4 select GENERIC_ATOMIC64
5 select GENERIC_CLOCKEVENTS
6 select GENERIC_IRQ_SHOW
7 select GENERIC_SMP_IDLE_THREAD
8 select HAVE_64BIT_ALIGNED_ACCESS
9 select HAVE_ARCH_TRACEHOOK
10 select HAVE_C_RECORDMCOUNT
11 select HAVE_DEBUG_KMEMLEAK
12 select HAVE_DYNAMIC_FTRACE
13 select HAVE_FTRACE_MCOUNT_RECORD
14 select HAVE_FUNCTION_TRACER
15 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
16 select HAVE_GENERIC_HARDIRQS
17 select HAVE_KERNEL_BZIP2
18 select HAVE_KERNEL_GZIP
19 select HAVE_KERNEL_LZO
22 select HAVE_MEMBLOCK_NODE_MAP
23 select HAVE_MOD_ARCH_SPECIFIC
25 select HAVE_PERF_EVENTS
26 select HAVE_SYSCALL_TRACEPOINTS
27 select HAVE_UNDERSCORE_SYMBOL_PREFIX
29 select MODULES_USE_ELF_RELA
31 select OF_EARLY_FLATTREE
34 config STACKTRACE_SUPPORT
37 config LOCKDEP_SUPPORT
40 config HAVE_LATENCYTOP_SUPPORT
43 config RWSEM_GENERIC_SPINLOCK
46 config RWSEM_XCHGADD_ALGORITHM
49 config GENERIC_HWEIGHT
52 config GENERIC_CALIBRATE_DELAY
63 source "kernel/Kconfig.freezer"
65 menu "Processor type and features"
74 bool "Enable CPU hotplug support"
77 Say Y here to allow turning CPUs off and on. CPUs can be
78 controlled through /sys/devices/system/cpu.
80 Say N if you want to disable CPU hotplug.
83 bool "High Memory Support"
85 The address space of Meta processors is only 4 Gigabytes large
86 and it has to accommodate user address space, kernel address
87 space as well as some memory mapped IO. That means that, if you
88 have a large amount of physical memory and/or IO, not all of the
89 memory can be "permanently mapped" by the kernel. The physical
90 memory that is not permanently mapped is called "high memory".
92 Depending on the selected kernel/user memory split, minimum
93 vmalloc space and actual amount of RAM, you may not need this
94 option which should result in a slightly faster kernel.
98 source "arch/metag/mm/Kconfig"
100 source "arch/metag/Kconfig.soc"
105 Select this from the SoC config symbol to indicate that it contains a
111 Select this from the SoC config symbol to indicate that it contains a
115 bool "Symmetric multi-processing support"
116 depends on METAG_META21 && METAG_META21_MMU
117 select USE_GENERIC_SMP_HELPERS
119 This enables support for systems with more than one thread running
120 Linux. If you have a system with only one thread running Linux,
121 say N. Otherwise, say Y.
124 int "Maximum number of CPUs (2-4)" if SMP
129 config METAG_SMP_WRITE_REORDERING
132 This attempts to prevent cache-memory incoherence due to external
133 reordering of writes from different hardware threads when SMP is
134 enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
135 attempt to catch some of the cases, and also before writes to shared
136 memory in LOCK1 protected atomics and spinlocks.
137 This will not completely prevent cache incoherency on affected cores.
139 config METAG_LNKGET_AROUND_CACHE
141 depends on METAG_META21
143 This indicates that the LNKGET/LNKSET instructions go around the
144 cache, which requires some extra cache flushes when the memory needs
145 to be accessed by normal GET/SET instructions too.
148 prompt "Atomicity primitive"
149 default METAG_ATOMICITY_LNKGET
151 This option selects the mechanism for performing atomic operations.
153 config METAG_ATOMICITY_IRQSOFF
157 This option disables interrupts to achieve atomicity. This mechanism
160 config METAG_ATOMICITY_LNKGET
161 depends on METAG_META21
164 This option uses the LNKGET and LNKSET instructions to achieve
165 atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
166 Choose this option if your system requires low latency.
168 config METAG_ATOMICITY_LOCK1
172 This option uses the LOCK1 instruction for atomicity. This is mainly
173 provided as a debugging aid if the lnkget/lnkset atomicity primitive
174 isn't working properly.
180 depends on METAG_META21
183 This option allows processes to use FPU hardware available with this
184 CPU. If this option is not enabled FPU registers will not be saved
185 and restored on context-switch.
187 If you plan on running programs which are compiled to use hard floats
193 This option allows processes to use DSP hardware available
194 with this CPU. If this option is not enabled DSP registers
195 will not be saved and restored on context-switch.
197 If you plan on running DSP programs say Y here.
199 config METAG_PERFCOUNTER_IRQS
200 bool "PerfCounters interrupt support"
201 depends on METAG_META21
203 This option enables using interrupts to collect information from
204 Performance Counters. This option is supported in new META21
205 (starting from HTP265).
207 When disabled, Performance Counters information will be collected
208 based on Timer Interrupt.
210 config HW_PERF_EVENTS
211 def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
216 Say Y if you plan to use a DA debug adapter with Linux. The presence
217 of the DA will be detected automatically at boot, so it is safe to say
218 Y to this option even when booting without a DA.
220 This enables support for services provided by DA JTAG debug adapters,
222 - communication over DA channels (such as the console driver).
223 - use of the DA filesystem.
227 config METAG_BUILTIN_DTB
228 bool "Embed DTB in kernel image"
231 Embeds a device tree binary in the kernel image.
233 config METAG_BUILTIN_DTB_NAME
234 string "Built in DTB"
235 depends on METAG_BUILTIN_DTB
237 Set the name of the DTB to embed (leave blank to pick one
238 automatically based on kernel configuration).
241 bool "Default bootloader kernel arguments"
244 string "Kernel command line"
245 depends on CMDLINE_BOOL
247 On some architectures there is currently no way for the boot loader
248 to pass arguments to the kernel. For these architectures, you should
249 supply some command-line options at build time by entering them
253 bool "Force default kernel command string"
254 depends on CMDLINE_BOOL
256 Set this to have arguments from the default kernel command string
257 override those passed by the boot loader.
261 source "kernel/Kconfig.preempt"
263 source kernel/Kconfig.hz
267 menu "Power management options"
269 source kernel/power/Kconfig
273 menu "Executable file formats"
275 source "fs/Kconfig.binfmt"
281 source "drivers/Kconfig"
285 source "arch/metag/Kconfig.debug"
287 source "security/Kconfig"
289 source "crypto/Kconfig"