Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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 */