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Diffstat (limited to 'arch/x86_64/Kconfig')
| -rw-r--r-- | arch/x86_64/Kconfig | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig new file mode 100644 index 00000000000..80c38c5d71f --- /dev/null +++ b/arch/x86_64/Kconfig @@ -0,0 +1,477 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/kconfig-language.txt. +# +# Note: ISA is disabled and will hopefully never be enabled. +# If you managed to buy an ISA x86-64 box you'll have to fix all the +# ISA drivers you need yourself. +# + +mainmenu "Linux Kernel Configuration" + +config X86_64 + bool + default y + help + Port to the x86-64 architecture. x86-64 is a 64-bit extension to the + classical 32-bit x86 architecture. For details see + <http://www.x86-64.org/>. + +config 64BIT + def_bool y + +config X86 + bool + default y + +config MMU + bool + default y + +config ISA + bool + +config SBUS + bool + +config RWSEM_GENERIC_SPINLOCK + bool + default y + +config RWSEM_XCHGADD_ALGORITHM + bool + +config GENERIC_CALIBRATE_DELAY + bool + default y + +config X86_CMPXCHG + bool + default y + +config EARLY_PRINTK + bool + default y + +config GENERIC_ISA_DMA + bool + default y + +config GENERIC_IOMAP + bool + default y + +source "init/Kconfig" + + +menu "Processor type and features" + +choice + prompt "Processor family" + default MK8 + +config MK8 + bool "AMD-Opteron/Athlon64" + help + Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs. + +config MPSC + bool "Intel EM64T" + help + Optimize for Intel Pentium 4 and Xeon CPUs with Intel + Extended Memory 64 Technology(EM64T). For details see + <http://www.intel.com/technology/64bitextensions/>. + +config GENERIC_CPU + bool "Generic-x86-64" + help + Generic x86-64 CPU. + +endchoice + +# +# Define implied options from the CPU selection here +# +config X86_L1_CACHE_BYTES + int + default "128" if GENERIC_CPU || MPSC + default "64" if MK8 + +config X86_L1_CACHE_SHIFT + int + default "7" if GENERIC_CPU || MPSC + default "6" if MK8 + +config X86_TSC + bool + default y + +config X86_GOOD_APIC + bool + default y + +config MICROCODE + tristate "/dev/cpu/microcode - Intel CPU microcode support" + ---help--- + If you say Y here the 'File systems' section, you will be + able to update the microcode on Intel processors. You will + obviously need the actual microcode binary data itself which is + not shipped with the Linux kernel. + + For latest news and information on obtaining all the required + ingredients for this driver, check: + <http://www.urbanmyth.org/microcode/>. + + To compile this driver as a module, choose M here: the + module will be called microcode. + If you use modprobe or kmod you may also want to add the line + 'alias char-major-10-184 microcode' to your /etc/modules.conf file. + +config X86_MSR + tristate "/dev/cpu/*/msr - Model-specific register support" + help + This device gives privileged processes access to the x86 + Model-Specific Registers (MSRs). It is a character device with + major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. + MSR accesses are directed to a specific CPU on multi-processor + systems. + +config X86_CPUID + tristate "/dev/cpu/*/cpuid - CPU information support" + help + This device gives processes access to the x86 CPUID instruction to + be executed on a specific processor. It is a character device + with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to + /dev/cpu/31/cpuid. + +# disable it for opteron optimized builds because it pulls in ACPI_BOOT +config X86_HT + bool + depends on SMP && !MK8 + default y + +config MATH_EMULATION + bool + +config MCA + bool + +config EISA + bool + +config X86_IO_APIC + bool + default y + +config X86_LOCAL_APIC + bool + default y + +config MTRR + bool "MTRR (Memory Type Range Register) support" + ---help--- + On Intel P6 family processors (Pentium Pro, Pentium II and later) + the Memory Type Range Registers (MTRRs) may be used to control + processor access to memory ranges. This is most useful if you have + a video (VGA) card on a PCI or AGP bus. Enabling write-combining + allows bus write transfers to be combined into a larger transfer + before bursting over the PCI/AGP bus. This can increase performance + of image write operations 2.5 times or more. Saying Y here creates a + /proc/mtrr file which may be used to manipulate your processor's + MTRRs. Typically the X server should use this. + + This code has a reasonably generic interface so that similar + control registers on other processors can be easily supported + as well. + + Saying Y here also fixes a problem with buggy SMP BIOSes which only + set the MTRRs for the boot CPU and not for the secondary CPUs. This + can lead to all sorts of problems, so it's good to say Y here. + + Just say Y here, all x86-64 machines support MTRRs. + + See <file:Documentation/mtrr.txt> for more information. + +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, like most personal computers, 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 many, but not all, + singleprocessor machines. On a singleprocessor machine, the kernel + will run faster if you say N here. + + If you don't know what to do here, say N. + +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. On contrary it may also break your drivers and add + priority inheritance problems to your system. Don't select it if + you rely on a stable system or have slightly obscure hardware. + It's also not very well tested on x86-64 currently. + You have been warned. + + Say Y here if you are feeling brave and building a kernel for a + desktop, embedded or real-time system. Say N if you are unsure. + +config PREEMPT_BKL + bool "Preempt The Big Kernel Lock" + depends on PREEMPT + default y + help + This option reduces the latency of the kernel by making the + big kernel lock preemptible. + + Say Y here if you are building a kernel for a desktop system. + Say N if you are unsure. + +config SCHED_SMT + bool "SMT (Hyperthreading) scheduler support" + depends on SMP + default n + help + SMT scheduler support improves the CPU scheduler's decision making + when dealing with Intel Pentium 4 chips with HyperThreading at a + cost of slightly increased overhead in some places. If unsure say + N here. + +config K8_NUMA + bool "K8 NUMA support" + select NUMA + depends on SMP + help + Enable NUMA (Non Unified Memory Architecture) support for + AMD Opteron Multiprocessor systems. The kernel will try to allocate + memory used by a CPU on the local memory controller of the CPU + and add some more NUMA awareness to the kernel. + This code is recommended on all multiprocessor Opteron systems + and normally doesn't hurt on others. + +config NUMA_EMU + bool "NUMA emulation support" + select NUMA + depends on SMP + help + Enable NUMA emulation. A flat machine will be split + into virtual nodes when booted with "numa=fake=N", where N is the + number of nodes. This is only useful for debugging. + +config DISCONTIGMEM + bool + depends on NUMA + default y + +config NUMA + bool + default n + +config HAVE_DEC_LOCK + bool + depends on SMP + default y + +config NR_CPUS + int "Maximum number of CPUs (2-256)" + range 2 256 + depends on SMP + default "8" + help + This allows you to specify the maximum number of CPUs which this + kernel will support. Current maximum is 256 CPUs due to + APIC addressing limits. Less depending on the hardware. + + This is purely to save memory - each supported CPU requires + memory in the static kernel configuration. + +config HPET_TIMER + bool + default y + help + Use the IA-PC HPET (High Precision Event Timer) to manage + time in preference to the PIT and RTC, if a HPET is + present. The HPET provides a stable time base on SMP + systems, unlike the TSC, but it is more expensive to access, + as it is off-chip. You can find the HPET spec at + <http://www.intel.com/labs/platcomp/hpet/hpetspec.htm>. + +config HPET_EMULATE_RTC + bool "Provide RTC interrupt" + depends on HPET_TIMER && RTC=y + +config GART_IOMMU + bool "IOMMU support" + depends on PCI + help + Support the K8 IOMMU. Needed to run systems with more than 4GB of memory + properly with 32-bit PCI devices that do not support DAC (Double Address + Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. + Normally the kernel will take the right choice by itself. + If unsure, say Y. + +# need this always enabled with GART_IOMMU for the VIA workaround +config SWIOTLB + bool + depends on GART_IOMMU + default y + +config DUMMY_IOMMU + bool + depends on !GART_IOMMU && !SWIOTLB + default y + help + Don't use IOMMU code. This will cause problems when you have more than 4GB + of memory and any 32-bit devices. Don't turn on unless you know what you + are doing. + +config X86_MCE + bool "Machine check support" if EMBEDDED + default y + help + Include a machine check error handler to report hardware errors. + This version will require the mcelog utility to decode some + machine check error logs. See + ftp://ftp.x86-64.org/pub/linux/tools/mcelog + +config X86_MCE_INTEL + bool "Intel MCE features" + depends on X86_MCE && X86_LOCAL_APIC + default y + help + Additional support for intel specific MCE features such as + the thermal monitor. + +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 + +# +# Use the generic interrupt handling code in kernel/irq/: +# +config GENERIC_HARDIRQS + bool + default y + +config GENERIC_IRQ_PROBE + bool + default y + +menu "Power management options" + +source kernel/power/Kconfig + +source "drivers/acpi/Kconfig" + +source "arch/x86_64/kernel/cpufreq/Kconfig" + +endmenu + +menu "Bus options (PCI etc.)" + +config PCI + bool "PCI support" + +# x86-64 doesn't support PCI BIOS access from long mode so always go direct. +config PCI_DIRECT + bool + depends on PCI + default y + +config PCI_MMCONFIG + bool "Support mmconfig PCI config space access" + depends on PCI + select ACPI_BOOT + +config UNORDERED_IO + bool "Unordered IO mapping access" + depends on EXPERIMENTAL + help + Use unordered stores to access IO memory mappings in device drivers. + Still very experimental. When a driver works on IA64/ppc64/pa-risc it should + work with this option, but it makes the drivers behave differently + from i386. Requires that the driver writer used memory barriers + properly. + +source "drivers/pci/pcie/Kconfig" + +source "drivers/pci/Kconfig" + +source "drivers/pcmcia/Kconfig" + +source "drivers/pci/hotplug/Kconfig" + +endmenu + + +menu "Executable file formats / Emulations" + +source "fs/Kconfig.binfmt" + +config IA32_EMULATION + bool "IA32 Emulation" + help + Include code to run 32-bit programs under a 64-bit kernel. You should likely + turn this on, unless you're 100% sure that you don't have any 32-bit programs + left. + +config IA32_AOUT + bool "IA32 a.out support" + depends on IA32_EMULATION + help + Support old a.out binaries in the 32bit emulation. + +config COMPAT + bool + depends on IA32_EMULATION + default y + +config SYSVIPC_COMPAT + bool + depends on COMPAT && SYSVIPC + default y + +config UID16 + bool + depends on IA32_EMULATION + default y + +endmenu + +source drivers/Kconfig + +source "drivers/firmware/Kconfig" + +source fs/Kconfig + +source "arch/x86_64/oprofile/Kconfig" + +source "arch/x86_64/Kconfig.debug" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" |