1 #ifndef _ASM_X86_MICROCODE_H
2 #define _ASM_X86_MICROCODE_H
4 #include <linux/earlycpio.h>
6 #define native_rdmsr(msr, val1, val2) \
8 u64 __val = native_read_msr((msr)); \
9 (void)((val1) = (u32)__val); \
10 (void)((val2) = (u32)(__val >> 32)); \
13 #define native_wrmsr(msr, low, high) \
14 native_write_msr(msr, low, high)
16 #define native_wrmsrl(msr, val) \
17 native_write_msr((msr), \
19 (u32)((u64)(val) >> 32))
21 struct cpu_signature {
29 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
30 extern bool dis_ucode_ldr;
32 struct microcode_ops {
33 enum ucode_state (*request_microcode_user) (int cpu,
34 const void __user *buf, size_t size);
36 enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
39 void (*microcode_fini_cpu) (int cpu);
42 * The generic 'microcode_core' part guarantees that
43 * the callbacks below run on a target cpu when they
45 * See also the "Synchronization" section in microcode_core.c.
47 int (*apply_microcode) (int cpu);
48 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
51 struct ucode_cpu_info {
52 struct cpu_signature cpu_sig;
56 extern struct ucode_cpu_info ucode_cpu_info[];
58 #ifdef CONFIG_MICROCODE
59 int __init microcode_init(void);
61 static inline int __init microcode_init(void) { return 0; };
64 #ifdef CONFIG_MICROCODE_INTEL
65 extern struct microcode_ops * __init init_intel_microcode(void);
67 static inline struct microcode_ops * __init init_intel_microcode(void)
71 #endif /* CONFIG_MICROCODE_INTEL */
73 #ifdef CONFIG_MICROCODE_AMD
74 extern struct microcode_ops * __init init_amd_microcode(void);
75 extern void __exit exit_amd_microcode(void);
77 static inline struct microcode_ops * __init init_amd_microcode(void)
81 static inline void __exit exit_amd_microcode(void) {}
84 #ifdef CONFIG_MICROCODE_EARLY
85 #define MAX_UCODE_COUNT 128
87 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
88 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
89 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
90 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
91 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
92 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
93 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
95 #define CPUID_IS(a, b, c, ebx, ecx, edx) \
96 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
99 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
100 * x86_vendor() gets vendor id for BSP.
102 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
103 * coding, we still use x86_vendor() to get vendor id for AP.
105 * x86_vendor() gets vendor information directly from CPUID.
107 static inline int x86_vendor(void)
109 u32 eax = 0x00000000;
110 u32 ebx, ecx = 0, edx;
112 native_cpuid(&eax, &ebx, &ecx, &edx);
114 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
115 return X86_VENDOR_INTEL;
117 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
118 return X86_VENDOR_AMD;
120 return X86_VENDOR_UNKNOWN;
123 static inline unsigned int __x86_family(unsigned int sig)
127 x86 = (sig >> 8) & 0xf;
130 x86 += (sig >> 20) & 0xff;
135 static inline unsigned int x86_family(void)
137 u32 eax = 0x00000001;
138 u32 ebx, ecx = 0, edx;
140 native_cpuid(&eax, &ebx, &ecx, &edx);
142 return __x86_family(eax);
145 static inline unsigned int x86_model(unsigned int sig)
147 unsigned int x86, model;
149 x86 = __x86_family(sig);
151 model = (sig >> 4) & 0xf;
153 if (x86 == 0x6 || x86 == 0xf)
154 model += ((sig >> 16) & 0xf) << 4;
159 extern void __init load_ucode_bsp(void);
160 extern void load_ucode_ap(void);
161 extern int __init save_microcode_in_initrd(void);
162 void reload_early_microcode(void);
163 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
165 static inline void __init load_ucode_bsp(void) {}
166 static inline void load_ucode_ap(void) {}
167 static inline int __init save_microcode_in_initrd(void)
171 static inline void reload_early_microcode(void) {}
172 static inline bool get_builtin_firmware(struct cpio_data *cd, const char *name)
177 #endif /* _ASM_X86_MICROCODE_H */