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_IRQ_PROBE
16 config GENERIC_PENDING_IRQ
18 depends on GENERIC_HARDIRQS && SMP
20 config SEMAPHORE_SLEEPERS
23 config HAVE_ARCH_ALLOC_REMAP
26 config HAVE_SETUP_PER_CPU_AREA
29 config NEED_PER_CPU_PAGE_FIRST_CHUNK
32 config SYS_SUPPORTS_HUGETLBFS
38 config GENERIC_CLOCKEVENTS
41 # FIXME: tilegx can implement a more efficent rwsem.
42 config RWSEM_GENERIC_SPINLOCK
45 # We have a very flat architecture from a migration point of view,
46 # so save boot time by presetting this (particularly useful on tile-sim).
47 config DEFAULT_MIGRATION_COST
51 # We only support gcc 4.4 and above, so this should work.
52 config ARCH_SUPPORTS_OPTIMIZED_INLINING
55 config ARCH_PHYS_ADDR_T_64BIT
58 config ARCH_DMA_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 HAVE_KVM if !TILEGX
100 select GENERIC_FIND_FIRST_BIT
101 select GENERIC_FIND_NEXT_BIT
102 select USE_GENERIC_SMP_HELPERS
103 select CC_OPTIMIZE_FOR_SIZE
105 # FIXME: investigate whether we need/want these options.
106 # select HAVE_IOREMAP_PROT
107 # select HAVE_OPTPROBES
108 # select HAVE_REGS_AND_STACK_ACCESS_API
109 # select HAVE_HW_BREAKPOINT
111 # select HAVE_USER_RETURN_NOTIFIER
113 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
114 # config HUGETLB_PAGE_SIZE_VARIABLE
117 # Please note: TILE-Gx support is not yet finalized; this is
118 # the preliminary support. TILE-Gx drivers are only provided
119 # with the alpha or beta test versions for Tilera customers.
121 depends on EXPERIMENTAL
122 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
128 config ARCH_DEFCONFIG
130 default "arch/tile/configs/tile_defconfig" if !TILEGX
131 default "arch/tile/configs/tilegx_defconfig" if TILEGX
133 source "init/Kconfig"
135 menu "Tilera-specific configuration"
138 int "Maximum number of tiles (2-255)"
143 Building with 64 is the recommended value, but a slightly
144 smaller kernel memory footprint results from using a smaller
145 value on chips with fewer tiles.
147 source "kernel/time/Kconfig"
149 source "kernel/Kconfig.hz"
152 bool "kexec system call"
154 kexec is a system call that implements the ability to shutdown your
155 current kernel, and to start another kernel. It is like a reboot
156 but it is independent of the system firmware. It is used
157 to implement the "mboot" Tilera booter.
159 The name comes from the similarity to the exec system call.
162 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
164 select COMPAT_BINFMT_ELF
167 If enabled, the kernel will support running TILE-Gx binaries
168 that were built with the -m32 option.
170 config SYSVIPC_COMPAT
172 depends on COMPAT && SYSVIPC
174 # We do not currently support disabling HIGHMEM on tile64 and tilepro.
176 bool # "Support for more than 512 MB of RAM"
179 Linux can use the full amount of RAM in the system by
180 default. However, the address space of TILE processors is
181 only 4 Gigabytes large. That means that, if you have a large
182 amount of physical memory, not all of it can be "permanently
183 mapped" by the kernel. The physical memory that's not
184 permanently mapped is called "high memory".
186 If you are compiling a kernel which will never run on a
187 machine with more than 512 MB total physical RAM, answer
188 "false" here. This will result in the kernel mapping all of
189 physical memory into the top 1 GB of virtual memory space.
191 If unsure, say "true".
193 # We do not currently support disabling NUMA.
195 bool # "NUMA Memory Allocation and Scheduler Support"
196 depends on SMP && DISCONTIGMEM
199 NUMA memory allocation is required for TILE processors
200 unless booting with memory striping enabled in the
201 hypervisor, or with only a single memory controller.
202 It is recommended that this option always be enabled.
205 int "Log base 2 of the max number of memory controllers"
207 depends on NEED_MULTIPLE_NODES
209 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
210 In a system with more controllers, this value should be raised.
212 # Need 16MB areas to enable hugetlb
213 # See build-time check in arch/tile/mm/init.c.
214 config FORCE_MAX_ZONEORDER
220 prompt "Memory split" if EXPERT
223 Select the desired split between kernel and user memory.
225 If the address range available to the kernel is less than the
226 physical memory installed, the remaining memory will be available
227 as "high memory". Accessing high memory is a little more costly
228 than low memory, as it needs to be mapped into the kernel first.
229 Note that increasing the kernel address space limits the range
230 available to user programs, making the address space there
231 tighter. Selecting anything other than the default 3G/1G split
232 will also likely make your kernel incompatible with binary-only
235 If you are not absolutely sure what you are doing, leave this
239 bool "3.75G/0.25G user/kernel split (no kernel networking)"
241 bool "3.5G/0.5G user/kernel split"
243 bool "3G/1G user/kernel split"
244 config VMSPLIT_3G_OPT
245 bool "3G/1G user/kernel split (for full 1G low memory)"
247 bool "2G/2G user/kernel split"
249 bool "1G/3G user/kernel split"
254 default 0xF0000000 if VMSPLIT_3_75G
255 default 0xE0000000 if VMSPLIT_3_5G
256 default 0xB0000000 if VMSPLIT_3G_OPT
257 default 0x80000000 if VMSPLIT_2G
258 default 0x40000000 if VMSPLIT_1G
264 bool "Built-in kernel command line"
267 Allow for specifying boot arguments to the kernel at
268 build time. On some systems (e.g. embedded ones), it is
269 necessary or convenient to provide some or all of the
270 kernel boot arguments with the kernel itself (that is,
271 to not rely on the boot loader to provide them.)
273 To compile command line arguments into the kernel,
274 set this option to 'Y', then fill in the
275 the boot arguments in CONFIG_CMDLINE.
277 Systems with fully functional boot loaders (e.g. mboot, or
278 if booting over PCI) should leave this option set to 'N'.
281 string "Built-in kernel command string"
282 depends on CMDLINE_BOOL
285 Enter arguments here that should be compiled into the kernel
286 image and used at boot time. If the boot loader provides a
287 command line at boot time, it is appended to this string to
288 form the full kernel command line, when the system boots.
290 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
291 change this behavior.
293 In most cases, the command line (whether built-in or provided
294 by the boot loader) should specify the device for the root
297 config CMDLINE_OVERRIDE
298 bool "Built-in command line overrides boot loader arguments"
300 depends on CMDLINE_BOOL
302 Set this option to 'Y' to have the kernel ignore the boot loader
303 command line, and use ONLY the built-in command line.
305 This is used to work around broken boot loaders. This should
306 be set to 'N' under normal conditions.
308 config VMALLOC_RESERVE
313 bool "Hardwall support to allow access to user dynamic network"
317 int "Processor protection level for kernel"
321 This setting determines the processor protection level the
322 kernel will be built to run at. Generally you should use
323 the default value here.
325 endmenu # Tilera-specific configuration
334 Enable PCI root complex support, so PCIe endpoint devices can
335 be attached to the Tile chip. Many, but not all, PCI devices
336 are supported under Tilera's root complex driver.
347 source "drivers/pci/Kconfig"
349 source "drivers/pci/hotplug/Kconfig"
353 menu "Executable file formats"
360 source "fs/Kconfig.binfmt"
366 source "drivers/Kconfig"
370 source "arch/tile/Kconfig.debug"
372 source "security/Kconfig"
374 source "crypto/Kconfig"
378 source "arch/tile/kvm/Kconfig"