1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/config-language.txt.
10 config GENERIC_HARDIRQS
13 config GENERIC_HARDIRQS_NO__DO_IRQ
16 config GENERIC_IRQ_PROBE
19 config GENERIC_PENDING_IRQ
21 depends on GENERIC_HARDIRQS && SMP
23 config SEMAPHORE_SLEEPERS
26 config HAVE_ARCH_ALLOC_REMAP
29 config HAVE_SETUP_PER_CPU_AREA
32 config NEED_PER_CPU_PAGE_FIRST_CHUNK
35 config SYS_SUPPORTS_HUGETLBFS
41 config GENERIC_CLOCKEVENTS
44 # FIXME: tilegx can implement a more efficent rwsem.
45 config RWSEM_GENERIC_SPINLOCK
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
54 # We only support gcc 4.4 and above, so this should work.
55 config ARCH_SUPPORTS_OPTIMIZED_INLINING
58 config ARCH_PHYS_ADDR_T_64BIT
61 config LOCKDEP_SUPPORT
64 config STACKTRACE_SUPPORT
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
73 config ARCH_DISCONTIGMEM_DEFAULT
76 config TRACE_IRQFLAGS_SUPPORT
82 # SMP is required for Tilera Linux.
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
99 select GENERIC_FIND_FIRST_BIT
100 select GENERIC_FIND_NEXT_BIT
101 select USE_GENERIC_SMP_HELPERS
102 select CC_OPTIMIZE_FOR_SIZE
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
110 # select HAVE_USER_RETURN_NOTIFIER
112 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
113 # config HUGETLB_PAGE_SIZE_VARIABLE
116 mainmenu "Linux/TILE Kernel Configuration"
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.
122 depends on EXPERIMENTAL
123 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
129 config ARCH_DEFCONFIG
131 default "arch/tile/configs/tile_defconfig" if !TILEGX
132 default "arch/tile/configs/tilegx_defconfig" if TILEGX
134 source "init/Kconfig"
136 menu "Tilera-specific configuration"
139 int "Maximum number of tiles (2-255)"
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.
148 source "kernel/time/Kconfig"
150 source "kernel/Kconfig.hz"
153 bool "kexec system call"
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.
160 The name comes from the similarity to the exec system call.
163 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
165 select COMPAT_BINFMT_ELF
168 If enabled, the kernel will support running TILE-Gx binaries
169 that were built with the -m32 option.
171 config SYSVIPC_COMPAT
173 depends on COMPAT && SYSVIPC
175 # We do not currently support disabling HIGHMEM on tile64 and tilepro.
177 bool # "Support for more than 512 MB of RAM"
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".
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.
192 If unsure, say "true".
194 # We do not currently support disabling NUMA.
196 bool # "NUMA Memory Allocation and Scheduler Support"
197 depends on SMP && DISCONTIGMEM
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.
206 int "Log base 2 of the max number of memory controllers"
208 depends on NEED_MULTIPLE_NODES
210 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
211 In a system with more controllers, this value should be raised.
213 # Need 16MB areas to enable hugetlb
214 # See build-time check in arch/tile/mm/init.c.
215 config FORCE_MAX_ZONEORDER
221 prompt "Memory split" if EMBEDDED
224 Select the desired split between kernel and user memory.
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
236 If you are not absolutely sure what you are doing, leave this
240 bool "3.75G/0.25G user/kernel split (no kernel networking)"
242 bool "3.5G/0.5G user/kernel split"
244 bool "3G/1G user/kernel split"
245 config VMSPLIT_3G_OPT
246 bool "3G/1G user/kernel split (for full 1G low memory)"
248 bool "2G/2G user/kernel split"
250 bool "1G/3G user/kernel split"
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
265 bool "Built-in kernel command line"
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.)
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.
278 Systems with fully functional boot loaders (e.g. mboot, or
279 if booting over PCI) should leave this option set to 'N'.
282 string "Built-in kernel command string"
283 depends on CMDLINE_BOOL
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.
291 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
292 change this behavior.
294 In most cases, the command line (whether built-in or provided
295 by the boot loader) should specify the device for the root
298 config CMDLINE_OVERRIDE
299 bool "Built-in command line overrides boot loader arguments"
301 depends on CMDLINE_BOOL
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.
306 This is used to work around broken boot loaders. This should
307 be set to 'N' under normal conditions.
309 config VMALLOC_RESERVE
314 bool "Hardwall support to allow access to user dynamic network"
317 endmenu # Tilera-specific configuration
327 source "drivers/pci/Kconfig"
329 source "drivers/pci/hotplug/Kconfig"
333 menu "Executable file formats"
340 source "fs/Kconfig.binfmt"
346 source "drivers/Kconfig"
350 source "arch/tile/Kconfig.debug"
352 source "security/Kconfig"
354 source "crypto/Kconfig"