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# $Id: config.in,v 1.158 2002/01/24 22:14:44 davem Exp $ # For a description of the syntax of this configuration file, # see the Configure script. # mainmenu "Linux/UltraSPARC Kernel Configuration" config SPARC bool default y config SPARC64 bool default y help SPARC is a family of RISC microprocessors designed and marketed by Sun Microsystems, incorporated. This port covers the newer 64-bit UltraSPARC. The UltraLinux project maintains both the SPARC32 and SPARC64 ports; its web page is available at <http://www.ultralinux.org/>. config 64BIT def_bool y config MMU bool default y config TIME_INTERPOLATION bool default y config ARCH_MAY_HAVE_PC_FDC bool default y choice prompt "Kernel page size" default SPARC64_PAGE_SIZE_8KB config SPARC64_PAGE_SIZE_8KB bool "8KB" help This lets you select the page size of the kernel. 8KB and 64KB work quite well, since Sparc ELF sections provide for up to 64KB alignment. Therefore, 512KB and 4MB are for expert hackers only. If you don't know what to do, choose 8KB. config SPARC64_PAGE_SIZE_64KB bool "64KB" config SPARC64_PAGE_SIZE_512KB bool "512KB" config SPARC64_PAGE_SIZE_4MB bool "4MB" endchoice 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. source kernel/Kconfig.hz source "init/Kconfig" config SYSVIPC_COMPAT bool depends on COMPAT && SYSVIPC default y menu "General machine setup" 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 many, but not all, singleprocessor machines. On a singleprocessor machine, the kernel will run faster if you say N here. People using multiprocessor machines who say Y here should also say Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. See also the <file:Documentation/smp.txt>, <file:Documentation/nmi_watchdog.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 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 NR_CPUS int "Maximum number of CPUs (2-64)" range 2 64 depends on SMP default "32" source "drivers/cpufreq/Kconfig" config US3_FREQ tristate "UltraSPARC-III CPU Frequency driver" depends on CPU_FREQ select CPU_FREQ_TABLE help This adds the CPUFreq driver for UltraSPARC-III processors. For details, take a look at <file:Documentation/cpu-freq>. If in doubt, say N. config US2E_FREQ tristate "UltraSPARC-IIe CPU Frequency driver" depends on CPU_FREQ select CPU_FREQ_TABLE help This adds the CPUFreq driver for UltraSPARC-IIe processors. For details, take a look at <file:Documentation/cpu-freq>. If in doubt, say N. # Global things across all Sun machines. config RWSEM_GENERIC_SPINLOCK bool config RWSEM_XCHGADD_ALGORITHM bool default y config GENERIC_FIND_NEXT_BIT bool default y config GENERIC_HWEIGHT bool default y if !ULTRA_HAS_POPULATION_COUNT config GENERIC_CALIBRATE_DELAY bool default y choice prompt "SPARC64 Huge TLB Page Size" depends on HUGETLB_PAGE default HUGETLB_PAGE_SIZE_4MB config HUGETLB_PAGE_SIZE_4MB bool "4MB" config HUGETLB_PAGE_SIZE_512K depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB bool "512K" config HUGETLB_PAGE_SIZE_64K depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB bool "64K" endchoice endmenu config ARCH_SELECT_MEMORY_MODEL def_bool y config ARCH_SPARSEMEM_ENABLE def_bool y config ARCH_SPARSEMEM_DEFAULT def_bool y config LARGE_ALLOCS def_bool y source "mm/Kconfig" config GENERIC_ISA_DMA bool default y 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. Other bus systems are PCI, EISA, MicroChannel (MCA) or VESA. ISA is an older system, now being displaced by PCI; newer boards don't support it. If you have ISA, say Y, otherwise N. config ISAPNP bool help Say Y here if you would like support for ISA Plug and Play devices. Some information is in <file:Documentation/isapnp.txt>. To compile this driver as a module, choose M here: the module will be called isapnp. If unsure, say Y. config EISA bool ---help--- The Extended Industry Standard Architecture (EISA) bus was developed as an open alternative to the IBM MicroChannel bus. The EISA bus provided some of the features of the IBM MicroChannel bus while maintaining backward compatibility with cards made for the older ISA bus. The EISA bus saw limited use between 1988 and 1995 when it was made obsolete by the PCI bus. Say Y here if you are building a kernel for an EISA-based machine. Otherwise, say N. config MCA bool help MicroChannel Architecture is found in some IBM PS/2 machines and laptops. It is a bus system similar to PCI or ISA. See <file:Documentation/mca.txt> (and especially the web page given there) before attempting to build an MCA bus kernel. config PCMCIA tristate ---help--- Say Y here if you want to attach PCMCIA- or PC-cards to your Linux computer. These are credit-card size devices such as network cards, modems or hard drives often used with laptops computers. There are actually two varieties of these cards: the older 16 bit PCMCIA cards and the newer 32 bit CardBus cards. If you want to use CardBus cards, you need to say Y here and also to "CardBus support" below. To use your PC-cards, you will need supporting software from David Hinds' pcmcia-cs package (see the file <file:Documentation/Changes> for location). Please also read the PCMCIA-HOWTO, available from <http://www.tldp.org/docs.html#howto>. To compile this driver as modules, choose M here: the modules will be called pcmcia_core and ds. config SBUS bool default y config SBUSCHAR bool default y config SUN_AUXIO bool default y config SUN_IO bool default y 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" config SUN_OPENPROMFS tristate "Openprom tree appears in /proc/openprom" help If you say Y, the OpenPROM device tree will be available as a virtual file system, which you can mount to /proc/openprom by "mount -t openpromfs none /proc/openprom". To compile the /proc/openprom support as a module, choose M here: the module will be called openpromfs. If unsure, choose M. config SPARC32_COMPAT bool "Kernel support for Linux/Sparc 32bit binary compatibility" help This allows you to run 32-bit binaries on your Ultra. Everybody wants this; say Y. config COMPAT bool depends on SPARC32_COMPAT default y config BINFMT_ELF32 tristate "Kernel support for 32-bit ELF binaries" depends on SPARC32_COMPAT help This allows you to run 32-bit Linux/ELF binaries on your Ultra. Everybody wants this; say Y. config BINFMT_AOUT32 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries" depends on SPARC32_COMPAT help This allows you to run 32-bit a.out format binaries on your Ultra. If you want to run SunOS binaries (see SunOS binary emulation below) or other a.out binaries, say Y. If unsure, say N. menu "Executable file formats" source "fs/Kconfig.binfmt" config SUNOS_EMUL bool "SunOS binary emulation" depends on BINFMT_AOUT32 help This allows you to run most SunOS binaries. If you want to do this, say Y here and place appropriate files in /usr/gnemul/sunos. See <http://www.ultralinux.org/faq.html> for more information. If you want to run SunOS binaries on an Ultra you must also say Y to "Kernel support for 32-bit a.out binaries" above. config SOLARIS_EMUL tristate "Solaris binary emulation (EXPERIMENTAL)" depends on SPARC32_COMPAT && EXPERIMENTAL help This is experimental code which will enable you to run (many) Solaris binaries on your SPARC Linux machine. To compile this code as a module, choose M here: the module will be called solaris. endmenu config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" depends on SMP default y help SMT scheduler support improves the CPU scheduler's decision making when dealing with UltraSPARC cpus at a cost of slightly increased overhead in some places. If unsure say N here. config CMDLINE_BOOL bool "Default bootloader kernel arguments" config CMDLINE string "Initial kernel command string" depends on CMDLINE_BOOL default "console=ttyS0,9600 root=/dev/sda1" help Say Y here if you want to be able to pass default arguments to the kernel. This will be overridden by the bootloader, if you use one (such as SILO). This is most useful if you want to boot a kernel from TFTP, and want default options to be available with having them passed on the command line. NOTE: This option WILL override the PROM bootargs setting! source "net/Kconfig" source "drivers/Kconfig" source "drivers/sbus/char/Kconfig" source "drivers/fc4/Kconfig" source "fs/Kconfig" menu "Instrumentation Support" depends on EXPERIMENTAL source "arch/sparc64/oprofile/Kconfig" config KPROBES bool "Kprobes (EXPERIMENTAL)" depends on EXPERIMENTAL && MODULES help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes a probepoint and specifies the callback. Kprobes is useful for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". endmenu source "arch/sparc64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"