1# SPDX-License-Identifier: GPL-2.0 2config LOONGARCH 3 bool 4 default y 5 select ACPI 6 select ACPI_GENERIC_GSI if ACPI 7 select ACPI_MCFG if ACPI 8 select ACPI_PPTT if ACPI 9 select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI 10 select ARCH_BINFMT_ELF_STATE 11 select ARCH_DISABLE_KASAN_INLINE 12 select ARCH_ENABLE_MEMORY_HOTPLUG 13 select ARCH_ENABLE_MEMORY_HOTREMOVE 14 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE 15 select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI 16 select ARCH_HAS_CPU_FINALIZE_INIT 17 select ARCH_HAS_FORTIFY_SOURCE 18 select ARCH_HAS_KCOV 19 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS 20 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE 21 select ARCH_HAS_PTE_SPECIAL 22 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 23 select ARCH_INLINE_READ_LOCK if !PREEMPTION 24 select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION 25 select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION 26 select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION 27 select ARCH_INLINE_READ_UNLOCK if !PREEMPTION 28 select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION 29 select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION 30 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION 31 select ARCH_INLINE_WRITE_LOCK if !PREEMPTION 32 select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION 33 select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION 34 select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION 35 select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION 36 select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION 37 select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION 38 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION 39 select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION 40 select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION 41 select ARCH_INLINE_SPIN_LOCK if !PREEMPTION 42 select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION 43 select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION 44 select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION 45 select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION 46 select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION 47 select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION 48 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION 49 select ARCH_KEEP_MEMBLOCK 50 select ARCH_MIGHT_HAVE_PC_PARPORT 51 select ARCH_MIGHT_HAVE_PC_SERIO 52 select ARCH_SPARSEMEM_ENABLE 53 select ARCH_STACKWALK 54 select ARCH_SUPPORTS_ACPI 55 select ARCH_SUPPORTS_ATOMIC_RMW 56 select ARCH_SUPPORTS_HUGETLBFS 57 select ARCH_SUPPORTS_LTO_CLANG 58 select ARCH_SUPPORTS_LTO_CLANG_THIN 59 select ARCH_SUPPORTS_NUMA_BALANCING 60 select ARCH_USE_BUILTIN_BSWAP 61 select ARCH_USE_CMPXCHG_LOCKREF 62 select ARCH_USE_MEMTEST 63 select ARCH_USE_QUEUED_RWLOCKS 64 select ARCH_USE_QUEUED_SPINLOCKS 65 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT 66 select ARCH_WANT_LD_ORPHAN_WARN 67 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP 68 select ARCH_WANTS_NO_INSTR 69 select BUILDTIME_TABLE_SORT 70 select COMMON_CLK 71 select CPU_PM 72 select EFI 73 select GENERIC_CLOCKEVENTS 74 select GENERIC_CMOS_UPDATE 75 select GENERIC_CPU_AUTOPROBE 76 select GENERIC_ENTRY 77 select GENERIC_GETTIMEOFDAY 78 select GENERIC_IOREMAP if !ARCH_IOREMAP 79 select GENERIC_IRQ_MULTI_HANDLER 80 select GENERIC_IRQ_PROBE 81 select GENERIC_IRQ_SHOW 82 select GENERIC_LIB_ASHLDI3 83 select GENERIC_LIB_ASHRDI3 84 select GENERIC_LIB_CMPDI2 85 select GENERIC_LIB_LSHRDI3 86 select GENERIC_LIB_UCMPDI2 87 select GENERIC_LIB_DEVMEM_IS_ALLOWED 88 select GENERIC_PCI_IOMAP 89 select GENERIC_SCHED_CLOCK 90 select GENERIC_SMP_IDLE_THREAD 91 select GENERIC_TIME_VSYSCALL 92 select GENERIC_VDSO_TIME_NS 93 select GPIOLIB 94 select HAS_IOPORT 95 select HAVE_ARCH_AUDITSYSCALL 96 select HAVE_ARCH_JUMP_LABEL 97 select HAVE_ARCH_JUMP_LABEL_RELATIVE 98 select HAVE_ARCH_KASAN 99 select HAVE_ARCH_KFENCE 100 select HAVE_ARCH_KGDB if PERF_EVENTS 101 select HAVE_ARCH_MMAP_RND_BITS if MMU 102 select HAVE_ARCH_SECCOMP 103 select HAVE_ARCH_SECCOMP_FILTER 104 select HAVE_ARCH_TRACEHOOK 105 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 106 select HAVE_ASM_MODVERSIONS 107 select HAVE_CONTEXT_TRACKING_USER 108 select HAVE_C_RECORDMCOUNT 109 select HAVE_DEBUG_KMEMLEAK 110 select HAVE_DEBUG_STACKOVERFLOW 111 select HAVE_DMA_CONTIGUOUS 112 select HAVE_DYNAMIC_FTRACE 113 select HAVE_DYNAMIC_FTRACE_WITH_ARGS 114 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS 115 select HAVE_DYNAMIC_FTRACE_WITH_REGS 116 select HAVE_EBPF_JIT 117 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN 118 select HAVE_EXIT_THREAD 119 select HAVE_FAST_GUP 120 select HAVE_FTRACE_MCOUNT_RECORD 121 select HAVE_FUNCTION_ARG_ACCESS_API 122 select HAVE_FUNCTION_ERROR_INJECTION 123 select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER 124 select HAVE_FUNCTION_GRAPH_TRACER 125 select HAVE_FUNCTION_TRACER 126 select HAVE_GCC_PLUGINS 127 select HAVE_GENERIC_VDSO 128 select HAVE_HW_BREAKPOINT if PERF_EVENTS 129 select HAVE_IOREMAP_PROT 130 select HAVE_IRQ_EXIT_ON_IRQ_STACK 131 select HAVE_IRQ_TIME_ACCOUNTING 132 select HAVE_KPROBES 133 select HAVE_KPROBES_ON_FTRACE 134 select HAVE_KRETPROBES 135 select HAVE_MOD_ARCH_SPECIFIC 136 select HAVE_NMI 137 select HAVE_PCI 138 select HAVE_PERF_EVENTS 139 select HAVE_PERF_REGS 140 select HAVE_PERF_USER_STACK_DUMP 141 select HAVE_REGS_AND_STACK_ACCESS_API 142 select HAVE_RETHOOK 143 select HAVE_RSEQ 144 select HAVE_SAMPLE_FTRACE_DIRECT 145 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI 146 select HAVE_SETUP_PER_CPU_AREA if NUMA 147 select HAVE_STACKPROTECTOR 148 select HAVE_SYSCALL_TRACEPOINTS 149 select HAVE_TIF_NOHZ 150 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP 151 select IRQ_FORCED_THREADING 152 select IRQ_LOONGARCH_CPU 153 select LOCK_MM_AND_FIND_VMA 154 select MMU_GATHER_MERGE_VMAS if MMU 155 select MODULES_USE_ELF_RELA if MODULES 156 select NEED_PER_CPU_EMBED_FIRST_CHUNK 157 select NEED_PER_CPU_PAGE_FIRST_CHUNK 158 select OF 159 select OF_EARLY_FLATTREE 160 select PCI 161 select PCI_DOMAINS_GENERIC 162 select PCI_ECAM if ACPI 163 select PCI_LOONGSON 164 select PCI_MSI_ARCH_FALLBACKS 165 select PCI_QUIRKS 166 select PERF_USE_VMALLOC 167 select RTC_LIB 168 select SMP 169 select SPARSE_IRQ 170 select SYSCTL_ARCH_UNALIGN_ALLOW 171 select SYSCTL_ARCH_UNALIGN_NO_WARN 172 select SYSCTL_EXCEPTION_TRACE 173 select SWIOTLB 174 select TRACE_IRQFLAGS_SUPPORT 175 select USE_PERCPU_NUMA_NODE_ID 176 select USER_STACKTRACE_SUPPORT 177 select ZONE_DMA32 178 179config 32BIT 180 bool 181 182config 64BIT 183 def_bool y 184 185config GENERIC_BUG 186 def_bool y 187 depends on BUG 188 189config GENERIC_BUG_RELATIVE_POINTERS 190 def_bool y 191 depends on GENERIC_BUG 192 193config GENERIC_CALIBRATE_DELAY 194 def_bool y 195 196config GENERIC_CSUM 197 def_bool y 198 199config GENERIC_HWEIGHT 200 def_bool y 201 202config L1_CACHE_SHIFT 203 int 204 default "6" 205 206config LOCKDEP_SUPPORT 207 bool 208 default y 209 210config STACKTRACE_SUPPORT 211 bool 212 default y 213 214# MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the 215# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that 216# are shared between architectures, and specifically expecting the symbols. 217config MACH_LOONGSON32 218 def_bool 32BIT 219 220config MACH_LOONGSON64 221 def_bool 64BIT 222 223config FIX_EARLYCON_MEM 224 def_bool y 225 226config PAGE_SIZE_4KB 227 bool 228 229config PAGE_SIZE_16KB 230 bool 231 232config PAGE_SIZE_64KB 233 bool 234 235config PGTABLE_2LEVEL 236 bool 237 238config PGTABLE_3LEVEL 239 bool 240 241config PGTABLE_4LEVEL 242 bool 243 244config PGTABLE_LEVELS 245 int 246 default 2 if PGTABLE_2LEVEL 247 default 3 if PGTABLE_3LEVEL 248 default 4 if PGTABLE_4LEVEL 249 250config SCHED_OMIT_FRAME_POINTER 251 bool 252 default y 253 254config AS_HAS_EXPLICIT_RELOCS 255 def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x)) 256 257config AS_HAS_FCSR_CLASS 258 def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) 259 260config AS_HAS_LSX_EXTENSION 261 def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0) 262 263config AS_HAS_LASX_EXTENSION 264 def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0) 265 266config AS_HAS_LBT_EXTENSION 267 def_bool $(as-instr,movscr2gr \$a0$(comma)\$scr0) 268 269menu "Kernel type and options" 270 271source "kernel/Kconfig.hz" 272 273choice 274 prompt "Page Table Layout" 275 default 16KB_2LEVEL if 32BIT 276 default 16KB_3LEVEL if 64BIT 277 help 278 Allows choosing the page table layout, which is a combination 279 of page size and page table levels. The size of virtual memory 280 address space are determined by the page table layout. 281 282config 4KB_3LEVEL 283 bool "4KB with 3 levels" 284 select PAGE_SIZE_4KB 285 select PGTABLE_3LEVEL 286 help 287 This option selects 4KB page size with 3 level page tables, which 288 support a maximum of 39 bits of application virtual memory. 289 290config 4KB_4LEVEL 291 bool "4KB with 4 levels" 292 select PAGE_SIZE_4KB 293 select PGTABLE_4LEVEL 294 help 295 This option selects 4KB page size with 4 level page tables, which 296 support a maximum of 48 bits of application virtual memory. 297 298config 16KB_2LEVEL 299 bool "16KB with 2 levels" 300 select PAGE_SIZE_16KB 301 select PGTABLE_2LEVEL 302 help 303 This option selects 16KB page size with 2 level page tables, which 304 support a maximum of 36 bits of application virtual memory. 305 306config 16KB_3LEVEL 307 bool "16KB with 3 levels" 308 select PAGE_SIZE_16KB 309 select PGTABLE_3LEVEL 310 help 311 This option selects 16KB page size with 3 level page tables, which 312 support a maximum of 47 bits of application virtual memory. 313 314config 64KB_2LEVEL 315 bool "64KB with 2 levels" 316 select PAGE_SIZE_64KB 317 select PGTABLE_2LEVEL 318 help 319 This option selects 64KB page size with 2 level page tables, which 320 support a maximum of 42 bits of application virtual memory. 321 322config 64KB_3LEVEL 323 bool "64KB with 3 levels" 324 select PAGE_SIZE_64KB 325 select PGTABLE_3LEVEL 326 help 327 This option selects 64KB page size with 3 level page tables, which 328 support a maximum of 55 bits of application virtual memory. 329 330endchoice 331 332config CMDLINE 333 string "Built-in kernel command line" 334 help 335 For most platforms, the arguments for the kernel's command line 336 are provided at run-time, during boot. However, there are cases 337 where either no arguments are being provided or the provided 338 arguments are insufficient or even invalid. 339 340 When that occurs, it is possible to define a built-in command 341 line here and choose how the kernel should use it later on. 342 343choice 344 prompt "Kernel command line type" 345 default CMDLINE_BOOTLOADER 346 help 347 Choose how the kernel will handle the provided built-in command 348 line. 349 350config CMDLINE_BOOTLOADER 351 bool "Use bootloader kernel arguments if available" 352 help 353 Prefer the command-line passed by the boot loader if available. 354 Use the built-in command line as fallback in case we get nothing 355 during boot. This is the default behaviour. 356 357config CMDLINE_EXTEND 358 bool "Use built-in to extend bootloader kernel arguments" 359 help 360 The built-in command line will be appended to the command- 361 line arguments provided during boot. This is useful in 362 cases where the provided arguments are insufficient and 363 you don't want to or cannot modify them. 364 365config CMDLINE_FORCE 366 bool "Always use the built-in kernel command string" 367 help 368 Always use the built-in command line, even if we get one during 369 boot. This is useful in case you need to override the provided 370 command line on systems where you don't have or want control 371 over it. 372 373endchoice 374 375config DMI 376 bool "Enable DMI scanning" 377 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK 378 default y 379 help 380 This enables SMBIOS/DMI feature for systems, and scanning of 381 DMI to identify machine quirks. 382 383config EFI 384 bool "EFI runtime service support" 385 select UCS2_STRING 386 select EFI_RUNTIME_WRAPPERS 387 help 388 This enables the kernel to use EFI runtime services that are 389 available (such as the EFI variable services). 390 391config EFI_STUB 392 bool "EFI boot stub support" 393 default y 394 depends on EFI 395 select EFI_GENERIC_STUB 396 help 397 This kernel feature allows the kernel to be loaded directly by 398 EFI firmware without the use of a bootloader. 399 400config SCHED_SMT 401 bool "SMT scheduler support" 402 default y 403 help 404 Improves scheduler's performance when there are multiple 405 threads in one physical core. 406 407config SMP 408 bool "Multi-Processing support" 409 help 410 This enables support for systems with more than one CPU. If you have 411 a system with only one CPU, say N. If you have a system with more 412 than one CPU, say Y. 413 414 If you say N here, the kernel will run on uni- and multiprocessor 415 machines, but will use only one CPU of a multiprocessor machine. If 416 you say Y here, the kernel will run on many, but not all, 417 uniprocessor machines. On a uniprocessor machine, the kernel 418 will run faster if you say N here. 419 420 See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. 421 422 If you don't know what to do here, say N. 423 424config HOTPLUG_CPU 425 bool "Support for hot-pluggable CPUs" 426 depends on SMP 427 select GENERIC_IRQ_MIGRATION 428 help 429 Say Y here to allow turning CPUs off and on. CPUs can be 430 controlled through /sys/devices/system/cpu. 431 (Note: power management support will enable this option 432 automatically on SMP systems. ) 433 Say N if you want to disable CPU hotplug. 434 435config NR_CPUS 436 int "Maximum number of CPUs (2-256)" 437 range 2 256 438 depends on SMP 439 default "64" 440 help 441 This allows you to specify the maximum number of CPUs which this 442 kernel will support. 443 444config NUMA 445 bool "NUMA Support" 446 select SMP 447 select ACPI_NUMA if ACPI 448 help 449 Say Y to compile the kernel with NUMA (Non-Uniform Memory Access) 450 support. This option improves performance on systems with more 451 than one NUMA node; on single node systems it is generally better 452 to leave it disabled. 453 454config NODES_SHIFT 455 int 456 default "6" 457 depends on NUMA 458 459config ARCH_FORCE_MAX_ORDER 460 int "Maximum zone order" 461 default "13" if PAGE_SIZE_64KB 462 default "11" if PAGE_SIZE_16KB 463 default "10" 464 help 465 The kernel memory allocator divides physically contiguous memory 466 blocks into "zones", where each zone is a power of two number of 467 pages. This option selects the largest power of two that the kernel 468 keeps in the memory allocator. If you need to allocate very large 469 blocks of physically contiguous memory, then you may need to 470 increase this value. 471 472 The page size is not necessarily 4KB. Keep this in mind 473 when choosing a value for this option. 474 475config ARCH_IOREMAP 476 bool "Enable LoongArch DMW-based ioremap()" 477 help 478 We use generic TLB-based ioremap() by default since it has page 479 protection support. However, you can enable LoongArch DMW-based 480 ioremap() for better performance. 481 482config ARCH_WRITECOMBINE 483 bool "Enable WriteCombine (WUC) for ioremap()" 484 help 485 LoongArch maintains cache coherency in hardware, but when paired 486 with LS7A chipsets the WUC attribute (Weak-ordered UnCached, which 487 is similar to WriteCombine) is out of the scope of cache coherency 488 machanism for PCIe devices (this is a PCIe protocol violation, which 489 may be fixed in newer chipsets). 490 491 This means WUC can only used for write-only memory regions now, so 492 this option is disabled by default, making WUC silently fallback to 493 SUC for ioremap(). You can enable this option if the kernel is ensured 494 to run on hardware without this bug. 495 496 You can override this setting via writecombine=on/off boot parameter. 497 498config ARCH_STRICT_ALIGN 499 bool "Enable -mstrict-align to prevent unaligned accesses" if EXPERT 500 default y 501 help 502 Not all LoongArch cores support h/w unaligned access, we can use 503 -mstrict-align build parameter to prevent unaligned accesses. 504 505 CPUs with h/w unaligned access support: 506 Loongson-2K2000/2K3000/3A5000/3C5000/3D5000. 507 508 CPUs without h/w unaligned access support: 509 Loongson-2K500/2K1000. 510 511 This option is enabled by default to make the kernel be able to run 512 on all LoongArch systems. But you can disable it manually if you want 513 to run kernel only on systems with h/w unaligned access support in 514 order to optimise for performance. 515 516config CPU_HAS_FPU 517 bool 518 default y 519 520config CPU_HAS_LSX 521 bool "Support for the Loongson SIMD Extension" 522 depends on AS_HAS_LSX_EXTENSION 523 help 524 Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers 525 and a set of SIMD instructions to operate on them. When this option 526 is enabled the kernel will support allocating & switching LSX 527 vector register contexts. If you know that your kernel will only be 528 running on CPUs which do not support LSX or that your userland will 529 not be making use of it then you may wish to say N here to reduce 530 the size & complexity of your kernel. 531 532 If unsure, say Y. 533 534config CPU_HAS_LASX 535 bool "Support for the Loongson Advanced SIMD Extension" 536 depends on CPU_HAS_LSX 537 depends on AS_HAS_LASX_EXTENSION 538 help 539 Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector 540 registers and a set of SIMD instructions to operate on them. When this 541 option is enabled the kernel will support allocating & switching LASX 542 vector register contexts. If you know that your kernel will only be 543 running on CPUs which do not support LASX or that your userland will 544 not be making use of it then you may wish to say N here to reduce 545 the size & complexity of your kernel. 546 547 If unsure, say Y. 548 549config CPU_HAS_LBT 550 bool "Support for the Loongson Binary Translation Extension" 551 depends on AS_HAS_LBT_EXTENSION 552 help 553 Loongson Binary Translation (LBT) introduces 4 scratch registers (SCR0 554 to SCR3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). 555 Enabling this option allows the kernel to allocate and switch registers 556 specific to LBT. 557 558 If you want to use this feature, such as the Loongson Architecture 559 Translator (LAT), say Y. 560 561config CPU_HAS_PREFETCH 562 bool 563 default y 564 565config ARCH_SUPPORTS_KEXEC 566 def_bool y 567 568config ARCH_SUPPORTS_CRASH_DUMP 569 def_bool y 570 571config ARCH_SELECTS_CRASH_DUMP 572 def_bool y 573 depends on CRASH_DUMP 574 select RELOCATABLE 575 576config RELOCATABLE 577 bool "Relocatable kernel" 578 help 579 This builds the kernel as a Position Independent Executable (PIE), 580 which retains all relocation metadata required, so as to relocate 581 the kernel binary at runtime to a different virtual address from 582 its link address. 583 584config RANDOMIZE_BASE 585 bool "Randomize the address of the kernel (KASLR)" 586 depends on RELOCATABLE 587 help 588 Randomizes the physical and virtual address at which the 589 kernel image is loaded, as a security feature that 590 deters exploit attempts relying on knowledge of the location 591 of kernel internals. 592 593 The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET. 594 595 If unsure, say N. 596 597config RANDOMIZE_BASE_MAX_OFFSET 598 hex "Maximum KASLR offset" if EXPERT 599 depends on RANDOMIZE_BASE 600 range 0x0 0x10000000 601 default "0x01000000" 602 help 603 When KASLR is active, this provides the maximum offset that will 604 be applied to the kernel image. It should be set according to the 605 amount of physical RAM available in the target system. 606 607 This is limited by the size of the lower address memory, 256MB. 608 609endmenu 610 611config ARCH_SELECT_MEMORY_MODEL 612 def_bool y 613 614config ARCH_FLATMEM_ENABLE 615 def_bool y 616 depends on !NUMA 617 618config ARCH_SPARSEMEM_ENABLE 619 def_bool y 620 select SPARSEMEM_VMEMMAP_ENABLE 621 help 622 Say Y to support efficient handling of sparse physical memory, 623 for architectures which are either NUMA (Non-Uniform Memory Access) 624 or have huge holes in the physical address space for other reasons. 625 See <file:Documentation/mm/numa.rst> for more. 626 627config ARCH_MEMORY_PROBE 628 def_bool y 629 depends on MEMORY_HOTPLUG 630 631config MMU 632 bool 633 default y 634 635config ARCH_MMAP_RND_BITS_MIN 636 default 12 637 638config ARCH_MMAP_RND_BITS_MAX 639 default 18 640 641config ARCH_SUPPORTS_UPROBES 642 def_bool y 643 644config KASAN_SHADOW_OFFSET 645 hex 646 default 0x0 647 depends on KASAN 648 649menu "Power management options" 650 651config ARCH_SUSPEND_POSSIBLE 652 def_bool y 653 654config ARCH_HIBERNATION_POSSIBLE 655 def_bool y 656 657source "kernel/power/Kconfig" 658source "drivers/acpi/Kconfig" 659 660endmenu 661