1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_MICROCODE_H
 3#define _ASM_X86_MICROCODE_H
 4
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5struct cpu_signature {
 6	unsigned int sig;
 7	unsigned int pf;
 8	unsigned int rev;
 9};
10
11struct ucode_cpu_info {
12	struct cpu_signature	cpu_sig;
13	void			*mc;
14};
15
16#ifdef CONFIG_MICROCODE
17void load_ucode_bsp(void);
18void load_ucode_ap(void);
19void microcode_bsp_resume(void);
20#else
21static inline void load_ucode_bsp(void)	{ }
22static inline void load_ucode_ap(void) { }
23static inline void microcode_bsp_resume(void) { }
24#endif
25
26extern unsigned long initrd_start_early;
27
28#ifdef CONFIG_CPU_SUP_INTEL
29/* Intel specific microcode defines. Public for IFS */
30struct microcode_header_intel {
31	unsigned int	hdrver;
32	unsigned int	rev;
33	unsigned int	date;
34	unsigned int	sig;
35	unsigned int	cksum;
36	unsigned int	ldrver;
37	unsigned int	pf;
38	unsigned int	datasize;
39	unsigned int	totalsize;
40	unsigned int	metasize;
41	unsigned int	min_req_ver;
42	unsigned int	reserved;
 
 
43};
44
45struct microcode_intel {
46	struct microcode_header_intel	hdr;
47	unsigned int			bits[];
 
48};
 
49
50#define DEFAULT_UCODE_DATASIZE		(2000)
51#define MC_HEADER_SIZE			(sizeof(struct microcode_header_intel))
52#define MC_HEADER_TYPE_MICROCODE	1
53#define MC_HEADER_TYPE_IFS		2
54
55static inline int intel_microcode_get_datasize(struct microcode_header_intel *hdr)
56{
57	return hdr->datasize ? : DEFAULT_UCODE_DATASIZE;
58}
 
59
60static inline u32 intel_get_microcode_revision(void)
 
 
 
 
61{
62	u32 rev, dummy;
63
64	native_wrmsrl(MSR_IA32_UCODE_REV, 0);
65
66	/* As documented in the SDM: Do a CPUID 1 here */
67	native_cpuid_eax(1);
68
69	/* get the current revision from MSR 0x8B */
70	native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev);
71
72	return rev;
73}
74#endif /* !CONFIG_CPU_SUP_INTEL */
75
76bool microcode_nmi_handler(void);
77void microcode_offline_nmi_handler(void);
78
79#ifdef CONFIG_MICROCODE_LATE_LOADING
80DECLARE_STATIC_KEY_FALSE(microcode_nmi_handler_enable);
81static __always_inline bool microcode_nmi_handler_enabled(void)
 
 
 
 
 
 
82{
83	return static_branch_unlikely(&microcode_nmi_handler_enable);
84}
85#else
86static __always_inline bool microcode_nmi_handler_enabled(void) { return false; }
87#endif
88
89#endif /* _ASM_X86_MICROCODE_H */

 
 1#ifndef _ASM_X86_MICROCODE_H
 2#define _ASM_X86_MICROCODE_H
 3
 4#define native_rdmsr(msr, val1, val2)			\
 5do {							\
 6	u64 __val = native_read_msr((msr));		\
 7	(void)((val1) = (u32)__val);			\
 8	(void)((val2) = (u32)(__val >> 32));		\
 9} while (0)
10
11#define native_wrmsr(msr, low, high)			\
12	native_write_msr(msr, low, high)
13
14#define native_wrmsrl(msr, val)				\
15	native_write_msr((msr),				\
16			 (u32)((u64)(val)),		\
17			 (u32)((u64)(val) >> 32))
18
19struct cpu_signature {
20	unsigned int sig;
21	unsigned int pf;
22	unsigned int rev;
23};
24
25struct device;
 
 
 
26
27enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
 
 
 
 
 
 
 
 
 
 
28
29struct microcode_ops {
30	enum ucode_state (*request_microcode_user) (int cpu,
31				const void __user *buf, size_t size);
32
33	enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
34						  bool refresh_fw);
35
36	void (*microcode_fini_cpu) (int cpu);
37
38	/*
39	 * The generic 'microcode_core' part guarantees that
40	 * the callbacks below run on a target cpu when they
41	 * are being called.
42	 * See also the "Synchronization" section in microcode_core.c.
43	 */
44	int (*apply_microcode) (int cpu);
45	int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
46};
47
48struct ucode_cpu_info {
49	struct cpu_signature	cpu_sig;
50	int			valid;
51	void			*mc;
52};
53extern struct ucode_cpu_info ucode_cpu_info[];
54
55#ifdef CONFIG_MICROCODE_INTEL
56extern struct microcode_ops * __init init_intel_microcode(void);
57#else
58static inline struct microcode_ops * __init init_intel_microcode(void)
 
 
59{
60	return NULL;
61}
62#endif /* CONFIG_MICROCODE_INTEL */
63
64#ifdef CONFIG_MICROCODE_AMD
65extern struct microcode_ops * __init init_amd_microcode(void);
66extern void __exit exit_amd_microcode(void);
67#else
68static inline struct microcode_ops * __init init_amd_microcode(void)
69{
70	return NULL;
 
 
 
 
 
 
 
 
 
 
71}
72static inline void __exit exit_amd_microcode(void) {}
73#endif
 
 
74
75#ifdef CONFIG_MICROCODE_EARLY
76#define MAX_UCODE_COUNT 128
77extern void __init load_ucode_bsp(void);
78extern void load_ucode_ap(void);
79extern int __init save_microcode_in_initrd(void);
80#else
81static inline void __init load_ucode_bsp(void) {}
82static inline void load_ucode_ap(void) {}
83static inline int __init save_microcode_in_initrd(void)
84{
85	return 0;
86}
 
 
87#endif
88
89#endif /* _ASM_X86_MICROCODE_H */