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Chris Metcalf867e3592010-05-28 23:09:12 -04001# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/config-language.txt.
3
Thomas Gleixner8df274062011-01-19 20:44:43 +01004config TILE
5 def_bool y
6 select HAVE_KVM if !TILEGX
7 select GENERIC_FIND_FIRST_BIT
8 select GENERIC_FIND_NEXT_BIT
9 select USE_GENERIC_SMP_HELPERS
10 select CC_OPTIMIZE_FOR_SIZE
11 select HAVE_GENERIC_HARDIRQS
12 select GENERIC_IRQ_PROBE
13 select GENERIC_PENDING_IRQ if SMP
14
15# FIXME: investigate whether we need/want these options.
16# select HAVE_IOREMAP_PROT
17# select HAVE_OPTPROBES
18# select HAVE_REGS_AND_STACK_ACCESS_API
19# select HAVE_HW_BREAKPOINT
20# select PERF_EVENTS
21# select HAVE_USER_RETURN_NOTIFIER
22# config NO_BOOTMEM
23# config ARCH_SUPPORTS_DEBUG_PAGEALLOC
24# config HUGETLB_PAGE_SIZE_VARIABLE
25
Chris Metcalf867e3592010-05-28 23:09:12 -040026config MMU
27 def_bool y
28
29config GENERIC_CSUM
30 def_bool y
31
Chris Metcalf867e3592010-05-28 23:09:12 -040032config SEMAPHORE_SLEEPERS
33 def_bool y
34
35config HAVE_ARCH_ALLOC_REMAP
36 def_bool y
37
38config HAVE_SETUP_PER_CPU_AREA
39 def_bool y
40
41config NEED_PER_CPU_PAGE_FIRST_CHUNK
42 def_bool y
43
44config SYS_SUPPORTS_HUGETLBFS
45 def_bool y
46
47config GENERIC_TIME
48 def_bool y
49
50config GENERIC_CLOCKEVENTS
51 def_bool y
52
53# FIXME: tilegx can implement a more efficent rwsem.
54config RWSEM_GENERIC_SPINLOCK
55 def_bool y
56
57# We have a very flat architecture from a migration point of view,
58# so save boot time by presetting this (particularly useful on tile-sim).
59config DEFAULT_MIGRATION_COST
60 int
61 default "10000000"
62
63# We only support gcc 4.4 and above, so this should work.
64config ARCH_SUPPORTS_OPTIMIZED_INLINING
65 def_bool y
66
67config ARCH_PHYS_ADDR_T_64BIT
68 def_bool y
69
FUJITA Tomonorid31eb512010-10-27 15:32:58 -070070config ARCH_DMA_ADDR_T_64BIT
71 def_bool y
72
Chris Metcalf867e3592010-05-28 23:09:12 -040073config LOCKDEP_SUPPORT
74 def_bool y
75
76config STACKTRACE_SUPPORT
77 def_bool y
78 select STACKTRACE
79
80# We use discontigmem for now; at some point we may want to switch
81# to sparsemem (Tilera bug 7996).
82config ARCH_DISCONTIGMEM_ENABLE
83 def_bool y
84
85config ARCH_DISCONTIGMEM_DEFAULT
86 def_bool y
87
88config TRACE_IRQFLAGS_SUPPORT
89 def_bool y
90
91config STRICT_DEVMEM
92 def_bool y
93
94# SMP is required for Tilera Linux.
95config SMP
96 def_bool y
97
98# Allow checking for compile-time determined overflow errors in
99# copy_from_user(). There are still unprovable places in the
100# generic code as of 2.6.34, so this option is not really compatible
101# with -Werror, which is more useful in general.
102config DEBUG_COPY_FROM_USER
103 def_bool n
104
105config HVC_TILE
106 select HVC_DRIVER
107 def_bool y
108
Chris Metcalf867e3592010-05-28 23:09:12 -0400109# Please note: TILE-Gx support is not yet finalized; this is
110# the preliminary support. TILE-Gx drivers are only provided
111# with the alpha or beta test versions for Tilera customers.
112config TILEGX
113 depends on EXPERIMENTAL
114 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
115
116config 64BIT
117 depends on TILEGX
118 def_bool y
119
120config ARCH_DEFCONFIG
121 string
122 default "arch/tile/configs/tile_defconfig" if !TILEGX
123 default "arch/tile/configs/tilegx_defconfig" if TILEGX
124
125source "init/Kconfig"
126
127menu "Tilera-specific configuration"
128
129config NR_CPUS
130 int "Maximum number of tiles (2-255)"
131 range 2 255
132 depends on SMP
133 default "64"
134 ---help---
135 Building with 64 is the recommended value, but a slightly
136 smaller kernel memory footprint results from using a smaller
137 value on chips with fewer tiles.
138
139source "kernel/time/Kconfig"
140
141source "kernel/Kconfig.hz"
142
143config KEXEC
144 bool "kexec system call"
145 ---help---
146 kexec is a system call that implements the ability to shutdown your
147 current kernel, and to start another kernel. It is like a reboot
148 but it is independent of the system firmware. It is used
149 to implement the "mboot" Tilera booter.
150
151 The name comes from the similarity to the exec system call.
152
153config COMPAT
154 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
155 depends on TILEGX
156 select COMPAT_BINFMT_ELF
157 default y
158 ---help---
159 If enabled, the kernel will support running TILE-Gx binaries
160 that were built with the -m32 option.
161
162config SYSVIPC_COMPAT
163 def_bool y
164 depends on COMPAT && SYSVIPC
165
166# We do not currently support disabling HIGHMEM on tile64 and tilepro.
167config HIGHMEM
168 bool # "Support for more than 512 MB of RAM"
169 default !TILEGX
170 ---help---
171 Linux can use the full amount of RAM in the system by
172 default. However, the address space of TILE processors is
173 only 4 Gigabytes large. That means that, if you have a large
174 amount of physical memory, not all of it can be "permanently
175 mapped" by the kernel. The physical memory that's not
176 permanently mapped is called "high memory".
177
178 If you are compiling a kernel which will never run on a
179 machine with more than 512 MB total physical RAM, answer
180 "false" here. This will result in the kernel mapping all of
181 physical memory into the top 1 GB of virtual memory space.
182
183 If unsure, say "true".
184
185# We do not currently support disabling NUMA.
186config NUMA
187 bool # "NUMA Memory Allocation and Scheduler Support"
188 depends on SMP && DISCONTIGMEM
189 default y
190 ---help---
191 NUMA memory allocation is required for TILE processors
192 unless booting with memory striping enabled in the
193 hypervisor, or with only a single memory controller.
194 It is recommended that this option always be enabled.
195
196config NODES_SHIFT
197 int "Log base 2 of the max number of memory controllers"
198 default 2
199 depends on NEED_MULTIPLE_NODES
200 ---help---
201 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
202 In a system with more controllers, this value should be raised.
203
204# Need 16MB areas to enable hugetlb
205# See build-time check in arch/tile/mm/init.c.
206config FORCE_MAX_ZONEORDER
207 int
208 default 9
209
210choice
211 depends on !TILEGX
David Rientjes6a108a12011-01-20 14:44:16 -0800212 prompt "Memory split" if EXPERT
Chris Metcalf867e3592010-05-28 23:09:12 -0400213 default VMSPLIT_3G
214 ---help---
215 Select the desired split between kernel and user memory.
216
217 If the address range available to the kernel is less than the
218 physical memory installed, the remaining memory will be available
219 as "high memory". Accessing high memory is a little more costly
220 than low memory, as it needs to be mapped into the kernel first.
221 Note that increasing the kernel address space limits the range
222 available to user programs, making the address space there
223 tighter. Selecting anything other than the default 3G/1G split
224 will also likely make your kernel incompatible with binary-only
225 kernel modules.
226
227 If you are not absolutely sure what you are doing, leave this
228 option alone!
229
Chris Metcalf55928402010-09-13 08:50:09 -0400230 config VMSPLIT_3_75G
Chris Metcalf867e3592010-05-28 23:09:12 -0400231 bool "3.75G/0.25G user/kernel split (no kernel networking)"
Chris Metcalf55928402010-09-13 08:50:09 -0400232 config VMSPLIT_3_5G
Chris Metcalf867e3592010-05-28 23:09:12 -0400233 bool "3.5G/0.5G user/kernel split"
234 config VMSPLIT_3G
235 bool "3G/1G user/kernel split"
236 config VMSPLIT_3G_OPT
237 bool "3G/1G user/kernel split (for full 1G low memory)"
238 config VMSPLIT_2G
239 bool "2G/2G user/kernel split"
240 config VMSPLIT_1G
241 bool "1G/3G user/kernel split"
242endchoice
243
244config PAGE_OFFSET
245 hex
Chris Metcalf55928402010-09-13 08:50:09 -0400246 default 0xF0000000 if VMSPLIT_3_75G
247 default 0xE0000000 if VMSPLIT_3_5G
Chris Metcalf867e3592010-05-28 23:09:12 -0400248 default 0xB0000000 if VMSPLIT_3G_OPT
249 default 0x80000000 if VMSPLIT_2G
250 default 0x40000000 if VMSPLIT_1G
251 default 0xC0000000
252
253source "mm/Kconfig"
254
255config CMDLINE_BOOL
256 bool "Built-in kernel command line"
257 default n
258 ---help---
259 Allow for specifying boot arguments to the kernel at
260 build time. On some systems (e.g. embedded ones), it is
261 necessary or convenient to provide some or all of the
262 kernel boot arguments with the kernel itself (that is,
263 to not rely on the boot loader to provide them.)
264
265 To compile command line arguments into the kernel,
266 set this option to 'Y', then fill in the
267 the boot arguments in CONFIG_CMDLINE.
268
269 Systems with fully functional boot loaders (e.g. mboot, or
270 if booting over PCI) should leave this option set to 'N'.
271
272config CMDLINE
273 string "Built-in kernel command string"
274 depends on CMDLINE_BOOL
275 default ""
276 ---help---
277 Enter arguments here that should be compiled into the kernel
278 image and used at boot time. If the boot loader provides a
279 command line at boot time, it is appended to this string to
280 form the full kernel command line, when the system boots.
281
282 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
283 change this behavior.
284
285 In most cases, the command line (whether built-in or provided
286 by the boot loader) should specify the device for the root
287 file system.
288
289config CMDLINE_OVERRIDE
290 bool "Built-in command line overrides boot loader arguments"
291 default n
292 depends on CMDLINE_BOOL
293 ---help---
294 Set this option to 'Y' to have the kernel ignore the boot loader
295 command line, and use ONLY the built-in command line.
296
297 This is used to work around broken boot loaders. This should
298 be set to 'N' under normal conditions.
299
300config VMALLOC_RESERVE
301 hex
302 default 0x1000000
303
Chris Metcalf9f9c0382010-06-25 17:00:56 -0400304config HARDWALL
305 bool "Hardwall support to allow access to user dynamic network"
306 default y
307
Chris Metcalfa78c9422010-10-14 16:23:03 -0400308config KERNEL_PL
309 int "Processor protection level for kernel"
310 range 1 2
311 default "1"
312 ---help---
313 This setting determines the processor protection level the
314 kernel will be built to run at. Generally you should use
315 the default value here.
316
Chris Metcalf867e3592010-05-28 23:09:12 -0400317endmenu # Tilera-specific configuration
318
319menu "Bus options"
320
Chris Metcalff02cbbe2010-11-02 12:05:10 -0400321config PCI
322 bool "PCI support"
323 default y
324 select PCI_DOMAINS
325 ---help---
326 Enable PCI root complex support, so PCIe endpoint devices can
327 be attached to the Tile chip. Many, but not all, PCI devices
328 are supported under Tilera's root complex driver.
329
330config PCI_DOMAINS
331 bool
332
Chris Metcalf867e3592010-05-28 23:09:12 -0400333config NO_IOMEM
334 def_bool !PCI
335
336config NO_IOPORT
337 def_bool !PCI
338
339source "drivers/pci/Kconfig"
340
341source "drivers/pci/hotplug/Kconfig"
342
343endmenu
344
345menu "Executable file formats"
346
347# only elf supported
348config KCORE_ELF
349 def_bool y
350 depends on PROC_FS
351
352source "fs/Kconfig.binfmt"
353
354endmenu
355
356source "net/Kconfig"
357
358source "drivers/Kconfig"
359
360source "fs/Kconfig"
361
362source "arch/tile/Kconfig.debug"
363
364source "security/Kconfig"
365
366source "crypto/Kconfig"
367
368source "lib/Kconfig"
Chris Metcalfa78c9422010-10-14 16:23:03 -0400369
370source "arch/tile/kvm/Kconfig"