_MAY_HAVE_PC_FDC
204 config PPC_UDBG_16550
208 config GENERIC_TBSYNC
210 default y if PPC32 && SMP
222 config SYS_SUPPORTS_APM_EMULATION
223 default y if PMAC_APM_EMU
229 Used to allow a board to specify it wants an ePAPR compliant wrapper.
232 config DEFAULT_UIMAGE
235 Used to allow a board to specify it wants a uImage built by default
238 config ARCH_HIBERNATION_POSSIBLE
242 config ARCH_SUSPEND_POSSIBLE
244 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
245 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
248 config PPC_DCR_NATIVE
258 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
261 config PPC_OF_PLATFORM_PCI
264 depends on PPC64 # not supported on 32 bits yet
267 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
268 depends on PPC32 || PPC_STD_MMU_64
271 config ARCH_SUPPORTS_UPROBES
274 config PPC_ADV_DEBUG_REGS
276 depends on 40x || BOOKE
279 config PPC_ADV_DEBUG_IACS
281 depends on PPC_ADV_DEBUG_REGS
285 config PPC_ADV_DEBUG_DACS
287 depends on PPC_ADV_DEBUG_REGS
290 config PPC_ADV_DEBUG_DVCS
292 depends on PPC_ADV_DEBUG_REGS
296 config PPC_ADV_DEBUG_DAC_RANGE
298 depends on PPC_ADV_DEBUG_REGS && 44x
301 config PPC_EMULATE_SSTEP
303 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
309 config PGTABLE_LEVELS
312 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
315 source "init/Kconfig"
317 source "kernel/Kconfig.freezer"
319 source "arch/powerpc/sysdev/Kconfig"
320 source "arch/powerpc/platforms/Kconfig"
322 menu "Kernel options"
325 bool "High memory support"
328 source kernel/Kconfig.hz
329 source kernel/Kconfig.preempt
330 source "fs/Kconfig.binfmt"
332 config HUGETLB_PAGE_SIZE_VARIABLE
334 depends on HUGETLB_PAGE
337 config MATH_EMULATION
338 bool "Math emulation"
339 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
341 Some PowerPC chips designed for embedded applications do not have
342 a floating-point unit and therefore do not implement the
343 floating-point instructions in the PowerPC instruction set. If you
344 say Y here, the kernel will include code to emulate a floating-point
345 unit, which will allow programs that use floating-point
348 This is also useful to emulate missing (optional) instructions
349 such as fsqrt on cores that do have an FPU but do not implement
350 them (such as Freescale BookE).
353 prompt "Math emulation options"
354 default MATH_EMULATION_FULL
355 depends on MATH_EMULATION
357 config MATH_EMULATION_FULL
358 bool "Emulate all the floating point instructions"
360 Select this option will enable the kernel to support to emulate
361 all the floating point instructions. If your SoC doesn't have
362 a FPU, you should select this.
364 config MATH_EMULATION_HW_UNIMPLEMENTED
365 bool "Just emulate the FPU unimplemented instructions"
367 Select this if you know there does have a hardware FPU on your
368 SoC, but some floating point instructions are not implemented by that.
372 config PPC_TRANSACTIONAL_MEM
373 bool "Transactional Memory support for POWERPC"
374 depends on PPC_BOOK3S_64
380 Support user-mode Transactional Memory on POWERPC.
382 config DISABLE_MPROFILE_KERNEL
383 bool "Disable use of mprofile-kernel for kernel tracing"
384 depends on PPC64 && CPU_LITTLE_ENDIAN
387 Selecting this options disables use of the mprofile-kernel ABI for
388 kernel tracing. That will cause options such as live patching
389 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
392 If you have a toolchain which supports mprofile-kernel, then you can
393 enable this. Otherwise leave it disabled. If you're not sure, say
396 config MPROFILE_KERNEL
397 depends on PPC64 && CPU_LITTLE_ENDIAN
398 def_bool !DISABLE_MPROFILE_KERNEL
404 bool "SWIOTLB support"
408 Support for IO bounce buffering for systems without an IOMMU.
409 This allows us to DMA to the full physical address space on
410 platforms where the size of a physical address is larger
411 than the bus address. Not all platforms support this.
414 bool "Support for enabling/disabling CPUs"
415 depends on SMP && (PPC_PSERIES || \
416 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
418 Say Y here to be able to disable and re-enable individual
419 CPUs at runtime on SMP machines.
421 Say N if you are unsure.
423 config ARCH_CPU_PROBE_RELEASE
425 depends on HOTPLUG_CPU
427 config ARCH_ENABLE_MEMORY_HOTPLUG
430 config ARCH_HAS_WALK_MEMORY
433 config ARCH_ENABLE_MEMORY_HOTREMOVE
436 config PPC64_SUPPORTS_MEMORY_FAILURE
437 bool "Add support for memory hwpoison"
438 depends on PPC_BOOK3S_64
439 default "y" if PPC_POWERNV
440 select ARCH_SUPPORTS_MEMORY_FAILURE
443 bool "kexec system call"
444 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
447 kexec is a system call that implements the ability to shutdown your
448 current kernel, and to start another kernel. It is like a reboot
449 but it is independent of the system firmware. And like a reboot
450 you can start any kernel with it, not just Linux.
452 The name comes from the similarity to the exec system call.
454 It is an ongoing process to be certain the hardware in a machine
455 is properly shutdown, so do not be surprised if this code does not
456 initially work for you. As of this writing the exact hardware
457 interface is strongly in flux, so no good recommendation can be
461 bool "Build a kdump crash kernel"
462 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
463 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
465 Build a kernel suitable for use as a kdump capture kernel.
466 The same kernel binary can be used as production kernel and dump
470 bool "Firmware-assisted dump"
471 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
473 A robust mechanism to get reliable kernel crash dump with
474 assistance from firmware. This approach does not use kexec,
475 instead firmware assists in booting the kdump kernel
476 while preserving memory contents. Firmware-assisted dump
477 is meant to be a kdump replacement offering robustness and
478 speed not possible without system firmware assistance.
483 bool "Distribute interrupts on all CPUs by default"
486 This option gives the kernel permission to distribute IRQs across
487 multiple CPUs. Saying N here will route all IRQs to the first
488 CPU. Generally saying Y is safe, although some problems have been
489 reported with SMP Power Macintoshes with this option enabled.
494 default y if SMP && PPC_PSERIES
500 depends on NEED_MULTIPLE_NODES
502 config USE_PERCPU_NUMA_NODE_ID
506 config HAVE_MEMORYLESS_NODES
510 config ARCH_SELECT_MEMORY_MODEL
514 config ARCH_FLATMEM_ENABLE
516 depends on (PPC64 && !NUMA) || PPC32
518 config ARCH_SPARSEMEM_ENABLE
521 select SPARSEMEM_VMEMMAP_ENABLE
523 config ARCH_SPARSEMEM_DEFAULT
525 depends on (SMP && PPC_PSERIES) || PPC_PS3
527 config SYS_SUPPORTS_HUGETLBFS
532 config ARCH_MEMORY_PROBE
534 depends on MEMORY_HOTPLUG
536 # Some NUMA nodes have memory ranges that span
537 # other nodes. Even though a pfn is valid and
538 # between a node's start and end pfns, it may not
539 # reside on that node. See memmap_init_zone()
541 config NODES_SPAN_OTHER_NODES
543 depends on NEED_MULTIPLE_NODES
546 bool "Using standard binutils settings"
550 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
551 Note, that kernel will be able to run only those applications,
552 which had been compiled using binutils later than 2.17.50.0.3 with
553 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
554 the older binutils, you can patch them with a trivial patch, which
555 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
561 Select the kernel logical page size. Increasing the page size
562 will reduce software overhead at each page boundary, allow
563 hardware prefetch mechanisms to be more effective, and allow
564 larger dma transfers increasing IO efficiency and reducing
565 overhead. However the utilization of memory will increase.
566 For example, each cached file will using a multiple of the
567 page size to hold its contents and the difference between the
568 end of file and the end of page is wasted.
570 Some dedicated systems, such as software raid serving with
571 accelerated calculations, have shown significant increases.
573 If you configure a 64 bit kernel for 64k pages but the
574 processor does not support them, then the kernel will simulate
575 them with 4k pages, loading them on demand, but with the
576 reduced software overhead and larger internal fragmentation.
577 For the 32 bit kernel, a large page option will not be offered
578 unless it is supported by the configured processor.
580 If unsure, choose 4K_PAGES.
584 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
588 depends on 44x || PPC_8xx
592 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
593 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
595 config PPC_256K_PAGES
596 bool "256k page size"
597 depends on 44x && !STDBINUTILS
599 Make the page size 256k.
601 As the ELF standard only requires alignment to support page
602 sizes up to 64k, you will need to compile all of your user
603 space applications with a non-standard binutils settings
604 (see the STDBINUTILS description for details).
606 Say N unless you know what you are doing.
610 config FORCE_MAX_ZONEORDER
611 int "Maximum zone order"
612 range 8 9 if PPC64 && PPC_64K_PAGES
613 default "9" if PPC64 && PPC_64K_PAGES
614 range 9 13 if PPC64 && !PPC_64K_PAGES
615 default "13" if PPC64 && !PPC_64K_PAGES
616 range 9 64 if PPC32 && PPC_16K_PAGES
617 default "9" if PPC32 && PPC_16K_PAGES
618 range 7 64 if PPC32 && PPC_64K_PAGES
619 default "7" if PPC32 && PPC_64K_PAGES
620 range 5 64 if PPC32 && PPC_256K_PAGES
621 default "5" if PPC32 && PPC_256K_PAGES
625 The kernel memory allocator divides physically contiguous memory
626 blocks into "zones", where each zone is a power of two number of
627 pages. This option selects the largest power of two that the kernel
628 keeps in the memory allocator. If you need to allocate very large
629 blocks of physically contiguous memory, then you may need to
632 This config option is actually maximum order plus one. For example,
633 a value of 11 means that the largest free memory block is 2^10 pages.
635 The page size is not necessarily 4KB. For example, on 64-bit
636 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
637 this in mind when choosing a value for this option.
639 config PPC_SUBPAGE_PROT
640 bool "Support setting protections for 4k subpages"
641 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
643 This option adds support for a system call to allow user programs
644 to set access permissions (read/write, readonly, or no access)
645 on the 4k subpages of each 64k page.
647 config PPC_COPRO_BASE
652 bool "SMT (Hyperthreading) scheduler support"
653 depends on PPC64 && SMP
655 SMT scheduler support improves the CPU scheduler's decision making
656 when dealing with POWER5 cpus at a cost of slightly increased
657 overhead in some places. If unsure say N here.
659 config PPC_DENORMALISATION
660 bool "PowerPC denormalisation exception handling"
661 depends on PPC_BOOK3S_64
662 default "y" if PPC_POWERNV
664 Add support for handling denormalisation of single precision
665 values. Useful for bare metal only. If unsure say Y here.
668 bool "Default bootloader kernel arguments"
671 string "Initial kernel command string"
672 depends on CMDLINE_BOOL
673 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
675 On some platforms, there is currently no way for the boot loader to
676 pass arguments to the kernel. For these platforms, you can supply
677 some command-line options at build time by entering them here. In
678 most cases you will need to specify the root device here.
681 bool "Always use the default kernel command string"
682 depends on CMDLINE_BOOL
684 Always use the default kernel command string, even if the boot
685 loader passes other arguments to the kernel.
686 This is useful if you cannot or don't want to change the
687 command-line options your boot loader passes to the kernel.
690 string "Additional default image types"
692 List additional targets to be built by the bootwrapper here (separated
693 by spaces). This is useful for targets that depend of device tree
694 files in the .dts directory.
696 Targets in this list will be build as part of the default build
697 target, or when the user does a 'make zImage' or a
698 'make zImage.initrd'.
700 If unsure, leave blank
702 config ARCH_WANTS_FREEZER_CONTROL
706 source kernel/power/Kconfig
709 bool "Enable seccomp to safely compute untrusted bytecode"
713 This kernel feature is useful for number crunching applications
714 that may need to compute untrusted bytecode during their
715 execution. By using pipes or other transports made available to
716 the process as file descriptors supporting the read/write
717 syscalls, it's possible to isolate those applications in
718 their own address space using seccomp. Once seccomp is
719 enabled via /proc/<pid>/seccomp, it cannot be disabled
720 and the task is only allowed to execute a few safe syscalls
721 defined by each seccomp mode.
723 If unsure, say Y. Only embedded should say N here.
734 bool "Support for ISA-bus hardware"
738 Find out whether you have ISA slots on your motherboard. ISA is the
739 name of a bus system, i.e. the way the CPU talks to the other stuff
740 inside your box. If you have an Apple machine, say N here; if you
741 have an IBM RS/6000 or pSeries machine, say Y. If you have an
742 embedded board, consult your board documentation.
748 config NEED_DMA_MAP_STATE
749 def_bool (PPC64 || NOT_COHERENT_CACHE)
751 config NEED_SG_DMA_LENGTH
754 config GENERIC_ISA_DMA
756 depends on ISA_DMA_API
759 config PPC_INDIRECT_PCI
762 default y if 40x || 44x
776 select PPC_INDIRECT_PCI
782 depends on SUSPEND && (PPC_85xx || PPC_86xx)
784 Freescale MPC85xx/MPC86xx power management controller support
785 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
790 depends on SUSPEND && (44x || 40x)
792 PPC4xx Clock Power Management (CPM) support (suspend/resume).
793 It also enables support for two different idle states (idle-wait
800 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"