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) \ 7 do { \ 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 21 struct cpu_signature { 22 unsigned int sig; 23 unsigned int pf; 24 unsigned int rev; 25 }; 26 27 struct device; 28 29 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND }; 30 31 struct 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 50 struct ucode_cpu_info { 51 struct cpu_signature cpu_sig; 52 int valid; 53 void *mc; 54 }; 55 extern struct ucode_cpu_info ucode_cpu_info[]; 56 57 #ifdef CONFIG_MICROCODE 58 int __init microcode_init(void); 59 #else 60 static inline int __init microcode_init(void) { return 0; }; 61 #endif 62 63 #ifdef CONFIG_MICROCODE_INTEL 64 extern struct microcode_ops * __init init_intel_microcode(void); 65 #else 66 static 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 73 extern struct microcode_ops * __init init_amd_microcode(void); 74 extern void __exit exit_amd_microcode(void); 75 #else 76 static inline struct microcode_ops * __init init_amd_microcode(void) 77 { 78 return NULL; 79 } 80 static 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 */ 105 static 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 } 120 121 static 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 } 132 133 static 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 } 142 143 static 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 158 extern void __init load_ucode_bsp(void); 159 extern void load_ucode_ap(void); 160 extern int __init save_microcode_in_initrd(void); 161 void reload_early_microcode(void); 162 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name); 163 #else 164 static inline void __init load_ucode_bsp(void) { } 165 static inline void load_ucode_ap(void) { } 166 static inline int __init save_microcode_in_initrd(void) { return 0; } 167 static inline void reload_early_microcode(void) { } 168 static inline bool 169 get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; } 170 #endif 171 #endif /* _ASM_X86_MICROCODE_H */ 172