4. Feature status on loongarch architecture

Subsystem	Feature	Kconfig	Status	Description
core	cBPF-JIT	HAVE_CBPF_JIT		arch supports cBPF JIT optimizations
core	eBPF-JIT	HAVE_EBPF_JIT		arch supports eBPF JIT optimizations
core	generic-idle-thread	GENERIC_SMP_IDLE_THREAD		arch makes use of the generic SMP idle thread facility
core	jump-labels	HAVE_ARCH_JUMP_LABEL		arch supports live patched, high efficiency branches
core	thread-info-in-task	THREAD_INFO_IN_TASK		arch makes use of the core kernel facility to embedd thread_info in task_struct
core	tracehook	HAVE_ARCH_TRACEHOOK		arch supports tracehook (ptrace) register handling APIs
debug	debug-vm-pgtable	ARCH_HAS_DEBUG_VM_PGTABLE		arch supports pgtable tests for semantics compliance
debug	gcov-profile-all	ARCH_HAS_GCOV_PROFILE_ALL		arch supports whole-kernel GCOV code coverage profiling
debug	KASAN	HAVE_ARCH_KASAN		arch supports the KASAN runtime memory checker
debug	kcov	ARCH_HAS_KCOV		arch supports kcov for coverage-guided fuzzing
debug	kgdb	HAVE_ARCH_KGDB		arch supports the kGDB kernel debugger
debug	kmemleak	HAVE_DEBUG_KMEMLEAK		arch supports the kernel memory leak detector
debug	kprobes	HAVE_KPROBES		arch supports live patched kernel probe
debug	kprobes-on-ftrace	HAVE_KPROBES_ON_FTRACE		arch supports combined kprobes and ftrace live patching
debug	kretprobes	HAVE_KRETPROBES		arch supports kernel function-return probes
debug	optprobes	HAVE_OPTPROBES		arch supports live patched optprobes
debug	stackprotector	HAVE_STACKPROTECTOR		arch supports compiler driven stack overflow protection
debug	uprobes	ARCH_SUPPORTS_UPROBES		arch supports live patched user probes
debug	user-ret-profiler	HAVE_USER_RETURN_NOTIFIER		arch supports user-space return from system call profiler
io	dma-contiguous	HAVE_DMA_CONTIGUOUS		arch supports the DMA CMA (continuous memory allocator)
locking	cmpxchg-local	HAVE_CMPXCHG_LOCAL		arch supports the this_cpu_cmpxchg() API
locking	lockdep	LOCKDEP_SUPPORT		arch supports the runtime locking correctness debug facility
locking	queued-rwlocks	ARCH_USE_QUEUED_RWLOCKS		arch supports queued rwlocks
locking	queued-spinlocks	ARCH_USE_QUEUED_SPINLOCKS		arch supports queued spinlocks
perf	kprobes-event	HAVE_REGS_AND_STACK_ACCESS_API		arch supports kprobes with perf events
perf	perf-regs	HAVE_PERF_REGS		arch supports perf events register access
perf	perf-stackdump	HAVE_PERF_USER_STACK_DUMP		arch supports perf events stack dumps
sched	membarrier-sync-core	ARCH_HAS_MEMBARRIER_SYNC_CORE		arch supports core serializing membarrier
sched	numa-balancing	ARCH_SUPPORTS_NUMA_BALANCING		arch supports NUMA balancing
seccomp	seccomp-filter	HAVE_ARCH_SECCOMP_FILTER		arch supports seccomp filters
time	arch-tick-broadcast	ARCH_HAS_TICK_BROADCAST		arch provides tick_broadcast()
time	clockevents	!LEGACY_TIMER_TICK		arch support generic clock events
time	irq-time-acct	HAVE_IRQ_TIME_ACCOUNTING		arch supports precise IRQ time accounting
time	user-context-tracking	HAVE_CONTEXT_TRACKING_USER		arch supports user context tracking for NO_HZ_FULL
time	virt-cpuacct	HAVE_VIRT_CPU_ACCOUNTING		arch supports precise virtual CPU time accounting
vm	batch-unmap-tlb-flush	ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH		arch supports deferral of TLB flush until multiple pages are unmapped
vm	ELF-ASLR	ARCH_HAS_ELF_RANDOMIZE		arch randomizes the stack, heap and binary images of ELF binaries
vm	huge-vmap	HAVE_ARCH_HUGE_VMAP		arch supports the arch_vmap_pud_supported() and arch_vmap_pmd_supported() VM APIs
vm	ioremap_prot	HAVE_IOREMAP_PROT		arch has ioremap_prot()
vm	PG_uncached	ARCH_USES_PG_UNCACHED		arch supports the PG_uncached page flag
vm	pte_special	ARCH_HAS_PTE_SPECIAL		arch supports the pte_special()/pte_mkspecial() VM APIs
vm	THP	HAVE_ARCH_TRANSPARENT_HUGEPAGE		arch supports transparent hugepages