1 #ifndef _ASM_X86_MICROCODE_H 2 #define _ASM_X86_MICROCODE_H 3 4 #include <asm/cpu.h> 5 #include <linux/earlycpio.h> 6 #include <linux/initrd.h> 7 8 #define native_rdmsr(msr, val1, val2) \ 9 do { \ 10 u64 __val = native_read_msr((msr)); \ 11 (void)((val1) = (u32)__val); \ 12 (void)((val2) = (u32)(__val >> 32)); \ 13 } while (0) 14 15 #define native_wrmsr(msr, low, high) \ 16 native_write_msr(msr, low, high) 17 18 #define native_wrmsrl(msr, val) \ 19 native_write_msr((msr), \ 20 (u32)((u64)(val)), \ 21 (u32)((u64)(val) >> 32)) 22 23 struct cpu_signature { 24 unsigned int sig; 25 unsigned int pf; 26 unsigned int rev; 27 }; 28 29 struct device; 30 31 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND }; 32 33 struct microcode_ops { 34 enum ucode_state (*request_microcode_user) (int cpu, 35 const void __user *buf, size_t size); 36 37 enum ucode_state (*request_microcode_fw) (int cpu, struct device *, 38 bool refresh_fw); 39 40 void (*microcode_fini_cpu) (int cpu); 41 42 /* 43 * The generic 'microcode_core' part guarantees that 44 * the callbacks below run on a target cpu when they 45 * are being called. 46 * See also the "Synchronization" section in microcode_core.c. 47 */ 48 int (*apply_microcode) (int cpu); 49 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig); 50 }; 51 52 struct ucode_cpu_info { 53 struct cpu_signature cpu_sig; 54 int valid; 55 void *mc; 56 }; 57 extern struct ucode_cpu_info ucode_cpu_info[]; 58 59 #ifdef CONFIG_MICROCODE 60 int __init microcode_init(void); 61 #else 62 static inline int __init microcode_init(void) { return 0; }; 63 #endif 64 65 #ifdef CONFIG_MICROCODE_INTEL 66 extern struct microcode_ops * __init init_intel_microcode(void); 67 #else 68 static inline struct microcode_ops * __init init_intel_microcode(void) 69 { 70 return NULL; 71 } 72 #endif /* CONFIG_MICROCODE_INTEL */ 73 74 #ifdef CONFIG_MICROCODE_AMD 75 extern struct microcode_ops * __init init_amd_microcode(void); 76 extern void __exit exit_amd_microcode(void); 77 #else 78 static inline struct microcode_ops * __init init_amd_microcode(void) 79 { 80 return NULL; 81 } 82 static inline void __exit exit_amd_microcode(void) {} 83 #endif 84 85 #define MAX_UCODE_COUNT 128 86 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') 94 95 #define CPUID_IS(a, b, c, ebx, ecx, edx) \ 96 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c)))) 97 98 /* 99 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet. 100 * x86_cpuid_vendor() gets vendor id for BSP. 101 * 102 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify 103 * coding, we still use x86_cpuid_vendor() to get vendor id for AP. 104 * 105 * x86_cpuid_vendor() gets vendor information directly from CPUID. 106 */ 107 static inline int x86_cpuid_vendor(void) 108 { 109 u32 eax = 0x00000000; 110 u32 ebx, ecx = 0, edx; 111 112 native_cpuid(&eax, &ebx, &ecx, &edx); 113 114 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx)) 115 return X86_VENDOR_INTEL; 116 117 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx)) 118 return X86_VENDOR_AMD; 119 120 return X86_VENDOR_UNKNOWN; 121 } 122 123 static inline unsigned int x86_cpuid_family(void) 124 { 125 u32 eax = 0x00000001; 126 u32 ebx, ecx = 0, edx; 127 128 native_cpuid(&eax, &ebx, &ecx, &edx); 129 130 return x86_family(eax); 131 } 132 133 #ifdef CONFIG_MICROCODE 134 extern void __init load_ucode_bsp(void); 135 extern void load_ucode_ap(void); 136 void reload_early_microcode(void); 137 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name); 138 #else 139 static inline void __init load_ucode_bsp(void) { } 140 static inline void load_ucode_ap(void) { } 141 static inline void reload_early_microcode(void) { } 142 static inline bool 143 get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; } 144 #endif 145 146 #endif /* _ASM_X86_MICROCODE_H */ 147