linux/arch/ppc64/Kconfig

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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
config 64BIT
def_bool y
config MMU
bool
default y
config UID16
bool
config RWSEM_GENERIC_SPINLOCK
bool
config RWSEM_XCHGADD_ALGORITHM
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_ISA_DMA
bool
default y
config HAVE_DEC_LOCK
bool
default y
config EARLY_PRINTK
bool
default y
config COMPAT
bool
default y
config SCHED_NO_NO_OMIT_FRAME_POINTER
bool
default y
# We optimistically allocate largepages from the VM, so make the limit
# large enough (16MB). This badly named config option is actually
# max order + 1
config FORCE_MAX_ZONEORDER
int
default "13"
source "init/Kconfig"
config SYSVIPC_COMPAT
bool
depends on COMPAT && SYSVIPC
default y
menu "Platform support"
choice
prompt "Platform Type"
default PPC_MULTIPLATFORM
config PPC_ISERIES
bool "IBM Legacy iSeries"
config PPC_MULTIPLATFORM
bool "Generic"
endchoice
config PPC_PSERIES
depends on PPC_MULTIPLATFORM
bool " IBM pSeries & new iSeries"
default y
config PPC_BPA
bool " Broadband Processor Architecture"
depends on PPC_MULTIPLATFORM
config PPC_PMAC
depends on PPC_MULTIPLATFORM
bool " Apple G5 based machines"
default y
select U3_DART
config PPC_MAPLE
depends on PPC_MULTIPLATFORM
bool " Maple 970FX Evaluation Board"
select U3_DART
select MPIC_BROKEN_U3
default n
help
This option enables support for the Maple 970FX Evaluation Board.
For more informations, refer to <http://www.970eval.com>
config PPC
bool
default y
config PPC64
bool
default y
config PPC_OF
depends on PPC_MULTIPLATFORM
bool
default y
config XICS
depends on PPC_PSERIES
bool
default y
config MPIC
depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
bool
default y
config BPA_IIC
depends on PPC_BPA
bool
default y
# VMX is pSeries only for now until somebody writes the iSeries
# exception vectors for it
config ALTIVEC
bool "Support for VMX (Altivec) vector unit"
depends on PPC_MULTIPLATFORM
default y
config PPC_SPLPAR
depends on PPC_PSERIES
bool "Support for shared-processor logical partitions"
default n
help
Enabling this option will make the kernel run more efficiently
on logically-partitioned pSeries systems which use shared
processors, that is, which share physical processors between
two or more partitions.
[PATCH] ppc64: kexec support for ppc64 This patch implements the kexec support for ppc64 platforms. A couple of notes: 1) We copy the pages in virtual mode, using the full base kernel and a statically allocated stack. At kexec_prepare time we scan the pages and if any overlap our (0, _end[]) range we return -ETXTBSY. On PowerPC 64 systems running in LPAR (logical partitioning) mode, only a small region of memory, referred to as the RMO, can be accessed in real mode. Since Linux runs with only one zone of memory in the memory allocator, and it can be orders of magnitude more memory than the RMO, looping until we allocate pages in the source region is not feasible. Copying in virtual means we don't have to write a hash table generation and call hypervisor to insert translations, instead we rely on the pinned kernel linear mapping. The kernel already has move to linked location built in, so there is no requirement to load it at 0. If we want to load something other than a kernel, then a stub can be written to copy a linear chunk in real mode. 2) The start entry point gets passed parameters from the kernel. Slaves are started at a fixed address after copying code from the entry point. All CPUs get passed their firmware assigned physical id in r3 (most calling conventions use this register for the first argument). This is used to distinguish each CPU from all other CPUs. Since firmware is not around, there is no other way to obtain this information other than to pass it somewhere. A single CPU, referred to here as the master and the one executing the kexec call, branches to start with the address of start in r4. While this can be calculated, we have to load it through a gpr to branch to this point so defining the register this is contained in is free. A stack of unspecified size is available at r1 (also common calling convention). All remaining running CPUs are sent to start at absolute address 0x60 after copying the first 0x100 bytes from start to address 0. This convention was chosen because it matches what the kernel has been doing itself. (only gpr3 is defined). Note: This is not quite the convention of the kexec bootblock v2 in the kernel. A stub has been written to convert between them, and we may adjust the kernel in the future to allow this directly without any stub. 3) Destination pages can be placed anywhere, even where they would not be accessible in real mode. This will allow us to place ram disks above the RMO if we choose. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: R Sharada <sharada@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-25 21:58:10 +00:00
config KEXEC
bool "kexec system call (EXPERIMENTAL)"
depends on PPC_MULTIPLATFORM && EXPERIMENTAL
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
but it is indepedent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
The name comes from the similiarity to the exec system call.
It is an ongoing process to be certain the hardware in a machine
is properly shutdown, so do not be surprised if this code does not
initially work for you. It may help to enable device hotplugging
support. As of this writing the exact hardware interface is
strongly in flux, so no good recommendation can be made.
config IBMVIO
depends on PPC_PSERIES || PPC_ISERIES
bool
default y
config U3_DART
bool
depends on PPC_MULTIPLATFORM
default n
config MPIC_BROKEN_U3
bool
depends on PPC_MAPLE
default y
config PPC_PMAC64
bool
depends on PPC_PMAC
default y
config BOOTX_TEXT
bool "Support for early boot text console"
depends PPC_OF
help
Say Y here to see progress messages from the boot firmware in text
mode. Requires an Open Firmware compatible video card.
config POWER4_ONLY
bool "Optimize for POWER4"
default n
---help---
Cause the compiler to optimize for POWER4 processors. The resulting
binary will not work on POWER3 or RS64 processors when compiled with
binutils 2.15 or later.
config IOMMU_VMERGE
bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
depends on EXPERIMENTAL
default n
help
Cause IO segments sent to a device for DMA to be merged virtually
by the IOMMU when they happen to have been allocated contiguously.
This doesn't add pressure to the IOMMU allocator. However, some
drivers don't support getting large merged segments coming back
from *_map_sg(). Say Y if you know the drivers you are using are
properly handling this case.
config SMP
bool "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on single-processor machines.
On a single-processor machine, the kernel will run faster if you say
N here.
If you don't know what to do here, say Y.
config NR_CPUS
int "Maximum number of CPUs (2-128)"
range 2 128
depends on SMP
default "32"
config HMT
bool "Hardware multithreading"
depends on SMP && PPC_PSERIES && BROKEN
help
This option enables hardware multithreading on RS64 cpus.
pSeries systems p620 and p660 have such a cpu type.
config ARCH_SELECT_MEMORY_MODEL
def_bool y
config ARCH_FLATMEM_ENABLE
def_bool y
depends on !NUMA
config ARCH_DISCONTIGMEM_ENABLE
def_bool y
depends on SMP && PPC_PSERIES
config ARCH_DISCONTIGMEM_DEFAULT
def_bool y
depends on ARCH_DISCONTIGMEM_ENABLE
config ARCH_FLATMEM_ENABLE
def_bool y
config ARCH_SPARSEMEM_ENABLE
def_bool y
depends on ARCH_DISCONTIGMEM_ENABLE
source "mm/Kconfig"
config HAVE_ARCH_EARLY_PFN_TO_NID
def_bool y
depends on NEED_MULTIPLE_NODES
[PATCH] sparsemem swiss cheese numa layouts The part of the sparsemem patch which modifies memmap_init_zone() has recently become a problem. It changes behavior so that there is a call to pfn_to_page() for each individual page inside of a node's range: node_start_pfn through node_end_pfn. It used to simply do this once, at the beginning of the node, but having sparsemem's non-contiguous mem_map[]s inside of a node made it necessary to change. Mike Kravetz recently wrote a patch which made the NUMA code accept some new kinds of layouts. The system's memory was laid out like this, with node 0's memory in two pieces: one before and one after node 1's memory: Node 0: +++++ +++++ Node 1: +++++ Previous behavior before Mike's patch was to assign nodes like this: Node 0: 00000 XXXXX Node 1: 11111 Where the 'X' areas were simply thrown away. The new behavior was to make the pg_data_t span node 0 across all of its areas, including areas that are really node 1's: Node 0: 000000000000000 Node 1: 11111 This wastes a little bit of mem_map space, but ends up being OK, and more fully utilizes the system's memory. memmap_init_zone() initializes all of the "struct page"s for node 0, even for the "hole", but those never get used, because there is no pfn_to_page() that resolves to those pages. However, only calling pfn_to_page() once, memmap_init_zone() always uses the pages that were allocated for node0->node_mem_map because: struct page *start = pfn_to_page(start_pfn); // effectively start = &node->node_mem_map[0] for (page = start; page < (start + size); page++) { init_page_here();... page++; } Slow, and wasteful, but generally harmless. But, modify that to call pfn_to_page() for each loop iteration (like sparsemem does): for (pfn = start_pfn; pfn < < (start_pfn + size); pfn++++) { page = pfn_to_page(pfn); } And you end up trying to initialize node 1's pages too early, along with bogus data from node 0. This patch checks for those weird layouts and declines to touch the pages, making the more frequent pfn_to_page() calls OK to do. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 07:07:59 +00:00
# Some NUMA nodes have memory ranges that span
# other nodes. Even though a pfn is valid and
# between a node's start and end pfns, it may not
# reside on that node.
#
# This is a relatively temporary hack that should
# be able to go away when sparsemem is fully in
# place
config NODES_SPAN_OTHER_NODES
def_bool y
depends on NEED_MULTIPLE_NODES
config NUMA
bool "NUMA support"
default y if DISCONTIGMEM || SPARSEMEM
config SCHED_SMT
bool "SMT (Hyperthreading) scheduler support"
depends on SMP
default off
help
SMT scheduler support improves the CPU scheduler's decision making
when dealing with POWER5 cpus at a cost of slightly increased
overhead in some places. If unsure say N here.
source "kernel/Kconfig.preempt"
source kernel/Kconfig.hz
config EEH
bool "PCI Extended Error Handling (EEH)" if EMBEDDED
depends on PPC_PSERIES
default y if !EMBEDDED
#
# Use the generic interrupt handling code in kernel/irq/:
#
config GENERIC_HARDIRQS
bool
default y
config MSCHUNKS
bool
depends on PPC_ISERIES
default y
config PPC_RTAS
bool
depends on PPC_PSERIES || PPC_BPA
default y
config RTAS_PROC
bool "Proc interface to RTAS"
depends on PPC_RTAS
default y
config RTAS_FLASH
tristate "Firmware flash interface"
depends on RTAS_PROC
config SCANLOG
tristate "Scanlog dump interface"
depends on RTAS_PROC && PPC_PSERIES
config LPARCFG
tristate "LPAR Configuration Data"
depends on PPC_PSERIES || PPC_ISERIES
help
Provide system capacity information via human readable
<key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
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 y
menu "General setup"
config ISA
bool
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 SBUS
bool
config MCA
bool
config EISA
bool
config PCI
bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
default y
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
bool
default PCI
source "fs/Kconfig.binfmt"
source "drivers/pci/Kconfig"
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
select HOTPLUG
---help---
Say Y here to be able to turn CPUs off and on.
Say N if you are unsure.
source "drivers/pcmcia/Kconfig"
source "drivers/pci/hotplug/Kconfig"
config PROC_DEVICETREE
bool "Support for Open Firmware device tree in /proc"
depends on !PPC_ISERIES
help
This option adds a device-tree directory under /proc which contains
an image of the device tree that the kernel copies from Open
Firmware. If unsure, say Y here.
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
depends on !PPC_ISERIES
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.
endmenu
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
menu "iSeries device drivers"
depends on PPC_ISERIES
config VIOCONS
tristate "iSeries Virtual Console Support"
config VIODASD
tristate "iSeries Virtual I/O disk support"
help
If you are running on an iSeries system and you want to use
virtual disks created and managed by OS/400, say Y.
config VIOCD
tristate "iSeries Virtual I/O CD support"
help
If you are running Linux on an IBM iSeries system and you want to
read a CD drive owned by OS/400, say Y here.
config VIOTAPE
tristate "iSeries Virtual Tape Support"
help
If you are running Linux on an iSeries system and you want Linux
to read and/or write a tape drive owned by OS/400, say Y here.
endmenu
config VIOPATH
bool
depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
default y
source "arch/ppc64/oprofile/Kconfig"
source "arch/ppc64/Kconfig.debug"
source "security/Kconfig"
config KEYS_COMPAT
bool
depends on COMPAT && KEYS
default y
source "crypto/Kconfig"
source "lib/Kconfig"