arch/x86/kernel/cpu/cpuid-deps.c

Source file repositories/reference/linux-study-clean/arch/x86/kernel/cpu/cpuid-deps.c

File Facts

System: Linux kernel
Corpus path: arch/x86/kernel/cpu/cpuid-deps.c
Extension: .c
Size: 6906 bytes
Lines: 194
Domain: Architecture Layer
Bucket: arch/x86
Inferred role: Architecture Layer: implementation source
Status: source 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 or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/kernel.h
linux/init.h
linux/module.h
asm/cpufeature.h

Detected Declarations

struct cpuid_dep
function clear_feature
function do_clear_cpu_cap
function clear_cpu_cap
function setup_clear_cpu_cap
function check_cpufeature_deps

Annotated Snippet

struct cpuid_dep {
	unsigned int	feature;
	unsigned int	depends;
};

/*
 * Table of CPUID features that depend on others.
 *
 * This only includes dependencies that can be usefully disabled, not
 * features part of the base set (like FPU).
 *
 * Note this all is not __init / __initdata because it can be
 * called from cpu hotplug. It shouldn't do anything in this case,
 * but it's difficult to tell that to the init reference checker.
 */
static const struct cpuid_dep cpuid_deps[] = {
	{ X86_FEATURE_FXSR,			X86_FEATURE_FPU	      },
	{ X86_FEATURE_XSAVEOPT,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_XSAVEC,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_XSAVES,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_AVX,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_PKU,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_MPX,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_XGETBV1,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_APX,			X86_FEATURE_XSAVE     },
	{ X86_FEATURE_CMOV,			X86_FEATURE_FXSR      },
	{ X86_FEATURE_MMX,			X86_FEATURE_FXSR      },
	{ X86_FEATURE_MMXEXT,			X86_FEATURE_MMX       },
	{ X86_FEATURE_FXSR_OPT,			X86_FEATURE_FXSR      },
	{ X86_FEATURE_XSAVE,			X86_FEATURE_FXSR      },
	{ X86_FEATURE_XMM,			X86_FEATURE_FXSR      },
	{ X86_FEATURE_XMM2,			X86_FEATURE_XMM       },
	{ X86_FEATURE_XMM3,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_XMM4_1,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_XMM4_2,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_XMM3,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_PCLMULQDQ,		X86_FEATURE_XMM2      },
	{ X86_FEATURE_SSSE3,			X86_FEATURE_XMM2,     },
	{ X86_FEATURE_F16C,			X86_FEATURE_XMM2,     },
	{ X86_FEATURE_AES,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_SHA_NI,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_GFNI,			X86_FEATURE_XMM2      },
	{ X86_FEATURE_AVX_VNNI,			X86_FEATURE_AVX       },
	{ X86_FEATURE_FMA,			X86_FEATURE_AVX       },
	{ X86_FEATURE_VAES,			X86_FEATURE_AVX       },
	{ X86_FEATURE_VPCLMULQDQ,		X86_FEATURE_AVX       },
	{ X86_FEATURE_AVX2,			X86_FEATURE_AVX,      },
	{ X86_FEATURE_AVX512F,			X86_FEATURE_AVX,      },
	{ X86_FEATURE_AVX512IFMA,		X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512PF,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512ER,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512CD,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512DQ,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512BW,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512VL,			X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512VBMI,		X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512_VBMI2,		X86_FEATURE_AVX512VL  },
	{ X86_FEATURE_AVX512_VNNI,		X86_FEATURE_AVX512VL  },
	{ X86_FEATURE_AVX512_BITALG,		X86_FEATURE_AVX512VL  },
	{ X86_FEATURE_AVX512_4VNNIW,		X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512_4FMAPS,		X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512_VPOPCNTDQ,		X86_FEATURE_AVX512F   },
	{ X86_FEATURE_AVX512_VP2INTERSECT,	X86_FEATURE_AVX512VL  },
	{ X86_FEATURE_CQM_OCCUP_LLC,		X86_FEATURE_CQM_LLC   },
	{ X86_FEATURE_CQM_MBM_TOTAL,		X86_FEATURE_CQM_LLC   },
	{ X86_FEATURE_CQM_MBM_LOCAL,		X86_FEATURE_CQM_LLC   },
	{ X86_FEATURE_BMEC,			X86_FEATURE_CQM_MBM_TOTAL   },
	{ X86_FEATURE_BMEC,			X86_FEATURE_CQM_MBM_LOCAL   },
	{ X86_FEATURE_SDCIAE,			X86_FEATURE_CAT_L3    },
	{ X86_FEATURE_AVX512_BF16,		X86_FEATURE_AVX512VL  },
	{ X86_FEATURE_AVX512_FP16,		X86_FEATURE_AVX512BW  },
	{ X86_FEATURE_ENQCMD,			X86_FEATURE_XSAVES    },
	{ X86_FEATURE_PER_THREAD_MBA,		X86_FEATURE_MBA       },
	{ X86_FEATURE_SGX_LC,			X86_FEATURE_SGX	      },
	{ X86_FEATURE_SGX1,			X86_FEATURE_SGX       },
	{ X86_FEATURE_SGX2,			X86_FEATURE_SGX1      },
	{ X86_FEATURE_SGX_EUPDATESVN,		X86_FEATURE_SGX1      },
	{ X86_FEATURE_SGX_EDECCSSA,		X86_FEATURE_SGX1      },
	{ X86_FEATURE_XFD,			X86_FEATURE_XSAVES    },
	{ X86_FEATURE_XFD,			X86_FEATURE_XGETBV1   },
	{ X86_FEATURE_AMX_TILE,			X86_FEATURE_XFD       },
	{ X86_FEATURE_AMX_FP16,			X86_FEATURE_AMX_TILE  },
	{ X86_FEATURE_AMX_BF16,			X86_FEATURE_AMX_TILE  },
	{ X86_FEATURE_AMX_INT8,			X86_FEATURE_AMX_TILE  },
	{ X86_FEATURE_SHSTK,			X86_FEATURE_XSAVES    },
	{ X86_FEATURE_FRED,			X86_FEATURE_LKGS      },
	{ X86_FEATURE_SPEC_CTRL_SSBD,		X86_FEATURE_SPEC_CTRL },
	{ X86_FEATURE_LASS,			X86_FEATURE_SMAP      },
	{ X86_FEATURE_INVLPGB,			X86_FEATURE_PCID      },
	{}

Annotation

Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/module.h`, `asm/cpufeature.h`.
Detected declarations: `struct cpuid_dep`, `function clear_feature`, `function do_clear_cpu_cap`, `function clear_cpu_cap`, `function setup_clear_cpu_cap`, `function check_cpufeature_deps`.
Atlas domain: Architecture Layer / arch/x86.
Implementation status: source implementation candidate.

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.