1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
7 select HAVE_DMA_API_DEBUG
8 select HAVE_KVM if !TILEGX
9 select GENERIC_FIND_FIRST_BIT
10 select SYSCTL_EXCEPTION_TRACE
11 select USE_GENERIC_SMP_HELPERS
12 select CC_OPTIMIZE_FOR_SIZE
13 select HAVE_DEBUG_KMEMLEAK
14 select HAVE_GENERIC_HARDIRQS
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
30 # FIXME: investigate whether we need/want these options.
31 # select HAVE_IOREMAP_PROT
32 # select HAVE_OPTPROBES
33 # select HAVE_REGS_AND_STACK_ACCESS_API
34 # select HAVE_HW_BREAKPOINT
36 # select HAVE_USER_RETURN_NOTIFIER
38 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
39 # config HUGETLB_PAGE_SIZE_VARIABLE
47 config HAVE_ARCH_ALLOC_REMAP
50 config HAVE_SETUP_PER_CPU_AREA
53 config NEED_PER_CPU_PAGE_FIRST_CHUNK
56 config SYS_SUPPORTS_HUGETLBFS
59 # Support for additional huge page sizes besides HPAGE_SIZE.
60 # The software support is currently only present in the TILE-Gx
61 # hypervisor. TILEPro in any case does not support page sizes
62 # larger than the default HPAGE_SIZE.
63 config HUGETLB_SUPER_PAGES
64 depends on HUGETLB_PAGE && TILEGX
67 config GENERIC_TIME_VSYSCALL
70 # FIXME: tilegx can implement a more efficient rwsem.
71 config RWSEM_GENERIC_SPINLOCK
74 # We only support gcc 4.4 and above, so this should work.
75 config ARCH_SUPPORTS_OPTIMIZED_INLINING
78 config ARCH_PHYS_ADDR_T_64BIT
81 config ARCH_DMA_ADDR_T_64BIT
84 config NEED_DMA_MAP_STATE
87 config ARCH_HAS_DMA_SET_COHERENT_MASK
90 config LOCKDEP_SUPPORT
93 config STACKTRACE_SUPPORT
97 # We use discontigmem for now; at some point we may want to switch
98 # to sparsemem (Tilera bug 7996).
99 config ARCH_DISCONTIGMEM_ENABLE
102 config ARCH_DISCONTIGMEM_DEFAULT
105 config TRACE_IRQFLAGS_SUPPORT
111 # SMP is required for Tilera Linux.
118 select HVC_IRQ if TILEGX
122 bool "Building for TILE-Gx (64-bit) processor"
123 select HAVE_FUNCTION_TRACER
124 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
125 select HAVE_FUNCTION_GRAPH_TRACER
126 select HAVE_DYNAMIC_FTRACE
127 select HAVE_FTRACE_MCOUNT_RECORD
129 select HAVE_KRETPROBES
137 config ARCH_DEFCONFIG
139 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
140 default "arch/tile/configs/tilegx_defconfig" if TILEGX
142 source "init/Kconfig"
144 source "kernel/Kconfig.freezer"
146 menu "Tilera-specific configuration"
149 int "Maximum number of tiles (2-255)"
154 Building with 64 is the recommended value, but a slightly
155 smaller kernel memory footprint results from using a smaller
156 value on chips with fewer tiles.
161 prompt "Kernel page size"
162 default PAGE_SIZE_64KB
164 This lets you select the page size of the kernel. For best
165 performance on memory-intensive applications, a page size of 64KB
166 is recommended. For workloads involving many small files, many
167 connections, etc., it may be better to select 16KB, which uses
168 memory more efficiently at some cost in TLB performance.
170 Note that this option is TILE-Gx specific; currently
171 TILEPro page size is set by rebuilding the hypervisor.
173 config PAGE_SIZE_16KB
176 config PAGE_SIZE_64KB
183 source "kernel/Kconfig.hz"
186 bool "kexec system call"
188 kexec is a system call that implements the ability to shutdown your
189 current kernel, and to start another kernel. It is like a reboot
190 but it is independent of the system firmware. It is used
191 to implement the "mboot" Tilera booter.
193 The name comes from the similarity to the exec system call.
196 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
198 select COMPAT_BINFMT_ELF
201 If enabled, the kernel will support running TILE-Gx binaries
202 that were built with the -m32 option.
204 config SYSVIPC_COMPAT
206 depends on COMPAT && SYSVIPC
208 # We do not currently support disabling HIGHMEM on tile64 and tilepro.
210 bool # "Support for more than 512 MB of RAM"
213 Linux can use the full amount of RAM in the system by
214 default. However, the address space of TILE processors is
215 only 4 Gigabytes large. That means that, if you have a large
216 amount of physical memory, not all of it can be "permanently
217 mapped" by the kernel. The physical memory that's not
218 permanently mapped is called "high memory".
220 If you are compiling a kernel which will never run on a
221 machine with more than 512 MB total physical RAM, answer
222 "false" here. This will result in the kernel mapping all of
223 physical memory into the top 1 GB of virtual memory space.
225 If unsure, say "true".
233 config NEED_SG_DMA_LENGTH
240 select NEED_SG_DMA_LENGTH
241 select ARCH_HAS_DMA_SET_COHERENT_MASK
243 # We do not currently support disabling NUMA.
245 bool # "NUMA Memory Allocation and Scheduler Support"
246 depends on SMP && DISCONTIGMEM
249 NUMA memory allocation is required for TILE processors
250 unless booting with memory striping enabled in the
251 hypervisor, or with only a single memory controller.
252 It is recommended that this option always be enabled.
255 int "Log base 2 of the max number of memory controllers"
257 depends on NEED_MULTIPLE_NODES
259 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
260 In a system with more controllers, this value should be raised.
264 prompt "Memory split" if EXPERT
267 Select the desired split between kernel and user memory.
269 If the address range available to the kernel is less than the
270 physical memory installed, the remaining memory will be available
271 as "high memory". Accessing high memory is a little more costly
272 than low memory, as it needs to be mapped into the kernel first.
273 Note that increasing the kernel address space limits the range
274 available to user programs, making the address space there
275 tighter. Selecting anything other than the default 3G/1G split
276 will also likely make your kernel incompatible with binary-only
279 If you are not absolutely sure what you are doing, leave this
283 bool "3.75G/0.25G user/kernel split (no kernel networking)"
285 bool "3.5G/0.5G user/kernel split"
287 bool "3G/1G user/kernel split"
289 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
291 bool "2.5G/1.5G user/kernel split"
293 bool "2.25G/1.75G user/kernel split"
295 bool "2G/2G user/kernel split"
297 bool "1G/3G user/kernel split"
303 default 0xF0000000 if VMSPLIT_3_75G
304 default 0xE0000000 if VMSPLIT_3_5G
305 default 0xB0000000 if VMSPLIT_2_75G
306 default 0xA0000000 if VMSPLIT_2_5G
307 default 0x90000000 if VMSPLIT_2_25G
308 default 0x80000000 if VMSPLIT_2G
309 default 0x40000000 if VMSPLIT_1G
314 source "kernel/Kconfig.preempt"
317 bool "Built-in kernel command line"
320 Allow for specifying boot arguments to the kernel at
321 build time. On some systems (e.g. embedded ones), it is
322 necessary or convenient to provide some or all of the
323 kernel boot arguments with the kernel itself (that is,
324 to not rely on the boot loader to provide them.)
326 To compile command line arguments into the kernel,
327 set this option to 'Y', then fill in the
328 the boot arguments in CONFIG_CMDLINE.
330 Systems with fully functional boot loaders (e.g. mboot, or
331 if booting over PCI) should leave this option set to 'N'.
334 string "Built-in kernel command string"
335 depends on CMDLINE_BOOL
338 Enter arguments here that should be compiled into the kernel
339 image and used at boot time. If the boot loader provides a
340 command line at boot time, it is appended to this string to
341 form the full kernel command line, when the system boots.
343 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
344 change this behavior.
346 In most cases, the command line (whether built-in or provided
347 by the boot loader) should specify the device for the root
350 config CMDLINE_OVERRIDE
351 bool "Built-in command line overrides boot loader arguments"
353 depends on CMDLINE_BOOL
355 Set this option to 'Y' to have the kernel ignore the boot loader
356 command line, and use ONLY the built-in command line.
358 This is used to work around broken boot loaders. This should
359 be set to 'N' under normal conditions.
361 config VMALLOC_RESERVE
366 bool "Hardwall support to allow access to user dynamic network"
370 int "Processor protection level for kernel"
375 Since MDE 4.2, the Tilera hypervisor runs the kernel
376 at PL2 by default. If running under an older hypervisor,
377 or as a KVM guest, you must run at PL1. (The current
378 hypervisor may also be recompiled with "make HV_PL=2" to
379 allow it to run a kernel at PL1, but clients running at PL1
380 are not expected to be supported indefinitely.)
382 If you're not sure, don't change the default.
384 source "arch/tile/gxio/Kconfig"
386 endmenu # Tilera-specific configuration
394 select GENERIC_PCI_IOMAP
395 select TILE_GXIO_TRIO if TILEGX
396 select ARCH_SUPPORTS_MSI if TILEGX
397 select PCI_MSI if TILEGX
399 Enable PCI root complex support, so PCIe endpoint devices can
400 be attached to the Tile chip. Many, but not all, PCI devices
401 are supported under Tilera's root complex driver.
413 bool "PCI I/O space support"
418 Enable PCI I/O space support on TILEGx. Since the PCI I/O space
419 is used by few modern PCIe endpoint devices, its support is disabled
420 by default to save the TRIO PIO Region resource for other purposes.
422 source "drivers/pci/Kconfig"
424 source "drivers/pci/pcie/Kconfig"
427 tristate "Tilera USB host adapter support"
431 select TILE_GXIO_USB_HOST
433 Provides USB host adapter support for the built-in EHCI and OHCI
434 interfaces on TILE-Gx chips.
436 source "drivers/pci/hotplug/Kconfig"
440 menu "Executable file formats"
442 source "fs/Kconfig.binfmt"
448 source "drivers/Kconfig"
452 source "arch/tile/Kconfig.debug"
454 source "security/Kconfig"
456 source "crypto/Kconfig"
460 source "arch/tile/kvm/Kconfig"