arch/x86/configs/hardening.config

File Facts

System

Linux kernel

Corpus path

arch/x86/configs/hardening.config

Extension

.config

Size

473 bytes

Lines

18

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: arch/x86

Status

atlas-only

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.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

# Basic kernel hardening options (specific to x86)

# Modern libc no longer needs a fixed-position mapping in userspace, remove
# it as a possible target.
CONFIG_LEGACY_VSYSCALL_NONE=y

# Enable chip-specific IOMMU support.
CONFIG_INTEL_IOMMU=y
CONFIG_INTEL_IOMMU_DEFAULT_ON=y
CONFIG_INTEL_IOMMU_SVM=y
CONFIG_AMD_IOMMU=y

# Enforce CET Indirect Branch Tracking in the kernel.
CONFIG_X86_KERNEL_IBT=y

# Enable CET Shadow Stack for userspace.
CONFIG_X86_USER_SHADOW_STACK=y

Annotation

• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: atlas-only.

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.