arch/arm64/tools/gen-kernel-hwcaps.sh

File Facts

System

Linux kernel

Corpus path

arch/arm64/tools/gen-kernel-hwcaps.sh

Extension

.sh

Size

545 bytes

Lines

24

Domain

Architecture Layer

Bucket

arch/arm64

Inferred role

Architecture Layer: arch/arm64

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

#!/bin/sh -e
# SPDX-License-Identifier: GPL-2.0
#
# gen-kernel-hwcap.sh - Generate kernel internal hwcap.h definitions
#
# Copyright 2026 Arm, Ltd.

if [ "$1" = "" ]; then
	echo "$0: no filename specified"
	exit 1
fi

echo "#ifndef __ASM_KERNEL_HWCAPS_H"
echo "#define __ASM_KERNEL_HWCAPS_H"
echo ""
echo "/* Generated file - do not edit */"
echo ""

grep -E '^#define HWCAP[0-9]*_[A-Z0-9_]+' $1 | \
	sed 's/.*HWCAP\([0-9]*\)_\([A-Z0-9_]\+\).*/#define KERNEL_HWCAP_\2\t__khwcap\1_feature(\2)/'

echo ""
echo "#endif /* __ASM_KERNEL_HWCAPS_H */"

Annotation

• Atlas domain: Architecture Layer / arch/arm64.
• 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.