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4db8699bcf
Patch to support P-state transitions on ia64. This driver is based on ACPI,
and uses the ACPI processor driver interface to find out the P-state support
information for the processor. This driver plugs into generic cpufreq
infrastructure.
Once this driver is loaded successfully, ondemand/userspace governor can be
used to change the CPU frequency dynamically based on load or on request from
userspace process.
Refer :
ACPI specification -
http://www.acpi.info
P-state related PAL calls -
http://developer.intel.com/design/itanium/downloads/24869909.pdf
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
446 lines
11 KiB
Plaintext
446 lines
11 KiB
Plaintext
#
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# 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 "IA-64 Linux Kernel Configuration"
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source "init/Kconfig"
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menu "Processor type and features"
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config IA64
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bool
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default y
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help
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The Itanium Processor Family is Intel's 64-bit successor to
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the 32-bit X86 line. The IA-64 Linux project has a home
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page at <http://www.linuxia64.org/> and a mailing list at
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<linux-ia64@vger.kernel.org>.
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config 64BIT
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bool
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default y
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config MMU
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bool
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default y
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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_CALIBRATE_DELAY
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bool
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default y
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config TIME_INTERPOLATION
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bool
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default y
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config EFI
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bool
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default y
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config GENERIC_IOMAP
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bool
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default y
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config SCHED_NO_NO_OMIT_FRAME_POINTER
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bool
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default y
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config IA64_UNCACHED_ALLOCATOR
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bool
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select GENERIC_ALLOCATOR
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choice
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prompt "System type"
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default IA64_GENERIC
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config IA64_GENERIC
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bool "generic"
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select NUMA
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select ACPI_NUMA
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select VIRTUAL_MEM_MAP
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select DISCONTIGMEM
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help
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This selects the system type of your hardware. A "generic" kernel
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will run on any supported IA-64 system. However, if you configure
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a kernel for your specific system, it will be faster and smaller.
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generic For any supported IA-64 system
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DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
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HP-zx1/sx1000 For HP systems
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HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
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SGI-SN2 For SGI Altix systems
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Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
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If you don't know what to do, choose "generic".
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config IA64_DIG
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bool "DIG-compliant"
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config IA64_HP_ZX1
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bool "HP-zx1/sx1000"
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help
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Build a kernel that runs on HP zx1 and sx1000 systems. This adds
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support for the HP I/O MMU.
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config IA64_HP_ZX1_SWIOTLB
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bool "HP-zx1/sx1000 with software I/O TLB"
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help
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Build a kernel that runs on HP zx1 and sx1000 systems even when they
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have broken PCI devices which cannot DMA to full 32 bits. Apart
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from support for the HP I/O MMU, this includes support for the software
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I/O TLB, which allows supporting the broken devices at the expense of
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wasting some kernel memory (about 2MB by default).
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config IA64_SGI_SN2
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bool "SGI-SN2"
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help
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Selecting this option will optimize the kernel for use on sn2 based
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systems, but the resulting kernel binary will not run on other
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types of ia64 systems. If you have an SGI Altix system, it's safe
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to select this option. If in doubt, select ia64 generic support
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instead.
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config IA64_HP_SIM
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bool "Ski-simulator"
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endchoice
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choice
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prompt "Processor type"
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default ITANIUM
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config ITANIUM
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bool "Itanium"
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help
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Select your IA-64 processor type. The default is Itanium.
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This choice is safe for all IA-64 systems, but may not perform
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optimally on systems with, say, Itanium 2 or newer processors.
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config MCKINLEY
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bool "Itanium 2"
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help
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Select this to configure for an Itanium 2 (McKinley) processor.
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endchoice
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choice
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prompt "Kernel page size"
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default IA64_PAGE_SIZE_16KB
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config IA64_PAGE_SIZE_4KB
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bool "4KB"
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help
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This lets you select the page size of the kernel. For best IA-64
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performance, a page size of 8KB or 16KB is recommended. For best
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IA-32 compatibility, a page size of 4KB should be selected (the vast
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majority of IA-32 binaries work perfectly fine with a larger page
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size). For Itanium 2 or newer systems, a page size of 64KB can also
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be selected.
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4KB For best IA-32 compatibility
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8KB For best IA-64 performance
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16KB For best IA-64 performance
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64KB Requires Itanium 2 or newer processor.
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If you don't know what to do, choose 16KB.
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config IA64_PAGE_SIZE_8KB
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bool "8KB"
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config IA64_PAGE_SIZE_16KB
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bool "16KB"
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config IA64_PAGE_SIZE_64KB
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depends on !ITANIUM
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bool "64KB"
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endchoice
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source kernel/Kconfig.hz
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config IA64_BRL_EMU
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bool
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depends on ITANIUM
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default y
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# align cache-sensitive data to 128 bytes
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config IA64_L1_CACHE_SHIFT
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int
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default "7" if MCKINLEY
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default "6" if ITANIUM
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# align cache-sensitive data to 64 bytes
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config NUMA
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bool "NUMA support"
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depends on !IA64_HP_SIM
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default y if IA64_SGI_SN2
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select ACPI_NUMA
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help
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Say Y to compile the kernel to support NUMA (Non-Uniform Memory
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Access). This option is for configuring high-end multiprocessor
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server systems. If in doubt, say N.
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config VIRTUAL_MEM_MAP
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bool "Virtual mem map"
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default y if !IA64_HP_SIM
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help
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Say Y to compile the kernel with support for a virtual mem map.
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This code also only takes effect if a memory hole of greater than
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1 Gb is found during boot. You must turn this option on if you
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require the DISCONTIGMEM option for your machine. If you are
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unsure, say Y.
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config HOLES_IN_ZONE
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bool
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default y if VIRTUAL_MEM_MAP
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config ARCH_DISCONTIGMEM_ENABLE
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bool "Discontiguous memory support"
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depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
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default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
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help
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Say Y to support efficient handling of discontiguous physical memory,
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for architectures which are either NUMA (Non-Uniform Memory Access)
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or have huge holes in the physical address space for other reasons.
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See <file:Documentation/vm/numa> for more.
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config IA64_CYCLONE
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bool "Cyclone (EXA) Time Source support"
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help
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Say Y here to enable support for IBM EXA Cyclone time source.
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If you're unsure, answer N.
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config IOSAPIC
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bool
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depends on !IA64_HP_SIM
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default y
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config IA64_SGI_SN_XP
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tristate "Support communication between SGI SSIs"
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select IA64_UNCACHED_ALLOCATOR
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help
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An SGI machine can be divided into multiple Single System
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Images which act independently of each other and have
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hardware based memory protection from the others. Enabling
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this feature will allow for direct communication between SSIs
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based on a network adapter and DMA messaging.
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config FORCE_MAX_ZONEORDER
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int
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default "18"
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config SMP
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bool "Symmetric multi-processing support"
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help
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, say N. If you have a system with more
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than one CPU, say Y.
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If you say N here, the kernel will run on single and multiprocessor
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systems, but will use only one CPU of a multiprocessor system. If
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you say Y here, the kernel will run on many, but not all,
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single processor systems. On a single processor system, the kernel
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will run faster if you say N here.
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See also the <file:Documentation/smp.txt> and the SMP-HOWTO
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available at <http://www.tldp.org/docs.html#howto>.
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If you don't know what to do here, say N.
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config NR_CPUS
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int "Maximum number of CPUs (2-512)"
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range 2 512
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depends on SMP
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default "64"
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help
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You should set this to the number of CPUs in your system, but
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keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
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only use 2 CPUs on a >2 CPU system. Setting this to a value larger
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than 64 will cause the use of a CPU mask array, causing a small
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performance hit.
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config HOTPLUG_CPU
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bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
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depends on SMP && EXPERIMENTAL
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select HOTPLUG
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default n
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---help---
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Say Y here to experiment with turning CPUs off and on. CPUs
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can be controlled through /sys/devices/system/cpu/cpu#.
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Say N if you want to disable CPU hotplug.
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config SCHED_SMT
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bool "SMT scheduler support"
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depends on SMP
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default off
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help
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Improves the CPU scheduler's decision making when dealing with
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Intel IA64 chips with MultiThreading at a cost of slightly increased
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overhead in some places. If unsure say N here.
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config PREEMPT
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bool "Preemptible Kernel"
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help
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This option reduces the latency of the kernel when reacting to
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real-time or interactive events by allowing a low priority process to
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be preempted even if it is in kernel mode executing a system call.
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This allows applications to run more reliably even when the system is
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under load.
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Say Y here if you are building a kernel for a desktop, embedded
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or real-time system. Say N if you are unsure.
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source "mm/Kconfig"
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config HAVE_DEC_LOCK
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bool
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depends on (SMP || PREEMPT)
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default y
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config IA32_SUPPORT
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bool "Support for Linux/x86 binaries"
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help
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IA-64 processors can execute IA-32 (X86) instructions. By
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saying Y here, the kernel will include IA-32 system call
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emulation support which makes it possible to transparently
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run IA-32 Linux binaries on an IA-64 Linux system.
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If in doubt, say Y.
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config COMPAT
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bool
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depends on IA32_SUPPORT
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default y
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config IA64_MCA_RECOVERY
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tristate "MCA recovery from errors other than TLB."
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config PERFMON
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bool "Performance monitor support"
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help
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Selects whether support for the IA-64 performance monitor hardware
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is included in the kernel. This makes some kernel data-structures a
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little bigger and slows down execution a bit, but it is generally
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a good idea to turn this on. If you're unsure, say Y.
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config IA64_PALINFO
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tristate "/proc/pal support"
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help
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If you say Y here, you are able to get PAL (Processor Abstraction
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Layer) information in /proc/pal. This contains useful information
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about the processors in your systems, such as cache and TLB sizes
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and the PAL firmware version in use.
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To use this option, you have to ensure that the "/proc file system
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support" (CONFIG_PROC_FS) is enabled, too.
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config ACPI_DEALLOCATE_IRQ
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bool
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depends on IOSAPIC && EXPERIMENTAL
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default y
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source "drivers/firmware/Kconfig"
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source "fs/Kconfig.binfmt"
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endmenu
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menu "Power management and ACPI"
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config PM
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bool "Power Management support"
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depends on !IA64_HP_SIM
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default y
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help
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"Power Management" means that parts of your computer are shut
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off or put into a power conserving "sleep" mode if they are not
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being used. There are two competing standards for doing this: APM
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and ACPI. If you want to use either one, say Y here and then also
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to the requisite support below.
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Power Management is most important for battery powered laptop
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computers; if you have a laptop, check out the Linux Laptop home
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page on the WWW at <http://www.linux-on-laptops.com/> and the
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Battery Powered Linux mini-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>.
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Note that, even if you say N here, Linux on the x86 architecture
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will issue the hlt instruction if nothing is to be done, thereby
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sending the processor to sleep and saving power.
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config ACPI
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bool
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depends on !IA64_HP_SIM
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default y
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if !IA64_HP_SIM
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source "drivers/acpi/Kconfig"
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endif
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if PM
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source "arch/ia64/kernel/cpufreq/Kconfig"
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endif
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endmenu
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if !IA64_HP_SIM
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menu "Bus options (PCI, PCMCIA)"
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config PCI
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bool "PCI support"
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help
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Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
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here unless you are using a simulator without PCI support.
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config PCI_DOMAINS
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bool
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default PCI
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source "drivers/pci/Kconfig"
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source "drivers/pci/hotplug/Kconfig"
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source "drivers/pcmcia/Kconfig"
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endmenu
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endif
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source "net/Kconfig"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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source "lib/Kconfig"
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#
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# Use the generic interrupt handling code in kernel/irq/:
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#
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config GENERIC_HARDIRQS
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bool
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default y
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config GENERIC_IRQ_PROBE
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bool
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default y
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source "arch/ia64/hp/sim/Kconfig"
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source "arch/ia64/oprofile/Kconfig"
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source "arch/ia64/Kconfig.debug"
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source "security/Kconfig"
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source "crypto/Kconfig"
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