Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_X86_MICROCODE_H
2#define _ASM_X86_MICROCODE_H
3
4#include <linux/earlycpio.h>
5
6#define native_rdmsr(msr, val1, val2) \
7do { \
8 u64 __val = native_read_msr((msr)); \
9 (void)((val1) = (u32)__val); \
10 (void)((val2) = (u32)(__val >> 32)); \
11} while (0)
12
13#define native_wrmsr(msr, low, high) \
14 native_write_msr(msr, low, high)
15
16#define native_wrmsrl(msr, val) \
17 native_write_msr((msr), \
18 (u32)((u64)(val)), \
19 (u32)((u64)(val) >> 32))
20
21struct cpu_signature {
22 unsigned int sig;
23 unsigned int pf;
24 unsigned int rev;
25};
26
27struct device;
28
29enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
30
31struct microcode_ops {
32 enum ucode_state (*request_microcode_user) (int cpu,
33 const void __user *buf, size_t size);
34
35 enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
36 bool refresh_fw);
37
38 void (*microcode_fini_cpu) (int cpu);
39
40 /*
41 * The generic 'microcode_core' part guarantees that
42 * the callbacks below run on a target cpu when they
43 * are being called.
44 * See also the "Synchronization" section in microcode_core.c.
45 */
46 int (*apply_microcode) (int cpu);
47 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
48};
49
50struct ucode_cpu_info {
51 struct cpu_signature cpu_sig;
52 int valid;
53 void *mc;
54};
55extern struct ucode_cpu_info ucode_cpu_info[];
56
57#ifdef CONFIG_MICROCODE
58int __init microcode_init(void);
59#else
60static inline int __init microcode_init(void) { return 0; };
61#endif
62
63#ifdef CONFIG_MICROCODE_INTEL
64extern struct microcode_ops * __init init_intel_microcode(void);
65#else
66static inline struct microcode_ops * __init init_intel_microcode(void)
67{
68 return NULL;
69}
70#endif /* CONFIG_MICROCODE_INTEL */
71
72#ifdef CONFIG_MICROCODE_AMD
73extern struct microcode_ops * __init init_amd_microcode(void);
74extern void __exit exit_amd_microcode(void);
75#else
76static inline struct microcode_ops * __init init_amd_microcode(void)
77{
78 return NULL;
79}
80static inline void __exit exit_amd_microcode(void) {}
81#endif
82
83#define MAX_UCODE_COUNT 128
84
85#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
86#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
87#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
88#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
89#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
90#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
91#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
92
93#define CPUID_IS(a, b, c, ebx, ecx, edx) \
94 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
95
96/*
97 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
98 * x86_vendor() gets vendor id for BSP.
99 *
100 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
101 * coding, we still use x86_vendor() to get vendor id for AP.
102 *
103 * x86_vendor() gets vendor information directly from CPUID.
104 */
105static inline int x86_vendor(void)
106{
107 u32 eax = 0x00000000;
108 u32 ebx, ecx = 0, edx;
109
110 native_cpuid(&eax, &ebx, &ecx, &edx);
111
112 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
113 return X86_VENDOR_INTEL;
114
115 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
116 return X86_VENDOR_AMD;
117
118 return X86_VENDOR_UNKNOWN;
119}
120
121static inline unsigned int __x86_family(unsigned int sig)
122{
123 unsigned int x86;
124
125 x86 = (sig >> 8) & 0xf;
126
127 if (x86 == 0xf)
128 x86 += (sig >> 20) & 0xff;
129
130 return x86;
131}
132
133static inline unsigned int x86_family(void)
134{
135 u32 eax = 0x00000001;
136 u32 ebx, ecx = 0, edx;
137
138 native_cpuid(&eax, &ebx, &ecx, &edx);
139
140 return __x86_family(eax);
141}
142
143static inline unsigned int x86_model(unsigned int sig)
144{
145 unsigned int x86, model;
146
147 x86 = __x86_family(sig);
148
149 model = (sig >> 4) & 0xf;
150
151 if (x86 == 0x6 || x86 == 0xf)
152 model += ((sig >> 16) & 0xf) << 4;
153
154 return model;
155}
156
157#ifdef CONFIG_MICROCODE
158extern void __init load_ucode_bsp(void);
159extern void load_ucode_ap(void);
160extern int __init save_microcode_in_initrd(void);
161void reload_early_microcode(void);
162extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
163#else
164static inline void __init load_ucode_bsp(void) { }
165static inline void load_ucode_ap(void) { }
166static inline int __init save_microcode_in_initrd(void) { return 0; }
167static inline void reload_early_microcode(void) { }
168static inline bool
169get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; }
170#endif
171#endif /* _ASM_X86_MICROCODE_H */