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Diffstat (limited to 'arch/tile/Kconfig')
| -rw-r--r-- | arch/tile/Kconfig | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig new file mode 100644 index 0000000..290ef41 --- /dev/null +++ b/arch/tile/Kconfig @@ -0,0 +1,352 @@ +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/config-language.txt. + +config MMU + def_bool y + +config GENERIC_CSUM + def_bool y + +config GENERIC_HARDIRQS + def_bool y + +config GENERIC_HARDIRQS_NO__DO_IRQ + def_bool y + +config GENERIC_IRQ_PROBE + def_bool y + +config GENERIC_PENDING_IRQ + def_bool y + depends on GENERIC_HARDIRQS && SMP + +config SEMAPHORE_SLEEPERS + def_bool y + +config HAVE_ARCH_ALLOC_REMAP + def_bool y + +config HAVE_SETUP_PER_CPU_AREA + def_bool y + +config NEED_PER_CPU_PAGE_FIRST_CHUNK + def_bool y + +config SYS_SUPPORTS_HUGETLBFS + def_bool y + +config GENERIC_TIME + def_bool y + +config GENERIC_CLOCKEVENTS + def_bool y + +# FIXME: tilegx can implement a more efficent rwsem. +config RWSEM_GENERIC_SPINLOCK + def_bool y + +# We have a very flat architecture from a migration point of view, +# so save boot time by presetting this (particularly useful on tile-sim). +config DEFAULT_MIGRATION_COST + int + default "10000000" + +# We only support gcc 4.4 and above, so this should work. +config ARCH_SUPPORTS_OPTIMIZED_INLINING + def_bool y + +config ARCH_PHYS_ADDR_T_64BIT + def_bool y + +config LOCKDEP_SUPPORT + def_bool y + +config STACKTRACE_SUPPORT + def_bool y + select STACKTRACE + +# We use discontigmem for now; at some point we may want to switch +# to sparsemem (Tilera bug 7996). +config ARCH_DISCONTIGMEM_ENABLE + def_bool y + +config ARCH_DISCONTIGMEM_DEFAULT + def_bool y + +config TRACE_IRQFLAGS_SUPPORT + def_bool y + +config STRICT_DEVMEM + def_bool y + +# SMP is required for Tilera Linux. +config SMP + def_bool y + +# Allow checking for compile-time determined overflow errors in +# copy_from_user(). There are still unprovable places in the +# generic code as of 2.6.34, so this option is not really compatible +# with -Werror, which is more useful in general. +config DEBUG_COPY_FROM_USER + def_bool n + +config HVC_TILE + select HVC_DRIVER + def_bool y + +config TILE + def_bool y + select GENERIC_FIND_FIRST_BIT + select GENERIC_FIND_NEXT_BIT + select USE_GENERIC_SMP_HELPERS + select CC_OPTIMIZE_FOR_SIZE + +# FIXME: investigate whether we need/want these options. +# select HAVE_IOREMAP_PROT +# select HAVE_OPTPROBES +# select HAVE_REGS_AND_STACK_ACCESS_API +# select HAVE_HW_BREAKPOINT +# select PERF_EVENTS +# select HAVE_USER_RETURN_NOTIFIER +# config NO_BOOTMEM +# config ARCH_SUPPORTS_DEBUG_PAGEALLOC +# config HUGETLB_PAGE_SIZE_VARIABLE + + +mainmenu "Linux/TILE Kernel Configuration" + +# Please note: TILE-Gx support is not yet finalized; this is +# the preliminary support. TILE-Gx drivers are only provided +# with the alpha or beta test versions for Tilera customers. +config TILEGX + depends on EXPERIMENTAL + bool "Building with TILE-Gx (64-bit) compiler and toolchain" + +config 64BIT + depends on TILEGX + def_bool y + +config ARCH_DEFCONFIG + string + default "arch/tile/configs/tile_defconfig" if !TILEGX + default "arch/tile/configs/tilegx_defconfig" if TILEGX + +source "init/Kconfig" + +menu "Tilera-specific configuration" + +config NR_CPUS + int "Maximum number of tiles (2-255)" + range 2 255 + depends on SMP + default "64" + ---help--- + Building with 64 is the recommended value, but a slightly + smaller kernel memory footprint results from using a smaller + value on chips with fewer tiles. + +source "kernel/time/Kconfig" + +source "kernel/Kconfig.hz" + +config KEXEC + bool "kexec system call" + ---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 independent of the system firmware. It is used + to implement the "mboot" Tilera booter. + + The name comes from the similarity to the exec system call. + +config COMPAT + bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" + depends on TILEGX + select COMPAT_BINFMT_ELF + default y + ---help--- + If enabled, the kernel will support running TILE-Gx binaries + that were built with the -m32 option. + +config SYSVIPC_COMPAT + def_bool y + depends on COMPAT && SYSVIPC + +# We do not currently support disabling HIGHMEM on tile64 and tilepro. +config HIGHMEM + bool # "Support for more than 512 MB of RAM" + default !TILEGX + ---help--- + Linux can use the full amount of RAM in the system by + default. However, the address space of TILE processors is + only 4 Gigabytes large. That means that, if you have a large + amount of physical memory, not all of it can be "permanently + mapped" by the kernel. The physical memory that's not + permanently mapped is called "high memory". + + If you are compiling a kernel which will never run on a + machine with more than 512 MB total physical RAM, answer + "false" here. This will result in the kernel mapping all of + physical memory into the top 1 GB of virtual memory space. + + If unsure, say "true". + +# We do not currently support disabling NUMA. +config NUMA + bool # "NUMA Memory Allocation and Scheduler Support" + depends on SMP && DISCONTIGMEM + default y + ---help--- + NUMA memory allocation is required for TILE processors + unless booting with memory striping enabled in the + hypervisor, or with only a single memory controller. + It is recommended that this option always be enabled. + +config NODES_SHIFT + int "Log base 2 of the max number of memory controllers" + default 2 + depends on NEED_MULTIPLE_NODES + ---help--- + By default, 2, i.e. 2^2 == 4 DDR2 controllers. + In a system with more controllers, this value should be raised. + +# Need 16MB areas to enable hugetlb +# See build-time check in arch/tile/mm/init.c. +config FORCE_MAX_ZONEORDER + int + default 9 + +choice + depends on !TILEGX + prompt "Memory split" if EMBEDDED + default VMSPLIT_3G + ---help--- + Select the desired split between kernel and user memory. + + If the address range available to the kernel is less than the + physical memory installed, the remaining memory will be available + as "high memory". Accessing high memory is a little more costly + than low memory, as it needs to be mapped into the kernel first. + Note that increasing the kernel address space limits the range + available to user programs, making the address space there + tighter. Selecting anything other than the default 3G/1G split + will also likely make your kernel incompatible with binary-only + kernel modules. + + If you are not absolutely sure what you are doing, leave this + option alone! + + config VMSPLIT_375G + bool "3.75G/0.25G user/kernel split (no kernel networking)" + config VMSPLIT_35G + bool "3.5G/0.5G user/kernel split" + config VMSPLIT_3G + bool "3G/1G user/kernel split" + config VMSPLIT_3G_OPT + bool "3G/1G user/kernel split (for full 1G low memory)" + config VMSPLIT_2G + bool "2G/2G user/kernel split" + config VMSPLIT_1G + bool "1G/3G user/kernel split" +endchoice + +config PAGE_OFFSET + hex + default 0xF0000000 if VMSPLIT_375G + default 0xE0000000 if VMSPLIT_35G + default 0xB0000000 if VMSPLIT_3G_OPT + default 0x80000000 if VMSPLIT_2G + default 0x40000000 if VMSPLIT_1G + default 0xC0000000 + +source "mm/Kconfig" + +config CMDLINE_BOOL + bool "Built-in kernel command line" + default n + ---help--- + Allow for specifying boot arguments to the kernel at + build time. On some systems (e.g. embedded ones), it is + necessary or convenient to provide some or all of the + kernel boot arguments with the kernel itself (that is, + to not rely on the boot loader to provide them.) + + To compile command line arguments into the kernel, + set this option to 'Y', then fill in the + the boot arguments in CONFIG_CMDLINE. + + Systems with fully functional boot loaders (e.g. mboot, or + if booting over PCI) should leave this option set to 'N'. + +config CMDLINE + string "Built-in kernel command string" + depends on CMDLINE_BOOL + default "" + ---help--- + Enter arguments here that should be compiled into the kernel + image and used at boot time. If the boot loader provides a + command line at boot time, it is appended to this string to + form the full kernel command line, when the system boots. + + However, you can use the CONFIG_CMDLINE_OVERRIDE option to + change this behavior. + + In most cases, the command line (whether built-in or provided + by the boot loader) should specify the device for the root + file system. + +config CMDLINE_OVERRIDE + bool "Built-in command line overrides boot loader arguments" + default n + depends on CMDLINE_BOOL + ---help--- + Set this option to 'Y' to have the kernel ignore the boot loader + command line, and use ONLY the built-in command line. + + This is used to work around broken boot loaders. This should + be set to 'N' under normal conditions. + +config VMALLOC_RESERVE + hex + default 0x1000000 + +endmenu # Tilera-specific configuration + +menu "Bus options" + +config NO_IOMEM + def_bool !PCI + +config NO_IOPORT + def_bool !PCI + +source "drivers/pci/Kconfig" + +source "drivers/pci/hotplug/Kconfig" + +endmenu + +menu "Executable file formats" + +# only elf supported +config KCORE_ELF + def_bool y + depends on PROC_FS + +source "fs/Kconfig.binfmt" + +endmenu + +source "net/Kconfig" + +source "drivers/Kconfig" + +source "fs/Kconfig" + +source "arch/tile/Kconfig.debug" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" |