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 extern bool dis_ucode_ldr; 31 32 struct 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 51 struct ucode_cpu_info { 52 struct cpu_signature cpu_sig; 53 int valid; 54 void *mc; 55 }; 56 extern struct ucode_cpu_info ucode_cpu_info[]; 57 58 #ifdef CONFIG_MICROCODE_INTEL 59 extern struct microcode_ops * __init init_intel_microcode(void); 60 #else 61 static 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 68 extern struct microcode_ops * __init init_amd_microcode(void); 69 extern void __exit exit_amd_microcode(void); 70 #else 71 static inline struct microcode_ops * __init init_amd_microcode(void) 72 { 73 return NULL; 74 } 75 static 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 */ 101 static 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 } 116 117 static 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 } 128 129 static 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 } 138 139 static 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 } 152 153 extern void __init load_ucode_bsp(void); 154 extern void load_ucode_ap(void); 155 extern int __init save_microcode_in_initrd(void); 156 void reload_early_microcode(void); 157 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name); 158 #else 159 static inline void __init load_ucode_bsp(void) {} 160 static inline void load_ucode_ap(void) {} 161 static inline int __init save_microcode_in_initrd(void) 162 { 163 return 0; 164 } 165 static inline void reload_early_microcode(void) {} 166 static 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 */ 172