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