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_ENABLE_MEMORY_HOTPLUG 12 select ARCH_ENABLE_MEMORY_HOTREMOVE 13 select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI 14 select ARCH_HAS_CPU_FINALIZE_INIT 15 select ARCH_HAS_FORTIFY_SOURCE 16 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS 17 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE 18 select ARCH_HAS_PTE_SPECIAL 19 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 20 select ARCH_INLINE_READ_LOCK if !PREEMPTION 21 select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION 22 select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION 23 select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION 24 select ARCH_INLINE_READ_UNLOCK if !PREEMPTION 25 select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION 26 select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION 27 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION 28 select ARCH_INLINE_WRITE_LOCK if !PREEMPTION 29 select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION 30 select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION 31 select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION 32 select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION 33 select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION 34 select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION 35 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION 36 select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION 37 select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION 38 select ARCH_INLINE_SPIN_LOCK if !PREEMPTION 39 select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION 40 select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION 41 select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION 42 select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION 43 select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION 44 select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION 45 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION 46 select ARCH_KEEP_MEMBLOCK 47 select ARCH_MIGHT_HAVE_PC_PARPORT 48 select ARCH_MIGHT_HAVE_PC_SERIO 49 select ARCH_SPARSEMEM_ENABLE 50 select ARCH_STACKWALK 51 select ARCH_SUPPORTS_ACPI 52 select ARCH_SUPPORTS_ATOMIC_RMW 53 select ARCH_SUPPORTS_HUGETLBFS 54 select ARCH_SUPPORTS_LTO_CLANG 55 select ARCH_SUPPORTS_LTO_CLANG_THIN 56 select ARCH_SUPPORTS_NUMA_BALANCING 57 select ARCH_USE_BUILTIN_BSWAP 58 select ARCH_USE_CMPXCHG_LOCKREF 59 select ARCH_USE_QUEUED_RWLOCKS 60 select ARCH_USE_QUEUED_SPINLOCKS 61 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT 62 select ARCH_WANT_LD_ORPHAN_WARN 63 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP 64 select ARCH_WANTS_NO_INSTR 65 select BUILDTIME_TABLE_SORT 66 select COMMON_CLK 67 select CPU_PM 68 select EFI 69 select GENERIC_CLOCKEVENTS 70 select GENERIC_CMOS_UPDATE 71 select GENERIC_CPU_AUTOPROBE 72 select GENERIC_ENTRY 73 select GENERIC_GETTIMEOFDAY 74 select GENERIC_IOREMAP if !ARCH_IOREMAP 75 select GENERIC_IRQ_MULTI_HANDLER 76 select GENERIC_IRQ_PROBE 77 select GENERIC_IRQ_SHOW 78 select GENERIC_LIB_ASHLDI3 79 select GENERIC_LIB_ASHRDI3 80 select GENERIC_LIB_CMPDI2 81 select GENERIC_LIB_LSHRDI3 82 select GENERIC_LIB_UCMPDI2 83 select GENERIC_LIB_DEVMEM_IS_ALLOWED 84 select GENERIC_PCI_IOMAP 85 select GENERIC_SCHED_CLOCK 86 select GENERIC_SMP_IDLE_THREAD 87 select GENERIC_TIME_VSYSCALL 88 select GENERIC_VDSO_TIME_NS 89 select GPIOLIB 90 select HAS_IOPORT 91 select HAVE_ARCH_AUDITSYSCALL 92 select HAVE_ARCH_JUMP_LABEL 93 select HAVE_ARCH_JUMP_LABEL_RELATIVE 94 select HAVE_ARCH_MMAP_RND_BITS if MMU 95 select HAVE_ARCH_SECCOMP_FILTER 96 select HAVE_ARCH_TRACEHOOK 97 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 98 select HAVE_ASM_MODVERSIONS 99 select HAVE_CONTEXT_TRACKING_USER 100 select HAVE_C_RECORDMCOUNT 101 select HAVE_DEBUG_KMEMLEAK 102 select HAVE_DEBUG_STACKOVERFLOW 103 select HAVE_DMA_CONTIGUOUS 104 select HAVE_DYNAMIC_FTRACE 105 select HAVE_DYNAMIC_FTRACE_WITH_ARGS 106 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS 107 select HAVE_DYNAMIC_FTRACE_WITH_REGS 108 select HAVE_EBPF_JIT 109 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN 110 select HAVE_EXIT_THREAD 111 select HAVE_FAST_GUP 112 select HAVE_FTRACE_MCOUNT_RECORD 113 select HAVE_FUNCTION_ARG_ACCESS_API 114 select HAVE_FUNCTION_ERROR_INJECTION 115 select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER 116 select HAVE_FUNCTION_GRAPH_TRACER 117 select HAVE_FUNCTION_TRACER 118 select HAVE_GENERIC_VDSO 119 select HAVE_HW_BREAKPOINT if PERF_EVENTS 120 select HAVE_IOREMAP_PROT 121 select HAVE_IRQ_EXIT_ON_IRQ_STACK 122 select HAVE_IRQ_TIME_ACCOUNTING 123 select HAVE_KPROBES 124 select HAVE_KPROBES_ON_FTRACE 125 select HAVE_KRETPROBES 126 select HAVE_MOD_ARCH_SPECIFIC 127 select HAVE_NMI 128 select HAVE_PCI 129 select HAVE_PERF_EVENTS 130 select HAVE_PERF_REGS 131 select HAVE_PERF_USER_STACK_DUMP 132 select HAVE_REGS_AND_STACK_ACCESS_API 133 select HAVE_RETHOOK 134 select HAVE_RSEQ 135 select HAVE_SAMPLE_FTRACE_DIRECT 136 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI 137 select HAVE_SETUP_PER_CPU_AREA if NUMA 138 select HAVE_STACKPROTECTOR 139 select HAVE_SYSCALL_TRACEPOINTS 140 select HAVE_TIF_NOHZ 141 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP 142 select IRQ_FORCED_THREADING 143 select IRQ_LOONGARCH_CPU 144 select LOCK_MM_AND_FIND_VMA 145 select MMU_GATHER_MERGE_VMAS if MMU 146 select MODULES_USE_ELF_RELA if MODULES 147 select NEED_PER_CPU_EMBED_FIRST_CHUNK 148 select NEED_PER_CPU_PAGE_FIRST_CHUNK 149 select OF 150 select OF_EARLY_FLATTREE 151 select PCI 152 select PCI_DOMAINS_GENERIC 153 select PCI_ECAM if ACPI 154 select PCI_LOONGSON 155 select PCI_MSI_ARCH_FALLBACKS 156 select PCI_QUIRKS 157 select PERF_USE_VMALLOC 158 select RTC_LIB 159 select SMP 160 select SPARSE_IRQ 161 select SYSCTL_ARCH_UNALIGN_ALLOW 162 select SYSCTL_ARCH_UNALIGN_NO_WARN 163 select SYSCTL_EXCEPTION_TRACE 164 select SWIOTLB 165 select TRACE_IRQFLAGS_SUPPORT 166 select USE_PERCPU_NUMA_NODE_ID 167 select USER_STACKTRACE_SUPPORT 168 select ZONE_DMA32 169 170config 32BIT 171 bool 172 173config 64BIT 174 def_bool y 175 176config GENERIC_BUG 177 def_bool y 178 depends on BUG 179 180config GENERIC_BUG_RELATIVE_POINTERS 181 def_bool y 182 depends on GENERIC_BUG 183 184config GENERIC_CALIBRATE_DELAY 185 def_bool y 186 187config GENERIC_CSUM 188 def_bool y 189 190config GENERIC_HWEIGHT 191 def_bool y 192 193config L1_CACHE_SHIFT 194 int 195 default "6" 196 197config LOCKDEP_SUPPORT 198 bool 199 default y 200 201config STACKTRACE_SUPPORT 202 bool 203 default y 204 205# MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the 206# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that 207# are shared between architectures, and specifically expecting the symbols. 208config MACH_LOONGSON32 209 def_bool 32BIT 210 211config MACH_LOONGSON64 212 def_bool 64BIT 213 214config FIX_EARLYCON_MEM 215 def_bool y 216 217config PAGE_SIZE_4KB 218 bool 219 220config PAGE_SIZE_16KB 221 bool 222 223config PAGE_SIZE_64KB 224 bool 225 226config PGTABLE_2LEVEL 227 bool 228 229config PGTABLE_3LEVEL 230 bool 231 232config PGTABLE_4LEVEL 233 bool 234 235config PGTABLE_LEVELS 236 int 237 default 2 if PGTABLE_2LEVEL 238 default 3 if PGTABLE_3LEVEL 239 default 4 if PGTABLE_4LEVEL 240 241config SCHED_OMIT_FRAME_POINTER 242 bool 243 default y 244 245config AS_HAS_EXPLICIT_RELOCS 246 def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x)) 247 248config AS_HAS_FCSR_CLASS 249 def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) 250 251config AS_HAS_LSX_EXTENSION 252 def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0) 253 254config AS_HAS_LASX_EXTENSION 255 def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0) 256 257menu "Kernel type and options" 258 259source "kernel/Kconfig.hz" 260 261choice 262 prompt "Page Table Layout" 263 default 16KB_2LEVEL if 32BIT 264 default 16KB_3LEVEL if 64BIT 265 help 266 Allows choosing the page table layout, which is a combination 267 of page size and page table levels. The size of virtual memory 268 address space are determined by the page table layout. 269 270config 4KB_3LEVEL 271 bool "4KB with 3 levels" 272 select PAGE_SIZE_4KB 273 select PGTABLE_3LEVEL 274 help 275 This option selects 4KB page size with 3 level page tables, which 276 support a maximum of 39 bits of application virtual memory. 277 278config 4KB_4LEVEL 279 bool "4KB with 4 levels" 280 select PAGE_SIZE_4KB 281 select PGTABLE_4LEVEL 282 help 283 This option selects 4KB page size with 4 level page tables, which 284 support a maximum of 48 bits of application virtual memory. 285 286config 16KB_2LEVEL 287 bool "16KB with 2 levels" 288 select PAGE_SIZE_16KB 289 select PGTABLE_2LEVEL 290 help 291 This option selects 16KB page size with 2 level page tables, which 292 support a maximum of 36 bits of application virtual memory. 293 294config 16KB_3LEVEL 295 bool "16KB with 3 levels" 296 select PAGE_SIZE_16KB 297 select PGTABLE_3LEVEL 298 help 299 This option selects 16KB page size with 3 level page tables, which 300 support a maximum of 47 bits of application virtual memory. 301 302config 64KB_2LEVEL 303 bool "64KB with 2 levels" 304 select PAGE_SIZE_64KB 305 select PGTABLE_2LEVEL 306 help 307 This option selects 64KB page size with 2 level page tables, which 308 support a maximum of 42 bits of application virtual memory. 309 310config 64KB_3LEVEL 311 bool "64KB with 3 levels" 312 select PAGE_SIZE_64KB 313 select PGTABLE_3LEVEL 314 help 315 This option selects 64KB page size with 3 level page tables, which 316 support a maximum of 55 bits of application virtual memory. 317 318endchoice 319 320config CMDLINE 321 string "Built-in kernel command line" 322 help 323 For most platforms, the arguments for the kernel's command line 324 are provided at run-time, during boot. However, there are cases 325 where either no arguments are being provided or the provided 326 arguments are insufficient or even invalid. 327 328 When that occurs, it is possible to define a built-in command 329 line here and choose how the kernel should use it later on. 330 331choice 332 prompt "Kernel command line type" 333 default CMDLINE_BOOTLOADER 334 help 335 Choose how the kernel will handle the provided built-in command 336 line. 337 338config CMDLINE_BOOTLOADER 339 bool "Use bootloader kernel arguments if available" 340 help 341 Prefer the command-line passed by the boot loader if available. 342 Use the built-in command line as fallback in case we get nothing 343 during boot. This is the default behaviour. 344 345config CMDLINE_EXTEND 346 bool "Use built-in to extend bootloader kernel arguments" 347 help 348 The command-line arguments provided during boot will be 349 appended to the built-in command line. This is useful in 350 cases where the provided arguments are insufficient and 351 you don't want to or cannot modify them. 352 353config CMDLINE_FORCE 354 bool "Always use the built-in kernel command string" 355 help 356 Always use the built-in command line, even if we get one during 357 boot. This is useful in case you need to override the provided 358 command line on systems where you don't have or want control 359 over it. 360 361endchoice 362 363config DMI 364 bool "Enable DMI scanning" 365 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK 366 default y 367 help 368 This enables SMBIOS/DMI feature for systems, and scanning of 369 DMI to identify machine quirks. 370 371config EFI 372 bool "EFI runtime service support" 373 select UCS2_STRING 374 select EFI_RUNTIME_WRAPPERS 375 help 376 This enables the kernel to use EFI runtime services that are 377 available (such as the EFI variable services). 378 379config EFI_STUB 380 bool "EFI boot stub support" 381 default y 382 depends on EFI 383 select EFI_GENERIC_STUB 384 help 385 This kernel feature allows the kernel to be loaded directly by 386 EFI firmware without the use of a bootloader. 387 388config SCHED_SMT 389 bool "SMT scheduler support" 390 default y 391 help 392 Improves scheduler's performance when there are multiple 393 threads in one physical core. 394 395config SMP 396 bool "Multi-Processing support" 397 help 398 This enables support for systems with more than one CPU. If you have 399 a system with only one CPU, say N. If you have a system with more 400 than one CPU, say Y. 401 402 If you say N here, the kernel will run on uni- and multiprocessor 403 machines, but will use only one CPU of a multiprocessor machine. If 404 you say Y here, the kernel will run on many, but not all, 405 uniprocessor machines. On a uniprocessor machine, the kernel 406 will run faster if you say N here. 407 408 See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. 409 410 If you don't know what to do here, say N. 411 412config HOTPLUG_CPU 413 bool "Support for hot-pluggable CPUs" 414 depends on SMP 415 select GENERIC_IRQ_MIGRATION 416 help 417 Say Y here to allow turning CPUs off and on. CPUs can be 418 controlled through /sys/devices/system/cpu. 419 (Note: power management support will enable this option 420 automatically on SMP systems. ) 421 Say N if you want to disable CPU hotplug. 422 423config NR_CPUS 424 int "Maximum number of CPUs (2-256)" 425 range 2 256 426 depends on SMP 427 default "64" 428 help 429 This allows you to specify the maximum number of CPUs which this 430 kernel will support. 431 432config NUMA 433 bool "NUMA Support" 434 select SMP 435 select ACPI_NUMA if ACPI 436 help 437 Say Y to compile the kernel with NUMA (Non-Uniform Memory Access) 438 support. This option improves performance on systems with more 439 than one NUMA node; on single node systems it is generally better 440 to leave it disabled. 441 442config NODES_SHIFT 443 int 444 default "6" 445 depends on NUMA 446 447config ARCH_FORCE_MAX_ORDER 448 int "Maximum zone order" 449 default "13" if PAGE_SIZE_64KB 450 default "11" if PAGE_SIZE_16KB 451 default "10" 452 help 453 The kernel memory allocator divides physically contiguous memory 454 blocks into "zones", where each zone is a power of two number of 455 pages. This option selects the largest power of two that the kernel 456 keeps in the memory allocator. If you need to allocate very large 457 blocks of physically contiguous memory, then you may need to 458 increase this value. 459 460 The page size is not necessarily 4KB. Keep this in mind 461 when choosing a value for this option. 462 463config ARCH_IOREMAP 464 bool "Enable LoongArch DMW-based ioremap()" 465 help 466 We use generic TLB-based ioremap() by default since it has page 467 protection support. However, you can enable LoongArch DMW-based 468 ioremap() for better performance. 469 470config ARCH_WRITECOMBINE 471 bool "Enable WriteCombine (WUC) for ioremap()" 472 help 473 LoongArch maintains cache coherency in hardware, but when paired 474 with LS7A chipsets the WUC attribute (Weak-ordered UnCached, which 475 is similar to WriteCombine) is out of the scope of cache coherency 476 machanism for PCIe devices (this is a PCIe protocol violation, which 477 may be fixed in newer chipsets). 478 479 This means WUC can only used for write-only memory regions now, so 480 this option is disabled by default, making WUC silently fallback to 481 SUC for ioremap(). You can enable this option if the kernel is ensured 482 to run on hardware without this bug. 483 484 You can override this setting via writecombine=on/off boot parameter. 485 486config ARCH_STRICT_ALIGN 487 bool "Enable -mstrict-align to prevent unaligned accesses" if EXPERT 488 default y 489 help 490 Not all LoongArch cores support h/w unaligned access, we can use 491 -mstrict-align build parameter to prevent unaligned accesses. 492 493 CPUs with h/w unaligned access support: 494 Loongson-2K2000/2K3000/3A5000/3C5000/3D5000. 495 496 CPUs without h/w unaligned access support: 497 Loongson-2K500/2K1000. 498 499 This option is enabled by default to make the kernel be able to run 500 on all LoongArch systems. But you can disable it manually if you want 501 to run kernel only on systems with h/w unaligned access support in 502 order to optimise for performance. 503 504config CPU_HAS_FPU 505 bool 506 default y 507 508config CPU_HAS_LSX 509 bool "Support for the Loongson SIMD Extension" 510 depends on AS_HAS_LSX_EXTENSION 511 help 512 Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers 513 and a set of SIMD instructions to operate on them. When this option 514 is enabled the kernel will support allocating & switching LSX 515 vector register contexts. If you know that your kernel will only be 516 running on CPUs which do not support LSX or that your userland will 517 not be making use of it then you may wish to say N here to reduce 518 the size & complexity of your kernel. 519 520 If unsure, say Y. 521 522config CPU_HAS_LASX 523 bool "Support for the Loongson Advanced SIMD Extension" 524 depends on CPU_HAS_LSX 525 depends on AS_HAS_LASX_EXTENSION 526 help 527 Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector 528 registers and a set of SIMD instructions to operate on them. When this 529 option is enabled the kernel will support allocating & switching LASX 530 vector register contexts. If you know that your kernel will only be 531 running on CPUs which do not support LASX or that your userland will 532 not be making use of it then you may wish to say N here to reduce 533 the size & complexity of your kernel. 534 535 If unsure, say Y. 536 537config CPU_HAS_PREFETCH 538 bool 539 default y 540 541config KEXEC 542 bool "Kexec system call" 543 select KEXEC_CORE 544 help 545 kexec is a system call that implements the ability to shutdown your 546 current kernel, and to start another kernel. It is like a reboot 547 but it is independent of the system firmware. And like a reboot 548 you can start any kernel with it, not just Linux. 549 550 The name comes from the similarity to the exec system call. 551 552config CRASH_DUMP 553 bool "Build kdump crash kernel" 554 select RELOCATABLE 555 help 556 Generate crash dump after being started by kexec. This should 557 be normally only set in special crash dump kernels which are 558 loaded in the main kernel with kexec-tools into a specially 559 reserved region and then later executed after a crash by 560 kdump/kexec. 561 562 For more details see Documentation/admin-guide/kdump/kdump.rst 563 564config RELOCATABLE 565 bool "Relocatable kernel" 566 help 567 This builds the kernel as a Position Independent Executable (PIE), 568 which retains all relocation metadata required, so as to relocate 569 the kernel binary at runtime to a different virtual address from 570 its link address. 571 572config RANDOMIZE_BASE 573 bool "Randomize the address of the kernel (KASLR)" 574 depends on RELOCATABLE 575 help 576 Randomizes the physical and virtual address at which the 577 kernel image is loaded, as a security feature that 578 deters exploit attempts relying on knowledge of the location 579 of kernel internals. 580 581 The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET. 582 583 If unsure, say N. 584 585config RANDOMIZE_BASE_MAX_OFFSET 586 hex "Maximum KASLR offset" if EXPERT 587 depends on RANDOMIZE_BASE 588 range 0x0 0x10000000 589 default "0x01000000" 590 help 591 When KASLR is active, this provides the maximum offset that will 592 be applied to the kernel image. It should be set according to the 593 amount of physical RAM available in the target system. 594 595 This is limited by the size of the lower address memory, 256MB. 596 597config SECCOMP 598 bool "Enable seccomp to safely compute untrusted bytecode" 599 depends on PROC_FS 600 default y 601 help 602 This kernel feature is useful for number crunching applications 603 that may need to compute untrusted bytecode during their 604 execution. By using pipes or other transports made available to 605 the process as file descriptors supporting the read/write 606 syscalls, it's possible to isolate those applications in 607 their own address space using seccomp. Once seccomp is 608 enabled via /proc/<pid>/seccomp, it cannot be disabled 609 and the task is only allowed to execute a few safe syscalls 610 defined by each seccomp mode. 611 612 If unsure, say Y. Only embedded should say N here. 613 614endmenu 615 616config ARCH_SELECT_MEMORY_MODEL 617 def_bool y 618 619config ARCH_FLATMEM_ENABLE 620 def_bool y 621 depends on !NUMA 622 623config ARCH_SPARSEMEM_ENABLE 624 def_bool y 625 select SPARSEMEM_VMEMMAP_ENABLE 626 help 627 Say Y to support efficient handling of sparse physical memory, 628 for architectures which are either NUMA (Non-Uniform Memory Access) 629 or have huge holes in the physical address space for other reasons. 630 See <file:Documentation/mm/numa.rst> for more. 631 632config ARCH_ENABLE_THP_MIGRATION 633 def_bool y 634 depends on TRANSPARENT_HUGEPAGE 635 636config ARCH_MEMORY_PROBE 637 def_bool y 638 depends on MEMORY_HOTPLUG 639 640config MMU 641 bool 642 default y 643 644config ARCH_MMAP_RND_BITS_MIN 645 default 12 646 647config ARCH_MMAP_RND_BITS_MAX 648 default 18 649 650config ARCH_SUPPORTS_UPROBES 651 def_bool y 652 653menu "Power management options" 654 655config ARCH_SUSPEND_POSSIBLE 656 def_bool y 657 658config ARCH_HIBERNATION_POSSIBLE 659 def_bool y 660 661source "kernel/power/Kconfig" 662source "drivers/acpi/Kconfig" 663 664endmenu 665 666source "drivers/firmware/Kconfig" 667