Feature status on all architectures

Subsystem: core

Feature	Kconfig / Description	Status per architecture
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: arm, arm64 loongarch, mips, powerpc riscv, s390, sparc, x86 TODO: alpha, arc, csky hexagon, m68k, microblaze nios2, openrisc, parisc, 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, x86 xtensa TODO: m68k, microblaze nios2, um
jump-labels	HAVE_ARCH_JUMP_LABEL arch supports live patched, high efficiency branches	ok: arc, arm, arm64 csky, loongarch, mips parisc, powerpc, riscv s390, sparc, x86, xtensa TODO: alpha, hexagon m68k, microblaze, nios2 openrisc, sh, um
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, parisc powerpc, riscv, s390, x86 TODO: alpha, arc, csky hexagon, loongarch, m68k microblaze, mips, nios2 openrisc, sh, sparc, um xtensa
tracehook	HAVE_ARCH_TRACEHOOK arch supports tracehook (ptrace) register handling APIs	ok: arc, arm, arm64 csky, hexagon, loongarch mips, nios2, openrisc parisc, powerpc, riscv s390, sh, sparc, x86 xtensa TODO: alpha, m68k microblaze, um

Subsystem: debug

Feature	Kconfig / Description	Status per architecture
debug-vm-pgtable	ARCH_HAS_DEBUG_VM_PGTABLE arch supports pgtable tests for semantics compliance	ok: arc, arm64 loongarch, parisc, powerpc riscv, s390, x86, xtensa TODO: alpha, 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: arm, arm64, csky microblaze, mips, powerpc riscv, s390, sh, um, x86 xtensa TODO: alpha, 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: arc, arm, arm64 csky, loongarch, microblaze mips, powerpc, riscv, s390 sh, sparc, um, x86, xtensa TODO: alpha, 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, riscv s390, x86 TODO: alpha, arc, arm arm64, hexagon, m68k microblaze, mips, nios2 openrisc, 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, sh, x86, xtensa TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc s390, 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

Subsystem: io

Feature	Kconfig / Description	Status per architecture
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

Subsystem: locking

Feature	Kconfig / Description	Status per architecture
cmpxchg-local	HAVE_CMPXCHG_LOCAL arch supports the this_cpu_cmpxchg() API	ok: arm64, s390, x86 TODO: alpha, arc, arm csky, hexagon, loongarch m68k, microblaze, mips nios2, openrisc, parisc powerpc, riscv, sh, sparc um, xtensa
lockdep	LOCKDEP_SUPPORT arch supports the runtime locking correctness debug facility	ok: arc, arm, arm64 csky, hexagon, loongarch microblaze, mips, openrisc parisc, powerpc, riscv s390, sh, sparc, um, x86 xtensa TODO: alpha, 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, sparc, x86, xtensa TODO: alpha, arc, arm hexagon, m68k, microblaze nios2, parisc, riscv, s390 sh, um

Subsystem: perf

Feature	Kconfig / Description	Status per architecture
kprobes-event	HAVE_REGS_AND_STACK_ACCESS_API arch supports kprobes with perf events	ok: arc, arm, arm64 csky, hexagon, loongarch mips, parisc, powerpc riscv, s390, sh, sparc, x86 TODO: alpha, m68k microblaze, nios2, openrisc um, xtensa
perf-regs	HAVE_PERF_REGS arch supports perf events register access	ok: arm, arm64, csky loongarch, mips, powerpc riscv, s390, x86 TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc, sh sparc, um, xtensa
perf-stackdump	HAVE_PERF_USER_STACK_DUMP arch supports perf events stack dumps	ok: arm, arm64, csky loongarch, mips, powerpc riscv, s390, x86 TODO: alpha, arc hexagon, m68k, microblaze nios2, openrisc, parisc, sh sparc, um, xtensa

Subsystem: sched

Feature	Kconfig / Description	Status per architecture
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

Subsystem: seccomp

Feature	Kconfig / Description	Status per architecture
seccomp-filter	HAVE_ARCH_SECCOMP_FILTER arch supports seccomp filters	ok: arm, arm64, csky loongarch, m68k, mips parisc, powerpc, riscv s390, sh, um, x86, xtensa TODO: alpha, arc hexagon, microblaze, nios2 openrisc, sparc

Subsystem: time

Feature	Kconfig / Description	Status per architecture
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, powerpc, riscv s390, sh, sparc, um, x86 xtensa TODO: arm, m68k, parisc
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

Subsystem: vm

Feature	Kconfig / Description	Status per architecture
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 s390, sh, x86 TODO: alpha, arm, csky hexagon, m68k, microblaze nios2, openrisc, parisc riscv, sparc, um, xtensa
PG_uncached	ARCH_USES_PG_UNCACHED arch supports the PG_uncached page flag	ok: x86 TODO: alpha, arc, arm arm64, csky, hexagon loongarch, m68k, microblaze mips, nios2, openrisc parisc, powerpc, riscv s390, sh, sparc, um, xtensa
pte_special	ARCH_HAS_PTE_SPECIAL arch supports the pte_special()/pte_mkspecial() VM APIs	ok: arc, arm, arm64 loongarch, mips, parisc powerpc, riscv, s390, sh sparc, x86 TODO: alpha, 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