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
167 select HAVE_ARCH_HARDENED_USERCOPY
170 def_bool CPU_LITTLE_ENDIAN
183 select COMPAT_BINFMT_ELF
184 select ARCH_WANT_OLD_COMPAT_IPC
185 select COMPAT_OLD_SIGACTION
187 config SYSVIPC_COMPAT
189 depends on COMPAT && SYSVIPC
192 # All PPC32s use generic nvram driver through ppc_md
197 config SCHED_OMIT_FRAME_POINTER
201 config ARCH_MAY_HAVE_PC_FDC
205 config PPC_UDBG_16550
209 config GENERIC_TBSYNC
211 default y if PPC32 && SMP
223 config SYS_SUPPORTS_APM_EMULATION
224 default y if PMAC_APM_EMU
230 Used to allow a board to specify it wants an ePAPR compliant wrapper.
233 config DEFAULT_UIMAGE
236 Used to allow a board to specify it wants a uImage built by default
239 config ARCH_HIBERNATION_POSSIBLE
243 config ARCH_SUSPEND_POSSIBLE
245 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
246 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
249 config PPC_DCR_NATIVE
259 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
262 config PPC_OF_PLATFORM_PCI
265 depends on PPC64 # not supported on 32 bits yet
268 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
269 depends on PPC32 || PPC_STD_MMU_64
272 config ARCH_SUPPORTS_UPROBES
275 config PPC_ADV_DEBUG_REGS
277 depends on 40x || BOOKE
280 config PPC_ADV_DEBUG_IACS
282 depends on PPC_ADV_DEBUG_REGS
286 config PPC_ADV_DEBUG_DACS
288 depends on PPC_ADV_DEBUG_REGS
291 config PPC_ADV_DEBUG_DVCS
293 depends on PPC_ADV_DEBUG_REGS
297 config PPC_ADV_DEBUG_DAC_RANGE
299 depends on PPC_ADV_DEBUG_REGS && 44x
302 config PPC_EMULATE_SSTEP
304 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
310 config PGTABLE_LEVELS
313 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
316 source "init/Kconfig"
318 source "kernel/Kconfig.freezer"
320 source "arch/powerpc/sysdev/Kconfig"
321 source "arch/powerpc/platforms/Kconfig"
323 menu "Kernel options"
326 bool "High memory support"
329 source kernel/Kconfig.hz
330 source kernel/Kconfig.preempt
331 source "fs/Kconfig.binfmt"
333 config HUGETLB_PAGE_SIZE_VARIABLE
335 depends on HUGETLB_PAGE
338 config MATH_EMULATION
339 bool "Math emulation"
340 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
342 Some PowerPC chips designed for embedded applications do not have
343 a floating-point unit and therefore do not implement the
344 floating-point instructions in the PowerPC instruction set. If you
345 say Y here, the kernel will include code to emulate a floating-point
346 unit, which will allow programs that use floating-point
349 This is also useful to emulate missing (optional) instructions
350 such as fsqrt on cores that do have an FPU but do not implement
351 them (such as Freescale BookE).
354 prompt "Math emulation options"
355 default MATH_EMULATION_FULL
356 depends on MATH_EMULATION
358 config MATH_EMULATION_FULL
359 bool "Emulate all the floating point instructions"
361 Select this option will enable the kernel to support to emulate
362 all the floating point instructions. If your SoC doesn't have
363 a FPU, you should select this.
365 config MATH_EMULATION_HW_UNIMPLEMENTED
366 bool "Just emulate the FPU unimplemented instructions"
368 Select this if you know there does have a hardware FPU on your
369 SoC, but some floating point instructions are not implemented by that.
373 config PPC_TRANSACTIONAL_MEM
374 bool "Transactional Memory support for POWERPC"
375 depends on PPC_BOOK3S_64
381 Support user-mode Transactional Memory on POWERPC.
383 config DISABLE_MPROFILE_KERNEL
384 bool "Disable use of mprofile-kernel for kernel tracing"
385 depends on PPC64 && CPU_LITTLE_ENDIAN
388 Selecting this options disables use of the mprofile-kernel ABI for
389 kernel tracing. That will cause options such as live patching
390 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
393 If you have a toolchain which supports mprofile-kernel, then you can
394 enable this. Otherwise leave it disabled. If you're not sure, say
397 config MPROFILE_KERNEL
398 depends on PPC64 && CPU_LITTLE_ENDIAN
399 def_bool !DISABLE_MPROFILE_KERNEL
405 bool "SWIOTLB support"
409 Support for IO bounce buffering for systems without an IOMMU.
410 This allows us to DMA to the full physical address space on
411 platforms where the size of a physical address is larger
412 than the bus address. Not all platforms support this.
415 bool "Support for enabling/disabling CPUs"
416 depends on SMP && (PPC_PSERIES || \
417 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
419 Say Y here to be able to disable and re-enable individual
420 CPUs at runtime on SMP machines.
422 Say N if you are unsure.
424 config ARCH_CPU_PROBE_RELEASE
426 depends on HOTPLUG_CPU
428 config ARCH_ENABLE_MEMORY_HOTPLUG
431 config ARCH_HAS_WALK_MEMORY
434 config ARCH_ENABLE_MEMORY_HOTREMOVE
437 config PPC64_SUPPORTS_MEMORY_FAILURE
438 bool "Add support for memory hwpoison"
439 depends on PPC_BOOK3S_64
440 default "y" if PPC_POWERNV
441 select ARCH_SUPPORTS_MEMORY_FAILURE
444 bool "kexec system call"
445 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
448 kexec is a system call that implements the ability to shutdown your
449 current kernel, and to start another kernel. It is like a reboot
450 but it is independent of the system firmware. And like a reboot
451 you can start any kernel with it, not just Linux.
453 The name comes from the similarity to the exec system call.
455 It is an ongoing process to be certain the hardware in a machine
456 is properly shutdown, so do not be surprised if this code does not
457 initially work for you. As of this writing the exact hardware
458 interface is strongly in flux, so no good recommendation can be
462 bool "Build a kdump crash kernel"
463 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
464 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
466 Build a kernel suitable for use as a kdump capture kernel.
467 The same kernel binary can be used as production kernel and dump
471 bool "Firmware-assisted dump"
472 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
474 A robust mechanism to get reliable kernel crash dump with
475 assistance from firmware. This approach does not use kexec,
476 instead firmware assists in booting the kdump kernel
477 while preserving memory contents. Firmware-assisted dump
478 is meant to be a kdump replacement offering robustness and
479 speed not possible without system firmware assistance.
484 bool "Distribute interrupts on all CPUs by default"
487 This option gives the kernel permission to distribute IRQs across
488 multiple CPUs. Saying N here will route all IRQs to the first
489 CPU. Generally saying Y is safe, although some problems have been
490 reported with SMP Power Macintoshes with this option enabled.
495 default y if SMP && PPC_PSERIES
501 depends on NEED_MULTIPLE_NODES
503 config USE_PERCPU_NUMA_NODE_ID
507 config HAVE_MEMORYLESS_NODES
511 config ARCH_SELECT_MEMORY_MODEL
515 config ARCH_FLATMEM_ENABLE
517 depends on (PPC64 && !NUMA) || PPC32
519 config ARCH_SPARSEMEM_ENABLE
522 select SPARSEMEM_VMEMMAP_ENABLE
524 config ARCH_SPARSEMEM_DEFAULT
526 depends on (SMP && PPC_PSERIES) || PPC_PS3
528 config SYS_SUPPORTS_HUGETLBFS
533 config ARCH_MEMORY_PROBE
535 depends on MEMORY_HOTPLUG
537 # Some NUMA nodes have memory ranges that span
538 # other nodes. Even though a pfn is valid and
539 # between a node's start and end pfns, it may not
540 # reside on that node. See memmap_init_zone()
542 config NODES_SPAN_OTHER_NODES
544 depends on NEED_MULTIPLE_NODES
547 bool "Using standard binutils settings"
551 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
552 Note, that kernel will be able to run only those applications,
553 which had been compiled using binutils later than 2.17.50.0.3 with
554 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
555 the older binutils, you can patch them with a trivial patch, which
556 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
562 Select the kernel logical page size. Increasing the page size
563 will reduce software overhead at each page boundary, allow
564 hardware prefetch mechanisms to be more effective, and allow
565 larger dma transfers increasing IO efficiency and reducing
566 overhead. However the utilization of memory will increase.
567 For example, each cached file will using a multiple of the
568 page size to hold its contents and the difference between the
569 end of file and the end of page is wasted.
571 Some dedicated systems, such as software raid serving with
572 accelerated calculations, have shown significant increases.
574 If you configure a 64 bit kernel for 64k pages but the
575 processor does not support them, then the kernel will simulate
576 them with 4k pages, loading them on demand, but with the
577 reduced software overhead and larger internal fragmentation.
578 For the 32 bit kernel, a large page option will not be offered
579 unless it is supported by the configured processor.
581 If unsure, choose 4K_PAGES.
585 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
589 depends on 44x || PPC_8xx
593 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
594 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
596 config PPC_256K_PAGES
597 bool "256k page size"
598 depends on 44x && !STDBINUTILS
600 Make the page size 256k.
602 As the ELF standard only requires alignment to support page
603 sizes up to 64k, you will need to compile all of your user
604 space applications with a non-standard binutils settings
605 (see the STDBINUTILS description for details).
607 Say N unless you know what you are doing.
611 config FORCE_MAX_ZONEORDER
612 int "Maximum zone order"
613 range 8 9 if PPC64 && PPC_64K_PAGES
614 default "9" if PPC64 && PPC_64K_PAGES
615 range 9 13 if PPC64 && !PPC_64K_PAGES
616 default "13" if PPC64 && !PPC_64K_PAGES
617 range 9 64 if PPC32 && PPC_16K_PAGES
618 default "9" if PPC32 && PPC_16K_PAGES
619 range 7 64 if PPC32 && PPC_64K_PAGES
620 default "7" if PPC32 && PPC_64K_PAGES
621 range 5 64 if PPC32 && PPC_256K_PAGES
622 default "5" if PPC32 && PPC_256K_PAGES
626 The kernel memory allocator divides physically contiguous memory
627 blocks into "zones", where each zone is a power of two number of
628 pages. This option selects the largest power of two that the kernel
629 keeps in the memory allocator. If you need to allocate very large
630 blocks of physically contiguous memory, then you may need to
633 This config option is actually maximum order plus one. For example,
634 a value of 11 means that the largest free memory block is 2^10 pages.
636 The page size is not necessarily 4KB. For example, on 64-bit
637 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
638 this in mind when choosing a value for this option.
640 config PPC_SUBPAGE_PROT
641 bool "Support setting protections for 4k subpages"
642 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
644 This option adds support for a system call to allow user programs
645 to set access permissions (read/write, readonly, or no access)
646 on the 4k subpages of each 64k page.
648 config PPC_COPRO_BASE
653 bool "SMT (Hyperthreading) scheduler support"
654 depends on PPC64 && SMP
656 SMT scheduler support improves the CPU scheduler's decision making
657 when dealing with POWER5 cpus at a cost of slightly increased
658 overhead in some places. If unsure say N here.
660 config PPC_DENORMALISATION
661 bool "PowerPC denormalisation exception handling"
662 depends on PPC_BOOK3S_64
663 default "y" if PPC_POWERNV
665 Add support for handling denormalisation of single precision
666 values. Useful for bare metal only. If unsure say Y here.
669 bool "Default bootloader kernel arguments"
672 string "Initial kernel command string"
673 depends on CMDLINE_BOOL
674 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
676 On some platforms, there is currently no way for the boot loader to
677 pass arguments to the kernel. For these platforms, you can supply
678 some command-line options at build time by entering them here. In
679 most cases you will need to specify the root device here.
682 bool "Always use the default kernel command string"
683 depends on CMDLINE_BOOL
685 Always use the default kernel command string, even if the boot
686 loader passes other arguments to the kernel.
687 This is useful if you cannot or don't want to change the
688 command-line options your boot loader passes to the kernel.
691 string "Additional default image types"
693 List additional targets to be built by the bootwrapper here (separated
694 by spaces). This is useful for targets that depend of device tree
695 files in the .dts directory.
697 Targets in this list will be build as part of the default build
698 target, or when the user does a 'make zImage' or a
699 'make zImage.initrd'.
701 If unsure, leave blank
703 config ARCH_WANTS_FREEZER_CONTROL
707 source kernel/power/Kconfig
710 bool "Enable seccomp to safely compute untrusted bytecode"
714 This kernel feature is useful for number crunching applications
715 that may need to compute untrusted bytecode during their
716 execution. By using pipes or other transports made available to
717 the process as file descriptors supporting the read/write
718 syscalls, it's possible to isolate those applications in
719 their own address space using seccomp. Once seccomp is
720 enabled via /proc/<pid>/seccomp, it cannot be disabled
721 and the task is only allowed to execute a few safe syscalls
722 defined by each seccomp mode.
724 If unsure, say Y. Only embedded should say N here.
735 bool "Support for ISA-bus hardware"
739 Find out whether you have ISA slots on your motherboard. ISA is the
740 name of a bus system, i.e. the way the CPU talks to the other stuff
741 inside your box. If you have an Apple machine, say N here; if you
742 have an IBM RS/6000 or pSeries machine, say Y. If you have an
743 embedded board, consult your board documentation.
749 config NEED_DMA_MAP_STATE
750 def_bool (PPC64 || NOT_COHERENT_CACHE)
752 config NEED_SG_DMA_LENGTH
755 config GENERIC_ISA_DMA
757 depends on ISA_DMA_API
760 config PPC_INDIRECT_PCI
763 default y if 40x || 44x
777 select PPC_INDIRECT_PCI
783 depends on SUSPEND && (PPC_85xx || PPC_86xx)
785 Freescale MPC85xx/MPC86xx power management controller support
786 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
791 depends on SUSPEND && (44x || 40x)
793 PPC4xx Clock Power Management (CPM) support (suspend/resume).
794 It also enables support for two different idle states (idle-wait
801 bool "Freescale Local Bus support"
803 Enables reporting of errors from the Freescale local bus
804 controller. Also contains some common code used by
805 drivers for specific local bus peripherals.
809 depends on PPC_83xx || QUICC_ENGINE || CPM2
811 Freescale General-purpose Timers support
813 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
817 # Platforms that what PCI turned unconditionally just do select PCI
818 # in their config node. Platforms that want to choose at config
819 # time should select PPC_PCI_CHOICE
820 config PPC_PCI_CHOICE
824 bool "PCI support" if PPC_PCI_CHOICE
825 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
826 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
827 default PCI_QSPAN if !4xx && !CPM2 && 8xx
828 select GENERIC_PCI_IOMAP
830 Find out whether your system includes a PCI bus. PCI is the name of
831 a bus system, i.e. the way the CPU talks to the other stuff inside
832 your box. If you say Y here, the kernel will include drivers and
833 infrastructure code to support PCI bus devices.
843 depends on !4xx && !CPM2 && 8xx
846 Say Y here if you have a system based on a Motorola 8xx-series
847 embedded processor with a QSPAN PCI interface, otherwise say N.
851 depends on PCI && 8260
852 select PPC_INDIRECT_PCI
855 source "drivers/pci/Kconfig"
857 source "drivers/pcmcia/Kconfig"
864 tristate "RapidIO support"
865 depends on HAS_RAPIDIO || PCI
867 If you say Y here, the kernel will include drivers and
868 infrastructure code to support RapidIO interconnect devices.
871 bool "Freescale Embedded SRIO Controller support"
872 depends on RAPIDIO = y && HAS_RAPIDIO
875 Include support for RapidIO controller on Freescale embedded
876 processors (MPC8548, MPC8641, etc).
878 source "drivers/rapidio/Kconfig"
882 config NONSTATIC_KERNEL
886 menu "Advanced setup"
889 config ADVANCED_OPTIONS
890 bool "Prompt for advanced kernel configuration options"
892 This option will enable prompting for a variety of advanced kernel
893 configuration options. These options can cause the kernel to not
894 work if they are set incorrectly, but can be used to optimize certain
895 aspects of kernel memory management.
897 Unless you know what you are doing, say N here.
899 comment "Default settings for advanced configuration options are used"
900 depends on !ADVANCED_OPTIONS
902 config LOWMEM_SIZE_BOOL
903 bool "Set maximum low memory"
904 depends on ADVANCED_OPTIONS
906 This option allows you to set the maximum amount of memory which
907 will be used as "low memory", that is, memory which the kernel can
908 access directly, without having to set up a kernel virtual mapping.
909 This can be useful in optimizing the layout of kernel virtual
912 Say N here unless you know what you are doing.
915 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
918 config LOWMEM_CAM_NUM_BOOL
919 bool "Set number of CAMs to use to map low memory"
920 depends on ADVANCED_OPTIONS && FSL_BOOKE
922 This option allows you to set the maximum number of CAM slots that
923 will be used to map low memory. There are a limited number of slots
924 available and even more limited number that will fit in the L1 MMU.
925 However, using more entries will allow mapping more low memory. This
926 can be useful in optimizing the layout of kernel virtual memory.
928 Say N here unless you know what you are doing.
930 config LOWMEM_CAM_NUM
932 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
935 config DYNAMIC_MEMSTART
936 bool "Enable page aligned dynamic load address for kernel"
937 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
938 select NONSTATIC_KERNEL
940 This option enables the kernel to be loaded at any page aligned
941 physical address. The kernel creates a mapping from KERNELBASE to
942 the address where the kernel is loaded. The page size here implies
943 the TLB page size of the mapping for kernel on the particular platform.
944 Please refer to the init code for finding the TLB page size.
946 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
947 kernel image, where the only restriction is the page aligned kernel
948 load address. When this option is enabled, the compile time physical
949 address CONFIG_PHYSICAL_START is ignored.
951 This option is overridden by CONFIG_RELOCATABLE
954 bool "Build a relocatable kernel"
955 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
956 select NONSTATIC_KERNEL
958 This builds a kernel image that is capable of running at the
959 location the kernel is loaded at, without any alignment restrictions.
960 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
962 One use is for the kexec on panic case where the recovery kernel
963 must live at a different physical address than the primary
966 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
967 it has been loaded at and the compile time physical addresses
968 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
969 setting can still be useful to bootwrappers that need to know the
970 load address of the kernel (eg. u-boot/mkimage).
972 config RELOCATABLE_PPC32
974 depends on PPC32 && RELOCATABLE
976 config PAGE_OFFSET_BOOL
977 bool "Set custom page offset address"
978 depends on ADVANCED_OPTIONS
980 This option allows you to set the kernel virtual address at which
981 the kernel will map low memory. This can be useful in optimizing
982 the virtual memory layout of the system.
984 Say N here unless you know what you are doing.
987 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
990 config KERNEL_START_BOOL
991 bool "Set custom kernel base address"
992 depends on ADVANCED_OPTIONS
994 This option allows you to set the kernel virtual address at which
995 the kernel will be loaded. Normally this should match PAGE_OFFSET
996 however there are times (like kdump) that one might not want them
999 Say N here unless you know what you are doing.
1002 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1003 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1004 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1005 default "0xc0000000"
1007 config PHYSICAL_START_BOOL
1008 bool "Set physical address where the kernel is loaded"
1009 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1011 This gives the physical address where the kernel is loaded.
1013 Say N here unless you know what you are doing.
1015 config PHYSICAL_START
1016 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1017 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1018 default "0x00000000"
1020 config PHYSICAL_ALIGN
1022 default "0x04000000" if FSL_BOOKE
1024 This value puts the alignment restrictions on physical address
1025 where kernel is loaded and run from. Kernel is compiled for an
1026 address which meets above alignment restriction.
1028 config TASK_SIZE_BOOL
1029 bool "Set custom user task size"
1030 depends on ADVANCED_OPTIONS
1032 This option allows you to set the amount of virtual address space
1033 allocated to user tasks. This can be useful in optimizing the
1034 virtual memory layout of the system.
1036 Say N here unless you know what you are doing.
1039 hex "Size of user task space" if TASK_SIZE_BOOL
1040 default "0x80000000" if PPC_8xx
1041 default "0xc0000000"
1043 config CONSISTENT_SIZE_BOOL
1044 bool "Set custom consistent memory pool size"
1045 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1047 This option allows you to set the size of the
1048 consistent memory pool. This pool of virtual memory
1049 is used to make consistent memory allocations.
1051 config CONSISTENT_SIZE
1052 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1053 default "0x00200000" if NOT_COHERENT_CACHE
1056 bool "Pinned Kernel TLBs (860 ONLY)"
1057 depends on ADVANCED_OPTIONS && 8xx
1062 bool "Build a relocatable kernel"
1063 depends on !COMPILE_TEST
1064 select NONSTATIC_KERNEL
1066 This builds a kernel image that is capable of running anywhere
1067 in the RMA (real memory area) at any 16k-aligned base address.
1068 The kernel is linked as a position-independent executable (PIE)
1069 and contains dynamic relocations which are processed early
1070 in the bootup process.
1072 One use is for the kexec on panic case where the recovery kernel
1073 must live at a different physical address than the primary
1076 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1079 default "0xc000000000000000"
1082 default "0xc000000000000000"
1083 config PHYSICAL_START
1085 default "0x00000000"
1091 source "net/Kconfig"
1093 source "drivers/Kconfig"
1097 source "lib/Kconfig"
1099 source "arch/powerpc/Kconfig.debug"
1101 source "security/Kconfig"
1105 depends on COMPAT && KEYS
1108 source "crypto/Kconfig"
1110 config PPC_LIB_RHEAP
1113 source "arch/powerpc/kvm/Kconfig"
1115 source "kernel/livepatch/Kconfig"