arch/x86/mm/tlb.c

File Facts

System

Linux kernel

Corpus path

arch/x86/mm/tlb.c

Extension

.c

Size

53682 bytes

Lines

1811

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/mm.h
• linux/spinlock.h
• linux/smp.h
• linux/interrupt.h
• linux/export.h
• linux/cpu.h
• linux/debugfs.h
• linux/sched/smt.h
• linux/task_work.h
• linux/mmu_notifier.h
• linux/mmu_context.h
• linux/kvm_types.h
• asm/tlbflush.h
• asm/mmu_context.h
• asm/nospec-branch.h
• asm/cache.h
• asm/cacheflush.h
• asm/apic.h
• asm/msr.h
• asm/perf_event.h
• asm/tlb.h
• mm_internal.h

Detected Declarations

• struct new_asid
• function kern_pcid
• function user_pcid
• function build_cr3
• function build_cr3_noflush
• function clear_asid_other
• function choose_new_asid
• function reset_global_asid_space
• function allocate_global_asid
• function mm_active_cpus_exceeds
• function use_global_asid
• function mm_free_global_asid
• function mm_needs_global_asid
• function ASIDs
• function finish_asid_transition
• function for_each_cpu
• function a
• function broadcast_tlb_flush
• function inc_mm_tlb_gen
• function invalidate_user_asid
• function load_new_mm_cr3
• function leave_mm
• function switch_mm
• function l1d_flush_force_sigbus
• function l1d_flush_evaluate
• function mm_mangle_tif_spec_bits
• function cond_mitigation
• function cr4_update_pce_mm
• function cr4_update_pce
• function cr4_update_pce_mm
• function leave_mm
• function membarrier
• function protections
• function unuse_temporary_mm
• function initialize_tlbstate_and_flush
• function flush_tlb_func
• function flush
• function should_flush_tlb
• function should_trim_cpumask
• function native_flush_tlb_multi
• function flush_tlb_multi
• function put_flush_tlb_info
• function flush_tlb_mm_range
• function flush_tlb_multi
• function do_flush_tlb_all
• function flush_tlb_all
• function invlpgb_kernel_range_flush
• function do_kernel_range_flush

Annotated Snippet

static const struct file_operations fops_tlbflush = {
	.read = tlbflush_read_file,
	.write = tlbflush_write_file,
	.llseek = default_llseek,
};

static int __init create_tlb_single_page_flush_ceiling(void)
{
	debugfs_create_file("tlb_single_page_flush_ceiling", S_IRUSR | S_IWUSR,
			    arch_debugfs_dir, NULL, &fops_tlbflush);
	return 0;
}
late_initcall(create_tlb_single_page_flush_ceiling);

Annotation

• Immediate include surface: `linux/init.h`, `linux/mm.h`, `linux/spinlock.h`, `linux/smp.h`, `linux/interrupt.h`, `linux/export.h`, `linux/cpu.h`, `linux/debugfs.h`.
• Detected declarations: `struct new_asid`, `function kern_pcid`, `function user_pcid`, `function build_cr3`, `function build_cr3_noflush`, `function clear_asid_other`, `function choose_new_asid`, `function reset_global_asid_space`, `function allocate_global_asid`, `function mm_active_cpus_exceeds`.
• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.