f14f75b811
This patch contains the ia64 uncached page allocator and the generic allocator (genalloc). The uncached allocator was formerly part of the SN2 mspec driver but there are several other users of it so it has been split off from the driver. The generic allocator can be used by device driver to manage special memory etc. The generic allocator is based on the allocator from the sym53c8xx_2 driver. Various users on ia64 needs uncached memory. The SGI SN architecture requires it for inter-partition communication between partitions within a large NUMA cluster. The specific user for this is the XPC code. Another application is large MPI style applications which use it for synchronization, on SN this can be done using special 'fetchop' operations but it also benefits non SN hardware which may use regular uncached memory for this purpose. Performance of doing this through uncached vs cached memory is pretty substantial. This is handled by the mspec driver which I will push out in a seperate patch. Rather than creating a specific allocator for just uncached memory I came up with genalloc which is a generic purpose allocator that can be used by device drivers and other subsystems as they please. For instance to handle onboard device memory. It was derived from the sym53c7xx_2 driver's allocator which is also an example of a potential user (I am refraining from modifying sym2 right now as it seems to have been under fairly heavy development recently). On ia64 memory has various properties within a granule, ie. it isn't safe to access memory as uncached within the same granule as currently has memory accessed in cached mode. The regular system therefore doesn't utilize memory in the lower granules which is mixed in with device PAL code etc. The uncached driver walks the EFI memmap and pulls out the spill uncached pages and sticks them into the uncached pool. Only after these chunks have been utilized, will it start converting regular cached memory into uncached memory. Hence the reason for the EFI related code additions. Signed-off-by: Jes Sorensen <jes@wildopensource.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
448 lines
12 KiB
Plaintext
448 lines
12 KiB
Plaintext
#
|
|
# For a description of the syntax of this configuration file,
|
|
# see Documentation/kbuild/kconfig-language.txt.
|
|
#
|
|
|
|
mainmenu "IA-64 Linux Kernel Configuration"
|
|
|
|
source "init/Kconfig"
|
|
|
|
menu "Processor type and features"
|
|
|
|
config IA64
|
|
bool
|
|
default y
|
|
help
|
|
The Itanium Processor Family is Intel's 64-bit successor to
|
|
the 32-bit X86 line. The IA-64 Linux project has a home
|
|
page at <http://www.linuxia64.org/> and a mailing list at
|
|
<linux-ia64@vger.kernel.org>.
|
|
|
|
config 64BIT
|
|
bool
|
|
default y
|
|
|
|
config MMU
|
|
bool
|
|
default y
|
|
|
|
config RWSEM_XCHGADD_ALGORITHM
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_CALIBRATE_DELAY
|
|
bool
|
|
default y
|
|
|
|
config TIME_INTERPOLATION
|
|
bool
|
|
default y
|
|
|
|
config EFI
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_IOMAP
|
|
bool
|
|
default y
|
|
|
|
config SCHED_NO_NO_OMIT_FRAME_POINTER
|
|
bool
|
|
default y
|
|
|
|
config IA64_UNCACHED_ALLOCATOR
|
|
bool
|
|
select GENERIC_ALLOCATOR
|
|
|
|
choice
|
|
prompt "System type"
|
|
default IA64_GENERIC
|
|
|
|
config IA64_GENERIC
|
|
bool "generic"
|
|
select NUMA
|
|
select ACPI_NUMA
|
|
select VIRTUAL_MEM_MAP
|
|
select DISCONTIGMEM
|
|
help
|
|
This selects the system type of your hardware. A "generic" kernel
|
|
will run on any supported IA-64 system. However, if you configure
|
|
a kernel for your specific system, it will be faster and smaller.
|
|
|
|
generic For any supported IA-64 system
|
|
DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
|
|
HP-zx1/sx1000 For HP systems
|
|
HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
|
|
SGI-SN2 For SGI Altix systems
|
|
Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
|
|
|
|
If you don't know what to do, choose "generic".
|
|
|
|
config IA64_DIG
|
|
bool "DIG-compliant"
|
|
|
|
config IA64_HP_ZX1
|
|
bool "HP-zx1/sx1000"
|
|
help
|
|
Build a kernel that runs on HP zx1 and sx1000 systems. This adds
|
|
support for the HP I/O MMU.
|
|
|
|
config IA64_HP_ZX1_SWIOTLB
|
|
bool "HP-zx1/sx1000 with software I/O TLB"
|
|
help
|
|
Build a kernel that runs on HP zx1 and sx1000 systems even when they
|
|
have broken PCI devices which cannot DMA to full 32 bits. Apart
|
|
from support for the HP I/O MMU, this includes support for the software
|
|
I/O TLB, which allows supporting the broken devices at the expense of
|
|
wasting some kernel memory (about 2MB by default).
|
|
|
|
config IA64_SGI_SN2
|
|
bool "SGI-SN2"
|
|
help
|
|
Selecting this option will optimize the kernel for use on sn2 based
|
|
systems, but the resulting kernel binary will not run on other
|
|
types of ia64 systems. If you have an SGI Altix system, it's safe
|
|
to select this option. If in doubt, select ia64 generic support
|
|
instead.
|
|
|
|
config IA64_HP_SIM
|
|
bool "Ski-simulator"
|
|
|
|
endchoice
|
|
|
|
choice
|
|
prompt "Processor type"
|
|
default ITANIUM
|
|
|
|
config ITANIUM
|
|
bool "Itanium"
|
|
help
|
|
Select your IA-64 processor type. The default is Itanium.
|
|
This choice is safe for all IA-64 systems, but may not perform
|
|
optimally on systems with, say, Itanium 2 or newer processors.
|
|
|
|
config MCKINLEY
|
|
bool "Itanium 2"
|
|
help
|
|
Select this to configure for an Itanium 2 (McKinley) processor.
|
|
|
|
endchoice
|
|
|
|
choice
|
|
prompt "Kernel page size"
|
|
default IA64_PAGE_SIZE_16KB
|
|
|
|
config IA64_PAGE_SIZE_4KB
|
|
bool "4KB"
|
|
help
|
|
This lets you select the page size of the kernel. For best IA-64
|
|
performance, a page size of 8KB or 16KB is recommended. For best
|
|
IA-32 compatibility, a page size of 4KB should be selected (the vast
|
|
majority of IA-32 binaries work perfectly fine with a larger page
|
|
size). For Itanium 2 or newer systems, a page size of 64KB can also
|
|
be selected.
|
|
|
|
4KB For best IA-32 compatibility
|
|
8KB For best IA-64 performance
|
|
16KB For best IA-64 performance
|
|
64KB Requires Itanium 2 or newer processor.
|
|
|
|
If you don't know what to do, choose 16KB.
|
|
|
|
config IA64_PAGE_SIZE_8KB
|
|
bool "8KB"
|
|
|
|
config IA64_PAGE_SIZE_16KB
|
|
bool "16KB"
|
|
|
|
config IA64_PAGE_SIZE_64KB
|
|
depends on !ITANIUM
|
|
bool "64KB"
|
|
|
|
endchoice
|
|
|
|
config IA64_BRL_EMU
|
|
bool
|
|
depends on ITANIUM
|
|
default y
|
|
|
|
# align cache-sensitive data to 128 bytes
|
|
config IA64_L1_CACHE_SHIFT
|
|
int
|
|
default "7" if MCKINLEY
|
|
default "6" if ITANIUM
|
|
|
|
# align cache-sensitive data to 64 bytes
|
|
config NUMA
|
|
bool "NUMA support"
|
|
depends on !IA64_HP_SIM
|
|
default y if IA64_SGI_SN2
|
|
select ACPI_NUMA
|
|
help
|
|
Say Y to compile the kernel to support NUMA (Non-Uniform Memory
|
|
Access). This option is for configuring high-end multiprocessor
|
|
server systems. If in doubt, say N.
|
|
|
|
config VIRTUAL_MEM_MAP
|
|
bool "Virtual mem map"
|
|
default y if !IA64_HP_SIM
|
|
help
|
|
Say Y to compile the kernel with support for a virtual mem map.
|
|
This code also only takes effect if a memory hole of greater than
|
|
1 Gb is found during boot. You must turn this option on if you
|
|
require the DISCONTIGMEM option for your machine. If you are
|
|
unsure, say Y.
|
|
|
|
config HOLES_IN_ZONE
|
|
bool
|
|
default y if VIRTUAL_MEM_MAP
|
|
|
|
config DISCONTIGMEM
|
|
bool "Discontiguous memory support"
|
|
depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
|
|
default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
|
|
help
|
|
Say Y to support efficient handling of discontiguous physical memory,
|
|
for architectures which are either NUMA (Non-Uniform Memory Access)
|
|
or have huge holes in the physical address space for other reasons.
|
|
See <file:Documentation/vm/numa> for more.
|
|
|
|
config IA64_CYCLONE
|
|
bool "Cyclone (EXA) Time Source support"
|
|
help
|
|
Say Y here to enable support for IBM EXA Cyclone time source.
|
|
If you're unsure, answer N.
|
|
|
|
config IOSAPIC
|
|
bool
|
|
depends on !IA64_HP_SIM
|
|
default y
|
|
|
|
config IA64_SGI_SN_SIM
|
|
bool "SGI Medusa Simulator Support"
|
|
depends on IA64_SGI_SN2
|
|
help
|
|
If you are compiling a kernel that will run under SGI's IA-64
|
|
simulator (Medusa) then say Y, otherwise say N.
|
|
|
|
config IA64_SGI_SN_XP
|
|
tristate "Support communication between SGI SSIs"
|
|
depends on MSPEC
|
|
help
|
|
An SGI machine can be divided into multiple Single System
|
|
Images which act independently of each other and have
|
|
hardware based memory protection from the others. Enabling
|
|
this feature will allow for direct communication between SSIs
|
|
based on a network adapter and DMA messaging.
|
|
|
|
config FORCE_MAX_ZONEORDER
|
|
int
|
|
default "18"
|
|
|
|
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
|
|
systems, but will use only one CPU of a multiprocessor system. If
|
|
you say Y here, the kernel will run on many, but not all,
|
|
single processor systems. On a single processor system, the kernel
|
|
will run faster if you say N here.
|
|
|
|
See also the <file:Documentation/smp.txt> and the SMP-HOWTO
|
|
available at <http://www.tldp.org/docs.html#howto>.
|
|
|
|
If you don't know what to do here, say N.
|
|
|
|
config NR_CPUS
|
|
int "Maximum number of CPUs (2-512)"
|
|
range 2 512
|
|
depends on SMP
|
|
default "64"
|
|
help
|
|
You should set this to the number of CPUs in your system, but
|
|
keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
|
|
only use 2 CPUs on a >2 CPU system. Setting this to a value larger
|
|
than 64 will cause the use of a CPU mask array, causing a small
|
|
performance hit.
|
|
|
|
config HOTPLUG_CPU
|
|
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
|
|
depends on SMP && EXPERIMENTAL
|
|
select HOTPLUG
|
|
default n
|
|
---help---
|
|
Say Y here to experiment with turning CPUs off and on. CPUs
|
|
can be controlled through /sys/devices/system/cpu/cpu#.
|
|
Say N if you want to disable CPU hotplug.
|
|
|
|
config SCHED_SMT
|
|
bool "SMT scheduler support"
|
|
depends on SMP
|
|
default off
|
|
help
|
|
Improves the CPU scheduler's decision making when dealing with
|
|
Intel IA64 chips with MultiThreading at a cost of slightly increased
|
|
overhead in some places. If unsure say N here.
|
|
|
|
config PREEMPT
|
|
bool "Preemptible Kernel"
|
|
help
|
|
This option reduces the latency of the kernel when reacting to
|
|
real-time or interactive events by allowing a low priority process to
|
|
be preempted even if it is in kernel mode executing a system call.
|
|
This allows applications to run more reliably even when the system is
|
|
under load.
|
|
|
|
Say Y here if you are building a kernel for a desktop, embedded
|
|
or real-time system. Say N if you are unsure.
|
|
|
|
config HAVE_DEC_LOCK
|
|
bool
|
|
depends on (SMP || PREEMPT)
|
|
default y
|
|
|
|
config IA32_SUPPORT
|
|
bool "Support for Linux/x86 binaries"
|
|
help
|
|
IA-64 processors can execute IA-32 (X86) instructions. By
|
|
saying Y here, the kernel will include IA-32 system call
|
|
emulation support which makes it possible to transparently
|
|
run IA-32 Linux binaries on an IA-64 Linux system.
|
|
If in doubt, say Y.
|
|
|
|
config COMPAT
|
|
bool
|
|
depends on IA32_SUPPORT
|
|
default y
|
|
|
|
config IA64_MCA_RECOVERY
|
|
tristate "MCA recovery from errors other than TLB."
|
|
|
|
config PERFMON
|
|
bool "Performance monitor support"
|
|
help
|
|
Selects whether support for the IA-64 performance monitor hardware
|
|
is included in the kernel. This makes some kernel data-structures a
|
|
little bigger and slows down execution a bit, but it is generally
|
|
a good idea to turn this on. If you're unsure, say Y.
|
|
|
|
config IA64_PALINFO
|
|
tristate "/proc/pal support"
|
|
help
|
|
If you say Y here, you are able to get PAL (Processor Abstraction
|
|
Layer) information in /proc/pal. This contains useful information
|
|
about the processors in your systems, such as cache and TLB sizes
|
|
and the PAL firmware version in use.
|
|
|
|
To use this option, you have to ensure that the "/proc file system
|
|
support" (CONFIG_PROC_FS) is enabled, too.
|
|
|
|
config ACPI_DEALLOCATE_IRQ
|
|
bool
|
|
depends on IOSAPIC && EXPERIMENTAL
|
|
default y
|
|
|
|
source "drivers/firmware/Kconfig"
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
endmenu
|
|
|
|
menu "Power management and ACPI"
|
|
|
|
config PM
|
|
bool "Power Management support"
|
|
depends on !IA64_HP_SIM
|
|
default y
|
|
help
|
|
"Power Management" means that parts of your computer are shut
|
|
off or put into a power conserving "sleep" mode if they are not
|
|
being used. There are two competing standards for doing this: APM
|
|
and ACPI. If you want to use either one, say Y here and then also
|
|
to the requisite support below.
|
|
|
|
Power Management is most important for battery powered laptop
|
|
computers; if you have a laptop, check out the Linux Laptop home
|
|
page on the WWW at <http://www.linux-on-laptops.com/> and the
|
|
Battery Powered Linux mini-HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>.
|
|
|
|
Note that, even if you say N here, Linux on the x86 architecture
|
|
will issue the hlt instruction if nothing is to be done, thereby
|
|
sending the processor to sleep and saving power.
|
|
|
|
config ACPI
|
|
bool
|
|
depends on !IA64_HP_SIM
|
|
default y
|
|
|
|
if !IA64_HP_SIM
|
|
|
|
source "drivers/acpi/Kconfig"
|
|
|
|
endif
|
|
|
|
endmenu
|
|
|
|
if !IA64_HP_SIM
|
|
|
|
menu "Bus options (PCI, PCMCIA)"
|
|
|
|
config PCI
|
|
bool "PCI support"
|
|
help
|
|
Find out whether you have a PCI motherboard. PCI is the name of a
|
|
bus system, i.e. the way the CPU talks to the other stuff inside
|
|
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
|
|
VESA. If you have PCI, say Y, otherwise N.
|
|
|
|
The PCI-HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>, contains valuable
|
|
information about which PCI hardware does work under Linux and which
|
|
doesn't.
|
|
|
|
config PCI_DOMAINS
|
|
bool
|
|
default PCI
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
endmenu
|
|
|
|
endif
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "lib/Kconfig"
|
|
|
|
#
|
|
# Use the generic interrupt handling code in kernel/irq/:
|
|
#
|
|
config GENERIC_HARDIRQS
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_IRQ_PROBE
|
|
bool
|
|
default y
|
|
|
|
source "arch/ia64/hp/sim/Kconfig"
|
|
|
|
source "arch/ia64/oprofile/Kconfig"
|
|
|
|
source "arch/ia64/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|