1 # SPDX-License-Identifier: GPL-2.0-only !! 1 # SPDX-License-Identifier: GPL-2.0
2 # !! 2 config MIPS
3 # For a description of the syntax of this conf <<
4 # see Documentation/kbuild/kconfig-language.rs <<
5 # <<
6 <<
7 config 64BIT <<
8 bool 3 bool
9 !! 4 default y
10 config 32BIT !! 5 select ARCH_32BIT_OFF_T if !64BIT
11 bool !! 6 select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT
12 !! 7 select ARCH_HAS_CPU_FINALIZE_INIT
13 config RISCV !! 8 select ARCH_HAS_CURRENT_STACK_POINTER if !CC_IS_CLANG || CLANG_VERSION >= 140000
14 def_bool y !! 9 select ARCH_HAS_DEBUG_VIRTUAL if !64BIT
15 select ACPI_GENERIC_GSI if ACPI <<
16 select ACPI_MCFG if (ACPI && PCI) <<
17 select ACPI_PPTT if ACPI <<
18 select ACPI_REDUCED_HARDWARE_ONLY if A <<
19 select ACPI_SPCR_TABLE if ACPI <<
20 select ARCH_DMA_DEFAULT_COHERENT <<
21 select ARCH_ENABLE_HUGEPAGE_MIGRATION <<
22 select ARCH_ENABLE_MEMORY_HOTPLUG if S <<
23 select ARCH_ENABLE_MEMORY_HOTREMOVE if <<
24 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if <<
25 select ARCH_ENABLE_THP_MIGRATION if TR <<
26 select ARCH_HAS_BINFMT_FLAT <<
27 select ARCH_HAS_CURRENT_STACK_POINTER <<
28 select ARCH_HAS_DEBUG_VIRTUAL if MMU <<
29 select ARCH_HAS_DEBUG_VM_PGTABLE <<
30 select ARCH_HAS_DEBUG_WX <<
31 select ARCH_HAS_FAST_MULTIPLIER <<
32 select ARCH_HAS_FORTIFY_SOURCE 10 select ARCH_HAS_FORTIFY_SOURCE
33 select ARCH_HAS_GCOV_PROFILE_ALL <<
34 select ARCH_HAS_GIGANTIC_PAGE <<
35 select ARCH_HAS_KCOV 11 select ARCH_HAS_KCOV
36 select ARCH_HAS_KERNEL_FPU_SUPPORT if !! 12 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE if !EVA
37 select ARCH_HAS_MEMBARRIER_CALLBACKS !! 13 select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI)
38 select ARCH_HAS_MEMBARRIER_SYNC_CORE !! 14 select ARCH_HAS_STRNCPY_FROM_USER
39 select ARCH_HAS_MMIOWB !! 15 select ARCH_HAS_STRNLEN_USER
40 select ARCH_HAS_NON_OVERLAPPING_ADDRES <<
41 select ARCH_HAS_PMEM_API <<
42 select ARCH_HAS_PREPARE_SYNC_CORE_CMD <<
43 select ARCH_HAS_PTE_DEVMAP if 64BIT && <<
44 select ARCH_HAS_PTE_SPECIAL <<
45 select ARCH_HAS_SET_DIRECT_MAP if MMU <<
46 select ARCH_HAS_SET_MEMORY if MMU <<
47 select ARCH_HAS_STRICT_KERNEL_RWX if M <<
48 select ARCH_HAS_STRICT_MODULE_RWX if M <<
49 select ARCH_HAS_SYNC_CORE_BEFORE_USERM <<
50 select ARCH_HAS_SYSCALL_WRAPPER <<
51 select ARCH_HAS_TICK_BROADCAST if GENE 16 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
52 select ARCH_HAS_UBSAN !! 17 select ARCH_HAS_UBSAN_SANITIZE_ALL
53 select ARCH_HAS_VDSO_DATA !! 18 select ARCH_HAS_GCOV_PROFILE_ALL
54 select ARCH_KEEP_MEMBLOCK if ACPI !! 19 select ARCH_KEEP_MEMBLOCK
55 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABL !! 20 select ARCH_USE_BUILTIN_BSWAP
56 select ARCH_OPTIONAL_KERNEL_RWX if ARC <<
57 select ARCH_OPTIONAL_KERNEL_RWX_DEFAUL <<
58 select ARCH_STACKWALK <<
59 select ARCH_SUPPORTS_ATOMIC_RMW <<
60 select ARCH_SUPPORTS_CFI_CLANG <<
61 select ARCH_SUPPORTS_DEBUG_PAGEALLOC i <<
62 select ARCH_SUPPORTS_HUGETLBFS if MMU <<
63 # LLD >= 14: https://github.com/llvm/l <<
64 select ARCH_SUPPORTS_LTO_CLANG if LLD_ <<
65 select ARCH_SUPPORTS_LTO_CLANG_THIN if <<
66 select ARCH_SUPPORTS_PAGE_TABLE_CHECK <<
67 select ARCH_SUPPORTS_PER_VMA_LOCK if M <<
68 select ARCH_SUPPORTS_RT <<
69 select ARCH_SUPPORTS_SHADOW_CALL_STACK <<
70 select ARCH_USE_CMPXCHG_LOCKREF if 64B 21 select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
71 select ARCH_USE_MEMTEST 22 select ARCH_USE_MEMTEST
72 select ARCH_USE_QUEUED_RWLOCKS 23 select ARCH_USE_QUEUED_RWLOCKS
73 select ARCH_USE_SYM_ANNOTATIONS !! 24 select ARCH_USE_QUEUED_SPINLOCKS
74 select ARCH_USES_CFI_TRAPS if CFI_CLAN !! 25 select ARCH_SUPPORTS_HUGETLBFS if CPU_SUPPORTS_HUGEPAGES
75 select ARCH_WANT_BATCHED_UNMAP_TLB_FLU <<
76 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ 26 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
77 select ARCH_WANT_FRAME_POINTERS !! 27 select ARCH_WANT_IPC_PARSE_VERSION
78 select ARCH_WANT_GENERAL_HUGETLB if !R !! 28 select ARCH_WANT_LD_ORPHAN_WARN
79 select ARCH_WANT_HUGE_PMD_SHARE if 64B !! 29 select BUILDTIME_TABLE_SORT
80 select ARCH_WANT_LD_ORPHAN_WARN if !XI <<
81 select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP <<
82 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM <<
83 select ARCH_WANTS_NO_INSTR <<
84 select ARCH_WANTS_THP_SWAP if HAVE_ARC <<
85 select BINFMT_FLAT_NO_DATA_START_OFFSE <<
86 select BUILDTIME_TABLE_SORT if MMU <<
87 select CLINT_TIMER if RISCV_M_MODE <<
88 select CLONE_BACKWARDS 30 select CLONE_BACKWARDS
89 select COMMON_CLK !! 31 select CPU_NO_EFFICIENT_FFS if (TARGET_ISA_REV < 1)
90 select CPU_PM if CPU_IDLE || HIBERNATI !! 32 select CPU_PM if CPU_IDLE
91 select EDAC_SUPPORT <<
92 select FRAME_POINTER if PERF_EVENTS || <<
93 select FTRACE_MCOUNT_USE_PATCHABLE_FUN <<
94 select GENERIC_ARCH_TOPOLOGY <<
95 select GENERIC_ATOMIC64 if !64BIT 33 select GENERIC_ATOMIC64 if !64BIT
96 select GENERIC_CLOCKEVENTS_BROADCAST i !! 34 select GENERIC_CMOS_UPDATE
97 select GENERIC_CPU_DEVICES !! 35 select GENERIC_CPU_AUTOPROBE
98 select GENERIC_CPU_VULNERABILITIES !! 36 select GENERIC_GETTIMEOFDAY
99 select GENERIC_EARLY_IOREMAP !! 37 select GENERIC_IOMAP
100 select GENERIC_ENTRY !! 38 select GENERIC_IRQ_PROBE
101 select GENERIC_GETTIMEOFDAY if HAVE_GE <<
102 select GENERIC_IDLE_POLL_SETUP <<
103 select GENERIC_IOREMAP if MMU <<
104 select GENERIC_IRQ_IPI if SMP <<
105 select GENERIC_IRQ_IPI_MUX if SMP <<
106 select GENERIC_IRQ_MULTI_HANDLER <<
107 select GENERIC_IRQ_SHOW 39 select GENERIC_IRQ_SHOW
108 select GENERIC_IRQ_SHOW_LEVEL !! 40 select GENERIC_ISA_DMA if EISA
109 select GENERIC_LIB_DEVMEM_IS_ALLOWED !! 41 select GENERIC_LIB_ASHLDI3
110 select GENERIC_PCI_IOMAP !! 42 select GENERIC_LIB_ASHRDI3
111 select GENERIC_PTDUMP if MMU !! 43 select GENERIC_LIB_CMPDI2
112 select GENERIC_SCHED_CLOCK !! 44 select GENERIC_LIB_LSHRDI3
>> 45 select GENERIC_LIB_UCMPDI2
>> 46 select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
113 select GENERIC_SMP_IDLE_THREAD 47 select GENERIC_SMP_IDLE_THREAD
114 select GENERIC_TIME_VSYSCALL if MMU && !! 48 select GENERIC_IDLE_POLL_SETUP
115 select GENERIC_VDSO_TIME_NS if HAVE_GE !! 49 select GENERIC_TIME_VSYSCALL
116 select HARDIRQS_SW_RESEND !! 50 select GUP_GET_PXX_LOW_HIGH if CPU_MIPS32 && PHYS_ADDR_T_64BIT
117 select HAS_IOPORT if MMU !! 51 select HAS_IOPORT if !NO_IOPORT_MAP || ISA
118 select HAVE_ARCH_AUDITSYSCALL !! 52 select HAVE_ARCH_COMPILER_H
119 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ !! 53 select HAVE_ARCH_JUMP_LABEL
120 select HAVE_ARCH_HUGE_VMAP if MMU && 6 !! 54 select HAVE_ARCH_KGDB if MIPS_FP_SUPPORT
121 select HAVE_ARCH_JUMP_LABEL if !XIP_KE <<
122 select HAVE_ARCH_JUMP_LABEL_RELATIVE i <<
123 select HAVE_ARCH_KASAN if MMU && 64BIT <<
124 select HAVE_ARCH_KASAN_VMALLOC if MMU <<
125 select HAVE_ARCH_KFENCE if MMU && 64BI <<
126 select HAVE_ARCH_KGDB if !XIP_KERNEL <<
127 select HAVE_ARCH_KGDB_QXFER_PKT <<
128 select HAVE_ARCH_MMAP_RND_BITS if MMU 55 select HAVE_ARCH_MMAP_RND_BITS if MMU
129 select HAVE_ARCH_MMAP_RND_COMPAT_BITS !! 56 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
130 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
131 select HAVE_ARCH_SECCOMP_FILTER 57 select HAVE_ARCH_SECCOMP_FILTER
132 select HAVE_ARCH_STACKLEAK <<
133 select HAVE_ARCH_THREAD_STRUCT_WHITELI <<
134 select HAVE_ARCH_TRACEHOOK 58 select HAVE_ARCH_TRACEHOOK
135 select HAVE_ARCH_TRANSPARENT_HUGEPAGE !! 59 select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
136 select HAVE_ARCH_USERFAULTFD_MINOR if <<
137 select HAVE_ARCH_VMAP_STACK if MMU && <<
138 select HAVE_ASM_MODVERSIONS 60 select HAVE_ASM_MODVERSIONS
139 select HAVE_CONTEXT_TRACKING_USER 61 select HAVE_CONTEXT_TRACKING_USER
>> 62 select HAVE_TIF_NOHZ
>> 63 select HAVE_C_RECORDMCOUNT
140 select HAVE_DEBUG_KMEMLEAK 64 select HAVE_DEBUG_KMEMLEAK
141 select HAVE_DMA_CONTIGUOUS if MMU !! 65 select HAVE_DEBUG_STACKOVERFLOW
142 select HAVE_DYNAMIC_FTRACE if !XIP_KER !! 66 select HAVE_DMA_CONTIGUOUS
143 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT !! 67 select HAVE_DYNAMIC_FTRACE
144 select HAVE_DYNAMIC_FTRACE_WITH_ARGS i !! 68 select HAVE_EBPF_JIT if !CPU_MICROMIPS
145 select HAVE_FTRACE_MCOUNT_RECORD if !X !! 69 select HAVE_EXIT_THREAD
>> 70 select HAVE_FAST_GUP
>> 71 select HAVE_FTRACE_MCOUNT_RECORD
146 select HAVE_FUNCTION_GRAPH_TRACER 72 select HAVE_FUNCTION_GRAPH_TRACER
147 select HAVE_FUNCTION_GRAPH_RETVAL if H !! 73 select HAVE_FUNCTION_TRACER
148 select HAVE_FUNCTION_TRACER if !XIP_KE <<
149 select HAVE_EBPF_JIT if MMU <<
150 select HAVE_GUP_FAST if MMU <<
151 select HAVE_FUNCTION_ARG_ACCESS_API <<
152 select HAVE_FUNCTION_ERROR_INJECTION <<
153 select HAVE_GCC_PLUGINS 74 select HAVE_GCC_PLUGINS
154 select HAVE_GENERIC_VDSO if MMU && 64B !! 75 select HAVE_GENERIC_VDSO
>> 76 select HAVE_IOREMAP_PROT
>> 77 select HAVE_IRQ_EXIT_ON_IRQ_STACK
155 select HAVE_IRQ_TIME_ACCOUNTING 78 select HAVE_IRQ_TIME_ACCOUNTING
156 select HAVE_KERNEL_BZIP2 if !XIP_KERNE !! 79 select HAVE_KPROBES
157 select HAVE_KERNEL_GZIP if !XIP_KERNEL !! 80 select HAVE_KRETPROBES
158 select HAVE_KERNEL_LZ4 if !XIP_KERNEL !! 81 select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
159 select HAVE_KERNEL_LZMA if !XIP_KERNEL !! 82 select HAVE_MOD_ARCH_SPECIFIC
160 select HAVE_KERNEL_LZO if !XIP_KERNEL !! 83 select HAVE_NMI
161 select HAVE_KERNEL_UNCOMPRESSED if !XI <<
162 select HAVE_KERNEL_ZSTD if !XIP_KERNEL <<
163 select HAVE_KERNEL_XZ if !XIP_KERNEL & <<
164 select HAVE_KPROBES if !XIP_KERNEL <<
165 select HAVE_KRETPROBES if !XIP_KERNEL <<
166 # https://github.com/ClangBuiltLinux/l <<
167 select HAVE_LD_DEAD_CODE_DATA_ELIMINAT <<
168 select HAVE_MOVE_PMD <<
169 select HAVE_MOVE_PUD <<
170 select HAVE_PAGE_SIZE_4KB <<
171 select HAVE_PCI <<
172 select HAVE_PERF_EVENTS 84 select HAVE_PERF_EVENTS
173 select HAVE_PERF_REGS 85 select HAVE_PERF_REGS
174 select HAVE_PERF_USER_STACK_DUMP 86 select HAVE_PERF_USER_STACK_DUMP
175 select HAVE_POSIX_CPU_TIMERS_TASK_WORK <<
176 select HAVE_PREEMPT_DYNAMIC_KEY if !XI <<
177 select HAVE_REGS_AND_STACK_ACCESS_API 87 select HAVE_REGS_AND_STACK_ACCESS_API
178 select HAVE_RETHOOK if !XIP_KERNEL <<
179 select HAVE_RSEQ 88 select HAVE_RSEQ
180 select HAVE_RUST if RUSTC_SUPPORTS_RIS !! 89 select HAVE_SPARSE_SYSCALL_NR
181 select HAVE_SAMPLE_FTRACE_DIRECT <<
182 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
183 select HAVE_STACKPROTECTOR 90 select HAVE_STACKPROTECTOR
184 select HAVE_SYSCALL_TRACEPOINTS 91 select HAVE_SYSCALL_TRACEPOINTS
185 select HOTPLUG_CORE_SYNC_DEAD if HOTPL !! 92 select HAVE_VIRT_CPU_ACCOUNTING_GEN if 64BIT || !SMP
186 select IRQ_DOMAIN <<
187 select IRQ_FORCED_THREADING 93 select IRQ_FORCED_THREADING
188 select KASAN_VMALLOC if KASAN !! 94 select ISA if EISA
189 select LOCK_MM_AND_FIND_VMA 95 select LOCK_MM_AND_FIND_VMA
190 select MMU_GATHER_RCU_TABLE_FREE if SM !! 96 select MODULES_USE_ELF_REL if MODULES
191 select MODULES_USE_ELF_RELA if MODULES !! 97 select MODULES_USE_ELF_RELA if MODULES && 64BIT
192 select OF !! 98 select PERF_USE_VMALLOC
193 select OF_EARLY_FLATTREE !! 99 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
194 select OF_IRQ !! 100 select RTC_LIB
195 select PCI_DOMAINS_GENERIC if PCI <<
196 select PCI_ECAM if (ACPI && PCI) <<
197 select PCI_MSI if PCI <<
198 select RISCV_ALTERNATIVE if !XIP_KERNE <<
199 select RISCV_APLIC <<
200 select RISCV_IMSIC <<
201 select RISCV_INTC <<
202 select RISCV_TIMER if RISCV_SBI <<
203 select SIFIVE_PLIC <<
204 select SPARSE_IRQ <<
205 select SYSCTL_EXCEPTION_TRACE 101 select SYSCTL_EXCEPTION_TRACE
206 select THREAD_INFO_IN_TASK <<
207 select TRACE_IRQFLAGS_SUPPORT 102 select TRACE_IRQFLAGS_SUPPORT
208 select UACCESS_MEMCPY if !MMU !! 103 select ARCH_HAS_ELFCORE_COMPAT
209 select USER_STACKTRACE_SUPPORT !! 104 select HAVE_ARCH_KCSAN if 64BIT
>> 105
>> 106 config MIPS_FIXUP_BIGPHYS_ADDR
>> 107 bool
>> 108
>> 109 config MIPS_GENERIC
>> 110 bool
>> 111
>> 112 config MACH_INGENIC
>> 113 bool
>> 114 select SYS_SUPPORTS_32BIT_KERNEL
>> 115 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 116 select SYS_SUPPORTS_ZBOOT
>> 117 select DMA_NONCOHERENT
>> 118 select IRQ_MIPS_CPU
>> 119 select PINCTRL
>> 120 select GPIOLIB
>> 121 select COMMON_CLK
>> 122 select GENERIC_IRQ_CHIP
>> 123 select BUILTIN_DTB if MIPS_NO_APPENDED_DTB
>> 124 select USE_OF
>> 125 select CPU_SUPPORTS_CPUFREQ
>> 126 select MIPS_EXTERNAL_TIMER
>> 127
>> 128 menu "Machine selection"
>> 129
>> 130 choice
>> 131 prompt "System type"
>> 132 default MIPS_GENERIC_KERNEL
>> 133
>> 134 config MIPS_GENERIC_KERNEL
>> 135 bool "Generic board-agnostic MIPS kernel"
>> 136 select MIPS_GENERIC
>> 137 select BOOT_RAW
>> 138 select BUILTIN_DTB
>> 139 select CEVT_R4K
>> 140 select CLKSRC_MIPS_GIC
>> 141 select COMMON_CLK
>> 142 select CPU_MIPSR2_IRQ_EI
>> 143 select CPU_MIPSR2_IRQ_VI
>> 144 select CSRC_R4K
>> 145 select DMA_NONCOHERENT
>> 146 select HAVE_PCI
>> 147 select IRQ_MIPS_CPU
>> 148 select MIPS_AUTO_PFN_OFFSET
>> 149 select MIPS_CPU_SCACHE
>> 150 select MIPS_GIC
>> 151 select MIPS_L1_CACHE_SHIFT_7
>> 152 select NO_EXCEPT_FILL
>> 153 select PCI_DRIVERS_GENERIC
>> 154 select SMP_UP if SMP
>> 155 select SWAP_IO_SPACE
>> 156 select SYS_HAS_CPU_MIPS32_R1
>> 157 select SYS_HAS_CPU_MIPS32_R2
>> 158 select SYS_HAS_CPU_MIPS32_R5
>> 159 select SYS_HAS_CPU_MIPS32_R6
>> 160 select SYS_HAS_CPU_MIPS64_R1
>> 161 select SYS_HAS_CPU_MIPS64_R2
>> 162 select SYS_HAS_CPU_MIPS64_R5
>> 163 select SYS_HAS_CPU_MIPS64_R6
>> 164 select SYS_SUPPORTS_32BIT_KERNEL
>> 165 select SYS_SUPPORTS_64BIT_KERNEL
>> 166 select SYS_SUPPORTS_BIG_ENDIAN
>> 167 select SYS_SUPPORTS_HIGHMEM
>> 168 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 169 select SYS_SUPPORTS_MICROMIPS
>> 170 select SYS_SUPPORTS_MIPS16
>> 171 select SYS_SUPPORTS_MIPS_CPS
>> 172 select SYS_SUPPORTS_MULTITHREADING
>> 173 select SYS_SUPPORTS_RELOCATABLE
>> 174 select SYS_SUPPORTS_SMARTMIPS
>> 175 select SYS_SUPPORTS_ZBOOT
>> 176 select UHI_BOOT
>> 177 select USB_EHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>> 178 select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 179 select USB_OHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>> 180 select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 181 select USB_UHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>> 182 select USB_UHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 183 select USE_OF
>> 184 help
>> 185 Select this to build a kernel which aims to support multiple boards,
>> 186 generally using a flattened device tree passed from the bootloader
>> 187 using the boot protocol defined in the UHI (Unified Hosting
>> 188 Interface) specification.
>> 189
>> 190 config MIPS_ALCHEMY
>> 191 bool "Alchemy processor based machines"
>> 192 select PHYS_ADDR_T_64BIT
>> 193 select CEVT_R4K
>> 194 select CSRC_R4K
>> 195 select IRQ_MIPS_CPU
>> 196 select DMA_NONCOHERENT # Au1000,1500,1100 aren't, rest is
>> 197 select MIPS_FIXUP_BIGPHYS_ADDR if PCI
>> 198 select SYS_HAS_CPU_MIPS32_R1
>> 199 select SYS_SUPPORTS_32BIT_KERNEL
>> 200 select SYS_SUPPORTS_APM_EMULATION
>> 201 select GPIOLIB
>> 202 select SYS_SUPPORTS_ZBOOT
>> 203 select COMMON_CLK
>> 204
>> 205 config ATH25
>> 206 bool "Atheros AR231x/AR531x SoC support"
>> 207 select CEVT_R4K
>> 208 select CSRC_R4K
>> 209 select DMA_NONCOHERENT
>> 210 select IRQ_MIPS_CPU
>> 211 select IRQ_DOMAIN
>> 212 select SYS_HAS_CPU_MIPS32_R1
>> 213 select SYS_SUPPORTS_BIG_ENDIAN
>> 214 select SYS_SUPPORTS_32BIT_KERNEL
>> 215 select SYS_HAS_EARLY_PRINTK
>> 216 help
>> 217 Support for Atheros AR231x and Atheros AR531x based boards
>> 218
>> 219 config ATH79
>> 220 bool "Atheros AR71XX/AR724X/AR913X based boards"
>> 221 select ARCH_HAS_RESET_CONTROLLER
>> 222 select BOOT_RAW
>> 223 select CEVT_R4K
>> 224 select CSRC_R4K
>> 225 select DMA_NONCOHERENT
>> 226 select GPIOLIB
>> 227 select PINCTRL
>> 228 select COMMON_CLK
>> 229 select IRQ_MIPS_CPU
>> 230 select SYS_HAS_CPU_MIPS32_R2
>> 231 select SYS_HAS_EARLY_PRINTK
>> 232 select SYS_SUPPORTS_32BIT_KERNEL
>> 233 select SYS_SUPPORTS_BIG_ENDIAN
>> 234 select SYS_SUPPORTS_MIPS16
>> 235 select SYS_SUPPORTS_ZBOOT_UART_PROM
>> 236 select USE_OF
>> 237 select USB_EHCI_ROOT_HUB_TT if USB_EHCI_HCD_PLATFORM
>> 238 help
>> 239 Support for the Atheros AR71XX/AR724X/AR913X SoCs.
>> 240
>> 241 config BMIPS_GENERIC
>> 242 bool "Broadcom Generic BMIPS kernel"
>> 243 select ARCH_HAS_RESET_CONTROLLER
>> 244 select ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
>> 245 select BOOT_RAW
>> 246 select NO_EXCEPT_FILL
>> 247 select USE_OF
>> 248 select CEVT_R4K
>> 249 select CSRC_R4K
>> 250 select SYNC_R4K
>> 251 select COMMON_CLK
>> 252 select BCM6345_L1_IRQ
>> 253 select BCM7038_L1_IRQ
>> 254 select BCM7120_L2_IRQ
>> 255 select BRCMSTB_L2_IRQ
>> 256 select IRQ_MIPS_CPU
>> 257 select DMA_NONCOHERENT
>> 258 select SYS_SUPPORTS_32BIT_KERNEL
>> 259 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 260 select SYS_SUPPORTS_BIG_ENDIAN
>> 261 select SYS_SUPPORTS_HIGHMEM
>> 262 select SYS_HAS_CPU_BMIPS32_3300
>> 263 select SYS_HAS_CPU_BMIPS4350
>> 264 select SYS_HAS_CPU_BMIPS4380
>> 265 select SYS_HAS_CPU_BMIPS5000
>> 266 select SWAP_IO_SPACE
>> 267 select USB_EHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>> 268 select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 269 select USB_OHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>> 270 select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 271 select HARDIRQS_SW_RESEND
>> 272 select HAVE_PCI
>> 273 select PCI_DRIVERS_GENERIC
>> 274 select FW_CFE
>> 275 help
>> 276 Build a generic DT-based kernel image that boots on select
>> 277 BCM33xx cable modem chips, BCM63xx DSL chips, and BCM7xxx set-top
>> 278 box chips. Note that CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN
>> 279 must be set appropriately for your board.
>> 280
>> 281 config BCM47XX
>> 282 bool "Broadcom BCM47XX based boards"
>> 283 select BOOT_RAW
>> 284 select CEVT_R4K
>> 285 select CSRC_R4K
>> 286 select DMA_NONCOHERENT
>> 287 select HAVE_PCI
>> 288 select IRQ_MIPS_CPU
>> 289 select SYS_HAS_CPU_MIPS32_R1
>> 290 select NO_EXCEPT_FILL
>> 291 select SYS_SUPPORTS_32BIT_KERNEL
>> 292 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 293 select SYS_SUPPORTS_MIPS16
>> 294 select SYS_SUPPORTS_ZBOOT
>> 295 select SYS_HAS_EARLY_PRINTK
>> 296 select USE_GENERIC_EARLY_PRINTK_8250
>> 297 select GPIOLIB
>> 298 select LEDS_GPIO_REGISTER
>> 299 select BCM47XX_NVRAM
>> 300 select BCM47XX_SPROM
>> 301 select BCM47XX_SSB if !BCM47XX_BCMA
>> 302 help
>> 303 Support for BCM47XX based boards
>> 304
>> 305 config BCM63XX
>> 306 bool "Broadcom BCM63XX based boards"
>> 307 select BOOT_RAW
>> 308 select CEVT_R4K
>> 309 select CSRC_R4K
>> 310 select SYNC_R4K
>> 311 select DMA_NONCOHERENT
>> 312 select IRQ_MIPS_CPU
>> 313 select SYS_SUPPORTS_32BIT_KERNEL
>> 314 select SYS_SUPPORTS_BIG_ENDIAN
>> 315 select SYS_HAS_EARLY_PRINTK
>> 316 select SYS_HAS_CPU_BMIPS32_3300
>> 317 select SYS_HAS_CPU_BMIPS4350
>> 318 select SYS_HAS_CPU_BMIPS4380
>> 319 select SWAP_IO_SPACE
>> 320 select GPIOLIB
>> 321 select MIPS_L1_CACHE_SHIFT_4
>> 322 select HAVE_LEGACY_CLK
>> 323 help
>> 324 Support for BCM63XX based boards
>> 325
>> 326 config MIPS_COBALT
>> 327 bool "Cobalt Server"
>> 328 select CEVT_R4K
>> 329 select CSRC_R4K
>> 330 select CEVT_GT641XX
>> 331 select DMA_NONCOHERENT
>> 332 select FORCE_PCI
>> 333 select I8253
>> 334 select I8259
>> 335 select IRQ_MIPS_CPU
>> 336 select IRQ_GT641XX
>> 337 select PCI_GT64XXX_PCI0
>> 338 select SYS_HAS_CPU_NEVADA
>> 339 select SYS_HAS_EARLY_PRINTK
>> 340 select SYS_SUPPORTS_32BIT_KERNEL
>> 341 select SYS_SUPPORTS_64BIT_KERNEL
>> 342 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 343 select USE_GENERIC_EARLY_PRINTK_8250
>> 344
>> 345 config MACH_DECSTATION
>> 346 bool "DECstations"
>> 347 select BOOT_ELF32
>> 348 select CEVT_DS1287
>> 349 select CEVT_R4K if CPU_R4X00
>> 350 select CSRC_IOASIC
>> 351 select CSRC_R4K if CPU_R4X00
>> 352 select CPU_DADDI_WORKAROUNDS if 64BIT
>> 353 select CPU_R4000_WORKAROUNDS if 64BIT
>> 354 select CPU_R4400_WORKAROUNDS if 64BIT
>> 355 select DMA_NONCOHERENT
>> 356 select NO_IOPORT_MAP
>> 357 select IRQ_MIPS_CPU
>> 358 select SYS_HAS_CPU_R3000
>> 359 select SYS_HAS_CPU_R4X00
>> 360 select SYS_SUPPORTS_32BIT_KERNEL
>> 361 select SYS_SUPPORTS_64BIT_KERNEL
>> 362 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 363 select SYS_SUPPORTS_128HZ
>> 364 select SYS_SUPPORTS_256HZ
>> 365 select SYS_SUPPORTS_1024HZ
>> 366 select MIPS_L1_CACHE_SHIFT_4
>> 367 help
>> 368 This enables support for DEC's MIPS based workstations. For details
>> 369 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
>> 370 DECstation porting pages on <http://decstation.unix-ag.org/>.
>> 371
>> 372 If you have one of the following DECstation Models you definitely
>> 373 want to choose R4xx0 for the CPU Type:
>> 374
>> 375 DECstation 5000/50
>> 376 DECstation 5000/150
>> 377 DECstation 5000/260
>> 378 DECsystem 5900/260
>> 379
>> 380 otherwise choose R3000.
>> 381
>> 382 config MACH_JAZZ
>> 383 bool "Jazz family of machines"
>> 384 select ARC_MEMORY
>> 385 select ARC_PROMLIB
>> 386 select ARCH_MIGHT_HAVE_PC_PARPORT
>> 387 select ARCH_MIGHT_HAVE_PC_SERIO
>> 388 select DMA_OPS
>> 389 select FW_ARC
>> 390 select FW_ARC32
>> 391 select ARCH_MAY_HAVE_PC_FDC
>> 392 select CEVT_R4K
>> 393 select CSRC_R4K
>> 394 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
>> 395 select GENERIC_ISA_DMA
>> 396 select HAVE_PCSPKR_PLATFORM
>> 397 select IRQ_MIPS_CPU
>> 398 select I8253
>> 399 select I8259
>> 400 select ISA
>> 401 select SYS_HAS_CPU_R4X00
>> 402 select SYS_SUPPORTS_32BIT_KERNEL
>> 403 select SYS_SUPPORTS_64BIT_KERNEL
>> 404 select SYS_SUPPORTS_100HZ
>> 405 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 406 help
>> 407 This a family of machines based on the MIPS R4030 chipset which was
>> 408 used by several vendors to build RISC/os and Windows NT workstations.
>> 409 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and
>> 410 Olivetti M700-10 workstations.
>> 411
>> 412 config MACH_INGENIC_SOC
>> 413 bool "Ingenic SoC based machines"
>> 414 select MIPS_GENERIC
>> 415 select MACH_INGENIC
>> 416 select SYS_SUPPORTS_ZBOOT_UART16550
>> 417 select CPU_SUPPORTS_CPUFREQ
>> 418 select MIPS_EXTERNAL_TIMER
>> 419
>> 420 config LANTIQ
>> 421 bool "Lantiq based platforms"
>> 422 select DMA_NONCOHERENT
>> 423 select IRQ_MIPS_CPU
>> 424 select CEVT_R4K
>> 425 select CSRC_R4K
>> 426 select NO_EXCEPT_FILL
>> 427 select SYS_HAS_CPU_MIPS32_R1
>> 428 select SYS_HAS_CPU_MIPS32_R2
>> 429 select SYS_SUPPORTS_BIG_ENDIAN
>> 430 select SYS_SUPPORTS_32BIT_KERNEL
>> 431 select SYS_SUPPORTS_MIPS16
>> 432 select SYS_SUPPORTS_MULTITHREADING
>> 433 select SYS_SUPPORTS_VPE_LOADER
>> 434 select SYS_HAS_EARLY_PRINTK
>> 435 select GPIOLIB
>> 436 select SWAP_IO_SPACE
>> 437 select BOOT_RAW
>> 438 select HAVE_LEGACY_CLK
>> 439 select USE_OF
>> 440 select PINCTRL
>> 441 select PINCTRL_LANTIQ
>> 442 select ARCH_HAS_RESET_CONTROLLER
>> 443 select RESET_CONTROLLER
>> 444
>> 445 config MACH_LOONGSON32
>> 446 bool "Loongson 32-bit family of machines"
>> 447 select SYS_SUPPORTS_ZBOOT
>> 448 help
>> 449 This enables support for the Loongson-1 family of machines.
>> 450
>> 451 Loongson-1 is a family of 32-bit MIPS-compatible SoCs developed by
>> 452 the Institute of Computing Technology (ICT), Chinese Academy of
>> 453 Sciences (CAS).
>> 454
>> 455 config MACH_LOONGSON2EF
>> 456 bool "Loongson-2E/F family of machines"
>> 457 select SYS_SUPPORTS_ZBOOT
>> 458 help
>> 459 This enables the support of early Loongson-2E/F family of machines.
>> 460
>> 461 config MACH_LOONGSON64
>> 462 bool "Loongson 64-bit family of machines"
>> 463 select ARCH_DMA_DEFAULT_COHERENT
>> 464 select ARCH_SPARSEMEM_ENABLE
>> 465 select ARCH_MIGHT_HAVE_PC_PARPORT
>> 466 select ARCH_MIGHT_HAVE_PC_SERIO
>> 467 select GENERIC_ISA_DMA_SUPPORT_BROKEN
>> 468 select BOOT_ELF32
>> 469 select BOARD_SCACHE
>> 470 select CSRC_R4K
>> 471 select CEVT_R4K
>> 472 select FORCE_PCI
>> 473 select ISA
>> 474 select I8259
>> 475 select IRQ_MIPS_CPU
>> 476 select NO_EXCEPT_FILL
>> 477 select NR_CPUS_DEFAULT_64
>> 478 select USE_GENERIC_EARLY_PRINTK_8250
>> 479 select PCI_DRIVERS_GENERIC
>> 480 select SYS_HAS_CPU_LOONGSON64
>> 481 select SYS_HAS_EARLY_PRINTK
>> 482 select SYS_SUPPORTS_SMP
>> 483 select SYS_SUPPORTS_HOTPLUG_CPU
>> 484 select SYS_SUPPORTS_NUMA
>> 485 select SYS_SUPPORTS_64BIT_KERNEL
>> 486 select SYS_SUPPORTS_HIGHMEM
>> 487 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 488 select SYS_SUPPORTS_ZBOOT
>> 489 select SYS_SUPPORTS_RELOCATABLE
>> 490 select ZONE_DMA32
>> 491 select COMMON_CLK
>> 492 select USE_OF
>> 493 select BUILTIN_DTB
>> 494 select PCI_HOST_GENERIC
>> 495 select HAVE_ARCH_NODEDATA_EXTENSION if NUMA
>> 496 help
>> 497 This enables the support of Loongson-2/3 family of machines.
>> 498
>> 499 Loongson-2 and Loongson-3 are 64-bit general-purpose processors with
>> 500 GS264/GS464/GS464E/GS464V microarchitecture (except old Loongson-2E
>> 501 and Loongson-2F which will be removed), developed by the Institute
>> 502 of Computing Technology (ICT), Chinese Academy of Sciences (CAS).
>> 503
>> 504 config MIPS_MALTA
>> 505 bool "MIPS Malta board"
>> 506 select ARCH_MAY_HAVE_PC_FDC
>> 507 select ARCH_MIGHT_HAVE_PC_PARPORT
>> 508 select ARCH_MIGHT_HAVE_PC_SERIO
>> 509 select BOOT_ELF32
>> 510 select BOOT_RAW
>> 511 select BUILTIN_DTB
>> 512 select CEVT_R4K
>> 513 select CLKSRC_MIPS_GIC
>> 514 select COMMON_CLK
>> 515 select CSRC_R4K
>> 516 select DMA_NONCOHERENT
>> 517 select GENERIC_ISA_DMA
>> 518 select HAVE_PCSPKR_PLATFORM
>> 519 select HAVE_PCI
>> 520 select I8253
>> 521 select I8259
>> 522 select IRQ_MIPS_CPU
>> 523 select MIPS_BONITO64
>> 524 select MIPS_CPU_SCACHE
>> 525 select MIPS_GIC
>> 526 select MIPS_L1_CACHE_SHIFT_6
>> 527 select MIPS_MSC
>> 528 select PCI_GT64XXX_PCI0
>> 529 select SMP_UP if SMP
>> 530 select SWAP_IO_SPACE
>> 531 select SYS_HAS_CPU_MIPS32_R1
>> 532 select SYS_HAS_CPU_MIPS32_R2
>> 533 select SYS_HAS_CPU_MIPS32_R3_5
>> 534 select SYS_HAS_CPU_MIPS32_R5
>> 535 select SYS_HAS_CPU_MIPS32_R6
>> 536 select SYS_HAS_CPU_MIPS64_R1
>> 537 select SYS_HAS_CPU_MIPS64_R2
>> 538 select SYS_HAS_CPU_MIPS64_R6
>> 539 select SYS_HAS_CPU_NEVADA
>> 540 select SYS_HAS_CPU_RM7000
>> 541 select SYS_SUPPORTS_32BIT_KERNEL
>> 542 select SYS_SUPPORTS_64BIT_KERNEL
>> 543 select SYS_SUPPORTS_BIG_ENDIAN
>> 544 select SYS_SUPPORTS_HIGHMEM
>> 545 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 546 select SYS_SUPPORTS_MICROMIPS
>> 547 select SYS_SUPPORTS_MIPS16
>> 548 select SYS_SUPPORTS_MIPS_CPS
>> 549 select SYS_SUPPORTS_MULTITHREADING
>> 550 select SYS_SUPPORTS_RELOCATABLE
>> 551 select SYS_SUPPORTS_SMARTMIPS
>> 552 select SYS_SUPPORTS_VPE_LOADER
>> 553 select SYS_SUPPORTS_ZBOOT
>> 554 select USE_OF
>> 555 select WAR_ICACHE_REFILLS
210 select ZONE_DMA32 if 64BIT 556 select ZONE_DMA32 if 64BIT
>> 557 help
>> 558 This enables support for the MIPS Technologies Malta evaluation
>> 559 board.
211 560
212 config RUSTC_SUPPORTS_RISCV !! 561 config MACH_PIC32
213 def_bool y !! 562 bool "Microchip PIC32 Family"
214 depends on 64BIT !! 563 help
215 # Shadow call stack requires rustc ver !! 564 This enables support for the Microchip PIC32 family of platforms.
216 # -Zsanitizer=shadow-call-stack flag. <<
217 depends on !SHADOW_CALL_STACK || RUSTC <<
218 <<
219 config CLANG_SUPPORTS_DYNAMIC_FTRACE <<
220 def_bool CC_IS_CLANG <<
221 # https://github.com/ClangBuiltLinux/l <<
222 depends on AS_IS_GNU || (AS_IS_LLVM && <<
223 <<
224 config GCC_SUPPORTS_DYNAMIC_FTRACE <<
225 def_bool CC_IS_GCC <<
226 depends on $(cc-option,-fpatchable-fun <<
227 <<
228 config HAVE_SHADOW_CALL_STACK <<
229 def_bool $(cc-option,-fsanitize=shadow <<
230 # https://github.com/riscv-non-isa/ris <<
231 depends on $(ld-option,--no-relax-gp) <<
232 565
233 config RISCV_USE_LINKER_RELAXATION !! 566 Microchip PIC32 is a family of general-purpose 32 bit MIPS core
234 def_bool y !! 567 microcontrollers.
235 # https://github.com/llvm/llvm-project !! 568
236 depends on !LD_IS_LLD || LLD_VERSION > !! 569 config MACH_NINTENDO64
>> 570 bool "Nintendo 64 console"
>> 571 select CEVT_R4K
>> 572 select CSRC_R4K
>> 573 select SYS_HAS_CPU_R4300
>> 574 select SYS_SUPPORTS_BIG_ENDIAN
>> 575 select SYS_SUPPORTS_ZBOOT
>> 576 select SYS_SUPPORTS_32BIT_KERNEL
>> 577 select SYS_SUPPORTS_64BIT_KERNEL
>> 578 select DMA_NONCOHERENT
>> 579 select IRQ_MIPS_CPU
>> 580
>> 581 config RALINK
>> 582 bool "Ralink based machines"
>> 583 select CEVT_R4K
>> 584 select COMMON_CLK
>> 585 select CSRC_R4K
>> 586 select BOOT_RAW
>> 587 select DMA_NONCOHERENT
>> 588 select IRQ_MIPS_CPU
>> 589 select USE_OF
>> 590 select SYS_HAS_CPU_MIPS32_R2
>> 591 select SYS_SUPPORTS_32BIT_KERNEL
>> 592 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 593 select SYS_SUPPORTS_MIPS16
>> 594 select SYS_SUPPORTS_ZBOOT
>> 595 select SYS_HAS_EARLY_PRINTK
>> 596 select ARCH_HAS_RESET_CONTROLLER
>> 597 select RESET_CONTROLLER
>> 598
>> 599 config MACH_REALTEK_RTL
>> 600 bool "Realtek RTL838x/RTL839x based machines"
>> 601 select MIPS_GENERIC
>> 602 select DMA_NONCOHERENT
>> 603 select IRQ_MIPS_CPU
>> 604 select CSRC_R4K
>> 605 select CEVT_R4K
>> 606 select SYS_HAS_CPU_MIPS32_R1
>> 607 select SYS_HAS_CPU_MIPS32_R2
>> 608 select SYS_SUPPORTS_BIG_ENDIAN
>> 609 select SYS_SUPPORTS_32BIT_KERNEL
>> 610 select SYS_SUPPORTS_MIPS16
>> 611 select SYS_SUPPORTS_MULTITHREADING
>> 612 select SYS_SUPPORTS_VPE_LOADER
>> 613 select BOOT_RAW
>> 614 select PINCTRL
>> 615 select USE_OF
>> 616
>> 617 config SGI_IP22
>> 618 bool "SGI IP22 (Indy/Indigo2)"
>> 619 select ARC_MEMORY
>> 620 select ARC_PROMLIB
>> 621 select FW_ARC
>> 622 select FW_ARC32
>> 623 select ARCH_MIGHT_HAVE_PC_SERIO
>> 624 select BOOT_ELF32
>> 625 select CEVT_R4K
>> 626 select CSRC_R4K
>> 627 select DEFAULT_SGI_PARTITION
>> 628 select DMA_NONCOHERENT
>> 629 select HAVE_EISA
>> 630 select I8253
>> 631 select I8259
>> 632 select IP22_CPU_SCACHE
>> 633 select IRQ_MIPS_CPU
>> 634 select GENERIC_ISA_DMA_SUPPORT_BROKEN
>> 635 select SGI_HAS_I8042
>> 636 select SGI_HAS_INDYDOG
>> 637 select SGI_HAS_HAL2
>> 638 select SGI_HAS_SEEQ
>> 639 select SGI_HAS_WD93
>> 640 select SGI_HAS_ZILOG
>> 641 select SWAP_IO_SPACE
>> 642 select SYS_HAS_CPU_R4X00
>> 643 select SYS_HAS_CPU_R5000
>> 644 select SYS_HAS_EARLY_PRINTK
>> 645 select SYS_SUPPORTS_32BIT_KERNEL
>> 646 select SYS_SUPPORTS_64BIT_KERNEL
>> 647 select SYS_SUPPORTS_BIG_ENDIAN
>> 648 select WAR_R4600_V1_INDEX_ICACHEOP
>> 649 select WAR_R4600_V1_HIT_CACHEOP
>> 650 select WAR_R4600_V2_HIT_CACHEOP
>> 651 select MIPS_L1_CACHE_SHIFT_7
>> 652 help
>> 653 This are the SGI Indy, Challenge S and Indigo2, as well as certain
>> 654 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
>> 655 that runs on these, say Y here.
>> 656
>> 657 config SGI_IP27
>> 658 bool "SGI IP27 (Origin200/2000)"
>> 659 select ARCH_HAS_PHYS_TO_DMA
>> 660 select ARCH_SPARSEMEM_ENABLE
>> 661 select FW_ARC
>> 662 select FW_ARC64
>> 663 select ARC_CMDLINE_ONLY
>> 664 select BOOT_ELF64
>> 665 select DEFAULT_SGI_PARTITION
>> 666 select FORCE_PCI
>> 667 select SYS_HAS_EARLY_PRINTK
>> 668 select HAVE_PCI
>> 669 select IRQ_MIPS_CPU
>> 670 select IRQ_DOMAIN_HIERARCHY
>> 671 select NR_CPUS_DEFAULT_64
>> 672 select PCI_DRIVERS_GENERIC
>> 673 select PCI_XTALK_BRIDGE
>> 674 select SYS_HAS_CPU_R10000
>> 675 select SYS_SUPPORTS_64BIT_KERNEL
>> 676 select SYS_SUPPORTS_BIG_ENDIAN
>> 677 select SYS_SUPPORTS_NUMA
>> 678 select SYS_SUPPORTS_SMP
>> 679 select WAR_R10000_LLSC
>> 680 select MIPS_L1_CACHE_SHIFT_7
>> 681 select NUMA
>> 682 select HAVE_ARCH_NODEDATA_EXTENSION
>> 683 help
>> 684 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
>> 685 workstations. To compile a Linux kernel that runs on these, say Y
>> 686 here.
237 687
238 # https://github.com/llvm/llvm-project/commit/ !! 688 config SGI_IP28
239 config ARCH_HAS_BROKEN_DWARF5 !! 689 bool "SGI IP28 (Indigo2 R10k)"
240 def_bool y !! 690 select ARC_MEMORY
241 depends on RISCV_USE_LINKER_RELAXATION !! 691 select ARC_PROMLIB
242 # https://github.com/llvm/llvm-project !! 692 select FW_ARC
243 depends on AS_IS_LLVM && AS_VERSION < !! 693 select FW_ARC64
244 # https://github.com/llvm/llvm-project !! 694 select ARCH_MIGHT_HAVE_PC_SERIO
245 depends on LD_IS_LLD && LLD_VERSION < !! 695 select BOOT_ELF64
>> 696 select CEVT_R4K
>> 697 select CSRC_R4K
>> 698 select DEFAULT_SGI_PARTITION
>> 699 select DMA_NONCOHERENT
>> 700 select GENERIC_ISA_DMA_SUPPORT_BROKEN
>> 701 select IRQ_MIPS_CPU
>> 702 select HAVE_EISA
>> 703 select I8253
>> 704 select I8259
>> 705 select SGI_HAS_I8042
>> 706 select SGI_HAS_INDYDOG
>> 707 select SGI_HAS_HAL2
>> 708 select SGI_HAS_SEEQ
>> 709 select SGI_HAS_WD93
>> 710 select SGI_HAS_ZILOG
>> 711 select SWAP_IO_SPACE
>> 712 select SYS_HAS_CPU_R10000
>> 713 select SYS_HAS_EARLY_PRINTK
>> 714 select SYS_SUPPORTS_64BIT_KERNEL
>> 715 select SYS_SUPPORTS_BIG_ENDIAN
>> 716 select WAR_R10000_LLSC
>> 717 select MIPS_L1_CACHE_SHIFT_7
>> 718 help
>> 719 This is the SGI Indigo2 with R10000 processor. To compile a Linux
>> 720 kernel that runs on these, say Y here.
>> 721
>> 722 config SGI_IP30
>> 723 bool "SGI IP30 (Octane/Octane2)"
>> 724 select ARCH_HAS_PHYS_TO_DMA
>> 725 select FW_ARC
>> 726 select FW_ARC64
>> 727 select BOOT_ELF64
>> 728 select CEVT_R4K
>> 729 select CSRC_R4K
>> 730 select FORCE_PCI
>> 731 select SYNC_R4K if SMP
>> 732 select ZONE_DMA32
>> 733 select HAVE_PCI
>> 734 select IRQ_MIPS_CPU
>> 735 select IRQ_DOMAIN_HIERARCHY
>> 736 select PCI_DRIVERS_GENERIC
>> 737 select PCI_XTALK_BRIDGE
>> 738 select SYS_HAS_EARLY_PRINTK
>> 739 select SYS_HAS_CPU_R10000
>> 740 select SYS_SUPPORTS_64BIT_KERNEL
>> 741 select SYS_SUPPORTS_BIG_ENDIAN
>> 742 select SYS_SUPPORTS_SMP
>> 743 select WAR_R10000_LLSC
>> 744 select MIPS_L1_CACHE_SHIFT_7
>> 745 select ARC_MEMORY
>> 746 help
>> 747 These are the SGI Octane and Octane2 graphics workstations. To
>> 748 compile a Linux kernel that runs on these, say Y here.
>> 749
>> 750 config SGI_IP32
>> 751 bool "SGI IP32 (O2)"
>> 752 select ARC_MEMORY
>> 753 select ARC_PROMLIB
>> 754 select ARCH_HAS_PHYS_TO_DMA
>> 755 select FW_ARC
>> 756 select FW_ARC32
>> 757 select BOOT_ELF32
>> 758 select CEVT_R4K
>> 759 select CSRC_R4K
>> 760 select DMA_NONCOHERENT
>> 761 select HAVE_PCI
>> 762 select IRQ_MIPS_CPU
>> 763 select R5000_CPU_SCACHE
>> 764 select RM7000_CPU_SCACHE
>> 765 select SYS_HAS_CPU_R5000
>> 766 select SYS_HAS_CPU_R10000 if BROKEN
>> 767 select SYS_HAS_CPU_RM7000
>> 768 select SYS_HAS_CPU_NEVADA
>> 769 select SYS_SUPPORTS_64BIT_KERNEL
>> 770 select SYS_SUPPORTS_BIG_ENDIAN
>> 771 select WAR_ICACHE_REFILLS
>> 772 help
>> 773 If you want this kernel to run on SGI O2 workstation, say Y here.
>> 774
>> 775 config SIBYTE_CRHONE
>> 776 bool "Sibyte BCM91125C-CRhone"
>> 777 select BOOT_ELF32
>> 778 select SIBYTE_BCM1125
>> 779 select SWAP_IO_SPACE
>> 780 select SYS_HAS_CPU_SB1
>> 781 select SYS_SUPPORTS_BIG_ENDIAN
>> 782 select SYS_SUPPORTS_HIGHMEM
>> 783 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 784
>> 785 config SIBYTE_RHONE
>> 786 bool "Sibyte BCM91125E-Rhone"
>> 787 select BOOT_ELF32
>> 788 select SIBYTE_SB1250
>> 789 select SWAP_IO_SPACE
>> 790 select SYS_HAS_CPU_SB1
>> 791 select SYS_SUPPORTS_BIG_ENDIAN
>> 792 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 793
>> 794 config SIBYTE_SWARM
>> 795 bool "Sibyte BCM91250A-SWARM"
>> 796 select BOOT_ELF32
>> 797 select HAVE_PATA_PLATFORM
>> 798 select SIBYTE_SB1250
>> 799 select SWAP_IO_SPACE
>> 800 select SYS_HAS_CPU_SB1
>> 801 select SYS_SUPPORTS_BIG_ENDIAN
>> 802 select SYS_SUPPORTS_HIGHMEM
>> 803 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 804 select ZONE_DMA32 if 64BIT
>> 805 select SWIOTLB if ARCH_DMA_ADDR_T_64BIT && PCI
246 806
247 config ARCH_MMAP_RND_BITS_MIN !! 807 config SIBYTE_LITTLESUR
248 default 18 if 64BIT !! 808 bool "Sibyte BCM91250C2-LittleSur"
249 default 8 !! 809 select BOOT_ELF32
>> 810 select HAVE_PATA_PLATFORM
>> 811 select SIBYTE_SB1250
>> 812 select SWAP_IO_SPACE
>> 813 select SYS_HAS_CPU_SB1
>> 814 select SYS_SUPPORTS_BIG_ENDIAN
>> 815 select SYS_SUPPORTS_HIGHMEM
>> 816 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 817 select ZONE_DMA32 if 64BIT
250 818
251 config ARCH_MMAP_RND_COMPAT_BITS_MIN !! 819 config SIBYTE_SENTOSA
252 default 8 !! 820 bool "Sibyte BCM91250E-Sentosa"
>> 821 select BOOT_ELF32
>> 822 select SIBYTE_SB1250
>> 823 select SWAP_IO_SPACE
>> 824 select SYS_HAS_CPU_SB1
>> 825 select SYS_SUPPORTS_BIG_ENDIAN
>> 826 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 827 select SWIOTLB if ARCH_DMA_ADDR_T_64BIT && PCI
>> 828
>> 829 config SIBYTE_BIGSUR
>> 830 bool "Sibyte BCM91480B-BigSur"
>> 831 select BOOT_ELF32
>> 832 select NR_CPUS_DEFAULT_4
>> 833 select SIBYTE_BCM1x80
>> 834 select SWAP_IO_SPACE
>> 835 select SYS_HAS_CPU_SB1
>> 836 select SYS_SUPPORTS_BIG_ENDIAN
>> 837 select SYS_SUPPORTS_HIGHMEM
>> 838 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 839 select ZONE_DMA32 if 64BIT
>> 840 select SWIOTLB if ARCH_DMA_ADDR_T_64BIT && PCI
253 841
254 # max bits determined by the following formula !! 842 config SNI_RM
255 # VA_BITS - PAGE_SHIFT - 3 !! 843 bool "SNI RM200/300/400"
256 config ARCH_MMAP_RND_BITS_MAX !! 844 select ARC_MEMORY
257 default 24 if 64BIT # SV39 based !! 845 select ARC_PROMLIB
258 default 17 !! 846 select FW_ARC if CPU_LITTLE_ENDIAN
>> 847 select FW_ARC32 if CPU_LITTLE_ENDIAN
>> 848 select FW_SNIPROM if CPU_BIG_ENDIAN
>> 849 select ARCH_MAY_HAVE_PC_FDC
>> 850 select ARCH_MIGHT_HAVE_PC_PARPORT
>> 851 select ARCH_MIGHT_HAVE_PC_SERIO
>> 852 select BOOT_ELF32
>> 853 select CEVT_R4K
>> 854 select CSRC_R4K
>> 855 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
>> 856 select DMA_NONCOHERENT
>> 857 select GENERIC_ISA_DMA
>> 858 select HAVE_EISA
>> 859 select HAVE_PCSPKR_PLATFORM
>> 860 select HAVE_PCI
>> 861 select IRQ_MIPS_CPU
>> 862 select I8253
>> 863 select I8259
>> 864 select ISA
>> 865 select MIPS_L1_CACHE_SHIFT_6
>> 866 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
>> 867 select SYS_HAS_CPU_R4X00
>> 868 select SYS_HAS_CPU_R5000
>> 869 select SYS_HAS_CPU_R10000
>> 870 select R5000_CPU_SCACHE
>> 871 select SYS_HAS_EARLY_PRINTK
>> 872 select SYS_SUPPORTS_32BIT_KERNEL
>> 873 select SYS_SUPPORTS_64BIT_KERNEL
>> 874 select SYS_SUPPORTS_BIG_ENDIAN
>> 875 select SYS_SUPPORTS_HIGHMEM
>> 876 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 877 select WAR_R4600_V2_HIT_CACHEOP
>> 878 help
>> 879 The SNI RM200/300/400 are MIPS-based machines manufactured by
>> 880 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
>> 881 Technology and now in turn merged with Fujitsu. Say Y here to
>> 882 support this machine type.
>> 883
>> 884 config MACH_TX49XX
>> 885 bool "Toshiba TX49 series based machines"
>> 886 select WAR_TX49XX_ICACHE_INDEX_INV
>> 887
>> 888 config MIKROTIK_RB532
>> 889 bool "Mikrotik RB532 boards"
>> 890 select CEVT_R4K
>> 891 select CSRC_R4K
>> 892 select DMA_NONCOHERENT
>> 893 select HAVE_PCI
>> 894 select IRQ_MIPS_CPU
>> 895 select SYS_HAS_CPU_MIPS32_R1
>> 896 select SYS_SUPPORTS_32BIT_KERNEL
>> 897 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 898 select SWAP_IO_SPACE
>> 899 select BOOT_RAW
>> 900 select GPIOLIB
>> 901 select MIPS_L1_CACHE_SHIFT_4
>> 902 help
>> 903 Support the Mikrotik(tm) RouterBoard 532 series,
>> 904 based on the IDT RC32434 SoC.
>> 905
>> 906 config CAVIUM_OCTEON_SOC
>> 907 bool "Cavium Networks Octeon SoC based boards"
>> 908 select CEVT_R4K
>> 909 select ARCH_HAS_PHYS_TO_DMA
>> 910 select HAVE_RAPIDIO
>> 911 select PHYS_ADDR_T_64BIT
>> 912 select SYS_SUPPORTS_64BIT_KERNEL
>> 913 select SYS_SUPPORTS_BIG_ENDIAN
>> 914 select EDAC_SUPPORT
>> 915 select EDAC_ATOMIC_SCRUB
>> 916 select SYS_SUPPORTS_LITTLE_ENDIAN
>> 917 select SYS_SUPPORTS_HOTPLUG_CPU if CPU_BIG_ENDIAN
>> 918 select SYS_HAS_EARLY_PRINTK
>> 919 select SYS_HAS_CPU_CAVIUM_OCTEON
>> 920 select HAVE_PCI
>> 921 select HAVE_PLAT_DELAY
>> 922 select HAVE_PLAT_FW_INIT_CMDLINE
>> 923 select HAVE_PLAT_MEMCPY
>> 924 select ZONE_DMA32
>> 925 select GPIOLIB
>> 926 select USE_OF
>> 927 select ARCH_SPARSEMEM_ENABLE
>> 928 select SYS_SUPPORTS_SMP
>> 929 select NR_CPUS_DEFAULT_64
>> 930 select MIPS_NR_CPU_NR_MAP_1024
>> 931 select BUILTIN_DTB
>> 932 select MTD
>> 933 select MTD_COMPLEX_MAPPINGS
>> 934 select SWIOTLB
>> 935 select SYS_SUPPORTS_RELOCATABLE
>> 936 help
>> 937 This option supports all of the Octeon reference boards from Cavium
>> 938 Networks. It builds a kernel that dynamically determines the Octeon
>> 939 CPU type and supports all known board reference implementations.
>> 940 Some of the supported boards are:
>> 941 EBT3000
>> 942 EBH3000
>> 943 EBH3100
>> 944 Thunder
>> 945 Kodama
>> 946 Hikari
>> 947 Say Y here for most Octeon reference boards.
259 948
260 config ARCH_MMAP_RND_COMPAT_BITS_MAX !! 949 endchoice
261 default 17 !! 950
>> 951 source "arch/mips/alchemy/Kconfig"
>> 952 source "arch/mips/ath25/Kconfig"
>> 953 source "arch/mips/ath79/Kconfig"
>> 954 source "arch/mips/bcm47xx/Kconfig"
>> 955 source "arch/mips/bcm63xx/Kconfig"
>> 956 source "arch/mips/bmips/Kconfig"
>> 957 source "arch/mips/generic/Kconfig"
>> 958 source "arch/mips/ingenic/Kconfig"
>> 959 source "arch/mips/jazz/Kconfig"
>> 960 source "arch/mips/lantiq/Kconfig"
>> 961 source "arch/mips/pic32/Kconfig"
>> 962 source "arch/mips/ralink/Kconfig"
>> 963 source "arch/mips/sgi-ip27/Kconfig"
>> 964 source "arch/mips/sibyte/Kconfig"
>> 965 source "arch/mips/txx9/Kconfig"
>> 966 source "arch/mips/cavium-octeon/Kconfig"
>> 967 source "arch/mips/loongson2ef/Kconfig"
>> 968 source "arch/mips/loongson32/Kconfig"
>> 969 source "arch/mips/loongson64/Kconfig"
262 970
263 # set if we run in machine mode, cleared if we !! 971 endmenu
264 config RISCV_M_MODE !! 972
265 bool "Build a kernel that runs in mach !! 973 config GENERIC_HWEIGHT
266 depends on !MMU !! 974 bool
267 default y 975 default y
268 help <<
269 Select this option if you want to ru <<
270 without the assistance of any other <<
271 976
272 # set if we are running in S-mode and can use !! 977 config GENERIC_CALIBRATE_DELAY
273 config RISCV_SBI <<
274 bool 978 bool
275 depends on !RISCV_M_MODE <<
276 default y 979 default y
277 980
278 config MMU !! 981 config SCHED_OMIT_FRAME_POINTER
279 bool "MMU-based Paged Memory Managemen !! 982 bool
280 default y 983 default y
281 help <<
282 Select if you want MMU-based virtual <<
283 support by paged memory management. <<
284 984
285 config PAGE_OFFSET !! 985 #
286 hex !! 986 # Select some configuration options automatically based on user selections.
287 default 0x80000000 if !MMU && RISCV_M_ !! 987 #
288 default 0x80200000 if !MMU !! 988 config FW_ARC
289 default 0xc0000000 if 32BIT !! 989 bool
290 default 0xff60000000000000 if 64BIT <<
291 <<
292 config KASAN_SHADOW_OFFSET <<
293 hex <<
294 depends on KASAN_GENERIC <<
295 default 0xdfffffff00000000 if 64BIT <<
296 default 0xffffffff if 32BIT <<
297 990
298 config ARCH_FLATMEM_ENABLE !! 991 config ARCH_MAY_HAVE_PC_FDC
299 def_bool !NUMA !! 992 bool
300 993
301 config ARCH_SPARSEMEM_ENABLE !! 994 config BOOT_RAW
302 def_bool y !! 995 bool
303 depends on MMU <<
304 select SPARSEMEM_STATIC if 32BIT && SP <<
305 select SPARSEMEM_VMEMMAP_ENABLE if 64B <<
306 996
307 config ARCH_SELECT_MEMORY_MODEL !! 997 config CEVT_BCM1480
308 def_bool ARCH_SPARSEMEM_ENABLE !! 998 bool
309 999
310 config ARCH_SUPPORTS_UPROBES !! 1000 config CEVT_DS1287
311 def_bool y !! 1001 bool
312 1002
313 config STACKTRACE_SUPPORT !! 1003 config CEVT_GT641XX
314 def_bool y !! 1004 bool
315 1005
316 config GENERIC_BUG !! 1006 config CEVT_R4K
317 def_bool y !! 1007 bool
318 depends on BUG <<
319 select GENERIC_BUG_RELATIVE_POINTERS i <<
320 1008
321 config GENERIC_BUG_RELATIVE_POINTERS !! 1009 config CEVT_SB1250
322 bool 1010 bool
323 1011
324 config GENERIC_CALIBRATE_DELAY !! 1012 config CEVT_TXX9
325 def_bool y !! 1013 bool
326 1014
327 config GENERIC_CSUM !! 1015 config CSRC_BCM1480
328 def_bool y !! 1016 bool
329 1017
330 config GENERIC_HWEIGHT !! 1018 config CSRC_IOASIC
331 def_bool y !! 1019 bool
>> 1020
>> 1021 config CSRC_R4K
>> 1022 select CLOCKSOURCE_WATCHDOG if CPU_FREQ
>> 1023 bool
332 1024
333 config FIX_EARLYCON_MEM !! 1025 config CSRC_SB1250
334 def_bool MMU !! 1026 bool
335 1027
336 config ILLEGAL_POINTER_VALUE !! 1028 config MIPS_CLOCK_VSYSCALL
337 hex !! 1029 def_bool CSRC_R4K || CLKSRC_MIPS_GIC
338 default 0 if 32BIT <<
339 default 0xdead000000000000 if 64BIT <<
340 1030
341 config PGTABLE_LEVELS !! 1031 config GPIO_TXX9
342 int !! 1032 select GPIOLIB
343 default 5 if 64BIT !! 1033 bool
344 default 2 <<
345 1034
346 config LOCKDEP_SUPPORT !! 1035 config FW_CFE
>> 1036 bool
>> 1037
>> 1038 config ARCH_SUPPORTS_UPROBES
347 def_bool y 1039 def_bool y
348 1040
349 config RISCV_DMA_NONCOHERENT !! 1041 config DMA_NONCOHERENT
350 bool 1042 bool
351 select ARCH_HAS_DMA_PREP_COHERENT !! 1043 #
>> 1044 # MIPS allows mixing "slightly different" Cacheability and Coherency
>> 1045 # Attribute bits. It is believed that the uncached access through
>> 1046 # KSEG1 and the implementation specific "uncached accelerated" used
>> 1047 # by pgprot_writcombine can be mixed, and the latter sometimes provides
>> 1048 # significant advantages.
>> 1049 #
352 select ARCH_HAS_SETUP_DMA_OPS 1050 select ARCH_HAS_SETUP_DMA_OPS
>> 1051 select ARCH_HAS_DMA_WRITE_COMBINE
>> 1052 select ARCH_HAS_DMA_PREP_COHERENT
353 select ARCH_HAS_SYNC_DMA_FOR_CPU 1053 select ARCH_HAS_SYNC_DMA_FOR_CPU
354 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 1054 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
355 select DMA_BOUNCE_UNALIGNED_KMALLOC if !! 1055 select ARCH_HAS_DMA_SET_UNCACHED
>> 1056 select DMA_NONCOHERENT_MMAP
>> 1057 select NEED_DMA_MAP_STATE
356 1058
357 config RISCV_NONSTANDARD_CACHE_OPS !! 1059 config SYS_HAS_EARLY_PRINTK
358 bool 1060 bool
359 help <<
360 This enables function pointer suppor <<
361 systems to handle cache management. <<
362 1061
363 config AS_HAS_INSN !! 1062 config SYS_SUPPORTS_HOTPLUG_CPU
364 def_bool $(as-instr,.insn r 51$(comma) !! 1063 bool
365 1064
366 config AS_HAS_OPTION_ARCH !! 1065 config MIPS_BONITO64
367 # https://github.com/llvm/llvm-project !! 1066 bool
368 def_bool y <<
369 depends on $(as-instr, .option arch$(c <<
370 1067
371 source "arch/riscv/Kconfig.socs" !! 1068 config MIPS_MSC
372 source "arch/riscv/Kconfig.errata" !! 1069 bool
373 1070
374 menu "Platform type" !! 1071 config SYNC_R4K
>> 1072 bool
375 1073
376 config NONPORTABLE !! 1074 config NO_IOPORT_MAP
377 bool "Allow configurations that result !! 1075 def_bool n
378 help <<
379 RISC-V kernel binaries are compatibl <<
380 whenever possible, but there are som <<
381 satisfied by configurations that res <<
382 not portable between systems. <<
383 1076
384 Selecting N does not guarantee kerne !! 1077 config GENERIC_CSUM
385 systems. Selecting any of the optio !! 1078 def_bool CPU_NO_LOAD_STORE_LR
386 result in kernel binaries that are u <<
387 systems. <<
388 1079
389 If unsure, say N. !! 1080 config GENERIC_ISA_DMA
>> 1081 bool
>> 1082 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
>> 1083 select ISA_DMA_API
>> 1084
>> 1085 config GENERIC_ISA_DMA_SUPPORT_BROKEN
>> 1086 bool
>> 1087 select GENERIC_ISA_DMA
>> 1088
>> 1089 config HAVE_PLAT_DELAY
>> 1090 bool
>> 1091
>> 1092 config HAVE_PLAT_FW_INIT_CMDLINE
>> 1093 bool
>> 1094
>> 1095 config HAVE_PLAT_MEMCPY
>> 1096 bool
>> 1097
>> 1098 config ISA_DMA_API
>> 1099 bool
390 1100
>> 1101 config SYS_SUPPORTS_RELOCATABLE
>> 1102 bool
>> 1103 help
>> 1104 Selected if the platform supports relocating the kernel.
>> 1105 The platform must provide plat_get_fdt() if it selects CONFIG_USE_OF
>> 1106 to allow access to command line and entropy sources.
>> 1107
>> 1108 #
>> 1109 # Endianness selection. Sufficiently obscure so many users don't know what to
>> 1110 # answer,so we try hard to limit the available choices. Also the use of a
>> 1111 # choice statement should be more obvious to the user.
>> 1112 #
391 choice 1113 choice
392 prompt "Base ISA" !! 1114 prompt "Endianness selection"
393 default ARCH_RV64I <<
394 help 1115 help
395 This selects the base ISA that this !! 1116 Some MIPS machines can be configured for either little or big endian
396 the target platform. !! 1117 byte order. These modes require different kernels and a different
>> 1118 Linux distribution. In general there is one preferred byteorder for a
>> 1119 particular system but some systems are just as commonly used in the
>> 1120 one or the other endianness.
>> 1121
>> 1122 config CPU_BIG_ENDIAN
>> 1123 bool "Big endian"
>> 1124 depends on SYS_SUPPORTS_BIG_ENDIAN
>> 1125
>> 1126 config CPU_LITTLE_ENDIAN
>> 1127 bool "Little endian"
>> 1128 depends on SYS_SUPPORTS_LITTLE_ENDIAN
397 1129
398 config ARCH_RV32I !! 1130 endchoice
399 bool "RV32I" !! 1131
400 depends on NONPORTABLE !! 1132 config EXPORT_UASM
401 select 32BIT !! 1133 bool
402 select GENERIC_LIB_ASHLDI3 <<
403 select GENERIC_LIB_ASHRDI3 <<
404 select GENERIC_LIB_LSHRDI3 <<
405 select GENERIC_LIB_UCMPDI2 <<
406 1134
407 config ARCH_RV64I !! 1135 config SYS_SUPPORTS_APM_EMULATION
408 bool "RV64I" !! 1136 bool
409 select 64BIT <<
410 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
411 select SWIOTLB if MMU <<
412 1137
413 endchoice !! 1138 config SYS_SUPPORTS_BIG_ENDIAN
>> 1139 bool
>> 1140
>> 1141 config SYS_SUPPORTS_LITTLE_ENDIAN
>> 1142 bool
>> 1143
>> 1144 config MIPS_HUGE_TLB_SUPPORT
>> 1145 def_bool HUGETLB_PAGE || TRANSPARENT_HUGEPAGE
>> 1146
>> 1147 config IRQ_TXX9
>> 1148 bool
>> 1149
>> 1150 config IRQ_GT641XX
>> 1151 bool
>> 1152
>> 1153 config PCI_GT64XXX_PCI0
>> 1154 bool
>> 1155
>> 1156 config PCI_XTALK_BRIDGE
>> 1157 bool
>> 1158
>> 1159 config NO_EXCEPT_FILL
>> 1160 bool
>> 1161
>> 1162 config MIPS_SPRAM
>> 1163 bool
>> 1164
>> 1165 config SWAP_IO_SPACE
>> 1166 bool
>> 1167
>> 1168 config SGI_HAS_INDYDOG
>> 1169 bool
>> 1170
>> 1171 config SGI_HAS_HAL2
>> 1172 bool
>> 1173
>> 1174 config SGI_HAS_SEEQ
>> 1175 bool
>> 1176
>> 1177 config SGI_HAS_WD93
>> 1178 bool
>> 1179
>> 1180 config SGI_HAS_ZILOG
>> 1181 bool
>> 1182
>> 1183 config SGI_HAS_I8042
>> 1184 bool
>> 1185
>> 1186 config DEFAULT_SGI_PARTITION
>> 1187 bool
>> 1188
>> 1189 config FW_ARC32
>> 1190 bool
>> 1191
>> 1192 config FW_SNIPROM
>> 1193 bool
>> 1194
>> 1195 config BOOT_ELF32
>> 1196 bool
>> 1197
>> 1198 config MIPS_L1_CACHE_SHIFT_4
>> 1199 bool
>> 1200
>> 1201 config MIPS_L1_CACHE_SHIFT_5
>> 1202 bool
>> 1203
>> 1204 config MIPS_L1_CACHE_SHIFT_6
>> 1205 bool
>> 1206
>> 1207 config MIPS_L1_CACHE_SHIFT_7
>> 1208 bool
>> 1209
>> 1210 config MIPS_L1_CACHE_SHIFT
>> 1211 int
>> 1212 default "7" if MIPS_L1_CACHE_SHIFT_7
>> 1213 default "6" if MIPS_L1_CACHE_SHIFT_6
>> 1214 default "5" if MIPS_L1_CACHE_SHIFT_5
>> 1215 default "4" if MIPS_L1_CACHE_SHIFT_4
>> 1216 default "5"
>> 1217
>> 1218 config ARC_CMDLINE_ONLY
>> 1219 bool
>> 1220
>> 1221 config ARC_CONSOLE
>> 1222 bool "ARC console support"
>> 1223 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
>> 1224
>> 1225 config ARC_MEMORY
>> 1226 bool
>> 1227
>> 1228 config ARC_PROMLIB
>> 1229 bool
>> 1230
>> 1231 config FW_ARC64
>> 1232 bool
>> 1233
>> 1234 config BOOT_ELF64
>> 1235 bool
>> 1236
>> 1237 menu "CPU selection"
414 1238
415 # We must be able to map all physical memory i <<
416 # is still a bit more efficient when generatin <<
417 # such that it can only map 2GiB of memory. <<
418 choice 1239 choice
419 prompt "Kernel Code Model" !! 1240 prompt "CPU type"
420 default CMODEL_MEDLOW if 32BIT !! 1241 default CPU_R4X00
421 default CMODEL_MEDANY if 64BIT !! 1242
422 !! 1243 config CPU_LOONGSON64
423 config CMODEL_MEDLOW !! 1244 bool "Loongson 64-bit CPU"
424 bool "medium low code model" !! 1245 depends on SYS_HAS_CPU_LOONGSON64
425 config CMODEL_MEDANY !! 1246 select ARCH_HAS_PHYS_TO_DMA
426 bool "medium any code model" !! 1247 select CPU_MIPSR2
>> 1248 select CPU_HAS_PREFETCH
>> 1249 select CPU_SUPPORTS_64BIT_KERNEL
>> 1250 select CPU_SUPPORTS_HIGHMEM
>> 1251 select CPU_SUPPORTS_HUGEPAGES
>> 1252 select CPU_SUPPORTS_MSA
>> 1253 select CPU_DIEI_BROKEN if !LOONGSON3_ENHANCEMENT
>> 1254 select CPU_MIPSR2_IRQ_VI
>> 1255 select DMA_NONCOHERENT
>> 1256 select WEAK_ORDERING
>> 1257 select WEAK_REORDERING_BEYOND_LLSC
>> 1258 select MIPS_ASID_BITS_VARIABLE
>> 1259 select MIPS_PGD_C0_CONTEXT
>> 1260 select MIPS_L1_CACHE_SHIFT_6
>> 1261 select MIPS_FP_SUPPORT
>> 1262 select GPIOLIB
>> 1263 select SWIOTLB
>> 1264 select HAVE_KVM
>> 1265 help
>> 1266 The Loongson GSx64(GS264/GS464/GS464E/GS464V) series of processor
>> 1267 cores implements the MIPS64R2 instruction set with many extensions,
>> 1268 including most 64-bit Loongson-2 (2H, 2K) and Loongson-3 (3A1000,
>> 1269 3B1000, 3B1500, 3A2000, 3A3000 and 3A4000) processors. However, old
>> 1270 Loongson-2E/2F is not covered here and will be removed in future.
>> 1271
>> 1272 config LOONGSON3_ENHANCEMENT
>> 1273 bool "New Loongson-3 CPU Enhancements"
>> 1274 default n
>> 1275 depends on CPU_LOONGSON64
>> 1276 help
>> 1277 New Loongson-3 cores (since Loongson-3A R2, as opposed to Loongson-3A
>> 1278 R1, Loongson-3B R1 and Loongson-3B R2) has many enhancements, such as
>> 1279 FTLB, L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPr2 ASE, User
>> 1280 Local register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer),
>> 1281 Fast TLB refill support, etc.
>> 1282
>> 1283 This option enable those enhancements which are not probed at run
>> 1284 time. If you want a generic kernel to run on all Loongson 3 machines,
>> 1285 please say 'N' here. If you want a high-performance kernel to run on
>> 1286 new Loongson-3 machines only, please say 'Y' here.
>> 1287
>> 1288 config CPU_LOONGSON3_WORKAROUNDS
>> 1289 bool "Loongson-3 LLSC Workarounds"
>> 1290 default y if SMP
>> 1291 depends on CPU_LOONGSON64
>> 1292 help
>> 1293 Loongson-3 processors have the llsc issues which require workarounds.
>> 1294 Without workarounds the system may hang unexpectedly.
>> 1295
>> 1296 Say Y, unless you know what you are doing.
>> 1297
>> 1298 config CPU_LOONGSON3_CPUCFG_EMULATION
>> 1299 bool "Emulate the CPUCFG instruction on older Loongson cores"
>> 1300 default y
>> 1301 depends on CPU_LOONGSON64
>> 1302 help
>> 1303 Loongson-3A R4 and newer have the CPUCFG instruction available for
>> 1304 userland to query CPU capabilities, much like CPUID on x86. This
>> 1305 option provides emulation of the instruction on older Loongson
>> 1306 cores, back to Loongson-3A1000.
>> 1307
>> 1308 If unsure, please say Y.
>> 1309
>> 1310 config CPU_LOONGSON2E
>> 1311 bool "Loongson 2E"
>> 1312 depends on SYS_HAS_CPU_LOONGSON2E
>> 1313 select CPU_LOONGSON2EF
>> 1314 help
>> 1315 The Loongson 2E processor implements the MIPS III instruction set
>> 1316 with many extensions.
>> 1317
>> 1318 It has an internal FPGA northbridge, which is compatible to
>> 1319 bonito64.
>> 1320
>> 1321 config CPU_LOONGSON2F
>> 1322 bool "Loongson 2F"
>> 1323 depends on SYS_HAS_CPU_LOONGSON2F
>> 1324 select CPU_LOONGSON2EF
>> 1325 help
>> 1326 The Loongson 2F processor implements the MIPS III instruction set
>> 1327 with many extensions.
>> 1328
>> 1329 Loongson2F have built-in DDR2 and PCIX controller. The PCIX controller
>> 1330 have a similar programming interface with FPGA northbridge used in
>> 1331 Loongson2E.
>> 1332
>> 1333 config CPU_LOONGSON1B
>> 1334 bool "Loongson 1B"
>> 1335 depends on SYS_HAS_CPU_LOONGSON1B
>> 1336 select CPU_LOONGSON32
>> 1337 select LEDS_GPIO_REGISTER
>> 1338 help
>> 1339 The Loongson 1B is a 32-bit SoC, which implements the MIPS32
>> 1340 Release 1 instruction set and part of the MIPS32 Release 2
>> 1341 instruction set.
>> 1342
>> 1343 config CPU_LOONGSON1C
>> 1344 bool "Loongson 1C"
>> 1345 depends on SYS_HAS_CPU_LOONGSON1C
>> 1346 select CPU_LOONGSON32
>> 1347 select LEDS_GPIO_REGISTER
>> 1348 help
>> 1349 The Loongson 1C is a 32-bit SoC, which implements the MIPS32
>> 1350 Release 1 instruction set and part of the MIPS32 Release 2
>> 1351 instruction set.
>> 1352
>> 1353 config CPU_MIPS32_R1
>> 1354 bool "MIPS32 Release 1"
>> 1355 depends on SYS_HAS_CPU_MIPS32_R1
>> 1356 select CPU_HAS_PREFETCH
>> 1357 select CPU_SUPPORTS_32BIT_KERNEL
>> 1358 select CPU_SUPPORTS_HIGHMEM
>> 1359 help
>> 1360 Choose this option to build a kernel for release 1 or later of the
>> 1361 MIPS32 architecture. Most modern embedded systems with a 32-bit
>> 1362 MIPS processor are based on a MIPS32 processor. If you know the
>> 1363 specific type of processor in your system, choose those that one
>> 1364 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
>> 1365 Release 2 of the MIPS32 architecture is available since several
>> 1366 years so chances are you even have a MIPS32 Release 2 processor
>> 1367 in which case you should choose CPU_MIPS32_R2 instead for better
>> 1368 performance.
>> 1369
>> 1370 config CPU_MIPS32_R2
>> 1371 bool "MIPS32 Release 2"
>> 1372 depends on SYS_HAS_CPU_MIPS32_R2
>> 1373 select CPU_HAS_PREFETCH
>> 1374 select CPU_SUPPORTS_32BIT_KERNEL
>> 1375 select CPU_SUPPORTS_HIGHMEM
>> 1376 select CPU_SUPPORTS_MSA
>> 1377 select HAVE_KVM
>> 1378 help
>> 1379 Choose this option to build a kernel for release 2 or later of the
>> 1380 MIPS32 architecture. Most modern embedded systems with a 32-bit
>> 1381 MIPS processor are based on a MIPS32 processor. If you know the
>> 1382 specific type of processor in your system, choose those that one
>> 1383 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
>> 1384
>> 1385 config CPU_MIPS32_R5
>> 1386 bool "MIPS32 Release 5"
>> 1387 depends on SYS_HAS_CPU_MIPS32_R5
>> 1388 select CPU_HAS_PREFETCH
>> 1389 select CPU_SUPPORTS_32BIT_KERNEL
>> 1390 select CPU_SUPPORTS_HIGHMEM
>> 1391 select CPU_SUPPORTS_MSA
>> 1392 select HAVE_KVM
>> 1393 select MIPS_O32_FP64_SUPPORT
>> 1394 help
>> 1395 Choose this option to build a kernel for release 5 or later of the
>> 1396 MIPS32 architecture. New MIPS processors, starting with the Warrior
>> 1397 family, are based on a MIPS32r5 processor. If you own an older
>> 1398 processor, you probably need to select MIPS32r1 or MIPS32r2 instead.
>> 1399
>> 1400 config CPU_MIPS32_R6
>> 1401 bool "MIPS32 Release 6"
>> 1402 depends on SYS_HAS_CPU_MIPS32_R6
>> 1403 select CPU_HAS_PREFETCH
>> 1404 select CPU_NO_LOAD_STORE_LR
>> 1405 select CPU_SUPPORTS_32BIT_KERNEL
>> 1406 select CPU_SUPPORTS_HIGHMEM
>> 1407 select CPU_SUPPORTS_MSA
>> 1408 select HAVE_KVM
>> 1409 select MIPS_O32_FP64_SUPPORT
>> 1410 help
>> 1411 Choose this option to build a kernel for release 6 or later of the
>> 1412 MIPS32 architecture. New MIPS processors, starting with the Warrior
>> 1413 family, are based on a MIPS32r6 processor. If you own an older
>> 1414 processor, you probably need to select MIPS32r1 or MIPS32r2 instead.
>> 1415
>> 1416 config CPU_MIPS64_R1
>> 1417 bool "MIPS64 Release 1"
>> 1418 depends on SYS_HAS_CPU_MIPS64_R1
>> 1419 select CPU_HAS_PREFETCH
>> 1420 select CPU_SUPPORTS_32BIT_KERNEL
>> 1421 select CPU_SUPPORTS_64BIT_KERNEL
>> 1422 select CPU_SUPPORTS_HIGHMEM
>> 1423 select CPU_SUPPORTS_HUGEPAGES
>> 1424 help
>> 1425 Choose this option to build a kernel for release 1 or later of the
>> 1426 MIPS64 architecture. Many modern embedded systems with a 64-bit
>> 1427 MIPS processor are based on a MIPS64 processor. If you know the
>> 1428 specific type of processor in your system, choose those that one
>> 1429 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
>> 1430 Release 2 of the MIPS64 architecture is available since several
>> 1431 years so chances are you even have a MIPS64 Release 2 processor
>> 1432 in which case you should choose CPU_MIPS64_R2 instead for better
>> 1433 performance.
>> 1434
>> 1435 config CPU_MIPS64_R2
>> 1436 bool "MIPS64 Release 2"
>> 1437 depends on SYS_HAS_CPU_MIPS64_R2
>> 1438 select CPU_HAS_PREFETCH
>> 1439 select CPU_SUPPORTS_32BIT_KERNEL
>> 1440 select CPU_SUPPORTS_64BIT_KERNEL
>> 1441 select CPU_SUPPORTS_HIGHMEM
>> 1442 select CPU_SUPPORTS_HUGEPAGES
>> 1443 select CPU_SUPPORTS_MSA
>> 1444 select HAVE_KVM
>> 1445 help
>> 1446 Choose this option to build a kernel for release 2 or later of the
>> 1447 MIPS64 architecture. Many modern embedded systems with a 64-bit
>> 1448 MIPS processor are based on a MIPS64 processor. If you know the
>> 1449 specific type of processor in your system, choose those that one
>> 1450 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
>> 1451
>> 1452 config CPU_MIPS64_R5
>> 1453 bool "MIPS64 Release 5"
>> 1454 depends on SYS_HAS_CPU_MIPS64_R5
>> 1455 select CPU_HAS_PREFETCH
>> 1456 select CPU_SUPPORTS_32BIT_KERNEL
>> 1457 select CPU_SUPPORTS_64BIT_KERNEL
>> 1458 select CPU_SUPPORTS_HIGHMEM
>> 1459 select CPU_SUPPORTS_HUGEPAGES
>> 1460 select CPU_SUPPORTS_MSA
>> 1461 select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
>> 1462 select HAVE_KVM
>> 1463 help
>> 1464 Choose this option to build a kernel for release 5 or later of the
>> 1465 MIPS64 architecture. This is a intermediate MIPS architecture
>> 1466 release partly implementing release 6 features. Though there is no
>> 1467 any hardware known to be based on this release.
>> 1468
>> 1469 config CPU_MIPS64_R6
>> 1470 bool "MIPS64 Release 6"
>> 1471 depends on SYS_HAS_CPU_MIPS64_R6
>> 1472 select CPU_HAS_PREFETCH
>> 1473 select CPU_NO_LOAD_STORE_LR
>> 1474 select CPU_SUPPORTS_32BIT_KERNEL
>> 1475 select CPU_SUPPORTS_64BIT_KERNEL
>> 1476 select CPU_SUPPORTS_HIGHMEM
>> 1477 select CPU_SUPPORTS_HUGEPAGES
>> 1478 select CPU_SUPPORTS_MSA
>> 1479 select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
>> 1480 select HAVE_KVM
>> 1481 help
>> 1482 Choose this option to build a kernel for release 6 or later of the
>> 1483 MIPS64 architecture. New MIPS processors, starting with the Warrior
>> 1484 family, are based on a MIPS64r6 processor. If you own an older
>> 1485 processor, you probably need to select MIPS64r1 or MIPS64r2 instead.
>> 1486
>> 1487 config CPU_P5600
>> 1488 bool "MIPS Warrior P5600"
>> 1489 depends on SYS_HAS_CPU_P5600
>> 1490 select CPU_HAS_PREFETCH
>> 1491 select CPU_SUPPORTS_32BIT_KERNEL
>> 1492 select CPU_SUPPORTS_HIGHMEM
>> 1493 select CPU_SUPPORTS_MSA
>> 1494 select CPU_SUPPORTS_CPUFREQ
>> 1495 select CPU_MIPSR2_IRQ_VI
>> 1496 select CPU_MIPSR2_IRQ_EI
>> 1497 select HAVE_KVM
>> 1498 select MIPS_O32_FP64_SUPPORT
>> 1499 help
>> 1500 Choose this option to build a kernel for MIPS Warrior P5600 CPU.
>> 1501 It's based on MIPS32r5 ISA with XPA, EVA, dual/quad issue exec pipes,
>> 1502 MMU with two-levels TLB, UCA, MSA, MDU core level features and system
>> 1503 level features like up to six P5600 calculation cores, CM2 with L2
>> 1504 cache, IOCU/IOMMU (though might be unused depending on the system-
>> 1505 specific IP core configuration), GIC, CPC, virtualisation module,
>> 1506 eJTAG and PDtrace.
>> 1507
>> 1508 config CPU_R3000
>> 1509 bool "R3000"
>> 1510 depends on SYS_HAS_CPU_R3000
>> 1511 select CPU_HAS_WB
>> 1512 select CPU_R3K_TLB
>> 1513 select CPU_SUPPORTS_32BIT_KERNEL
>> 1514 select CPU_SUPPORTS_HIGHMEM
>> 1515 help
>> 1516 Please make sure to pick the right CPU type. Linux/MIPS is not
>> 1517 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
>> 1518 *not* work on R4000 machines and vice versa. However, since most
>> 1519 of the supported machines have an R4000 (or similar) CPU, R4x00
>> 1520 might be a safe bet. If the resulting kernel does not work,
>> 1521 try to recompile with R3000.
>> 1522
>> 1523 config CPU_R4300
>> 1524 bool "R4300"
>> 1525 depends on SYS_HAS_CPU_R4300
>> 1526 select CPU_SUPPORTS_32BIT_KERNEL
>> 1527 select CPU_SUPPORTS_64BIT_KERNEL
>> 1528 help
>> 1529 MIPS Technologies R4300-series processors.
>> 1530
>> 1531 config CPU_R4X00
>> 1532 bool "R4x00"
>> 1533 depends on SYS_HAS_CPU_R4X00
>> 1534 select CPU_SUPPORTS_32BIT_KERNEL
>> 1535 select CPU_SUPPORTS_64BIT_KERNEL
>> 1536 select CPU_SUPPORTS_HUGEPAGES
>> 1537 help
>> 1538 MIPS Technologies R4000-series processors other than 4300, including
>> 1539 the R4000, R4400, R4600, and 4700.
>> 1540
>> 1541 config CPU_TX49XX
>> 1542 bool "R49XX"
>> 1543 depends on SYS_HAS_CPU_TX49XX
>> 1544 select CPU_HAS_PREFETCH
>> 1545 select CPU_SUPPORTS_32BIT_KERNEL
>> 1546 select CPU_SUPPORTS_64BIT_KERNEL
>> 1547 select CPU_SUPPORTS_HUGEPAGES
>> 1548
>> 1549 config CPU_R5000
>> 1550 bool "R5000"
>> 1551 depends on SYS_HAS_CPU_R5000
>> 1552 select CPU_SUPPORTS_32BIT_KERNEL
>> 1553 select CPU_SUPPORTS_64BIT_KERNEL
>> 1554 select CPU_SUPPORTS_HUGEPAGES
>> 1555 help
>> 1556 MIPS Technologies R5000-series processors other than the Nevada.
>> 1557
>> 1558 config CPU_R5500
>> 1559 bool "R5500"
>> 1560 depends on SYS_HAS_CPU_R5500
>> 1561 select CPU_SUPPORTS_32BIT_KERNEL
>> 1562 select CPU_SUPPORTS_64BIT_KERNEL
>> 1563 select CPU_SUPPORTS_HUGEPAGES
>> 1564 help
>> 1565 NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV
>> 1566 instruction set.
>> 1567
>> 1568 config CPU_NEVADA
>> 1569 bool "RM52xx"
>> 1570 depends on SYS_HAS_CPU_NEVADA
>> 1571 select CPU_SUPPORTS_32BIT_KERNEL
>> 1572 select CPU_SUPPORTS_64BIT_KERNEL
>> 1573 select CPU_SUPPORTS_HUGEPAGES
>> 1574 help
>> 1575 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
>> 1576
>> 1577 config CPU_R10000
>> 1578 bool "R10000"
>> 1579 depends on SYS_HAS_CPU_R10000
>> 1580 select CPU_HAS_PREFETCH
>> 1581 select CPU_SUPPORTS_32BIT_KERNEL
>> 1582 select CPU_SUPPORTS_64BIT_KERNEL
>> 1583 select CPU_SUPPORTS_HIGHMEM
>> 1584 select CPU_SUPPORTS_HUGEPAGES
>> 1585 help
>> 1586 MIPS Technologies R10000-series processors.
>> 1587
>> 1588 config CPU_RM7000
>> 1589 bool "RM7000"
>> 1590 depends on SYS_HAS_CPU_RM7000
>> 1591 select CPU_HAS_PREFETCH
>> 1592 select CPU_SUPPORTS_32BIT_KERNEL
>> 1593 select CPU_SUPPORTS_64BIT_KERNEL
>> 1594 select CPU_SUPPORTS_HIGHMEM
>> 1595 select CPU_SUPPORTS_HUGEPAGES
>> 1596
>> 1597 config CPU_SB1
>> 1598 bool "SB1"
>> 1599 depends on SYS_HAS_CPU_SB1
>> 1600 select CPU_SUPPORTS_32BIT_KERNEL
>> 1601 select CPU_SUPPORTS_64BIT_KERNEL
>> 1602 select CPU_SUPPORTS_HIGHMEM
>> 1603 select CPU_SUPPORTS_HUGEPAGES
>> 1604 select WEAK_ORDERING
>> 1605
>> 1606 config CPU_CAVIUM_OCTEON
>> 1607 bool "Cavium Octeon processor"
>> 1608 depends on SYS_HAS_CPU_CAVIUM_OCTEON
>> 1609 select CPU_HAS_PREFETCH
>> 1610 select CPU_SUPPORTS_64BIT_KERNEL
>> 1611 select WEAK_ORDERING
>> 1612 select CPU_SUPPORTS_HIGHMEM
>> 1613 select CPU_SUPPORTS_HUGEPAGES
>> 1614 select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 1615 select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>> 1616 select MIPS_L1_CACHE_SHIFT_7
>> 1617 select HAVE_KVM
>> 1618 help
>> 1619 The Cavium Octeon processor is a highly integrated chip containing
>> 1620 many ethernet hardware widgets for networking tasks. The processor
>> 1621 can have up to 16 Mips64v2 cores and 8 integrated gigabit ethernets.
>> 1622 Full details can be found at http://www.caviumnetworks.com.
>> 1623
>> 1624 config CPU_BMIPS
>> 1625 bool "Broadcom BMIPS"
>> 1626 depends on SYS_HAS_CPU_BMIPS
>> 1627 select CPU_MIPS32
>> 1628 select CPU_BMIPS32_3300 if SYS_HAS_CPU_BMIPS32_3300
>> 1629 select CPU_BMIPS4350 if SYS_HAS_CPU_BMIPS4350
>> 1630 select CPU_BMIPS4380 if SYS_HAS_CPU_BMIPS4380
>> 1631 select CPU_BMIPS5000 if SYS_HAS_CPU_BMIPS5000
>> 1632 select CPU_SUPPORTS_32BIT_KERNEL
>> 1633 select DMA_NONCOHERENT
>> 1634 select IRQ_MIPS_CPU
>> 1635 select SWAP_IO_SPACE
>> 1636 select WEAK_ORDERING
>> 1637 select CPU_SUPPORTS_HIGHMEM
>> 1638 select CPU_HAS_PREFETCH
>> 1639 select CPU_SUPPORTS_CPUFREQ
>> 1640 select MIPS_EXTERNAL_TIMER
>> 1641 select GENERIC_IRQ_MIGRATION if HOTPLUG_CPU
>> 1642 help
>> 1643 Support for BMIPS32/3300/4350/4380 and BMIPS5000 processors.
>> 1644
427 endchoice 1645 endchoice
428 1646
429 config MODULE_SECTIONS !! 1647 config CPU_MIPS32_3_5_FEATURES
>> 1648 bool "MIPS32 Release 3.5 Features"
>> 1649 depends on SYS_HAS_CPU_MIPS32_R3_5
>> 1650 depends on CPU_MIPS32_R2 || CPU_MIPS32_R5 || CPU_MIPS32_R6 || \
>> 1651 CPU_P5600
>> 1652 help
>> 1653 Choose this option to build a kernel for release 2 or later of the
>> 1654 MIPS32 architecture including features from the 3.5 release such as
>> 1655 support for Enhanced Virtual Addressing (EVA).
>> 1656
>> 1657 config CPU_MIPS32_3_5_EVA
>> 1658 bool "Enhanced Virtual Addressing (EVA)"
>> 1659 depends on CPU_MIPS32_3_5_FEATURES
>> 1660 select EVA
>> 1661 default y
>> 1662 help
>> 1663 Choose this option if you want to enable the Enhanced Virtual
>> 1664 Addressing (EVA) on your MIPS32 core (such as proAptiv).
>> 1665 One of its primary benefits is an increase in the maximum size
>> 1666 of lowmem (up to 3GB). If unsure, say 'N' here.
>> 1667
>> 1668 config CPU_MIPS32_R5_FEATURES
>> 1669 bool "MIPS32 Release 5 Features"
>> 1670 depends on SYS_HAS_CPU_MIPS32_R5
>> 1671 depends on CPU_MIPS32_R2 || CPU_MIPS32_R5 || CPU_P5600
>> 1672 help
>> 1673 Choose this option to build a kernel for release 2 or later of the
>> 1674 MIPS32 architecture including features from release 5 such as
>> 1675 support for Extended Physical Addressing (XPA).
>> 1676
>> 1677 config CPU_MIPS32_R5_XPA
>> 1678 bool "Extended Physical Addressing (XPA)"
>> 1679 depends on CPU_MIPS32_R5_FEATURES
>> 1680 depends on !EVA
>> 1681 depends on !PAGE_SIZE_4KB
>> 1682 depends on SYS_SUPPORTS_HIGHMEM
>> 1683 select XPA
>> 1684 select HIGHMEM
>> 1685 select PHYS_ADDR_T_64BIT
>> 1686 default n
>> 1687 help
>> 1688 Choose this option if you want to enable the Extended Physical
>> 1689 Addressing (XPA) on your MIPS32 core (such as P5600 series). The
>> 1690 benefit is to increase physical addressing equal to or greater
>> 1691 than 40 bits. Note that this has the side effect of turning on
>> 1692 64-bit addressing which in turn makes the PTEs 64-bit in size.
>> 1693 If unsure, say 'N' here.
>> 1694
>> 1695 if CPU_LOONGSON2F
>> 1696 config CPU_NOP_WORKAROUNDS
430 bool 1697 bool
431 select HAVE_MOD_ARCH_SPECIFIC <<
432 1698
433 config SMP !! 1699 config CPU_JUMP_WORKAROUNDS
434 bool "Symmetric Multi-Processing" !! 1700 bool
>> 1701
>> 1702 config CPU_LOONGSON2F_WORKAROUNDS
>> 1703 bool "Loongson 2F Workarounds"
>> 1704 default y
>> 1705 select CPU_NOP_WORKAROUNDS
>> 1706 select CPU_JUMP_WORKAROUNDS
435 help 1707 help
436 This enables support for systems wit !! 1708 Loongson 2F01 / 2F02 processors have the NOP & JUMP issues which
437 you say N here, the kernel will run !! 1709 require workarounds. Without workarounds the system may hang
438 multiprocessor machines, but will us !! 1710 unexpectedly. For more information please refer to the gas
439 multiprocessor machine. If you say Y !! 1711 -mfix-loongson2f-nop and -mfix-loongson2f-jump options.
440 on many, but not all, single process !! 1712
441 processor machine, the kernel will r !! 1713 Loongson 2F03 and later have fixed these issues and no workarounds
442 here. !! 1714 are needed. The workarounds have no significant side effect on them
>> 1715 but may decrease the performance of the system so this option should
>> 1716 be disabled unless the kernel is intended to be run on 2F01 or 2F02
>> 1717 systems.
443 1718
444 If you don't know what to do here, s !! 1719 If unsure, please say Y.
>> 1720 endif # CPU_LOONGSON2F
445 1721
446 config SCHED_MC !! 1722 config SYS_SUPPORTS_ZBOOT
447 bool "Multi-core scheduler support" !! 1723 bool
448 depends on SMP !! 1724 select HAVE_KERNEL_GZIP
449 help !! 1725 select HAVE_KERNEL_BZIP2
450 Multi-core scheduler support improve !! 1726 select HAVE_KERNEL_LZ4
451 making when dealing with multi-core !! 1727 select HAVE_KERNEL_LZMA
452 increased overhead in some places. I !! 1728 select HAVE_KERNEL_LZO
>> 1729 select HAVE_KERNEL_XZ
>> 1730 select HAVE_KERNEL_ZSTD
453 1731
454 config NR_CPUS !! 1732 config SYS_SUPPORTS_ZBOOT_UART16550
455 int "Maximum number of CPUs (2-512)" !! 1733 bool
456 depends on SMP !! 1734 select SYS_SUPPORTS_ZBOOT
457 range 2 512 if !RISCV_SBI_V01 <<
458 range 2 32 if RISCV_SBI_V01 && 32BIT <<
459 range 2 64 if RISCV_SBI_V01 && 64BIT <<
460 default "32" if 32BIT <<
461 default "64" if 64BIT <<
462 1735
463 config HOTPLUG_CPU !! 1736 config SYS_SUPPORTS_ZBOOT_UART_PROM
464 bool "Support for hot-pluggable CPUs" !! 1737 bool
465 depends on SMP !! 1738 select SYS_SUPPORTS_ZBOOT
466 select GENERIC_IRQ_MIGRATION !! 1739
>> 1740 config CPU_LOONGSON2EF
>> 1741 bool
>> 1742 select CPU_SUPPORTS_32BIT_KERNEL
>> 1743 select CPU_SUPPORTS_64BIT_KERNEL
>> 1744 select CPU_SUPPORTS_HIGHMEM
>> 1745 select CPU_SUPPORTS_HUGEPAGES
>> 1746
>> 1747 config CPU_LOONGSON32
>> 1748 bool
>> 1749 select CPU_MIPS32
>> 1750 select CPU_MIPSR2
>> 1751 select CPU_HAS_PREFETCH
>> 1752 select CPU_SUPPORTS_32BIT_KERNEL
>> 1753 select CPU_SUPPORTS_HIGHMEM
>> 1754 select CPU_SUPPORTS_CPUFREQ
>> 1755
>> 1756 config CPU_BMIPS32_3300
>> 1757 select SMP_UP if SMP
>> 1758 bool
>> 1759
>> 1760 config CPU_BMIPS4350
>> 1761 bool
>> 1762 select SYS_SUPPORTS_SMP
>> 1763 select SYS_SUPPORTS_HOTPLUG_CPU
>> 1764
>> 1765 config CPU_BMIPS4380
>> 1766 bool
>> 1767 select MIPS_L1_CACHE_SHIFT_6
>> 1768 select SYS_SUPPORTS_SMP
>> 1769 select SYS_SUPPORTS_HOTPLUG_CPU
>> 1770 select CPU_HAS_RIXI
>> 1771
>> 1772 config CPU_BMIPS5000
>> 1773 bool
>> 1774 select MIPS_CPU_SCACHE
>> 1775 select MIPS_L1_CACHE_SHIFT_7
>> 1776 select SYS_SUPPORTS_SMP
>> 1777 select SYS_SUPPORTS_HOTPLUG_CPU
>> 1778 select CPU_HAS_RIXI
>> 1779
>> 1780 config SYS_HAS_CPU_LOONGSON64
>> 1781 bool
>> 1782 select CPU_SUPPORTS_CPUFREQ
>> 1783 select CPU_HAS_RIXI
>> 1784
>> 1785 config SYS_HAS_CPU_LOONGSON2E
>> 1786 bool
>> 1787
>> 1788 config SYS_HAS_CPU_LOONGSON2F
>> 1789 bool
>> 1790 select CPU_SUPPORTS_CPUFREQ
>> 1791 select CPU_SUPPORTS_ADDRWINCFG if 64BIT
>> 1792
>> 1793 config SYS_HAS_CPU_LOONGSON1B
>> 1794 bool
>> 1795
>> 1796 config SYS_HAS_CPU_LOONGSON1C
>> 1797 bool
>> 1798
>> 1799 config SYS_HAS_CPU_MIPS32_R1
>> 1800 bool
>> 1801
>> 1802 config SYS_HAS_CPU_MIPS32_R2
>> 1803 bool
>> 1804
>> 1805 config SYS_HAS_CPU_MIPS32_R3_5
>> 1806 bool
>> 1807
>> 1808 config SYS_HAS_CPU_MIPS32_R5
>> 1809 bool
>> 1810
>> 1811 config SYS_HAS_CPU_MIPS32_R6
>> 1812 bool
>> 1813
>> 1814 config SYS_HAS_CPU_MIPS64_R1
>> 1815 bool
>> 1816
>> 1817 config SYS_HAS_CPU_MIPS64_R2
>> 1818 bool
>> 1819
>> 1820 config SYS_HAS_CPU_MIPS64_R5
>> 1821 bool
>> 1822
>> 1823 config SYS_HAS_CPU_MIPS64_R6
>> 1824 bool
>> 1825
>> 1826 config SYS_HAS_CPU_P5600
>> 1827 bool
>> 1828
>> 1829 config SYS_HAS_CPU_R3000
>> 1830 bool
>> 1831
>> 1832 config SYS_HAS_CPU_R4300
>> 1833 bool
>> 1834
>> 1835 config SYS_HAS_CPU_R4X00
>> 1836 bool
>> 1837
>> 1838 config SYS_HAS_CPU_TX49XX
>> 1839 bool
>> 1840
>> 1841 config SYS_HAS_CPU_R5000
>> 1842 bool
>> 1843
>> 1844 config SYS_HAS_CPU_R5500
>> 1845 bool
>> 1846
>> 1847 config SYS_HAS_CPU_NEVADA
>> 1848 bool
>> 1849
>> 1850 config SYS_HAS_CPU_R10000
>> 1851 bool
>> 1852
>> 1853 config SYS_HAS_CPU_RM7000
>> 1854 bool
>> 1855
>> 1856 config SYS_HAS_CPU_SB1
>> 1857 bool
>> 1858
>> 1859 config SYS_HAS_CPU_CAVIUM_OCTEON
>> 1860 bool
>> 1861
>> 1862 config SYS_HAS_CPU_BMIPS
>> 1863 bool
>> 1864
>> 1865 config SYS_HAS_CPU_BMIPS32_3300
>> 1866 bool
>> 1867 select SYS_HAS_CPU_BMIPS
>> 1868
>> 1869 config SYS_HAS_CPU_BMIPS4350
>> 1870 bool
>> 1871 select SYS_HAS_CPU_BMIPS
>> 1872
>> 1873 config SYS_HAS_CPU_BMIPS4380
>> 1874 bool
>> 1875 select SYS_HAS_CPU_BMIPS
>> 1876
>> 1877 config SYS_HAS_CPU_BMIPS5000
>> 1878 bool
>> 1879 select SYS_HAS_CPU_BMIPS
>> 1880
>> 1881 #
>> 1882 # CPU may reorder R->R, R->W, W->R, W->W
>> 1883 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
>> 1884 #
>> 1885 config WEAK_ORDERING
>> 1886 bool
>> 1887
>> 1888 #
>> 1889 # CPU may reorder reads and writes beyond LL/SC
>> 1890 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
>> 1891 #
>> 1892 config WEAK_REORDERING_BEYOND_LLSC
>> 1893 bool
>> 1894 endmenu
>> 1895
>> 1896 #
>> 1897 # These two indicate any level of the MIPS32 and MIPS64 architecture
>> 1898 #
>> 1899 config CPU_MIPS32
>> 1900 bool
>> 1901 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2 || CPU_MIPS32_R5 || \
>> 1902 CPU_MIPS32_R6 || CPU_P5600
>> 1903
>> 1904 config CPU_MIPS64
>> 1905 bool
>> 1906 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2 || CPU_MIPS64_R5 || \
>> 1907 CPU_MIPS64_R6 || CPU_LOONGSON64 || CPU_CAVIUM_OCTEON
>> 1908
>> 1909 #
>> 1910 # These indicate the revision of the architecture
>> 1911 #
>> 1912 config CPU_MIPSR1
>> 1913 bool
>> 1914 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
>> 1915
>> 1916 config CPU_MIPSR2
>> 1917 bool
>> 1918 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
>> 1919 select CPU_HAS_RIXI
>> 1920 select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
>> 1921 select MIPS_SPRAM
>> 1922
>> 1923 config CPU_MIPSR5
>> 1924 bool
>> 1925 default y if CPU_MIPS32_R5 || CPU_MIPS64_R5 || CPU_P5600
>> 1926 select CPU_HAS_RIXI
>> 1927 select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
>> 1928 select MIPS_SPRAM
>> 1929
>> 1930 config CPU_MIPSR6
>> 1931 bool
>> 1932 default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
>> 1933 select CPU_HAS_RIXI
>> 1934 select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
>> 1935 select HAVE_ARCH_BITREVERSE
>> 1936 select MIPS_ASID_BITS_VARIABLE
>> 1937 select MIPS_CRC_SUPPORT
>> 1938 select MIPS_SPRAM
>> 1939
>> 1940 config TARGET_ISA_REV
>> 1941 int
>> 1942 default 1 if CPU_MIPSR1
>> 1943 default 2 if CPU_MIPSR2
>> 1944 default 5 if CPU_MIPSR5
>> 1945 default 6 if CPU_MIPSR6
>> 1946 default 0
467 help 1947 help
>> 1948 Reflects the ISA revision being targeted by the kernel build. This
>> 1949 is effectively the Kconfig equivalent of MIPS_ISA_REV.
468 1950
469 Say Y here to experiment with turnin !! 1951 config EVA
470 can be controlled through /sys/devic !! 1952 bool
471 1953
472 Say N if you want to disable CPU hot !! 1954 config XPA
>> 1955 bool
>> 1956
>> 1957 config SYS_SUPPORTS_32BIT_KERNEL
>> 1958 bool
>> 1959 config SYS_SUPPORTS_64BIT_KERNEL
>> 1960 bool
>> 1961 config CPU_SUPPORTS_32BIT_KERNEL
>> 1962 bool
>> 1963 config CPU_SUPPORTS_64BIT_KERNEL
>> 1964 bool
>> 1965 config CPU_SUPPORTS_CPUFREQ
>> 1966 bool
>> 1967 config CPU_SUPPORTS_ADDRWINCFG
>> 1968 bool
>> 1969 config CPU_SUPPORTS_HUGEPAGES
>> 1970 bool
>> 1971 depends on !(32BIT && (PHYS_ADDR_T_64BIT || EVA))
>> 1972 config MIPS_PGD_C0_CONTEXT
>> 1973 bool
>> 1974 depends on 64BIT
>> 1975 default y if (CPU_MIPSR2 || CPU_MIPSR6)
>> 1976
>> 1977 #
>> 1978 # Set to y for ptrace access to watch registers.
>> 1979 #
>> 1980 config HARDWARE_WATCHPOINTS
>> 1981 bool
>> 1982 default y if CPU_MIPSR1 || CPU_MIPSR2 || CPU_MIPSR6
>> 1983
>> 1984 menu "Kernel type"
473 1985
474 choice 1986 choice
475 prompt "CPU Tuning" !! 1987 prompt "Kernel code model"
476 default TUNE_GENERIC !! 1988 help
>> 1989 You should only select this option if you have a workload that
>> 1990 actually benefits from 64-bit processing or if your machine has
>> 1991 large memory. You will only be presented a single option in this
>> 1992 menu if your system does not support both 32-bit and 64-bit kernels.
>> 1993
>> 1994 config 32BIT
>> 1995 bool "32-bit kernel"
>> 1996 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
>> 1997 select TRAD_SIGNALS
>> 1998 help
>> 1999 Select this option if you want to build a 32-bit kernel.
477 2000
478 config TUNE_GENERIC !! 2001 config 64BIT
479 bool "generic" !! 2002 bool "64-bit kernel"
>> 2003 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
>> 2004 help
>> 2005 Select this option if you want to build a 64-bit kernel.
480 2006
481 endchoice 2007 endchoice
482 2008
483 # Common NUMA Features !! 2009 config MIPS_VA_BITS_48
484 config NUMA !! 2010 bool "48 bits virtual memory"
485 bool "NUMA Memory Allocation and Sched !! 2011 depends on 64BIT
486 depends on SMP && MMU <<
487 select ARCH_SUPPORTS_NUMA_BALANCING <<
488 select GENERIC_ARCH_NUMA <<
489 select HAVE_SETUP_PER_CPU_AREA <<
490 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
491 select NEED_PER_CPU_PAGE_FIRST_CHUNK <<
492 select OF_NUMA <<
493 select USE_PERCPU_NUMA_NODE_ID <<
494 help 2012 help
495 Enable NUMA (Non-Uniform Memory Acce !! 2013 Support a maximum at least 48 bits of application virtual
>> 2014 memory. Default is 40 bits or less, depending on the CPU.
>> 2015 For page sizes 16k and above, this option results in a small
>> 2016 memory overhead for page tables. For 4k page size, a fourth
>> 2017 level of page tables is added which imposes both a memory
>> 2018 overhead as well as slower TLB fault handling.
496 2019
497 The kernel will try to allocate memo !! 2020 If unsure, say N.
498 local memory of the CPU and add some <<
499 2021
500 config NODES_SHIFT !! 2022 config ZBOOT_LOAD_ADDRESS
501 int "Maximum NUMA Nodes (as a power of !! 2023 hex "Compressed kernel load address"
502 range 1 10 !! 2024 default 0xffffffff80400000 if BCM47XX
503 default "2" !! 2025 default 0x0
504 depends on NUMA !! 2026 depends on SYS_SUPPORTS_ZBOOT
505 help 2027 help
506 Specify the maximum number of NUMA N !! 2028 The address to load compressed kernel, aka vmlinuz.
507 system. Increases memory reserved t !! 2029
>> 2030 This is only used if non-zero.
>> 2031
>> 2032 choice
>> 2033 prompt "Kernel page size"
>> 2034 default PAGE_SIZE_4KB
>> 2035
>> 2036 config PAGE_SIZE_4KB
>> 2037 bool "4kB"
>> 2038 depends on !CPU_LOONGSON2EF && !CPU_LOONGSON64
>> 2039 help
>> 2040 This option select the standard 4kB Linux page size. On some
>> 2041 R3000-family processors this is the only available page size. Using
>> 2042 4kB page size will minimize memory consumption and is therefore
>> 2043 recommended for low memory systems.
>> 2044
>> 2045 config PAGE_SIZE_8KB
>> 2046 bool "8kB"
>> 2047 depends on CPU_CAVIUM_OCTEON
>> 2048 depends on !MIPS_VA_BITS_48
>> 2049 help
>> 2050 Using 8kB page size will result in higher performance kernel at
>> 2051 the price of higher memory consumption. This option is available
>> 2052 only on cnMIPS processors. Note that you will need a suitable Linux
>> 2053 distribution to support this.
>> 2054
>> 2055 config PAGE_SIZE_16KB
>> 2056 bool "16kB"
>> 2057 depends on !CPU_R3000
>> 2058 help
>> 2059 Using 16kB page size will result in higher performance kernel at
>> 2060 the price of higher memory consumption. This option is available on
>> 2061 all non-R3000 family processors. Note that you will need a suitable
>> 2062 Linux distribution to support this.
>> 2063
>> 2064 config PAGE_SIZE_32KB
>> 2065 bool "32kB"
>> 2066 depends on CPU_CAVIUM_OCTEON
>> 2067 depends on !MIPS_VA_BITS_48
>> 2068 help
>> 2069 Using 32kB page size will result in higher performance kernel at
>> 2070 the price of higher memory consumption. This option is available
>> 2071 only on cnMIPS cores. Note that you will need a suitable Linux
>> 2072 distribution to support this.
>> 2073
>> 2074 config PAGE_SIZE_64KB
>> 2075 bool "64kB"
>> 2076 depends on !CPU_R3000
>> 2077 help
>> 2078 Using 64kB page size will result in higher performance kernel at
>> 2079 the price of higher memory consumption. This option is available on
>> 2080 all non-R3000 family processor. Not that at the time of this
>> 2081 writing this option is still high experimental.
508 2082
509 config RISCV_ALTERNATIVE !! 2083 endchoice
>> 2084
>> 2085 config ARCH_FORCE_MAX_ORDER
>> 2086 int "Maximum zone order"
>> 2087 default "13" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_64KB
>> 2088 default "12" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_32KB
>> 2089 default "11" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_16KB
>> 2090 default "10"
>> 2091 help
>> 2092 The kernel memory allocator divides physically contiguous memory
>> 2093 blocks into "zones", where each zone is a power of two number of
>> 2094 pages. This option selects the largest power of two that the kernel
>> 2095 keeps in the memory allocator. If you need to allocate very large
>> 2096 blocks of physically contiguous memory, then you may need to
>> 2097 increase this value.
>> 2098
>> 2099 The page size is not necessarily 4KB. Keep this in mind
>> 2100 when choosing a value for this option.
>> 2101
>> 2102 config BOARD_SCACHE
510 bool 2103 bool
511 depends on !XIP_KERNEL <<
512 help <<
513 This Kconfig allows the kernel to au <<
514 erratum or cpufeature required by th <<
515 time. The code patching overhead is <<
516 once at boot and once on each module <<
517 2104
518 config RISCV_ALTERNATIVE_EARLY !! 2105 config IP22_CPU_SCACHE
519 bool 2106 bool
520 depends on RISCV_ALTERNATIVE !! 2107 select BOARD_SCACHE
521 help <<
522 Allows early patching of the kernel <<
523 2108
524 config RISCV_ISA_C !! 2109 #
525 bool "Emit compressed instructions whe !! 2110 # Support for a MIPS32 / MIPS64 style S-caches
526 default y !! 2111 #
527 help !! 2112 config MIPS_CPU_SCACHE
528 Adds "C" to the ISA subsets that the !! 2113 bool
529 when building Linux, which results i !! 2114 select BOARD_SCACHE
530 Linux binary. !! 2115
531 !! 2116 config R5000_CPU_SCACHE
532 If you don't know what to do here, s !! 2117 bool
533 !! 2118 select BOARD_SCACHE
534 config RISCV_ISA_SVNAPOT !! 2119
535 bool "Svnapot extension support for su !! 2120 config RM7000_CPU_SCACHE
536 depends on 64BIT && MMU !! 2121 bool
537 depends on RISCV_ALTERNATIVE !! 2122 select BOARD_SCACHE
538 default y !! 2123
>> 2124 config SIBYTE_DMA_PAGEOPS
>> 2125 bool "Use DMA to clear/copy pages"
>> 2126 depends on CPU_SB1
539 help 2127 help
540 Allow kernel to detect the Svnapot I !! 2128 Instead of using the CPU to zero and copy pages, use a Data Mover
541 time and enable its usage. !! 2129 channel. These DMA channels are otherwise unused by the standard
>> 2130 SiByte Linux port. Seems to give a small performance benefit.
>> 2131
>> 2132 config CPU_HAS_PREFETCH
>> 2133 bool
542 2134
543 The Svnapot extension is used to mar !! 2135 config CPU_GENERIC_DUMP_TLB
544 of contiguous virtual-to-physical tr !! 2136 bool
545 aligned power-of-2 (NAPOT) granulari !! 2137 default y if !CPU_R3000
546 size. When HUGETLBFS is also selecte !! 2138
547 allocates some memory for each NAPOT !! 2139 config MIPS_FP_SUPPORT
548 When optimizing for low memory consu !! 2140 bool "Floating Point support" if EXPERT
549 the Svnapot extension, it may be bet <<
550 <<
551 If you don't know what to do here, s <<
552 <<
553 config RISCV_ISA_SVPBMT <<
554 bool "Svpbmt extension support for sup <<
555 depends on 64BIT && MMU <<
556 depends on RISCV_ALTERNATIVE <<
557 default y 2141 default y
558 help 2142 help
559 Adds support to dynamically detect !! 2143 Select y to include support for floating point in the kernel
560 ISA-extension (Supervisor-mode: pag !! 2144 including initialization of FPU hardware, FP context save & restore
561 enable its usage. !! 2145 and emulation of an FPU where necessary. Without this support any
>> 2146 userland program attempting to use floating point instructions will
>> 2147 receive a SIGILL.
562 2148
563 The memory type for a page contains !! 2149 If you know that your userland will not attempt to use floating point
564 that indicate the cacheability, ide !! 2150 instructions then you can say n here to shrink the kernel a little.
565 properties for access to that page. <<
566 2151
567 The Svpbmt extension is only availa !! 2152 If unsure, say y.
568 2153
569 If you don't know what to do here, !! 2154 config CPU_R2300_FPU
>> 2155 bool
>> 2156 depends on MIPS_FP_SUPPORT
>> 2157 default y if CPU_R3000
570 2158
571 config TOOLCHAIN_HAS_V !! 2159 config CPU_R3K_TLB
572 bool 2160 bool
>> 2161
>> 2162 config CPU_R4K_FPU
>> 2163 bool
>> 2164 depends on MIPS_FP_SUPPORT
>> 2165 default y if !CPU_R2300_FPU
>> 2166
>> 2167 config CPU_R4K_CACHE_TLB
>> 2168 bool
>> 2169 default y if !(CPU_R3K_TLB || CPU_SB1 || CPU_CAVIUM_OCTEON)
>> 2170
>> 2171 config MIPS_MT_SMP
>> 2172 bool "MIPS MT SMP support (1 TC on each available VPE)"
573 default y 2173 default y
574 depends on !64BIT || $(cc-option,-mabi !! 2174 depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MIPSR6 && !CPU_MICROMIPS
575 depends on !32BIT || $(cc-option,-mabi !! 2175 select CPU_MIPSR2_IRQ_VI
576 depends on LLD_VERSION >= 140000 || LD !! 2176 select CPU_MIPSR2_IRQ_EI
577 depends on AS_HAS_OPTION_ARCH !! 2177 select SYNC_R4K
578 !! 2178 select MIPS_MT
579 config RISCV_ISA_V !! 2179 select SMP
580 bool "VECTOR extension support" !! 2180 select SMP_UP
581 depends on TOOLCHAIN_HAS_V !! 2181 select SYS_SUPPORTS_SMP
582 depends on FPU !! 2182 select SYS_SUPPORTS_SCHED_SMT
583 select DYNAMIC_SIGFRAME !! 2183 select MIPS_PERF_SHARED_TC_COUNTERS
584 default y !! 2184 help
>> 2185 This is a kernel model which is known as SMVP. This is supported
>> 2186 on cores with the MT ASE and uses the available VPEs to implement
>> 2187 virtual processors which supports SMP. This is equivalent to the
>> 2188 Intel Hyperthreading feature. For further information go to
>> 2189 <http://www.imgtec.com/mips/mips-multithreading.asp>.
>> 2190
>> 2191 config MIPS_MT
>> 2192 bool
>> 2193
>> 2194 config SCHED_SMT
>> 2195 bool "SMT (multithreading) scheduler support"
>> 2196 depends on SYS_SUPPORTS_SCHED_SMT
>> 2197 default n
585 help 2198 help
586 Say N here if you want to disable al !! 2199 SMT scheduler support improves the CPU scheduler's decision making
587 in the kernel. !! 2200 when dealing with MIPS MT enabled cores at a cost of slightly
>> 2201 increased overhead in some places. If unsure say N here.
588 2202
589 If you don't know what to do here, s !! 2203 config SYS_SUPPORTS_SCHED_SMT
>> 2204 bool
>> 2205
>> 2206 config SYS_SUPPORTS_MULTITHREADING
>> 2207 bool
590 2208
591 config RISCV_ISA_V_DEFAULT_ENABLE !! 2209 config MIPS_MT_FPAFF
592 bool "Enable userspace Vector by defau !! 2210 bool "Dynamic FPU affinity for FP-intensive threads"
593 depends on RISCV_ISA_V <<
594 default y 2211 default y
595 help !! 2212 depends on MIPS_MT_SMP
596 Say Y here if you want to enable Vec !! 2213
597 Otherwise, userspace has to make exp !! 2214 config MIPSR2_TO_R6_EMULATOR
598 Vector, or enable it via the sysctl !! 2215 bool "MIPS R2-to-R6 emulator"
599 !! 2216 depends on CPU_MIPSR6
600 If you don't know what to do here, s !! 2217 depends on MIPS_FP_SUPPORT
601 <<
602 config RISCV_ISA_V_UCOPY_THRESHOLD <<
603 int "Threshold size for vectorized use <<
604 depends on RISCV_ISA_V <<
605 default 768 <<
606 help <<
607 Prefer using vectorized copy_to_user <<
608 workload size exceeds this value. <<
609 <<
610 config RISCV_ISA_V_PREEMPTIVE <<
611 bool "Run kernel-mode Vector with kern <<
612 depends on PREEMPTION <<
613 depends on RISCV_ISA_V <<
614 default y 2218 default y
615 help 2219 help
616 Usually, in-kernel SIMD routines are !! 2220 Choose this option if you want to run non-R6 MIPS userland code.
617 Functions which envoke long running !! 2221 Even if you say 'Y' here, the emulator will still be disabled by
618 vector unit to prevent blocking othe !! 2222 default. You can enable it using the 'mipsr2emu' kernel option.
619 !! 2223 The only reason this is a build-time option is to save ~14K from the
620 This config allows kernel to run SIM !! 2224 final kernel image.
621 preemption. Enabling this config wil !! 2225
622 consumption due to the allocation of !! 2226 config SYS_SUPPORTS_VPE_LOADER
623 !! 2227 bool
624 config RISCV_ISA_ZAWRS !! 2228 depends on SYS_SUPPORTS_MULTITHREADING
625 bool "Zawrs extension support for more !! 2229 help
626 depends on RISCV_ALTERNATIVE !! 2230 Indicates that the platform supports the VPE loader, and provides
>> 2231 physical_memsize.
>> 2232
>> 2233 config MIPS_VPE_LOADER
>> 2234 bool "VPE loader support."
>> 2235 depends on SYS_SUPPORTS_VPE_LOADER && MODULES
>> 2236 select CPU_MIPSR2_IRQ_VI
>> 2237 select CPU_MIPSR2_IRQ_EI
>> 2238 select MIPS_MT
>> 2239 help
>> 2240 Includes a loader for loading an elf relocatable object
>> 2241 onto another VPE and running it.
>> 2242
>> 2243 config MIPS_VPE_LOADER_MT
>> 2244 bool
>> 2245 default "y"
>> 2246 depends on MIPS_VPE_LOADER
>> 2247
>> 2248 config MIPS_VPE_LOADER_TOM
>> 2249 bool "Load VPE program into memory hidden from linux"
>> 2250 depends on MIPS_VPE_LOADER
627 default y 2251 default y
628 help 2252 help
629 The Zawrs extension defines instruct !! 2253 The loader can use memory that is present but has been hidden from
630 which allow a hart to enter a low-po !! 2254 Linux using the kernel command line option "mem=xxMB". It's up to
631 hypervisor while waiting on a store !! 2255 you to ensure the amount you put in the option and the space your
632 use of these instructions in the ker !! 2256 program requires is less or equal to the amount physically present.
633 detected at boot. !! 2257
>> 2258 config MIPS_VPE_APSP_API
>> 2259 bool "Enable support for AP/SP API (RTLX)"
>> 2260 depends on MIPS_VPE_LOADER
>> 2261
>> 2262 config MIPS_VPE_APSP_API_MT
>> 2263 bool
>> 2264 default "y"
>> 2265 depends on MIPS_VPE_APSP_API
634 2266
635 If you don't know what to do here, s !! 2267 config MIPS_CPS
>> 2268 bool "MIPS Coherent Processing System support"
>> 2269 depends on SYS_SUPPORTS_MIPS_CPS
>> 2270 select MIPS_CM
>> 2271 select MIPS_CPS_PM if HOTPLUG_CPU
>> 2272 select SMP
>> 2273 select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
>> 2274 select SYNC_R4K if (CEVT_R4K || CSRC_R4K)
>> 2275 select SYS_SUPPORTS_HOTPLUG_CPU
>> 2276 select SYS_SUPPORTS_SCHED_SMT if CPU_MIPSR6
>> 2277 select SYS_SUPPORTS_SMP
>> 2278 select WEAK_ORDERING
>> 2279 select GENERIC_IRQ_MIGRATION if HOTPLUG_CPU
>> 2280 help
>> 2281 Select this if you wish to run an SMP kernel across multiple cores
>> 2282 within a MIPS Coherent Processing System. When this option is
>> 2283 enabled the kernel will probe for other cores and boot them with
>> 2284 no external assistance. It is safe to enable this when hardware
>> 2285 support is unavailable.
>> 2286
>> 2287 config MIPS_CPS_PM
>> 2288 depends on MIPS_CPS
>> 2289 bool
636 2290
637 config TOOLCHAIN_HAS_ZBB !! 2291 config MIPS_CM
638 bool 2292 bool
>> 2293 select MIPS_CPC
>> 2294
>> 2295 config MIPS_CPC
>> 2296 bool
>> 2297
>> 2298 config SB1_PASS_2_WORKAROUNDS
>> 2299 bool
>> 2300 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
639 default y 2301 default y
640 depends on !64BIT || $(cc-option,-mabi <<
641 depends on !32BIT || $(cc-option,-mabi <<
642 depends on LLD_VERSION >= 150000 || LD <<
643 depends on AS_HAS_OPTION_ARCH <<
644 <<
645 # This symbol indicates that the toolchain sup <<
646 # extensions, including Zvk*, Zvbb, and Zvbc. <<
647 # binutils added all except Zvkb, then added Z <<
648 config TOOLCHAIN_HAS_VECTOR_CRYPTO <<
649 def_bool $(as-instr, .option arch$(com <<
650 depends on AS_HAS_OPTION_ARCH <<
651 2302
652 config RISCV_ISA_ZBA !! 2303 config SB1_PASS_2_1_WORKAROUNDS
653 bool "Zba extension support for bit ma !! 2304 bool
>> 2305 depends on CPU_SB1 && CPU_SB1_PASS_2
654 default y 2306 default y
>> 2307
>> 2308 choice
>> 2309 prompt "SmartMIPS or microMIPS ASE support"
>> 2310
>> 2311 config CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS
>> 2312 bool "None"
655 help 2313 help
656 Add support for enabling optimisati !! 2314 Select this if you want neither microMIPS nor SmartMIPS support
657 extension is detected at boot. <<
658 2315
659 The Zba extension provides instruct !! 2316 config CPU_HAS_SMARTMIPS
660 of addresses that index into arrays !! 2317 depends on SYS_SUPPORTS_SMARTMIPS
>> 2318 bool "SmartMIPS"
>> 2319 help
>> 2320 SmartMIPS is a extension of the MIPS32 architecture aimed at
>> 2321 increased security at both hardware and software level for
>> 2322 smartcards. Enabling this option will allow proper use of the
>> 2323 SmartMIPS instructions by Linux applications. However a kernel with
>> 2324 this option will not work on a MIPS core without SmartMIPS core. If
>> 2325 you don't know you probably don't have SmartMIPS and should say N
>> 2326 here.
661 2327
662 If you don't know what to do here, !! 2328 config CPU_MICROMIPS
>> 2329 depends on 32BIT && SYS_SUPPORTS_MICROMIPS && !CPU_MIPSR6
>> 2330 bool "microMIPS"
>> 2331 help
>> 2332 When this option is enabled the kernel will be built using the
>> 2333 microMIPS ISA
663 2334
664 config RISCV_ISA_ZBB !! 2335 endchoice
665 bool "Zbb extension support for bit ma !! 2336
666 depends on TOOLCHAIN_HAS_ZBB !! 2337 config CPU_HAS_MSA
667 depends on RISCV_ALTERNATIVE !! 2338 bool "Support for the MIPS SIMD Architecture"
668 default y !! 2339 depends on CPU_SUPPORTS_MSA
>> 2340 depends on MIPS_FP_SUPPORT
>> 2341 depends on 64BIT || MIPS_O32_FP64_SUPPORT
>> 2342 help
>> 2343 MIPS SIMD Architecture (MSA) introduces 128 bit wide vector registers
>> 2344 and a set of SIMD instructions to operate on them. When this option
>> 2345 is enabled the kernel will support allocating & switching MSA
>> 2346 vector register contexts. If you know that your kernel will only be
>> 2347 running on CPUs which do not support MSA or that your userland will
>> 2348 not be making use of it then you may wish to say N here to reduce
>> 2349 the size & complexity of your kernel.
>> 2350
>> 2351 If unsure, say Y.
>> 2352
>> 2353 config CPU_HAS_WB
>> 2354 bool
>> 2355
>> 2356 config XKS01
>> 2357 bool
>> 2358
>> 2359 config CPU_HAS_DIEI
>> 2360 depends on !CPU_DIEI_BROKEN
>> 2361 bool
>> 2362
>> 2363 config CPU_DIEI_BROKEN
>> 2364 bool
>> 2365
>> 2366 config CPU_HAS_RIXI
>> 2367 bool
>> 2368
>> 2369 config CPU_NO_LOAD_STORE_LR
>> 2370 bool
669 help 2371 help
670 Adds support to dynamically detect !! 2372 CPU lacks support for unaligned load and store instructions:
671 extension (basic bit manipulation) !! 2373 LWL, LWR, SWL, SWR (Load/store word left/right).
>> 2374 LDL, LDR, SDL, SDR (Load/store doubleword left/right, for 64bit
>> 2375 systems).
672 2376
673 The Zbb extension provides instruct !! 2377 #
674 of bit-specific operations (count b !! 2378 # Vectored interrupt mode is an R2 feature
675 bitrotation, etc). !! 2379 #
>> 2380 config CPU_MIPSR2_IRQ_VI
>> 2381 bool
676 2382
677 If you don't know what to do here, !! 2383 #
>> 2384 # Extended interrupt mode is an R2 feature
>> 2385 #
>> 2386 config CPU_MIPSR2_IRQ_EI
>> 2387 bool
678 2388
679 config TOOLCHAIN_HAS_ZBC !! 2389 config CPU_HAS_SYNC
680 bool 2390 bool
>> 2391 depends on !CPU_R3000
681 default y 2392 default y
682 depends on !64BIT || $(cc-option,-mabi !! 2393
683 depends on !32BIT || $(cc-option,-mabi !! 2394 #
684 depends on LLD_VERSION >= 150000 || LD !! 2395 # CPU non-features
685 depends on AS_HAS_OPTION_ARCH !! 2396 #
686 !! 2397
687 config RISCV_ISA_ZBC !! 2398 # Work around the "daddi" and "daddiu" CPU errata:
688 bool "Zbc extension support for carry- !! 2399 #
689 depends on TOOLCHAIN_HAS_ZBC !! 2400 # - The `daddi' instruction fails to trap on overflow.
690 depends on MMU !! 2401 # "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
691 depends on RISCV_ALTERNATIVE !! 2402 # erratum #23
692 default y !! 2403 #
>> 2404 # - The `daddiu' instruction can produce an incorrect result.
>> 2405 # "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
>> 2406 # erratum #41
>> 2407 # "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum
>> 2408 # #15
>> 2409 # "MIPS R4400PC/SC Errata, Processor Revision 1.0", erratum #7
>> 2410 # "MIPS R4400MC Errata, Processor Revision 1.0", erratum #5
>> 2411 config CPU_DADDI_WORKAROUNDS
>> 2412 bool
>> 2413
>> 2414 # Work around certain R4000 CPU errata (as implemented by GCC):
>> 2415 #
>> 2416 # - A double-word or a variable shift may give an incorrect result
>> 2417 # if executed immediately after starting an integer division:
>> 2418 # "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
>> 2419 # erratum #28
>> 2420 # "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum
>> 2421 # #19
>> 2422 #
>> 2423 # - A double-word or a variable shift may give an incorrect result
>> 2424 # if executed while an integer multiplication is in progress:
>> 2425 # "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
>> 2426 # errata #16 & #28
>> 2427 #
>> 2428 # - An integer division may give an incorrect result if started in
>> 2429 # a delay slot of a taken branch or a jump:
>> 2430 # "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
>> 2431 # erratum #52
>> 2432 config CPU_R4000_WORKAROUNDS
>> 2433 bool
>> 2434 select CPU_R4400_WORKAROUNDS
>> 2435
>> 2436 # Work around certain R4400 CPU errata (as implemented by GCC):
>> 2437 #
>> 2438 # - A double-word or a variable shift may give an incorrect result
>> 2439 # if executed immediately after starting an integer division:
>> 2440 # "MIPS R4400MC Errata, Processor Revision 1.0", erratum #10
>> 2441 # "MIPS R4400MC Errata, Processor Revision 2.0 & 3.0", erratum #4
>> 2442 config CPU_R4400_WORKAROUNDS
>> 2443 bool
>> 2444
>> 2445 config CPU_R4X00_BUGS64
>> 2446 bool
>> 2447 default y if SYS_HAS_CPU_R4X00 && 64BIT && (TARGET_ISA_REV < 1)
>> 2448
>> 2449 config MIPS_ASID_SHIFT
>> 2450 int
>> 2451 default 6 if CPU_R3000
>> 2452 default 0
>> 2453
>> 2454 config MIPS_ASID_BITS
>> 2455 int
>> 2456 default 0 if MIPS_ASID_BITS_VARIABLE
>> 2457 default 6 if CPU_R3000
>> 2458 default 8
>> 2459
>> 2460 config MIPS_ASID_BITS_VARIABLE
>> 2461 bool
>> 2462
>> 2463 config MIPS_CRC_SUPPORT
>> 2464 bool
>> 2465
>> 2466 # R4600 erratum. Due to the lack of errata information the exact
>> 2467 # technical details aren't known. I've experimentally found that disabling
>> 2468 # interrupts during indexed I-cache flushes seems to be sufficient to deal
>> 2469 # with the issue.
>> 2470 config WAR_R4600_V1_INDEX_ICACHEOP
>> 2471 bool
>> 2472
>> 2473 # Pleasures of the R4600 V1.x. Cite from the IDT R4600 V1.7 errata:
>> 2474 #
>> 2475 # 18. The CACHE instructions Hit_Writeback_Invalidate_D, Hit_Writeback_D,
>> 2476 # Hit_Invalidate_D and Create_Dirty_Excl_D should only be
>> 2477 # executed if there is no other dcache activity. If the dcache is
>> 2478 # accessed for another instruction immediately preceding when these
>> 2479 # cache instructions are executing, it is possible that the dcache
>> 2480 # tag match outputs used by these cache instructions will be
>> 2481 # incorrect. These cache instructions should be preceded by at least
>> 2482 # four instructions that are not any kind of load or store
>> 2483 # instruction.
>> 2484 #
>> 2485 # This is not allowed: lw
>> 2486 # nop
>> 2487 # nop
>> 2488 # nop
>> 2489 # cache Hit_Writeback_Invalidate_D
>> 2490 #
>> 2491 # This is allowed: lw
>> 2492 # nop
>> 2493 # nop
>> 2494 # nop
>> 2495 # nop
>> 2496 # cache Hit_Writeback_Invalidate_D
>> 2497 config WAR_R4600_V1_HIT_CACHEOP
>> 2498 bool
>> 2499
>> 2500 # Writeback and invalidate the primary cache dcache before DMA.
>> 2501 #
>> 2502 # R4600 v2.0 bug: "The CACHE instructions Hit_Writeback_Inv_D,
>> 2503 # Hit_Writeback_D, Hit_Invalidate_D and Create_Dirty_Exclusive_D will only
>> 2504 # operate correctly if the internal data cache refill buffer is empty. These
>> 2505 # CACHE instructions should be separated from any potential data cache miss
>> 2506 # by a load instruction to an uncached address to empty the response buffer."
>> 2507 # (Revision 2.0 device errata from IDT available on https://www.idt.com/
>> 2508 # in .pdf format.)
>> 2509 config WAR_R4600_V2_HIT_CACHEOP
>> 2510 bool
>> 2511
>> 2512 # From TX49/H2 manual: "If the instruction (i.e. CACHE) is issued for
>> 2513 # the line which this instruction itself exists, the following
>> 2514 # operation is not guaranteed."
>> 2515 #
>> 2516 # Workaround: do two phase flushing for Index_Invalidate_I
>> 2517 config WAR_TX49XX_ICACHE_INDEX_INV
>> 2518 bool
>> 2519
>> 2520 # The RM7000 processors and the E9000 cores have a bug (though PMC-Sierra
>> 2521 # opposes it being called that) where invalid instructions in the same
>> 2522 # I-cache line worth of instructions being fetched may case spurious
>> 2523 # exceptions.
>> 2524 config WAR_ICACHE_REFILLS
>> 2525 bool
>> 2526
>> 2527 # On the R10000 up to version 2.6 (not sure about 2.7) there is a bug that
>> 2528 # may cause ll / sc and lld / scd sequences to execute non-atomically.
>> 2529 config WAR_R10000_LLSC
>> 2530 bool
>> 2531
>> 2532 # 34K core erratum: "Problems Executing the TLBR Instruction"
>> 2533 config WAR_MIPS34K_MISSED_ITLB
>> 2534 bool
>> 2535
>> 2536 #
>> 2537 # - Highmem only makes sense for the 32-bit kernel.
>> 2538 # - The current highmem code will only work properly on physically indexed
>> 2539 # caches such as R3000, SB1, R7000 or those that look like they're virtually
>> 2540 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
>> 2541 # moment we protect the user and offer the highmem option only on machines
>> 2542 # where it's known to be safe. This will not offer highmem on a few systems
>> 2543 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
>> 2544 # indexed CPUs but we're playing safe.
>> 2545 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
>> 2546 # know they might have memory configurations that could make use of highmem
>> 2547 # support.
>> 2548 #
>> 2549 config HIGHMEM
>> 2550 bool "High Memory Support"
>> 2551 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA
>> 2552 select KMAP_LOCAL
>> 2553
>> 2554 config CPU_SUPPORTS_HIGHMEM
>> 2555 bool
>> 2556
>> 2557 config SYS_SUPPORTS_HIGHMEM
>> 2558 bool
>> 2559
>> 2560 config SYS_SUPPORTS_SMARTMIPS
>> 2561 bool
>> 2562
>> 2563 config SYS_SUPPORTS_MICROMIPS
>> 2564 bool
>> 2565
>> 2566 config SYS_SUPPORTS_MIPS16
>> 2567 bool
693 help 2568 help
694 Adds support to dynamically detect !! 2569 This option must be set if a kernel might be executed on a MIPS16-
695 extension (carry-less multiplicatio !! 2570 enabled CPU even if MIPS16 is not actually being used. In other
>> 2571 words, it makes the kernel MIPS16-tolerant.
696 2572
697 The Zbc extension could accelerate !! 2573 config CPU_SUPPORTS_MSA
698 calculations. !! 2574 bool
699 2575
700 If you don't know what to do here, !! 2576 config ARCH_FLATMEM_ENABLE
>> 2577 def_bool y
>> 2578 depends on !NUMA && !CPU_LOONGSON2EF
701 2579
702 config RISCV_ISA_ZICBOM !! 2580 config ARCH_SPARSEMEM_ENABLE
703 bool "Zicbom extension support for non !! 2581 bool
704 depends on MMU !! 2582
705 depends on RISCV_ALTERNATIVE !! 2583 config NUMA
706 default y !! 2584 bool "NUMA Support"
707 select RISCV_DMA_NONCOHERENT !! 2585 depends on SYS_SUPPORTS_NUMA
708 select DMA_DIRECT_REMAP !! 2586 select SMP
>> 2587 select HAVE_SETUP_PER_CPU_AREA
>> 2588 select NEED_PER_CPU_EMBED_FIRST_CHUNK
709 help 2589 help
710 Adds support to dynamically detect !! 2590 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
711 extension (Cache Block Management O !! 2591 Access). This option improves performance on systems with more
712 usage. !! 2592 than two nodes; on two node systems it is generally better to
>> 2593 leave it disabled; on single node systems leave this option
>> 2594 disabled.
713 2595
714 The Zicbom extension can be used to !! 2596 config SYS_SUPPORTS_NUMA
715 non-coherent DMA support on devices !! 2597 bool
716 2598
717 If you don't know what to do here, !! 2599 config HAVE_ARCH_NODEDATA_EXTENSION
>> 2600 bool
718 2601
719 config RISCV_ISA_ZICBOZ !! 2602 config RELOCATABLE
720 bool "Zicboz extension support for fas !! 2603 bool "Relocatable kernel"
721 depends on RISCV_ALTERNATIVE !! 2604 depends on SYS_SUPPORTS_RELOCATABLE
722 default y !! 2605 depends on CPU_MIPS32_R2 || CPU_MIPS64_R2 || \
>> 2606 CPU_MIPS32_R5 || CPU_MIPS64_R5 || \
>> 2607 CPU_MIPS32_R6 || CPU_MIPS64_R6 || \
>> 2608 CPU_P5600 || CAVIUM_OCTEON_SOC || \
>> 2609 CPU_LOONGSON64
>> 2610 help
>> 2611 This builds a kernel image that retains relocation information
>> 2612 so it can be loaded someplace besides the default 1MB.
>> 2613 The relocations make the kernel binary about 15% larger,
>> 2614 but are discarded at runtime
>> 2615
>> 2616 config RELOCATION_TABLE_SIZE
>> 2617 hex "Relocation table size"
>> 2618 depends on RELOCATABLE
>> 2619 range 0x0 0x01000000
>> 2620 default "0x00200000" if CPU_LOONGSON64
>> 2621 default "0x00100000"
>> 2622 help
>> 2623 A table of relocation data will be appended to the kernel binary
>> 2624 and parsed at boot to fix up the relocated kernel.
>> 2625
>> 2626 This option allows the amount of space reserved for the table to be
>> 2627 adjusted, although the default of 1Mb should be ok in most cases.
>> 2628
>> 2629 The build will fail and a valid size suggested if this is too small.
>> 2630
>> 2631 If unsure, leave at the default value.
>> 2632
>> 2633 config RANDOMIZE_BASE
>> 2634 bool "Randomize the address of the kernel image"
>> 2635 depends on RELOCATABLE
723 help 2636 help
724 Enable the use of the Zicboz extens !! 2637 Randomizes the physical and virtual address at which the
725 when available. !! 2638 kernel image is loaded, as a security feature that
>> 2639 deters exploit attempts relying on knowledge of the location
>> 2640 of kernel internals.
726 2641
727 The Zicboz extension is used for fa !! 2642 Entropy is generated using any coprocessor 0 registers available.
728 2643
729 If you don't know what to do here, !! 2644 The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET.
730 2645
731 config TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI !! 2646 If unsure, say N.
732 def_bool y <<
733 # https://sourceware.org/git/?p=binuti <<
734 # https://gcc.gnu.org/git/?p=gcc.git;a <<
735 depends on AS_IS_GNU && AS_VERSION >= <<
736 help <<
737 Binutils-2.38 and GCC-12.1.0 bumped <<
738 20191213 version, which moves some i <<
739 the Zicsr and Zifencei extensions. T <<
740 Zicsr and Zifencei when binutils >= <<
741 and Zifencei are supported in binuti <<
742 To make life easier, and avoid forci <<
743 newer ISA spec to version 2.2, relax <<
744 For clang < 17 or GCC < 11.3.0, for <<
745 special treatment, this is dealt wit <<
746 2647
747 config TOOLCHAIN_NEEDS_OLD_ISA_SPEC !! 2648 config RANDOMIZE_BASE_MAX_OFFSET
748 def_bool y !! 2649 hex "Maximum kASLR offset" if EXPERT
749 depends on TOOLCHAIN_NEEDS_EXPLICIT_ZI !! 2650 depends on RANDOMIZE_BASE
750 # https://github.com/llvm/llvm-project !! 2651 range 0x0 0x40000000 if EVA || 64BIT
751 # https://gcc.gnu.org/git/?p=gcc.git;a !! 2652 range 0x0 0x08000000
752 depends on (CC_IS_CLANG && CLANG_VERSI !! 2653 default "0x01000000"
753 help !! 2654 help
754 Certain versions of clang and GCC do !! 2655 When kASLR is active, this provides the maximum offset that will
755 -march. This option causes an older !! 2656 be applied to the kernel image. It should be set according to the
756 versions of clang and GCC to be pass !! 2657 amount of physical RAM available in the target system minus
757 as passing zicsr and zifencei to -ma !! 2658 PHYSICAL_START and must be a power of 2.
>> 2659
>> 2660 This is limited by the size of KSEG0, 256Mb on 32-bit or 1Gb with
>> 2661 EVA or 64-bit. The default is 16Mb.
>> 2662
>> 2663 config NODES_SHIFT
>> 2664 int
>> 2665 default "6"
>> 2666 depends on NUMA
758 2667
759 config FPU !! 2668 config HW_PERF_EVENTS
760 bool "FPU support" !! 2669 bool "Enable hardware performance counter support for perf events"
>> 2670 depends on PERF_EVENTS && (CPU_MIPS32 || CPU_MIPS64 || CPU_R10000 || CPU_SB1 || CPU_CAVIUM_OCTEON || CPU_LOONGSON64)
761 default y 2671 default y
762 help 2672 help
763 Say N here if you want to disable al !! 2673 Enable hardware performance counter support for perf events. If
764 in the kernel. !! 2674 disabled, perf events will use software events only.
765 2675
766 If you don't know what to do here, s !! 2676 config DMI
767 !! 2677 bool "Enable DMI scanning"
768 config IRQ_STACKS !! 2678 depends on MACH_LOONGSON64
769 bool "Independent irq & softirq stacks !! 2679 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
770 default y 2680 default y
771 select HAVE_IRQ_EXIT_ON_IRQ_STACK <<
772 select HAVE_SOFTIRQ_ON_OWN_STACK <<
773 help 2681 help
774 Add independent irq & softirq stacks !! 2682 Enabled scanning of DMI to identify machine quirks. Say Y
775 overflows. We may save some memory f !! 2683 here unless you have verified that your setup is not
>> 2684 affected by entries in the DMI blacklist. Required by PNP
>> 2685 BIOS code.
776 2686
777 config THREAD_SIZE_ORDER !! 2687 config SMP
778 int "Kernel stack size (in power-of-tw !! 2688 bool "Multi-Processing support"
779 range 0 4 !! 2689 depends on SYS_SUPPORTS_SMP
780 default 1 if 32BIT <<
781 default 2 <<
782 help 2690 help
783 Specify the Pages of thread stack si !! 2691 This enables support for systems with more than one CPU. If you have
784 affects irq stack size, which is equ !! 2692 a system with only one CPU, say N. If you have a system with more
>> 2693 than one CPU, say Y.
>> 2694
>> 2695 If you say N here, the kernel will run on uni- and multiprocessor
>> 2696 machines, but will use only one CPU of a multiprocessor machine. If
>> 2697 you say Y here, the kernel will run on many, but not all,
>> 2698 uniprocessor machines. On a uniprocessor machine, the kernel
>> 2699 will run faster if you say N here.
785 2700
786 config RISCV_MISALIGNED !! 2701 People using multiprocessor machines who say Y here should also say
787 bool !! 2702 Y to "Enhanced Real Time Clock Support", below.
788 select SYSCTL_ARCH_UNALIGN_ALLOW !! 2703
>> 2704 See also the SMP-HOWTO available at
>> 2705 <https://www.tldp.org/docs.html#howto>.
>> 2706
>> 2707 If you don't know what to do here, say N.
>> 2708
>> 2709 config HOTPLUG_CPU
>> 2710 bool "Support for hot-pluggable CPUs"
>> 2711 depends on SMP && SYS_SUPPORTS_HOTPLUG_CPU
789 help 2712 help
790 Embed support for emulating misalign !! 2713 Say Y here to allow turning CPUs off and on. CPUs can be
>> 2714 controlled through /sys/devices/system/cpu.
>> 2715 (Note: power management support will enable this option
>> 2716 automatically on SMP systems. )
>> 2717 Say N if you want to disable CPU hotplug.
>> 2718
>> 2719 config SMP_UP
>> 2720 bool
>> 2721
>> 2722 config SYS_SUPPORTS_MIPS_CPS
>> 2723 bool
>> 2724
>> 2725 config SYS_SUPPORTS_SMP
>> 2726 bool
>> 2727
>> 2728 config NR_CPUS_DEFAULT_4
>> 2729 bool
>> 2730
>> 2731 config NR_CPUS_DEFAULT_8
>> 2732 bool
>> 2733
>> 2734 config NR_CPUS_DEFAULT_16
>> 2735 bool
>> 2736
>> 2737 config NR_CPUS_DEFAULT_32
>> 2738 bool
>> 2739
>> 2740 config NR_CPUS_DEFAULT_64
>> 2741 bool
>> 2742
>> 2743 config NR_CPUS
>> 2744 int "Maximum number of CPUs (2-256)"
>> 2745 range 2 256
>> 2746 depends on SMP
>> 2747 default "4" if NR_CPUS_DEFAULT_4
>> 2748 default "8" if NR_CPUS_DEFAULT_8
>> 2749 default "16" if NR_CPUS_DEFAULT_16
>> 2750 default "32" if NR_CPUS_DEFAULT_32
>> 2751 default "64" if NR_CPUS_DEFAULT_64
>> 2752 help
>> 2753 This allows you to specify the maximum number of CPUs which this
>> 2754 kernel will support. The maximum supported value is 32 for 32-bit
>> 2755 kernel and 64 for 64-bit kernels; the minimum value which makes
>> 2756 sense is 1 for Qemu (useful only for kernel debugging purposes)
>> 2757 and 2 for all others.
>> 2758
>> 2759 This is purely to save memory - each supported CPU adds
>> 2760 approximately eight kilobytes to the kernel image. For best
>> 2761 performance should round up your number of processors to the next
>> 2762 power of two.
>> 2763
>> 2764 config MIPS_PERF_SHARED_TC_COUNTERS
>> 2765 bool
>> 2766
>> 2767 config MIPS_NR_CPU_NR_MAP_1024
>> 2768 bool
>> 2769
>> 2770 config MIPS_NR_CPU_NR_MAP
>> 2771 int
>> 2772 depends on SMP
>> 2773 default 1024 if MIPS_NR_CPU_NR_MAP_1024
>> 2774 default NR_CPUS if !MIPS_NR_CPU_NR_MAP_1024
>> 2775
>> 2776 #
>> 2777 # Timer Interrupt Frequency Configuration
>> 2778 #
791 2779
792 choice 2780 choice
793 prompt "Unaligned Accesses Support" !! 2781 prompt "Timer frequency"
794 default RISCV_PROBE_UNALIGNED_ACCESS !! 2782 default HZ_250
795 help 2783 help
796 This determines the level of support !! 2784 Allows the configuration of the timer frequency.
797 information is used by the kernel to !! 2785
798 exposed to user space via the hwprob !! 2786 config HZ_24
799 probed at boot by default. !! 2787 bool "24 HZ" if SYS_SUPPORTS_24HZ || SYS_SUPPORTS_ARBIT_HZ
800 !! 2788
801 config RISCV_PROBE_UNALIGNED_ACCESS !! 2789 config HZ_48
802 bool "Probe for hardware unaligned acc !! 2790 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
803 select RISCV_MISALIGNED !! 2791
804 help !! 2792 config HZ_100
805 During boot, the kernel will run a s !! 2793 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
806 speed of unaligned accesses. This pr !! 2794
807 the speed of unaligned accesses on t !! 2795 config HZ_128
808 memory accesses trap into the kernel !! 2796 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
809 system, the kernel will emulate the !! 2797
810 UABI. !! 2798 config HZ_250
811 !! 2799 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
812 config RISCV_EMULATED_UNALIGNED_ACCESS !! 2800
813 bool "Emulate unaligned access where s !! 2801 config HZ_256
814 select RISCV_MISALIGNED !! 2802 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
815 help !! 2803
816 If unaligned memory accesses trap in !! 2804 config HZ_1000
817 supported by the system, the kernel !! 2805 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
818 accesses to preserve the UABI. When !! 2806
819 unaligned accesses, the unaligned ac !! 2807 config HZ_1024
820 !! 2808 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
821 config RISCV_SLOW_UNALIGNED_ACCESS <<
822 bool "Assume the system supports slow <<
823 depends on NONPORTABLE <<
824 help <<
825 Assume that the system supports slow <<
826 kernel and userspace programs may no <<
827 that do not support unaligned memory <<
828 <<
829 config RISCV_EFFICIENT_UNALIGNED_ACCESS <<
830 bool "Assume the system supports fast <<
831 depends on NONPORTABLE <<
832 select DCACHE_WORD_ACCESS if MMU <<
833 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
834 help <<
835 Assume that the system supports fast <<
836 enabled, this option improves the pe <<
837 systems. However, the kernel and use <<
838 slowly, or will not be able to run a <<
839 support efficient unaligned memory a <<
840 2809
841 endchoice 2810 endchoice
842 2811
843 source "arch/riscv/Kconfig.vendor" !! 2812 config SYS_SUPPORTS_24HZ
>> 2813 bool
844 2814
845 endmenu # "Platform type" !! 2815 config SYS_SUPPORTS_48HZ
>> 2816 bool
846 2817
847 menu "Kernel features" !! 2818 config SYS_SUPPORTS_100HZ
>> 2819 bool
848 2820
849 source "kernel/Kconfig.hz" !! 2821 config SYS_SUPPORTS_128HZ
>> 2822 bool
850 2823
851 config RISCV_SBI_V01 !! 2824 config SYS_SUPPORTS_250HZ
852 bool "SBI v0.1 support" !! 2825 bool
853 depends on RISCV_SBI <<
854 help <<
855 This config allows kernel to use SBI <<
856 deprecated in future once legacy M-m <<
857 2826
858 config RISCV_BOOT_SPINWAIT !! 2827 config SYS_SUPPORTS_256HZ
859 bool "Spinwait booting method" !! 2828 bool
860 depends on SMP <<
861 default y if RISCV_SBI_V01 || RISCV_M_ <<
862 help <<
863 This enables support for booting Lin <<
864 spinwait method, all cores randomly <<
865 gets chosen via lottery and all othe <<
866 variable. This method cannot support <<
867 scheme. It should be only enabled fo <<
868 on older firmware without SBI HSM ex <<
869 rely on ordered booting via SBI HSM <<
870 dynamically at runtime if the firmwa <<
871 <<
872 Since spinwait is incompatible with <<
873 NR_CPUS be large enough to contain t <<
874 hart to enter Linux. <<
875 2829
876 If unsure what to do here, say N. !! 2830 config SYS_SUPPORTS_1000HZ
>> 2831 bool
877 2832
878 config ARCH_SUPPORTS_KEXEC !! 2833 config SYS_SUPPORTS_1024HZ
879 def_bool y !! 2834 bool
880 2835
881 config ARCH_SELECTS_KEXEC !! 2836 config SYS_SUPPORTS_ARBIT_HZ
882 def_bool y !! 2837 bool
883 depends on KEXEC !! 2838 default y if !SYS_SUPPORTS_24HZ && \
884 select HOTPLUG_CPU if SMP !! 2839 !SYS_SUPPORTS_48HZ && \
>> 2840 !SYS_SUPPORTS_100HZ && \
>> 2841 !SYS_SUPPORTS_128HZ && \
>> 2842 !SYS_SUPPORTS_250HZ && \
>> 2843 !SYS_SUPPORTS_256HZ && \
>> 2844 !SYS_SUPPORTS_1000HZ && \
>> 2845 !SYS_SUPPORTS_1024HZ
>> 2846
>> 2847 config HZ
>> 2848 int
>> 2849 default 24 if HZ_24
>> 2850 default 48 if HZ_48
>> 2851 default 100 if HZ_100
>> 2852 default 128 if HZ_128
>> 2853 default 250 if HZ_250
>> 2854 default 256 if HZ_256
>> 2855 default 1000 if HZ_1000
>> 2856 default 1024 if HZ_1024
885 2857
886 config ARCH_SUPPORTS_KEXEC_FILE !! 2858 config SCHED_HRTICK
887 def_bool 64BIT !! 2859 def_bool HIGH_RES_TIMERS
888 2860
889 config ARCH_SELECTS_KEXEC_FILE !! 2861 config ARCH_SUPPORTS_KEXEC
890 def_bool y 2862 def_bool y
891 depends on KEXEC_FILE <<
892 select HAVE_IMA_KEXEC if IMA <<
893 select KEXEC_ELF <<
894 <<
895 config ARCH_SUPPORTS_KEXEC_PURGATORY <<
896 def_bool ARCH_SUPPORTS_KEXEC_FILE <<
897 2863
898 config ARCH_SUPPORTS_CRASH_DUMP 2864 config ARCH_SUPPORTS_CRASH_DUMP
899 def_bool y 2865 def_bool y
900 2866
901 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 2867 config PHYSICAL_START
902 def_bool CRASH_RESERVE !! 2868 hex "Physical address where the kernel is loaded"
>> 2869 default "0xffffffff84000000"
>> 2870 depends on CRASH_DUMP
>> 2871 help
>> 2872 This gives the CKSEG0 or KSEG0 address where the kernel is loaded.
>> 2873 If you plan to use kernel for capturing the crash dump change
>> 2874 this value to start of the reserved region (the "X" value as
>> 2875 specified in the "crashkernel=YM@XM" command line boot parameter
>> 2876 passed to the panic-ed kernel).
>> 2877
>> 2878 config MIPS_O32_FP64_SUPPORT
>> 2879 bool "Support for O32 binaries using 64-bit FP" if !CPU_MIPSR6
>> 2880 depends on 32BIT || MIPS32_O32
>> 2881 help
>> 2882 When this is enabled, the kernel will support use of 64-bit floating
>> 2883 point registers with binaries using the O32 ABI along with the
>> 2884 EF_MIPS_FP64 ELF header flag (typically built with -mfp64). On
>> 2885 32-bit MIPS systems this support is at the cost of increasing the
>> 2886 size and complexity of the compiled FPU emulator. Thus if you are
>> 2887 running a MIPS32 system and know that none of your userland binaries
>> 2888 will require 64-bit floating point, you may wish to reduce the size
>> 2889 of your kernel & potentially improve FP emulation performance by
>> 2890 saying N here.
>> 2891
>> 2892 Although binutils currently supports use of this flag the details
>> 2893 concerning its effect upon the O32 ABI in userland are still being
>> 2894 worked on. In order to avoid userland becoming dependent upon current
>> 2895 behaviour before the details have been finalised, this option should
>> 2896 be considered experimental and only enabled by those working upon
>> 2897 said details.
903 2898
904 config COMPAT !! 2899 If unsure, say N.
905 bool "Kernel support for 32-bit U-mode <<
906 default 64BIT <<
907 depends on 64BIT && MMU <<
908 help <<
909 This option enables support for a 32 <<
910 kernel at S-mode. riscv32-specific c <<
911 the user helper functions (vdso), si <<
912 ptrace interface are handled appropr <<
913 <<
914 If you want to execute 32-bit usersp <<
915 <<
916 config PARAVIRT <<
917 bool "Enable paravirtualization code" <<
918 depends on RISCV_SBI <<
919 help <<
920 This changes the kernel so it can mo <<
921 under a hypervisor, potentially impr <<
922 over full virtualization. <<
923 <<
924 config PARAVIRT_TIME_ACCOUNTING <<
925 bool "Paravirtual steal time accountin <<
926 depends on PARAVIRT <<
927 help <<
928 Select this option to enable fine gr <<
929 accounting. Time spent executing oth <<
930 the current vCPU is discounted from <<
931 that, there can be a small performan <<
932 2900
933 If in doubt, say N here. !! 2901 config USE_OF
>> 2902 bool
>> 2903 select OF
>> 2904 select OF_EARLY_FLATTREE
>> 2905 select IRQ_DOMAIN
934 2906
935 config RELOCATABLE !! 2907 config UHI_BOOT
936 bool "Build a relocatable kernel" !! 2908 bool
937 depends on MMU && 64BIT && !XIP_KERNEL <<
938 select MODULE_SECTIONS if MODULES <<
939 help <<
940 This builds a kernel as a Position I <<
941 which retains all relocation metadat <<
942 kernel binary at runtime to a differ <<
943 address it was linked at. <<
944 Since RISCV uses the RELA relocation <<
945 relocation pass at runtime even if t <<
946 same address it was linked at. <<
947 2909
948 If unsure, say N. !! 2910 config BUILTIN_DTB
>> 2911 bool
949 2912
950 config RANDOMIZE_BASE !! 2913 choice
951 bool "Randomize the address of the ker !! 2914 prompt "Kernel appended dtb support" if USE_OF
952 select RELOCATABLE !! 2915 default MIPS_NO_APPENDED_DTB
953 depends on MMU && 64BIT && !XIP_KERNEL <<
954 help <<
955 Randomizes the virtual address at wh <<
956 loaded, as a security feature that d <<
957 relying on knowledge of the location <<
958 <<
959 It is the bootloader's job to provid <<
960 random u64 value in /chosen/kaslr-se <<
961 <<
962 When booting via the UEFI stub, it w <<
963 EFI_RNG_PROTOCOL implementation (if <<
964 to the kernel proper. In addition, i <<
965 location of the kernel Image as well <<
966 <<
967 If unsure, say N. <<
968 <<
969 endmenu # "Kernel features" <<
970 <<
971 menu "Boot options" <<
972 <<
973 config CMDLINE <<
974 string "Built-in kernel command line" <<
975 help <<
976 For most platforms, the arguments fo <<
977 are provided at run-time, during boo <<
978 where either no arguments are being <<
979 arguments are insufficient or even i <<
980 2916
981 When that occurs, it is possible to !! 2917 config MIPS_NO_APPENDED_DTB
982 line here and choose how the kernel !! 2918 bool "None"
>> 2919 help
>> 2920 Do not enable appended dtb support.
>> 2921
>> 2922 config MIPS_ELF_APPENDED_DTB
>> 2923 bool "vmlinux"
>> 2924 help
>> 2925 With this option, the boot code will look for a device tree binary
>> 2926 DTB) included in the vmlinux ELF section .appended_dtb. By default
>> 2927 it is empty and the DTB can be appended using binutils command
>> 2928 objcopy:
>> 2929
>> 2930 objcopy --update-section .appended_dtb=<filename>.dtb vmlinux
>> 2931
>> 2932 This is meant as a backward compatibility convenience for those
>> 2933 systems with a bootloader that can't be upgraded to accommodate
>> 2934 the documented boot protocol using a device tree.
>> 2935
>> 2936 config MIPS_RAW_APPENDED_DTB
>> 2937 bool "vmlinux.bin or vmlinuz.bin"
>> 2938 help
>> 2939 With this option, the boot code will look for a device tree binary
>> 2940 DTB) appended to raw vmlinux.bin or vmlinuz.bin.
>> 2941 (e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
>> 2942
>> 2943 This is meant as a backward compatibility convenience for those
>> 2944 systems with a bootloader that can't be upgraded to accommodate
>> 2945 the documented boot protocol using a device tree.
>> 2946
>> 2947 Beware that there is very little in terms of protection against
>> 2948 this option being confused by leftover garbage in memory that might
>> 2949 look like a DTB header after a reboot if no actual DTB is appended
>> 2950 to vmlinux.bin. Do not leave this option active in a production kernel
>> 2951 if you don't intend to always append a DTB.
>> 2952 endchoice
983 2953
984 choice 2954 choice
985 prompt "Built-in command line usage" !! 2955 prompt "Kernel command line type" if !CMDLINE_OVERRIDE
986 depends on CMDLINE != "" !! 2956 default MIPS_CMDLINE_FROM_DTB if USE_OF && !ATH79 && !MACH_INGENIC && \
987 default CMDLINE_FALLBACK !! 2957 !MACH_LOONGSON64 && !MIPS_MALTA && \
988 help !! 2958 !CAVIUM_OCTEON_SOC
989 Choose how the kernel will handle th !! 2959 default MIPS_CMDLINE_FROM_BOOTLOADER
990 line. !! 2960
991 !! 2961 config MIPS_CMDLINE_FROM_DTB
992 config CMDLINE_FALLBACK !! 2962 depends on USE_OF
993 bool "Use bootloader kernel arguments !! 2963 bool "Dtb kernel arguments if available"
994 help !! 2964
995 Use the built-in command line as fal !! 2965 config MIPS_CMDLINE_DTB_EXTEND
996 during boot. This is the default beh !! 2966 depends on USE_OF
997 !! 2967 bool "Extend dtb kernel arguments with bootloader arguments"
998 config CMDLINE_EXTEND !! 2968
999 bool "Extend bootloader kernel argumen !! 2969 config MIPS_CMDLINE_FROM_BOOTLOADER
1000 help !! 2970 bool "Bootloader kernel arguments if available"
1001 The command-line arguments provided !! 2971
1002 appended to the built-in command li !! 2972 config MIPS_CMDLINE_BUILTIN_EXTEND
1003 cases where the provided arguments !! 2973 depends on CMDLINE_BOOL
1004 you don't want to or cannot modify !! 2974 bool "Extend builtin kernel arguments with bootloader arguments"
1005 <<
1006 config CMDLINE_FORCE <<
1007 bool "Always use the default kernel c <<
1008 help <<
1009 Always use the built-in command lin <<
1010 boot. This is useful in case you ne <<
1011 command line on systems where you d <<
1012 over it. <<
1013 <<
1014 endchoice 2975 endchoice
1015 2976
1016 config EFI_STUB !! 2977 endmenu
1017 bool <<
1018 2978
1019 config EFI !! 2979 config LOCKDEP_SUPPORT
1020 bool "UEFI runtime support" !! 2980 bool
1021 depends on OF && !XIP_KERNEL <<
1022 depends on MMU <<
1023 default y 2981 default y
1024 select ARCH_SUPPORTS_ACPI if 64BIT <<
1025 select EFI_GENERIC_STUB <<
1026 select EFI_PARAMS_FROM_FDT <<
1027 select EFI_RUNTIME_WRAPPERS <<
1028 select EFI_STUB <<
1029 select LIBFDT <<
1030 select RISCV_ISA_C <<
1031 select UCS2_STRING <<
1032 help <<
1033 This option provides support for ru <<
1034 by UEFI firmware (such as non-volat <<
1035 clock, and platform reset). A UEFI <<
1036 allow the kernel to be booted as an <<
1037 is only useful on systems that have <<
1038 2982
1039 config DMI !! 2983 config STACKTRACE_SUPPORT
1040 bool "Enable support for SMBIOS (DMI) !! 2984 bool
1041 depends on EFI <<
1042 default y 2985 default y
1043 help <<
1044 This enables SMBIOS/DMI feature for <<
1045 2986
1046 This option is only useful on syste !! 2987 config PGTABLE_LEVELS
1047 However, even with this option, the !! 2988 int
1048 continue to boot on existing non-UE !! 2989 default 4 if PAGE_SIZE_4KB && MIPS_VA_BITS_48
>> 2990 default 3 if 64BIT && (!PAGE_SIZE_64KB || MIPS_VA_BITS_48)
>> 2991 default 2
1049 2992
1050 config CC_HAVE_STACKPROTECTOR_TLS !! 2993 config MIPS_AUTO_PFN_OFFSET
1051 def_bool $(cc-option,-mstack-protecto !! 2994 bool
1052 2995
1053 config STACKPROTECTOR_PER_TASK !! 2996 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1054 def_bool y <<
1055 depends on !RANDSTRUCT <<
1056 depends on STACKPROTECTOR && CC_HAVE_ <<
1057 2997
1058 config PHYS_RAM_BASE_FIXED !! 2998 config PCI_DRIVERS_GENERIC
1059 bool "Explicitly specified physical R !! 2999 select PCI_DOMAINS_GENERIC if PCI
1060 depends on NONPORTABLE !! 3000 bool
1061 default n <<
1062 3001
1063 config PHYS_RAM_BASE !! 3002 config PCI_DRIVERS_LEGACY
1064 hex "Platform Physical RAM address" !! 3003 def_bool !PCI_DRIVERS_GENERIC
1065 depends on PHYS_RAM_BASE_FIXED !! 3004 select NO_GENERIC_PCI_IOPORT_MAP
1066 default "0x80000000" !! 3005 select PCI_DOMAINS if PCI
1067 help <<
1068 This is the physical address of RAM <<
1069 explicitly specified to run early r <<
1070 from flash to RAM. <<
1071 <<
1072 config XIP_KERNEL <<
1073 bool "Kernel Execute-In-Place from RO <<
1074 depends on MMU && SPARSEMEM && NONPOR <<
1075 # This prevents XIP from being enable <<
1076 # fail to build since XIP doesn't sup <<
1077 depends on !COMPILE_TEST <<
1078 select PHYS_RAM_BASE_FIXED <<
1079 help <<
1080 Execute-In-Place allows the kernel <<
1081 directly addressable by the CPU, su <<
1082 space since the text section of the <<
1083 to RAM. Read-write sections, such <<
1084 are still copied to RAM. The XIP k <<
1085 it has to run directly from flash, <<
1086 store it. The flash address used t <<
1087 and for storing it, is configuratio <<
1088 say Y here, you must know the prope <<
1089 store the kernel image depending on <<
1090 <<
1091 Also note that the make target beco <<
1092 "make zImage" or "make Image". The <<
1093 ROM memory will be arch/riscv/boot/ <<
1094 <<
1095 SPARSEMEM is required because the k <<
1096 flash resident are not backed by me <<
1097 a struct page on those regions will <<
1098 3006
1099 If unsure, say N. !! 3007 #
>> 3008 # ISA support is now enabled via select. Too many systems still have the one
>> 3009 # or other ISA chip on the board that users don't know about so don't expect
>> 3010 # users to choose the right thing ...
>> 3011 #
>> 3012 config ISA
>> 3013 bool
1100 3014
1101 config XIP_PHYS_ADDR !! 3015 config TC
1102 hex "XIP Kernel Physical Location" !! 3016 bool "TURBOchannel support"
1103 depends on XIP_KERNEL !! 3017 depends on MACH_DECSTATION
1104 default "0x21000000" !! 3018 help
1105 help !! 3019 TURBOchannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1106 This is the physical address in you !! 3020 processors. TURBOchannel programming specifications are available
1107 be linked for and stored to. This !! 3021 at:
1108 own flash usage. !! 3022 <ftp://ftp.hp.com/pub/alphaserver/archive/triadd/>
>> 3023 and:
>> 3024 <http://www.computer-refuge.org/classiccmp/ftp.digital.com/pub/DEC/TriAdd/>
>> 3025 Linux driver support status is documented at:
>> 3026 <http://www.linux-mips.org/wiki/DECstation>
1109 3027
1110 config RISCV_ISA_FALLBACK !! 3028 config MMU
1111 bool "Permit falling back to parsing !! 3029 bool
1112 default y 3030 default y
1113 help <<
1114 Parsing the "riscv,isa" devicetree <<
1115 replaced by a list of explicitly de <<
1116 with existing platforms, the kernel <<
1117 "riscv,isa" property if the replace <<
1118 <<
1119 Selecting N here will result in a k <<
1120 fallback, unless the commandline "r <<
1121 present. <<
1122 <<
1123 Please see the dt-binding, located <<
1124 Documentation/devicetree/bindings/r <<
1125 on the replacement properties, "ris <<
1126 "riscv,isa-extensions". <<
1127 3031
1128 config BUILTIN_DTB !! 3032 config ARCH_MMAP_RND_BITS_MIN
1129 bool "Built-in device tree" !! 3033 default 12 if 64BIT
1130 depends on OF && NONPORTABLE !! 3034 default 8
1131 help <<
1132 Build a device tree into the Linux <<
1133 This option should be selected if n <<
1134 If unsure, say N. <<
1135 3035
>> 3036 config ARCH_MMAP_RND_BITS_MAX
>> 3037 default 18 if 64BIT
>> 3038 default 15
1136 3039
1137 config BUILTIN_DTB_SOURCE !! 3040 config ARCH_MMAP_RND_COMPAT_BITS_MIN
1138 string "Built-in device tree source" !! 3041 default 8
1139 depends on BUILTIN_DTB <<
1140 help <<
1141 DTS file path (without suffix, rela <<
1142 for the DTS file that will be used <<
1143 kernel. <<
1144 3042
1145 endmenu # "Boot options" !! 3043 config ARCH_MMAP_RND_COMPAT_BITS_MAX
>> 3044 default 15
1146 3045
1147 config PORTABLE !! 3046 config I8253
>> 3047 bool
>> 3048 select CLKSRC_I8253
>> 3049 select CLKEVT_I8253
>> 3050 select MIPS_EXTERNAL_TIMER
>> 3051 endmenu
>> 3052
>> 3053 config TRAD_SIGNALS
>> 3054 bool
>> 3055
>> 3056 config MIPS32_COMPAT
1148 bool 3057 bool
1149 default !NONPORTABLE <<
1150 select EFI <<
1151 select MMU <<
1152 select OF <<
1153 3058
1154 config ARCH_PROC_KCORE_TEXT !! 3059 config COMPAT
>> 3060 bool
>> 3061
>> 3062 config MIPS32_O32
>> 3063 bool "Kernel support for o32 binaries"
>> 3064 depends on 64BIT
>> 3065 select ARCH_WANT_OLD_COMPAT_IPC
>> 3066 select COMPAT
>> 3067 select MIPS32_COMPAT
>> 3068 help
>> 3069 Select this option if you want to run o32 binaries. These are pure
>> 3070 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
>> 3071 existing binaries are in this format.
>> 3072
>> 3073 If unsure, say Y.
>> 3074
>> 3075 config MIPS32_N32
>> 3076 bool "Kernel support for n32 binaries"
>> 3077 depends on 64BIT
>> 3078 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
>> 3079 select COMPAT
>> 3080 select MIPS32_COMPAT
>> 3081 help
>> 3082 Select this option if you want to run n32 binaries. These are
>> 3083 64-bit binaries using 32-bit quantities for addressing and certain
>> 3084 data that would normally be 64-bit. They are used in special
>> 3085 cases.
>> 3086
>> 3087 If unsure, say N.
>> 3088
>> 3089 config CC_HAS_MNO_BRANCH_LIKELY
1155 def_bool y 3090 def_bool y
>> 3091 depends on $(cc-option,-mno-branch-likely)
1156 3092
1157 menu "Power management options" !! 3093 # https://github.com/llvm/llvm-project/issues/61045
>> 3094 config CC_HAS_BROKEN_INLINE_COMPAT_BRANCH
>> 3095 def_bool y if CC_IS_CLANG
1158 3096
1159 source "kernel/power/Kconfig" !! 3097 menu "Power management options"
1160 3098
1161 config ARCH_HIBERNATION_POSSIBLE 3099 config ARCH_HIBERNATION_POSSIBLE
1162 def_bool y 3100 def_bool y
1163 !! 3101 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
1164 config ARCH_HIBERNATION_HEADER <<
1165 def_bool HIBERNATION <<
1166 3102
1167 config ARCH_SUSPEND_POSSIBLE 3103 config ARCH_SUSPEND_POSSIBLE
1168 def_bool y 3104 def_bool y
>> 3105 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
1169 3106
1170 endmenu # "Power management options" !! 3107 source "kernel/power/Kconfig"
1171 3108
1172 menu "CPU Power Management" !! 3109 endmenu
1173 3110
1174 source "drivers/cpuidle/Kconfig" !! 3111 config MIPS_EXTERNAL_TIMER
>> 3112 bool
>> 3113
>> 3114 menu "CPU Power Management"
1175 3115
>> 3116 if CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER
1176 source "drivers/cpufreq/Kconfig" 3117 source "drivers/cpufreq/Kconfig"
>> 3118 endif # CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER
>> 3119
>> 3120 source "drivers/cpuidle/Kconfig"
1177 3121
1178 endmenu # "CPU Power Management" !! 3122 endmenu
1179 3123
1180 source "arch/riscv/kvm/Kconfig" !! 3124 source "arch/mips/kvm/Kconfig"
1181 3125
1182 source "drivers/acpi/Kconfig" !! 3126 source "arch/mips/vdso/Kconfig"
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