cBPF-JIT

HAVE_CBPF_JIT

arch supports cBPF JIT optimizations

• ok: mips, powerpc sparc

• TODO: alpha, arc, arm arm64, csky, hexagon loongarch, m68k, microblaze nios2, openrisc, parisc riscv, s390, sh, um, x86 xtensa

eBPF-JIT

HAVE_EBPF_JIT

arch supports eBPF JIT optimizations

• ok: arc, arm, arm64 loongarch, mips, parisc powerpc, riscv, s390, sparc x86

• TODO: alpha, csky hexagon, m68k, microblaze nios2, openrisc, sh, um xtensa

generic-idle-thread

GENERIC_SMP_IDLE_THREAD

arch makes use of the generic SMP idle thread facility

• ok: alpha, arc, arm arm64, csky, hexagon loongarch, mips, openrisc parisc, powerpc, riscv s390, sh, sparc, um, x86 xtensa

• TODO: m68k, microblaze nios2

jump-labels

HAVE_ARCH_JUMP_LABEL

arch supports live patched, high efficiency branches

• ok: arc, arm, arm64 csky, loongarch, mips openrisc, parisc, powerpc riscv, s390, sparc, x86 xtensa

• TODO: alpha, hexagon m68k, microblaze, nios2, sh um

mseal-system-mappings

ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS

arch supports mseal system mappings

• ok: arm64, loongarch riscv, s390, x86

• TODO: alpha, mips parisc, powerpc, sparc, um

• N/A: arc, arm, csky hexagon, m68k, microblaze nios2, openrisc, sh, xtensa

thread-info-in-task

THREAD_INFO_IN_TASK

arch makes use of the core kernel facility to embed thread_info in task_struct

• ok: arm, arm64 loongarch, parisc, powerpc riscv, s390, um, x86

• TODO: alpha, arc, csky hexagon, m68k, microblaze mips, nios2, openrisc, sh sparc, xtensa

tracehook

HAVE_ARCH_TRACEHOOK

arch supports tracehook (ptrace) register handling APIs

• ok: alpha, arc, arm arm64, csky, hexagon loongarch, mips, nios2 openrisc, parisc, powerpc riscv, s390, sh, sparc, um x86, xtensa

• TODO: m68k, microblaze

debug-vm-pgtable

ARCH_HAS_DEBUG_VM_PGTABLE

arch supports pgtable tests for semantics compliance

• ok: alpha, arc, arm64 loongarch, parisc, powerpc riscv, s390, x86, xtensa

• TODO: arm, csky hexagon, m68k, microblaze mips, nios2, openrisc, sh sparc, um

gcov-profile-all

ARCH_HAS_GCOV_PROFILE_ALL

arch supports whole-kernel GCOV code coverage profiling

• ok: alpha, arm, arm64 csky, microblaze, mips powerpc, riscv, s390, sh um, x86, xtensa

• TODO: arc, hexagon loongarch, m68k, nios2 openrisc, parisc, sparc

KASAN

HAVE_ARCH_KASAN

arch supports the KASAN runtime memory checker

• ok: arm, arm64 loongarch, powerpc, riscv s390, um, x86, xtensa

• TODO: alpha, arc, csky hexagon, m68k, microblaze mips, nios2, openrisc parisc, sh, sparc

kcov

ARCH_HAS_KCOV

arch supports kcov for coverage-guided fuzzing

• ok: arm, arm64 loongarch, mips, powerpc riscv, s390, um, x86 xtensa

• TODO: alpha, arc, csky hexagon, m68k, microblaze nios2, openrisc, parisc, sh sparc

kgdb

HAVE_ARCH_KGDB

arch supports the kGDB kernel debugger

• ok: arc, arm, arm64 hexagon, loongarch microblaze, mips, nios2 parisc, powerpc, riscv, sh sparc, x86

• TODO: alpha, csky, m68k openrisc, s390, um, xtensa

kmemleak

HAVE_DEBUG_KMEMLEAK

arch supports the kernel memory leak detector

• ok: alpha, arc, arm arm64, csky, loongarch microblaze, mips, powerpc riscv, s390, sh, sparc, um x86, xtensa

• TODO: hexagon, m68k nios2, openrisc, parisc

kprobes

HAVE_KPROBES

arch supports live patched kernel probe

• ok: arc, arm, arm64 csky, loongarch, mips parisc, powerpc, riscv s390, sh, sparc, x86

• TODO: alpha, hexagon m68k, microblaze, nios2 openrisc, um, xtensa

kprobes-on-ftrace

HAVE_KPROBES_ON_FTRACE

arch supports combined kprobes and ftrace live patching

• ok: csky, loongarch parisc, powerpc, s390, x86

• TODO: alpha, arc, arm arm64, hexagon, m68k microblaze, mips, nios2 openrisc, riscv, sh, sparc um, xtensa

kretprobes

HAVE_KRETPROBES

arch supports kernel function-return probes

• ok: arc, arm, arm64 csky, loongarch, mips parisc, powerpc, riscv s390, sh, sparc, x86

• TODO: alpha, hexagon m68k, microblaze, nios2 openrisc, um, xtensa

optprobes

HAVE_OPTPROBES

arch supports live patched optprobes

• ok: arm, powerpc, x86

• TODO: alpha, arc, arm64 csky, hexagon, loongarch m68k, microblaze, mips nios2, openrisc, parisc riscv, s390, sh, sparc, um xtensa

stackprotector

HAVE_STACKPROTECTOR

arch supports compiler driven stack overflow protection

• ok: arm, arm64, csky loongarch, mips, powerpc riscv, s390, sh, x86 xtensa

• TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc sparc, um

uprobes

ARCH_SUPPORTS_UPROBES

arch supports live patched user probes

• ok: arm, arm64, csky loongarch, mips, powerpc riscv, s390, sparc, x86

• TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc, sh um, xtensa

user-ret-profiler

HAVE_USER_RETURN_NOTIFIER

arch supports user-space return from system call profiler

• ok: x86

• TODO: alpha, arc, arm arm64, csky, hexagon loongarch, m68k, microblaze mips, nios2, openrisc parisc, powerpc, riscv s390, sh, sparc, um, xtensa

dma-contiguous

HAVE_DMA_CONTIGUOUS

arch supports the DMA CMA (continuous memory allocator)

• ok: arm, arm64, csky loongarch, microblaze, mips riscv, s390, x86, xtensa

• TODO: alpha, arc hexagon, m68k, nios2 openrisc, parisc, powerpc sh, sparc, um

cmpxchg-local

HAVE_CMPXCHG_LOCAL

arch supports the this_cpu_cmpxchg() API

• ok: arm64, loongarch s390, x86

• TODO: alpha, arc, arm csky, hexagon, m68k microblaze, mips, nios2 openrisc, parisc, powerpc riscv, sh, sparc, um xtensa

lockdep

LOCKDEP_SUPPORT

arch supports the runtime locking correctness debug facility

• ok: alpha, arc, arm arm64, csky, hexagon loongarch, microblaze, mips openrisc, parisc, powerpc riscv, s390, sh, sparc, um x86, xtensa

• TODO: m68k, nios2

queued-rwlocks

ARCH_USE_QUEUED_RWLOCKS

arch supports queued rwlocks

• ok: arm64, csky loongarch, mips, openrisc powerpc, riscv, sparc, x86 xtensa

• TODO: alpha, arc, arm hexagon, m68k, microblaze nios2, parisc, s390, sh, um

queued-spinlocks

ARCH_USE_QUEUED_SPINLOCKS

arch supports queued spinlocks

• ok: arm64, csky loongarch, mips, openrisc powerpc, riscv, sparc, x86 xtensa

• TODO: alpha, arc, arm hexagon, m68k, microblaze nios2, parisc, s390, sh, um

kprobes-event

HAVE_REGS_AND_STACK_ACCESS_API

arch supports kprobes with perf events

• ok: arc, arm, arm64 csky, hexagon, loongarch mips, openrisc, parisc powerpc, riscv, s390, sh sparc, x86

• TODO: alpha, m68k microblaze, nios2, um xtensa

perf-regs

HAVE_PERF_REGS

arch supports perf events register access

• ok: alpha, arm, arm64 csky, loongarch, mips parisc, powerpc, riscv s390, x86

• TODO: arc, hexagon m68k, microblaze, nios2 openrisc, sh, sparc, um xtensa

perf-stackdump

HAVE_PERF_USER_STACK_DUMP

arch supports perf events stack dumps

• ok: alpha, arm, arm64 csky, loongarch, mips parisc, powerpc, riscv s390, x86

• TODO: arc, hexagon m68k, microblaze, nios2 openrisc, sh, sparc, um xtensa

membarrier-sync-core

ARCH_HAS_MEMBARRIER_SYNC_CORE

arch supports core serializing membarrier

• ok: arm, arm64, powerpc riscv, s390, x86

• TODO: alpha, arc, csky hexagon, loongarch, m68k microblaze, mips, nios2 openrisc, parisc, sh, sparc um, xtensa

numa-balancing

ARCH_SUPPORTS_NUMA_BALANCING

arch supports NUMA balancing

• ok: arm64, loongarch powerpc, riscv, s390, x86

• TODO: alpha, mips sparc

• Not compatible: arc arm, csky, hexagon, m68k microblaze, nios2, openrisc parisc, sh, um, xtensa

seccomp-filter

HAVE_ARCH_SECCOMP_FILTER

arch supports seccomp filters

• ok: alpha, arm, arm64 csky, loongarch, m68k, mips parisc, powerpc, riscv s390, sh, um, x86, xtensa

• TODO: arc, hexagon microblaze, nios2, openrisc sparc

arch-tick-broadcast

ARCH_HAS_TICK_BROADCAST

arch provides tick_broadcast()

• ok: arm, arm64 loongarch, mips, powerpc riscv, sh

• TODO: alpha, arc, csky hexagon, m68k, microblaze nios2, openrisc, parisc s390, sparc, um, x86 xtensa

clockevents

!LEGACY_TIMER_TICK

arch support generic clock events

• ok: alpha, arc, arm64 csky, hexagon, loongarch microblaze, mips, nios2 openrisc, parisc, powerpc riscv, s390, sh, sparc, um x86, xtensa

• TODO: arm, m68k

irq-time-acct

HAVE_IRQ_TIME_ACCOUNTING

arch supports precise IRQ time accounting

• ok: arm, arm64 loongarch, mips, powerpc riscv, x86, xtensa

• TODO: arc, csky hexagon, m68k, microblaze nios2, openrisc, sh, um

• Not compatible: alpha parisc, s390, sparc

user-context-tracking

HAVE_CONTEXT_TRACKING_USER

arch supports user context tracking for NO_HZ_FULL

• ok: arm, arm64, csky loongarch, mips, powerpc riscv, sparc, x86, xtensa

• TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc s390, sh, um

virt-cpuacct

HAVE_VIRT_CPU_ACCOUNTING

arch supports precise virtual CPU time accounting

• ok: alpha, arm, arm64 csky, loongarch, mips parisc, powerpc, s390 sparc, x86, xtensa

• TODO: arc, hexagon m68k, microblaze, nios2 openrisc, riscv, sh, um

batch-unmap-tlb-flush

ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH

arch supports deferral of TLB flush until multiple pages are unmapped

• ok: arm64, riscv, x86

• TODO: alpha, arc, arm csky, hexagon, loongarch mips, parisc, powerpc, s390 sh, sparc, xtensa

• Not compatible: m68k microblaze, nios2, openrisc um

ELF-ASLR

ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT

arch randomizes the stack, heap and binary images of ELF binaries

• ok: arm, arm64, csky loongarch, mips, parisc powerpc, riscv, s390, x86

• TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, sh, sparc um, xtensa

huge-vmap

HAVE_ARCH_HUGE_VMAP

arch supports the arch_vmap_pud_supported() and arch_vmap_pmd_supported() VM APIs

• ok: arm64, powerpc riscv, x86

• TODO: alpha, arc, arm csky, hexagon, loongarch m68k, microblaze, mips nios2, openrisc, parisc s390, sh, sparc, um, xtensa

ioremap_prot

HAVE_IOREMAP_PROT

arch has ioremap_prot()

• ok: arc, arm64 loongarch, mips, powerpc riscv, s390, sh, x86

• TODO: alpha, arm, csky hexagon, m68k, microblaze nios2, openrisc, parisc sparc, um, xtensa

pte_special

ARCH_HAS_PTE_SPECIAL

arch supports the pte_special()/pte_mkspecial() VM APIs

• ok: alpha, arc, arm arm64, loongarch, mips parisc, powerpc, riscv s390, sh, sparc, x86

• TODO: csky, hexagon m68k, microblaze, nios2 openrisc, um, xtensa

THP

HAVE_ARCH_TRANSPARENT_HUGEPAGE

arch supports transparent hugepages

• ok: arc, arm, arm64 loongarch, mips, powerpc riscv, s390, sparc, x86

• TODO: alpha, parisc

• Not compatible: csky hexagon, m68k, microblaze nios2, openrisc, sh, um xtensa