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, c6x, csky, h8300 hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, parisc, riscv s390, sh, um, x86, xtensa

eBPF-JIT

HAVE_EBPF_JIT

arch supports eBPF JIT optimizations

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

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, nds32 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, ia64 mips, openrisc, parisc powerpc, riscv, s390, sh sparc, x86, xtensa

  • TODO: c6x, h8300, m68k microblaze, nds32, nios2 um

jump-labels

HAVE_ARCH_JUMP_LABEL

arch supports live patched, high efficiency branches

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

  • TODO: alpha, c6x, csky h8300, hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, sh, um

tracehook

HAVE_ARCH_TRACEHOOK

arch supports tracehook (ptrace) register handling APIs

  • ok: arc, arm, arm64 c6x, csky, hexagon, ia64 mips, nds32, nios2 openrisc, parisc, powerpc riscv, s390, sh, sparc, x86 xtensa

  • TODO: alpha, h8300 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, riscv s390, x86

  • TODO: alpha, arm, c6x csky, h8300, hexagon, ia64 m68k, microblaze, mips nds32, nios2, openrisc parisc, powerpc, sh, sparc um, xtensa

gcov-profile-all

ARCH_HAS_GCOV_PROFILE_ALL

arch supports whole-kernel GCOV code coverage profiling

  • ok: arm, arm64, csky microblaze, powerpc, riscv s390, sh, x86

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k mips, nds32, nios2 openrisc, parisc, sparc, um xtensa

KASAN

HAVE_ARCH_KASAN

arch supports the KASAN runtime memory checker

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

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, mips nds32, nios2, openrisc parisc, sh, sparc, um

kcov

ARCH_HAS_KCOV

arch supports kcov for coverage-guided fuzzing

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

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, nds32 nios2, openrisc, parisc, sh sparc, xtensa

kgdb

HAVE_ARCH_KGDB

arch supports the kGDB kernel debugger

  • ok: arc, arm, arm64 h8300, hexagon, microblaze mips, nios2, parisc powerpc, riscv, sh, sparc x86

  • TODO: alpha, c6x, csky ia64, m68k, nds32, openrisc s390, um, xtensa

kmemleak

HAVE_DEBUG_KMEMLEAK

arch supports the kernel memory leak detector

  • ok: arc, arm, arm64 microblaze, mips, nds32 powerpc, riscv, s390, sh sparc, um, x86, xtensa

  • TODO: alpha, c6x, csky h8300, hexagon, ia64, m68k nios2, openrisc, parisc

kprobes

HAVE_KPROBES

arch supports live patched kernel probe

  • ok: arc, arm, arm64 csky, ia64, mips, parisc powerpc, s390, sh, sparc x86

  • TODO: alpha, c6x, h8300 hexagon, m68k, microblaze nds32, nios2, openrisc riscv, um, xtensa

kprobes-on-ftrace

HAVE_KPROBES_ON_FTRACE

arch supports combined kprobes and ftrace live patching

  • ok: csky, parisc powerpc, s390, x86

  • TODO: alpha, arc, arm arm64, c6x, h8300, hexagon ia64, m68k, microblaze mips, nds32, nios2 openrisc, riscv, sh, sparc um, xtensa

kretprobes

HAVE_KRETPROBES

arch supports kernel function-return probes

  • ok: arc, arm, arm64 csky, ia64, mips, parisc powerpc, s390, sh, sparc x86

  • TODO: alpha, c6x, h8300 hexagon, m68k, microblaze nds32, nios2, openrisc riscv, um, xtensa

optprobes

HAVE_OPTPROBES

arch supports live patched optprobes

  • ok: arm, powerpc, x86

  • TODO: alpha, arc, arm64 c6x, csky, h8300, hexagon ia64, m68k, microblaze mips, nds32, nios2 openrisc, parisc, riscv s390, sh, sparc, um, xtensa

stackprotector

HAVE_STACKPROTECTOR

arch supports compiler driven stack overflow protection

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

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, parisc, s390 sparc, um

uprobes

ARCH_SUPPORTS_UPROBES

arch supports live patched user probes

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

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, parisc, riscv, 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, c6x, csky, h8300 hexagon, ia64, m68k microblaze, mips, nds32 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 microblaze, mips, riscv s390, x86, xtensa

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k nds32, 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 c6x, csky, h8300, hexagon ia64, m68k, microblaze mips, nds32, 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, microblaze mips, nds32, openrisc powerpc, riscv, s390, sh sparc, um, x86, xtensa

  • TODO: alpha, c6x, h8300 ia64, m68k, nios2, parisc

queued-rwlocks

ARCH_USE_QUEUED_RWLOCKS

arch supports queued rwlocks

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

  • TODO: alpha, arc, arm c6x, h8300, hexagon, ia64 m68k, microblaze, nds32 nios2, parisc, riscv, s390 sh, um

queued-spinlocks

ARCH_USE_QUEUED_SPINLOCKS

arch supports queued spinlocks

  • ok: arm64, mips openrisc, powerpc, sparc x86, xtensa

  • TODO: alpha, arc, arm c6x, csky, h8300, hexagon ia64, m68k, microblaze nds32, 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: arm, arm64, csky hexagon, mips, nds32 parisc, powerpc, s390, sh sparc, x86

  • TODO: alpha, arc, c6x h8300, ia64, m68k microblaze, nios2, openrisc riscv, um, xtensa

perf-regs

HAVE_PERF_REGS

arch supports perf events register access

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

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, mips, nds32 nios2, openrisc, parisc, sh sparc, um, xtensa

perf-stackdump

HAVE_PERF_USER_STACK_DUMP

arch supports perf events stack dumps

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

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, mips, nds32 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 x86

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, mips nds32, nios2, openrisc parisc, riscv, s390, sh sparc, um, xtensa

numa-balancing

ARCH_SUPPORTS_NUMA_BALANCING

arch supports NUMA balancing

  • ok: arm64, powerpc s390, x86

  • TODO: alpha, ia64, mips nds32, riscv, sparc

  • Not compatible: arc arm, c6x, csky, h8300 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 mips, parisc, powerpc riscv, s390, sh, um, x86 xtensa

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, nds32, 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, mips powerpc, sh

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, nds32 nios2, openrisc, parisc riscv, s390, sparc, um, x86 xtensa

clockevents

!LEGACY_TIMER_TICK

arch support generic clock events

  • ok: alpha, arc, arm64 c6x, csky, h8300, hexagon microblaze, mips, nds32 nios2, openrisc, powerpc riscv, s390, sh, sparc, um x86, xtensa

  • TODO: arm, ia64, m68k parisc

context-tracking

HAVE_CONTEXT_TRACKING

arch supports context tracking for NO_HZ_FULL

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

  • TODO: alpha, arc, c6x h8300, hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, parisc, s390, sh um, xtensa

irq-time-acct

HAVE_IRQ_TIME_ACCOUNTING

arch supports precise IRQ time accounting

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

  • TODO: arc, c6x, csky h8300, hexagon, m68k microblaze, nds32, nios2 openrisc, sh, um

  • Not compatible: alpha ia64, parisc, s390, sparc

virt-cpuacct

HAVE_VIRT_CPU_ACCOUNTING

arch supports precise virtual CPU time accounting

  • ok: alpha, arm, arm64 csky, ia64, mips, parisc powerpc, s390, sparc, x86

  • TODO: arc, c6x, h8300 hexagon, m68k, microblaze nds32, nios2, openrisc riscv, sh, um, xtensa

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: x86

  • TODO: alpha, arc, arm arm64, csky, hexagon, ia64 mips, nds32, parisc powerpc, riscv, s390, sh sparc, xtensa

  • Not compatible: c6x h8300, m68k, microblaze nios2, openrisc, um

ELF-ASLR

ARCH_HAS_ELF_RANDOMIZE

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

  • ok: arm, arm64, mips parisc, powerpc, s390, x86

  • TODO: alpha, arc, c6x csky, h8300, hexagon, ia64 m68k, microblaze, nds32 nios2, openrisc, riscv, sh sparc, um, xtensa

huge-vmap

HAVE_ARCH_HUGE_VMAP

arch supports the ioremap_pud_enabled() and ioremap_pmd_enabled() VM APIs

  • ok: arm64, powerpc, x86

  • TODO: alpha, arc, arm c6x, csky, h8300, hexagon ia64, m68k, microblaze mips, nds32, nios2 openrisc, parisc, riscv s390, sh, sparc, um, xtensa

ioremap_prot

HAVE_IOREMAP_PROT

arch has ioremap_prot()

  • ok: arc, mips, powerpc s390, sh, x86

  • TODO: alpha, arm, arm64 c6x, csky, h8300, hexagon ia64, m68k, microblaze nds32, nios2, openrisc parisc, riscv, sparc, um xtensa

PG_uncached

ARCH_USES_PG_UNCACHED

arch supports the PG_uncached page flag

  • ok: ia64, x86

  • TODO: alpha, arc, arm arm64, c6x, csky, h8300 hexagon, m68k, microblaze mips, nds32, 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 mips, powerpc, riscv, s390 sh, sparc, x86

  • TODO: alpha, c6x, csky h8300, hexagon, ia64, m68k microblaze, nds32, nios2 openrisc, parisc, um xtensa

THP

HAVE_ARCH_TRANSPARENT_HUGEPAGE

arch supports transparent hugepages

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

  • TODO: alpha, ia64 nds32, parisc, riscv

  • Not compatible: c6x csky, h8300, hexagon, m68k microblaze, nios2, openrisc sh, um, xtensa