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