arch/x86/kvm/debugfs.c

File Facts

System

Linux kernel

Corpus path

arch/x86/kvm/debugfs.c

Extension

.c

Size

5009 bytes

Lines

197

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/kvm_host.h
• linux/debugfs.h
• lapic.h
• mmu.h
• mmu/mmu_internal.h

Detected Declarations

• function vcpu_get_timer_advance_ns
• function vcpu_get_guest_mode
• function vcpu_get_tsc_offset
• function vcpu_get_tsc_scaling_ratio
• function vcpu_get_tsc_scaling_frac_bits
• function kvm_arch_create_vcpu_debugfs
• function kvm_mmu_rmaps_stat_show
• function kvm_mmu_rmaps_stat_open
• function kvm_mmu_rmaps_stat_release
• function kvm_arch_create_vm_debugfs

Annotated Snippet

static const struct file_operations mmu_rmaps_stat_fops = {
	.owner		= THIS_MODULE,
	.open		= kvm_mmu_rmaps_stat_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= kvm_mmu_rmaps_stat_release,
};

void kvm_arch_create_vm_debugfs(struct kvm *kvm)
{
	debugfs_create_file("mmu_rmaps_stat", 0644, kvm->debugfs_dentry, kvm,
			    &mmu_rmaps_stat_fops);
}

Annotation

• Immediate include surface: `linux/kvm_host.h`, `linux/debugfs.h`, `lapic.h`, `mmu.h`, `mmu/mmu_internal.h`.
• Detected declarations: `function vcpu_get_timer_advance_ns`, `function vcpu_get_guest_mode`, `function vcpu_get_tsc_offset`, `function vcpu_get_tsc_scaling_ratio`, `function vcpu_get_tsc_scaling_frac_bits`, `function kvm_arch_create_vcpu_debugfs`, `function kvm_mmu_rmaps_stat_show`, `function kvm_mmu_rmaps_stat_open`, `function kvm_mmu_rmaps_stat_release`, `function kvm_arch_create_vm_debugfs`.
• 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.