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
33 select HAVE_DEBUG_STACKOVERFLOW
35 config STACKTRACE_SUPPORT
38 config LOCKDEP_SUPPORT
41 config HAVE_LATENCYTOP_SUPPORT
44 config RWSEM_GENERIC_SPINLOCK
47 config RWSEM_XCHGADD_ALGORITHM
50 config GENERIC_HWEIGHT
53 config GENERIC_CALIBRATE_DELAY
61 source "kernel/Kconfig.freezer"
63 menu "Processor type and features"
72 bool "Enable CPU hotplug support"
75 Say Y here to allow turning CPUs off and on. CPUs can be
76 controlled through /sys/devices/system/cpu.
78 Say N if you want to disable CPU hotplug.
81 bool "High Memory Support"
83 The address space of Meta processors is only 4 Gigabytes large
84 and it has to accommodate user address space, kernel address
85 space as well as some memory mapped IO. That means that, if you
86 have a large amount of physical memory and/or IO, not all of the
87 memory can be "permanently mapped" by the kernel. The physical
88 memory that is not permanently mapped is called "high memory".
90 Depending on the selected kernel/user memory split, minimum
91 vmalloc space and actual amount of RAM, you may not need this
92 option which should result in a slightly faster kernel.
96 source "arch/metag/mm/Kconfig"
98 source "arch/metag/Kconfig.soc"
103 Select this from the SoC config symbol to indicate that it contains a
109 Select this from the SoC config symbol to indicate that it contains a
113 bool "Symmetric multi-processing support"
114 depends on METAG_META21 && METAG_META21_MMU
115 select USE_GENERIC_SMP_HELPERS
117 This enables support for systems with more than one thread running
118 Linux. If you have a system with only one thread running Linux,
119 say N. Otherwise, say Y.
122 int "Maximum number of CPUs (2-4)" if SMP
127 config METAG_SMP_WRITE_REORDERING
130 This attempts to prevent cache-memory incoherence due to external
131 reordering of writes from different hardware threads when SMP is
132 enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
133 attempt to catch some of the cases, and also before writes to shared
134 memory in LOCK1 protected atomics and spinlocks.
135 This will not completely prevent cache incoherency on affected cores.
137 config METAG_LNKGET_AROUND_CACHE
139 depends on METAG_META21
141 This indicates that the LNKGET/LNKSET instructions go around the
142 cache, which requires some extra cache flushes when the memory needs
143 to be accessed by normal GET/SET instructions too.
146 prompt "Atomicity primitive"
147 default METAG_ATOMICITY_LNKGET
149 This option selects the mechanism for performing atomic operations.
151 config METAG_ATOMICITY_IRQSOFF
155 This option disables interrupts to achieve atomicity. This mechanism
158 config METAG_ATOMICITY_LNKGET
159 depends on METAG_META21
162 This option uses the LNKGET and LNKSET instructions to achieve
163 atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
164 Choose this option if your system requires low latency.
166 config METAG_ATOMICITY_LOCK1
170 This option uses the LOCK1 instruction for atomicity. This is mainly
171 provided as a debugging aid if the lnkget/lnkset atomicity primitive
172 isn't working properly.
178 depends on METAG_META21
181 This option allows processes to use FPU hardware available with this
182 CPU. If this option is not enabled FPU registers will not be saved
183 and restored on context-switch.
185 If you plan on running programs which are compiled to use hard floats
191 This option allows processes to use DSP hardware available
192 with this CPU. If this option is not enabled DSP registers
193 will not be saved and restored on context-switch.
195 If you plan on running DSP programs say Y here.
197 config METAG_PERFCOUNTER_IRQS
198 bool "PerfCounters interrupt support"
199 depends on METAG_META21
201 This option enables using interrupts to collect information from
202 Performance Counters. This option is supported in new META21
203 (starting from HTP265).
205 When disabled, Performance Counters information will be collected
206 based on Timer Interrupt.
208 config HW_PERF_EVENTS
209 def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
214 Say Y if you plan to use a DA debug adapter with Linux. The presence
215 of the DA will be detected automatically at boot, so it is safe to say
216 Y to this option even when booting without a DA.
218 This enables support for services provided by DA JTAG debug adapters,
220 - communication over DA channels (such as the console driver).
221 - use of the DA filesystem.
225 config METAG_BUILTIN_DTB
226 bool "Embed DTB in kernel image"
229 Embeds a device tree binary in the kernel image.
231 config METAG_BUILTIN_DTB_NAME
232 string "Built in DTB"
233 depends on METAG_BUILTIN_DTB
235 Set the name of the DTB to embed (leave blank to pick one
236 automatically based on kernel configuration).
239 bool "Default bootloader kernel arguments"
242 string "Kernel command line"
243 depends on CMDLINE_BOOL
245 On some architectures there is currently no way for the boot loader
246 to pass arguments to the kernel. For these architectures, you should
247 supply some command-line options at build time by entering them
251 bool "Force default kernel command string"
252 depends on CMDLINE_BOOL
254 Set this to have arguments from the default kernel command string
255 override those passed by the boot loader.
259 source "kernel/Kconfig.preempt"
261 source kernel/Kconfig.hz
265 menu "Power management options"
267 source kernel/power/Kconfig
271 menu "Executable file formats"
273 source "fs/Kconfig.binfmt"
279 source "drivers/Kconfig"
283 source "arch/metag/Kconfig.debug"
285 source "security/Kconfig"
287 source "crypto/Kconfig"