1 #ifndef _ASM_X86_MICROCODE_H
2 #define _ASM_X86_MICROCODE_H
3
4 #define native_rdmsr(msr, val1, val2) \
5 do { \
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
19 struct cpu_signature {
20 unsigned int sig;
21 unsigned int pf;
22 unsigned int rev;
23 };
24
25 struct device;
26
27 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
28 extern bool dis_ucode_ldr;
29
30 struct microcode_ops {
31 enum ucode_state (*request_microcode_user) (int cpu,
32 const void __user *buf, size_t size);
33
34 enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
35 bool refresh_fw);
36
37 void (*microcode_fini_cpu) (int cpu);
38
39 /*
40 * The generic 'microcode_core' part guarantees that
41 * the callbacks below run on a target cpu when they
42 * are being called.
43 * See also the "Synchronization" section in microcode_core.c.
44 */
45 int (*apply_microcode) (int cpu);
46 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
47 };
48
49 struct ucode_cpu_info {
50 struct cpu_signature cpu_sig;
51 int valid;
52 void *mc;
53 };
54 extern struct ucode_cpu_info ucode_cpu_info[];
55
56 #ifdef CONFIG_MICROCODE_INTEL
57 extern struct microcode_ops * __init init_intel_microcode(void);
58 #else
init_intel_microcode(void)59 static inline struct microcode_ops * __init init_intel_microcode(void)
60 {
61 return NULL;
62 }
63 #endif /* CONFIG_MICROCODE_INTEL */
64
65 #ifdef CONFIG_MICROCODE_AMD
66 extern struct microcode_ops * __init init_amd_microcode(void);
67 extern void __exit exit_amd_microcode(void);
68 #else
init_amd_microcode(void)69 static inline struct microcode_ops * __init init_amd_microcode(void)
70 {
71 return NULL;
72 }
exit_amd_microcode(void)73 static inline void __exit exit_amd_microcode(void) {}
74 #endif
75
76 #ifdef CONFIG_MICROCODE_EARLY
77 #define MAX_UCODE_COUNT 128
78 extern void __init load_ucode_bsp(void);
79 extern void load_ucode_ap(void);
80 extern int __init save_microcode_in_initrd(void);
81 void reload_early_microcode(void);
82 #else
load_ucode_bsp(void)83 static inline void __init load_ucode_bsp(void) {}
load_ucode_ap(void)84 static inline void load_ucode_ap(void) {}
save_microcode_in_initrd(void)85 static inline int __init save_microcode_in_initrd(void)
86 {
87 return 0;
88 }
reload_early_microcode(void)89 static inline void reload_early_microcode(void) {}
90 #endif
91
92 #endif /* _ASM_X86_MICROCODE_H */
93