ea55bf2912
Some System p configurations can already have more than 16 nodes so we
need to increase NODES_SHIFT. I chose 256 to give us some room to grow in the
future, although we can look at something smaller if the memory bloat is
considered too much.
Unless we clamp MAX_ACTIVE_REGIONS we end up with 300kB of extra bloat in
early_node_map in mm/page_alloc.c:
< 6144 early_node_map
> 307200 early_node_map
due to:
#if MAX_NUMNODES >= 32
/* If there can be many nodes, allow up to 50 holes per node */
#define MAX_ACTIVE_REGIONS (MAX_NUMNODES*50)
#else
/* By default, allow up to 256 distinct regions */
#define MAX_ACTIVE_REGIONS 256
Since our memory is mostly contiguous it seems reasonable to keep this
at 256 for now. I also set 32bit to 32 to save space (is there any chance
a 32bit system will have more than 32 discontiguous memory ranges?).
Even with that fixed we have a few data structures that grow:
< 896 bootmem_node_data
> 14336 bootmem_node_data
< 1280 node_devices
> 20480 node_devices
< 25088 kmalloc_caches
> 59648 kmalloc_caches
< 1632 hstates
> 21792 hstates
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
960 lines
24 KiB
Plaintext
960 lines
24 KiB
Plaintext
# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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mainmenu "Linux/PowerPC Kernel Configuration"
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source "arch/powerpc/platforms/Kconfig.cputype"
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config PPC32
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bool
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default y if !PPC64
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config 64BIT
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bool
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default y if PPC64
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config WORD_SIZE
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int
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default 64 if PPC64
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default 32 if !PPC64
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config ARCH_PHYS_ADDR_T_64BIT
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def_bool PPC64 || PHYS_64BIT
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config MMU
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bool
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default y
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config GENERIC_CMOS_UPDATE
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def_bool y
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config GENERIC_TIME
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def_bool y
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config GENERIC_TIME_VSYSCALL
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def_bool y
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config GENERIC_CLOCKEVENTS
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def_bool y
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config GENERIC_HARDIRQS
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bool
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default y
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config GENERIC_HARDIRQS_NO__DO_IRQ
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bool
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default y
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config HAVE_SETUP_PER_CPU_AREA
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def_bool PPC64
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config NEED_PER_CPU_EMBED_FIRST_CHUNK
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def_bool PPC64
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config IRQ_PER_CPU
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bool
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default y
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config STACKTRACE_SUPPORT
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bool
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default y
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config HAVE_LATENCYTOP_SUPPORT
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def_bool y
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config TRACE_IRQFLAGS_SUPPORT
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bool
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default y
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config LOCKDEP_SUPPORT
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default y
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config GENERIC_LOCKBREAK
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bool
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default y
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depends on SMP && PREEMPT
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config ARCH_HAS_ILOG2_U32
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bool
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default y
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config ARCH_HAS_ILOG2_U64
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bool
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default y if 64BIT
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_GPIO
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bool
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help
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Generic GPIO API support
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config ARCH_NO_VIRT_TO_BUS
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def_bool PPC64
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config PPC
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bool
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default y
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_DYNAMIC_FTRACE
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select HAVE_FUNCTION_TRACER
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select HAVE_FUNCTION_GRAPH_TRACER
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select ARCH_WANT_OPTIONAL_GPIOLIB
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select HAVE_IDE
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select HAVE_IOREMAP_PROT
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select HAVE_EFFICIENT_UNALIGNED_ACCESS
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select HAVE_KPROBES
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select HAVE_ARCH_KGDB
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select HAVE_KRETPROBES
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select HAVE_ARCH_TRACEHOOK
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select HAVE_LMB
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select HAVE_DMA_ATTRS
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select HAVE_DMA_API_DEBUG
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select USE_GENERIC_SMP_HELPERS if SMP
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select HAVE_OPROFILE
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select HAVE_SYSCALL_WRAPPERS if PPC64
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select GENERIC_ATOMIC64 if PPC32
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select HAVE_PERF_EVENTS
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config EARLY_PRINTK
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bool
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default y
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config COMPAT
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bool
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default y if PPC64
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select COMPAT_BINFMT_ELF
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config SYSVIPC_COMPAT
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bool
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depends on COMPAT && SYSVIPC
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default y
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# All PPC32s use generic nvram driver through ppc_md
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config GENERIC_NVRAM
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bool
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default y if PPC32
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config SCHED_OMIT_FRAME_POINTER
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bool
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default y
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config ARCH_MAY_HAVE_PC_FDC
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bool
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default !PPC_PSERIES || PCI
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config PPC_OF
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def_bool y
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config OF
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def_bool y
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config PPC_UDBG_16550
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bool
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default n
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config GENERIC_TBSYNC
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bool
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default y if PPC32 && SMP
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default n
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config AUDIT_ARCH
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bool
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default y
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config GENERIC_BUG
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bool
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default y
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depends on BUG
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config SYS_SUPPORTS_APM_EMULATION
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default y if PMAC_APM_EMU
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bool
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config DTC
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bool
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default y
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config DEFAULT_UIMAGE
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bool
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help
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Used to allow a board to specify it wants a uImage built by default
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default n
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config REDBOOT
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bool
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config HIBERNATE_32
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bool
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depends on (PPC_PMAC && !SMP) || BROKEN
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default y
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config HIBERNATE_64
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bool
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depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
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default y
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config ARCH_HIBERNATION_POSSIBLE
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bool
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depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
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default y
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config ARCH_SUSPEND_POSSIBLE
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def_bool y
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depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
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config PPC_DCR_NATIVE
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bool
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default n
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config PPC_DCR_MMIO
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bool
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default n
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config PPC_DCR
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bool
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depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
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default y
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config PPC_OF_PLATFORM_PCI
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bool
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depends on PCI
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depends on PPC64 # not supported on 32 bits yet
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default n
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config ARCH_SUPPORTS_DEBUG_PAGEALLOC
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def_bool y
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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source "arch/powerpc/sysdev/Kconfig"
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source "arch/powerpc/platforms/Kconfig"
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menu "Kernel options"
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config HIGHMEM
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bool "High memory support"
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depends on PPC32
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source kernel/time/Kconfig
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source kernel/Kconfig.hz
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source kernel/Kconfig.preempt
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source "fs/Kconfig.binfmt"
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config HUGETLB_PAGE_SIZE_VARIABLE
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bool
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depends on HUGETLB_PAGE
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default y
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config MATH_EMULATION
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bool "Math emulation"
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depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
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---help---
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Some PowerPC chips designed for embedded applications do not have
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a floating-point unit and therefore do not implement the
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floating-point instructions in the PowerPC instruction set. If you
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say Y here, the kernel will include code to emulate a floating-point
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unit, which will allow programs that use floating-point
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instructions to run.
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config 8XX_MINIMAL_FPEMU
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bool "Minimal math emulation for 8xx"
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depends on 8xx && !MATH_EMULATION
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help
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Older arch/ppc kernels still emulated a few floating point
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instructions such as load and store, even when full math
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emulation is disabled. Say "Y" here if you want to preserve
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this behavior.
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It is recommended that you build a soft-float userspace instead.
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config IOMMU_VMERGE
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bool "Enable IOMMU virtual merging"
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depends on PPC64
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default y
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help
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Cause IO segments sent to a device for DMA to be merged virtually
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by the IOMMU when they happen to have been allocated contiguously.
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This doesn't add pressure to the IOMMU allocator. However, some
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drivers don't support getting large merged segments coming back
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from *_map_sg().
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Most drivers don't have this problem; it is safe to say Y here.
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config IOMMU_HELPER
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def_bool PPC64
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config SWIOTLB
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bool "SWIOTLB support"
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default n
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select IOMMU_HELPER
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---help---
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Support for IO bounce buffering for systems without an IOMMU.
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This allows us to DMA to the full physical address space on
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platforms where the size of a physical address is larger
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than the bus address. Not all platforms support this.
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config HOTPLUG_CPU
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bool "Support for enabling/disabling CPUs"
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depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
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---help---
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Say Y here to be able to disable and re-enable individual
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CPUs at runtime on SMP machines.
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Say N if you are unsure.
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config ARCH_ENABLE_MEMORY_HOTPLUG
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def_bool y
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config ARCH_HAS_WALK_MEMORY
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def_bool y
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config ARCH_ENABLE_MEMORY_HOTREMOVE
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def_bool y
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config KEXEC
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bool "kexec system call (EXPERIMENTAL)"
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depends on PPC_BOOK3S && EXPERIMENTAL
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help
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kexec is a system call that implements the ability to shutdown your
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current kernel, and to start another kernel. It is like a reboot
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but it is independent of the system firmware. And like a reboot
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you can start any kernel with it, not just Linux.
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The name comes from the similarity to the exec system call.
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It is an ongoing process to be certain the hardware in a machine
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is properly shutdown, so do not be surprised if this code does not
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initially work for you. It may help to enable device hotplugging
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support. As of this writing the exact hardware interface is
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strongly in flux, so no good recommendation can be made.
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config CRASH_DUMP
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bool "Build a kdump crash kernel"
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depends on PPC64 || 6xx
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select RELOCATABLE if PPC64
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help
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Build a kernel suitable for use as a kdump capture kernel.
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The same kernel binary can be used as production kernel and dump
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capture kernel.
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config PHYP_DUMP
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bool "Hypervisor-assisted dump (EXPERIMENTAL)"
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depends on PPC_PSERIES && EXPERIMENTAL
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help
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Hypervisor-assisted dump is meant to be a kdump replacement
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offering robustness and speed not possible without system
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hypervisor assistance.
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If unsure, say "N"
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config PPCBUG_NVRAM
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bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
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default y if PPC_PREP
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config IRQ_ALL_CPUS
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bool "Distribute interrupts on all CPUs by default"
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depends on SMP && !MV64360
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help
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This option gives the kernel permission to distribute IRQs across
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multiple CPUs. Saying N here will route all IRQs to the first
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CPU. Generally saying Y is safe, although some problems have been
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reported with SMP Power Macintoshes with this option enabled.
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config NUMA
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bool "NUMA support"
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depends on PPC64
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default y if SMP && PPC_PSERIES
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config NODES_SHIFT
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int
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default "8" if PPC64
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default "4"
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depends on NEED_MULTIPLE_NODES
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config MAX_ACTIVE_REGIONS
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int
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default "256" if PPC64
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default "32"
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config ARCH_SELECT_MEMORY_MODEL
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def_bool y
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depends on PPC64
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config ARCH_FLATMEM_ENABLE
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def_bool y
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depends on (PPC64 && !NUMA) || PPC32
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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depends on PPC64
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select SPARSEMEM_VMEMMAP_ENABLE
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config ARCH_SPARSEMEM_DEFAULT
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def_bool y
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depends on (SMP && PPC_PSERIES) || PPC_PS3
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config ARCH_POPULATES_NODE_MAP
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def_bool y
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source "mm/Kconfig"
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config ARCH_MEMORY_PROBE
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def_bool y
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depends on MEMORY_HOTPLUG
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# Some NUMA nodes have memory ranges that span
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# other nodes. Even though a pfn is valid and
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# between a node's start and end pfns, it may not
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# reside on that node. See memmap_init_zone()
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# for details.
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config NODES_SPAN_OTHER_NODES
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def_bool y
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depends on NEED_MULTIPLE_NODES
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config PPC_HAS_HASH_64K
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bool
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depends on PPC64
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default n
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config STDBINUTILS
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bool "Using standard binutils settings"
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depends on 44x
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default y
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help
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Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
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Note, that kernel will be able to run only those applications,
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which had been compiled using binutils later than 2.17.50.0.3 with
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'-zmax-page-size' set to 256K (the default is 64K). Or, if using
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the older binutils, you can patch them with a trivial patch, which
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changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
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choice
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prompt "Page size"
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default PPC_4K_PAGES
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help
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Select the kernel logical page size. Increasing the page size
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will reduce software overhead at each page boundary, allow
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hardware prefetch mechanisms to be more effective, and allow
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larger dma transfers increasing IO efficiency and reducing
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overhead. However the utilization of memory will increase.
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For example, each cached file will using a multiple of the
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page size to hold its contents and the difference between the
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end of file and the end of page is wasted.
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Some dedicated systems, such as software raid serving with
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accelerated calculations, have shown significant increases.
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If you configure a 64 bit kernel for 64k pages but the
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processor does not support them, then the kernel will simulate
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them with 4k pages, loading them on demand, but with the
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reduced software overhead and larger internal fragmentation.
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For the 32 bit kernel, a large page option will not be offered
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unless it is supported by the configured processor.
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If unsure, choose 4K_PAGES.
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config PPC_4K_PAGES
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bool "4k page size"
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config PPC_16K_PAGES
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bool "16k page size" if 44x
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config PPC_64K_PAGES
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bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
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select PPC_HAS_HASH_64K if PPC_STD_MMU_64
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config PPC_256K_PAGES
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bool "256k page size" if 44x
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depends on !STDBINUTILS
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help
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Make the page size 256k.
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As the ELF standard only requires alignment to support page
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sizes up to 64k, you will need to compile all of your user
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space applications with a non-standard binutils settings
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(see the STDBINUTILS description for details).
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Say N unless you know what you are doing.
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endchoice
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config FORCE_MAX_ZONEORDER
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int "Maximum zone order"
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range 9 64 if PPC64 && PPC_64K_PAGES
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default "9" if PPC64 && PPC_64K_PAGES
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range 13 64 if PPC64 && !PPC_64K_PAGES
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default "13" if PPC64 && !PPC_64K_PAGES
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range 9 64 if PPC32 && PPC_16K_PAGES
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default "9" if PPC32 && PPC_16K_PAGES
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range 7 64 if PPC32 && PPC_64K_PAGES
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default "7" if PPC32 && PPC_64K_PAGES
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range 5 64 if PPC32 && PPC_256K_PAGES
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default "5" if PPC32 && PPC_256K_PAGES
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range 11 64
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default "11"
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help
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The kernel memory allocator divides physically contiguous memory
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blocks into "zones", where each zone is a power of two number of
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pages. This option selects the largest power of two that the kernel
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keeps in the memory allocator. If you need to allocate very large
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blocks of physically contiguous memory, then you may need to
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increase this value.
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This config option is actually maximum order plus one. For example,
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a value of 11 means that the largest free memory block is 2^10 pages.
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The page size is not necessarily 4KB. For example, on 64-bit
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systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
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this in mind when choosing a value for this option.
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config PPC_SUBPAGE_PROT
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bool "Support setting protections for 4k subpages"
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depends on PPC_STD_MMU_64 && PPC_64K_PAGES
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help
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This option adds support for a system call to allow user programs
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to set access permissions (read/write, readonly, or no access)
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on the 4k subpages of each 64k page.
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config SCHED_SMT
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bool "SMT (Hyperthreading) scheduler support"
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depends on PPC64 && SMP
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help
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SMT scheduler support improves the CPU scheduler's decision making
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when dealing with POWER5 cpus at a cost of slightly increased
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overhead in some places. If unsure say N here.
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config PROC_DEVICETREE
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bool "Support for device tree in /proc"
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depends on PROC_FS
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help
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This option adds a device-tree directory under /proc which contains
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an image of the device tree that the kernel copies from Open
|
|
Firmware or other boot firmware. If unsure, say Y here.
|
|
|
|
config CMDLINE_BOOL
|
|
bool "Default bootloader kernel arguments"
|
|
|
|
config CMDLINE
|
|
string "Initial kernel command string"
|
|
depends on CMDLINE_BOOL
|
|
default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
|
|
help
|
|
On some platforms, there is currently no way for the boot loader to
|
|
pass arguments to the kernel. For these platforms, you can supply
|
|
some command-line options at build time by entering them here. In
|
|
most cases you will need to specify the root device here.
|
|
|
|
config EXTRA_TARGETS
|
|
string "Additional default image types"
|
|
help
|
|
List additional targets to be built by the bootwrapper here (separated
|
|
by spaces). This is useful for targets that depend of device tree
|
|
files in the .dts directory.
|
|
|
|
Targets in this list will be build as part of the default build
|
|
target, or when the user does a 'make zImage' or a
|
|
'make zImage.initrd'.
|
|
|
|
If unsure, leave blank
|
|
|
|
if !44x || BROKEN
|
|
config ARCH_WANTS_FREEZER_CONTROL
|
|
def_bool y
|
|
depends on ADB_PMU
|
|
|
|
source kernel/power/Kconfig
|
|
endif
|
|
|
|
config SECCOMP
|
|
bool "Enable seccomp to safely compute untrusted bytecode"
|
|
depends on PROC_FS
|
|
default y
|
|
help
|
|
This kernel feature is useful for number crunching applications
|
|
that may need to compute untrusted bytecode during their
|
|
execution. By using pipes or other transports made available to
|
|
the process as file descriptors supporting the read/write
|
|
syscalls, it's possible to isolate those applications in
|
|
their own address space using seccomp. Once seccomp is
|
|
enabled via /proc/<pid>/seccomp, it cannot be disabled
|
|
and the task is only allowed to execute a few safe syscalls
|
|
defined by each seccomp mode.
|
|
|
|
If unsure, say Y. Only embedded should say N here.
|
|
|
|
endmenu
|
|
|
|
config ISA_DMA_API
|
|
bool
|
|
default !PPC_ISERIES || PCI
|
|
|
|
menu "Bus options"
|
|
|
|
config ISA
|
|
bool "Support for ISA-bus hardware"
|
|
depends on PPC_PREP || PPC_CHRP
|
|
select PPC_I8259
|
|
help
|
|
Find out whether you have ISA slots on your motherboard. ISA is the
|
|
name of a bus system, i.e. the way the CPU talks to the other stuff
|
|
inside your box. If you have an Apple machine, say N here; if you
|
|
have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
|
|
you have an embedded board, consult your board documentation.
|
|
|
|
config ZONE_DMA
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_ISA_DMA
|
|
bool
|
|
depends on PPC64 || POWER4 || 6xx && !CPM2
|
|
default y
|
|
|
|
config PPC_INDIRECT_PCI
|
|
bool
|
|
depends on PCI
|
|
default y if 40x || 44x
|
|
default n
|
|
|
|
config EISA
|
|
bool
|
|
|
|
config SBUS
|
|
bool
|
|
|
|
config FSL_SOC
|
|
bool
|
|
|
|
config FSL_PCI
|
|
bool
|
|
select PPC_INDIRECT_PCI
|
|
select PCI_QUIRKS
|
|
|
|
config 4xx_SOC
|
|
bool
|
|
|
|
config FSL_LBC
|
|
bool
|
|
help
|
|
Freescale Localbus support
|
|
|
|
config FSL_GTM
|
|
bool
|
|
depends on PPC_83xx || QUICC_ENGINE || CPM2
|
|
help
|
|
Freescale General-purpose Timers support
|
|
|
|
# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
|
|
config MCA
|
|
bool
|
|
|
|
# Platforms that what PCI turned unconditionally just do select PCI
|
|
# in their config node. Platforms that want to choose at config
|
|
# time should select PPC_PCI_CHOICE
|
|
config PPC_PCI_CHOICE
|
|
bool
|
|
|
|
config PCI
|
|
bool "PCI support" if PPC_PCI_CHOICE
|
|
default y if !40x && !CPM2 && !8xx && !PPC_83xx \
|
|
&& !PPC_85xx && !PPC_86xx
|
|
default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
|
|
default PCI_QSPAN if !4xx && !CPM2 && 8xx
|
|
select ARCH_SUPPORTS_MSI
|
|
help
|
|
Find out whether your system includes a PCI bus. PCI is the name of
|
|
a bus system, i.e. the way the CPU talks to the other stuff inside
|
|
your box. If you say Y here, the kernel will include drivers and
|
|
infrastructure code to support PCI bus devices.
|
|
|
|
config PCI_DOMAINS
|
|
def_bool PCI
|
|
|
|
config PCI_SYSCALL
|
|
def_bool PCI
|
|
|
|
config PCI_QSPAN
|
|
bool "QSpan PCI"
|
|
depends on !4xx && !CPM2 && 8xx
|
|
select PPC_I8259
|
|
help
|
|
Say Y here if you have a system based on a Motorola 8xx-series
|
|
embedded processor with a QSPAN PCI interface, otherwise say N.
|
|
|
|
config PCI_8260
|
|
bool
|
|
depends on PCI && 8260
|
|
select PPC_INDIRECT_PCI
|
|
default y
|
|
|
|
config 8260_PCI9
|
|
bool "Enable workaround for MPC826x erratum PCI 9"
|
|
depends on PCI_8260 && !8272
|
|
default y
|
|
|
|
choice
|
|
prompt "IDMA channel for PCI 9 workaround"
|
|
depends on 8260_PCI9
|
|
|
|
config 8260_PCI9_IDMA1
|
|
bool "IDMA1"
|
|
|
|
config 8260_PCI9_IDMA2
|
|
bool "IDMA2"
|
|
|
|
config 8260_PCI9_IDMA3
|
|
bool "IDMA3"
|
|
|
|
config 8260_PCI9_IDMA4
|
|
bool "IDMA4"
|
|
|
|
endchoice
|
|
|
|
source "drivers/pci/pcie/Kconfig"
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
|
|
config HAS_RAPIDIO
|
|
bool
|
|
default n
|
|
|
|
config RAPIDIO
|
|
bool "RapidIO support"
|
|
depends on HAS_RAPIDIO
|
|
help
|
|
If you say Y here, the kernel will include drivers and
|
|
infrastructure code to support RapidIO interconnect devices.
|
|
|
|
source "drivers/rapidio/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Advanced setup"
|
|
depends on PPC32
|
|
|
|
config ADVANCED_OPTIONS
|
|
bool "Prompt for advanced kernel configuration options"
|
|
help
|
|
This option will enable prompting for a variety of advanced kernel
|
|
configuration options. These options can cause the kernel to not
|
|
work if they are set incorrectly, but can be used to optimize certain
|
|
aspects of kernel memory management.
|
|
|
|
Unless you know what you are doing, say N here.
|
|
|
|
comment "Default settings for advanced configuration options are used"
|
|
depends on !ADVANCED_OPTIONS
|
|
|
|
config LOWMEM_SIZE_BOOL
|
|
bool "Set maximum low memory"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the maximum amount of memory which
|
|
will be used as "low memory", that is, memory which the kernel can
|
|
access directly, without having to set up a kernel virtual mapping.
|
|
This can be useful in optimizing the layout of kernel virtual
|
|
memory.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config LOWMEM_SIZE
|
|
hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
|
|
default "0x30000000"
|
|
|
|
config LOWMEM_CAM_NUM_BOOL
|
|
bool "Set number of CAMs to use to map low memory"
|
|
depends on ADVANCED_OPTIONS && FSL_BOOKE
|
|
help
|
|
This option allows you to set the maximum number of CAM slots that
|
|
will be used to map low memory. There are a limited number of slots
|
|
available and even more limited number that will fit in the L1 MMU.
|
|
However, using more entries will allow mapping more low memory. This
|
|
can be useful in optimizing the layout of kernel virtual memory.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config LOWMEM_CAM_NUM
|
|
depends on FSL_BOOKE
|
|
int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
|
|
default 3
|
|
|
|
config RELOCATABLE
|
|
bool "Build a relocatable kernel (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
|
|
help
|
|
This builds a kernel image that is capable of running at the
|
|
location the kernel is loaded at (some alignment restrictions may
|
|
exist).
|
|
|
|
One use is for the kexec on panic case where the recovery kernel
|
|
must live at a different physical address than the primary
|
|
kernel.
|
|
|
|
Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
|
|
it has been loaded at and the compile time physical addresses
|
|
CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
|
|
setting can still be useful to bootwrappers that need to know the
|
|
load location of the kernel (eg. u-boot/mkimage).
|
|
|
|
config PAGE_OFFSET_BOOL
|
|
bool "Set custom page offset address"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the kernel virtual address at which
|
|
the kernel will map low memory. This can be useful in optimizing
|
|
the virtual memory layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config PAGE_OFFSET
|
|
hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
|
|
default "0xc0000000"
|
|
|
|
config KERNEL_START_BOOL
|
|
bool "Set custom kernel base address"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the kernel virtual address at which
|
|
the kernel will be loaded. Normally this should match PAGE_OFFSET
|
|
however there are times (like kdump) that one might not want them
|
|
to be the same.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config KERNEL_START
|
|
hex "Virtual address of kernel base" if KERNEL_START_BOOL
|
|
default PAGE_OFFSET if PAGE_OFFSET_BOOL
|
|
default "0xc2000000" if CRASH_DUMP
|
|
default "0xc0000000"
|
|
|
|
config PHYSICAL_START_BOOL
|
|
bool "Set physical address where the kernel is loaded"
|
|
depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
|
|
help
|
|
This gives the physical address where the kernel is loaded.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config PHYSICAL_START
|
|
hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
|
|
default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
|
|
default "0x00000000"
|
|
|
|
config PHYSICAL_ALIGN
|
|
hex
|
|
default "0x04000000" if FSL_BOOKE
|
|
help
|
|
This value puts the alignment restrictions on physical address
|
|
where kernel is loaded and run from. Kernel is compiled for an
|
|
address which meets above alignment restriction.
|
|
|
|
config TASK_SIZE_BOOL
|
|
bool "Set custom user task size"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the amount of virtual address space
|
|
allocated to user tasks. This can be useful in optimizing the
|
|
virtual memory layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config TASK_SIZE
|
|
hex "Size of user task space" if TASK_SIZE_BOOL
|
|
default "0x80000000" if PPC_PREP || PPC_8xx
|
|
default "0xc0000000"
|
|
|
|
config CONSISTENT_SIZE_BOOL
|
|
bool "Set custom consistent memory pool size"
|
|
depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
|
|
help
|
|
This option allows you to set the size of the
|
|
consistent memory pool. This pool of virtual memory
|
|
is used to make consistent memory allocations.
|
|
|
|
config CONSISTENT_SIZE
|
|
hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
|
|
default "0x00200000" if NOT_COHERENT_CACHE
|
|
|
|
config PIN_TLB
|
|
bool "Pinned Kernel TLBs (860 ONLY)"
|
|
depends on ADVANCED_OPTIONS && 8xx
|
|
endmenu
|
|
|
|
if PPC64
|
|
config RELOCATABLE
|
|
bool "Build a relocatable kernel"
|
|
help
|
|
This builds a kernel image that is capable of running anywhere
|
|
in the RMA (real memory area) at any 16k-aligned base address.
|
|
The kernel is linked as a position-independent executable (PIE)
|
|
and contains dynamic relocations which are processed early
|
|
in the bootup process.
|
|
|
|
One use is for the kexec on panic case where the recovery kernel
|
|
must live at a different physical address than the primary
|
|
kernel.
|
|
|
|
config PAGE_OFFSET
|
|
hex
|
|
default "0xc000000000000000"
|
|
config KERNEL_START
|
|
hex
|
|
default "0xc000000000000000"
|
|
config PHYSICAL_START
|
|
hex
|
|
default "0x00000000"
|
|
endif
|
|
|
|
source "net/Kconfig"
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "arch/powerpc/sysdev/qe_lib/Kconfig"
|
|
|
|
source "lib/Kconfig"
|
|
|
|
source "arch/powerpc/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
config KEYS_COMPAT
|
|
bool
|
|
depends on COMPAT && KEYS
|
|
default y
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
config PPC_CLOCK
|
|
bool
|
|
default n
|
|
select HAVE_CLK
|
|
|
|
config PPC_LIB_RHEAP
|
|
bool
|
|
|
|
source "arch/powerpc/kvm/Kconfig"
|