linux/arch/x86/kernel/cpu/cpu.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ARCH_X86_CPU_H
#define ARCH_X86_CPU_H

#include <asm/cpu.h>
#include <asm/topology.h>

#include "topology.h"

/* attempt to consolidate cpu attributes */
struct cpu_dev { … };

struct _tlb_table { … };

#define cpu_dev_register(cpu_devX) …

extern const struct cpu_dev *const __x86_cpu_dev_start[],
			    *const __x86_cpu_dev_end[];

#ifdef CONFIG_CPU_SUP_INTEL
enum tsx_ctrl_states { … };

extern __ro_after_init enum tsx_ctrl_states tsx_ctrl_state;

extern void __init tsx_init(void);
void tsx_ap_init(void);
void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c);
#else
static inline void tsx_init(void) { }
static inline void tsx_ap_init(void) { }
static inline void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c) { }
#endif /* CONFIG_CPU_SUP_INTEL */

extern void init_spectral_chicken(struct cpuinfo_x86 *c);

extern void get_cpu_cap(struct cpuinfo_x86 *c);
extern void get_cpu_address_sizes(struct cpuinfo_x86 *c);
extern void cpu_detect_cache_sizes(struct cpuinfo_x86 *c);
extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
extern void init_intel_cacheinfo(struct cpuinfo_x86 *c);
extern void init_amd_cacheinfo(struct cpuinfo_x86 *c);
extern void init_hygon_cacheinfo(struct cpuinfo_x86 *c);

extern void check_null_seg_clears_base(struct cpuinfo_x86 *c);

void cacheinfo_amd_init_llc_id(struct cpuinfo_x86 *c, u16 die_id);
void cacheinfo_hygon_init_llc_id(struct cpuinfo_x86 *c);

unsigned int aperfmperf_get_khz(int cpu);
void cpu_select_mitigations(void);

extern void x86_spec_ctrl_setup_ap(void);
extern void update_srbds_msr(void);
extern void update_gds_msr(void);

extern enum spectre_v2_mitigation spectre_v2_enabled;

static inline bool spectre_v2_in_eibrs_mode(enum spectre_v2_mitigation mode)
{ … }

#endif /* ARCH_X86_CPU_H */