1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
6 select HAVE_PERF_EVENTS
7 select USE_PMC if PERF_EVENTS
9 select HAVE_DMA_API_DEBUG
10 select HAVE_KVM if !TILEGX
11 select GENERIC_FIND_FIRST_BIT
12 select SYSCTL_EXCEPTION_TRACE
13 select CC_OPTIMIZE_FOR_SIZE
14 select HAVE_DEBUG_KMEMLEAK
15 select GENERIC_IRQ_PROBE
16 select GENERIC_PENDING_IRQ if SMP
17 select GENERIC_IRQ_SHOW
18 select HAVE_DEBUG_BUGVERBOSE
21 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
22 select ARCH_HAVE_NMI_SAFE_CMPXCHG
23 select GENERIC_CLOCKEVENTS
24 select MODULES_USE_ELF_RELA
25 select HAVE_ARCH_TRACEHOOK
26 select HAVE_SYSCALL_TRACEPOINTS
27 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
28 select HAVE_DEBUG_STACKOVERFLOW
29 select ARCH_WANT_FRAME_POINTERS
31 # FIXME: investigate whether we need/want these options.
32 # select HAVE_IOREMAP_PROT
33 # select HAVE_OPTPROBES
34 # select HAVE_REGS_AND_STACK_ACCESS_API
35 # select HAVE_HW_BREAKPOINT
37 # select HAVE_USER_RETURN_NOTIFIER
39 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
40 # config HUGETLB_PAGE_SIZE_VARIABLE
48 config HAVE_ARCH_ALLOC_REMAP
51 config HAVE_SETUP_PER_CPU_AREA
54 config NEED_PER_CPU_PAGE_FIRST_CHUNK
57 config SYS_SUPPORTS_HUGETLBFS
60 # Support for additional huge page sizes besides HPAGE_SIZE.
61 # The software support is currently only present in the TILE-Gx
62 # hypervisor. TILEPro in any case does not support page sizes
63 # larger than the default HPAGE_SIZE.
64 config HUGETLB_SUPER_PAGES
65 depends on HUGETLB_PAGE && TILEGX
68 config GENERIC_TIME_VSYSCALL
71 # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled.
75 # FIXME: tilegx can implement a more efficient rwsem.
76 config RWSEM_GENERIC_SPINLOCK
79 # We only support gcc 4.4 and above, so this should work.
80 config ARCH_SUPPORTS_OPTIMIZED_INLINING
83 config ARCH_PHYS_ADDR_T_64BIT
86 config ARCH_DMA_ADDR_T_64BIT
89 config NEED_DMA_MAP_STATE
92 config ARCH_HAS_DMA_SET_COHERENT_MASK
95 config LOCKDEP_SUPPORT
98 config STACKTRACE_SUPPORT
102 # We use discontigmem for now; at some point we may want to switch
103 # to sparsemem (Tilera bug 7996).
104 config ARCH_DISCONTIGMEM_ENABLE
107 config ARCH_DISCONTIGMEM_DEFAULT
110 config TRACE_IRQFLAGS_SUPPORT
116 # SMP is required for Tilera Linux.
123 select HVC_IRQ if TILEGX
127 bool "Building for TILE-Gx (64-bit) processor"
129 select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
130 select HAVE_FUNCTION_TRACER
131 select HAVE_FUNCTION_GRAPH_TRACER
132 select HAVE_DYNAMIC_FTRACE
133 select HAVE_FTRACE_MCOUNT_RECORD
135 select HAVE_KRETPROBES
136 select HAVE_ARCH_KGDB
137 select ARCH_SUPPORTS_ATOMIC_RMW
145 config ARCH_DEFCONFIG
147 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
148 default "arch/tile/configs/tilegx_defconfig" if TILEGX
150 config PGTABLE_LEVELS
155 source "init/Kconfig"
157 source "kernel/Kconfig.freezer"
159 menu "Tilera-specific configuration"
162 int "Maximum number of tiles (2-255)"
167 Building with 64 is the recommended value, but a slightly
168 smaller kernel memory footprint results from using a smaller
169 value on chips with fewer tiles.
174 prompt "Kernel page size"
175 default PAGE_SIZE_64KB
177 This lets you select the page size of the kernel. For best
178 performance on memory-intensive applications, a page size of 64KB
179 is recommended. For workloads involving many small files, many
180 connections, etc., it may be better to select 16KB, which uses
181 memory more efficiently at some cost in TLB performance.
183 Note that this option is TILE-Gx specific; currently
184 TILEPro page size is set by rebuilding the hypervisor.
186 config PAGE_SIZE_16KB
189 config PAGE_SIZE_64KB
196 source "kernel/Kconfig.hz"
199 bool "kexec system call"
201 kexec is a system call that implements the ability to shutdown your
202 current kernel, and to start another kernel. It is like a reboot
203 but it is independent of the system firmware. It is used
204 to implement the "mboot" Tilera booter.
206 The name comes from the similarity to the exec system call.
209 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
211 select COMPAT_BINFMT_ELF
214 If enabled, the kernel will support running TILE-Gx binaries
215 that were built with the -m32 option.
217 config SYSVIPC_COMPAT
219 depends on COMPAT && SYSVIPC
221 # We do not currently support disabling HIGHMEM on tilepro.
223 bool # "Support for more than 512 MB of RAM"
226 Linux can use the full amount of RAM in the system by
227 default. However, the address space of TILE processors is
228 only 4 Gigabytes large. That means that, if you have a large
229 amount of physical memory, not all of it can be "permanently
230 mapped" by the kernel. The physical memory that's not
231 permanently mapped is called "high memory".
233 If you are compiling a kernel which will never run on a
234 machine with more than 512 MB total physical RAM, answer
235 "false" here. This will result in the kernel mapping all of
236 physical memory into the top 1 GB of virtual memory space.
238 If unsure, say "true".
246 config NEED_SG_DMA_LENGTH
253 select NEED_SG_DMA_LENGTH
254 select ARCH_HAS_DMA_SET_COHERENT_MASK
256 # We do not currently support disabling NUMA.
258 bool # "NUMA Memory Allocation and Scheduler Support"
259 depends on SMP && DISCONTIGMEM
262 NUMA memory allocation is required for TILE processors
263 unless booting with memory striping enabled in the
264 hypervisor, or with only a single memory controller.
265 It is recommended that this option always be enabled.
268 int "Log base 2 of the max number of memory controllers"
270 depends on NEED_MULTIPLE_NODES
272 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
273 In a system with more controllers, this value should be raised.
277 prompt "Memory split" if EXPERT
280 Select the desired split between kernel and user memory.
282 If the address range available to the kernel is less than the
283 physical memory installed, the remaining memory will be available
284 as "high memory". Accessing high memory is a little more costly
285 than low memory, as it needs to be mapped into the kernel first.
286 Note that increasing the kernel address space limits the range
287 available to user programs, making the address space there
288 tighter. Selecting anything other than the default 3G/1G split
289 will also likely make your kernel incompatible with binary-only
292 If you are not absolutely sure what you are doing, leave this
296 bool "3.75G/0.25G user/kernel split (no kernel networking)"
298 bool "3.5G/0.5G user/kernel split"
300 bool "3G/1G user/kernel split"
302 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
304 bool "2.5G/1.5G user/kernel split"
306 bool "2.25G/1.75G user/kernel split"
308 bool "2G/2G user/kernel split"
310 bool "1G/3G user/kernel split"
316 default 0xF0000000 if VMSPLIT_3_75G
317 default 0xE0000000 if VMSPLIT_3_5G
318 default 0xB0000000 if VMSPLIT_2_75G
319 default 0xA0000000 if VMSPLIT_2_5G
320 default 0x90000000 if VMSPLIT_2_25G
321 default 0x80000000 if VMSPLIT_2G
322 default 0x40000000 if VMSPLIT_1G
327 source "kernel/Kconfig.preempt"
330 bool "Built-in kernel command line"
333 Allow for specifying boot arguments to the kernel at
334 build time. On some systems (e.g. embedded ones), it is
335 necessary or convenient to provide some or all of the
336 kernel boot arguments with the kernel itself (that is,
337 to not rely on the boot loader to provide them.)
339 To compile command line arguments into the kernel,
340 set this option to 'Y', then fill in the
341 the boot arguments in CONFIG_CMDLINE.
343 Systems with fully functional boot loaders (e.g. mboot, or
344 if booting over PCI) should leave this option set to 'N'.
347 string "Built-in kernel command string"
348 depends on CMDLINE_BOOL
351 Enter arguments here that should be compiled into the kernel
352 image and used at boot time. If the boot loader provides a
353 command line at boot time, it is appended to this string to
354 form the full kernel command line, when the system boots.
356 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
357 change this behavior.
359 In most cases, the command line (whether built-in or provided
360 by the boot loader) should specify the device for the root
363 config CMDLINE_OVERRIDE
364 bool "Built-in command line overrides boot loader arguments"
366 depends on CMDLINE_BOOL
368 Set this option to 'Y' to have the kernel ignore the boot loader
369 command line, and use ONLY the built-in command line.
371 This is used to work around broken boot loaders. This should
372 be set to 'N' under normal conditions.
374 config VMALLOC_RESERVE
379 bool "Hardwall support to allow access to user dynamic network"
383 int "Processor protection level for kernel"
388 Since MDE 4.2, the Tilera hypervisor runs the kernel
389 at PL2 by default. If running under an older hypervisor,
390 or as a KVM guest, you must run at PL1. (The current
391 hypervisor may also be recompiled with "make HV_PL=2" to
392 allow it to run a kernel at PL1, but clients running at PL1
393 are not expected to be supported indefinitely.)
395 If you're not sure, don't change the default.
397 source "arch/tile/gxio/Kconfig"
399 endmenu # Tilera-specific configuration
407 select GENERIC_PCI_IOMAP
408 select TILE_GXIO_TRIO if TILEGX
409 select PCI_MSI if TILEGX
411 Enable PCI root complex support, so PCIe endpoint devices can
412 be attached to the Tile chip. Many, but not all, PCI devices
413 are supported under Tilera's root complex driver.
425 bool "PCI I/O space support"
430 Enable PCI I/O space support on TILEGx. Since the PCI I/O space
431 is used by few modern PCIe endpoint devices, its support is disabled
432 by default to save the TRIO PIO Region resource for other purposes.
434 source "drivers/pci/Kconfig"
436 source "drivers/pci/pcie/Kconfig"
439 tristate "Tilera USB host adapter support"
443 select TILE_GXIO_USB_HOST
445 Provides USB host adapter support for the built-in EHCI and OHCI
446 interfaces on TILE-Gx chips.
448 source "drivers/pci/hotplug/Kconfig"
452 menu "Executable file formats"
454 source "fs/Kconfig.binfmt"
460 source "drivers/Kconfig"
464 source "arch/tile/Kconfig.debug"
466 source "security/Kconfig"
468 source "crypto/Kconfig"
472 source "arch/tile/kvm/Kconfig"