| # For a description of the syntax of this configuration file, |
| # see Documentation/kbuild/kconfig-language.txt. |
| |
| config TILE |
| def_bool y |
| select HAVE_DMA_ATTRS |
| select HAVE_DMA_API_DEBUG |
| select HAVE_KVM if !TILEGX |
| select GENERIC_FIND_FIRST_BIT |
| select SYSCTL_EXCEPTION_TRACE |
| select USE_GENERIC_SMP_HELPERS |
| select CC_OPTIMIZE_FOR_SIZE |
| select HAVE_DEBUG_KMEMLEAK |
| select HAVE_GENERIC_HARDIRQS |
| select GENERIC_IRQ_PROBE |
| select GENERIC_PENDING_IRQ if SMP |
| select GENERIC_IRQ_SHOW |
| select HAVE_DEBUG_BUGVERBOSE |
| select HAVE_SYSCALL_WRAPPERS if TILEGX |
| select VIRT_TO_BUS |
| select SYS_HYPERVISOR |
| select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| select GENERIC_CLOCKEVENTS |
| select MODULES_USE_ELF_RELA |
| select HAVE_ARCH_TRACEHOOK |
| select HAVE_SYSCALL_TRACEPOINTS |
| select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
| |
| # 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 |
| |
| config MMU |
| def_bool y |
| |
| config GENERIC_CSUM |
| def_bool y |
| |
| 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 |
| |
| # Support for additional huge page sizes besides HPAGE_SIZE. |
| # The software support is currently only present in the TILE-Gx |
| # hypervisor. TILEPro in any case does not support page sizes |
| # larger than the default HPAGE_SIZE. |
| config HUGETLB_SUPER_PAGES |
| depends on HUGETLB_PAGE && TILEGX |
| def_bool y |
| |
| # FIXME: tilegx can implement a more efficient 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 ARCH_DMA_ADDR_T_64BIT |
| def_bool y |
| |
| config NEED_DMA_MAP_STATE |
| def_bool y |
| |
| config ARCH_HAS_DMA_SET_COHERENT_MASK |
| bool |
| |
| 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 |
| depends on TTY |
| select HVC_DRIVER |
| def_bool y |
| |
| config TILEGX |
| bool "Building with TILE-Gx (64-bit) compiler and toolchain" |
| |
| config TILEPRO |
| def_bool !TILEGX |
| |
| config 64BIT |
| def_bool TILEGX |
| |
| config ARCH_DEFCONFIG |
| string |
| default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
| default "arch/tile/configs/tilegx_defconfig" if TILEGX |
| |
| source "init/Kconfig" |
| |
| source "kernel/Kconfig.freezer" |
| |
| 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. |
| |
| if TILEGX |
| |
| choice |
| prompt "Kernel page size" |
| default PAGE_SIZE_64KB |
| help |
| This lets you select the page size of the kernel. For best |
| performance on memory-intensive applications, a page size of 64KB |
| is recommended. For workloads involving many small files, many |
| connections, etc., it may be better to select 16KB, which uses |
| memory more efficiently at some cost in TLB performance. |
| |
| Note that this option is TILE-Gx specific; currently |
| TILEPro page size is set by rebuilding the hypervisor. |
| |
| config PAGE_SIZE_16KB |
| bool "16KB" |
| |
| config PAGE_SIZE_64KB |
| bool "64KB" |
| |
| endchoice |
| |
| endif |
| |
| 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". |
| |
| config ZONE_DMA |
| def_bool y |
| |
| config IOMMU_HELPER |
| bool |
| |
| config NEED_SG_DMA_LENGTH |
| bool |
| |
| config SWIOTLB |
| bool |
| default TILEGX |
| select IOMMU_HELPER |
| select NEED_SG_DMA_LENGTH |
| select ARCH_HAS_DMA_SET_COHERENT_MASK |
| |
| # 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. |
| |
| choice |
| depends on !TILEGX |
| prompt "Memory split" if EXPERT |
| 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_3_75G |
| bool "3.75G/0.25G user/kernel split (no kernel networking)" |
| config VMSPLIT_3_5G |
| bool "3.5G/0.5G user/kernel split" |
| config VMSPLIT_3G |
| bool "3G/1G user/kernel split" |
| config VMSPLIT_2_75G |
| bool "2.75G/1.25G user/kernel split (for full 1G low memory)" |
| config VMSPLIT_2_5G |
| bool "2.5G/1.5G user/kernel split" |
| config VMSPLIT_2_25G |
| bool "2.25G/1.75G user/kernel split" |
| config VMSPLIT_2G |
| bool "2G/2G user/kernel split" |
| config VMSPLIT_1G |
| bool "1G/3G user/kernel split" |
| endchoice |
| |
| config PAGE_OFFSET |
| hex |
| depends on !64BIT |
| default 0xF0000000 if VMSPLIT_3_75G |
| default 0xE0000000 if VMSPLIT_3_5G |
| default 0xB0000000 if VMSPLIT_2_75G |
| default 0xA0000000 if VMSPLIT_2_5G |
| default 0x90000000 if VMSPLIT_2_25G |
| 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 |
| |
| config HARDWALL |
| bool "Hardwall support to allow access to user dynamic network" |
| default y |
| |
| config KERNEL_PL |
| int "Processor protection level for kernel" |
| range 1 2 |
| default "1" |
| ---help--- |
| This setting determines the processor protection level the |
| kernel will be built to run at. Generally you should use |
| the default value here. |
| |
| source "arch/tile/gxio/Kconfig" |
| |
| endmenu # Tilera-specific configuration |
| |
| menu "Bus options" |
| |
| config PCI |
| bool "PCI support" |
| default y |
| select PCI_DOMAINS |
| select GENERIC_PCI_IOMAP |
| select TILE_GXIO_TRIO if TILEGX |
| select ARCH_SUPPORTS_MSI if TILEGX |
| select PCI_MSI if TILEGX |
| ---help--- |
| Enable PCI root complex support, so PCIe endpoint devices can |
| be attached to the Tile chip. Many, but not all, PCI devices |
| are supported under Tilera's root complex driver. |
| |
| config PCI_DOMAINS |
| bool |
| |
| config NO_IOMEM |
| def_bool !PCI |
| |
| config NO_IOPORT |
| def_bool !PCI |
| |
| source "drivers/pci/Kconfig" |
| |
| config TILE_USB |
| tristate "Tilera USB host adapter support" |
| default y |
| depends on USB |
| depends on TILEGX |
| select TILE_GXIO_USB_HOST |
| ---help--- |
| Provides USB host adapter support for the built-in EHCI and OHCI |
| interfaces on TILE-Gx chips. |
| |
| 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" |
| |
| source "arch/tile/kvm/Kconfig" |