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Chris Metcalf867e3592010-05-28 23:09:12 -04001# For a description of the syntax of this configuration file,
Chris Metcalf5fb682b2011-02-28 15:58:39 -05002# see Documentation/kbuild/kconfig-language.txt.
Chris Metcalf867e3592010-05-28 23:09:12 -04003
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
Thomas Gleixner8df274062011-01-19 20:44:43 +01008 select USE_GENERIC_SMP_HELPERS
9 select CC_OPTIMIZE_FOR_SIZE
10 select HAVE_GENERIC_HARDIRQS
11 select GENERIC_IRQ_PROBE
12 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner61a16742011-03-25 14:21:17 +000013 select GENERIC_IRQ_SHOW
Chris Metcalff133ecc2011-05-26 12:40:09 -040014 select SYS_HYPERVISOR
Chris Metcalf8d695142012-03-27 13:47:57 -040015 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner8df274062011-01-19 20:44:43 +010016
17# FIXME: investigate whether we need/want these options.
18# select HAVE_IOREMAP_PROT
Chris Metcalf5fb682b2011-02-28 15:58:39 -050019# select HAVE_OPTPROBES
20# select HAVE_REGS_AND_STACK_ACCESS_API
21# select HAVE_HW_BREAKPOINT
22# select PERF_EVENTS
23# select HAVE_USER_RETURN_NOTIFIER
24# config NO_BOOTMEM
25# config ARCH_SUPPORTS_DEBUG_PAGEALLOC
26# config HUGETLB_PAGE_SIZE_VARIABLE
Thomas Gleixner8df274062011-01-19 20:44:43 +010027
Chris Metcalf867e3592010-05-28 23:09:12 -040028config MMU
29 def_bool y
30
31config GENERIC_CSUM
32 def_bool y
33
Chris Metcalf867e3592010-05-28 23:09:12 -040034config SEMAPHORE_SLEEPERS
35 def_bool y
36
37config HAVE_ARCH_ALLOC_REMAP
38 def_bool y
39
40config HAVE_SETUP_PER_CPU_AREA
41 def_bool y
42
43config NEED_PER_CPU_PAGE_FIRST_CHUNK
Chris Metcalf5fb682b2011-02-28 15:58:39 -050044 def_bool y
Chris Metcalf867e3592010-05-28 23:09:12 -040045
46config SYS_SUPPORTS_HUGETLBFS
47 def_bool y
48
Chris Metcalf867e3592010-05-28 23:09:12 -040049config GENERIC_CLOCKEVENTS
50 def_bool y
51
Lucas De Marchi25985ed2011-03-30 22:57:33 -030052# FIXME: tilegx can implement a more efficient rwsem.
Chris Metcalf867e3592010-05-28 23:09:12 -040053config RWSEM_GENERIC_SPINLOCK
54 def_bool y
55
56# We have a very flat architecture from a migration point of view,
57# so save boot time by presetting this (particularly useful on tile-sim).
58config DEFAULT_MIGRATION_COST
59 int
60 default "10000000"
61
62# We only support gcc 4.4 and above, so this should work.
63config ARCH_SUPPORTS_OPTIMIZED_INLINING
64 def_bool y
65
66config ARCH_PHYS_ADDR_T_64BIT
67 def_bool y
68
FUJITA Tomonorid31eb512010-10-27 15:32:58 -070069config ARCH_DMA_ADDR_T_64BIT
70 def_bool y
71
Chris Metcalf867e3592010-05-28 23:09:12 -040072config LOCKDEP_SUPPORT
73 def_bool y
74
75config STACKTRACE_SUPPORT
76 def_bool y
77 select STACKTRACE
78
79# We use discontigmem for now; at some point we may want to switch
80# to sparsemem (Tilera bug 7996).
81config ARCH_DISCONTIGMEM_ENABLE
82 def_bool y
83
84config ARCH_DISCONTIGMEM_DEFAULT
85 def_bool y
86
87config TRACE_IRQFLAGS_SUPPORT
88 def_bool y
89
90config STRICT_DEVMEM
91 def_bool y
92
93# SMP is required for Tilera Linux.
94config SMP
95 def_bool y
96
97# Allow checking for compile-time determined overflow errors in
98# copy_from_user(). There are still unprovable places in the
99# generic code as of 2.6.34, so this option is not really compatible
100# with -Werror, which is more useful in general.
101config DEBUG_COPY_FROM_USER
102 def_bool n
103
104config HVC_TILE
105 select HVC_DRIVER
106 def_bool y
107
Chris Metcalf867e3592010-05-28 23:09:12 -0400108# Please note: TILE-Gx support is not yet finalized; this is
109# the preliminary support. TILE-Gx drivers are only provided
110# with the alpha or beta test versions for Tilera customers.
111config TILEGX
112 depends on EXPERIMENTAL
113 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
114
115config 64BIT
116 depends on TILEGX
117 def_bool y
118
119config ARCH_DEFCONFIG
120 string
121 default "arch/tile/configs/tile_defconfig" if !TILEGX
122 default "arch/tile/configs/tilegx_defconfig" if TILEGX
123
124source "init/Kconfig"
125
126menu "Tilera-specific configuration"
127
128config NR_CPUS
129 int "Maximum number of tiles (2-255)"
130 range 2 255
131 depends on SMP
132 default "64"
133 ---help---
134 Building with 64 is the recommended value, but a slightly
135 smaller kernel memory footprint results from using a smaller
136 value on chips with fewer tiles.
137
138source "kernel/time/Kconfig"
139
140source "kernel/Kconfig.hz"
141
142config KEXEC
143 bool "kexec system call"
144 ---help---
145 kexec is a system call that implements the ability to shutdown your
146 current kernel, and to start another kernel. It is like a reboot
147 but it is independent of the system firmware. It is used
148 to implement the "mboot" Tilera booter.
149
150 The name comes from the similarity to the exec system call.
151
152config COMPAT
153 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
154 depends on TILEGX
155 select COMPAT_BINFMT_ELF
156 default y
157 ---help---
158 If enabled, the kernel will support running TILE-Gx binaries
159 that were built with the -m32 option.
160
161config SYSVIPC_COMPAT
162 def_bool y
163 depends on COMPAT && SYSVIPC
164
165# We do not currently support disabling HIGHMEM on tile64 and tilepro.
166config HIGHMEM
167 bool # "Support for more than 512 MB of RAM"
168 default !TILEGX
169 ---help---
170 Linux can use the full amount of RAM in the system by
171 default. However, the address space of TILE processors is
172 only 4 Gigabytes large. That means that, if you have a large
173 amount of physical memory, not all of it can be "permanently
174 mapped" by the kernel. The physical memory that's not
175 permanently mapped is called "high memory".
176
177 If you are compiling a kernel which will never run on a
178 machine with more than 512 MB total physical RAM, answer
179 "false" here. This will result in the kernel mapping all of
180 physical memory into the top 1 GB of virtual memory space.
181
182 If unsure, say "true".
183
184# We do not currently support disabling NUMA.
185config NUMA
186 bool # "NUMA Memory Allocation and Scheduler Support"
187 depends on SMP && DISCONTIGMEM
188 default y
189 ---help---
190 NUMA memory allocation is required for TILE processors
191 unless booting with memory striping enabled in the
192 hypervisor, or with only a single memory controller.
193 It is recommended that this option always be enabled.
194
195config NODES_SHIFT
196 int "Log base 2 of the max number of memory controllers"
197 default 2
198 depends on NEED_MULTIPLE_NODES
199 ---help---
200 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
201 In a system with more controllers, this value should be raised.
202
Chris Metcalf867e3592010-05-28 23:09:12 -0400203choice
204 depends on !TILEGX
David Rientjes6a108a12011-01-20 14:44:16 -0800205 prompt "Memory split" if EXPERT
Chris Metcalf867e3592010-05-28 23:09:12 -0400206 default VMSPLIT_3G
207 ---help---
208 Select the desired split between kernel and user memory.
209
210 If the address range available to the kernel is less than the
211 physical memory installed, the remaining memory will be available
212 as "high memory". Accessing high memory is a little more costly
213 than low memory, as it needs to be mapped into the kernel first.
214 Note that increasing the kernel address space limits the range
215 available to user programs, making the address space there
216 tighter. Selecting anything other than the default 3G/1G split
217 will also likely make your kernel incompatible with binary-only
218 kernel modules.
219
220 If you are not absolutely sure what you are doing, leave this
221 option alone!
222
Chris Metcalf55928402010-09-13 08:50:09 -0400223 config VMSPLIT_3_75G
Chris Metcalf867e3592010-05-28 23:09:12 -0400224 bool "3.75G/0.25G user/kernel split (no kernel networking)"
Chris Metcalf55928402010-09-13 08:50:09 -0400225 config VMSPLIT_3_5G
Chris Metcalf867e3592010-05-28 23:09:12 -0400226 bool "3.5G/0.5G user/kernel split"
227 config VMSPLIT_3G
228 bool "3G/1G user/kernel split"
Chris Metcalf09c17ea2011-02-28 16:01:09 -0500229 config VMSPLIT_2_75G
230 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
231 config VMSPLIT_2_5G
232 bool "2.5G/1.5G user/kernel split"
233 config VMSPLIT_2_25G
234 bool "2.25G/1.75G user/kernel split"
Chris Metcalf867e3592010-05-28 23:09:12 -0400235 config VMSPLIT_2G
236 bool "2G/2G user/kernel split"
237 config VMSPLIT_1G
238 bool "1G/3G user/kernel split"
239endchoice
240
241config PAGE_OFFSET
242 hex
Chris Metcalf55928402010-09-13 08:50:09 -0400243 default 0xF0000000 if VMSPLIT_3_75G
244 default 0xE0000000 if VMSPLIT_3_5G
Chris Metcalf09c17ea2011-02-28 16:01:09 -0500245 default 0xB0000000 if VMSPLIT_2_75G
246 default 0xA0000000 if VMSPLIT_2_5G
247 default 0x90000000 if VMSPLIT_2_25G
Chris Metcalf867e3592010-05-28 23:09:12 -0400248 default 0x80000000 if VMSPLIT_2G
249 default 0x40000000 if VMSPLIT_1G
250 default 0xC0000000
251
252source "mm/Kconfig"
253
254config CMDLINE_BOOL
255 bool "Built-in kernel command line"
256 default n
257 ---help---
258 Allow for specifying boot arguments to the kernel at
259 build time. On some systems (e.g. embedded ones), it is
260 necessary or convenient to provide some or all of the
261 kernel boot arguments with the kernel itself (that is,
262 to not rely on the boot loader to provide them.)
263
264 To compile command line arguments into the kernel,
265 set this option to 'Y', then fill in the
266 the boot arguments in CONFIG_CMDLINE.
267
268 Systems with fully functional boot loaders (e.g. mboot, or
269 if booting over PCI) should leave this option set to 'N'.
270
271config CMDLINE
272 string "Built-in kernel command string"
273 depends on CMDLINE_BOOL
274 default ""
275 ---help---
276 Enter arguments here that should be compiled into the kernel
277 image and used at boot time. If the boot loader provides a
278 command line at boot time, it is appended to this string to
279 form the full kernel command line, when the system boots.
280
281 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
282 change this behavior.
283
284 In most cases, the command line (whether built-in or provided
285 by the boot loader) should specify the device for the root
286 file system.
287
288config CMDLINE_OVERRIDE
289 bool "Built-in command line overrides boot loader arguments"
290 default n
291 depends on CMDLINE_BOOL
292 ---help---
293 Set this option to 'Y' to have the kernel ignore the boot loader
294 command line, and use ONLY the built-in command line.
295
296 This is used to work around broken boot loaders. This should
297 be set to 'N' under normal conditions.
298
299config VMALLOC_RESERVE
300 hex
301 default 0x1000000
302
Chris Metcalf9f9c0382010-06-25 17:00:56 -0400303config HARDWALL
304 bool "Hardwall support to allow access to user dynamic network"
305 default y
306
Chris Metcalfa78c9422010-10-14 16:23:03 -0400307config KERNEL_PL
308 int "Processor protection level for kernel"
309 range 1 2
310 default "1"
311 ---help---
312 This setting determines the processor protection level the
313 kernel will be built to run at. Generally you should use
314 the default value here.
315
Chris Metcalf867e3592010-05-28 23:09:12 -0400316endmenu # Tilera-specific configuration
317
318menu "Bus options"
319
Chris Metcalff02cbbe2010-11-02 12:05:10 -0400320config PCI
321 bool "PCI support"
322 default y
323 select PCI_DOMAINS
Michael S. Tsirkin84550122011-11-29 20:42:56 +0200324 select GENERIC_PCI_IOMAP
Chris Metcalff02cbbe2010-11-02 12:05:10 -0400325 ---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
Chris Metcalf398fa5a2011-05-02 15:09:42 -0400341config HOTPLUG
342 bool "Support for hot-pluggable devices"
343 ---help---
344 Say Y here if you want to plug devices into your computer while
345 the system is running, and be able to use them quickly. In many
346 cases, the devices can likewise be unplugged at any time too.
347 One well-known example of this is USB.
348
Chris Metcalf867e3592010-05-28 23:09:12 -0400349source "drivers/pci/hotplug/Kconfig"
350
351endmenu
352
353menu "Executable file formats"
354
355# only elf supported
356config KCORE_ELF
357 def_bool y
358 depends on PROC_FS
359
360source "fs/Kconfig.binfmt"
361
362endmenu
363
364source "net/Kconfig"
365
366source "drivers/Kconfig"
367
368source "fs/Kconfig"
369
370source "arch/tile/Kconfig.debug"
371
372source "security/Kconfig"
373
374source "crypto/Kconfig"
375
376source "lib/Kconfig"
Chris Metcalfa78c9422010-10-14 16:23:03 -0400377
378source "arch/tile/kvm/Kconfig"