Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 1 | # For a description of the syntax of this configuration file, |
| 2 | # see Documentation/kbuild/config-language.txt. |
| 3 | |
| 4 | config MMU |
| 5 | def_bool y |
| 6 | |
| 7 | config GENERIC_CSUM |
| 8 | def_bool y |
| 9 | |
| 10 | config GENERIC_HARDIRQS |
| 11 | def_bool y |
| 12 | |
| 13 | config GENERIC_HARDIRQS_NO__DO_IRQ |
| 14 | def_bool y |
| 15 | |
| 16 | config GENERIC_IRQ_PROBE |
| 17 | def_bool y |
| 18 | |
| 19 | config GENERIC_PENDING_IRQ |
| 20 | def_bool y |
| 21 | depends on GENERIC_HARDIRQS && SMP |
| 22 | |
| 23 | config SEMAPHORE_SLEEPERS |
| 24 | def_bool y |
| 25 | |
| 26 | config HAVE_ARCH_ALLOC_REMAP |
| 27 | def_bool y |
| 28 | |
| 29 | config HAVE_SETUP_PER_CPU_AREA |
| 30 | def_bool y |
| 31 | |
| 32 | config NEED_PER_CPU_PAGE_FIRST_CHUNK |
| 33 | def_bool y |
| 34 | |
| 35 | config SYS_SUPPORTS_HUGETLBFS |
| 36 | def_bool y |
| 37 | |
| 38 | config GENERIC_TIME |
| 39 | def_bool y |
| 40 | |
| 41 | config GENERIC_CLOCKEVENTS |
| 42 | def_bool y |
| 43 | |
| 44 | # FIXME: tilegx can implement a more efficent rwsem. |
| 45 | config RWSEM_GENERIC_SPINLOCK |
| 46 | def_bool y |
| 47 | |
| 48 | # We have a very flat architecture from a migration point of view, |
| 49 | # so save boot time by presetting this (particularly useful on tile-sim). |
| 50 | config DEFAULT_MIGRATION_COST |
| 51 | int |
| 52 | default "10000000" |
| 53 | |
| 54 | # We only support gcc 4.4 and above, so this should work. |
| 55 | config ARCH_SUPPORTS_OPTIMIZED_INLINING |
| 56 | def_bool y |
| 57 | |
| 58 | config ARCH_PHYS_ADDR_T_64BIT |
| 59 | def_bool y |
| 60 | |
| 61 | config LOCKDEP_SUPPORT |
| 62 | def_bool y |
| 63 | |
| 64 | config STACKTRACE_SUPPORT |
| 65 | def_bool y |
| 66 | select STACKTRACE |
| 67 | |
| 68 | # We use discontigmem for now; at some point we may want to switch |
| 69 | # to sparsemem (Tilera bug 7996). |
| 70 | config ARCH_DISCONTIGMEM_ENABLE |
| 71 | def_bool y |
| 72 | |
| 73 | config ARCH_DISCONTIGMEM_DEFAULT |
| 74 | def_bool y |
| 75 | |
| 76 | config TRACE_IRQFLAGS_SUPPORT |
| 77 | def_bool y |
| 78 | |
| 79 | config STRICT_DEVMEM |
| 80 | def_bool y |
| 81 | |
| 82 | # SMP is required for Tilera Linux. |
| 83 | config SMP |
| 84 | def_bool y |
| 85 | |
| 86 | # Allow checking for compile-time determined overflow errors in |
| 87 | # copy_from_user(). There are still unprovable places in the |
| 88 | # generic code as of 2.6.34, so this option is not really compatible |
| 89 | # with -Werror, which is more useful in general. |
| 90 | config DEBUG_COPY_FROM_USER |
| 91 | def_bool n |
| 92 | |
| 93 | config HVC_TILE |
| 94 | select HVC_DRIVER |
| 95 | def_bool y |
| 96 | |
| 97 | config TILE |
| 98 | def_bool y |
| 99 | select GENERIC_FIND_FIRST_BIT |
| 100 | select GENERIC_FIND_NEXT_BIT |
| 101 | select USE_GENERIC_SMP_HELPERS |
| 102 | select CC_OPTIMIZE_FOR_SIZE |
| 103 | |
| 104 | # FIXME: investigate whether we need/want these options. |
| 105 | # select HAVE_IOREMAP_PROT |
| 106 | # select HAVE_OPTPROBES |
| 107 | # select HAVE_REGS_AND_STACK_ACCESS_API |
| 108 | # select HAVE_HW_BREAKPOINT |
| 109 | # select PERF_EVENTS |
| 110 | # select HAVE_USER_RETURN_NOTIFIER |
| 111 | # config NO_BOOTMEM |
| 112 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 113 | # config HUGETLB_PAGE_SIZE_VARIABLE |
| 114 | |
| 115 | |
| 116 | mainmenu "Linux/TILE Kernel Configuration" |
| 117 | |
| 118 | # Please note: TILE-Gx support is not yet finalized; this is |
| 119 | # the preliminary support. TILE-Gx drivers are only provided |
| 120 | # with the alpha or beta test versions for Tilera customers. |
| 121 | config TILEGX |
| 122 | depends on EXPERIMENTAL |
| 123 | bool "Building with TILE-Gx (64-bit) compiler and toolchain" |
| 124 | |
| 125 | config 64BIT |
| 126 | depends on TILEGX |
| 127 | def_bool y |
| 128 | |
| 129 | config ARCH_DEFCONFIG |
| 130 | string |
| 131 | default "arch/tile/configs/tile_defconfig" if !TILEGX |
| 132 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
| 133 | |
| 134 | source "init/Kconfig" |
| 135 | |
| 136 | menu "Tilera-specific configuration" |
| 137 | |
| 138 | config NR_CPUS |
| 139 | int "Maximum number of tiles (2-255)" |
| 140 | range 2 255 |
| 141 | depends on SMP |
| 142 | default "64" |
| 143 | ---help--- |
| 144 | Building with 64 is the recommended value, but a slightly |
| 145 | smaller kernel memory footprint results from using a smaller |
| 146 | value on chips with fewer tiles. |
| 147 | |
| 148 | source "kernel/time/Kconfig" |
| 149 | |
| 150 | source "kernel/Kconfig.hz" |
| 151 | |
| 152 | config KEXEC |
| 153 | bool "kexec system call" |
| 154 | ---help--- |
| 155 | kexec is a system call that implements the ability to shutdown your |
| 156 | current kernel, and to start another kernel. It is like a reboot |
| 157 | but it is independent of the system firmware. It is used |
| 158 | to implement the "mboot" Tilera booter. |
| 159 | |
| 160 | The name comes from the similarity to the exec system call. |
| 161 | |
| 162 | config COMPAT |
| 163 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" |
| 164 | depends on TILEGX |
| 165 | select COMPAT_BINFMT_ELF |
| 166 | default y |
| 167 | ---help--- |
| 168 | If enabled, the kernel will support running TILE-Gx binaries |
| 169 | that were built with the -m32 option. |
| 170 | |
| 171 | config SYSVIPC_COMPAT |
| 172 | def_bool y |
| 173 | depends on COMPAT && SYSVIPC |
| 174 | |
| 175 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. |
| 176 | config HIGHMEM |
| 177 | bool # "Support for more than 512 MB of RAM" |
| 178 | default !TILEGX |
| 179 | ---help--- |
| 180 | Linux can use the full amount of RAM in the system by |
| 181 | default. However, the address space of TILE processors is |
| 182 | only 4 Gigabytes large. That means that, if you have a large |
| 183 | amount of physical memory, not all of it can be "permanently |
| 184 | mapped" by the kernel. The physical memory that's not |
| 185 | permanently mapped is called "high memory". |
| 186 | |
| 187 | If you are compiling a kernel which will never run on a |
| 188 | machine with more than 512 MB total physical RAM, answer |
| 189 | "false" here. This will result in the kernel mapping all of |
| 190 | physical memory into the top 1 GB of virtual memory space. |
| 191 | |
| 192 | If unsure, say "true". |
| 193 | |
| 194 | # We do not currently support disabling NUMA. |
| 195 | config NUMA |
| 196 | bool # "NUMA Memory Allocation and Scheduler Support" |
| 197 | depends on SMP && DISCONTIGMEM |
| 198 | default y |
| 199 | ---help--- |
| 200 | NUMA memory allocation is required for TILE processors |
| 201 | unless booting with memory striping enabled in the |
| 202 | hypervisor, or with only a single memory controller. |
| 203 | It is recommended that this option always be enabled. |
| 204 | |
| 205 | config NODES_SHIFT |
| 206 | int "Log base 2 of the max number of memory controllers" |
| 207 | default 2 |
| 208 | depends on NEED_MULTIPLE_NODES |
| 209 | ---help--- |
| 210 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. |
| 211 | In a system with more controllers, this value should be raised. |
| 212 | |
| 213 | # Need 16MB areas to enable hugetlb |
| 214 | # See build-time check in arch/tile/mm/init.c. |
| 215 | config FORCE_MAX_ZONEORDER |
| 216 | int |
| 217 | default 9 |
| 218 | |
| 219 | choice |
| 220 | depends on !TILEGX |
| 221 | prompt "Memory split" if EMBEDDED |
| 222 | default VMSPLIT_3G |
| 223 | ---help--- |
| 224 | Select the desired split between kernel and user memory. |
| 225 | |
| 226 | If the address range available to the kernel is less than the |
| 227 | physical memory installed, the remaining memory will be available |
| 228 | as "high memory". Accessing high memory is a little more costly |
| 229 | than low memory, as it needs to be mapped into the kernel first. |
| 230 | Note that increasing the kernel address space limits the range |
| 231 | available to user programs, making the address space there |
| 232 | tighter. Selecting anything other than the default 3G/1G split |
| 233 | will also likely make your kernel incompatible with binary-only |
| 234 | kernel modules. |
| 235 | |
| 236 | If you are not absolutely sure what you are doing, leave this |
| 237 | option alone! |
| 238 | |
| 239 | config VMSPLIT_375G |
| 240 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
| 241 | config VMSPLIT_35G |
| 242 | bool "3.5G/0.5G user/kernel split" |
| 243 | config VMSPLIT_3G |
| 244 | bool "3G/1G user/kernel split" |
| 245 | config VMSPLIT_3G_OPT |
| 246 | bool "3G/1G user/kernel split (for full 1G low memory)" |
| 247 | config VMSPLIT_2G |
| 248 | bool "2G/2G user/kernel split" |
| 249 | config VMSPLIT_1G |
| 250 | bool "1G/3G user/kernel split" |
| 251 | endchoice |
| 252 | |
| 253 | config PAGE_OFFSET |
| 254 | hex |
| 255 | default 0xF0000000 if VMSPLIT_375G |
| 256 | default 0xE0000000 if VMSPLIT_35G |
| 257 | default 0xB0000000 if VMSPLIT_3G_OPT |
| 258 | default 0x80000000 if VMSPLIT_2G |
| 259 | default 0x40000000 if VMSPLIT_1G |
| 260 | default 0xC0000000 |
| 261 | |
| 262 | source "mm/Kconfig" |
| 263 | |
| 264 | config CMDLINE_BOOL |
| 265 | bool "Built-in kernel command line" |
| 266 | default n |
| 267 | ---help--- |
| 268 | Allow for specifying boot arguments to the kernel at |
| 269 | build time. On some systems (e.g. embedded ones), it is |
| 270 | necessary or convenient to provide some or all of the |
| 271 | kernel boot arguments with the kernel itself (that is, |
| 272 | to not rely on the boot loader to provide them.) |
| 273 | |
| 274 | To compile command line arguments into the kernel, |
| 275 | set this option to 'Y', then fill in the |
| 276 | the boot arguments in CONFIG_CMDLINE. |
| 277 | |
| 278 | Systems with fully functional boot loaders (e.g. mboot, or |
| 279 | if booting over PCI) should leave this option set to 'N'. |
| 280 | |
| 281 | config CMDLINE |
| 282 | string "Built-in kernel command string" |
| 283 | depends on CMDLINE_BOOL |
| 284 | default "" |
| 285 | ---help--- |
| 286 | Enter arguments here that should be compiled into the kernel |
| 287 | image and used at boot time. If the boot loader provides a |
| 288 | command line at boot time, it is appended to this string to |
| 289 | form the full kernel command line, when the system boots. |
| 290 | |
| 291 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to |
| 292 | change this behavior. |
| 293 | |
| 294 | In most cases, the command line (whether built-in or provided |
| 295 | by the boot loader) should specify the device for the root |
| 296 | file system. |
| 297 | |
| 298 | config CMDLINE_OVERRIDE |
| 299 | bool "Built-in command line overrides boot loader arguments" |
| 300 | default n |
| 301 | depends on CMDLINE_BOOL |
| 302 | ---help--- |
| 303 | Set this option to 'Y' to have the kernel ignore the boot loader |
| 304 | command line, and use ONLY the built-in command line. |
| 305 | |
| 306 | This is used to work around broken boot loaders. This should |
| 307 | be set to 'N' under normal conditions. |
| 308 | |
| 309 | config VMALLOC_RESERVE |
| 310 | hex |
| 311 | default 0x1000000 |
| 312 | |
| 313 | endmenu # Tilera-specific configuration |
| 314 | |
| 315 | menu "Bus options" |
| 316 | |
| 317 | config NO_IOMEM |
| 318 | def_bool !PCI |
| 319 | |
| 320 | config NO_IOPORT |
| 321 | def_bool !PCI |
| 322 | |
| 323 | source "drivers/pci/Kconfig" |
| 324 | |
| 325 | source "drivers/pci/hotplug/Kconfig" |
| 326 | |
| 327 | endmenu |
| 328 | |
| 329 | menu "Executable file formats" |
| 330 | |
| 331 | # only elf supported |
| 332 | config KCORE_ELF |
| 333 | def_bool y |
| 334 | depends on PROC_FS |
| 335 | |
| 336 | source "fs/Kconfig.binfmt" |
| 337 | |
| 338 | endmenu |
| 339 | |
| 340 | source "net/Kconfig" |
| 341 | |
| 342 | source "drivers/Kconfig" |
| 343 | |
| 344 | source "fs/Kconfig" |
| 345 | |
| 346 | source "arch/tile/Kconfig.debug" |
| 347 | |
| 348 | source "security/Kconfig" |
| 349 | |
| 350 | source "crypto/Kconfig" |
| 351 | |
| 352 | source "lib/Kconfig" |