cpu.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef ARCH_X86_CPU_H
 3#define ARCH_X86_CPU_H
 4
 5#include <asm/cpu.h>
 6#include <asm/topology.h>
 7
 8#include "topology.h"
 9
10/* attempt to consolidate cpu attributes */
11struct cpu_dev {
12	const char	*c_vendor;
13
14	/* some have two possibilities for cpuid string */
15	const char	*c_ident[2];
16
17	void            (*c_early_init)(struct cpuinfo_x86 *);
18	void		(*c_bsp_init)(struct cpuinfo_x86 *);
19	void		(*c_init)(struct cpuinfo_x86 *);
20	void		(*c_identify)(struct cpuinfo_x86 *);
21	void		(*c_detect_tlb)(struct cpuinfo_x86 *);
22	int		c_x86_vendor;
23#ifdef CONFIG_X86_32
24	/* Optional vendor specific routine to obtain the cache size. */
25	unsigned int	(*legacy_cache_size)(struct cpuinfo_x86 *,
26					     unsigned int);
27
28	/* Family/stepping-based lookup table for model names. */
29	struct legacy_cpu_model_info {
30		int		family;
31		const char	*model_names[16];
32	}		legacy_models[5];
33#endif
34};
35
36#define cpu_dev_register(cpu_devX) \
37	static const struct cpu_dev *const __cpu_dev_##cpu_devX __used \
38	__section(".x86_cpu_dev.init") = \
39	&cpu_devX;
40
41extern const struct cpu_dev *const __x86_cpu_dev_start[],
42			    *const __x86_cpu_dev_end[];
43
44#ifdef CONFIG_CPU_SUP_INTEL
45extern void __init tsx_init(void);
46void tsx_ap_init(void);
47void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c);
48#else
49static inline void tsx_init(void) { }
50static inline void tsx_ap_init(void) { }
51static inline void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c) { }
52#endif /* CONFIG_CPU_SUP_INTEL */
53
54extern void init_spectral_chicken(struct cpuinfo_x86 *c);
55
56extern void get_cpu_cap(struct cpuinfo_x86 *c);
57extern void get_cpu_address_sizes(struct cpuinfo_x86 *c);
58extern void cpu_detect_cache_sizes(struct cpuinfo_x86 *c);
59extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
60extern void init_intel_cacheinfo(struct cpuinfo_x86 *c);
61extern void init_amd_cacheinfo(struct cpuinfo_x86 *c);
62extern void init_hygon_cacheinfo(struct cpuinfo_x86 *c);
63
64extern void check_null_seg_clears_base(struct cpuinfo_x86 *c);
65
66void cacheinfo_amd_init_llc_id(struct cpuinfo_x86 *c, u16 die_id);
67void cacheinfo_hygon_init_llc_id(struct cpuinfo_x86 *c);
68
69#if defined(CONFIG_AMD_NB) && defined(CONFIG_SYSFS)
70struct amd_northbridge *amd_init_l3_cache(int index);
71#else
72static inline struct amd_northbridge *amd_init_l3_cache(int index)
73{
74	return NULL;
75}
76#endif
77
78unsigned int aperfmperf_get_khz(int cpu);
79void cpu_select_mitigations(void);
80
81extern void x86_spec_ctrl_setup_ap(void);
82extern void update_srbds_msr(void);
83extern void update_gds_msr(void);
84
85extern enum spectre_v2_mitigation spectre_v2_enabled;
86
87static inline bool spectre_v2_in_eibrs_mode(enum spectre_v2_mitigation mode)
88{
89	return mode == SPECTRE_V2_EIBRS ||
90	       mode == SPECTRE_V2_EIBRS_RETPOLINE ||
91	       mode == SPECTRE_V2_EIBRS_LFENCE;
92}
93
94#endif /* ARCH_X86_CPU_H */